Document Number: 322169-004
Intel® 5 Series Chipset and
Intel® 3400 Series Chipset
Datasheet
January 2012
2Datasheet
INFORMATION IN THIS DOCUMENT IS PROVIDED IN CONNECTION WITH INTEL PRODUCTS. NO LICENSE, EXPRESS OR IMPLIED, BY ESTOPPEL OR
OTHERWISE, TO ANY INTELLECTUAL PROPERTY RIGHTS IS GRANTED BY THIS DOCUMENT. EXCEPT AS PROVIDED IN INTEL'S TERMS AND CONDITIONS
OF SALE FOR SUCH PRODUCTS, INTEL ASSUMES NO LIABILITY WHATSOEVER AND INTEL DISCLAIMS ANY EXPRESS OR IMPLIED WARRANTY, RELATING
TO SALE AND/OR USE OF INTEL PRODUCTS INCLUDING LIABILITY OR WARRANTIES RELATING TO FITNESS FOR A PARTICULAR PURPOSE,
MERCHANTABILITY, OR INFRINGEMENT OF ANY PATENT, COPYRIGHT OR OTHER INTELLECTUAL PROPERTY RIGHT.
UNLESS OTHERWISE AGREED IN WRITING BY INTEL, THE INTEL PRODUCTS ARE NOT DESIGNED NOR INTENDED FOR ANY APPLICATION IN WHICH THE
FAILURE OF THE INTEL PRODUCT COULD CREATE A SITUATION WHERE PERSONAL INJURY OR DEATH MAY OCCUR.
Intel may make changes to specifications and product descriptions at any time, without notice. Designers must not rely on the absence or characteristics
of any features or instructions marked "reserved" or "undefined." Intel reserves these for future definition and shall have no responsibility whatsoever
for conflicts or incompatibilities arising from future changes to them. The information here is subject to change without notice. Do not finalize a design
with this information.
The products described in this document may contain design defects or errors known as errata which may cause the product to deviate from published
specifications. Current characterized errata are available on request.
Contact your local Intel sales office or your distributor to obtain the latest specifications and before placing your product order.
Copies of documents which have an order number and are referenced in this document, or other Intel literature, may be obtained at http://
www.intel.com/design/literature.htm.
Code names featured are used internally within Intel to identify products that are in development and not yet publicly announced for release.
Customers, licensees and other third parties are not authorized by Intel to use code names in advertising, promotion or marketing of any product or
services and any such use of Intel's internal code names is at the sole risk of the user.
Intel® Virtualization Technology requires a computer system with an enabled Intel® processor, BIOS, virtual machine monitor (VMM). Functionality,
performance or other benefits will vary depending on hardware and software configurations. Software applications may not be compatible with all
operating systems. Consult your PC manufacturer. For more information, visit: http://www.intel.com/go/virtualization.
Intel® Active Management Technology requires activation and a system with a corporate network connection, an Intel® AMT-enabled chipset, network
hardware and software. For notebooks, Intel AMT may be unavailable or limited over a host OS-based VPN, when connecting wirelessly, on battery
power, sleeping, hibernating or powered off. Results dependent upon hardware, setup & configuration. For more information, visit http://
www.intel.com/technology/platform-technology/intel-amt.
Intel® High Definition Audio (Intel® HD Audio) requires an Intel® HD Audio enabled system. Consult your PC manufacturer for more information.
Sound quality will depend on equipment and actual implementation. For more information about Intel HD Audio, refer to http://www.intel.com/design/
chipsets/hdaudio.htm.
The original equipment manufacturer must provide TPM functionality, which requires a TPM-supported BIOS. TPM functionality must be initialized and
may not be available in all countries.
Intel® Anti-Theft Technology-PC Protection (Intel® AT-p). No computer system can provide absolute security under all conditions. Intel® Anti-Theft
Technology (Intel® AT-p) requires the computer system to have an Intel® AT-enabled chipset, BIOS, firmware release, software and an Intel AT-capable
Service Provider/ISV application and service subscription. The detection (triggers), response (actions), and recovery mechanisms only work after the
Intel® AT functionality has been activated and configured. Certain functionality may not be offered by some ISVs or service providers and may not be
available in all countries. Intel assumes no liability for lost or stolen data and/or systems or any other damages resulting thereof.
Systems using Client Initiated Remote Access require wired LAN connectivity and may not be available in public hot spots or "click to accept" locations.
For more information, refer to http://software.intel.com/en-us/blogs/2008/10/09/new-with-intel-amt-4050-fast-call-for-help-and-remote-pc-assist-aka-
cira/
Intel and the Intel logo are trademarks of Intel Corporation in the U.S. and other countries.
*Other names and brands may be claimed as the property of others.
Copyright © 2012, Intel Corporation. All rights reserved.
Datasheet 3
Contents
1Introduction............................................................................................................ 43
1.1 About This Manual............................................................................................. 43
1.2 Overview ......................................................................................................... 47
1.2.1 Capability Overview............................................................................. 49
1.3 Intel® 5 Series Chipset and Intel® 3400 Series Chipset SKU Definition ..................... 55
1.4 Reference Documents ........................................................................................ 57
2 Signal Description ................................................................................................... 59
2.1 Direct Media Interface (DMI) to Host Controller ..................................................... 61
2.2 PCI Express* .................................................................................................... 61
2.3 Firmware Hub Interface...................................................................................... 62
2.4 PCI Interface .................................................................................................... 63
2.5 Serial ATA Interface........................................................................................... 65
2.6 LPC Interface.................................................................................................... 68
2.7 Interrupt Interface ............................................................................................ 68
2.8 USB Interface ................................................................................................... 69
2.9 Power Management Interface.............................................................................. 71
2.10 Processor Interface............................................................................................ 74
2.11 SMBus Interface................................................................................................ 74
2.12 System Management Interface............................................................................ 75
2.13 Real Time Clock Interface ................................................................................... 75
2.14 Miscellaneous Signals ........................................................................................ 76
2.15 Intel® High Definition Audio Link ......................................................................... 77
2.16 Controller Link .................................................................................................. 78
2.17 Serial Peripheral Interface (SPI) .......................................................................... 78
2.18 Intel® Quiet System Technology and Thermal Reporting......................................... 79
2.19 JTAG Signals .................................................................................................... 80
2.20 Clock Signals .................................................................................................... 80
2.21 LVDS Signals (Mobile only) ................................................................................. 82
2.22 Analog Display /CRT DAC Signals ........................................................................ 83
2.23 Intel® Flexible Display Interface (FDI).................................................................. 84
2.24 Digital Display Signals........................................................................................ 84
2.25 General Purpose I/O Signals ............................................................................... 87
2.26 Manageability Signals ........................................................................................ 90
2.27 Power and Ground Signals.................................................................................. 91
2.28 Pin Straps ........................................................................................................ 93
2.28.1 Functional Straps ................................................................................ 93
2.28.2 External RTC Circuitry.......................................................................... 97
3PCH Pin States......................................................................................................... 99
3.1 Integrated Pull-Ups and Pull-Downs ..................................................................... 99
3.2 Output and I/O Signals Planes and States........................................................... 101
3.3 Power Planes for Input Signals .......................................................................... 112
4System Clocks....................................................................................................... 119
5 Functional Description........................................................................................... 123
5.1 DMI-to-PCI Bridge (D30:F0) ............................................................................. 123
5.1.1 PCI Bus Interface .............................................................................. 123
5.1.2 PCI Bridge As an Initiator ................................................................... 123
5.1.2.1 Memory Reads and Writes .................................................... 124
5.1.2.2 I/O Reads and Writes .......................................................... 124
5.1.2.3 Configuration Reads and Writes ............................................ 124
5.1.2.4 Locked Cycles..................................................................... 124
5.1.2.5 Target / Master Aborts ......................................................... 124
5.1.2.6 Secondary Master Latency Timer ........................................... 124
5.1.2.7 Dual Address Cycle (DAC) .................................................... 124
5.1.2.8 Memory and I/O Decode to PCI ............................................. 125
5.1.3 Parity Error Detection and Generation .................................................. 125
5.1.4 PCIRST#.......................................................................................... 126
5.1.5 Peer Cycles ...................................................................................... 126
5.1.6 PCI-to-PCI Bridge Model..................................................................... 127
5.1.7 IDSEL to Device Number Mapping ....................................................... 127
4Datasheet
5.1.8 Standard PCI Bus Configuration Mechanism...........................................127
5.2 PCI Express* Root Ports (D28:F0,F1,F2,F3,F4,F5, F6, F7) .....................................127
5.2.1 Interrupt Generation .......................................................................... 128
5.2.2 Power Management............................................................................128
5.2.2.1 S3/S4/S5 Support ............................................................... 128
5.2.2.2 Resuming from Suspended State ........................................... 129
5.2.2.3 Device Initiated PM_PME Message.......................................... 129
5.2.2.4 SMI/SCI Generation ............................................................. 129
5.2.3 SERR# Generation ............................................................................. 130
5.2.4 Hot-Plug........................................................................................... 130
5.2.4.1 Presence Detection .............................................................. 130
5.2.4.2 Message Generation.............................................................131
5.2.4.3 Attention Button Detection....................................................131
5.2.4.4 SMI/SCI Generation ............................................................. 132
5.3 Gigabit Ethernet Controller (B0:D25:F0) ............................................................. 132
5.3.1 GbE PCI Express* Bus Interface...........................................................134
5.3.1.1 Transaction Layer ................................................................134
5.3.1.2 Data Alignment ................................................................... 134
5.3.1.3 Configuration Request Retry Status........................................134
5.3.2 Error Events and Error Reporting .........................................................135
5.3.2.1 Data Parity Error ................................................................. 135
5.3.2.2 Completion with Unsuccessful Completion Status .....................135
5.3.3 Ethernet Interface .............................................................................135
5.3.3.1 Intel® 5 Series Chipset and Intel® 3400 Series Chipset
82577/82578 PHY Interface .................................................. 135
5.3.4 PCI Power Management...................................................................... 136
5.3.4.1 Wake Up ............................................................................ 136
5.3.5 Configurable LEDs .............................................................................138
5.3.6 Function Level Reset Support (FLR)......................................................138
5.3.6.1 FLR Steps ........................................................................... 139
5.4 LPC Bridge (with System and Management Functions) (D31:F0).............................139
5.4.1 LPC Interface .................................................................................... 139
5.4.1.1 LPC Cycle Types .................................................................. 140
5.4.1.2 Start Field Definition ............................................................ 141
5.4.1.3 Cycle Type / Direction (CYCTYPE + DIR) .................................141
5.4.1.4 Size ................................................................................... 141
5.4.1.5 SYNC ................................................................................. 142
5.4.1.6 SYNC Time-Out ................................................................... 142
5.4.1.7 SYNC Error Indication...........................................................142
5.4.1.8 LFRAME# Usage .................................................................. 142
5.4.1.9 I/O Cycles ..........................................................................143
5.4.1.10 Bus Master Cycles................................................................ 143
5.4.1.11 LPC Power Management ....................................................... 143
5.4.1.12 Configuration and PCH Implications........................................143
5.5 DMA Operation (D31:F0) .................................................................................. 144
5.5.1 Channel Priority................................................................................. 144
5.5.1.1 Fixed Priority ...................................................................... 144
5.5.1.2 Rotating Priority ..................................................................145
5.5.2 Address Compatibility Mode ................................................................ 145
5.5.3 Summary of DMA Transfer Sizes..........................................................145
5.5.3.1 Address Shifting When Programmed for 16-Bit I/O Count
by Words............................................................................ 145
5.5.4 Autoinitialize ..................................................................................... 146
5.5.5 Software Commands ..........................................................................146
5.6 LPC DMA ........................................................................................................147
5.6.1 Asserting DMA Requests .....................................................................147
5.6.2 Abandoning DMA Requests..................................................................148
5.6.3 General Flow of DMA Transfers ............................................................148
5.6.4 Terminal Count.................................................................................. 148
5.6.5 Verify Mode ......................................................................................149
5.6.6 DMA Request De-assertion.................................................................. 149
5.6.7 SYNC Field / LDRQ# Rules ..................................................................150
5.7 8254 Timers (D31:F0) ...................................................................................... 150
5.7.1 Timer Programming ........................................................................... 151
5.7.2 Reading from the Interval Timer .......................................................... 152
5.7.2.1 Simple Read .......................................................................152
5.7.2.2 Counter Latch Command ......................................................152
Datasheet 5
5.7.2.3 Read Back Command........................................................... 152
5.8 8259 Interrupt Controllers (PIC) (D31:F0) .......................................................... 153
5.8.1 Interrupt Handling............................................................................. 154
5.8.1.1 Generating Interrupts .......................................................... 154
5.8.1.2 Acknowledging Interrupts..................................................... 154
5.8.1.3 Hardware/Software Interrupt Sequence ................................. 155
5.8.2 Initialization Command Words (ICWx).................................................. 155
5.8.2.1 ICW1................................................................................. 155
5.8.2.2 ICW2................................................................................. 156
5.8.2.3 ICW3................................................................................. 156
5.8.2.4 ICW4................................................................................. 156
5.8.3 Operation Command Words (OCW)...................................................... 156
5.8.4 Modes of Operation ........................................................................... 156
5.8.4.1 Fully Nested Mode ............................................................... 156
5.8.4.2 Special Fully-Nested Mode .................................................... 157
5.8.4.3 Automatic Rotation Mode (Equal Priority Devices) .................... 157
5.8.4.4 Specific Rotation Mode (Specific Priority) ................................ 157
5.8.4.5 Poll Mode ........................................................................... 157
5.8.4.6 Edge and Level Triggered Mode............................................. 158
5.8.4.7 End of Interrupt (EOI) Operations ......................................... 158
5.8.4.8 Normal End of Interrupt ....................................................... 158
5.8.4.9 Automatic End of Interrupt Mode........................................... 158
5.8.5 Masking Interrupts ............................................................................ 159
5.8.5.1 Masking on an Individual Interrupt Request ............................ 159
5.8.5.2 Special Mask Mode .............................................................. 159
5.8.6 Steering PCI Interrupts ...................................................................... 159
5.9 Advanced Programmable Interrupt Controller (APIC) (D31:F0) .............................. 160
5.9.1 Interrupt Handling............................................................................. 160
5.9.2 Interrupt Mapping ............................................................................. 160
5.9.3 PCI / PCI Express* Message-Based Interrupts ....................................... 161
5.9.4 IOxAPIC Address Remapping .............................................................. 161
5.9.5 External Interrupt Controller Support ................................................... 161
5.10 Serial Interrupt (D31:F0) ................................................................................. 162
5.10.1 Start Frame...................................................................................... 162
5.10.2 Data Frames..................................................................................... 163
5.10.3 Stop Frame ...................................................................................... 163
5.10.4 Specific Interrupts Not Supported Using SERIRQ ................................... 163
5.10.5 Data Frame Format ........................................................................... 164
5.11 Real Time Clock (D31:F0)................................................................................. 165
5.11.1 Update Cycles................................................................................... 165
5.11.2 Interrupts ........................................................................................ 166
5.11.3 Lockable RAM Ranges ........................................................................ 166
5.11.4 Century Rollover ............................................................................... 166
5.11.5 Clearing Battery-Backed RTC RAM ....................................................... 166
5.12 Processor Interface (D31:F0) ............................................................................ 168
5.12.1 Processor Interface Signals and VLW Messages ..................................... 168
5.12.1.1 A20M# (Mask A20) / A20GATE ............................................. 168
5.12.1.2 INIT (Initialization).............................................................. 169
5.12.1.3 FERR# (Numeric Coprocessor Error) ...................................... 169
5.12.1.4 NMI (Non-Maskable Interrupt) .............................................. 170
5.12.1.5 Processor Power Good (PROCPWRGD).................................... 170
5.12.2 Dual-Processor Issues........................................................................ 170
5.12.2.1 Usage Differences ............................................................... 170
5.12.3 Virtual Legacy Wire (VLW) Messages.................................................... 170
5.13 Power Management (D31:F0) ........................................................................... 171
5.13.1 Features .......................................................................................... 171
5.13.2 PCH and System Power States ............................................................ 171
5.13.3 System Power Planes......................................................................... 173
5.13.4 SMI#/SCI Generation ........................................................................ 173
5.13.4.1 PCI Express* SCI ................................................................ 176
5.13.4.2 PCI Express* Hot-Plug ......................................................... 176
5.13.5 C-States .......................................................................................... 176
5.13.6 Dynamic PCI Clock Control (Mobile Only).............................................. 176
5.13.6.1 Conditions for Checking the PCI Clock .................................... 177
5.13.6.2 Conditions for Maintaining the PCI Clock................................. 177
5.13.6.3 Conditions for Stopping the PCI Clock .................................... 177
5.13.6.4 Conditions for Re-Starting the PCI Clock................................. 177
6Datasheet
5.13.6.5 LPC Devices and CLKRUN# ...................................................178
5.13.7 Sleep States .....................................................................................178
5.13.7.1 Sleep State Overview ........................................................... 178
5.13.7.2 Initiating Sleep State ........................................................... 178
5.13.7.3 Exiting Sleep States ............................................................. 179
5.13.7.4 PCI Express* WAKE# Signal and PME Event Message ...............181
5.13.7.5 Sx-G3-Sx, Handling Power Failures ........................................181
5.13.8 Event Input Signals and Their Usage .................................................... 181
5.13.8.1 PWRBTN# (Power Button) .................................................... 182
5.13.8.2 RI# (Ring Indicator) ............................................................183
5.13.8.3 PME# (PCI Power Management Event).................................... 183
5.13.8.4 SYS_RESET# Signal.............................................................183
5.13.8.5 THRMTRIP# Signal............................................................... 183
5.13.9 ALT Access Mode ...............................................................................184
5.13.9.1 Write Only Registers with Read Paths in ALT Access Mode ......... 185
5.13.9.2 PIC Reserved Bits ................................................................187
5.13.9.3 Read Only Registers with Write Paths in ALT Access Mode ......... 187
5.13.10 System Power Supplies, Planes, and Signals..........................................187
5.13.10.1 Power Plane Control with SLP_S3#,
SLP_S4#, SLP_S5#, SLP_M# and SLP_LAN# .......................... 187
5.13.10.2 SLP_S4# and Suspend-To-RAM Sequencing ............................ 188
5.13.10.3 PWROK Signal.....................................................................188
5.13.10.4 BATLOW# (Battery Low) (Mobile Only) ...................................188
5.13.10.5 SLP_LAN# Pin Behavior ........................................................189
5.13.10.6 RTCRST# and SRTCRST# .....................................................189
5.13.11 Clock Generators ...............................................................................189
5.13.12 Legacy Power Management Theory of Operation .................................... 190
5.13.12.1 APM Power Management (Desktop Only).................................190
5.13.12.2 Mobile APM Power Management (Mobile Only) ......................... 190
5.13.13 Reset Behavior ..................................................................................190
5.14 System Management (D31:F0) .......................................................................... 192
5.14.1 Theory of Operation ...........................................................................193
5.14.1.1 Detecting a System Lockup ...................................................193
5.14.1.2 Handling an Intruder............................................................193
5.14.1.3 Detecting Improper Flash Programming ..................................193
5.14.1.4 Heartbeat and Event Reporting using SMLink/SMBus ................193
5.14.2 TCO Modes ....................................................................................... 194
5.14.2.1 TCO Legacy/Compatible Mode ...............................................194
5.14.2.2 Advanced TCO Mode ............................................................195
5.15 General Purpose I/O (D31:F0) ...........................................................................197
5.15.1 Power Wells ...................................................................................... 197
5.15.2 SMI# SCI and NMI Routing .................................................................197
5.15.3 Triggering......................................................................................... 197
5.15.4 GPIO Registers Lockdown ...................................................................197
5.15.5 Serial POST Codes Over GPIO.............................................................. 198
5.15.5.1 Theory of operation .............................................................198
5.15.5.2 Serial Message Format ......................................................... 199
5.16 SATA Host Controller (D31:F2, F5)..................................................................... 200
5.16.1 SATA Feature Support ........................................................................ 201
5.16.2 Theory of Operation ...........................................................................202
5.16.2.1 Standard ATA Emulation .......................................................202
5.16.2.2 48-Bit LBA Operation ...........................................................202
5.16.3 SATA Swap Bay Support ..................................................................... 202
5.16.4 Hot Plug Operation............................................................................. 202
5.16.4.1 Low Power Device Presence Detection ....................................202
5.16.5 Function Level Reset Support (FLR)...................................................... 203
5.16.5.1 FLR Steps ........................................................................... 203
5.16.6 Intel® Rapid Storage Technology Configuration......................................203
5.16.6.1 Intel® Rapid Storage Manager RAID Option ROM .....................204
5.16.7 Power Management Operation .............................................................204
5.16.7.1 Power State Mappings .......................................................... 204
5.16.7.2 Power State Transitions ........................................................205
5.16.7.3 SMI Trapping (APM) ............................................................. 206
5.16.8 SATA Device Presence........................................................................ 206
5.16.9 SATA LED ......................................................................................... 207
5.16.10 AHCI Operation .................................................................................207
5.16.11 SGPIO Signals ................................................................................... 207
Datasheet 7
5.16.11.1 Mechanism......................................................................... 207
5.16.11.2 Message Format.................................................................. 208
5.16.11.3 LED Message Type .............................................................. 209
5.16.11.4 SGPIO Waveform ................................................................ 210
5.16.12 External SATA................................................................................... 211
5.17 High Precision Event Timers.............................................................................. 211
5.17.1 Timer Accuracy ................................................................................. 211
5.17.2 Interrupt Mapping ............................................................................. 212
5.17.3 Periodic vs. Non-Periodic Modes .......................................................... 212
5.17.4 Enabling the Timers........................................................................... 213
5.17.5 Interrupt Levels ................................................................................ 213
5.17.6 Handling Interrupts ........................................................................... 214
5.17.7 Issues Related to 64-Bit Timers with 32-Bit Processors........................... 214
5.18 USB EHCI Host Controllers (D29:F0 and D26:F0)................................................. 215
5.18.1 EHC Initialization............................................................................... 215
5.18.1.1 BIOS Initialization ............................................................... 215
5.18.1.2 Driver Initialization.............................................................. 215
5.18.1.3 EHC Resets ........................................................................ 215
5.18.2 Data Structures in Main Memory ......................................................... 215
5.18.3 USB 2.0 Enhanced Host Controller DMA................................................ 216
5.18.4 Data Encoding and Bit Stuffing............................................................ 216
5.18.5 Packet Formats ................................................................................. 216
5.18.6 USB 2.0 Interrupts and Error Conditions............................................... 216
5.18.6.1 Aborts on USB 2.0-Initiated Memory Reads ............................ 217
5.18.7 USB 2.0 Power Management ............................................................... 217
5.18.7.1 Pause Feature..................................................................... 217
5.18.7.2 Suspend Feature................................................................. 217
5.18.7.3 ACPI Device States.............................................................. 218
5.18.7.4 ACPI System States............................................................. 218
5.18.8 USB 2.0 Legacy Keyboard Operation.................................................... 218
5.18.9 USB 2.0 Based Debug Port ................................................................. 219
5.18.9.1 Theory of Operation............................................................ 219
5.18.10 EHCI Caching ................................................................................... 224
5.18.11 USB Pre-Fetch Based Pause ................................................................ 224
5.18.12 Function Level Reset Support (FLR) ..................................................... 224
5.18.12.1 FLR Steps .......................................................................... 224
5.18.13 USB Overcurrent Protection ................................................................ 225
5.19 Integrated USB 2.0 Rate Matching Hub .............................................................. 226
5.19.1 Overview ......................................................................................... 226
5.19.2 Architecture ..................................................................................... 226
5.20 SMBus Controller (D31:F3)............................................................................... 227
5.20.1 Host Controller ................................................................................. 227
5.20.1.1 Command Protocols............................................................. 228
5.20.2 Bus Arbitration.................................................................................. 231
5.20.3 Bus Timing ....................................................................................... 232
5.20.3.1 Clock Stretching.................................................................. 232
5.20.3.2 Bus Time Out (The PCH as SMBus Master).............................. 232
5.20.4 Interrupts / SMI#.............................................................................. 232
5.20.5 SMBALERT# ..................................................................................... 233
5.20.6 SMBus CRC Generation and Checking................................................... 233
5.20.7 SMBus Slave Interface ....................................................................... 234
5.20.7.1 Format of Slave Write Cycle.................................................. 234
5.20.7.2 Format of Read Command .................................................... 236
5.20.7.3 Slave Read of RTC Time Bytes .............................................. 238
5.20.7.4 Format of Host Notify Command ........................................... 238
5.21 Thermal Management ...................................................................................... 240
5.21.1 Thermal Sensor ................................................................................ 240
5.21.1.1 Internal Thermal Sensor Operation ........................................ 240
5.21.2 Thermal Reporting Over System Management Link 1 Interface (SMLink1) . 241
5.21.2.1 Supported Addresses ........................................................... 242
5.21.2.2 I2C Write Commands to the Intel® ME ................................... 243
5.21.2.3 Block Read Command .......................................................... 243
5.21.2.4 Read Data Format ............................................................... 245
5.21.2.5 Thermal Data Update Rate ................................................... 246
5.21.2.6 Temperature Comparator and Alert ....................................... 247
5.21.2.7 BIOS Set Up....................................................................... 248
5.21.2.8 SMBus Rules....................................................................... 249
8Datasheet
5.21.2.9 Case for Considerations ........................................................250
5.22 Intel® High Definition Audio Overview (D27:F0)................................................... 252
5.22.1 Intel® High Definition Audio Docking (Mobile Only) ................................252
5.22.1.1 Dock Sequence ................................................................... 252
5.22.1.2 Exiting D3/CRST# when Docked ............................................ 253
5.22.1.3 Cold Boot/Resume from S3 When Docked ............................... 254
5.22.1.4 Undock Sequence ................................................................ 254
5.22.1.5 Normal Undock.................................................................... 254
5.22.1.6 Surprise Undock .................................................................. 255
5.22.1.7 Interaction Between Dock/Undock and Power Management
States ................................................................................ 255
5.22.1.8 Relationship between HDA_DOCK_RST# and HDA_RST# .......... 255
5.23 Intel® Active Management Technology 6.0 (Intel® AMT) ....................................... 256
5.23.1 Intel® AMT6.x and ASF 2.0 Features ....................................................257
5.23.2 Intel® AMT Requirements ...................................................................257
5.24 Serial Peripheral Interface (SPI) ........................................................................ 258
5.24.1 SPI Supported Feature Overview .........................................................258
5.24.1.1 Non-Descriptor Mode ........................................................... 258
5.24.1.2 Descriptor Mode ..................................................................258
5.24.1.3 Device Partitioning............................................................... 260
5.24.2 Flash Descriptor ................................................................................260
5.24.2.1 Descriptor Master Region...................................................... 262
5.24.3 Flash Access ..................................................................................... 263
5.24.3.1 Direct Access Security ..........................................................263
5.24.3.2 Register Access Security.......................................................263
5.24.4 Serial Flash Device Compatibility Requirements ..................................... 264
5.24.4.1 PCH SPI Based BIOS Requirements ........................................264
5.24.4.2 Integrated LAN Firmware SPI Flash Requirements .................... 264
5.24.4.3 Intel® Management Engine Firmware SPI Flash Requirements ... 265
5.24.4.4 Hardware Sequencing Requirements ...................................... 265
5.24.5 Multiple Page Write Usage Model..........................................................266
5.24.5.1 Soft Flash Protection ............................................................266
5.24.5.2 BIOS Range Write Protection................................................. 267
5.24.5.3 SMI# Based Global Write Protection ....................................... 267
5.24.6 Flash Device Configurations ................................................................267
5.24.7 SPI Flash Device Recommended Pinout................................................. 267
5.24.8 Serial Flash Device Package ................................................................268
5.24.8.1 Common Footprint Usage Model ............................................ 268
5.24.8.2 Serial Flash Device Package Recommendations........................ 268
5.25 Intel® Quiet System Technology (Intel® QST) (Desktop Only) ............................... 269
5.25.1 PWM Outputs ....................................................................................269
5.25.2 TACH Inputs ..................................................................................... 269
5.26 Feature Capability Mechanism ........................................................................... 269
5.27 PCH Display Interfaces and Intel® Flexible Display Interconnect............................. 270
5.27.1 Analog Display Interface Characteristics................................................ 270
5.27.1.1 Integrated RAMDAC .............................................................271
5.27.1.2 DDC (Display Data Channel) .................................................271
5.27.2 Digital Display Interfaces .................................................................... 271
5.27.2.1 LVDS (Mobile only) ..............................................................271
5.27.2.2 LVDS Pair States .................................................................272
5.27.2.3 Single Channel versus Dual Channel Mode .............................. 273
5.27.2.4 Panel Power Sequencing .......................................................273
5.27.2.5 LVDS DDC ..........................................................................274
5.27.2.6 High Definition Multimedia Interface....................................... 274
5.27.2.7 Digital Video Interface (DVI) ................................................. 275
5.27.2.8 Display Port* ...................................................................... 275
5.27.2.9 Embedded DisplayPort.......................................................... 275
5.27.2.10 DisplayPort Aux Channel.......................................................276
5.27.2.11 DisplayPort Hot-Plug Detect (HPD) ......................................... 276
5.27.2.12 Integrated Audio over HDMI and DisplayPort ........................... 276
5.27.2.13 Serial Digital Video Out (SDVO) ............................................. 276
5.27.2.14 Control Bus......................................................................... 277
5.27.3 Mapping of Digital Display Interface Signals ..........................................278
5.27.4 Multiple Display Configurations ............................................................279
5.27.5 High-bandwidth Digital Content Protection (HDCP) ................................. 279
5.27.6 Intel® Flexible Display Interconnect ..................................................... 280
5.28 Intel® Virtualization Technology ........................................................................ 280
Datasheet 9
5.28.1 Intel® VT-d Objectives....................................................................... 280
5.28.2 Intel® VT-d Features Supported .......................................................... 280
5.28.3 Support for Function Level Reset (FLR) in Intel® 5 Series
Chipset and Intel® 3400 Series Chipset................................................ 281
5.28.4 Virtualization Support for PCH’s IOxAPIC .............................................. 281
5.28.5 Virtualization Support for High Precision Event Timer (HPET)................... 281
5.29 Intel® 5 Series Chipset and Intel® 3400 Series Chipset Platform Clocks.................. 282
5.29.1 Platform Clocking Requirements .......................................................... 282
6 Ballout Definition................................................................................................... 283
6.1 PCH Desktop Ballout ........................................................................................ 283
6.2 PCH Ballout Mobile Ballout ................................................................................ 294
6.3 PCH Ballout Small Form Factor Ballout ............................................................... 306
7 Package Information ............................................................................................. 319
7.1 PCH package (Desktop Only) ............................................................................ 319
7.2 PCH package (Mobile Only)............................................................................... 321
7.3 PCH package (Mobile SFF Only)......................................................................... 323
8 Electrical Characteristics ....................................................................................... 325
8.1 Thermal Specifications ..................................................................................... 325
8.1.1 Desktop Storage Specifications and Thermal Design Power (TDP) ............ 325
8.1.2 Mobile Storage Specifications and Thermal Design Power (TDP)............... 325
8.2 Absolute Maximum and Minimum Ratings ........................................................... 326
8.3 Intel® 5 Series Chipset and Intel® 3400 Series Chipset Power Supply range ........... 327
8.4 General DC Characteristics ............................................................................... 327
8.5 Display DC Characteristics ................................................................................ 340
8.6 AC Characteristics ........................................................................................... 342
8.7 Power Sequencing and Reset Signal Timings ....................................................... 360
8.8 Power Management Timing Diagrams................................................................. 363
8.9 AC Timing Diagrams ........................................................................................ 366
9 Register and Memory Mapping............................................................................... 377
9.1 PCI Devices and Functions................................................................................ 378
9.2 PCI Configuration Map ..................................................................................... 379
9.3 I/O Map ......................................................................................................... 379
9.3.1 Fixed I/O Address Ranges .................................................................. 379
9.3.2 Variable I/O Decode Ranges ............................................................... 382
9.4 Memory Map................................................................................................... 383
9.4.1 Boot-Block Update Scheme................................................................. 385
10 Chipset Configuration Registers............................................................................. 387
10.1 Chipset Configuration Registers (Memory Space) ................................................. 387
10.1.1 V0CTL—Virtual Channel 0 Resource Control Register .............................. 390
10.1.2 V0STS—Virtual Channel 0 Resource Status Register ............................... 390
10.1.3 V1CTL—Virtual Channel 1 Resource Control Register .............................. 391
10.1.4 V1STS—Virtual Channel 1 Resource Status Register ............................... 391
10.1.5 CIR0—Chipset Initialization Register 0.................................................. 391
10.1.6 CIR1—Chipset Initialization Register 1.................................................. 392
10.1.7 REC—Root Error Command Register .................................................... 392
10.1.8 ILCL—Internal Link Capabilities List Register ......................................... 392
10.1.9 LCAP—Link Capabilities Register .......................................................... 393
10.1.10 LCTL—Link Control Register ................................................................ 393
10.1.11 LSTS—Link Status Register................................................................. 394
10.1.12 BCR—Backbone Configuration Register................................................. 394
10.1.13 RPC—Root Port Configuration Register ................................................. 394
10.1.14 DMIC—DMI Control Register ............................................................... 396
10.1.15 RPFN—Root Port Function Number and Hide for PCI
Express* Root Ports Register .............................................................. 396
10.1.16 FLRSTAT—FLR Pending Status Register ................................................ 397
10.1.17 CIR5—Chipset Initialization Register 5.................................................. 398
10.1.18 TRSR—Trap Status Register................................................................ 398
10.1.19 TRCR—Trapped Cycle Register ............................................................ 398
10.1.20 TWDR—Trapped Write Data Register.................................................... 399
10.1.21 IOTRn—I/O Trap Register (0–3) .......................................................... 399
10.1.22 DMC—DMI Miscellaneous Control Register ............................................ 400
10.1.23 CIR6—Chipset Initialization Register 6.................................................. 400
10.1.24 DMC2—DMI Miscellaneous Control Register 2 ........................................ 400
10 Datasheet
10.1.25 TCTL—TCO Configuration Register........................................................ 401
10.1.26 D31IP—Device 31 Interrupt Pin Register ............................................... 402
10.1.27 D30IP—Device 30 Interrupt Pin Register ............................................... 403
10.1.28 D29IP—Device 29 Interrupt Pin Register ............................................... 403
10.1.29 D28IP—Device 28 Interrupt Pin Register ............................................... 404
10.1.30 D27IP—Device 27 Interrupt Pin Register ............................................... 405
10.1.31 D26IP—Device 26 Interrupt Pin Register ............................................... 406
10.1.32 D25IP—Device 25 Interrupt Pin Register ............................................... 406
10.1.33 D22IP—Device 22 Interrupt Pin Register ............................................... 407
10.1.34 D31IR—Device 31 Interrupt Route Register...........................................407
10.1.35 D30IR—Device 30 Interrupt Route Register...........................................408
10.1.36 D29IR—Device 29 Interrupt Route Register...........................................409
10.1.37 D28IR—Device 28 Interrupt Route Register...........................................410
10.1.38 D27IR—Device 27 Interrupt Route Register...........................................411
10.1.39 D26IR—Device 26 Interrupt Route Register...........................................412
10.1.40 D25IR—Device 25 Interrupt Route Register...........................................413
10.1.41 D24IR—Device 24 Interrupt Route Register...........................................414
10.1.42 D22IR—Device 22 Interrupt Route Register...........................................415
10.1.43 OIC—Other Interrupt Control Register .................................................. 416
10.1.44 PRSTS—Power and Reset Status .......................................................... 417
10.1.45 CIR7—Chipset Initalization Register 7................................................... 417
10.1.46 CIR8—Chipset Initialization Register 8 ..................................................418
10.1.47 CIR9—Chipset Initialization Register 9 ..................................................418
10.1.48 CIR10—Chipset Initialization Register 10 .............................................. 418
10.1.49 CIR13—Chipset Initialization Register 13 .............................................. 418
10.1.50 CIR14—Chipset Initialization Register 14 .............................................. 418
10.1.51 CIR15—Chipset Initialization Register 15 .............................................. 419
10.1.52 CIR16—Chipset Initialization Register 16 .............................................. 419
10.1.53 CIR17—Chipset Initialization Register 17 .............................................. 419
10.1.54 CIR18—Chipset Initialization Register 18 .............................................. 419
10.1.55 CIR19—Chipset Initialization Register 19 .............................................. 419
10.1.56 CIR20—Chipset Initialization Register 20 .............................................. 420
10.1.57 CIR21—Chipset Initialization Register 21 .............................................. 420
10.1.58 CIR22—Chipset Initialization Register 22 .............................................. 420
10.1.59 RC—RTC Configuration Register........................................................... 421
10.1.60 HPTC—High Precision Timer Configuration Register ................................421
10.1.61 GCS—General Control and Status Register ............................................ 422
10.1.62 BUC—Backed Up Control Register ........................................................424
10.1.63 FD—Function Disable Register ............................................................. 425
10.1.64 CG—Clock Gating Register .................................................................. 427
10.1.65 FDSW—Function Disable SUS Well Register ...........................................428
10.1.66 FD2—Function Disable 2 Register......................................................... 428
10.1.67 MISCCTL—Miscellaneous Control Register .............................................429
10.1.68 USBOCM1—Overcurrent MAP Register 1................................................430
10.1.69 USBOCM2—Overcurrent MAP Register 2................................................431
10.1.70 RMHWKCTL—Rate Matching Hub Wake Control Register .......................... 432
11 PCI-to-PCI Bridge Registers (D30:F0).................................................................... 435
11.1 PCI Configuration Registers (D30:F0) .................................................................435
11.1.1 VID—Vendor Identification Register (PCI-PCI—D30:F0) .......................... 436
11.1.2 DID—Device Identification Register (PCI-PCI—D30:F0) ........................... 436
11.1.3 PCICMD—PCI Command Register (PCI-PCI—D30:F0)..............................436
11.1.4 PSTS—PCI Status Register (PCI-PCI—D30:F0) .......................................437
11.1.5 RID—Revision Identification Register (PCI-PCI—D30:F0)......................... 439
11.1.6 CC—Class Code Register (PCI-PCI—D30:F0)..........................................439
11.1.7 PMLT—Primary Master Latency Timer Register
(PCI-PCI—D30:F0)............................................................................. 440
11.1.8 HEADTYP—Header Type Register (PCI-PCI—D30:F0) .............................. 440
11.1.9 BNUM—Bus Number Register (PCI-PCI—D30:F0) ...................................440
11.1.10 SMLT—Secondary Master Latency Timer Register
(PCI-PCI—D30:F0)............................................................................. 441
11.1.11 IOBASE_LIMIT—I/O Base and Limit Register
(PCI-PCI—D30:F0)............................................................................. 441
11.1.12 SECSTS—Secondary Status Register (PCI-PCI—D30:F0) ......................... 442
11.1.13 MEMBASE_LIMIT—Memory Base and Limit Register
(PCI-PCI—D30:F0)............................................................................. 443
Datasheet 11
11.1.14 PREF_MEM_BASE_LIMIT—Prefetchable Memory Base
and Limit Register (PCI-PCI—D30:F0) .................................................. 443
11.1.15 PMBU32—Prefetchable Memory Base Upper 32 Bits
Register (PCI-PCI—D30:F0)................................................................ 444
11.1.16 PMLU32—Prefetchable Memory Limit Upper 32 Bits
Register (PCI-PCI—D30:F0)................................................................ 444
11.1.17 CAPP—Capability List Pointer Register (PCI-PCI—D30:F0) ....................... 444
11.1.18 INTR—Interrupt Information Register (PCI-PCI—D30:F0)........................ 444
11.1.19 BCTRL—Bridge Control Register (PCI-PCI—D30:F0) ............................... 445
11.1.20 SPDH—Secondary PCI Device Hiding Register
(PCI-PCI—D30:F0) ............................................................................ 447
11.1.21 DTC—Delayed Transaction Control Register
(PCI-PCI—D30:F0) ............................................................................ 447
11.1.22 BPS—Bridge Proprietary Status Register
(PCI-PCI—D30:F0) ............................................................................ 449
11.1.23 BPC—Bridge Policy Configuration Register
(PCI-PCI—D30:F0) ............................................................................ 450
11.1.24 SVCAP—Subsystem Vendor Capability Register
(PCI-PCI—D30:F0) ............................................................................ 451
11.1.25 SVID—Subsystem Vendor IDs Register (PCI-PCI—D30:F0) ..................... 451
12 Gigabit LAN Configuration Registers ...................................................................... 453
12.1 Gigabit LAN Configuration Registers
(Gigabit LAN—D25:F0)..................................................................................... 453
12.1.1 VID—Vendor Identification Register
(Gigabit LAN—D25:F0)....................................................................... 454
12.1.2 DID—Device Identification Register
(Gigabit LAN—D25:F0)....................................................................... 454
12.1.3 PCICMD—PCI Command Register
(Gigabit LAN—D25:F0)....................................................................... 455
12.1.4 PCISTS—PCI Status Register
(Gigabit LAN—D25:F0)....................................................................... 456
12.1.5 RID—Revision Identification Register
(Gigabit LAN—D25:F0)....................................................................... 457
12.1.6 CC—Class Code Register
(Gigabit LAN—D25:F0)....................................................................... 457
12.1.7 CLS—Cache Line Size Register
(Gigabit LAN—D25:F0)....................................................................... 457
12.1.8 PLT—Primary Latency Timer Register
(Gigabit LAN—D25:F0)....................................................................... 457
12.1.9 HT—Header Type Register
(Gigabit LAN—D25:F0)....................................................................... 457
12.1.10 MBARA—Memory Base Address Register A
(Gigabit LAN—D25:F0)....................................................................... 458
12.1.11 MBARB—Memory Base Address Register B
(Gigabit LAN—D25:F0)....................................................................... 458
12.1.12 MBARC—Memory Base Address Register C
(Gigabit LAN—D25:F0)....................................................................... 459
12.1.13 SVID—Subsystem Vendor ID Register
(Gigabit LAN—D25:F0)....................................................................... 459
12.1.14 SID—Subsystem ID Register
(Gigabit LAN—D25:F0)....................................................................... 459
12.1.15 ERBA—Expansion ROM Base Address Register
(Gigabit LAN—D25:F0)....................................................................... 459
12.1.16 CAPP—Capabilities List Pointer Register
(Gigabit LAN—D25:F0)....................................................................... 460
12.1.17 INTR—Interrupt Information Register
(Gigabit LAN—D25:F0)....................................................................... 460
12.1.18 MLMG—Maximum Latency/Minimum Grant Register
(Gigabit LAN—D25:F0)....................................................................... 460
12.1.19 CLIST 1—Capabilities List Register 1
(Gigabit LAN—D25:F0)....................................................................... 460
12.1.20 PMC—PCI Power Management Capabilities Register
(Gigabit LAN—D25:F0)....................................................................... 461
12.1.21 PMCS—PCI Power Management Control and Status
Register (Gigabit LAN—D25:F0) .......................................................... 462
12 Datasheet
12.1.22 DR—Data Register
(Gigabit LAN—D25:F0) ....................................................................... 463
12.1.23 CLIST 2—Capabilities List Register 2
(Gigabit LAN—D25:F0) ....................................................................... 463
12.1.24 MCTL—Message Control Register
(Gigabit LAN—D25:F0) ....................................................................... 463
12.1.25 MADDL—Message Address Low Register
(Gigabit LAN—D25:F0) ....................................................................... 464
12.1.26 MADDH—Message Address High Register
(Gigabit LAN—D25:F0) ....................................................................... 464
12.1.27 MDAT—Message Data Register
(Gigabit LAN—D25:F0) ....................................................................... 464
12.1.28 FLRCAP—Function Level Reset Capability
(Gigabit LAN—D25:F0) ....................................................................... 464
12.1.29 FLRCLV—Function Level Reset Capability Length and Version
(Gigabit LAN—D25:F0) ....................................................................... 465
12.1.30 DEVCTRL—Device Control (Gigabit LAN—D25:F0) .................................. 465
13 LPC Interface Bridge Registers (D31:F0) ............................................................... 467
13.1 PCI Configuration Registers (LPC I/F—D31:F0) .................................................... 467
13.1.1 VID—Vendor Identification Register (LPC I/F—D31:F0) ........................... 468
13.1.2 DID—Device Identification Register (LPC I/F—D31:F0)............................468
13.1.3 PCICMD—PCI COMMAND Register (LPC I/F—D31:F0).............................. 469
13.1.4 PCISTS—PCI Status Register (LPC I/F—D31:F0) .................................... 470
13.1.5 RID—Revision Identification Register (LPC I/F—D31:F0) ......................... 471
13.1.6 PI—Programming Interface Register (LPC I/F—D31:F0) .......................... 471
13.1.7 SCC—Sub Class Code Register (LPC I/F—D31:F0) ..................................471
13.1.8 BCC—Base Class Code Register (LPC I/F—D31:F0).................................471
13.1.9 PLT—Primary Latency Timer Register (LPC I/F—D31:F0) ......................... 471
13.1.10 HEADTYP—Header Type Register (LPC I/F—D31:F0) ............................... 472
13.1.11 SS—Sub System Identifiers Register (LPC I/F—D31:F0)..........................472
13.1.12 CAPP—Capability List Pointer Register (LPC I/F—D31:F0) ........................ 472
13.1.13 PMBASE—ACPI Base Address Register (LPC I/F—D31:F0)........................472
13.1.14 ACPI_CNTL—ACPI Control Register (LPC I/F—D31:F0) ............................473
13.1.15 GPIOBASE—GPIO Base Address Register
(LPC I/F—D31:F0) ............................................................................. 473
13.1.16 GC—GPIO Control Register (LPC I/F—D31:F0) .......................................474
13.1.17 PIRQ[n]_ROUT—PIRQ[A,B,C,D] Routing Control Register
(LPC I/F—D31:F0) ............................................................................. 475
13.1.18 SIRQ_CNTL—Serial IRQ Control Register
(LPC I/F—D31:F0) ............................................................................. 476
13.1.19 PIRQ[n]_ROUT—PIRQ[E,F,G,H] Routing Control Register
(LPC I/F—D31:F0) ............................................................................. 477
13.1.20 LPC_IBDF—IOxAPIC Bus:Device:Function Register
(LPC I/F—D31:F0) ............................................................................. 477
13.1.21 LPC_HnBDF—HPET n Bus:Device:Function Register
(LPC I/F—D31:F0) ............................................................................. 478
13.1.22 LPC_I/O_DEC—I/O Decode Ranges Register
(LPC I/F—D31:F0) ............................................................................. 479
13.1.23 LPC_EN—LPC I/F Enables Register (LPC I/F—D31:F0) ............................. 480
13.1.24 GEN1_DEC—LPC I/F Generic Decode Range 1 Register
(LPC I/F—D31:F0) ............................................................................. 481
13.1.25 GEN2_DEC—LPC I/F Generic Decode Range 2 Register
(LPC I/F—D31:F0) ............................................................................. 481
13.1.26 GEN3_DEC—LPC I/F Generic Decode Range 3 Register
(LPC I/F—D31:F0) ............................................................................. 482
13.1.27 GEN4_DEC—LPC I/F Generic Decode Range 4 Register
(LPC I/F—D31:F0) ............................................................................. 482
13.1.28 ULKMC—USB Legacy Keyboard / Mouse Control
Register (LPC I/F—D31:F0) ................................................................ 483
13.1.29 LGMR—LPC I/F Generic Memory Range Register
(LPC I/F—D31:F0) ............................................................................. 484
13.1.30 FWH_SEL1—Firmware Hub Select 1 Register
(LPC I/F—D31:F0) ............................................................................. 485
13.1.31 FWH_SEL2—Firmware Hub Select 2 Register
(LPC I/F—D31:F0) ............................................................................. 486
Datasheet 13
13.1.32 FWH_DEC_EN1—Firmware Hub Decode Enable
Register (LPC I/F—D31:F0) ................................................................ 487
13.1.33 BIOS_CNTL—BIOS Control Register
(LPC I/F—D31:F0)............................................................................. 489
13.1.34 FDCAP—Feature Detection Capability ID
Register (LPC I/F—D31:F0)................................................................ 490
13.1.35 FDLEN—Feature Detection Capability Length
Register (LPC I/F—D31:F0)................................................................ 490
13.1.36 FDVER—Feature Detection Version
Register (LPC I/F—D31:F0)................................................................ 490
13.1.37 FDVCT—Feature Vector Register
(LPC I/F—D31:F0)............................................................................. 491
13.1.38 RCBA—Root Complex Base Address Register
(LPC I/F—D31:F0)............................................................................. 491
13.2 DMA I/O Registers........................................................................................... 492
13.2.1 DMABASE_CA—DMA Base and Current Address Registers ....................... 493
13.2.2 DMABASE_CC—DMA Base and Current Count Registers .......................... 494
13.2.3 DMAMEM_LP—DMA Memory Low Page Registers.................................... 494
13.2.4 DMACMD—DMA Command Register ..................................................... 495
13.2.5 DMASTA—DMA Status Register ........................................................... 495
13.2.6 DMA_WRSMSK—DMA Write Single Mask Register .................................. 496
13.2.7 DMACH_MODE—DMA Channel Mode Register ........................................ 497
13.2.8 DMA Clear Byte Pointer Register.......................................................... 498
13.2.9 DMA Master Clear Register ................................................................. 498
13.2.10 DMA_CLMSK—DMA Clear Mask Register ............................................... 498
13.2.11 DMA_WRMSK—DMA Write All Mask Register ......................................... 499
13.3 Timer I/O Registers ......................................................................................... 499
13.3.1 TCW—Timer Control Word Register...................................................... 500
13.3.2 SBYTE_FMT—Interval Timer Status Byte Format Register ....................... 502
13.3.3 Counter Access Ports Register............................................................. 503
13.4 8259 Interrupt Controller (PIC) Registers ........................................................... 503
13.4.1 Interrupt Controller I/O MAP............................................................... 503
13.4.2 ICW1—Initialization Command Word 1 Register..................................... 504
13.4.3 ICW2—Initialization Command Word 2 Register..................................... 505
13.4.4 ICW3—Master Controller Initialization Command
Word 3 Register ................................................................................ 505
13.4.5 ICW3—Slave Controller Initialization Command
Word 3 Register ................................................................................ 506
13.4.6 ICW4—Initialization Command Word 4 Register..................................... 506
13.4.7 OCW1—Operational Control Word 1 (Interrupt Mask)
Register ........................................................................................... 507
13.4.8 OCW2—Operational Control Word 2 Register ......................................... 507
13.4.9 OCW3—Operational Control Word 3 Register ......................................... 508
13.4.10 ELCR1—Master Controller Edge/Level Triggered Register ........................ 509
13.4.11 ELCR2—Slave Controller Edge/Level Triggered Register .......................... 510
13.5 Advanced Programmable Interrupt Controller (APIC)............................................ 511
13.5.1 APIC Register Map............................................................................. 511
13.5.2 IND—Index Register .......................................................................... 511
13.5.3 DAT—Data Register ........................................................................... 512
13.5.4 EOIR—EOI Register ........................................................................... 512
13.5.5 ID—Identification Register .................................................................. 513
13.5.6 VER—Version Register ....................................................................... 513
13.5.7 REDIR_TBL—Redirection Table ............................................................ 514
13.6 Real Time Clock Registers................................................................................. 516
13.6.1 I/O Register Address Map................................................................... 516
13.6.2 Indexed Registers ............................................................................. 517
13.6.2.1 RTC_REGA—Register A ........................................................ 518
13.6.2.2 RTC_REGB—Register B (General Configuration)....................... 519
13.6.2.3 RTC_REGC—Register C (Flag Register)................................... 520
13.6.2.4 RTC_REGD—Register D (Flag Register) .................................. 520
13.7 Processor Interface Registers ............................................................................ 521
13.7.1 NMI_SC—NMI Status and Control Register............................................ 521
13.7.2 NMI_EN—NMI Enable (and Real Time Clock Index)
Register ........................................................................................... 522
13.7.3 PORT92—Fast A20 and Init Register .................................................... 522
13.7.4 COPROC_ERR—Coprocessor Error Register ........................................... 522
13.7.5 RST_CNT—Reset Control Register........................................................ 523
14 Datasheet
13.8 Power Management Registers (PM—D31:F0) .......................................................524
13.8.1 Power Management PCI Configuration Registers
(PM—D31:F0) ................................................................................... 524
13.8.1.1 GEN_PMCON_1—General PM Configuration 1 Register
(PM—D31:F0) ..................................................................... 524
13.8.1.2 GEN_PMCON_2—General PM Configuration 2 Register
(PM—D31:F0) ..................................................................... 525
13.8.1.3 GEN_PMCON_3—General PM Configuration 3 Register
(PM—D31:F0) ..................................................................... 527
13.8.1.4 GEN_PMCON_LOCK—General Power Management Configuration
Lock Register ...................................................................... 529
13.8.1.5 Chipset Initialization Register 4 (PM—D31:F0) ......................... 530
13.8.1.6 BM_BREAK_EN Register (PM—D31:F0) ................................... 530
13.8.1.7 PMIR—Power Management Initialization Register (PM—D31:F0) . 531
13.8.1.8 GPIO_ROUT—GPIO Routing Control Register
(PM—D31:F0) ..................................................................... 531
13.8.2 APM I/O Decode ................................................................................ 531
13.8.2.1 APM_CNT—Advanced Power Management Control Port Register . 532
13.8.2.2 APM_STS—Advanced Power Management Status Port Register... 532
13.8.3 Power Management I/O Registers ........................................................ 532
13.8.3.1 PM1_STS—Power Management 1 Status Register ..................... 533
13.8.3.2 PM1_EN—Power Management 1 Enable Register ......................536
13.8.3.3 PM1_CNT—Power Management 1 Control Register.................... 537
13.8.3.4 PM1_TMR—Power Management 1 Timer Register ..................... 538
13.8.3.5 PM1_TMR—Power Management 1 Timer Register ..................... 538
13.8.3.6 GPE0_STS—General Purpose Event 0 Status Register ............... 539
13.8.3.7 GPE0_EN—General Purpose Event 0 Enables Register ............... 541
13.8.3.8 SMI_EN—SMI Control and Enable Register .............................. 543
13.8.3.9 SMI_STS—SMI Status Register .............................................. 545
13.8.3.10 ALT_GP_SMI_EN—Alternate GPI SMI Enable Register ...............547
13.8.3.11 ALT_GP_SMI_STS—Alternate GPI SMI Status Register .............. 548
13.8.3.12 UPRWC—USB Per-Port Registers Write Control.........................548
13.8.3.13 GPE_CNTL—General Purpose Control Register ......................... 549
13.8.3.14 DEVACT_STS—Device Activity Status Register .........................550
13.8.3.15 PM2_CNT—Power Management 2 Control Register.................... 550
13.9 System Management TCO Registers ................................................................... 551
13.9.1 TCO_RLD—TCO Timer Reload and Current Value Register ....................... 551
13.9.2 TCO_DAT_IN—TCO Data In Register .................................................... 552
13.9.3 TCO_DAT_OUT—TCO Data Out Register................................................ 552
13.9.4 TCO1_STS—TCO1 Status Register........................................................ 552
13.9.5 TCO2_STS—TCO2 Status Register........................................................ 554
13.9.6 TCO1_CNT—TCO1 Control Register ...................................................... 555
13.9.7 TCO2_CNT—TCO2 Control Register ...................................................... 556
13.9.8 TCO_MESSAGE1 and TCO_MESSAGE2 Registers .................................... 556
13.9.9 TCO_WDCNT—TCO Watchdog Control Register ......................................557
13.9.10 SW_IRQ_GEN—Software IRQ Generation Register.................................. 557
13.9.11 TCO_TMR—TCO Timer Initial Value Register .......................................... 557
13.10 General Purpose I/O Registers...........................................................................558
13.10.1 GPIO_USE_SEL—GPIO Use Select Register............................................ 559
13.10.2 GP_IO_SEL—GPIO Input/Output Select Register ....................................559
13.10.3 GP_LVL—GPIO Level for Input or Output Register .................................. 560
13.10.4 GPO_BLINK—GPO Blink Enable Register................................................560
13.10.5 GP_SER_BLINK—GP Serial Blink Register .............................................. 561
13.10.6 GP_SB_CMDSTS—GP Serial Blink Command
Status Register.................................................................................. 562
13.10.7 GP_SB_DATA—GP Serial Blink Data Register ......................................... 562
13.10.8 GPI_NMI_EN—GPI NMI Enable Register ................................................563
13.10.9 GPI_NMI_STS—GPI NMI Status Register ............................................... 563
13.10.10 GPI_INV—GPIO Signal Invert Register .................................................. 563
13.10.11 GPIO_USE_SEL2—GPIO Use Select 2 Register .......................................564
13.10.12 GP_IO_SEL2—GPIO Input/Output Select 2 Register................................564
13.10.13 GP_LVL2—GPIO Level for Input or Output 2 Register .............................. 565
13.10.14 GPIO_USE_SEL3—GPIO Use Select 3 Register .......................................566
13.10.15 GP_IO_SEL3—GPIO Input/Output Select 3 Register................................567
13.10.16 GP_LVL3—GPIO Level for Input or Output 3 Register .............................. 568
13.10.17 GP_RST_SEL1—GPIO Reset Select Register...........................................569
13.10.18 GP_RST_SEL2—GPIO Reset Select Register...........................................569
Datasheet 15
13.10.19 GP_RST_SEL3—GPIO Reset Select Register .......................................... 570
14 SATA Controller Registers (D31:F2)....................................................................... 571
14.1 PCI Configuration Registers (SATA–D31:F2)........................................................ 571
14.1.1 VID—Vendor Identification Register (SATA—D31:F2) ............................. 573
14.1.2 DID—Device Identification Register (SATA—D31:F2).............................. 573
14.1.3 PCICMD—PCI Command Register (SATA–D31:F2).................................. 573
14.1.4 PCISTS—PCI Status Register (SATA–D31:F2)........................................ 574
14.1.5 RID—Revision Identification Register (SATA—D31:F2)............................ 575
14.1.6 PI—Programming Interface Register (SATA–D31:F2).............................. 575
14.1.6.1 When Sub Class Code Register (D31:F2:Offset 0Ah) = 01h....... 575
14.1.6.2 When Sub Class Code Register (D31:F2:Offset 0Ah) = 04h....... 576
14.1.6.3 When Sub Class Code Register (D31:F2:Offset 0Ah) = 06h....... 576
14.1.7 SCC—Sub Class Code Register (SATA–D31:F2) ..................................... 576
14.1.8 BCC—Base Class Code Register
(SATA–D31:F2SATA–D31:F2) ............................................................. 577
14.1.9 PMLT—Primary Master Latency Timer Register
(SATA–D31:F2) ................................................................................ 577
14.1.10 HTYPE—Header Type Register
(SATA–D31:F2) ................................................................................ 577
14.1.11 PCMD_BAR—Primary Command Block Base Address
Register (SATA–D31:F2) .................................................................... 577
14.1.12 PCNL_BAR—Primary Control Block Base Address
Register (SATA–D31:F2) .................................................................... 578
14.1.13 SCMD_BAR—Secondary Command Block Base Address
Register (IDE D31:F2) ....................................................................... 578
14.1.14 SCNL_BAR—Secondary Control Block Base Address
Register (IDE D31:F2) ....................................................................... 578
14.1.15 BAR—Legacy Bus Master Base Address Register
(SATA–D31:F2) ................................................................................ 579
14.1.16 ABAR/SIDPBA1—AHCI Base Address Register/Serial ATA
Index Data Pair Base Address (SATA–D31:F2) ...................................... 579
14.1.16.1 When SCC is not 01h ........................................................... 579
14.1.16.2 When SCC is 01h ................................................................ 580
14.1.17 SVID—Subsystem Vendor Identification Register
(SATA–D31:F2) ................................................................................ 580
14.1.18 SID—Subsystem Identification Register (SATA–D31:F2) ......................... 580
14.1.19 CAP—Capabilities Pointer Register (SATA–D31:F2)................................. 580
14.1.20 INT_LN—Interrupt Line Register (SATA–D31:F2) ................................... 581
14.1.21 INT_PN—Interrupt Pin Register (SATA–D31:F2)..................................... 581
14.1.22 IDE_TIM—IDE Timing Register (SATA–D31:F2) ..................................... 581
14.1.23 SIDETIM—Slave IDE Timing Register (SATA–D31:F2)............................. 582
14.1.24 SDMA_CNT—Synchronous DMA Control Register
(SATA–D31:F2) ................................................................................ 582
14.1.25 SDMA_TIM—Synchronous DMA Timing Register
(SATA–D31:F2) ................................................................................ 582
14.1.26 IDE_CONFIG—IDE I/O Configuration Register
(SATA–D31:F2) ................................................................................ 583
14.1.27 PID—PCI Power Management Capability Identification
Register (SATA–D31:F2) .................................................................... 583
14.1.28 PC—PCI Power Management Capabilities Register
(SATA–D31:F2) ................................................................................ 584
14.1.29 PMCS—PCI Power Management Control and Status
Register (SATA–D31:F2) .................................................................... 585
14.1.30 MSICI—Message Signaled Interrupt Capability
Identification Register (SATA–D31:F2) ................................................. 586
14.1.31 MSIMC—Message Signaled Interrupt Message
Control Register (SATA–D31:F2) ......................................................... 586
14.1.32 MSIMA—Message Signaled Interrupt Message
Address Register (SATA–D31:F2) ........................................................ 588
14.1.33 MSIMD—Message Signaled Interrupt Message
Data Register (SATA–D31:F2)............................................................. 588
14.1.34 MAP—Address Map Register (SATA–D31:F2) ......................................... 589
14.1.35 PCS—Port Control and Status Register (SATA–D31:F2)........................... 590
14.1.36 SCLKCG—SATA Clock Gating Control Register ....................................... 592
14.1.37 SCLKGC—SATA Clock General Configuration Register ............................. 593
14.1.38 SIRI—SATA Indexed Registers Index Register ....................................... 594
16 Datasheet
14.1.39 FLRCID—FLR Capability ID Register (SATA–D31:F2) ............................... 594
14.1.40 FLRCLV—FLR Capability Length and Version
Register (SATA–D31:F2)....................................................................595
14.1.41 FLRC—FLR Control Register (SATA–D31:F2) .......................................... 595
14.1.42 ATC—APM Trapping Control Register (SATA–D31:F2)..............................596
14.1.43 ATS—APM Trapping Status Register (SATA–D31:F2)............................... 596
14.1.44 SP Scratch Pad Register (SATA–D31:F2)...............................................596
14.1.45 BFCS—BIST FIS Control/Status Register (SATA–D31:F2) ........................ 597
14.1.46 BFTD1—BIST FIS Transmit Data1 Register (SATA–D31:F2) ..................... 599
14.1.47 BFTD2—BIST FIS Transmit Data2 Register (SATA–D31:F2) ..................... 599
14.2 Bus Master IDE I/O Registers (D31:F2)...............................................................600
14.2.1 BMIC[P,S]—Bus Master IDE Command Register (D31:F2) .......................601
14.2.2 BMIS[P,S]—Bus Master IDE Status Register (D31:F2)............................. 602
14.2.3 BMID[P,S]—Bus Master IDE Descriptor Table Pointer
Register (D31:F2)..............................................................................603
14.2.4 AIR—AHCI Index Register (D31:F2) ..................................................... 603
14.2.5 AIDR—AHCI Index Data Register (D31:F2)............................................603
14.3 Serial ATA Index/Data Pair Superset Registers..................................................... 604
14.3.1 SINDX—Serial ATA Index Register (D31:F2)..........................................604
14.3.2 SDATA—Serial ATA Data Register (D31:F2)........................................... 605
14.3.2.1 PxSSTS—Serial ATA Status Register (D31:F2) .........................605
14.3.2.2 PxSCTL—Serial ATA Control Register (D31:F2) ........................606
14.3.2.3 PxSERR—Serial ATA Error Register (D31:F2) ...........................607
14.4 AHCI Registers (D31:F2) .................................................................................. 608
14.4.1 AHCI Generic Host Control Registers (D31:F2).......................................609
14.4.1.1 CAP—Host Capabilities Register (D31:F2) ............................... 609
14.4.1.2 GHC—Global PCH Control Register (D31:F2)............................ 611
14.4.1.3 IS—Interrupt Status Register (D31:F2)...................................612
14.4.1.4 PI—Ports Implemented Register (D31:F2)............................... 613
14.4.1.5 VS—AHCI Version Register (D31:F2) ......................................614
14.4.1.6 CCC_CTL—Command Completion Coalescing Control
Register (D31:F2)................................................................614
14.4.1.7 CCC_Ports—Command Completion Coalescing Ports
Register (D31:F2)................................................................615
14.4.1.8 EM_LOC—Enclosure Management Location Register (D31:F2) .... 615
14.4.1.9 EM_CTRL—Enclosure Management Control Register (D31:F2) .... 616
14.4.1.10 VS—AHCI Version Register (D31:F2) ......................................617
14.4.1.11 VSP—Vendor Specific Register (D31:F2) .................................617
14.4.1.12 RSTF—Intel® RST Feature Capabilities Register ....................... 617
14.4.2 Port Registers (D31:F2)......................................................................619
14.4.2.1 PxCLB—Port [5:0] Command List Base Address Register
(D31:F2) ............................................................................ 623
14.4.2.2 PxCLBU—Port [5:0] Command List Base Address Upper
32-Bits Register (D31:F2)..................................................... 623
14.4.2.3 PxFB—Port [5:0] FIS Base Address Register (D31:F2) .............. 624
14.4.2.4 PxFBU—Port [5:0] FIS Base Address Upper 32-Bits
Register (D31:F2)................................................................624
14.4.2.5 PxIS—Port [5:0] Interrupt Status Register (D31:F2)................. 625
14.4.2.6 PxIE—Port [5:0] Interrupt Enable Register (D31:F2) ................ 626
14.4.2.7 PxCMD—Port [5:0] Command Register (D31:F2)...................... 628
14.4.2.8 PxTFD—Port [5:0] Task File Data Register (D31:F2) .................631
14.4.2.9 PxSIG—Port [5:0] Signature Register (D31:F2) .......................631
14.4.2.10 PxSSTS—Port [5:0] Serial ATA Status Register (D31:F2) .......... 632
14.4.2.11 PxSCTL—Port [5:0] Serial ATA Control Register (D31:F2).......... 633
14.4.2.12 PxSERR—Port [5:0] Serial ATA Error Register (D31:F2) ............ 634
14.4.2.13 PxSACT—Port [5:0] Serial ATA Active Register (D31:F2) ........... 635
14.4.2.14 PxCI—Port [5:0] Command Issue Register (D31:F2) ................636
15 SATA Controller Registers (D31:F5) ....................................................................... 637
15.1 PCI Configuration Registers (SATA–D31:F5) ........................................................ 637
15.1.1 VID—Vendor Identification Register (SATA—D31:F5) .............................. 638
15.1.2 DID—Device Identification Register (SATA—D31:F5) ..............................638
15.1.3 PCICMD—PCI Command Register (SATA–D31:F5) ..................................639
15.1.4 PCISTS—PCI Status Register (SATA–D31:F5) ........................................640
15.1.5 RID—Revision Identification Register (SATA—D31:F5) ............................ 640
15.1.6 PI—Programming Interface Register (SATA–D31:F5) .............................. 641
15.1.7 SCC—Sub Class Code Register (SATA–D31:F5)...................................... 641
Datasheet 17
15.1.8 BCC—Base Class Code Register
(SATA–D31:F5SATA–D31:F5) ............................................................. 641
15.1.9 PMLT—Primary Master Latency Timer Register
(SATA–D31:F5) ................................................................................ 642
15.1.10 PCMD_BAR—Primary Command Block Base Address
Register (SATA–D31:F5) .................................................................... 642
15.1.11 PCNL_BAR—Primary Control Block Base Address Register
(SATA–D31:F5) ................................................................................ 642
15.1.12 SCMD_BAR—Secondary Command Block Base Address
Register (IDE D31:F5) ....................................................................... 643
15.1.13 SCNL_BAR—Secondary Control Block Base Address
Register (IDE D31:F5) ....................................................................... 643
15.1.14 BAR—Legacy Bus Master Base Address Register
(SATA–D31:F5) ................................................................................ 644
15.1.15 SIDPBA—SATA Index/Data Pair Base Address Register
(SATA–D31:F5) ................................................................................ 644
15.1.16 SVID—Subsystem Vendor Identification Register
(SATA–D31:F5) ................................................................................ 645
15.1.17 SID—Subsystem Identification Register (SATA–D31:F5) ......................... 645
15.1.18 CAP—Capabilities Pointer Register (SATA–D31:F5)................................. 645
15.1.19 INT_LN—Interrupt Line Register (SATA–D31:F5) ................................... 645
15.1.20 INT_PN—Interrupt Pin Register (SATA–D31:F5)..................................... 645
15.1.21 IDE_TIM—IDE Timing Register (SATA–D31:F5) ..................................... 646
15.1.22 SDMA_CNT—Synchronous DMA Control Register
(SATA–D31:F5) ................................................................................ 646
15.1.23 SDMA_TIM—Synchronous DMA Timing Register
(SATA–D31:F5) ................................................................................ 647
15.1.24 IDE_CONFIG—IDE I/O Configuration Register
(SATA–D31:F5) ................................................................................ 647
15.1.25 PID—PCI Power Management Capability Identification
Register (SATA–D31:F5) .................................................................... 648
15.1.26 PC—PCI Power Management Capabilities Register
(SATA–D31:F5) ................................................................................ 648
15.1.27 PMCS—PCI Power Management Control and Status
Register (SATA–D31:F5) .................................................................... 649
15.1.28 MAP—Address Map Register (SATA–D31:F5) ......................................... 650
15.1.29 PCS—Port Control and Status Register (SATA–D31:F5)........................... 651
15.1.30 SATACR0—SATA Capability Register 0 (SATA–D31:F5) ........................... 652
15.1.31 SATACR1—SATA Capability Register 1 (SATA–D31:F5) ........................... 652
15.1.32 FLRCID—FLR Capability ID Register (SATA–D31:F5) .............................. 652
15.1.33 FLRCLV—FLR Capability Length and Value
Register (SATA–D31:F5) .................................................................... 653
15.1.34 FLRCTRL—FLR Control Register (SATA–D31:F5) .................................... 653
15.1.35 ATC—APM Trapping Control Register (SATA–D31:F5) ............................. 654
15.1.36 ATC—APM Trapping Control Register (SATA–D31:F5) ............................. 654
15.2 Bus Master IDE I/O Registers (D31:F5) .............................................................. 655
15.2.1 BMIC[P,S]—Bus Master IDE Command Register (D31:F5) ....................... 656
15.2.2 BMIS[P,S]—Bus Master IDE Status Register (D31:F5) ............................ 657
15.2.3 BMID[P,S]—Bus Master IDE Descriptor Table Pointer
Register (D31:F5) ............................................................................. 657
15.3 Serial ATA Index/Data Pair Superset Registers .................................................... 658
15.3.1 SINDX—SATA Index Register (D31:F5) ................................................ 658
15.3.2 SDATA—SATA Index Data Register (D31:F5) ........................................ 658
15.3.2.1 PxSSTS—Serial ATA Status Register (D31:F5)......................... 659
15.3.2.2 PxSCTL—Serial ATA Control Register (D31:F5) ........................ 660
15.3.2.3 PxSERR—Serial ATA Error Register (D31:F5)........................... 661
16 EHCI Controller Registers (D29:F0, D26:F0) .......................................................... 663
16.1 USB EHCI Configuration Registers
(USB EHCI—D29:F0, D26:F0) ........................................................................... 663
16.1.1 VID—Vendor Identification Register
(USB EHCI—D29:F0, D26:F0) ............................................................. 664
16.1.2 DID—Device Identification Register
(USB EHCI—D29:F0, D26:F0) ............................................................. 665
16.1.3 PCICMD—PCI Command Register
(USB EHCI—D29:F0, D26:F0) ............................................................. 665
18 Datasheet
16.1.4 PCISTS—PCI Status Register
(USB EHCI—D29:F0, D26:F0).............................................................. 666
16.1.5 RID—Revision Identification Register
(USB EHCI—D29:F0, D26:F0).............................................................. 667
16.1.6 PI—Programming Interface Register
(USB EHCI—D29:F0, D26:F0).............................................................. 667
16.1.7 SCC—Sub Class Code Register
(USB EHCI—D29:F0, D26:F0).............................................................. 667
16.1.8 BCC—Base Class Code Register
(USB EHCI—D29:F0, D26:F0).............................................................. 668
16.1.9 PMLT—Primary Master Latency Timer Register
(USB EHCI—D29:F0, D26:F0).............................................................. 668
16.1.10 HEADTYP—Header Type Register
(USB EHCI—D29:F0, D26:F0).............................................................. 668
16.1.11 MEM_BASE—Memory Base Address Register
(USB EHCI—D29:F0, D26:F0).............................................................. 669
16.1.12 SVID—USB EHCI Subsystem Vendor ID Register
(USB EHCI—D29:F0, D26:F0).............................................................. 669
16.1.13 SID—USB EHCI Subsystem ID Register
(USB EHCI—D29:F0, D26:F0).............................................................. 669
16.1.14 CAP_PTR—Capabilities Pointer Register
(USB EHCI—D29:F0, D26:F0).............................................................. 670
16.1.15 INT_LN—Interrupt Line Register
(USB EHCI—D29:F0, D26:F0).............................................................. 670
16.1.16 INT_PN—Interrupt Pin Register
(USB EHCI—D29:F0, D26:F0).............................................................. 670
16.1.17 PWR_CAPID—PCI Power Management Capability ID
Register (USB EHCI—D29:F0, D26:F0) ................................................. 670
16.1.18 NXT_PTR1—Next Item Pointer #1 Register
(USB EHCI—D29:F0, D26:F0).............................................................. 671
16.1.19 PWR_CAP—Power Management Capabilities Register
(USB EHCI—D29:F0, D26:F0).............................................................. 671
16.1.20 PWR_CNTL_STS—Power Management Control/
Status Register (USB EHCI—D29:F0, D26:F0) ....................................... 672
16.1.21 DEBUG_CAPID—Debug Port Capability ID Register
(USB EHCI—D29:F0, D26:F0).............................................................. 673
16.1.22 NXT_PTR2—Next Item Pointer #2 Register
(USB EHCI—D29:F0, D26:F0).............................................................. 673
16.1.23 DEBUG_BASE—Debug Port Base Offset Register
(USB EHCI—D29:F0, D26:F0).............................................................. 673
16.1.24 USB_RELNUM—USB Release Number Register
(USB EHCI—D29:F0, D26:F0).............................................................. 673
16.1.25 FL_ADJ—Frame Length Adjustment Register
(USB EHCI—D29:F0, D26:F0).............................................................. 674
16.1.26 PWAKE_CAP—Port Wake Capability Register
(USB EHCI—D29:F0, D26:F0).............................................................. 675
16.1.27 LEG_EXT_CAP—USB EHCI Legacy Support Extended
Capability Register (USB EHCI—D29:F0, D26:F0)...................................676
16.1.28 LEG_EXT_CS—USB EHCI Legacy Support Extended
Control / Status Register (USB EHCI—D29:F0, D26:F0) .......................... 677
16.1.29 SPECIAL_SMI—Intel Specific USB 2.0 SMI Register
(USB EHCI—D29:F0, D26:F0).............................................................. 679
16.1.30 ACCESS_CNTL—Access Control Register
(USB EHCI—D29:F0, D26:F0).............................................................. 680
16.1.31 EHCIIR1—EHCI Initialization Register 1
(USB EHCI—D29:F0, D26:F0).............................................................. 681
16.1.32 EHCIIR2—EHCI Initialization Register 2 (USB EHCI—D29:F0, D26:F0) ...... 681
16.1.33 FLR_CID—Function Level Reset Capability ID
Register (USB EHCI—D29:F0, D26:F0) ................................................ 682
16.1.34 FLR_NEXT—Function Level Reset Next Capability Pointer
Register (USB EHCI—D29:F0, D26:F0) ................................................ 682
16.1.35 FLR_CLV—Function Level Reset Capability Length and
Version Register (USB EHCI—D29:F0, D26:F0) ......................................683
16.1.36 FLR_CTRL—Function Level Reset Control Register
(USB EHCI—D29:F0, D26:F0).............................................................. 683
16.1.37 FLR_STS—Function Level Reset Status Register
(USB EHCI—D29:F0, D26:F0).............................................................. 684
Datasheet 19
16.1.38 EHCIIR3—EHCI Initialization Register 3 (USB EHCI—D29:F0, D26:F0)...... 684
16.1.39 EHCIIR4—EHCI Initialization Register 4 (USB EHCI—D29:F0, D26:F0)...... 684
16.2 Memory-Mapped I/O Registers .......................................................................... 685
16.2.1 Host Controller Capability Registers ..................................................... 685
16.2.1.1 CAPLENGTH—Capability Registers Length Register................... 686
16.2.1.2 HCIVERSION—Host Controller Interface Version Number
Register ............................................................................. 686
16.2.1.3 HCSPARAMS—Host Controller Structural Parameters Register.... 686
16.2.1.4 HCCPARAMS—Host Controller Capability Parameters
Register ............................................................................. 687
16.2.2 Host Controller Operational Registers................................................... 688
16.2.2.1 USB2.0_CMD—USB 2.0 Command Register............................. 689
16.2.2.2 USB2.0_STS—USB 2.0 Status Register................................... 692
16.2.2.3 USB2.0_INTR—USB 2.0 Interrupt Enable Register ................... 694
16.2.2.4 FRINDEX—Frame Index Register ........................................... 695
16.2.2.5 CTRLDSSEGMENT—Control Data Structure Segment
Register ............................................................................. 695
16.2.2.6 PERIODICLISTBASE—Periodic Frame List Base Address
Register ............................................................................. 696
16.2.2.7 ASYNCLISTADDR—Current Asynchronous List Address
Register ............................................................................. 696
16.2.2.8 CONFIGFLAG—Configure Flag Register ................................... 697
16.2.2.9 PORTSC—Port N Status and Control Register .......................... 697
16.2.3 USB 2.0-Based Debug Port Registers ................................................... 701
16.2.3.1 CNTL_STS—Control/Status Register....................................... 702
16.2.3.2 USBPID—USB PIDs Register ................................................. 704
16.2.3.3 DATABUF[7:0]—Data Buffer Bytes[7:0] Register ..................... 704
16.2.3.4 CONFIG—Configuration Register............................................ 704
17 Intel® High Definition Audio Controller Registers (D27:F0) ................................... 705
17.1 Intel® High Definition Audio PCI Configuration
Space (Intel® High Definition Audio—D27:F0) ..................................................... 705
17.1.1 VID—Vendor Identification Register
(Intel® High Definition Audio Controller—D27:F0).................................. 707
17.1.2 DID—Device Identification Register
(Intel® High Definition Audio Controller—D27:F0).................................. 707
17.1.3 PCICMD—PCI Command Register
(Intel® High Definition Audio Controller—D27:F0).................................. 708
17.1.4 PCISTS—PCI Status Register
(Intel® High Definition Audio Controller—D27:F0).................................. 709
17.1.5 RID—Revision Identification Register
(Intel® High Definition Audio Controller—D27:F0).................................. 710
17.1.6 PI—Programming Interface Register
(Intel® High Definition Audio Controller—D27:F0).................................. 710
17.1.7 SCC—Sub Class Code Register
(Intel® High Definition Audio Controller—D27:F0).................................. 710
17.1.8 BCC—Base Class Code Register
(Intel® High Definition Audio Controller—D27:F0).................................. 710
17.1.9 CLS—Cache Line Size Register
(Intel® High Definition Audio Controller—D27:F0).................................. 710
17.1.10 LT—Latency Timer Register
(Intel® High Definition Audio Controller—D27:F0).................................. 711
17.1.11 HEADTYP—Header Type Register
(Intel® High Definition Audio Controller—D27:F0).................................. 711
17.1.12 HDBARL—Intel® High Definition Audio Lower Base Address
Register (Intel® High Definition Audio—D27:F0) .................................... 711
17.1.13 HDBARU—Intel® High Definition Audio Upper Base Address Register
(Intel® High Definition Audio Controller—D27:F0).................................. 711
17.1.14 SVID—Subsystem Vendor Identification Register
(Intel® High Definition Audio Controller—D27:F0).................................. 712
17.1.15 SID—Subsystem Identification Register
(Intel® High Definition Audio Controller—D27:F0).................................. 712
17.1.16 CAPPTR—Capabilities Pointer Register
(Intel® High Definition Audio Controller—D27:F0).................................. 712
17.1.17 INTLN—Interrupt Line Register
(Intel® High Definition Audio Controller—D27:F0).................................. 713
20 Datasheet
17.1.18 INTPN—Interrupt Pin Register
(Intel® High Definition Audio Controller—D27:F0) ..................................713
17.1.19 HDCTL—Intel® High Definition Audio Control Register
(Intel® High Definition Audio Controller—D27:F0) ..................................713
17.1.20 HDINIT1—Intel® High Definition Audio Initialization
Register 1 (Intel® High Definition
Audio Controller—D27:F0) ..................................................................713
17.1.21 TCSEL—Traffic Class Select Register
(Intel® High Definition Audio Controller—D27:F0) ..................................714
17.1.22 DCKCTL—Docking Control Register (Mobile Only)
(Intel® High Definition Audio Controller—D27:F0) ..................................714
17.1.23 DCKSTS—Docking Status Register (Mobile Only)
(Intel® High Definition Audio Controller—D27:F0) ..................................715
17.1.24 PID—PCI Power Management Capability ID Register
(Intel® High Definition Audio Controller—D27:F0) ..................................715
17.1.25 PC—Power Management Capabilities Register
(Intel® High Definition Audio Controller—D27:F0) ..................................716
17.1.26 PCS—Power Management Control and Status Register
(Intel® High Definition Audio Controller—D27:F0) ..................................716
17.1.27 MID—MSI Capability ID Register
(Intel® High Definition Audio Controller—D27:F0) ..................................717
17.1.28 MMC—MSI Message Control Register
(Intel® High Definition Audio Controller—D27:F0) ..................................717
17.1.29 MMLA—MSI Message Lower Address Register
(Intel® High Definition Audio Controller—D27:F0) ..................................718
17.1.30 MMUA—MSI Message Upper Address Register
(Intel® High Definition Audio Controller—D27:F0) ..................................718
17.1.31 MMD—MSI Message Data Register
(Intel® High Definition Audio Controller—D27:F0) ..................................718
17.1.32 PXID—PCI Express* Capability ID Register
(Intel® High Definition Audio Controller—D27:F0) ..................................718
17.1.33 PXC—PCI Express* Capabilities Register
(Intel® High Definition Audio Controller—D27:F0) ..................................719
17.1.34 DEVCAP—Device Capabilities Register
(Intel® High Definition Audio Controller—D27:F0) ..................................719
17.1.35 DEVC—Device Control Register
(Intel® High Definition Audio Controller—D27:F0) ..................................720
17.1.36 DEVS—Device Status Register
(Intel® High Definition Audio Controller—D27:F0) ..................................721
17.1.37 VCCAP—Virtual Channel Enhanced Capability Header
(Intel® High Definition Audio Controller—D27:F0) ..................................721
17.1.38 PVCCAP1—Port VC Capability Register 1
(Intel® High Definition Audio Controller—D27:F0) ..................................722
17.1.39 PVCCAP2—Port VC Capability Register 2
(Intel® High Definition Audio Controller—D27:F0) ..................................722
17.1.40 PVCCTL—Port VC Control Register
(Intel® High Definition Audio Controller—D27:F0) ..................................722
17.1.41 PVCSTS—Port VC Status Register
(Intel® High Definition Audio Controller—D27:F0) ..................................723
17.1.42 VC0CAP—VC0 Resource Capability Register
(Intel® High Definition Audio Controller—D27:F0) ..................................723
17.1.43 VC0CTL—VC0 Resource Control Register
(Intel® High Definition Audio Controller—D27:F0) ..................................724
17.1.44 VC0STS—VC0 Resource Status Register
(Intel® High Definition Audio Controller—D27:F0) ..................................724
17.1.45 VCiCAP—VCi Resource Capability Register
(Intel® High Definition Audio Controller—D27:F0) ..................................725
17.1.46 VCiCTL—VCi Resource Control Register
(Intel® High Definition Audio Controller—D27:F0) ..................................725
17.1.47 VCiSTS—VCi Resource Status Register
(Intel® High Definition Audio Controller—D27:F0) ..................................726
17.1.48 RCCAP—Root Complex Link Declaration Enhanced
Capability Header Register
(Intel® High Definition Audio Controller—D27:F0) ..................................726
17.1.49 ESD—Element Self Description Register
(Intel® High Definition Audio Controller—D27:F0) ..................................726
Datasheet 21
17.1.50 L1DESC—Link 1 Description Register
(Intel® High Definition Audio Controller—D27:F0).................................. 727
17.1.51 L1ADDL—Link 1 Lower Address Register
(Intel® High Definition Audio Controller—D27:F0).................................. 727
17.1.52 L1ADDU—Link 1 Upper Address Register
(Intel® High Definition Audio Controller—D27:F0).................................. 727
17.2 Intel® High Definition Audio Memory Mapped Configuration Registers
(Intel® High Definition Audio—D27:F0) .............................................................. 728
17.2.1 GCAP—Global Capabilities Register
(Intel® High Definition Audio Controller—D27:F0).................................. 732
17.2.2 VMIN—Minor Version Register
(Intel® High Definition Audio Controller—D27:F0).................................. 732
17.2.3 VMAJ—Major Version Register
(Intel® High Definition Audio Controller—D27:F0).................................. 732
17.2.4 OUTPAY—Output Payload Capability Register
(Intel® High Definition Audio Controller—D27:F0).................................. 733
17.2.5 INPAY—Input Payload Capability Register
(Intel® High Definition Audio Controller—D27:F0).................................. 733
17.2.6 GCTL—Global Control Register
(Intel® High Definition Audio Controller—D27:F0).................................. 734
17.2.7 WAKEEN—Wake Enable Register
(Intel® High Definition Audio Controller—D27:F0).................................. 735
17.2.8 STATESTS—State Change Status Register
(Intel® High Definition Audio Controller—D27:F0).................................. 735
17.2.9 GSTS—Global Status Register
(Intel® High Definition Audio Controller—D27:F0).................................. 736
17.2.10 OUTSTRMPAY—Output Stream Payload Capability
Register (Intel® High Definition Audio Controller—D27:F0) ..................... 736
17.2.11 INSTRMPAY—Input Stream Payload Capability
Register (Intel® High Definition Audio Controller—D27:F0) ..................... 737
17.2.12 INTCTL—Interrupt Control Register
(Intel® High Definition Audio Controller—D27:F0).................................. 737
17.2.13 INTSTS—Interrupt Status Register
(Intel® High Definition Audio Controller—D27:F0).................................. 738
17.2.14 WALCLK—Wall Clock Counter Register
(Intel® High Definition Audio Controller—D27:F0).................................. 739
17.2.15 SSYNC—Stream Synchronization Register
(Intel® High Definition Audio Controller—D27:F0).................................. 739
17.2.16 CORBLBASE—CORB Lower Base Address Register
(Intel® High Definition Audio Controller—D27:F0).................................. 740
17.2.17 CORBUBASE—CORB Upper Base Address Register
(Intel® High Definition Audio Controller—D27:F0).................................. 740
17.2.18 CORBWP—CORB Write Pointer Register
(Intel® High Definition Audio Controller—D27:F0).................................. 740
17.2.19 CORBRP—CORB Read Pointer Register
(Intel® High Definition Audio Controller—D27:F0).................................. 741
17.2.20 CORBCTL—CORB Control Register
(Intel® High Definition Audio Controller—D27:F0).................................. 741
17.2.21 CORBST—CORB Status Register
(Intel® High Definition Audio Controller—D27:F0).................................. 742
17.2.22 CORBSIZE—CORB Size Register
Intel® High Definition Audio Controller—D27:F0)................................... 742
17.2.23 RIRBLBASE—RIRB Lower Base Address Register
(Intel® High Definition Audio Controller—D27:F0).................................. 742
17.2.24 RIRBUBASE—RIRB Upper Base Address Register
(Intel® High Definition Audio Controller—D27:F0).................................. 743
17.2.25 RIRBWP—RIRB Write Pointer Register
(Intel® High Definition Audio Controller—D27:F0).................................. 743
17.2.26 RINTCNT—Response Interrupt Count Register
(Intel® High Definition Audio Controller—D27:F0).................................. 744
17.2.27 RIRBCTL—RIRB Control Register
(Intel® High Definition Audio Controller—D27:F0).................................. 744
17.2.28 RIRBSTS—RIRB Status Register
(Intel® High Definition Audio Controller—D27:F0).................................. 745
17.2.29 RIRBSIZE—RIRB Size Register
(Intel® High Definition Audio Controller—D27:F0).................................. 745
22 Datasheet
17.2.30 IC—Immediate Command Register
(Intel® High Definition Audio Controller—D27:F0) ..................................745
17.2.31 IR—Immediate Response Register
(Intel® High Definition Audio Controller—D27:F0) ..................................746
17.2.32 ICS—Immediate Command Status Register
(Intel® High Definition Audio Controller—D27:F0) ..................................746
17.2.33 DPLBASE—DMA Position Lower Base Address Register
(Intel® High Definition Audio Controller—D27:F0) ..................................747
17.2.34 DPUBASE—DMA Position Upper Base Address Register
(Intel® High Definition Audio Controller—D27:F0) ..................................747
17.2.35 SDCTL—Stream Descriptor Control Register
(Intel® High Definition Audio Controller—D27:F0) ..................................748
17.2.36 SDSTS—Stream Descriptor Status Register
(Intel® High Definition Audio Controller—D27:F0) ..................................750
17.2.37 SDLPIB—Stream Descriptor Link Position in Buffer
Register (Intel® High Definition Audio Controller—D27:F0)...................... 751
17.2.38 SDCBL—Stream Descriptor Cyclic Buffer Length Register
(Intel® High Definition Audio Controller—D27:F0) ..................................751
17.2.39 SDLVI—Stream Descriptor Last Valid Index Register
(Intel® High Definition Audio Controller—D27:F0) ..................................752
17.2.40 SDFIFOW—Stream Descriptor FIFO Watermark Register
(Intel® High Definition Audio Controller—D27:F0) ..................................752
17.2.41 SDFIFOS—Stream Descriptor FIFO Size Register
(Intel® High Definition Audio Controller—D27:F0) ..................................753
17.2.42 SDFMT—Stream Descriptor Format Register
(Intel® High Definition Audio Controller—D27:F0) ..................................754
17.2.43 SDBDPL—Stream Descriptor Buffer Descriptor List
Pointer Lower Base Address Register
(Intel® High Definition Audio Controller—D27:F0) ..................................755
17.2.44 SDBDPU—Stream Descriptor Buffer Descriptor List
Pointer Upper Base Address Register
(Intel® High Definition Audio Controller—D27:F0) ..................................755
18 SMBus Controller Registers (D31:F3) ..................................................................... 757
18.1 PCI Configuration Registers (SMBus—D31:F3) ..................................................... 757
18.1.1 VID—Vendor Identification Register (SMBus—D31:F3) ............................ 757
18.1.2 DID—Device Identification Register (SMBus—D31:F3) ............................ 758
18.1.3 PCICMD—PCI Command Register (SMBus—D31:F3) ............................... 758
18.1.4 PCISTS—PCI Status Register (SMBus—D31:F3) ..................................... 759
18.1.5 RID—Revision Identification Register (SMBus—D31:F3) .......................... 759
18.1.6 PI—Programming Interface Register (SMBus—D31:F3) ........................... 760
18.1.7 SCC—Sub Class Code Register (SMBus—D31:F3) ...................................760
18.1.8 BCC—Base Class Code Register (SMBus—D31:F3).................................. 760
18.1.9 SMBMBAR0—D31_F3_SMBus Memory Base Address 0
Register (SMBus—D31:F3).................................................................760
18.1.10 SMBMBAR1—D31_F3_SMBus Memory Base Address 1
Register (SMBus—D31:F3).................................................................761
18.1.11 SMB_BASE—SMBus Base Address Register
(SMBus—D31:F3) .............................................................................. 761
18.1.12 SVID—Subsystem Vendor Identification Register
(SMBus—D31:F2/F4) ......................................................................... 761
18.1.13 SID—Subsystem Identification Register
(SMBus—D31:F2/F4) ......................................................................... 762
18.1.14 INT_LN—Interrupt Line Register (SMBus—D31:F3)................................. 762
18.1.15 INT_PN—Interrupt Pin Register (SMBus—D31:F3) .................................. 762
18.1.16 HOSTC—Host Configuration Register (SMBus—D31:F3)...........................763
18.2 SMBus I/O and Memory Mapped I/O Registers ..................................................... 764
18.2.1 HST_STS—Host Status Register (SMBus—D31:F3) ................................. 765
18.2.2 HST_CNT—Host Control Register (SMBus—D31:F3)................................ 766
18.2.3 HST_CMD—Host Command Register (SMBus—D31:F3) ...........................768
18.2.4 XMIT_SLVA—Transmit Slave Address Register
(SMBus—D31:F3) .............................................................................. 768
18.2.5 HST_D0—Host Data 0 Register (SMBus—D31:F3) ..................................768
18.2.6 HST_D1—Host Data 1 Register (SMBus—D31:F3) ..................................768
18.2.7 Host_BLOCK_DB—Host Block Data Byte Register
(SMBus—D31:F3) .............................................................................. 769
Datasheet 23
18.2.8 PEC—Packet Error Check (PEC) Register
(SMBus—D31:F3).............................................................................. 769
18.2.9 RCV_SLVA—Receive Slave Address Register
(SMBus—D31:F3).............................................................................. 770
18.2.10 SLV_DATA—Receive Slave Data Register (SMBus—D31:F3) .................... 770
18.2.11 AUX_STS—Auxiliary Status Register (SMBus—D31:F3)........................... 770
18.2.12 AUX_CTL—Auxiliary Control Register (SMBus—D31:F3) .......................... 771
18.2.13 SMLINK_PIN_CTL—SMLink Pin Control Register
(SMBus—D31:F3).............................................................................. 771
18.2.14 SMBus_PIN_CTL—SMBus Pin Control Register
(SMBus—D31:F3).............................................................................. 772
18.2.15 SLV_STS—Slave Status Register (SMBus—D31:F3)................................ 772
18.2.16 SLV_CMD—Slave Command Register (SMBus—D31:F3).......................... 773
18.2.17 NOTIFY_DADDR—Notify Device Address Register
(SMBus—D31:F3).............................................................................. 773
18.2.18 NOTIFY_DLOW—Notify Data Low Byte Register
(SMBus—D31:F3).............................................................................. 774
18.2.19 NOTIFY_DHIGH—Notify Data High Byte Register
(SMBus—D31:F3).............................................................................. 774
19 PCI Express* Configuration Registers.................................................................... 775
19.1 PCI Express* Configuration Registers
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7)................................................... 775
19.1.1 VID—Vendor Identification Register
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7/F6/F7) ........................... 777
19.1.2 DID—Device Identification Register
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7/F6/F7) ........................... 777
19.1.3 PCICMD—PCI Command Register
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7/F6/F7) ........................... 778
19.1.4 PCISTS—PCI Status Register
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7/F6/F7) ........................... 779
19.1.5 RID—Revision Identification Register
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7/F6/F7) ........................... 780
19.1.6 PI—Programming Interface Register
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7/F6/F7) ........................... 780
19.1.7 SCC—Sub Class Code Register
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7/F6/F7) ........................... 780
19.1.8 BCC—Base Class Code Register
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7/F6/F7) ........................... 780
19.1.9 CLS—Cache Line Size Register
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7/F6/F7) ........................... 781
19.1.10 PLT—Primary Latency Timer Register
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7/F6/F7) ........................... 781
19.1.11 HEADTYP—Header Type Register
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7/F6/F7) ........................... 781
19.1.12 BNUM—Bus Number Register
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7/F6/F7) ........................... 782
19.1.13 SLT—Secondary Latency Timer
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7/F6/F7) ........................... 782
19.1.14 IOBL—I/O Base and Limit Register
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7/F6/F7) ........................... 782
19.1.15 SSTS—Secondary Status Register
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7/F6/F7) ........................... 783
19.1.16 MBL—Memory Base and Limit Register
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7/F6/F7) ........................... 784
19.1.17 PMBL—Prefetchable Memory Base and Limit Register
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7/F6/F7) ........................... 784
19.1.18 PMBU32—Prefetchable Memory Base Upper 32 Bits
Register (PCI Express*—D28:F0/F1/F2/F3/F4/F5/
F6/F7/F6/F7) .................................................................................... 785
19.1.19 PMLU32—Prefetchable Memory Limit Upper 32 Bits
Register (PCI Express*—D28:F0/F1/F2/F3/F4/F5/
F6/F7/F6/F7) .................................................................................... 785
19.1.20 CAPP—Capabilities List Pointer Register
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7/F6/F7) ........................... 785
19.1.21 INTR—Interrupt Information Register
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7/F6/F7) ........................... 786
24 Datasheet
19.1.22 BCTRL—Bridge Control Register
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7/F6/F7) ............................787
19.1.23 CLIST—Capabilities List Register
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7) ..................................... 788
19.1.24 XCAP—PCI Express* Capabilities Register
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7) ..................................... 788
19.1.25 DCAP—Device Capabilities Register
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7) ..................................... 789
19.1.26 DCTL—Device Control Register
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7) ..................................... 790
19.1.27 DSTS—Device Status Register
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7) ..................................... 791
19.1.28 LCAP—Link Capabilities Register
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7) ..................................... 791
19.1.29 LCTL—Link Control Register
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7) ..................................... 793
19.1.30 LSTS—Link Status Register
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7) ..................................... 794
19.1.31 SLCAP—Slot Capabilities Register
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7) ..................................... 795
19.1.32 SLCTL—Slot Control Register
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7) ..................................... 796
19.1.33 SLSTS—Slot Status Register
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7) ..................................... 797
19.1.34 RCTL—Root Control Register
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7) ..................................... 798
19.1.35 RSTS—Root Status Register
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7) ..................................... 798
19.1.36 DCAP2—Device Capabilities 2 Register
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7) ..................................... 799
19.1.37 DCTL2—Device Control 2 Register
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7) ..................................... 799
19.1.38 LCTL2—Link Control 2 Register
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7) ..................................... 800
19.1.39 MID—Message Signaled Interrupt Identifiers Register
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7) ..................................... 800
19.1.40 MC—Message Signaled Interrupt Message Control Register
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7) ..................................... 800
19.1.41 MA—Message Signaled Interrupt Message Address
Register (PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7).........................801
19.1.42 MD—Message Signaled Interrupt Message Data Register
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7) ..................................... 801
19.1.43 SVCAP—Subsystem Vendor Capability Register
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7) ..................................... 801
19.1.44 SVID—Subsystem Vendor Identification Register
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7) ..................................... 801
19.1.45 PMCAP—Power Management Capability Register
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7) ..................................... 802
19.1.46 PMC—PCI Power Management Capabilities Register
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7) ..................................... 802
19.1.47 PMCS—PCI Power Management Control and Status
Register (PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7).........................803
19.1.48 MPC2—Miscellaneous Port Configuration Register 2
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7) ..................................... 804
19.1.49 MPC—Miscellaneous Port Configuration Register
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7) ..................................... 805
19.1.50 SMSCS—SMI/SCI Status Register
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7) ..................................... 807
19.1.51 RPDCGEN—Root Port Dynamic Clock Gating Enable
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7) ..................................... 808
19.1.52 PECR1—PCI Express* Configuration Register 1
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7) ..................................... 808
19.1.53 UES—Uncorrectable Error Status Register
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7) ..................................... 809
19.1.54 UEM—Uncorrectable Error Mask
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7) ..................................... 810
Datasheet 25
19.1.55 UEV—Uncorrectable Error Severity
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7)..................................... 811
19.1.56 CES—Correctable Error Status Register
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7)..................................... 812
19.1.57 CEM—Correctable Error Mask Register
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7)..................................... 812
19.1.58 AECC—Advanced Error Capabilities and Control Register
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7)..................................... 813
19.1.59 RES—Root Error Status Register
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7)..................................... 813
19.1.60 PECR2—PCI Express* Configuration Register 2
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7)..................................... 814
19.1.61 PEETM—PCI Express* Extended Test Mode Register
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7)..................................... 814
19.1.62 PEC1—PCI Express* Configuration Register 1
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7)..................................... 814
20 High Precision Event Timer Registers .................................................................... 815
20.1 Memory Mapped Registers................................................................................ 815
20.1.1 GCAP_ID—General Capabilities and Identification Register ...................... 817
20.1.2 GEN_CONF—General Configuration Register.......................................... 817
20.1.3 GINTR_STA—General Interrupt Status Register ..................................... 818
20.1.4 MAIN_CNT—Main Counter Value Register ............................................. 818
20.1.5 TIMn_CONF—Timer n Configuration and Capabilities Register.................. 819
20.1.6 TIMn_COMP—Timer n Comparator Value Register .................................. 821
21 Serial Peripheral Interface (SPI) ........................................................................... 823
21.1 Serial Peripheral Interface Memory Mapped Configuration Registers ....................... 823
21.1.1 BFPR –BIOS Flash Primary Region Register
(SPI Memory Mapped Configuration Registers) ...................................... 824
21.1.2 HSFS—Hardware Sequencing Flash Status Register
(SPI Memory Mapped Configuration Registers) ...................................... 825
21.1.3 HSFC—Hardware Sequencing Flash Control Register
(SPI Memory Mapped Configuration Registers) ...................................... 827
21.1.4 FADDR—Flash Address Register
(SPI Memory Mapped Configuration Registers) ...................................... 827
21.1.5 FDATA0—Flash Data 0 Register
(SPI Memory Mapped Configuration Registers) ...................................... 828
21.1.6 FDATAN—Flash Data [N] Register
(SPI Memory Mapped Configuration Registers) ...................................... 828
21.1.7 FRAP—Flash Regions Access Permissions Register
(SPI Memory Mapped Configuration Registers) ...................................... 829
21.1.8 FREG0—Flash Region 0 (Flash Descriptor) Register
(SPI Memory Mapped Configuration Registers) ...................................... 830
21.1.9 FREG1—Flash Region 1 (BIOS Descriptor) Register
(SPI Memory Mapped Configuration Registers) ...................................... 830
21.1.10 FREG2—Flash Region 2 (Intel® ME) Register
(SPI Memory Mapped Configuration Registers) ...................................... 831
21.1.11 FREG3—Flash Region 3 (GbE) Register
(SPI Memory Mapped Configuration Registers) ...................................... 831
21.1.12 FREG4—Flash Region 4 (Platform Data) Register
(SPI Memory Mapped Configuration Registers) ...................................... 832
21.1.13 PR0—Protected Range 0 Register
(SPI Memory Mapped Configuration Registers) ...................................... 832
21.1.14 PR1—Protected Range 1 Register
(SPI Memory Mapped Configuration Registers) ...................................... 833
21.1.15 PR2—Protected Range 2 Register
(SPI Memory Mapped Configuration Registers) ...................................... 834
21.1.16 PR3—Protected Range 3 Register
(SPI Memory Mapped Configuration Registers) ...................................... 835
21.1.17 PR4—Protected Range 4 Register
(SPI Memory Mapped Configuration Registers) ...................................... 836
21.1.18 SSFS—Software Sequencing Flash Status Register
(SPI Memory Mapped Configuration Registers) ...................................... 837
21.1.19 SSFC—Software Sequencing Flash Control Register
(SPI Memory Mapped Configuration Registers) ...................................... 838
26 Datasheet
21.1.20 PREOP—Prefix Opcode Configuration Register
(SPI Memory Mapped Configuration Registers) ...................................... 839
21.1.21 OPTYPE—Opcode Type Configuration Register
(SPI Memory Mapped Configuration Registers) ...................................... 839
21.1.22 OPMENU—Opcode Menu Configuration Register
(SPI Memory Mapped Configuration Registers) ...................................... 840
21.1.23 BBAR—BIOS Base Address Configuration Register
(SPI Memory Mapped Configuration Registers) ...................................... 841
21.1.24 FDOC—Flash Descriptor Observability Control Register
(SPI Memory Mapped Configuration Registers) ...................................... 841
21.1.25 FDOD—Flash Descriptor Observability Data Register
(SPI Memory Mapped Configuration Registers) ...................................... 842
21.1.26 AFC—Additional Flash Control Register
(SPI Memory Mapped Configuration Registers) ...................................... 842
21.1.27 LVSCC—Host Lower Vendor Specific Component
Capabilities Register
(SPI Memory Mapped Configuration Registers) ...................................... 842
21.1.28 UVSCC—Host Upper Vendor Specific Component
Capabilities Register
(SPI Memory Mapped Configuration Registers) ...................................... 844
21.1.29 FPB—Flash Partition Boundary Register
(SPI Memory Mapped Configuration Registers) ...................................... 845
21.2 Flash Descriptor Records................................................................................... 845
21.3 OEM Section ...................................................................................................846
21.4 GbE SPI Flash Program Registers ....................................................................... 846
21.4.1 GLFPR –Gigabit LAN Flash Primary Region Register
(GbE LAN Memory Mapped Configuration Registers) ............................... 847
21.4.2 HSFS—Hardware Sequencing Flash Status Register
(GbE LAN Memory Mapped Configuration Registers) ............................... 847
21.4.3 HSFC—Hardware Sequencing Flash Control Register
(GbE LAN Memory Mapped Configuration Registers) ............................... 849
21.4.4 FADDR—Flash Address Register
(GbE LAN Memory Mapped Configuration Registers) ............................... 850
21.4.5 FDATA0—Flash Data 0 Register
(GbE LAN Memory Mapped Configuration Registers) ............................... 850
21.4.6 FRAP—Flash Regions Access Permissions Register
(GbE LAN Memory Mapped Configuration Registers) ............................... 851
21.4.7 FREG0—Flash Region 0 (Flash Descriptor) Register
(GbE LAN Memory Mapped Configuration Registers) ............................... 852
21.4.8 FREG1—Flash Region 1 (BIOS Descriptor) Register
(GbE LAN Memory Mapped Configuration Registers) ............................... 852
21.4.9 FREG2—Flash Region 2 (Intel® ME) Register
(GbE LAN Memory Mapped Configuration Registers) ............................... 852
21.4.10 FREG3—Flash Region 3 (GbE) Register
(GbE LAN Memory Mapped Configuration Registers) ............................... 853
21.4.11 PR0—Protected Range 0 Register
(GbE LAN Memory Mapped Configuration Registers) ............................... 853
21.4.12 PR1—Protected Range 1 Register
(GbE LAN Memory Mapped Configuration Registers) ............................... 854
21.4.13 SSFS—Software Sequencing Flash Status Register
(GbE LAN Memory Mapped Configuration Registers) ............................... 855
21.4.14 SSFC—Software Sequencing Flash Control Register
(GbE LAN Memory Mapped Configuration Registers) ............................... 856
21.4.15 PREOP—Prefix Opcode Configuration Register
(GbE LAN Memory Mapped Configuration Registers) ............................... 857
21.4.16 OPTYPE—Opcode Type Configuration Register
(GbE LAN Memory Mapped Configuration Registers) ............................... 857
21.4.17 OPMENU—Opcode Menu Configuration Register
(GbE LAN Memory Mapped Configuration Registers) ............................... 858
22 Thermal Sensor Registers (D31:F6) ....................................................................... 859
22.1 PCI Bus Configuration Registers.........................................................................859
22.1.1 VID—Vendor Identification Register......................................................860
22.1.2 DID—Device Identification Register ......................................................860
22.1.3 CMD—Command Register ...................................................................860
22.1.4 STS—Status Register .........................................................................861
22.1.5 RID—Revision Identification Register .................................................... 861
Datasheet 27
22.1.6 PI—Programming Interface Register .................................................... 861
22.1.7 SCC—Sub Class Code Register ............................................................ 862
22.1.8 BCC—Base Class Code Register........................................................... 862
22.1.9 CLS—Cache Line Size Register ............................................................ 862
22.1.10 LT—Latency Timer Register ................................................................ 862
22.1.11 HTYPE—Header Type Register............................................................. 862
22.1.12 TBAR—Thermal Base Register ............................................................. 863
22.1.13 TBARH—Thermal Base High DWord Register ......................................... 863
22.1.14 SVID—Subsystem Vendor ID Register .................................................. 864
22.1.15 SID—Subsystem ID Register............................................................... 864
22.1.16 CAP_PTR—Capabilities Pointer Register ................................................ 864
22.1.17 Offset 3Ch – INTLN—Interrupt Line Register ......................................... 865
22.1.18 INTPN—Interrupt Pin Register ............................................................. 865
22.1.19 TBARB—BIOS Assigned Thermal Base Address Register.......................... 865
22.1.20 TBARBH—BIOS Assigned Thermal Base High DWord
Register ........................................................................................... 866
22.1.21 PID—PCI Power Management Capability ID Register............................... 866
22.1.22 PC—Power Management Capabilities Register........................................ 866
22.1.23 PCS—Power Management Control And Status Register ........................... 867
22.2 Thermal Memory Mapped Configuration Registers
(Thermal Sensor – D31:F26) ............................................................................ 868
22.2.1 TSIU—Thermal Sensor In Use Register................................................. 869
22.2.2 TSE—Thermal Sensor Enable Register.................................................. 869
22.2.3 TSS—Thermal Sensor Status Register .................................................. 870
22.2.4 TSTR—Thermal Sensor Thermometer Read Register............................... 870
22.2.5 TSTTP—Thermal Sensor Temperature Trip Point Register ........................ 871
22.2.6 TSCO—Thermal Sensor Catastrophic Lock-Down Register ....................... 871
22.2.7 TSES—Thermal Sensor Error Status Register ........................................ 872
22.2.8 TSGPEN—Thermal Sensor General Purpose Event
Enable Register................................................................................. 873
22.2.9 TSPC—Thermal Sensor Policy Control Register ...................................... 874
22.2.10 PPEC—Processor Power Error Correction Register
(Mobile Only).................................................................................... 874
22.2.11 CTA—Processor Core Temperature Adjust Register................................. 875
22.2.12 PTA—PCH Temperature Adjust Register................................................ 875
22.2.13 MGTA—Memory Controller/Graphics Temperature
Adjust Register ................................................................................. 875
22.2.14 TRC—Thermal Reporting Control Register ............................................. 876
22.2.15 TES—Turbo Interrupt Status Register (Mobile Only) ............................... 877
22.2.16 TEN—Turbo Interrupt Enable Register (Mobile Only)............................... 877
22.2.17 PSC—Power Sharing Configuration Register (Mobile Only)....................... 877
22.2.18 CTV1—Core Temperature Value 1 Register ........................................... 878
22.2.19 CTV2—Core Temperature Value 2 Register ........................................... 878
22.2.20 CEV1—Core Energy Value Register ...................................................... 878
22.2.21 AE—Alert Enable Register ................................................................... 879
22.2.22 HTS—Host Status Register (Mobile Only) .............................................. 879
22.2.23 PTL—Processor Temperature Limit Register (Mobile Only) ....................... 880
22.2.24 MGTV—Memory Controller/Graphics Temperature
Value Register .................................................................................. 880
22.2.25 PTV—Processor Temperature Value Register ......................................... 880
22.2.26 MMGPC—Max Memory Controller/Graphics Power Clamp
Register (Mobile Only) ....................................................................... 880
22.2.27 MPPC—Max Processor Power Clamp Register (Mobile Only) ..................... 881
22.2.28 MPCPC—Max Processor Core Power Clamp Register
(Mobile Only).................................................................................... 881
22.2.29 TSPIEN—Thermal Sensor PCI Interrupt Enable Register.......................... 882
22.2.30 TSLOCK—Thermal Sensor Register Lock Control Register........................ 883
22.2.31 STS—Turbo Status (Mobile Only)......................................................... 883
22.2.32 SEC—Event Clear Register (Mobile Only) .............................................. 883
22.2.33 TC3—Thermal Compares 3 Register ..................................................... 883
22.2.34 TC1—Thermal Compares 1 Register ..................................................... 884
22.2.35 TC2—Thermal Compares 2 Register ..................................................... 885
22.2.36 DTV—DIMM Temperature Values Register............................................. 885
22.2.37 ITV—Internal Temperature Values Register........................................... 886
23 Intel® Management Engine Interface (MEI) Subsystem Registers (D22:F0).......... 887
28 Datasheet
23.1 First Intel® Management Engine Interface (Intel® MEI) Configuration Registers
(MEI—D22:F0) ................................................................................................ 887
23.1.1 VID—Vendor Identification Register
(MEI—D22:F0) .................................................................................. 888
23.1.2 DID—Device Identification Register
(MEI—D22:F0) .................................................................................. 888
23.1.3 PCICMD—PCI Command Register
(MEI—D22:F0) .................................................................................. 889
23.1.4 PCISTS—PCI Status Register
(MEI—D22:F0) .................................................................................. 889
23.1.5 RID—Revision Identification Register
(MEI—D22:F0) .................................................................................. 890
23.1.6 CC—Class Code Register
(MEI—D22:F0) .................................................................................. 890
23.1.7 HTYPE—Header Type Register
(MEI—D22:F0) .................................................................................. 890
23.1.8 MEI0_MBAR—MEI0 MMIO Base Address Register
(MEI—D22:F0) .................................................................................. 891
23.1.9 SVID—Subsystem Vendor ID Register
(MEI—D22:F0) .................................................................................. 891
23.1.10 SID—Subsystem ID Register
(MEI—D22:F0) .................................................................................. 891
23.1.11 CAPP—Capabilities List Pointer Register
(MEI—D22:F0) .................................................................................. 892
23.1.12 INTR—Interrupt Information Register
(MEI—D22:F0) .................................................................................. 892
23.1.13 HFS—Host Firmware Status Register
(MEI—D22:F0) .................................................................................. 892
23.1.14 ME_UMA—Management Engine UMA Register
(MEI—D22:F0) .................................................................................. 893
23.1.15 GMES—General ME Status Register
(MEI—D22:F0) .................................................................................. 893
23.1.16 H_GS—Host General Status Register
(MEI—D22:F0) .................................................................................. 893
23.1.17 PID—PCI Power Management Capability ID Register
(MEI—D22:F0) .................................................................................. 894
23.1.18 PC—PCI Power Management Capabilities Register
(MEI—D22:F0) .................................................................................. 894
23.1.19 PMCS—PCI Power Management Control and Status
Register (MEI—D22:F0)...................................................................... 895
23.1.20 MID—Message Signaled Interrupt Identifiers Register
(MEI—D22:F0) .................................................................................. 895
23.1.21 MC—Message Signaled Interrupt Message Control Register
(MEI—D22:F0) .................................................................................. 896
23.1.22 MA—Message Signaled Interrupt Message Address
Register (MEI—D22:F0)...................................................................... 896
23.1.23 MUA—Message Signaled Interrupt Upper Address Register
(MEI—D22:F0) .................................................................................. 896
23.1.24 MD—Message Signaled Interrupt Message Data Register
(MEI—D22:F0) .................................................................................. 896
23.1.25 HIDM—MEI Interrupt Delivery Mode Register
(MEI—D22:F0) .................................................................................. 897
23.1.26 HERES—MEI Extend Register Status
(MEI—D22:F0) .................................................................................. 897
23.1.27 HERX—MEI Extend Register DWX
(MEI—D22:F0) .................................................................................. 898
23.2 Second Management Engine Interface(MEI1) Configuration Registers
(MEI—D22:F1) ................................................................................................ 899
23.2.1 VID—Vendor Identification Register
(MEI—D22:F1) .................................................................................. 900
23.2.2 DID—Device Identification Register
(MEI—D22:F1) .................................................................................. 900
23.2.3 PCICMD—PCI Command Register
(MEI—D22:F1) .................................................................................. 900
23.2.4 PCISTS—PCI Status Register
(MEI—D22:F1) .................................................................................. 901
Datasheet 29
23.2.5 RID—Revision Identification Register
(MEI—D22:F1).................................................................................. 901
23.2.6 CC—Class Code Register
(MEI—D22:F1).................................................................................. 901
23.2.7 HTYPE—Header Type Register
(MEI—D22:F1).................................................................................. 902
23.2.8 MEI_MBAR—MEI MMIO Base Address Register
(MEI—D22:F1).................................................................................. 902
23.2.9 SVID—Subsystem Vendor ID Register
(MEI—D22:F1).................................................................................. 902
23.2.10 SID—Subsystem ID Register
(MEI—D22:F1).................................................................................. 903
23.2.11 CAPP—Capabilities List Pointer Register
(MEI—D22:F1).................................................................................. 903
23.2.12 INTR—Interrupt Information Register
(MEI—D22:F1).................................................................................. 903
23.2.13 HFS—Host Firmware Status Register
(MEI—D22:F1).................................................................................. 903
23.2.14 GMES—General ME Status Register
(MEI—D22:F1).................................................................................. 904
23.2.15 H_GS—Host General Status Register
(MEI—D22:F1).................................................................................. 904
23.2.16 PID—PCI Power Management Capability ID Register
(MEI—D22:F1).................................................................................. 904
23.2.17 PC—PCI Power Management Capabilities Register
(MEI—D22:F1).................................................................................. 905
23.2.18 PMCS—PCI Power Management Control and Status
Register (MEI—D22:F1) ..................................................................... 906
23.2.19 MID—Message Signaled Interrupt Identifiers Register
(MEI—D22:F1).................................................................................. 906
23.2.20 MC—Message Signaled Interrupt Message Control Register
(MEI—D22:F1).................................................................................. 907
23.2.21 MA—Message Signaled Interrupt Message Address
Register (MEI—D22:F1) ..................................................................... 907
23.2.22 MUA—Message Signaled Interrupt Upper Address Register
(MEI—D22:F1).................................................................................. 907
23.2.23 MD—Message Signaled Interrupt Message Data Register
(MEI—D22:F1).................................................................................. 907
23.2.24 HIDM—MEI Interrupt Delivery Mode Register
(MEI—D22:F1).................................................................................. 908
23.2.25 HERES—MEI Extend Register Status
(MEI—D22:F1).................................................................................. 908
23.2.26 HERX—MEI Extend Register DWX
(MEI—D22:F1).................................................................................. 909
23.3 MEI0_MBAR—MEI0 MMIO Registers ................................................................... 909
23.3.1 H_CB_WW—Host Circular Buffer Write Window Register
(MEI MMIO Register) ......................................................................... 910
23.3.2 H_CSR—Host Control Status Register
(MEI MMIO Register) ......................................................................... 910
23.3.3 ME_CB_RW—ME Circular Buffer Read Window Register
(MEI MMIO Register) ......................................................................... 911
23.3.4 ME CSR_HA—ME Control Status Host Access Register
(MEI MMIO Register) ......................................................................... 911
23.4 MEI1_MBAR—MEI0 MMIO Registers ................................................................... 912
23.4.1 H_CB_WW—Host Circular Buffer Write Window Register
(MEI MMIO Register) ......................................................................... 912
23.4.2 H_CSR—Host Control Status Register
(MEI MMIO Register) ......................................................................... 913
23.4.3 ME_CB_RW—ME Circular Buffer Read Window Register
(MEI MMIO Register) ......................................................................... 914
23.4.4 ME CSR_HA—ME Control Status Host Access Register
(MEI MMIO Register) ......................................................................... 914
23.5 IDE Function for Remote Boot and Installations
PT IDER Registers (IDER—D22:F2) .................................................................... 915
23.5.1 VID—Vendor Identification Register (IDER—D22:F2) .............................. 916
23.5.2 DID—Device Identification Register (IDER—D22:F2) .............................. 916
23.5.3 PCICMD—PCI Command Register (IDER—D22:F2) ................................. 916
30 Datasheet
23.5.4 PCISTS—PCI Device Status Register (IDER—D22:F2) ............................. 917
23.5.5 RID—Revision Identification Register (IDER—D22:F2)............................. 917
23.5.6 CC—Class Codes Register (IDER—D22:F2) ............................................917
23.5.7 CLS—Cache Line Size Register (IDER—D22:F2) ..................................... 918
23.5.8 PCMDBA—Primary Command Block IO Bar Register
(IDER—D22:F2) ................................................................................ 918
23.5.9 PCTLBA—Primary Control Block Base Address Register
(IDER—D22:F2) ................................................................................ 918
23.5.10 SCMDBA—Secondary Command Block Base Address
Register (IDER—D22:F2) ....................................................................919
23.5.11 SCTLBA—Secondary Control Block base Address
Register (IDER—D22:F2) ....................................................................919
23.5.12 LBAR—Legacy Bus Master Base Address Register
(IDER—D22:F2) ................................................................................ 919
23.5.13 SVID—Subsystem Vendor ID Register (IDER—D22:F2) ........................... 920
23.5.14 SID—Subsystem ID Register (IDER—D22:F2)........................................ 920
23.5.15 CAPP—Capabilities List Pointer Register
(IDER—D22:F2) ................................................................................ 920
23.5.16 INTR—Interrupt Information Register
(IDER—D22:F2) ................................................................................ 920
23.5.17 PID—PCI Power Management Capability ID Register
(IDER—D22:F2) ................................................................................ 921
23.5.18 PC—PCI Power Management Capabilities Register
(IDER—D22:F2) ................................................................................ 921
23.5.19 PMCS—PCI Power Management Control and Status
Register (IDER—D22:F2) ....................................................................922
23.5.20 MID—Message Signaled Interrupt Capability ID
Register (IDER—D22:F2) ....................................................................922
23.5.21 MC—Message Signaled Interrupt Message Control
Register (IDER—D22:F2) ....................................................................923
23.5.22 MA—Message Signaled Interrupt Message Address
Register (IDER—D22:F2) ....................................................................923
23.5.23 MAU—Message Signaled Interrupt Message Upper
Address Register (IDER—D22:F2) ........................................................923
23.5.24 MD—Message Signaled Interrupt Message Data
Register (IDER—D22:F2) ....................................................................924
23.6 IDE BAR0 .......................................................................................................924
23.6.1 IDEDATA—IDE Data Register (IDER—D22:F2) ....................................... 925
23.6.2 IDEERD1—IDE Error Register DEV1
(IDER—D22:F2) ................................................................................ 925
23.6.3 IDEERD0—IDE Error Register DEV0
(IDER—D22:F2) ................................................................................ 925
23.6.4 IDEFR—IDE Features Register
(IDER—D22:F2) ................................................................................ 926
23.6.5 IDESCIR—IDE Sector Count In Register
(IDER—D22:F2) ................................................................................ 926
23.6.6 IDESCOR1—IDE Sector Count Out Register Device 1
Register (IDER—D22:F2) ....................................................................926
23.6.7 IDESCOR0—IDE Sector Count Out Register Device
0 Register (IDER—D22:F2) ................................................................. 927
23.6.8 IDESNOR0—IDE Sector Number Out Register
Device 0 Register (IDER—D22:F2) ....................................................... 927
23.6.9 IDESNOR1—IDE Sector Number Out Register
Device 1 Register (IDER—D22:F2) ....................................................... 927
23.6.10 IDESNIR—IDE Sector Number In Register Register
(IDER—D22:F2) ................................................................................ 928
23.6.11 IDECLIR—IDE Cylinder Low In Register Register
(IDER—D22:F2) ................................................................................ 928
23.6.12 IDCLOR1—IDE Cylinder Low Out Register Device 1
Register (IDER—D22:F2) ....................................................................928
23.6.13 IDCLOR0—IDE Cylinder Low Out Register Device 0
Register (IDER—D22:F2) ....................................................................929
23.6.14 IDCHOR0—IDE Cylinder High Out Register Device 0
Register (IDER—D22:F2) ....................................................................929
23.6.15 IDCHOR1—IDE Cylinder High Out Register Device 1
Register (IDER—D22:F2) ....................................................................929
Datasheet 31
23.6.16 IDECHIR—IDE Cylinder High In Register
(IDER—D22:F2) ................................................................................ 930
23.6.17 IDEDHIR—IDE Drive/Head In Register
(IDER—D22:F2) ................................................................................ 930
23.6.18 IDDHOR1—IDE Drive Head Out Register Device 1
Register (IDER—D22:F2).................................................................... 931
23.6.19 IDDHOR0—IDE Drive Head Out Register Device 0
Register (IDER—D22:F2).................................................................... 931
23.6.20 IDESD0R—IDE Status Device 0 Register
(IDER—D22:F2) ................................................................................ 932
23.6.21 IDESD1R—IDE Status Device 1 Register
(IDER—D22:F2) ................................................................................ 933
23.6.22 IDECR—IDE Command Register (IDER—D22:F2) ................................... 933
23.7 IDE BAR1 ....................................................................................................... 934
23.7.1 IDDCR—IDE Device Control Register (IDER—D22:F2)............................. 934
23.7.2 IDASR—IDE Alternate status Register (IDER—D22:F2) ........................... 934
23.8 IDE BAR4 ....................................................................................................... 935
23.8.1 IDEPBMCR—IDE Primary Bus Master Command
Register (IDER—D22:F2).................................................................... 936
23.8.2 IDEPBMDS0R—IDE Primary Bus Master Device
Specific 0 Register (IDER—D22:F2) ..................................................... 936
23.8.3 IDEPBMSR—IDE Primary Bus Master Status
Register (IDER—D22:F2).................................................................... 937
23.8.4 IDEPBMDS1R—IDE Primary Bus Master Device
Specific 1 Register (IDER—D22:F2) ..................................................... 937
23.8.5 IDEPBMDTPR0—IDE Primary Bus Master Descriptor
Table Pointer Byte 0 Register (IDER—D22:F2)....................................... 938
23.8.6 IDEPBMDTPR1—IDE Primary Bus Master Descriptor
Table Pointer Byte 1 Register (IDER—D22:F2)....................................... 938
23.8.7 IDEPBMDTPR2—IDE Primary Bus Master Descriptor
Table Pointer Byte 2 Register (IDER—D22:F2)....................................... 938
23.8.8 IDEPBMDTPR3—IDE Primary Bus Master Descriptor
Table Pointer Byte 3 Register (IDER—D22:F2)....................................... 938
23.8.9 IDESBMCR—IDE Secondary Bus Master Command
Register (IDER—D22:F2).................................................................... 939
23.8.10 IDESBMDS0R—IDE Secondary Bus Master Device
Specific 0 Register (IDER—D22:F2) ..................................................... 939
23.8.11 IDESBMSR—IDE Secondary Bus Master Status
Register (IDER—D22:F2).................................................................... 940
23.8.12 IDESBMDS1R—IDE Secondary Bus Master Device
Specific 1 Register (IDER—D22:F2) ..................................................... 940
23.8.13 IDESBMDTPR0—IDE Secondary Bus Master Descriptor
Table Pointer Byte 0 Register (IDER—D22:F2)....................................... 940
23.8.14 IDESBMDTPR1—IDE Secondary Bus Master Descriptor
Table Pointer Byte 1 Register (IDER—D22:F2)....................................... 941
23.8.15 IDESBMDTPR2—IDE Secondary Bus Master Descriptor
Table Pointer Byte 2 Register (IDER—D22:F2)....................................... 941
23.8.16 IDESBMDTPR3—IDE Secondary Bus Master Descriptor
Table Pointer Byte 3 Register (IDER—D22:F2)....................................... 941
23.9 Serial Port for Remote Keyboard and Text (KT)
Redirection (KT—D22:F3)................................................................................. 942
23.9.1 VVID—Vendor Identification Register (KT—D22:F3) ............................... 943
23.9.2 DID—Device Identification Register (KT—D22:F3).................................. 943
23.9.3 CMD—Command Register Register (KT—D22:F3)................................... 943
23.9.4 STS—Device Status Register (KT—D22:F3)........................................... 944
23.9.5 RID—Revision ID Register (KT—D22:F3) .............................................. 944
23.9.6 CC—Class Codes Register (KT—D22:F3)............................................... 944
23.9.7 CLS—Cache Line Size Register (KT—D22:F3) ........................................ 945
23.9.8 KTIBA—KT IO Block Base Address Register
(KT—D22:F3) ................................................................................... 945
23.9.9 KTMBA—KT Memory Block Base Address Register
(KT—D22:F3) ................................................................................... 945
23.9.10 SVID—Subsystem Vendor ID Register (KT—D22:F3) .............................. 946
23.9.11 SID—Subsystem ID Register (KT—D22:F3)........................................... 946
23.9.12 CAP—Capabilities Pointer Register (KT—D22:F3) ................................... 946
23.9.13 INTR—Interrupt Information Register (KT—D22:F3)............................... 946
32 Datasheet
23.9.14 PID—PCI Power Management Capability ID Register
(KT—D22:F3).................................................................................... 947
23.9.15 PC—PCI Power Management Capabilities ID Register
(KT—D22:F3).................................................................................... 947
23.9.16 MID—Message Signaled Interrupt Capability ID
Register (KT—D22:F3) ....................................................................... 947
23.9.17 MC—Message Signaled Interrupt Message Control
Register (KT—D22:F3) ....................................................................... 948
23.9.18 MA—Message Signaled Interrupt Message Address
Register (KT—D22:F3) ....................................................................... 948
23.9.19 MAU—Message Signaled Interrupt Message Upper
Address Register (KT—D22:F3) ........................................................... 948
23.9.20 MD—Message Signaled Interrupt Message Data
Register (KT—D22:F3) ....................................................................... 949
23.10 KT IO/ Memory Mapped Device Registers ............................................................ 949
23.10.1 KTRxBR—KT Receive Buffer Register (KT—D23:F3) ................................ 950
23.10.2 KTTHR—KT Transmit Holding Register (KT—D23:F3) ..............................950
23.10.3 KTDLLR—KT Divisor Latch LSB Register (KT—D23:F3) ............................951
23.10.4 KTIER—KT Interrupt Enable Register (KT—D23:F3) ................................ 951
23.10.5 KTDLMR—KT Divisor Latch MSB Register (KT—D23:F3)........................... 952
23.10.6 KTIIR—KT Interrupt Identification Register
(KT—D23:F3).................................................................................... 952
23.10.7 KTFCR—KT FIFO Control Register (KT—D23:F3)..................................... 953
23.10.8 KTLCR—KT Line Control Register (KT—D23:F3)......................................953
23.10.9 KTMCR—KT Modem Control Register (KT—D23:F3) ................................ 954
23.10.10 KTLSR—KT Line Status Register (KT—D23:F3).......................................955
23.10.11 KTMSR—KT Modem Status Register (KT—D23:F3)..................................956
Figures
2-1 PCH Interface Signals Block Diagram ......................................................................60
2-2 Example External RTC Circuit.................................................................................97
4-1 PCH High-Level Clock Diagram............................................................................. 121
5-1 Generation of SERR# to Platform .........................................................................130
5-2 LPC Interface Diagram ........................................................................................140
5-3 PCH DMA Controller............................................................................................ 144
5-4 DMA Request Assertion through LDRQ# ................................................................ 147
5-5 TCO Legacy/Compatible Mode SMBus Configuration ................................................ 194
5-6 Advanced TCO Mode...........................................................................................196
5-7 Serial Post over GPIO Reference Circuit ................................................................. 198
5-8 Flow for Port Enable / Device Present Bits..............................................................206
5-9 Serial Data transmitted over the SGPIO Interface ................................................... 210
5-10 EHCI with USB 2.0 with Rate Matching Hub ........................................................... 226
5-11 PCH Intel® Management Engine High-Level Block Diagram ...................................... 256
5-12 Flash Partition Boundary ..................................................................................... 260
5-13 Flash Descriptor Sections .................................................................................... 261
5-14 Analog Port Characteristics .................................................................................. 270
5-15 LVDS Signals and Swing Voltage ..........................................................................272
5-16 LVDS Clock and Data Relationship ........................................................................ 272
5-17 Panel Power Sequencing ..................................................................................... 273
5-18 HDMI Overview..................................................................................................274
5-19 DP Overview...................................................................................................... 275
5-20 SDVO Conceptual Block Diagram.......................................................................... 277
6-1 PCH Ballout (top view—left side) (Desktop) ...........................................................284
6-2 PCH Ballout (top view—right side) (Desktop) ......................................................... 285
6-3 PCH ballout (top View—Leff side) (Mobile Only) ...................................................... 295
6-4 PCH ballout (top View—right side) (Mobile Only)..................................................... 296
6-5 PCH ballout (top view—left side) (Mobile SFF Only) .................................................307
6-6 PCH ballout (top view—right side) (Mobile SFF Only)............................................... 308
7-1 PCH Desktop Package Drawing............................................................................. 320
7-2 PCH B-Step Mobile Package Drawing.....................................................................322
7-3 PCH Mobile SFF Package Drawing ......................................................................... 324
8-1 G3 w/RTC Loss to S4/S5 Timing Diagram .............................................................. 363
8-2 S5 to S0 Timing Diagram ....................................................................................363
Datasheet 33
8-3 S3/M3 to S0 Timing Diagram............................................................................... 364
8-4 S5/Moff - S5/M3 Timing Diagram ......................................................................... 364
8-5 S0 to S5 Timing Diagram.................................................................................... 365
8-6 DRAMPWRGD Timing Diagram ............................................................................. 365
8-7 Clock Cycle Time ............................................................................................... 366
8-8 Transmitting Position (Data to Strobe).................................................................. 366
8-9 Clock Timing ..................................................................................................... 366
8-11 Setup and Hold Times ........................................................................................ 367
8-12 Float Delay ....................................................................................................... 367
8-13 Pulse Width....................................................................................................... 367
8-10 Valid Delay from Rising Clock Edge ...................................................................... 367
8-14 Output Enable Delay .......................................................................................... 368
8-15 USB Rise and Fall Times ..................................................................................... 368
8-16 USB Jitter ......................................................................................................... 368
8-17 USB EOP Width ................................................................................................. 369
8-18 SMBus/SMLINK Transaction ................................................................................ 369
8-19 SMBus/SMLINK Timeout ..................................................................................... 369
8-20 SPI Timings ...................................................................................................... 370
8-21 Intel® High Definition Audio Input and Output Timings ........................................... 370
8-22 Dual Channel Interface Timings ........................................................................... 371
8-23 Dual Channel Interface Timings ........................................................................... 371
8-24 LVDS Load and Transition Times .......................................................................... 371
8-25 Transmitting Position (Data to Strobe).................................................................. 372
8-26 PCI Express Transmitter Eye ............................................................................... 372
8-27 PCI Express Receiver Eye.................................................................................... 373
8-28 Measurement Points for Differential Waveforms. .................................................... 374
8-29 PCH Test Load................................................................................................... 375
8-30 Controller Link Receive Timings ........................................................................... 375
8-31 Controller Link Receive Slew Rate ........................................................................ 375
Tables
1-1 Industry Specifications ......................................................................................... 44
1-2 PCI Devices and Functions .................................................................................... 48
1-3 Intel® 5 Series Chipset Desktop SKUs .................................................................... 55
1-4 Intel® 5 Series Chipset Mobile SKUs....................................................................... 56
1-5 Intel® 3400 Series Chipset Server SKUs ................................................................. 57
2-1 Direct Media Interface Signals ............................................................................... 61
2-2 PCI Express* Signals............................................................................................ 61
2-3 Firmware Hub Interface Signals ............................................................................. 62
2-4 PCI Interface Signals............................................................................................ 63
2-5 Serial ATA Interface Signals .................................................................................. 65
2-6 LPC Interface Signals ........................................................................................... 68
2-7 Interrupt Signals ................................................................................................. 68
2-8 USB Interface Signals........................................................................................... 69
2-9 Power Management Interface Signals ..................................................................... 71
2-10 Processor Interface Signals ................................................................................... 74
2-11 SM Bus Interface Signals ...................................................................................... 74
2-12 System Management Interface Signals ................................................................... 75
2-13 Real Time Clock Interface ..................................................................................... 75
2-14 Miscellaneous Signals ........................................................................................... 76
2-15 Intel® High Definition Audio Link Signals................................................................. 77
2-16 Controller Link Signals.......................................................................................... 78
2-17 Serial Peripheral Interface (SPI) Signals.................................................................. 78
2-18 Intel® Quiet System Technology Signals ................................................................. 79
2-19 JTAG Signals ....................................................................................................... 80
2-20 Clock Interface Signals ......................................................................................... 80
2-21 LVDS Interface Signals ......................................................................................... 82
2-22 Analog Display Interface Signals ............................................................................ 83
2-23 Intel® Flexible Display Interface Signals ................................................................. 84
2-24 Digital Display Interface Signals............................................................................. 84
2-25 General Purpose I/O Signals.................................................................................. 87
2-26 Manageability Signals ........................................................................................... 90
2-27 Power and Ground Signals .................................................................................... 91
2-28 Functional Strap Definitions................................................................................... 93
3-1 Integrated Pull-Up and Pull-Down Resistors ............................................................. 99
34 Datasheet
3-2 Power Plane and States for Output and I/O Signals for Desktop Configurations ........... 101
3-3 Power Plane and States for Output and I/O Signals for Mobile Configurations .............106
3-4 Power Plane for Input Signals for Desktop Configurations ........................................112
3-5 Power Plane for Input Signals for Mobile Configurations...........................................115
4-1 PCH System Clock Inputs .................................................................................... 119
4-2 PCH System Clock Outputs ..................................................................................120
5-1 PCI Bridge Initiator Cycle Types ........................................................................... 123
5-2 Type 1 Address Format .......................................................................................126
5-3 MSI versus PCI IRQ Actions ................................................................................. 128
5-4 LAN Mode Support.............................................................................................. 135
5-5 LPC Cycle Types Supported ................................................................................. 140
5-6 Start Field Bit Definitions..................................................................................... 141
5-7 Cycle Type Bit Definitions....................................................................................141
5-8 Transfer Size Bit Definition ..................................................................................141
5-9 SYNC Bit Definition............................................................................................. 142
5-10 DMA Transfer Size..............................................................................................145
5-11 Address Shifting in 16-Bit I/O DMA Transfers .........................................................146
5-12 Counter Operating Modes .................................................................................... 151
5-13 Interrupt Controller Core Connections ................................................................... 153
5-14 Interrupt Status Registers ...................................................................................154
5-15 Content of Interrupt Vector Byte .......................................................................... 154
5-16 APIC Interrupt Mapping1..................................................................................... 160
5-17 Stop Frame Explanation ...................................................................................... 163
5-18 Data Frame Format ............................................................................................ 164
5-19 Configuration Bits Reset by RTCRST# Assertion...................................................... 167
5-20 INIT# Going Active............................................................................................. 169
5-21 NMI Sources......................................................................................................170
5-22 General Power States for Systems Using the PCH ................................................... 171
5-23 State Transition Rules for the PCH ........................................................................ 172
5-24 System Power Plane ...........................................................................................173
5-25 Causes of SMI and SCI .......................................................................................174
5-26 Sleep Types....................................................................................................... 178
5-27 GPI Wake Events ............................................................................................... 180
5-28 Transitions Due to Power Failure ..........................................................................181
5-29 Transitions Due to Power Button .......................................................................... 182
5-30 Transitions Due to RI# Signal ..............................................................................183
5-31 Write Only Registers with Read Paths in ALT Access Mode........................................ 185
5-32 PIC Reserved Bits Return Values .......................................................................... 187
5-33 Register Write Accesses in ALT Access Mode ..........................................................187
5-34 SLP_LAN# Pin Behavior ...................................................................................... 189
5-35 Causes of Host and Global Resets......................................................................... 191
5-36 Event Transitions that Cause Messages .................................................................195
5-37 Multi-activity LED message type...........................................................................209
5-38 Legacy Replacement Routing ...............................................................................212
5-39 Debug Port Behavior........................................................................................... 220
5-40 I2C Block Read................................................................................................... 230
5-41 Enable for SMBALERT# .......................................................................................232
5-42 Enables for SMBus Slave Write and SMBus Host Events ...........................................233
5-43 Enables for the Host Notify Command ................................................................... 233
5-44 Slave Write Registers..........................................................................................234
5-45 Command Types ................................................................................................ 235
5-46 Slave Read Cycle Format..................................................................................... 236
5-47 Data Values for Slave Read Registers.................................................................... 236
5-48 Host Notify Format .............................................................................................239
5-49 I2C Write Commands to the ME............................................................................243
5-50 Block Read Command – Byte Definition.................................................................244
5-51 Processor Core Read Data Definition ..................................................................... 246
5-52 Region Size versus Erase Granularity of Flash Components ...................................... 259
5-53 Region Access Control Table ................................................................................262
5-54 Hardware Sequencing Commands and Opcode Requirements ................................... 265
5-55 Flash Protection Mechanism Summary .................................................................. 266
5-56 Recommended Pinout for 8-Pin Serial Flash Device ................................................. 267
5-57 Recommended Pinout for 16-Pin Serial Flash Device ............................................... 268
5-58 PCH supported Audio formats over HDMI and DisplayPort* ...................................... 276
5-59 PCH Digital Display Port Pin Mapping..................................................................... 278
5-60 Display Co-Existence Table.................................................................................. 279
6-1 PCH Ballout by Signal name (Desktop Only)........................................................... 286
Datasheet 35
6-2 PCH Ballout by Signal name (Mobile Only)............................................................. 297
6-3 PCH Ballout by Signal name (Mobile SFF Only)....................................................... 309
8-1 Storage Conditions............................................................................................. 325
8-2 Mobile Thermal Design Power .............................................................................. 326
8-3 PCH Absolute Maximum Ratings........................................................................... 326
8-4 PCH Power Supply Range.................................................................................... 327
8-5 Measured ICC (Desktop Only) ............................................................................. 327
8-6 Measured ICC (Mobile Only)................................................................................ 328
8-7 Measured ICC (SFF Only)................................................................................... 329
8-8 DC Characteristic Input Signal Association............................................................. 330
8-9 DC Input Characteristics ..................................................................................... 332
8-10 DC Characteristic Output Signal Association .......................................................... 334
8-11 DC Output Characteristics ................................................................................... 337
8-12 Other DC Characteristics..................................................................................... 339
8-13 Signal Groups ................................................................................................... 340
8-14 CRT DAC Signal Group DC Characteristics: Functional Operating Range
(VccADAC = 3.3 V ±5%) .................................................................................... 340
8-15 LVDS Interface: Functional Operating Range (VccALVDS = 3.3 V ±5%) .................... 341
8-16 Display Port Auxiliary Signal Group DC Characteristics ............................................ 341
8-17 PCI Express* Interface Timings ........................................................................... 342
8-18 HDMI Interface Timings (DDP[D:B][3:0]).............................................................. 343
8-19 SDVO Interface Timings...................................................................................... 343
8-20 DisplayPort Interface Timings (DDP[D:B][3:0])...................................................... 344
8-21 DisplayPort Aux Interface ................................................................................... 345
8-22 DDC Characteristics
DDC Signals: CRT_DDC_CLK, CRT_DDC_DATA, L_DDC_CLK, L_DDC_DATA, SDVO_CTRLCLK, SDVO_CTRLDATA, DDP[D:C]_CTRLCLK,
DDP[D:C]_CTRLDATA ....................................................................................................... 345
8-23 LVDS Interface AC characteristics at Various Frequencies ........................................ 346
8-24 CRT DAC AC Characteristics ................................................................................ 348
8-25 Clock Timings.................................................................................................... 348
8-26 PCI Interface Timing .......................................................................................... 352
8-27 Universal Serial Bus Timing................................................................................. 353
8-28 SATA Interface Timings ...................................................................................... 354
8-29 SMBus Timing ................................................................................................... 354
8-30 Intel® High Definition Audio Timing...................................................................... 355
8-31 LPC Timing ....................................................................................................... 355
8-32 Miscellaneous Timings ........................................................................................ 356
8-33 SPI Timings (20 MHz)......................................................................................... 356
8-34 SPI Timings (33 MHz)......................................................................................... 357
8-35 SPI Timings (50 MHz)......................................................................................... 357
8-36 SST Timings...................................................................................................... 358
8-37 PECI Timings..................................................................................................... 359
8-38 Controller Link Receive Timings ........................................................................... 359
8-39 Power Sequencing and Reset Signal Timings.......................................................... 360
9-1 PCI Devices and Functions .................................................................................. 378
9-2 Fixed I/O Ranges Decoded by Intel® PCH.............................................................. 379
9-3 Variable I/O Decode Ranges................................................................................ 382
9-4 Memory Decode Ranges from Processor Perspective ............................................... 383
10-1 Chipset Configuration Register Memory Map (Memory Space) .................................. 387
11-1 PCI Bridge Register Address Map (PCI-PCI—D30:F0) .............................................. 435
12-1 Gigabit LAN Configuration Registers Address Map
(Gigabit LAN—D25:F0) ....................................................................................... 453
13-1 LPC Interface PCI Register Address Map (LPC I/F—D31:F0) ..................................... 467
13-2 DMA Registers................................................................................................... 492
13-3 PIC Registers .................................................................................................... 503
13-4 APIC Direct Registers ......................................................................................... 511
13-5 APIC Indirect Registers....................................................................................... 511
13-6 RTC I/O Registers .............................................................................................. 516
13-7 RTC (Standard) RAM Bank .................................................................................. 517
13-8 Processor Interface PCI Register Address Map ....................................................... 521
13-9 Power Management PCI Register Address Map (PM—D31:F0)................................... 524
13-10 APM Register Map .............................................................................................. 531
13-11 ACPI and Legacy I/O Register Map ....................................................................... 532
13-12 TCO I/O Register Address Map............................................................................. 551
13-13 Registers to Control GPIO Address Map................................................................. 558
14-1 SATA Controller PCI Register Address Map (SATA–D31:F2)...................................... 571
14-2 Bus Master IDE I/O Register Address Map ............................................................. 600
36 Datasheet
14-3 AHCI Register Address Map ................................................................................. 608
14-4 Generic Host Controller Register Address Map ........................................................ 609
14-5 Port [5:0] DMA Register Address Map ................................................................... 619
15-1 SATA Controller PCI Register Address Map (SATA–D31:F5) ......................................637
15-2 Bus Master IDE I/O Register Address Map ............................................................. 655
16-1 USB EHCI PCI Register Address Map (USB EHCI—D29:F0, D26:F0) ........................... 663
16-2 Enhanced Host Controller Capability Registers........................................................ 685
16-3 Enhanced Host Controller Operational Register Address Map .................................... 688
16-4 Debug Port Register Address Map .........................................................................701
17-1 Intel® High Definition Audio PCI Register Address Map
(Intel® High Definition Audio D27:F0) ...................................................................705
17-2 Intel® High Definition Audio PCI Register Address Map
(Intel® High Definition Audio D27:F0) ...................................................................728
18-1 SMBus Controller PCI Register Address Map (SMBus—D31:F3) .................................757
18-2 SMBus I/O and Memory Mapped I/O Register Address Map ......................................764
19-1 PCI Express* Configuration Registers Address Map
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7/) .................................................... 775
20-1 Memory-Mapped Registers ..................................................................................815
21-1 Serial Peripheral Interface (SPI) Register Address Map
(SPI Memory Mapped Configuration Registers) ....................................................... 823
21-2 Gigabit LAN SPI Flash Program Register Address Map
(GbE LAN Memory Mapped Configuration Registers)................................................ 846
22-1 Thermal Sensor Register Address Map...................................................................859
22-2 Thermal Memory Mapped Configuration Register Address Map..................................868
23-1 Intel® MEI Configuration Registers Address Map
(MEI—D22:F0)................................................................................................... 887
23-1 MEI1 Configuration Registers Address Map
(MEI—D22:F1)................................................................................................... 899
23-2 MEI MMIO Register Address Map (VE—D23:F0) ......................................................909
23-3 MEI MMIO Register Address Map (VE—D23:F0) ......................................................912
23-4 IDE Function for remote boot and Installations PT IDER Register Address Map............ 915
23-5 IDE BAR0 Register Address Map ...........................................................................924
23-6 IDE BAR4 Register Address Map ...........................................................................935
23-7 Serial Port for Remote Keyboard and Text (KT) Redirection Register
Address Map......................................................................................................942
23-8 KT IO/ Memory Mapped Device Register Address Map .............................................949
Datasheet 37
Revision History
Revision
Number Description Revision Date
001 Initial release. September 2009
002
SATA Port Multiplier Removal
1.5V On-Die PLL Voltage Regulator Support Removal
Update on Note 9 for Table 2-25, “General Purpose I/O Signal”
Updated GPIO15 and GPIO27 in Table 2-28, “Functional Strap Definition”
Added Measure Icc for SFF Table
Updated Measured Icc for Desktop and Mobile Tables
Updated Table 2-20 CLKOUTFLEX0 type
Updated PCIe Port Configurations
Updated PME_B0_S5_DIS Bit Discription
Updated Section 5.14.2.2 Advanced TCO Mode
Updated Table 9-9 Other DC Characteristics
Updated GCAP_ID Default Value
Updated t240 and t218 Power Sequencing and Reset Signal Timings
Added XTAL25 DC and AC Characteristics
Added CEV1 Core Energy Value 1 Register to Section 22.2
Updated Section 14.4.1.11 VSP - Vendor Specific Default Value
Updated Desktop SKUs Definitions
Added BCLK Input to AC Characteristics
Updated MPC2- Miscellaneous Port Configuration Register 2
Updated DMIC - DMI Control Register Description
Updated NV_CLE Nomical pull-down in Table 3-1. Integrated Pull-ups and Pull-Downs
Updated Section 10.1.62 BUC - Backed Up Control Register
January 2010
003
Addeed Intel® B55 Express Chipset
Updated bit description for USBIRA—USB Initialization Register A
Updated Table 2-29. Intel® 5 Series Chipset and Intel® 3400 Series Chipset Device
and Revision ID Table.
Updated bit description for GP_RST_SEL1 — GPIO Reset Select register
Updated bit description for GP_RST_SEL2 — GPIO Reset Select register
Updated bit description for GP_RST_SEL3 — GPIO Reset Select register
Update Table 3-1 to include SPI_CS0#
Updated Table 8-1, Storage Conditions
Added Section 5.27.2.9 through Section 5.27.2.14
Updated Table 8-14, PCI Express* Interface Timings
Updated Section 21.1.2, HSFS—Hardware Sequencing Flash Status Register
June 2010
38 Datasheet
004
Updated Table 1-1, Industry Standards
Updated Section 1.2, Overview
Updated the initial set of bullets
—Updated Intel
® Active Management Technology Section
Updated Serial Over Lan (SOL) Function Section
—Added KVM Section
Updated IDE-R Function Section
Added PCH Display Interface Section
—Added Intel
® Flexible Display Interconnect (FDI) Section
Updated Table 2-5, Serial ATA Interface Signals
Added TEMP_ALERT# to the SATA5GP /GPIO49 / TEMP_ALERT# Signals
SCLOCK/GPIO22 Signal
Added note under Table 2-7, “Interrupt Signals”
Updated Table 2-8, “USB Interface Signals” Overcurrent Indicators description.
Updated Table 2-9, “Power Management Interface Signals” description for SLP_LAN#/
GPIO29.
Update Table 2-15, “Intel High Definition Audio LInk Signals” description for
HDA_DOCK_RST#/GPIO13.
Added Note 12 to Table 2-25, “General Purpose I/O SIgnals”.
Updated Table 2-27, “Power and Ground Signals” description for DcpSusByp.
Updated Table 2-28, “Functional Strap Definitions” Comment column for GNT3#/
GPIO55.
Updated Table 2-29, “Intel 5 Series Chipset and Intel 3400 Series Chipset Device and
Revision ID Table.
Added Note to Section 5.2, “PCI Express* Root Ports (D28:F0, F1,F2,F3,F4,F5,F6,F7)”.
Added note on wake up settings to Section 5.3.4.1.1, “Advanced Power Management
Wake Up” and Section 5.3.4.1.2, “ACPI Power Management Wake Up”.
Updated Table 5-27, “Causes of Wake Events”.
Added Section 5.13.10.5, “SLP_LAN# Pin Behavior” and Section 5.13.10.6, “RTCRST#
and SRTCRST#”.
Updated Section 5.13.13, “Reset Behavior”.
Updated Section 5.14.2.2, “Advanced TCO Mode”.
Updated Section 5.16.11, “SGPIO Signals”.
Added note to Block Read/Write command in Section 5.20.1.1, “Command Protocols
for the SMBus Host Controller.
Updated Section 5.27, “PCH Display Interfaces”.
Updated Section 8.2, “Absolute Maximum and Minimum Ratings”.
Updated VOL3 and VOH3 in Table 8-10, “DC Output Characteristics”.
Updated VccVRM in Table 8-11, “Other DC Characteristics”. Also, Added Note 3 to the
table.
Added notes to Table 8-16, “PCI Express* Interface Timings”, Table 8-17, “HDMI
Interface Timings”, and Table 8-18, “SDVO Interface Timings“.
Added SMLink0 Clock timings to Table 8-24, “Clock Timings”.
Updated Table 8-28, “SMBus Timing”.
Updated Table 8-37, “Controller Link Receive Timings”.
Added Note 18 to Table 8-18, “Power Sequencing and Reset Signal Timings” for
LAN_RST# timing.
Added Figure 8-30, “Controller Link Receive Timings” and Figure 8-31, “Controller Link
Receive Slew Rate”.
January 2012
Revision
Number Description Revision Date
Datasheet 39
004
Chapter 9, “Register and Memory Mapping”
Added R/WL register access attribute definition and updated the definition for
“Default”.
Added notes to Table 9-1, “PCI Devices and Functions.
Updated Table 9-2, “Fixed I/O Ranges Decoded by Intel PCH”.
Updated Table 9-3, “Variable I/O Decode Ranges”.
Updated Table 9-4, “Memory Decode Ranges from Processor Perspective”.
Updated Section 9.4.1, “Boot-Block Update Scheme”.
Updated Section 10.1.9, “LCAP—Link Capabilities Register” Bits 17:15 L1 Exit Latency
(EL1).
Updated Section 10.1.10, “LCTL—Link Control Register”.
Updated Section 10.1.15, “RPFN—Root Port Function Number and Hide for PCI
Express* Root Ports” for bits 30:28 and 26:24.
Updated Section 10.1.43, “OIC— Other Interrupt Control Register” note below table.
Updated Section 10.1.62, “BUC—Backed Up control Register” bit 5 and bit 0.
Updated Section 10.1.64, “CG—Clock Gating Register” bits 29:28.
Updated Section 10.1.69, “USBOCM2—Overcurrent MAP Register 2”.
Added Section 13.1.12, “CAPP—Capability List Pointer Register (LPC I/F—D31:Fo)
Updated Section 14.1.22, “IDE_TIM—IDE Timing Register (SATA–D31:F2)”.
Added Section 14.1.23, “SIDETIM—Slave IDE Timing Register”, Section 14.1.24,
“SDMA_CNT—Synchronous DMA Control Register”, Section 14.1.25,
“SDMA_TIM—Synchronous DMA Timing Register”, and Section 14.1.26,
“IDE_CONFIG—IDE I/O COnfiguration Register”.
Updated Section 14.1.37, “SCLKGC—SATA Clock General Configuration Register”.
Updated Section 14.3.2.3, “PxSERR—Serial ATA Error Register (B31:F2)” bit 23.
Updated Section 14.4.1.10, “RSTF—RST Feature Capabilities Register” bit 7.
Updated Section 14.4.1.12, “Intel® RST Feature Capabilities”.
Updated Section 14.4.2.5, “PxIS—Port [5:0] Interrupt Status Register (D31:F2)” and
Section 14.4.2.6, “PxIE—Port [5:0] Interrupt Enable Register 9D31:F2)”
Updated Section 15.1.21, “IDE_TIM—IDE Timing Register (SATA–D31:F5)”
Added Section 15.1.22, “SDMA_CNT—Synchronous DMA Control Register”, Section
15.1.23, “SDMB_TIM—Synchronous DMA Timing Register”, and Section 15.1.24,
“IDE_CONFIG—IDE I/O COnfiguration Register”.
Added note to Section 16.1, “USB EHCI Configuration Registers (USB EHCI—D29:F0,
D26:F0)”.
Updated Section 16.1.20, “PWR_CNTL_STS—Power Managment Control/Status
Register” bits 1:0.
Updated Section 16.1.31, “EHCIR1—EHCI Initialization Register 1”
Added Section 16.1.32, “EHCIIR2—EHCI Initialization Register 2, Section 16.1.38,
“EHCIIR3—EHCI Initialization Register 3”, and Section 16.1.39, “EHCIIR4—EHCI
Initialization Register 4”.
Added Section 17.1.20, “HDINIT1—Intel High Definition Audio Initialization Register
1”.
Updated Section 17.2.15, “SSYNC—Stream Synchronization Register”.
Added note to Section 19.1, “PCI Express Configuration Registers (PCI
Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7)”.
Updated Section 21.1.2, “HSFS—Hardware Sequencing Flash Status Register” bit 13
and Section 21.4.2, “HSFS—Hardware Sequencing Flash Status Register” bit 13
Updated Section 22.1.3, “CMD—Command” bit 2.
Updated Section 22.2.5, “TSTTP—Thermal Sensor Temperature Trip Point Register” bits
23:16.
Updated Section 22.2.12, “PTA—PCH Temperature Adjust.
January 2012
Revision
Number Description Revision Date
40 Datasheet
Platform Controller Hub (PCH)
Features
Direct Media Interface
10 Gb/s each direction, full duplex
Transparent to software
PCI Express*
NEW: 8 PCI Express root ports
NEW: PCI Express 2.0 specification running at
2.5 GT/s.
NEW: Ports 1–4 or Ports 5–8 can independently
be configured to support four x1s, two x2s, one
x2 and 2 x1s, or one x4 port widths.
Support for full 2.5 Gb/s bandwidth in each
direction per x1 lane
Module based Hot-Plug supported (such as,
ExpressCard*)
PCI Bus Interface
Supports PCI Rev 2.3 Specification at 33 MHz
Four available PCI REQ/GNT pairs
Support for 64-bit addressing on PCI using DAC
protocol
Integrated Serial ATA Host Controller
Up to six SATA ports
Data transfer rates up to 3.0 Gb/s
(300 MB/s).
Integrated AHCI controller
External SATA support
NEW: Port Disable Capability
Intel® Rapid Storage Technology
Configures the PCH SATA controller as a RAID
controller supporting RAID 0/1/5/10
Intel® High Definition Audio Interface
PCI Express endpoint
Independent Bus Master logic for eight general
purpose streams: four input and four output
Support four external Codecs
Supports variable length stream slots
Supports multichannel, 32-bit sample depth,
192 kHz sample rate output
Provides mic array support
Allows for non-48 kHz sampling output
Support for ACPI Device States
—Low Voltage Mode
Intel® Quiet System Technology
Four TACH signals and Four PWM signals
Simple Serial Transport (SST) 1.0 Bus and Platform
Environmental Control Interface (PECI)
USB 2.0
Two EHCI Host Controllers, supporting up to
fourteen external ports
—Per-Port-Disable Capability
Includes up to two USB 2.0 High-speed Debug
Ports
Supports wake-up from sleeping states S1–S4
Supports legacy Keyboard/Mouse software
Integrated Gigabit LAN Controller
NEW: PCI Express* connection
Integrated ASF Management Controller
Network security with System Defense
Supports IEEE 802.3
10/100/1000 Mbps Ethernet Support
Jumbo Frame Support
Intel® Active Management Technology with System
Defense
NEW: Network Outbreak Containment Heuristics
Intel® I/O Virtualization (VT-d) Support
Intel® Trusted Execution Technology Support
Power Management Logic
Supports ACPI 4.0a
ACPI-defined power states (system level S0, S1,
S3, S4, and S5 states, various internal device
levels of Dx states, and processor driven C
states)
ACPI Power Management Timer
—SMI# generation
All registers readable/restorable for proper
resume from 0 V suspend states
Support for A-based legacy power management
for non-ACPI implementations
External Glue Integration
Integrated Pull-up, Pull-down and Series
Termination resistors on processor interface
Integrated Pull-down and Series resistors on USB
Enhanced DMA Controller
Two cascaded 8237 DMA controllers
Supports LPC DMA
Datasheet 41
Note: Not all features are available on all PCH SKUs. See Section 1.3 for more details.
§ §
SMBus
Faster speed, up to 100 kbps
Flexible SMBus/SMLink architecture to optimize
for ASF
Provides independent manageability bus through
SMLink interface
Supports SMBus 2.0 Specification
Host interface allows processor to communicate
using SMBus
Slave interface allows an internal or external
Microcontroller to access system resources
Compatible with most two-wire components that
are also I2C compatible
High Precision Event Timers
Advanced operating system interrupt scheduling
Timers Based on 8254
System timer, Refresh request, Speaker tone
output
Real-Time Clock
256-byte battery-backed CMOS RAM
Integrated oscillator components
Lower Power DC/DC Converter implementation
System TCO Reduction Circuits
Timers to generate SMI# and Reset upon
detection of system hang
Timers to detect improper processor reset
Integrated processor frequency strap logic
Supports ability to disable external devices
Serial Peripheral Interface (SPI)
Supports up to two SPI devices
Supports 20 MHz, 33 MHz, and 50 MHz SPI
devices
Support up to two different erase granularities
Interrupt Controller
Supports up to eight PCI interrupt pins
Supports PCI 2.3 Message Signaled Interrupts
Two cascaded 8259 with 15 interrupts
Integrated I/O APIC capability with 24 interrupts
Supports Processor System Bus interrupt
delivery
1.05 V operation with 1.5 V and 3.3 V I/O
5 V tolerant buffers on PCI, USB and selected
Legacy signals
1.05 V Core Voltage
Five Integrated Voltage Regulators for different
power rails
Firmware Hub Interface supports BIOS Memory size
up to 8 MB
Low Pin Count (LPC) I/F
Supports two Master/DMA devices.
Support for Security Device (Trusted Platform
Module) connected to LPC.
GPIO
TTL, Open-Drain, Inversion
—GPIO lock down
Package
27 mm x 27 mm FCBGA (Desktop Only)
27 mm x 25 mm FCBGA (Mobile Only)
22 mm x 20 mm FCBGA (Mobile SFF Only)
Analog Display Port
Digital Display
Three Digital Display ports capable of supporting
HDMI/DVI and Display port
One Digital Display port supporting SDVO
—LDVS (Mobile Only)
Intel® Anti-Theft Technology
JTAG
Boundary Scan for testing during board
manufacturing
42 Datasheet
Datasheet 43
Introduction
1 Introduction
1.1 About This Manual
This document is intended for Original Equipment Manufacturers and BIOS vendors
creating Intel® 5 Series Chipset and Intel® 3400 Series Chipset based products. This
document is for the following components:
•Intel
® 5 Series Chipset
—Intel
® P55 Express Chipset
—Intel
® H55 Express Chipset
—Intel
® H57 Express Chipset
—Intel
® Q57 Express Chipset
—Intel
® B55 Express Chipset
—Intel
® PM55 Express Chipset
—Intel
® QM57 Express Chipset
—Intel
® HM55 Express Chipset
—Intel
® HM57 Express Chipset
—Intel
® QS57 Express Chipset
•Intel
® 3400 Series Chipset
—Intel
® 3400 Chipset
—Intel
® 3420 Chipset
—Intel
® 3450 Chipset
Section 1.3 provides high-level feature differences for the Intel® 5 Series Chipset and
Intel® 3400 Series Chipset.
Note: Throughout this document, PCH is used as a general term and refers to the Intel® 5
Series Chipset and Intel® 3400 Series Chipset, unless specifically noted otherwise.
Note: Throughout this document, the term “Desktop” refers to information that is for the
Intel® P55 Express Chipset, Intel® H55 Express Chipset, Intel® H57 Express Chipset,
Intel® Q57 Express Chipset, Intel® B55 Express Chipset, Intel® 3400 Chipset, Intel®
3420 Chipset, Intel® 3450 Chipset, unless specifically noted otherwise.
Throughout this document, the term “Mobile Only” refers to information that is for the
Intel® PM55 Express Chipset, Intel® QM57 Express Chipset, Intel® HM55 Express
Chipset, Intel® HM57 Express Chipset, and the Intel® QS57 Express Chipset, unless
specifically noted otherwise.
This manual assumes a working knowledge of the vocabulary and principles of PCI
Express*, USB, AHCI, SATA, Intel® High Definition Audio (Intel® HD Audio), SMBus,
PCI, ACPI, and LPC. Although some details of these features are described within this
manual, see the individual industry specifications listed in Table 1-1 for the complete
details.
Introduction
44 Datasheet
Table 1-1. Industry Specifications
Specification Location
PCI Express* Base Specification, Revision 1.1 http://www.pcisig.com/specifications
PCI Express* Base Specification, Revision 2.0 http://www.pcisig.com/specifications
Low Pin Count Interface Specification, Revision 1.1
(LPC)
http://developer.intel.com/design/
chipsets/industry/lpc.htm
System Management Bus Specification, Version 2.0
(SMBus) http://www.smbus.org/specs/
PCI Local Bus Specification, Revision 2.3 (PCI) http://www.pcisig.com/specifications
PCI Power Management Specification, Revision 1.2 http://www.pcisig.com/specifications
SFF-8485 Specification for Serial GPIO (SGPIO) Bus,
Revision 0.7 ftp://ftp.seagate.com/sff/SFF-8485.PDF
Advanced Host Controller Interface specification for
Serial ATA, Revision 1.2
http://www.intel.com/technology/
serialata/ahci.htm
Intel® High Definition Audio Specification, Revision
1.0
http://www.intel.com/standards/
hdaudio/
Universal Serial Bus Specification (USB), Revision 2.0 http://www.usb.org/developers/docs
Advanced Configuration and Power Interface, Version
3.0b (ACPI) http://www.acpi.info/spec.htm
Enhanced Host Controller Interface Specification for
Universal Serial Bus, Revision 1.0 (EHCI)
http://developer.intel.com/technology/
usb/ehcispec.htm
Serial ATA Specification, Revision 2.5 http://www.serialata.org/
Serial ATA II: Extensions to Serial ATA 1.0, Revision
1.0 http://www.serialata.org/
Serial ATA II Cables and Connectors Volume 2 Gold http://www.serialata.org/
Alert Standard Format Specification, Version 1.03 http://www.dmtf.org/standards/asf
IEEE 802.3 Fast Ethernet http://standards.ieee.org/getieee802/
AT Attachment - 6 with Packet Interface (ATA/ATAPI -
6) http://T13.org (T13 1410D)
IA-PC HPET (High Precision Event Timers)
Specification, Revision 0.98a
http://www.intel.com/hardwaredesign/
hpetspec.htm
TPM Specification 1.02, Level 2 Revision 103 http://www.trustedcomputinggroup.org/
specs/TPM
Intel® Virtualization Technology
http://www.intel.com/technology/
platform-technology/virtualization/
index.htm
Datasheet 45
Introduction
Chapter 1. Introduction
Chapter 1 introduces the PCH and provides information on manual organization and
gives a general overview of the PCH.
Chapter 2. Signal Description
Chapter 2 provides a block diagram of the PCH and a detailed description of each
signal. Signals are arranged according to interface and details are provided as to the
drive characteristics (Input/Output, Open Drain, etc.) of all signals.
Chapter 3. PCH Pin States
Chapter 3 provides a complete list of signals, their associated power well, their logic
level in each power state, and their logic level before and after reset.
Chapter 4. PCH and System Clock Domains
Chapter 4 provides a list of each clock domain associated with the PCH in an Intel® 5
Series Chipset or Intel® 3400 Series Chipset based system.
Chapter 5. Functional Description
Chapter 5 provides a detailed description of the functions in the PCH. All PCI buses,
devices and functions in this manual are abbreviated using the following nomenclature;
Bus:Device:Function. This manual abbreviates buses as B0 and B1, devices as D22,
D25, D25, D26, D27, D28, D29, D30 and D31 and functions as F0, F1, F2, F3, F4, F5,
F6 and F7. For example Device 31 Function 0 is abbreviated as D31:F0, Bus 1 Device 8
Function 0 is abbreviated as B1:D8:F0. Generally, the bus number will not be used, and
can be considered to be Bus 0. Note that the PCH external PCI bus is typically Bus 1,
but may be assigned a different number depending upon system configuration.
Chapter 6. Ballout Definition
Chapter 6 provides a table of each signal and its ball assignment in the package.
Chapter 7. Package Information
Chapter 7 provides drawings of the physical dimensions and characteristics of the
package.
Chapter 8. Electrical Characteristics
Chapter 8 provides all AC and DC characteristics including detailed timing diagrams.
Chapter 9. Register and Memory Mappings
Chapter 9 provides an overview of the registers, fixed I/O ranges, variable I/O ranges
and memory ranges decoded by the PCH.
Chapter 10. Chipset Configuration Registers
Chapter 10 provides a detailed description of all registers and base functionality that is
related to chipset configuration and not a specific interface (such as LPC, PCI, or PCI
Express*). It contains the root complex register block, which describes the behavior of
the upstream internal link.
Chapter 11. PCI-to-PCI Bridge Registers
Chapter 11 provides a detailed description of all registers that reside in the PCI-to-PCI
bridge. This bridge resides at Device 30, Function 0 (D30:F0).
Chapter 12. Integrated LAN Controller Registers
Chapter 12 provides a detailed description of all registers that reside in the PCH’s
integrated LAN controller. The integrated LAN Controller resides at Device 25, Function
0 (D25:F0).
Chapter 13. LPC Bridge Registers
Chapter 13 provides a detailed description of all registers that reside in the LPC bridge.
This bridge resides at Device 31, Function 0 (D31:F0). This function contains registers
for many different units within the PCH including DMA, Timers, Interrupts, Processor
Interface, GPIO, Power Management, System Management and RTC.
Introduction
46 Datasheet
Chapter 14. SATA Controller Registers
Chapter 14 provides a detailed description of all registers that reside in the SATA
controller #1. This controller resides at Device 31, Function 2 (D31:F2).
Chapter 15. SATA Controller Registers
Chapter 15 provides a detailed description of all registers that reside in the SATA
controller #2. This controller resides at Device 31, Function 5 (D31:F5).
Chapter 16. EHCI Controller Registers
Chapter 16 provides a detailed description of all registers that reside in the two EHCI
host controllers. These controllers reside at Device 29, Function 0 (D29:F0) and Device
26, Function 0 (D26:F0).
Chapter 17. Intel® High Definition Audio Controller Registers
Chapter 17 provides a detailed description of all registers that reside in the Intel® High
Definition Audio controller. This controller resides at Device 27, Function 0 (D27:F0).
Chapter 18. SMBus Controller Registers
Chapter 18 provides a detailed description of all registers that reside in the SMBus
controller. This controller resides at Device 31, Function 3 (D31:F3).
Chapter 19. PCI Express* Port Controller Registers
Chapter 19 provides a detailed description of all registers that reside in the PCI Express
controller. This controller resides at Device 28, Functions 0 to 5 (D28:F0-F7).
Chapter 20. High Precision Event Timers Registers
Chapter 20 provides a detailed description of all registers that reside in the multimedia
timer memory mapped register space.
Chapter 21. Serial Peripheral Interface Registers
Chapter 21 provides a detailed description of all registers that reside in the SPI
memory mapped register space.
Chapter 22. Thermal Sensors
Chapter 22 provides a detailed description of all registers that reside in the thermal
sensors PCI configuration space. The registers reside at Device 31, Function 6
(D31:F6).
Chapter 23. Intel® Management Engine (Intel® ME)
Chapter 23 provides a detailed description of all registers that reside in the Intel ME
controller. The registers reside at Device 22, Function 0 (D22:F0).
Datasheet 47
Introduction
1.2 Overview
The PCH provides extensive I/O support. Functions and capabilities include:
PCI Express* Base Specification, Revision 2.0 support for up to eight ports
PCI Local Bus Specification, Revision 2.3 support for 33 MHz PCI operations
(supports up to four Req/Gnt pairs)
ACPI Power Management Logic Support, Revision 3.0b
Enhanced DMA controller, interrupt controller, and timer functions
Integrated Serial ATA host controllers with independent DMA operation on up to six
ports
USB host interface with support for up to fourteen USB ports; two EHCI high-speed
USB 2.0 Host controllers and 2 rate matching hubs
Integrated 10/100/1000 Gigabit Ethernet MAC with System Defense
System Management Bus (SMBus) Specification, Version 2.0 with additional
support for I2C devices
Supports Intel® High Definition Audio
Supports Intel® Rapid Storage Technology
Supports Intel® Active Management Technology
Supports Intel® Virtualization Technology for Directed I/O
Supports Intel® Trusted Execution Technology
Supports Intel® Flexible Display Interconnect (Intel® FDI)
Supports buffered mode generating extra clocks from a clock chip
Analog and Digital Display ports
—Analog CRT
—HDMI
—DVI
—DisplayPort 1.1
—SDVO
LVDS (Mobile Only)
Embedded DisplayPort
Low Pin Count (LPC) interface
Firmware Hub (FWH) interface support
Serial Peripheral Interface (SPI) support
•Intel
® Quiet System Technology (Desktop only)
•Intel
® Anti-Theft Technology
JTAG Boundary Scan support
The PCH incorporates a variety of PCI devices and functions, as shown in Table 1-2.
They are divided into eight logical devices. The first is the DMI-To-PCI bridge (Device
30). The second device (Device 31) contains most of the standard PCI functions that
always existed in the PCI-to-ISA bridges (South Bridges), such as the Intel® PIIX4. The
third and fourth (Device 29 and Device 26) are the USB host controller devices. The
fifth (Device 28) is the PCI Express device. The sixth (Device 27) is the HD Audio
controller device, and the seventh (Device 25) is the Gigabit Ethernet controller device.
The eighth (Device 22) is the Intel® Management Engine Interface Controller.
Introduction
48 Datasheet
NOTES:
1. The PCI-to-LPC bridge contains registers that control LPC, Power Management, System
Management, GPIO, Processor Interface, RTC, Interrupts, Timers, and DMA.
2. Device 26:Function 2 may be configured as Device 29:Function 3 during BIOS Post.
3. SATA Controller 2 is only visible when D31:F2 CC.SCC=01h.
Table 1-2. PCI Devices and Functions
Bus:Device:Function Function Description
Bus 0:Device 30:Function 0 DMI-to-PCI Bridge
Bus 0:Device 31:Function 0 LPC Controller1
Bus 0:Device 31:Function 2 SATA Controller #1
Bus 0:Device 31:Function 5 SATA Controller #23
Bus 0:Device 31:Function 6 Thermal Subsystem
Bus 0:Device 31:Function 3 SMBus Controller
Bus 0:Device 29:Function 0 USB HS EHCI Controller #1
Bus 0:Device 26:Fucntion 0 USB HS EHCI Controller #2
Bus 0:Device 28:Function 0 PCI Express* Port 1
Bus 0:Device 28:Function 1 PCI Express Port 2
Bus 0:Device 28:Function 2 PCI Express Port 3
Bus 0:Device 28:Function 3 PCI Express Port 4
Bus 0:Device 28:Function 4 PCI Express Port 5
Bus 0:Device 28:Function 5 PCI Express Port 6
Bus 0:Device 28:Function 6 PCI Express Port 7
Bus 0:Device 28:Function 7 PCI Express Port 8
Bus 0:Device 27:Function 0 Intel® High Definition Audio Controller
Bus 0:Device 25:Function 0 Gigabit Ethernet Controller
Bus 0:Device 22:Function 0 Intel® Management Engine Interface (Intel® MEI) #1
Bus 0:Device 22:Function 1 Intel® Management Engine Interface (Intel® MEI) #2
Bus 0:Device 22:Function 2 IDE-R
Bus 0:Device 22:Function 3 KT
Datasheet 49
Introduction
1.2.1 Capability Overview
The following sub-sections provide an overview of the PCH capabilities.
Direct Media Interface (DMI)
Direct Media Interface (DMI) is the chip-to-chip connection between the processor and
PCH. This high-speed interface integrates advanced priority-based servicing allowing
for concurrent traffic and true isochronous transfer capabilities. Base functionality is
completely software-transparent, permitting current and legacy software to operate
normally.
PCI Express* Interface
The PCH provides up to 8 PCI Express Root Ports, supporting the PCI Express Base
Specification, Revision 2.0. Each Root Port supports 2.5 Gb/s bandwidth in each
direction (5 Gb/s concurrent). PCI Express Root Ports 1-4 and Ports 5–8 can be
independently configured as four x1s, two x2s, one x2 and 2 x1s, or one x4 port
widths.
Serial ATA (SATA) Controller
The PCH has two integrated SATA host controllers that support independent DMA
operation on up to six ports and supports data transfer rates of up to 3.0 GB/s (300
MB/s). The SATA controller contains two modes of operation—a legacy mode using I/O
space, and an AHCI mode using memory space. Software that uses legacy mode will
not have AHCI capabilities.
The PCH supports the Serial ATA Specification, Revision 1.0a. The PCH also supports
several optional sections of the Serial ATA II: Extensions to Serial ATA 1.0
Specification, Revision 1.0 (AHCI support is required for some elements).
AHCI
The PCH provides hardware support for Advanced Host Controller Interface (AHCI), a
new programming interface for SATA host controllers. Platforms supporting AHCI may
take advantage of performance features such as no master/slave designation for SATA
devices—each device is treated as a master—and hardware-assisted native command
queuing. AHCI also provides usability enhancements such as Hot-Plug. AHCI requires
appropriate software support (such as an AHCI driver) and for some features, hardware
support in the SATA device or additional platform hardware. See Section 1.3 for details
on SKU feature availability.
Intel® Rapid Storage Technology
The PCH provides support for Intel® Rapid Storage Technology, providing both AHCI
(see above for details on AHCI) and integrated RAID functionality. The industry-leading
RAID capability provides high-performance RAID 0, 1, 5, and 10 functionality on up to
6 SATA ports of the PCH. Matrix RAID support is provided to allow multiple RAID levels
to be combined on a single set of hard drives, such as RAID 0 and RAID 1 on two disks.
Other RAID features include hot spare support, SMART alerting, and RAID 0 auto
replace. Software components include an Option ROM for pre-boot configuration and
boot functionality, a Microsoft Windows* compatible driver, and a user interface for
configuration and management of the RAID capability of the PCH. See Section 1.3 for
details on SKU feature availability.
Introduction
50 Datasheet
PCI Interface
The PCH PCI interface provides a 33 MHz, Revision 2.3 implementation. The PCH
integrates a PCI arbiter that supports up to four external PCI bus masters in addition to
the internal PCH requests. This allows for combinations of up to four PCI down devices
and PCI slots.
Low Pin Count (LPC) Interface
The PCH implements an LPC Interface as described in the LPC 1.1 Specification. The
Low Pin Count (LPC) bridge function of the PCH resides in PCI Device 31:Function 0. In
addition to the LPC bridge interface function, D31:F0 contains other functional units
including DMA, interrupt controllers, timers, power management, system management,
GPIO, and RTC.
Serial Peripheral Interface (SPI)
The PCH implements an SPI Interface as an alternative interface for the BIOS flash
device. An SPI flash device can be used as a replacement for the FWH, and is required
to support Gigabit Ethernet, Intel® Active Management Technology and integrated
Intel® Quiet System Technology. The PCH supports up to two SPI flash devices with
speeds of up to 50 MHz using two chip select pins.
Compatibility Modules (DMA Controller, Timer/Counters, Interrupt
Controller)
The DMA controller incorporates the logic of two 8237 DMA controllers, with seven
independently programmable channels. Channels 0–3 are hardwired to 8-bit, count-by-
byte transfers, and channels 5–7 are hardwired to 16-bit, count-by-word transfers. Any
two of the seven DMA channels can be programmed to support fast Type-F transfers.
Channel 4 is reserved as a generic bus master request.
The PCH supports LPC DMA, which is similar to ISA DMA, through the PCH’s DMA
controller. LPC DMA is handled through the use of the LDRQ# lines from peripherals
and special encoding on LAD[3:0] from the host. Single, Demand, Verify, and
Increment modes are supported on the LPC interface.
The timer/counter block contains three counters that are equivalent in function to those
found in one 8254 programmable interval timer. These three counters are combined to
provide the system timer function, and speaker tone. The 14.31818 MHz oscillator
input provides the clock source for these three counters.
The PCH provides an ISA-Compatible Programmable Interrupt Controller (PIC) that
incorporates the functionality of two 8259 interrupt controllers. The two interrupt
controllers are cascaded so that 14 external and two internal interrupts are possible. In
addition, the PCH supports a serial interrupt scheme.
All of the registers in these modules can be read and restored. This is required to save
and restore system state after power has been removed and restored to the platform.
Advanced Programmable Interrupt Controller (APIC)
In addition to the standard ISA compatible Programmable Interrupt controller (PIC)
described in the previous section, the PCH incorporates the Advanced Programmable
Interrupt Controller (APIC).
Datasheet 51
Introduction
Universal Serial Bus (USB) Controllers
The PCH contains up to two Enhanced Host Controller Interface (EHCI) host controllers
that support USB high-speed signaling. High-speed USB 2.0 allows data transfers up to
480 Mb/s. The PCH also contains two Rate Matching Hubs (RMH) that support USB full-
speed and low-speed signaling.
The PCH supports up to fourteen USB 2.0 ports. All fourteen ports are high-speed, full-
speed, and low-speed capable.
Gigabit Ethernet Controller
The Gigabit Ethernet Controller provides a system interface using a PCI function. The
controller provides a full memory-mapped or IO mapped interface along with a 64 bit
address master support for systems using more than 4 GB of physical memory and
DMA (Direct Memory Addressing) mechanisms for high performance data transfers. Its
bus master capabilities enable the component to process high-level commands and
perform multiple operations; this lowers processor utilization by off-loading
communication tasks from the processor. Two large configurable transmit and receive
FIFOs (up to 20 KB each) help prevent data underruns and overruns while waiting for
bus accesses. This enables the integrated LAN controller to transmit data with
minimum interframe spacing (IFS).
The LAN controller can operate at multiple speeds (10/100/1000 MB/s) and in either
full duplex or half duplex mode. In full duplex mode the LAN controller adheres with the
IEEE 802.3x Flow Control Specification. Half duplex performance is enhanced by a
proprietary collision reduction mechanism. See Section 5.3 for details.
RTC
The PCH contains a Motorola* MC146818B-compatible real-time clock with 256 bytes
of battery-backed RAM. The real-time clock performs two key functions: keeping track
of the time of day and storing system data, even when the system is powered down.
The RTC operates on a 32.768 KHz crystal and a 3 V battery.
The RTC also supports two lockable memory ranges. By setting bits in the configuration
space, two 8-byte ranges can be locked to read and write accesses. This prevents
unauthorized reading of passwords or other system security information.
The RTC also supports a date alarm that allows for scheduling a wake up event up to 30
days in advance, rather than just 24 hours in advance.
GPIO
Various general purpose inputs and outputs are provided for custom system design.
The number of inputs and outputs varies depending on the PCH’s configuration.
Enhanced Power Management
The PCH power management functions include enhanced clock control and various low-
power (suspend) states (such as, Suspend-to-RAM and Suspend-to-Disk). A hardware-
based thermal management circuit permits software-independent entrance to low-
power states. The the PCH contains full support for the Advanced Configuration and
Power Interface (ACPI) Specification, Revision 3.0a.
Introduction
52 Datasheet
Intel® Active Management Technology (Intel® AMT) (Not available on
all the Intel® 5 Series Chipset or Intel® 3400 Series Chipset SKUs)
Intel AMT is a fundamental component of Intel® vPro technology. Intel AMT is a set of
advanced manageability features developed as a direct result of IT customer feedback
gained through Intel market research. With the advent of powerful tools like the Intel®
System Defense Utility, the extensive feature set of Intel AMT easily integrates into any
network environment. See Section 1.3 for details on SKU feature availability.
Manageability
In addition to Intel® AMT, the PCH integrates several functions designed to manage the
system and lower the total cost of ownership (TCO) of the system. These system
management functions are designed to report errors, diagnose the system, and recover
from system lockups without the aid of an external microcontroller.
TCO Timer. The PCH’s integrated programmable TCO timer is used to detect
system locks. The first expiration of the timer generates an SMI# that the system
can use to recover from a software lock. The second expiration of the timer causes
a system reset to recover from a hardware lock.
Processor Present Indicator. The PCH looks for the processor to fetch the first
instruction after reset. If the processor does not fetch the first instruction, the PCH
will reboot the system.
ECC Error Reporting. When detecting an ECC error, the host controller has the
ability to send one of several messages to the PCH. The host controller can instruct
the PCH to generate either an SMI#, NMI, SERR#, or TCO interrupt.
Function Disable. The PCH provides the ability to disable the following integrated
functions: LAN, USB, LPC, Intel® HD Audio, SATA, PCI Express or SMBus. Once
disabled, these functions no longer decode I/O, memory, or PCI configuration
space. Also, no interrupts or power management events are generated from the
disabled functions.
Intruder Detect. The PCH provides an input signal (INTRUDER#) that can be
attached to a switch that is activated by the system case being opened. The PCH
can be programmed to generate an SMI# or TCO interrupt due to an active
INTRUDER# signal.
System Management Bus (SMBus 2.0)
The PCH contains an SMBus Host interface that allows the processor to communicate
with SMBus slaves. This interface is compatible with most I2C devices. Special I2C
commands are implemented.
The PCH’s SMBus host controller provides a mechanism for the processor to initiate
communications with SMBus peripherals (slaves). Also, the PCH supports slave
functionality, including the Host Notify protocol. Hence, the host controller supports
eight command protocols of the SMBus interface (see System Management Bus
(SMBus) Specification, Version 2.0): Quick Command, Send Byte, Receive Byte, Write
Byte/Word, Read Byte/Word, Process Call, Block Read/Write, and Host Notify.
The PCH SMBus also implements hardware-based Packet Error Checking for data
robustness and the Address Resolution Protocol (ARP) to dynamically provide address
to all SMBus devices.
Datasheet 53
Introduction
Intel® High Definition Audio Controller
The Intel® High Definition Audio Specification defines a digital interface that can be
used to attach different types of codecs, such as audio and modem codecs. The PCH’s
Intel® HD Audio controller supports up to 4 codecs. The link can operate at either 3.3 V
or 1.5 V.
With the support of multi-channel audio stream, 32-bit sample depth, and sample rate
up to 192 kHz, the Intel® HD Audio controller provides audio quality that can deliver CE
levels of audio experience. On the input side, the PCH adds support for an array of
microphones.
Intel® Quiet System Technology (Intel® QST)
The PCH integrates four fan speed sensors (four TACH signals) and four fan speed
controllers (three Pulse Width Modulator signals), which enables monitoring and
controlling up to four fans on the system. With the new implementation of the single-
wire Simple Serial Transport (SST) 1.0 bus and Platform Environmental Control
Interface (PECI), the PCH provides an easy way to connect to SST-based thermal
sensors and access the processor thermal data. In addition, coupled with the new
sophisticated fan speed control algorithms, Intel® QST provides effective thermal and
acoustic management for the platform.
Note: Intel® Quiet System Technology functionality requires a correctly configured system,
including an appropriate processor, Intel® Management Engine firmware, and system
BIOS support.
Intel® Anti-Theft Technology (Not available on all the Intel® 5 Series
Chipset or Intel® 3400 Series Chipset SKUs)
The PCH introduces a new hardware-based security technology which encrypts data
stored on any SATA compliant HDD in AHCI Mode. This feature gives the end-user the
ability to restrict access to HDD data by unknown parties. Intel® Anti-Theft Technology
can be used alone or can be combined with software encryption applications to add
protection against data theft.
Intel® Anti-Theft Technology functionality requires a correctly configured system,
including an appropriate processor, Intel® Management Engine firmware, and system
BIOS support.
Intel® Virtualization Technology for Directed I/O (Intel® VT-d)
The PCH provides hardware support for implementation of Intel® Virtualization
Technology with Directed I/O (Intel® VT-d). Intel® VT-d Technology consists of
technology components that support the virtualization of platforms based on Intel®
Architecture Processors. Intel® VT-d Technology enables multiple operating systems
and applications to run in independent partitions. A partition behaves like a virtual
machine (VM) and provides isolation and protection across partitions. Each partition is
allocated its own subset of host physical memory.
Introduction
54 Datasheet
JTAG Boundary-Scan
The PCH adds the industry standard JTAG interface and enables Boundary-Scan in
place of the XOR chains used in previous generations. Boundary-Scan can be used to
ensure device connectivity during the board manufacturing process. The JTAG interface
allows system manufacturers to improve efficiency by using industry available tools to
test the PCH on an assembled board. Since JTAG is a serial interface, it eliminates the
need to create probe points for every pin in an XOR chain. This eases pin breakout and
trace routing and simplifies the interface between the system and a bed-of-nails tester.
Note: Contact your local Intel Field Sales Representative for additional information about
JTAG usage on the PCH.
Serial Over Lan (SOL) Function
This function supports redirection of keyboard and text screens to a terminal window
on a remote console. The keyboard and text redirection enables the control of the client
machine through the network without the need to be physically near that machine. Text
and keyboard redirection allows the remote machine to control and configure a client
system. The SOL function emulates a standard PCI device and redirects the data from
the serial port to the management console using the integrated LAN.
KVM
KVM provides enhanced capabilities to its predecessor – SOL. In addition to the
features set provided by SOL, KVM provides mouse and graphic redirection across the
integrated LAN. Unlike SOL, KVM does not appear as a host accessible PCI device but is
instead almost completely performed by Intel AMT Firmware with minimal BIOS
interaction as described in the Intel ME BIOS Writer’s Guide. The KVM feature is only
available with internal graphics.
IDE-R Function
The IDE-R function is an IDE Redirection interface that provides client connection to
management console ATA/ATAPI devices such as hard disk drives and optical disk
drives. A remote machine can setup a diagnostic SW or OS installation image and direct
the client to boot an IDE-R session. The IDE-R interface is the same as the IDE
interface although the device is not physically connected to the system and supports
the ATA/ATAPI-6 specification. IDE-R does not conflict with any other type of boot and
can instead be implemented as a boot device option. The Intel AMT solution will use
IDE-R when remote boot is required. The device attached through IDE-R is only visible
to software during a management boot session. During normal boot session, the IDE-R
controller does not appear as a PCI present device.
PCH Display Interface
The PCH integrates latest display technologies such as HDMI*, DisplayPort*, Embedded
DisplayPort (eDP*), SDVO, and DVI along with legacy display technologies: Analog Port
(VGA) and LVDS (mobile only). The Analog Port and LVDS Port are dedicated ports on
the PCH and the Digital Ports B, C and D can be configured to drive HDMI, DVI, or
DisplayPort. Digital Port B can also be configured as SDVO while Digital Port D can be
configured as eDP. The HDMI interface supports the HDMI* 1.3C specification while the
DisplayPort interface supports the DisplayPort* 1.1a specification. The PCH supports
High-bandwidth Digital Content Protection for high definition content playback over
digital interfaces. The PCH also integrates audio codecs for audio support over HDMI
and DisplayPort interfaces.
The PCH receives the display data over the Intel® FDI and transcodes the data as per
the display technology protocol and sends the data through the display interface.
Datasheet 55
Introduction
Intel® Flexible Display Interconnect (FDI)
The Intel® FDI connects the display engine in the processor with the display interfaces
on the PCH. The display data from the frame buffer is processed by the display engine
and sent to the PCH where it is transcoded and driven out on the panel. Intel FDI
involves two channels – A and B for display data transfer.
Intel FDI Channel A has 4 lanes and Channel B supports 4 lanes depending on the
display configuration. Each of the Intel FDI Channel lanes uses differential signal
supporting 2.7 Gb/s. For two display configurations Intel FDI CH A maps to display pipe
A while Intel CH B maps to the second display pipe B.
1.3 Intel® 5 Series Chipset and Intel® 3400 Series
Chipset SKU Definition
NOTES:
1. Contact your local Intel Field Sales Representative for currently available PCH SKUs.
2. Table above shows feature difference between the PCH skus. If a feature is not listed in the
table it is considered a Base feature that is included in all SKUs.
3. The PCH provides hardware support for AHCI functionality when enabled by appropriate
system configurations and software drivers.
4. USB ports 6 and 7 are disabled.
5. PCIe* ports 7 and 8 are disabled.
Table 1-3. Intel® 5 Series Chipset Desktop SKUs
Feature Set
SKU Name(s)
Q57 H57 H55 P55 B55
PCI Express* 2.0 Ports 886
586
5
USB* 2.0 Ports 14 14 12414 124
SATA Ports 6666 6
HDMI/DVI/VGA/SDVO/DisplayPort/eDP Yes Yes Yes No Yes
LVDS No No No No No
Integrated Graphics Support with PAVP 1.5 Yes Yes Yes No Yes
Intel® Quiet System Technology Yes Yes Yes No Yes
Intel® Rapid
Storage
Tec hn olo gy
AHCI Yes Yes Yes Yes Yes
Raid 0/1/5/10 Support Yes Yes No Yes No
Intel® ME Ignition FW only No No No Yes No
Intel® AT Yes No No No No
Intel® AMT 6.0 Yes No No No No
Intel® Remote PC Assist Technology for
Business Yes No No No No
Intel® Remote PC Assist Technology for
Consumer No Yes Yes No No
Intel® Remote Wake Technology No Yes Yes No No
Introduction
56 Datasheet
NOTES:
1. Contact your local Intel Field Sales Representative for currently available PCH SKUs.
2. Table above shows feature difference between the PCH SKUs. If a feature is not listed in
the table it is considered a Base feature that is included in all skus.
3. The PCH provides hardware support for AHCI functionality when enabled by appropriate
system configurations and software drivers.
4. USB ports 6 and 7 are disabled.
5. PCIe* ports 7 and 8 are disabled.
6. SATA ports 2 and 3 are disabled.
Table 1-4. Intel® 5 Series Chipset Mobile SKUs
Feature Set
SKU Name(s)
QM57 HM57 PM55 HM55 QS57
PCI Express* 2.0 Ports 8886
58
USB* 2.0 Ports 14 14 14 12414
SATA Ports 6664
66
HDMI/DVI/VGA/SDVO/DisplayPort/eDP Yes Yes No Yes Yes
LVDS Yes Yes No Yes Yes
Graphics Support with PAVP 1.5 Yes Yes No Yes Yes
Intel® Quiet System Technology No No No No No
Intel® Rapid
Storage
Technology
AHCI Yes Yes Yes Yes Yes
Raid 0/1/5/10 Support Yes Yes Yes No Yes
Intel® ME Ignition FW only No No Yes No No
Intel® AT Yes Yes No Yes Yes
Intel® Active Managment Technology
(Intel AMT) 6.0 Yes No No No Yes
Intel® Remote PC Assist Technology for
Business Yes No No No Yes
Intel® Remote PC Assist Technology for
Consumer No Yes No No No
Intel® Remote Wake Technology No No No No No
Datasheet 57
Introduction
1. Contact your local Intel Field Sales Representative for currently available PCH skus.
2. Table above shows feature difference between the PCH skus. If a feature is not listed in the
table it is considered a Base feature that is included in all skus.
3. The PCH provides hardware support for AHCI functionality when enabled by appropriate
system configurations and software drivers.
4. USB ports 6 and 7 are disabled.
5. USB ports 8, 9, 10, 11, 12 and 13 are disabled.
6. SATA ports 2 and 3 are disabled.
7. PCIe* ports 7 and 8 are disabled.
1.4 Reference Documents
§ §
Table 1-5. Intel® 3400 Series Chipset Server SKUs
Feature Set
SKU Name(s)
Intel® 3400
Chipset
Intel®
3420
Chipset
Intel®
3450
Chipset
PCI Express* 2.0 Ports 6788
USB* 2.0 Ports 8512414
SATA Ports 4666
HDMI/DVI/VGA/SDVO/DisplayPort No No Yes
LVDS No No No
Graphics Support with PAVP 1.5 No No Yes
Intel® Quiet System Technology No No Yes
Intel® Rapid
Storage
Tec hn olo gy
AHCI No3Yes Yes
Raid 0/1/5/10 Support No Yes Yes
Intel® ME Ignition FW only Yes Yes No
Intel® AT No No Yes
Intel® AMT 6.0 No No Yes
Intel® Remote PC Assist Technology for Business No No Yes
Intel® Remote PC Assist Technology for Consumer No No No
Intel® Remote Wake Technology No No Yes
Document Document Number /
Location
Intel® 5 Series Chipset and Intel® 3400 Series Chipset
Specification Update
http://download.intel.com/
design/processor/
specupdt/322166.pdf
Intel® 5 Series Chipset and Intel® 3400 Series Chipset Thermal
Mechanical Specifications and Design Guidelines
www.intel.com/Assets/
PDF/designguide/
322171.pdf
Introduction
58 Datasheet
Datasheet 59
Signal Description
2 Signal Description
This chapter provides a detailed description of each signal. The signals are arranged in
functional groups according to their associated interface.
The “#” symbol at the end of the signal name indicates that the active, or asserted
state occurs when the signal is at a low voltage level. When “#” is not present, the
signal is asserted when at the high voltage level.
The “†” symbol at the end of the signal name indicates that the signal is mobile only.
The following notations are used to describe the signal type:
IInput Pin
OOutput Pin
OD O Open Drain Output Pin.
I/OD Bi-directional Input/Open Drain Output Pin.
I/O Bi-directional Input / Output Pin.
CMOS CMOS buffers. 1.5 V tolerant.
COD CMOS Open Drain buffers. 3.3 V tolerant.
HVCMOS High Voltage CMOS buffers. 3.3 V tolerant.
AAnalog reference or output.
The “Type” for each signal is indicative of the functional operating mode of the signal.
Unless otherwise noted in Section 3.2 or Section 3.3, a signal is considered to be in the
functional operating mode after RTCRST# de-asserts for signals in the RTC well, after
RSMRST# de-asserts for signals in the suspend well, after PWROK asserts for signals in
the core well, and after LAN_RST# de-asserts for signals in the LAN well.
Signal Description
60 Datasheet
Figure 2-1. PCH Interface Signals Block Diagram
TBD
THRMTRIP#
SYS_RESET#
RSMRST#
SLP_S3#
SLP_S4#
SLP_S5#/GPIO63
SLP_M#
CLKRUN#/GPIO32
PWROK
MEPWROK
PWRBTN#
RI#
WAKE#
SUS_STAT#/GPIO61
SUSCLK/GPIO62
LAN_RST#
BATLOW#/GPIO72
PLTRST#
STP_PCI#/GPIO34
ACPRESENT/GPIO31
DRAMPWROK
LAN_PHY_PWR_CTRL
SLP_LAN#/GPIO29
PMSYNCH
AD[31:0]
C/BE[3:0]#
DEVSEL#
FRAME#
IRDY#
TRDY#
STOP#
PAR
PERR#
REQ0#
REQ1#/GPIO50
REQ2#/GPIO52
REQ3#/GPIO54
GNT0#
GNT1#/GPIO51
GNT2#/GPIO53
GNT3#/GPIO55
SERR#
PME#
CLKIN_PCILOOPBACK
PCIRST#
PLOCK#
PCI
Interface
Power
Mgnt.
Interrupt
Interface
INIT3_3V#
RCIN#
A20GATE
PROCPWRGD
Processor
Interface
USB
SERIRQ
PIRQ[D:A]#
PIRQ[H:E]#/GPIO[5:2]
USB[13:0]P; USB[13:0]N
OC0#/GPIO59; OC1#/GPIO40
OC2#/GPIO41; OC3#/GPIO42
OC4#/GPIO43; OC5#/GPIO9
OC6#/GPIO10; OC7#/GPIO14
USBRBIAS
USBRBIAS#
RTCX1
RTCX2
CLKIN_BCLK_P;CLKIN_BCLK_N
CLKIN_DMI_P;CLKIN_DMI_N
CLKIN_SATA_[P:N]/CKSSCD_[P:N]
CLKIN_DOT96P;CLKIN_DOT96N
XTAL25_IN
REF14CLKIN
PCIECLKRQ0#/GPIO73;PCIECLKRQ1#/GPIO18
PCIECLKRQ2#/GPIO20;PCIECLKRQ3#/GPIO25
PCIECLKRQ4#/GPIO26;PCIECLKRQ5#/GPIO44
PCIECLKRQ6#/GPIO45;PCIECLKRQ7#/GPIO46
PEG_A_CLKRQ#/GPIO47;PEG_B_CLKRQ#/GPIO56
XCLK_RCOMP
RTC
Clock
Inputs
Misc.
Signals
INTVRMEN
SPKR
SRTCRST#
RTCRST#
General
Purpose
I/O
GPIO[72,57,35,32,28, 27,15,8,0]
PWM[3:0]/TP[12:9]
TACH0/GPIO17; TACH1/GPIO1
TACH2/GPIO6; TACH3/GPIO7
SST
PECI
INTRUDER#;
SML[0:1]DATA;SML[0:1]CLK;
SML0ALERT#/GPIO60
SML1ALERT#/GPIO74
DMI[3:0]TXP, DMI[3:0]TXN
DMI[3:0]RXP, DMI[3:0]RXN
DMI_ZCOMP
DMI_IRCOMP
Direct
Media
Interface
LPC / FWH
Interface
SMBus
Interface
HDA_RST#
HDA_SYNC
HDA_BCLK
HDA_SDO
HDA_SDIN[3:0]
HDA_DOCK_EN#;HDA_DOCK_RST#
Intel®
High
Definition
Audio
System
Mgnt.
LAD[3:0]/FWH[3:0]
LFRAME#/FWH4
LDRQ0#; LDRQ1#/GPIO23
SMBDATA; SMBCLK
SMBALERT#/GPIO11
SATA[5:0]TXP, SATA[5:0]TXN
SATA[5:0]RXP, SATA[5:0]RXN
SATAICOMPO
SATAICOMPI
SATALED#
SATA0GP/GPIO21
SATA1GP/GPIO19
SATA2GP/GPIO36
SATA3GP/GPIO37
SATA4GP/GPIO16
SATA5GP/GPIO49/TEMP_ALERT#
SCLOCK/GPIO22
SLOAD/GPIO38
SDATAOUT0/GPIO39
SDATAOUT1/GPIO48
Serial ATA
Interface
PCI Express*
Interface
PETp[8:1], PETn[8:1]
PERp[8:1], PERn[8:1]
SPI
SPI_CS0#; SPI_CS1#
SPI_MISO
SPI_MOSI
SPI_CLK
JTAG*
Fan Speed
Control DDPB_[3:0]P;DDPB_[3:0]N;
DDPC_[3:0]P;DDPC_[3:0]N;
DDPD_[3:0]P;DDPD_[3:0]N;
DDP[B:D]_AUXP;DDP[B:D]_AUXN;
DDP[B:D]_HPD
SDVO_CTRLCLK;SDVO_CTRLDATA
DDPC_CTRLCLK;DDPC_CTRLDATA
DDPD_CTRLCLK;DDPD_CTRLDATA
SDVO_INTP;SDVO_INTN
SDVO_TVCLKINP;SDVO_TVCLKINN
SDVO_STALLP;SDVO_STALLN
Digital
Display
Interface
Clock
Outputs
CLKOUT_DP_[P:N]/CLKOUT_BCLK1_[P:N]
CLKIN_DMI_P;CLKIN_DMI_N
XTAL25_OUT
CLKOUT_PEG_A_[P:N];CLKOUT_PEG_B_[P:N]
CLKOUT_PCIE[7:0]_P; CLKOUT_PCIE[7:0]_N
CLKOUT_PCI[4:0]
CLKOUTFLEX0/GPIO64;CLKOUTFLEX1/GPIO65
CLKOUTFLEX2/GPIO66;CLKOUTFLEX3/GPIO67
CRT_RED;CRT_GREEN;CRT_BLUE
DAC_IREF
CRT_HSYNC;CRT_VSYNC
CRT_DDC_CLK;CRT_DDC_DATA
CRT_IRTN
Analog
Display
LVDS
CLOCKOUT_BCLK0_[P:N]/CLKOUT_PCIE8_[P:N}
JTAGTCK
JTAGTMS
JTAGTDI
JTAGTDO
CL_CLK1
CL_DATA1
CL_RST1#
Controller
Link
LVDS[A:B]_DATA[3:0]
LVDS[A:B]_DATA#[3:0]
LVDS[A:B]_CLK:LVDS[A:B]_CLK#
LVD_VREFH;LVD_VREFL;LFV_VBG
LVD_IBG
L_DDC_CLK;L_DDC_DATA
L_VDDEN;L_BLKTEN;L_BKLTCTL
Datasheet 61
Signal Description
2.1 Direct Media Interface (DMI) to Host Controller
2.2 PCI Express*
Table 2-1. Direct Media Interface Signals
Name Type Description
DMI0TXP,
DMI0TXN ODirect Media Interface Differential Transmit Pair 0
DMI0RXP,
DMI0RXN IDirect Media Interface Differential Receive Pair 0
DMI1TXP,
DMI1TXN ODirect Media Interface Differential Transmit Pair 1
DMI1RXP,
DMI1RXN IDirect Media Interface Differential Receive Pair 1
DMI2TXP,
DMI2TXN ODirect Media Interface Differential Transmit Pair 2
DMI2RXP,
DMI2RXN IDirect Media Interface Differential Receive Pair 2
DMI3TXP,
DMI3TXN ODirect Media Interface Differential Transmit Pair 3
DMI3RXP,
DMI3RXN IDirect Media Interface Differential Receive Pair 3
DMI_ZCOMP IImpedance Compensation Input: Determines DMI input
impedance.
DMI_IRCOMP OImpedance/Current Compensation Output: Determines DMI
output impedance and bias current.
Table 2-2. PCI Express* Signals
Name Type Description
PETp1, PETn1 OPCI Express* Differential Transmit Pair 1
PERp1, PERn1 IPCI Express Differential Receive Pair 1
PETp2, PETn2 OPCI Express Differential Transmit Pair 2
PERp2, PERn2 IPCI Express Differential Receive Pair 2
PETp3, PETn3 OPCI Express Differential Transmit Pair 3
PERp3, PERn3 IPCI Express Differential Receive Pair 3
PETp4, PETn4 OPCI Express Differential Transmit Pair 4
PERp4, PERn4 IPCI Express Differential Receive Pair 4
PETp5, PETn5 OPCI Express Differential Transmit Pair 5
PERp5, PERn5 IPCI Express Differential Receive Pair 5
PETp6, PETn6 OPCI Express Differential Transmit Pair 6
PERp6, PERn6 IPCI Express Differential Receive Pair 6
PETp7, PETn7 O
PCI Express Differential Transmit Pair 7
NOTE: Port 7 may not be available in all PCH SKUs. Please see
Chapter 1.3 for more information.
Signal Description
62 Datasheet
2.3 Firmware Hub Interface
PERp7, PERn7 I
PCI Express Differential Receive Pair 7
NOTE: Port 7 may not be available in all PCH SKUs. Please see
Chapter 1.3 for more information.
PETp8, PETn8 O
PCI Express Differential Transmit Pair 8
NOTE: Port 8 may not be available in all PCH SKUs. Please see
Chapter 1.3 for more information.
PERp8, PERn8 I
PCI Express Differential Receive Pair 8
NOTE: Port 8 may not be available in all PCH SKUs. Please see
Chapter 1.3 for more information.
Table 2-3. Firmware Hub Interface Signals
Name Type Description
FWH[3:0] /
LAD[3:0] I/O Firmware Hub Signals. These signals are multiplexed with the LPC
address signals.
FWH4 /
LFRAME# OFirmware Hub Signals. This signal is multiplexed with the LPC
LFRAME# signal.
INIT3_3V# OInitialization 3.3 V: INIT3_3V# is asserted by the PCH for 16 PCI
clocks to reset the processor. This signal is intended for Firmware Hub.
Table 2-2. PCI Express* Signals
Name Type Description
Datasheet 63
Signal Description
2.4 PCI Interface
Table 2-4. PCI Interface Signals (Sheet 1 of 3)
Name Type Description
AD[31:0] I/O
PCI Address/Data: AD[31:0] is a multiplexed address and data
bus. During the first clock of a transaction, AD[31:0] contain a
physical address (32 bits). During subsequent clocks, AD[31:0]
contain data. The PCH will drive all 0s on AD[31:0] during the
address phase of all PCI Special Cycles.
C/BE[3:0]# I/O
Bus Command and Byte Enables: The command and byte enable
signals are multiplexed on the same PCI pins. During the address
phase of a transaction, C/BE[3:0]# define the bus command.
During the data phase C/BE[3:0]# define the Byte Enables.
All command encodings not shown are reserved. The PCH does not
decode reserved values, and therefore will not respond if a PCI
master generates a cycle using one of the reserved values.
DEVSEL# I/O
Device Select: The PCH asserts DEVSEL# to claim a PCI
transaction. As an output, the PCH asserts DEVSEL# when a PCI
master peripheral attempts an access to an internal PCH address or
an address destined for DMI (main memory or graphics). As an
input, DEVSEL# indicates the response to a PCH-initiated
transaction on the PCI bus. DEVSEL# is tri-stated from the leading
edge of PLTRST#. DEVSEL# remains tri-stated by the PCH until
driven by a target device.
FRAME# I/O
Cycle Frame: The current initiator drives FRAME# to indicate the
beginning and duration of a PCI transaction. While the initiator
asserts FRAME#, data transfers continue. When the initiator
negates FRAME#, the transaction is in the final data phase.
FRAME# is an input to the PCH when the PCH is the target, and
FRAME# is an output from the PCH when the PCH is the initiator.
FRAME# remains tri-stated by the PCH until driven by an initiator.
IRDY# I/O
Initiator Ready: IRDY# indicates the PCH ability, as an initiator, to
complete the current data phase of the transaction. It is used in
conjunction with TRDY#. A data phase is completed on any clock
both IRDY# and TRDY# are sampled asserted. During a write,
IRDY# indicates the PCH has valid data present on AD[31:0].
During a read, it indicates the PCH is prepared to latch data. IRDY#
is an input to the PCH when the PCH is the target and an output
from the PCH when the PCH is an initiator. IRDY# remains tri-stated
by the PCH until driven by an initiator.
C/BE[3:0]# Command Type
0000b Interrupt Acknowledge
0001b Special Cycle
0010b I/O Read
0011b I/O Write
0110b Memory Read
0111b Memory Write
1010b Configuration Read
1011b Configuration Write
1100b Memory Read Multiple
1110b Memory Read Line
1111b Memory Write and Invalidate
Signal Description
64 Datasheet
TRDY# I/O
Target Ready: TRDY# indicates the PCH ability, as a target, to
complete the current data phase of the transaction. TRDY# is used
in conjunction with IRDY#. A data phase is completed when both
TRDY# and IRDY# are sampled asserted. During a read, TRDY#
indicates that the PCH, as a target, has placed valid data on
AD[31:0]. During a write, TRDY# indicates the PCH, as a target is
prepared to latch data. TRDY# is an input to the PCH when the PCH
is the initiator and an output from the PCH when the PCH is a
target. TRDY# is tri-stated from the leading edge of PLTRST#.
TRDY# remains tri-stated by the PCH until driven by a target.
STOP# I/O
Stop: STOP# indicates that the PCH, as a target, is requesting the
initiator to stop the current transaction. STOP# causes the PCH, as
an initiator, to stop the current transaction. STOP# is an output
when the PCH is a target and an input when the PCH is an initiator.
PAR I/O
Calculated/Checked Parity: PAR uses “even” parity calculated on
36 bits, AD[31:0] plus C/BE[3:0]#. “Even” parity means that the
PCH counts the number of ones within the 36 bits plus PAR and the
sum is always even. The PCH always calculates PAR on 36 bits
regardless of the valid byte enables. The PCH generates PAR for
address and data phases and only ensures PAR to be valid one PCI
clock after the corresponding address or data phase. The PCH
drives and tri-states PAR identically to the AD[31:0] lines except
that the PCH delays PAR by exactly one PCI clock. PAR is an output
during the address phase (delayed one clock) for all PCH initiated
transactions. PAR is an output during the data phase (delayed one
clock) when the PCH is the initiator of a PCI write transaction, and
when it is the target of a read transaction. The PCH checks parity
when it is the target of a PCI write transaction. If a parity error is
detected, the PCH will set the appropriate internal status bits, and
has the option to generate an NMI# or SMI#.
PERR# I/O
Parity Error: An external PCI device drives PERR# when it receives
data that has a parity error. The PCH drives PERR# when it detects
a parity error. The PCH can either generate an NMI# or SMI# upon
detecting a parity error (either detected internally or reported using
the PERR# signal).
REQ0#
REQ1#/ GPIO50
REQ2#/ GPIO52
REQ3#/GPIO54
IPCI Requests: The PCH supports up to 4 masters on the PCI bus.
REQ[3:1]# pins can instead be used as GPIO.
GNT0#
GNT1#/ GPIO51
GNT2#/ GPIO53
GNT3#/GPIO55
O
PCI Grants: The PCH supports up to 4 masters on the PCI bus.
GNT[3:1]# pins can instead be used as GPIO.
Pull-up resistors are not required on these signals. If pull-ups are
used, they should be tied to the Vcc3_3 power rail.
NOTE: GNT[3:0]# are sampled as a functional strap. See
Section 2.28.1 for details.
CLKIN_PCILOO
PBACK I
PCI Clock: This is a 33 MHz clock feedback input to reduce skew
between PCH PCI clock and clock observed by connected PCI
devices. This signal must be connected to one of the pins in the
group CLKOUT_PCI[4:0]
Table 2-4. PCI Interface Signals (Sheet 2 of 3)
Name Type Description
Datasheet 65
Signal Description
2.5 Serial ATA Interface
PCIRST# O
PCI Reset: This is the Secondary PCI Bus reset signal. It is a
logical OR of the primary interface PLTRST# signal and the state of
the Secondary Bus Reset bit of the Bridge Control register
(D30:F0:3Eh, bit 6).
PLOCK# I/O
PCI Lock: This signal indicates an exclusive bus operation and may
require multiple transactions to complete. The PCH asserts PLOCK#
when it performs non-exclusive transactions on the PCI bus.
PLOCK# is ignored when PCI masters are granted the bus.
SERR# I/OD
System Error: SERR# can be pulsed active by any PCI device that
detects a system error condition. Upon sampling SERR# active, the
PCH has the ability to generate an NMI, SMI#, or interrupt.
PME# I/OD
PCI Power Management Event: PCI peripherals drive PME# to
wake the system from low-power states S1–S5. PME# assertion can
also be enabled to generate an SCI from the S0 state. In some
cases the PCH may drive PME# active due to an internal wake
event. The PCH will not drive PME# high, but it will be pulled up to
VccSus3_3 by an internal pull-up resistor.
Table 2-5. Serial ATA Interface Signals (Sheet 1 of 3)
Name Type Description
SATA0TXP
SATA0TXN O
Serial ATA 0 Differential Transmit Pairs: These are outbound
high-speed differential signals to Port 0.
In compatible mode, SATA Port 0 is the primary master of SATA
Controller 1.
SATA0RXP
SATA0RXN I
Serial ATA 0 Differential Receive Pair: These are inbound high-
speed differential signals from Port 0.
In compatible mode, SATA Port 0 is the primary master of SATA
Controller 1.
SATA1TXP
SATA1TXN O
Serial ATA 1 Differential Transmit Pair: These are outbound
high-speed differential signals to Port 1.
In compatible mode, SATA Port 1 is the secondary master of SATA
Controller 1.
SATA1RXP
SATA1RXN I
Serial ATA 1 Differential Receive Pair: These are inbound high-
speed differential signals from Port 1.
In compatible mode, SATA Port 1 is the secondary master of SATA
Controller 1.
—SATA2TXP
SATA2TXN
O
Serial ATA 2 Differential Transmit Pair: These are outbound
high-speed differential signals to Port 2.
In compatible mode, SATA Port 2 is the primary slave of SATA
Controller 1.
NOTE: SATA Port 2 may not be available in all PCH SKUs.
Table 2-4. PCI Interface Signals (Sheet 3 of 3)
Name Type Description
Signal Description
66 Datasheet
SATA2RXP
SATA2RXN I
Serial ATA 2 Differential Receive Pair: These are inbound high-
speed differential signals from Port 2.
In compatible mode, SATA Port 2 is the primary slave of SATA
Controller 1.
NOTE: SATA Port 2 may not be available in all PCH SKUs.
SATA3TXP
SATA3TXN O
Serial ATA 3 Differential Transmit Pair: These are outbound
high-speed differential signals to Port 3
In compatible mode, SATA Port 3 is the secondary slave of SATA
Controller 1.
NOTE: SATA Port 3 may not be available in all PCH SKUs.
SATA3RXP
SATA3RXN I
Serial ATA 3 Differential Receive Pair: These are inbound high-
speed differential signals from Port 3
In compatible mode, SATA Port 3 is the secondary slave of SATA
Controller 1.
NOTE: SATA Port 3 may not be available in all PCH SKUs.
SATA4TXP
SATA4TXN O
Serial ATA 4 Differential Transmit Pair: These are outbound
high-speed differential signals to Port 4.
In compatible mode, SATA Port 4 is the primary master of SATA
Controller 2.
SATA4RXP
SATA4RXN I
Serial ATA 4 Differential Receive Pair: These are inbound high-
speed differential signals from Port 4.
In compatible mode, SATA Port 4 is the primary master of SATA
Controller 2.
SATA5TXP
SATA5TXN O
Serial ATA 5 Differential Transmit Pair: These are outbound
high-speed differential signals to Port 5.
In compatible mode, SATA Port 5 is the secondary master of SATA
Controller 2.
SATA5RXP
SATA5RXN I
Serial ATA 5 Differential Receive Pair: These are inbound high-
speed differential signals from Port 5.
In compatible mode, SATA Port 5 is the secondary master of SATA
Controller 2.
SATAICOMPO O
Serial ATA Compensation Output: Connected to the external
precision resistor to VccCore. Must be connected to SATAICOMPI on
the board.
SATAICOMPI ISerial ATA Compensation Input: Connected to SATAICOMPO on
the board.
SATA0GP /
GPIO21 I
Serial ATA 0 General Purpose: This is an input pin which can be
configured as an interlock switch corresponding to SATA Port 0.
When used as an interlock switch status indication, this signal
should be driven to ‘0’ to indicate that the switch is closed and to ‘1’
to indicate that the switch is open.
This signal can instead be used as GPIO21.
SATA1GP /
GPIO19 I
Serial ATA 1 General Purpose: This is an input pin which can be
configured as an interlock switch corresponding to SATA Port 1.
When used as an interlock switch status indication, this signal
should be driven to ‘0’ to indicate that the switch is closed and to ‘1’
to indicate that the switch is open.
This signal can instead be used as GPIO19.
Table 2-5. Serial ATA Interface Signals (Sheet 2 of 3)
Name Type Description
Datasheet 67
Signal Description
SATA2GP /
GPIO36 I
Serial ATA 2 General Purpose: This is an input pin which can be
configured as an interlock switch corresponding to SATA Port 2.
When used as an interlock switch status indication, this signal
should be driven to ‘0’ to indicate that the switch is closed and to ‘1’
to indicate that the switch is open.
This signal can instead be used as GPIO36.
SATA3GP /
GPIO37 I
Serial ATA 3 General Purpose: This is an input pin which can be
configured as an interlock switch corresponding to SATA Port 3.
When used as an interlock switch status indication, this signal
should be driven to ‘0’ to indicate that the switch is closed and to ‘1’
to indicate that the switch is open.
This signal can instead be used as GPIO37.
SATA4GP /
GPIO16 I
Serial ATA 4 General Purpose: This is an input pin which can be
configured as an interlock switch corresponding to SATA Port 4.
When used as an interlock switch status indication, this signal
should be driven to ‘0’ to indicate that the switch is closed and to ‘1’
to indicate that the switch is open.
This signal can instead be used as GPIO16.
SATA5GP /
GPIO49 /
TEMP_ALERT#
I
Serial ATA 5 General Purpose: This is an input pin which can be
configured as an interlock switch corresponding to SATA Port 5.
When used as an interlock switch status indication, this signal
should be driven to ‘0’ to indicate that the switch is closed and to ‘1’
to indicate that the switch is open.
This signal can instead be used as GPIO49.
SATALED# OD O
Serial ATA LED: This signal is an open-drain output pin driven
during SATA command activity. It is to be connected to external
circuitry that can provide the current to drive a platform LED. When
active, the LED is on. When tri-stated, the LED is off. An external
pull-up resistor to Vcc3_3 is required.
SCLOCK/
GPIO22 OD O
SGPIO Reference Clock: The SATA controller uses rising edges of
this clock to transmit serial data, and the target uses the falling
edge of this clock to latch data. The SCLOCK frequency supported is
32 kHz.
This signal can instead be used as a GPIO22.
SLOAD/GPIO38 OD O
SGPIO Load: The controller drives a ‘1’ at the rising edge of
SCLOCK to indicate either the start or end of a bit stream. A 4-bit
vendor specific pattern will be transmitted right after the signal
assertion.
This signal can instead be used as a GPIO38.
SDATAOUT0/
GPIO39
SDATAOUT1/
GPIO48
OD O
SGPIO Dataout: Driven by the controller to indicate the drive
status in the following sequence: drive 0, 1, 2, 3, 4, 5, 0, 1, 2...
These signals can instead be used as GPIOs.
Table 2-5. Serial ATA Interface Signals (Sheet 3 of 3)
Name Type Description
Signal Description
68 Datasheet
2.6 LPC Interface
2.7 Interrupt Interface
NOTE: PIRQ Interrupts can only be shared if it is configured as level sensitive. They cannot be
shared if configured as edge triggered.
Table 2-6. LPC Interface Signals
Name Type Description
LAD[3:0] /
FWH[3:0] I/O LPC Multiplexed Command, Address, Data: For LAD[3:0], internal pull-
ups are provided.
LFRAME# /
FWH4 OLPC Frame: LFRAME# indicates the start of an LPC cycle, or an abort.
LDRQ0#,
LDRQ1# /
GPIO23
I
LPC Serial DMA/Master Request Inputs: LDRQ[1:0]# are used to
request DMA or bus master access. These signals are typically connected
to an external Super I/O device. An internal pull-up resistor is provided on
these signal.
This signal can instead be used as GPIO23.
Table 2-7. Interrupt Signals
Name Type Description
SERIRQ I/OD Serial Interrupt Request: This pin implements the serial interrupt
protocol.
PIRQ[D:A]# I/OD
PCI Interrupt Requests: In non-APIC mode the PIRQx# signals can
be routed to interrupts 3, 4, 5, 6, 7, 9, 10, 11, 12, 14 or 15 as
described in Section 5.8.6. Each PIRQx# line has a separate Route
Control register.
In APIC mode, these signals are connected to the internal I/O APIC in
the following fashion: PIRQA# is connected to IRQ16, PIRQB# to
IRQ17, PIRQC# to IRQ18, and PIRQD# to IRQ19. This frees the
legacy interrupts.
PIRQ[H:E]# /
GPIO[5:2] I/OD
PCI Interrupt Requests: In non-APIC mode the PIRQx# signals can
be routed to interrupts 3, 4, 5, 6, 7, 9, 10, 11, 12, 14 or 15 as
described in Section 5.8.6. Each PIRQx# line has a separate Route
Control register.
In APIC mode, these signals are connected to the internal I/O APIC in
the following fashion: PIRQE# is connected to IRQ20, PIRQF# to
IRQ21, PIRQG# to IRQ22, and PIRQH# to IRQ23. This frees the
legacy interrupts.
These signals can instead be used as GPIOs.
Datasheet 69
Signal Description
2.8 USB Interface
Table 2-8. USB Interface Signals (Sheet 1 of 2)
Name Type Description
USBP0P,
USBP0N I/O
Universal Serial Bus Port [1:0] Differential: These differential
pairs are used to transmit Data/Address/Command signals for port 0.
NOTE: No external resistors are required on these signals. The PCH
integrates 15 kΩ pull-downs and provides an output driver
impedance of 45 Ω which requires no external series resistor.
USBP1P,
USBP1N I/O
Universal Serial Bus Port [1:0] Differential: These differential
pairs are used to transmit Data/Address/Command signals for port 1.
NOTE: No external resistors are required on these signals. The PCH
integrates 15 kΩ pull-downs and provides an output driver
impedance of 45 Ω which requires no external series resistor.
USBP2P,
USBP2N I/O
Universal Serial Bus Port [3:2] Differential: These differential
pairs are used to transmit Data/Address/Command signals for port 2.
NOTE: No external resistors are required on these signals. The PCH
integrates 15 kΩ pull-downs and provides an output driver
impedance of 45 Ω which requires no external series resistor.
USBP3P,
USBP3N I/O
Universal Serial Bus Port [3:2] Differential: These differential
pairs are used to transmit Data/Address/Command signals for port 3.
NOTE: No external resistors are required on these signals. The PCH
integrates 15 kΩ pull-downs and provides an output driver
impedance of 45 Ω which requires no external series resistor.
USBP4P,
USBP4N I/O
Universal Serial Bus Port [5:4] Differential: These differential
pairs are used to transmit Data/Address/Command signals for port 4.
NOTE: No external resistors are required on these signals. The PCH
integrates 15 kΩ pull-downs and provides an output driver
impedance of 45 Ω which requires no external series resistor.
USBP5P,
USBP5N I/O
Universal Serial Bus Port [5:4] Differential: These differential
pairs are used to transmit Data/Address/Command signals for port 5.
NOTE: No external resistors are required on these signals. The PCH
integrates 15 kΩ pull-downs and provides an output driver
impedance of 45 Ω which requires no external series resistor.
USBP6P,
USBP6N I/O
Universal Serial Bus Port [7:6] Differential: These differential
pairs are used to transmit Data/Address/Command signals for port 6.
NOTE: No external resistors are required on these signals. The PCH
integrates 15 kΩ pull-downs and provides an output driver
impedance of 45 Ω which requires no external series resistor.
USBP7P,
USBP7N I/O
Universal Serial Bus Port [7:6] Differential: These differential
pairs are used to transmit Data/Address/Command signals for port 7.
NOTE: No external resistors are required on these signals. The PCH
integrates 15 kΩ pull-downs and provides an output driver
impedance of 45 Ω which requires no external series resistor.
Signal Description
70 Datasheet
USBP8P,
USBP8N I/O
Universal Serial Bus Port [9:8] Differential: These differential
pairs are used to transmit Data/Address/Command signals for port 8.
NOTE: No external resistors are required on these signals. The PCH
integrates 15 kΩ pull-downs and provides an output driver
impedance of 45 Ω which requires no external series resistor.
USBP9P,
USBP9N I/O
Universal Serial Bus Port [9:8] Differential: These differential
pairs are used to transmit Data/Address/Command signals for port 9.
NOTE: No external resistors are required on these signals. The PCH
integrates 15 kΩ pull-downs and provides an output driver
impedance of 45 Ω which requires no external series resistor.
USBP10P,
USBP10N I/O
Universal Serial Bus Port [11:10] Differential: These differential
pairs are used to transmit Data/Address/Command signals for port 10.
NOTE: No external resistors are required on these signals. The PCH
integrates 15 kΩ pull-downs and provides an output driver
impedance of 45 Ω which requires no external series resistor.
USBP11P,
USBP11N I/O
Universal Serial Bus Port [11:10] Differential: These differential
pairs are used to transmit Data/Address/Command signals for port 11.
NOTE: No external resistors are required on these signals. The PCH
integrates 15 kΩ pull-downs and provides an output driver
impedance of 45 Ω which requires no external series resistor.
USBP12P,
USBP12N I/O
Universal Serial Bus Port [13:12] Differential: These differential
pairs are used to transmit Data/Address/Command signals for port 12.
NOTE: No external resistors are required on these signals. The PCH
integrates 15 kΩ pull-downs and provides an output driver
impedance of 45 Ω which requires no external series resistor.
USBP13P,
USBP13N I/O
Universal Serial Bus Port [13:12] Differential: These differential
pairs are used to transmit Data/Address/Command signals for port 13.
NOTE: No external resistors are required on these signals. The PCH
integrates 15 kΩ pull-downs and provides an output driver
impedance of 45 Ω which requires no external series resistor.
OC0# / GPIO59
OC1# / GPIO40
OC2# / GPIO41
OC3# / GPIO42
OC4# / GPIO43
OC5# / GPIO9
OC6# / GPIO10
OC7# / GPIO14
I
Overcurrent Indicators: These signals set corresponding bits in the
USB controllers to indicate that an overcurrent condition has occurred.
These signals can instead be used as GPIOs.
NOTES:
1. OC# pins are not 5 V tolerant.
2. Depending on platform configuration, sharing of OC# pins may
be required.
3. OC#[3:0] can only be used for EHCI controller #1
4. OC#[4:7] can only be used for EHCI controller #2
USBRBIAS OUSB Resistor Bias: Analog connection point for an external resistor.
Used to set transmit currents and internal load resistors.
USBRBIAS# I
USB Resistor Bias Complement: Analog connection point for an
external resistor. Used to set transmit currents and internal load
resistors.
Table 2-8. USB Interface Signals (Sheet 2 of 2)
Name Type Description
Datasheet 71
Signal Description
2.9 Power Management Interface
Table 2-9. Power Management Interface Signals (Sheet 1 of 3)
Name Type Description
PLTRST# O
Platform Reset: The PCH asserts PLTRST# to reset devices on the
platform (such as, SIO, FWH, LAN, processor, etc.). The PCH asserts
PLTRST# during power-up and when software initiates a hard reset
sequence through the Reset Control register (I/O Register CF9h). The
PCH drives PLTRST# inactive a minimum of 1 ms after both PWROK
and SYS_PWROK are driven high. The PCH drives PLTRST# active a
minimum of 1 ms when initiated through the Reset Control register
(I/O Register CF9h).
NOTE: PLTRST# is in the VccSus3_3 well.
THRMTRIP# I
Thermal Trip: When low, this signal indicates that a thermal trip from
the processor occurred, and the PCH will immediately transition to a
S5 state. The PCH will not wait for the processor stop grant cycle since
the processor has overheated.
SLP_S3# O
S3 Sleep Control: SLP_S3# is for power plane control. This signal
shuts off power to all non-critical systems when in S3 (Suspend To
RAM), S4 (Suspend to Disk), or S5 (Soft Off) states.
SLP_S4# O
S4 Sleep Control: SLP_S4# is for power plane control. This signal
shuts power to all non-critical systems when in the S4 (Suspend to
Disk) or S5 (Soft Off) state.
NOTE: This pin must be used to control the DRAM power to use the
PCH’s DRAM power-cycling feature. See Chapter 5.13.10.2 for
details
SLP_S5# /
GPIO63 O
S5 Sleep Control: SLP_S5# is for power plane control. This signal is
used to shut power off to all non-critical systems when in the S5 (Soft
Off) states.
This signal can instead be used as GPIO63
SLP_M# O
Manageability Sleep State Control: SLP_M# is for power plane
control. If no Management Engine firmware is present, SLP_M# will
have the same timings as SLP_S3#.
SLP_LAN# /
GPIO29 O
LAN Sub-System Sleep Control: When SLP_LAN# is deasserted it
indicates that the PHY device must be powered. When SLP_LAN# is
asserted, power can be shut off to the PHY device. SLP_LAN# will
always be deasserted in S0 and anytime SLP_A# is deasserted.
A SLP_LAN#/GPIO Select Soft-Strap can be used for systems NOT
using SLP_LAN# functionality to revert to GPIO29 usage. When soft-
strap is 0 (default), pin function will be SLP_LAN#. When soft-strap is
set to 1, the pin returns to its regular GPIO mode.
The pin behavior is summarized in Section 5.13.10.5.
PWROK I
Power OK: When asserted, PWROK is an indication to the PCH that all
of its core power rails are powered and stable. PWROK can be driven
asynchronously. When PWROK is negated, the PCH asserts PLTRST#.
NOTE: It is required that the power rails associated with PCI/PCIe
typically the 3.3 V, 5 V, and 12 V core well rails) have been
valid for 99 ms prior to PCH PWROK assertion to comply with
the 100 ms PCI 2.3/PCIe 2.0 specification on PLTRST# de-
assertion. PWROK must not glitch, even if RSMRST# is low.
Signal Description
72 Datasheet
MEPWROK IManagement Engine Power OK: When asserted, this signal
indicates that power to the ME subsystem is stable.
PWRBTN# I
Power Button: The Power Button will cause SMI# or SCI to indicate a
system request to go to a sleep state. If the system is already in a
sleep state, this signal will cause a wake event. If PWRBTN# is pressed
for more than 4 seconds, this will cause an unconditional transition
(power button override) to the S5 state. Override will occur even if the
system is in the S1–S4 states. This signal has an internal pull-up
resistor and has an internal 16 ms de-bounce on the input.
RI# IRing Indicate: This signal is an input from a modem. It can be
enabled as a wake event, and this is preserved across power failures.
SYS_RESET# I
System Reset: This pin forces an internal reset after being
debounced. The PCH will reset immediately if the SMBus is idle;
otherwise, it will wait up to 25 ms ± 2 ms for the SMBus to idle before
forcing a reset on the system.
RSMRST# I
Resume Well Reset: This signal is used for resetting the resume
power plane logic. This signal must be asserted for at least 10 ms after
the suspend power wells are valid. When de-asserted, this signal is an
indication that the suspend power wells are stable.
LAN_RST# I
LAN Reset: When asserted, the internal LAN controller is in reset.
This signal must remain asserted until at least 1 ms after the LAN
power well (VccLAN) and ME power well (VccME3_3) are valid. Also,
LAN_RST# must assert a minimum of 40 ns before the LAN power rails
become inactive. When de-asserted, this signal is an indication that
LAN power wells are stable.
NOTES:
1. If Intel LAN is enabled, LAN_RST# must be connected to the
same source as MEPWROK.
2. If Intel LAN is not used or disabled, LAN_RST# must be
grounded through an external pull-down resistor.
LAN_PHY_PW
R_CTRL /
GPIO12
O
LAN PHY Power Control: LAN_PHY_PWR_CTRL should be connected
to LAN_DISABLE_N on the Intel 82567 GbE PHY. The PCH will drive
LAN_PHY_PWR_CTRL low to put the PHY into a low power state when
functionality is not needed.
NOTES:
LAN_PHY_PWR_CTRL can only be driven low if SLP_LAN# is de-
asserted.
This signal can instead be used as GPIO12.
WAKE# IPCI Express* Wake Event: Sideband wake signal on PCI Express
asserted by components requesting wake up.
SUS_STAT# /
GPIO61 O
Suspend Status: This signal is asserted by the PCH to indicate that
the system will be entering a low power state soon. This can be
monitored by devices with memory that need to switch from normal
refresh to suspend refresh mode. It can also be used by other
peripherals as an indication that they should isolate their outputs that
may be going to powered-off planes.
This signal can instead be used as GPIO61.
SUSCLK /
GPIO62 O
Suspend Clock: This clock is an output of the RTC generator circuit to
use by other chips for refresh clock.
This signal can instead be used as GPIO62.
Table 2-9. Power Management Interface Signals (Sheet 2 of 3)
Name Type Description
Datasheet 73
Signal Description
DRAMPWROK O
DRAM Power OK: This signal should connect to the Processor’s
SM_DRAMPWROK pin. The PCH asserts this pin to indicate when DRAM
power is on.
NOTE:
1. This pin should have External pull-up to the an always on
Voltage level of 1.05 V / 1.1 V
PMSYNCH OPower Management Sync: Provides state information from the PCH
to the processor relevant to C-state transitions.
CLKRUN#
(Mobile Only) /
GPIO32
(Desktop Only)
I/O
PCI Clock Run: Mobile only signal used to support PCI CLKRUN
protocol. Connects to peripherals that need to request clock restart or
prevention of clock stopping.
Mobile: Can be configured as CLKRUN#
Desktop: GPIO mode only.
BATLOW#
(Mobile Only) /
GPIO72
(Desktop Only)
I
Battery Low: Mobile only signal is an input from the battery to
indicate that there is insufficient power to boot the system. Assertion
will prevent wake from S3–S5 state. This signal can also be enabled to
cause an SMI# when asserted.
Mobile: Can be configured as BATLOW#
Desktop: GPIO mode only.
NOTE: Desktop requires a weak external pull-up
SYS_PWROK I
System Power OK: This generic power good input to the PCH is
driven and used in a platform-specific manner. While PWROK always
indicates that the CORE well of the PCH is stable, SYS_PWROK is used
to inform the PCH that power is stable to some other system
component(s) and the system is ready to start the exit from reset. The
particular component(s) associated with SYS_PWROK can vary across
platform types supported by the same generation of the PCH.
Depending on the platform, the PCH may expect (and wait) for
SYS_PWROK at different stages of the boot flow before continuing.
STP_PCI# /
GPIO34 O
Stop PCI Clock: This signal is an output to the external clock
generator for it to turn off the PCI clock.
This signal can instead be used as GPIO34.
Table 2-9. Power Management Interface Signals (Sheet 3 of 3)
Name Type Description
Signal Description
74 Datasheet
2.10 Processor Interface
2.11 SMBus Interface
Table 2-10. Processor Interface Signals
Name Type Description
RCIN# I
Keyboard Controller Reset Processor: The keyboard controller
can generate INIT# to the processor. This saves the external OR gate
with the PCH’s other sources of INIT#. When the PCH detects the
assertion of this signal, INIT# is generated for
16 PCI clocks.
NOTE: The PCH will ignore RCIN# assertion during transitions to the
S1, S3, S4, and S5 states.
A20GATE I
A20 Gate: A20GATE is from the keyboard controller. The signal acts
as an alternative method to force the A20M# signal active. It saves
the external OR gate needed with various other chipsets.
PROCPWRGD O
Processor Power Good: This signal should be connected to the
processor’s VCCPWRGOOD_1 and VCCPWRGOOD_0 input to indicate
when the processor power is valid.
Table 2-11. SM Bus Interface Signals
Name Type Description
SMBDATA I/OD SMBus Data: External pull-up resistor is required.
SMBCLK I/OD SMBus Clock: External pull-up resistor is required.
SMBALERT# /
GPIO11 I
SMBus Alert: This signal is used to wake the system or generate
SMI#.
This signal can instead be used as GPIO11.
Datasheet 75
Signal Description
2.12 System Management Interface
2.13 Real Time Clock Interface
Table 2-12. System Management Interface Signals
Name Type Description
INTRUDER# I
Intruder Detect: This signal can be set to disable system if box
detected open. This signal’s status is readable, so it can be used like a
GPI if the Intruder Detection is not needed.
SML0DATA I/OD System Management Link 0 Data: SMBus link to external PHY.
External pull-up is required.
SML0CLK I/OD System Management Link 0 Clock: SMBus link to external PHY.
External pull-up is required.
SML0ALERT# /
GPIO60 / O OD
SMLink Alert 0: Output of the integrated LAN controller to external
PHY. External pull-up resistor is required.
This signal can instead be used as GPIO60.
SML1ALERT# /
GPIO74 O OD
SMLink Alert 1: Alert for the Intel ME SMBus controller to optional
Embedded Controller or BMC. External pull-up resistor is required.
This signal can instead be used as GPIO74.
SML1CLK /
GPIO58 I/OD
System Management Link 1 Clock: SMBus link to optional
Embedded Controller or BMC. External pull-up resistor is required.
This signal can instead be used as GPIO58.
SML1DATA /
GPIO75 I/OD
System Management Link 1 Data: SMBus link to optional
Embedded Controller or BMC. External pull-up resistor is required.
This signal can instead be used as GPIO75.
Table 2-13. Real Time Clock Interface
Name Type Description
RTCX1 Special
Crystal Input 1: This signal is connected to the 32.768 kHz crystal. If
no external crystal is used, then RTCX1 can be driven with the desired
clock rate.
RTCX2 Special Crystal Input 2: This signal is connected to the 32.768 kHz crystal. If
no external crystal is used, then RTCX2 should be left floating.
Signal Description
76 Datasheet
2.14 Miscellaneous Signals
Table 2-14. Miscellaneous Signals
Name Type Description
INTVRMEN I
Internal Voltage Regulator Enable: This signal enables the
internal 1.05 V regulators.
This signal must be always pulled-up to VccRTC.
SPKR O
Speaker: The SPKR signal is the output of counter 2 and is internally
“ANDed” with Port 61h bit 1 to provide Speaker Data Enable. This
signal drives an external speaker driver device, which in turn drives
the system speaker. Upon PLTRST#, its output state is 0.
NOTE: SPKR is sampled as a functional strap. See Section 2.28.1 for
more details. There is a weak integrated pull-down resistor on
SPKR pin.
RTCRST# I
RTC Reset: When asserted, this signal resets register bits in the RTC
well.
NOTES:
1. Unless CMOS is being cleared (only to be done in the G3
power state), the RTCRST# input must always be high when
all other RTC power planes are on.
2. In the case where the RTC battery is dead or missing on the
platform, the RTCRST# pin must rise before the RSMRST#
pin.
SRTCRST# I
Secondary RTC Reset: This signal resets the manageability register
bits in the RTC well when the RTC battery is removed.
NOTES:
1. The SRTCRST# input must always be high when all other RTC
power planes are on.
2. In the case where the RTC battery is dead or missing on the
platform, the SRTCRST# pin must rise before the RSMRST#
pin.
Datasheet 77
Signal Description
2.15 Intel® High Definition Audio Link
Table 2-15. Intel® High Definition Audio Link Signals
Name Type Description
HDA_RST# OIntel® High Definition Audio Reset: Master hardware reset to
external codec(s).
HDA_SYNC O
Intel® High Definition Audio Sync: 48 kHz fixed rate sample
sync to the codec(s). Also used to encode the stream number.
NOTE: This signal is sampled as a functional strap. See
Section 2.28.1 for more details. There is a weak
integrated pull-down resistor on this pin.
HDA_BCLK O
Intel® High Definition Audio Bit Clock Output: 24.000 MHz
serial data clock generated by the Intel® High Definition Audio
controller (the PCH). This signal has a weak internal pull-down
resistor.
HDA_SDO O
Intel® High Definition Audio Serial Data Out: Serial TDM
data output to the codec(s). This serial output is double-pumped
for a bit rate of 48 Mb/s for Intel® High Definition Audio.
NOTE: This signal is sampled as a functional strap. See
Section 2.28.1 for more details. There is a weak
integrated pull-down resistor on this pin.
HDA_SDIN[3:0] I
Intel® High Definition Audio Serial Data In [3:0]: Serial
TDM data inputs from the codecs. The serial input is single-
pumped for a bit rate of 24 Mb/s for Intel® High Definition Audio.
These signals have integrated pull-down resistors, which are
always enabled.
NOTE: During enumeration, the PCH will drive this signal. During
normal operation, the CODEC will drive it.
HDA_DOCK_EN#
(Mobile Only) /
GPIO33
O
High Definition Audio Dock Enable: This mobile signal
controls the external Intel® HD Audio docking isolation logic. This
is an active low signal. When de-asserted the external docking
switch is in isolate mode. When asserted the external docking
switch electrically connects the Intel® HD Audio dock signals to
the corresponding PCH signals.
Mobile: Can be configured as HDA_DOCK_EN#
Desktop: GPIO mode only.
NOTE: This signal is sampled as a functional strap. See
Section 2.28.1 for more details.
HDA_DOCK_RST#
/ GPIO13 O
Intel High Definition Audio Dock Reset: This signal is a
dedicated HDA_RST# signal for the codec(s) in the docking
station. Aside from operating independently from the normal
HDA_RST# signal, it otherwise works similarly to the HDA_RST#
signal.
This signal is shared with GPIO13. This signal defaults to GPIO13
mode after PLTRST#. BIOS is responsible for configuring GPIO13
to HDA_DOCK_RST# mode.
Signal Description
78 Datasheet
2.16 Controller Link
2.17 Serial Peripheral Interface (SPI)
Table 2-16. Controller Link Signals
Signal Name Type Description
CL_RST1# /
TP20
(Desktop Only)
O
Controller Link Reset 1: Controller Link reset that connects to a
Wireless LAN Device supporting Intel® Active Management
Tec hn olo gy.
CL_CLK1 / TP18
(Desktop Only) I/O
Controller Link Clock 1: Bi-directional clock that connects to a
Wireless LAN Device supporting Intel® Active Management
Tec hn olo gy.
CL_DATA1 /
TP19
(Desktop Only)
I/O
Controller Link Data 1: Bi-directional data that connects to a
Wireless LAN Device supporting Intel® Active Management
Tec hn olo gy.
Table 2-17. Serial Peripheral Interface (SPI) Signals
Name Type Description
SPI_CS0# OSPI Chip Select 0: Used as the SPI bus request signal.
SPI_CS1# OSPI Chip Select 1: Used as the SPI bus request signal.
SPI_MISO ISPI Master IN Slave OUT: Data input pin for the PCH.
SPI_MOSI O
SPI Master OUT Slave IN: Data output pin for the PCH.
NOTE: This signal is sampled as a functional strap. See
Section 2.28.1 for more details. There is a weak integrated
pull-down resistor on this pin.
SPI_CLK OSPI Clock: SPI clock signal, during idle the bus owner will drive the
clock signal low. 17.86 MHz and 31.25 MHz.
Datasheet 79
Signal Description
2.18 Intel® Quiet System Technology and Thermal
Reporting
Table 2-18. Intel® Quiet System Technology Signals
Signal Name Type Description
PWM[3:0]
(Desktop Only) /
TP[12:9]
(Mobile Only)
OD O
Fan Pulse Width Modulation Outputs: Pulse Width Modulated
duty cycle output signal that is used for Intel® Quiet System
Tech no lo gy.
When controlling a 3-wire fan, this signal controls a power
transistor that, in turn, controls power to the fan. When controlling
a 4-wire fan, this signal is connected to the “Control” signal on the
fan. The polarity of this signal is programmable. The output default
is low.
These signals are 5 V tolerant.
TACH0
(Desktop Only) /
GPIO17
TACH1
(Desktop Only) /
GPIO1
TACH2
(Desktop Only) /
GPIO6
TACH3
(Desktop Only) /
GPIO7
I
Fan Tachometer Inputs: Tachometer pulse input signal that is
used to measure fan speed. This signal is connected to the “Sense”
signal on the fan.
These signals can instead be used as a GPIOs.
SST I/O Simple Serial Transport: Single-wire, serial bus. Connect to SST
compliant devices such as SST thermal sensors or voltage sensors.
PECI I/O
Platform Environment Control Interface: Single-wire, serial
bus. Connect to corresponding pin of the processor for accessing
processor digital thermometer.
Signal Description
80 Datasheet
2.19 JTAG Signals
NOTE: JTAG Pin definitions are from IEEE Standard Test Access Port and Boundary-Scan
Architecture (IEEE Std. 1149.1-2001).
2.20 Clock Signals
Table 2-19. JTAG Signals
Name Type Description
JTAG_TCK ITest Clock Input (TCK): The test clock input provides the clock
for the JTAG test logic.
JTAG_TMS I
Test Mode Select (TMS): The signal is decoded by the Test
Access Port (TAP) controller to control test operations.
JTAG_TDI I
Test Data Input (TDI): Serial test instructions and data are
received by the test logic at TDI.
JTAG_TDO OD Test Data Output (TDO): TDO is the serial output for test
instructions and data from the test logic defined in this standard.
TRST# I
Test Reset (RST): RST is an active low asynchronous signal that
can reset the Test Access Port (TAP) controller.
NOTE: The RST signal is optional per the IEEE 1149.1
specification, and is not functional for Boundary Scan
Test in g.
Table 2-20. Clock Interface Signals (Sheet 1 of 3)
Name Type Description
CLKIN_BCLK_P,
CLKIN_BCLK_N I133 MHz differential reference clock from a clock chip in
Buffer-Through Mode.
CLKOUT_BCLK0_P /
CLKOUT_PCIE8_P,
CLKOUT_BCLK0_N /
CLKOUT_PCIE8_N
O
133 MHz Differential output to Processor or 100 MHz
PCIe* Gen 1.1 specification differential output to PCI
Express devices.
CLKOUT_DP_P /
CLKOUT_BCLK1_P,
CLKOUT_DP_N /
CLKOUT_BCLK1_N
O120 MHz Differential output for DisplayPort reference or
133 MHz Differential output to processor
CLKIN_DMI_P,
CLKIN_DMI_N I
100 MHz differential reference clock from a clock chip in
Buffer-Through Mode.
NOTE: This input clock is required to be PCIe 2.0 jitter
spec compliant from a clock chip, for PCIe 2.0
discrete Graphics platforms.
CLKOUT_DMI_P,
CLKOUT_DMI_N O100 MHz Gen2 specification jitter tolerant differential
output to processor.
CLKIN_SATA_P /
CKSSCD_P,
CLKIN_SATA_N /
CKSSCD_N
I
100 MHz differential reference clock from a clock chip,
provided separately from CLKIN_DMI, for use only as a
100 MHz source for SATA.
CLKIN_DOT96P,
CLKIN_DOT96N I 96 MHz differential reference clock from a clock chip.
Datasheet 81
Signal Description
XTAL25_IN IConnection for 25 MHz crystal to the PCH oscillator
circuit.
XTAL25_OUT OConnection for 25 MHz crystal to the PCH oscillator
circuit.
REFCLK14IN ISingle-ended 14.31818 MHz reference clock driven by a
clock chip.
CLKOUT_PEG_A_P,
CLKOUT_PEG_A_N O100 MHz Gen2 specification differential output to PCI-
Express Graphics device
CLKOUT_PEG_B_P,
CLKOUT_PEG_B_N O100 MHz Gen2 specification differential output to a
second PCI-Express Graphics device
PEG_A_CLKRQ# / GPIO47,
PEG_B_CLKRQ# / GPIO56 IClock Request Signals for PEG SLOTS
These signals can instead be used as GPIOs
CLKOUT_PCIE[7:0]P,
CLKOUT_PCIE[7:0]N O100 MHz PCIe* Gen1.1 specification differential output
to PCI Express* devices
PCIECLKRQ0# / GPIO73,
PCIECLKRQ1# / GPIO18,
PCIECLKRQ2# / GPIO20,
PCIECLKRQ3# / GPIO25,
PCIECLKRQ4# / GPIO26,
PCIECLKRQ5# / GPIO44,
PCIECLKRQ6# / GPIO45,
PCIECLKRQ7# / GPIO46
I
Clock Request Signals for PCI Express 100 MHz Clocks
These signals can instead be used as GPIOs
NOTE: External Pull-up Resistor required if used for
CLKREQ# functionality
CLKOUT_PCI[4:0] O
Single Ended 33.3 MHz outputs to PCI connectors/
devices. One of these signals must be connected to
CLKIN_PCILOOPBACK to function as a PCI clock
loopback. This allows skew control for variable lengths of
CLKOUT_PCI[4:0].
CLKOUTFLEX0 / GPIO64 O
Configurable as a GPIO or as an Intel® Management
Firmware programmable output clock, which can be
configured as one of the following:
•33 MHz
14.31818 MHz
DC Output logic ‘0’ (Default)
NOTE: Default clock setting requires no Intel ME FW
configuration.
CLKOUTFLEX1 / GPIO65 O
Configurable as a GPIO or as an Intel® Management
Firmware programmable output clock, which can be
configured as one of the following:
Non functional and unsupported clock output value
(Default)
•33 MHz
14.31818 MHz output to SIO
DC Output logic ‘0’
NOTE: Default clock setting requires no Intel ME FW
configuration.
Table 2-20. Clock Interface Signals (Sheet 2 of 3)
Name Type Description
Signal Description
82 Datasheet
2.21 LVDS Signals (Mobile only)
CLKOUTFLEX2 / GPIO66 O
Configurable as a GPIO or as an Intel® Management
Firmware programmable output clock which can be
configured as one of the following:
33 MHz
14.31818 MHz (Default)
DC Output logic ‘0’
NOTE: Default clock setting requires no Intel ME FW
configuration.
CLKOUTFLEX3 / GPIO67 O
Configurable as a GPIO or as an Intel® Management
Firmware programmable output clock which can be
configured as one of the following:
48 MHz (Default)
33 MHz
14.31818 MHz output to SIO
DC Output logic ‘0’
NOTE: Default clock setting requires no Intel ME FW
configuration.
XCLK_RCOMP I/O
Differential clock buffer Impedance Compensation:
Connected to an external precision resistor (90.9 ohms
± 1%) to VccIO.
Table 2-21. LVDS Interface Signals (Sheet 1 of 2)
Name Type Description
LVDSA_DATA[3:0] O LVDS Channel A differential data output – positive
LVDSA_DATA#[3:0] O LVDS Channel A differential data output – negative
LVDSA_CLK O LVDS Channel A differential clock output – positive
LVDSA_CLK# O LVDS Channel A differential clock output – negative
LVDSB_DATA[3:0] O LVDS Channel B differential data output – positive
LVDSB_DATA#[3:0] O LVDS Channel B differential data output – negative
LVDSB_CLK O LVDS Channel B differential clock output – positive
LVDSB_CLK# O LVDS Channel B differential clock output – negative
L_DDC_CLK I/O EDID support for flat panel display
L_DDC_DATA I/O EDID support for flat panel display
L_CTRL_CLK I/O Control signal (clock) for external SSC clock chip control –
optional
L_CTRL_DATA I/O Control signal (data) for external SSC clock chip control
optional
L_VDD_EN O
LVDS Panel Power Enable:
Panel power control enable control for LVDS.
This signal is also called VDD_DBL in the CPIS specification
and is used to control the VDC source to the panel logic.
Table 2-20. Clock Interface Signals (Sheet 3 of 3)
Name Type Description
Datasheet 83
Signal Description
2.22 Analog Display /CRT DAC Signals
L_BKLTEN O
LVDS Backlight Enable:
Panel backlight enable control for LVDS.
This signal is also called ENA_BL in the CPIS specification
and is used to gate power into the backlight circuitry.
L_BKLTCTL O
Panel Backlight Brightness Control:
Panel brightness control for LVDS.
This signal is also called VARY_BL in the CPIS specification
and is used as the PWM Clock input signal.
LVDS_VREFH O Test mode voltage reference.
LVDS_VREFL O Test mode voltage reference.
LVD_IBG I LVDS reference current.
LVD_VBG O Test mode voltage reference.
Table 2-22. Analog Display Interface Signals
Name Type Description
CRT_RED O
A
RED Analog Video Output: This signal is a CRT Analog video
output from the internal color palette DAC.
CRT_GREEN O
A
GREEN Analog Video Output: This signal is a CRT Analog
video output from the internal color palette DAC.
CRT_BLUE O
A
BLUE Analog Video Output: This signal is a CRT Analog video
output from the internal color palette DAC.
DAC_IREF I/O
A
Resistor Set: Set point resistor for the internal color palette
DAC. A 1 KOhm 1% resistor is required between DAC_IREF and
motherboard ground.
CRT_HSYNC O
HVCMOS
CRT Horizontal Synchronization: This signal is used as the
horizontal sync (polarity is programmable) or “sync interval”.
2.5 V output
CRT_VSYNC O
HVCMOS
CRT Vertical Synchronization: This signal is used as the
vertical sync (polarity is programmable). 2.5V output.
CRT_DDC_CLK I/O
COD Monitor Control Clock
CRT_DDC_DATA I/O
COD Monitor Control Data
CRT_IRTN I/O
COD Monitor Interrupt Return
Table 2-21. LVDS Interface Signals (Sheet 2 of 2)
Name Type Description
Signal Description
84 Datasheet
2.23 Intel® Flexible Display Interface (FDI)
2.24 Digital Display Signals
Table 2-23. Intel® Flexible Display Interface Signals
Signal Name Type Description
FDI_RXP[3:0] I Display Link 1 positive data in
FDI_RXN[3:0] I Display Link 1 negative data in
FDI_FSYNC[0] O Display link 1 Frame sync
FDI_LSYNC[0] O Display link 1 Line sync
FDI_RXP[7:4] I Display Link 2 positive data in
FDI_RXN[7:4] I Display Link 2 negative data in
FDI_FSYNC[1] O Display link 2 Frame sync
FDI_LSYNC[1] O Display link 2 Line sync
FDI_INT O Used for Display interrupts from the PCH to processor.
Table 2-24. Digital Display Interface Signals (Sheet 1 of 3)
Name Type Description
DDPB_[3:0]P O
Port B: Capable of SDVO / HDMI / DVI / DisplayPort
SDVO
DDPB_[0]P: red
DDPB_[1]P: green
DDPB_[2]P: blue
DDPB_[3]P: clock
HDMI / DVI Port B Data and Clock Lines
DDPB_[0]P: TMDSB_DATA2
DDPB_[1]P: TMDSB_DATA1
DDPB_[2]P: TMDSB_DATA0
DDPB_[3]P: TMDSB_CLK
DisplayPort Port B
DDPB_[0]P: Display Port Lane 0
DDPB_[1]P: Display Port Lane 1
DDPB_[2]P: Display Port Lane 2
DDPB_[3]P: Display Port Lane 3
Datasheet 85
Signal Description
DDPB_[3:0]N O
Port B: Capable of SDVO / HDMI / DVI / DisplayPort
SDVO
DDPB_[0]N: red complement
DDPB_[1]N: green complement
DDPB_[2]N: blue complement
DDPB_[3]N: clock complement
HDMI / DVI Port B Data and Clock Line Complements
DDPB_[0]N: TMDSB_DATA2B
DDPB_[1]N: TMDSB_DATA1B
DDPB_[2]N: TMDSB_DATA0B
DDPB_[3]N: TMDSB_CLKB
DisplayPort Port B
DDPB_[0]N: Display Port Lane 0 complement
DDPB_[1]N: Display Port Lane 1 complement
DDPB_[2]N: Display Port Lane 2 complement
DDPB_[3]N: Display Port Lane 3 complement
DDPB_AUXP I/O Port B: Display Port Aux
DDPB_AUXN I/O Port B: Display Port Aux Complement
DDPB_HPD IPort B: TMDSB_HPD Hot Plug Detect
SDVO_CRTLCLK I/O Port B: HDMI Control Clock. Shared with port B SDVO
SDVO_CTRLDATA I/O Port B: HDMI Control Data. Shared with port B SDVO
SDVO_INTP ISDVO_INTP: Serial Digital Video Input Interrupt
SDVO_INTN ISDVO_INTN: Serial Digital Video Input Interrupt Complement.
SDVO_TVCLKINP ISDVO_TVCLKINP: Serial Digital Video TVOUT Synchronization
Clock.
SDVO_TVCLKINN ISDVO_TVCLKINN: Serial Digital Video TVOUT Synchronization
Clock Complement.
SDVO_STALLP ISDVO_STALLP: Serial Digital Video Field Stall.
SDVO_STALLN ISDVO_STALLN: Serial Digital Video Field Stall Complement.
DDPC_[3:0]P O
Port C: Capable of HDMI / DVI / DP
HDMI / DVI Port C Data and Clock Lines
DDPC_[0]P: TMDSC_DATA2
DDPC_[1]P: TMDSC_DATA1
DDPC_[2]P: TMDSC_DATA0
DDPC_[3]P: TMDSC_CLK
DisplayPort Port C
DDPC_[0]P: Display Port Lane 0
DDPC_[1]P: Display Port Lane 1
DDPC_[2]P: Display Port Lane 2
DDPC_[3]P: Display Port Lane 3
Table 2-24. Digital Display Interface Signals (Sheet 2 of 3)
Name Type Description
Signal Description
86 Datasheet
DDPC_[3:0]N O
Port C: Capable of HDMI / DVI / DisplayPort
HDMI / DVI Port C Data and Clock Line Complements
DDPC_[0]N: TMDSC_DATA2B
DDPC_[1]N: TMDSC_DATA1B
DDPC_[2]N: TMDSC_DATA0B
DDPC_[3]N: TMDSC_CLKB
DisplayPort Port C Complements
DDPC_[0]N: Lane 0 complement
DDPC_[1]N: Lane 1 complement
DDPC_[2]N: Lane 2 complement
DDPC_[3]N: Lane 3 complement
DDPC_AUXP I/O Port C: Display Port Aux
DDPC_AUXN I/O Port C: Display Port Aux Complement
DDPC_HPD IPort C: TMDSC_HPD Hot Plug Detect
DDPC_CTRLCLK I/O HDMI port C Control Clock
DDPC_CTRLDATA I/O HDMI port C Control Data
DDPD_[3:0]P O
Port D: Capable of HDMI / DVI / DP
HDMI / DVI Port D Data and Clock Lines
DDPD_[0]P: TMDSC_DATA2
DDPD_[1]P: TMDSC_DATA1
DDPD_[2]P: TMDSC_DATA0
DDPD_[3]P: TMDSC_CLK
DisplayPort Port D
DDPD_[0]P: Display Port Lane 0
DDPD_[1]P: Display Port Lane 1
DDPD_[2]P: Display Port Lane 2
DDPD_[3]P: Display Port Lane 3
DDPD_[3:0]N O
Port D: Capable of HDMI / DVI / DisplayPort
HDMI / DVI Port D Data and Clock Line Complements
DDPD_[0]N: TMDSC_DATA2B
DDPD_[1]N: TMDSC_DATA1B
DDPD_[2]N: TMDSC_DATA0B
DDPD_[3]N: TMDSC_CLKB
DisplayPort Port D Complements
DDPD_[0]N: Lane 0 complement
DDPD_[1]N: Lane 1 complement
DDPD_[2]N: Lane 2 complement
DDPD_[3]N: Lane 3 complement
DDPD_AUXP I/O Port D: Display Port Aux
DDPD_AUXN I/O Port D: Display Port Aux Complement
DDPD_HPD IPort D: TMDSD_HPD Hot Plug Detect
DDPD_CTRLCLK I/O HDMI port D Control Clock
DDPD_CTRLDATA I/O HDMI port D Control Data
Table 2-24. Digital Display Interface Signals (Sheet 3 of 3)
Name Type Description
Datasheet 87
Signal Description
2.25 General Purpose I/O Signals
NOTES:
1. GPIO Configuration registers within the Core Well are reset whenever PWROK is de-
asserted.
2. GPIO Configuration registers within the Suspend Well are reset when RSMRST# is
asserted, CF9h reset (06h or 0Eh) event occurs, or SYS_RST# is asserted.
3. GPIO24 is an exception to the other GPIO Signals in the Suspend Well and is not
reset by CF9h reset (06h or 0Eh).
Table 2-25. General Purpose I/O Signals (Sheet 1 of 3)
Name Type Tolerance Power
Well Default Blink
Capability Description
GPIO75 I/O 3.3 V Suspend Native No Multiplexed with SML1DATA. (Note 10)
GPIO74 I/O 3.3 V Suspend Native No Multiplexed with SML1ALERT#. (Note
10)
GPIO73 I/O 3.3 V Suspend Native No Multiplexed with PCIECLKRQ0#
GPIO72 I/O 3.3 V Suspend
Native
(Mobile
Only)
No Mobile: Multiplexed with BATLOW#.
Desktop: Unmultiplexed (Note 4)
GPIO67 I/O 3.3 V Core Native No Multiplexed with CLKOUTFLEX3
GPIO66 I/O 3.3 V Core Native No Multiplexed with CLKOUTFLEX2
GPIO65 I/O 3.3 V Core Native No Multiplexed with CLKOUTFLEX1
GPIO64 I/O 3.3 V Core Native No Multiplexed with CLKOUTFLEX0
GPIO63 I/O 3.3 V Suspend Native No Multiplexed with SLP_S5#
GPIO62 I/O 3.3 V Suspend Native No Multiplexed with SUSCLK
GPIO61 I/O 3.3 V Suspend Native No Multiplexed with SUS_STAT#
GPIO60 I/O 3.3 V Suspend Native No Multiplexed with SML0ALERT#
GPIO59 I/O 3.3 V Suspend Native No Multiplexed with OC[0]#. (Note 10)
GPIO58 I/O 3.3 V Suspend Native No Multiplexed with SML1CLK
GPIO57 I/O 3.3 V Suspend GPI No Unmultiplexed
GPIO56 I/O 3.3 V Suspend Native No Multiplexed with PEG_B_CLKRQ#
GPIO55 I/O 3.3 V Core Native No Multiplexed with GNT3#
GPIO54 I/O 5.0 V Core Native No Multiplexed with REQ3#. (Note 10)
GPIO53 I/O 3.3 V Core Native No Multiplexed with GNT2#
GPIO52 I/O 5.0 V Core Native No Multiplexed with REQ2#.(Note 10)
GPIO51 I/O 3.3 V Core Native No Multiplexed with GNT1#
GPIO50 I/O 5.0 V Core Native No Multiplexed with REQ1#.(Note 10)
GPIO49 I/O 3.3V Core GPI No Multiplexed with SATA5GP.
GPIO48 I/O 3.3 V Core GPI No Multiplexed with SDATAOUT1.
GPIO47 I/O 3.3V Suspend Native No Multiplexed with PEG_A_CLKRQ#
GPIO46 I/O 3.3V Suspend Native No Multiplexed with PCIECLKRQ7#
GPIO45 I/O 3.3V Suspend Native No Multiplexed with PCIECLKRQ6#
Signal Description
88 Datasheet
GPIO44 I/O 3.3V Suspend Native No Multiplexed with PCIECLKRQ5#
GPIO[43:40] I/O 3.3 V Suspend Native No Multiplexed with OC[4:1]#. (Note 10)
GPIO39 I/O 3.3 V Core GPI No Multiplexed with SDATAOUT0.
GPIO38 I/O 3.3 V Core GPI No Multiplexed with SLOAD.
GPIO37 I/O 3.3 V Core GPI No Multiplexed with SATA3GP.
GPIO36 I/O 3.3 V Core GPI No Multiplexed with SATA2GP.
GPIO35 I/O 3.3 V Core GPO No Unmultiplexed.
GPIO34 I/O 3.3 V Core GPI No Multiplexed with STP_PCI#
GPIO33 I/O 3.3 V Core GPO No Multiplexed with HDA_DOCK_EN#
(Mobile Only) (Note 4)
GPIO32 I/O 3.3 V Core
GPO,
Native
(Mobile
only)
No
Desktop Only: Unmultiplexed
Mobile Only: Used as CLKRUN#,
unavailable as GPIO. (Note 4)
GPIO31 I/O 3.3 V Suspend GPI Yes Multiplexed with ACPRESENT (Note 6)
GPIO30 I/O 3.3 V Suspend GPI Yes
Multiplexed with SUS_PWR_DN_ACK
Desktop: Cannot be used for native
function. Used as GPIO30 only.
Mobile: Used as SUS_PWR_DN_ACK or
GPIO30
GPIO29 I/O 3.3 V Suspend GPI No Multiplexed with SLP_LAN# (Note 9)
GPIO28 I/O 3.3 V Suspend GPI Yes Unmultiplexed
GPIO27 I/O 3.3 V Suspend GPO Yes Unmultiplexed
GPIO26 I/O 3.3 V Suspend Native Yes Multiplexed with PCIECLKRQ4#
GPIO25 I/O 3.3 V Suspend Native Yes Multiplexed with PCIECLKRQ3#
GPIO24 I/O 3.3 V Suspend GPO Yes
Unmultiplexed
NOTE: GPIO24 configuration register
bits are not cleared by CF9h
reset event.
GPIO23 I/O 3.3 V Core Native Yes Multiplexed with LDRQ1#.
GPIO22 I/O 3.3 V Core GPI Yes Multiplexed with SCLOCK
GPIO21 I/O 3.3 V Core GPI Yes Multiplexed with SATA0GP
GPIO20 I/O 3.3 V Core Native Yes Multiplexed with PCIECLKRQ2#
GPIO19 I/O 3.3 V Core GPI Yes Multiplexed with SATA1GP
GPIO18 I/O 3.3 V Core Native Yes (Note 7) Multiplexed with PCIECLKRQ1#
GPIO17 I/O 3.3 V Core GPI Yes Multiplexed with TACH0.
Mobile: Used as GPIO17 only.
GPIO16 I/O 3.3 V Core GPI Yes Multiplexed with SATA4GP.
GPIO15 I/O 3.3 V Suspend GPO Yes Unmultiplexed
GPIO14 I/O 3.3 V Suspend Native Yes Multiplexed with OC7#
Table 2-25. General Purpose I/O Signals (Sheet 2 of 3)
Name Type Tolerance Power
Well Default Blink
Capability Description
Datasheet 89
Signal Description
NOTES:
1. All GPIOs can be configured as either input or output.
2. GPI[15:0] can be configured to cause a SMI# or SCI. Note that a GPI can be routed to
either an SMI# or an SCI, but not both.
3. Some GPIOs exist in the VccSus3_3 power plane. Care must be taken to make sure GPIO
signals are not driven high into powered-down planes. Also, external devices should not be
driving powered down GPIOs high. Some GPIOs may be connected to pins on devices that
exist in the core well. If these GPIOs are outputs, there is a danger that a loss of core
power (PWROK low) or a Power Button Override event will result in the PCH driving a pin to
a logic 1 to another device that is powered down.
4. The functionality that is multiplexed with the GPIO may not be used in desktop
configuration.
5. When this signal is configured as GPO, the output stage is an open drain.
6. In a ME disabled system, GPIO31 may be used as ACPRESENT from the EC.
7. GPIO18 will toggle at a frequency of approximately 1 Hz when the signal is programmed as
a GPIO (when configured as an output) by BIOS.
8. This pins are used as Functional straps. See Section 2.28.1 for more detail.
9. For functional purposes of SLP_LAN# (the native functionality of the pin), this pin always
behaves as an output even if the GPIO defaults to an input. Therefore, this pin cannot be
used as a true GPIO29 by system designers. If Host BIOS does not control SLP_LAN#
control, SLP_LAN# behavior will be based on the setting of the RTC backed SLP_LAN#
Default Bit (D31:F0:A4h:Bit 8).
10. When the multiplexed GPIO is used as GPIO functionality, care should be taken to ensure
the signal is stable in its inactive state of the native functionality, immediately after reset
until it is initialized to GPIO functionality.
11. GPIO13 is powered by VccSusHDA (either 3.3 V or 1.5 V). Voltage tolerance on the signal
is the same as VccSusHDA.
GPIO13 I/O
3.3 V or
1.5 V
(Note 11)
HDA
Suspend GPI Yes Multiplexed with HDA_DOCK_RST#
(Mobile Only) (Note 4)
GPIO12 I/O 3.3 V Suspend Native Yes
Multiplexed with LAN_PHY_PWR_CTRL.
GPIO / Native functionality controlled
using soft strap.
GPIO11 I/O 3.3 V Suspend Native Yes Multiplexed with SMBALERT#. (Note 10)
GPIO10 I/O 3.3 V Suspend Native Yes Multiplexed with OC6#. (Note 10)
GPIO9 I/O 3.3 V Suspend Native Yes Multiplexed with OC5#. (Note 10)
GPIO8 I/O 3.3 V Suspend GPO Yes Unmultiplexed
GPIO[7:6] I/O 3.3 V Core GPI Yes Multiplexed with TACH[3:2].
Mobile: Used as GPIO[7:6] only.
GPIO[5:2] I/OD 5 V Core GPI Yes Multiplexed with PIRQ[H:E]# (Note 5).
GPIO1 I/O 3.3 V Core GPI Yes Multiplexed with TACH1.
Mobile: Used as GPIO1 only.
GPIO0 I/O 3.3 V Core GPI Yes Unmultiplexed
Table 2-25. General Purpose I/O Signals (Sheet 3 of 3)
Name Type Tolerance Power
Well Default Blink
Capability Description
Signal Description
90 Datasheet
2.26 Manageability Signals
The following signals can be optionally used by the PCH Management engine supported
applications and appropriately configured by Management Engine firmware. When
configured and used as a Manageability function, the associated host GPIO functionality
is no longer available. If the Manageability function is not used in a platform, the signal
can be used as a host General Purpose I/O or a native function.
NOTE: SLP_LAN#/GPIO29 may also be configured by ME FW in Sx/Moff. See SLP_LAN#/GPIO29 signal
description for details.
Table 2-26. Manageability Signals
Name Type Description
GPIO30/
PROC_MISSING
(Desktop Only)
IUsed to indicate Processor Missing to the PCH Management
Engine.
SATA5GP / GPIO49 /
TEMP_ALERT# O
Used as an alert (active low) to indicate to the external
controller (such as, EC or SIO) that temperatures are out of
range for the PCH or Graphics/Memory Controller or the
processor core.
ACPRESENT
(Mobile Only)/ GPIO31 I
Used in Mobile systems. Input signal from the Embedded
Controller to indicate AC power source or the system battery.
Active High indicates AC power.
NOTE: This Signal is required unless using Intel Management
Engine Ignition firmware.
SUS_PWR_DN_ACK
(Mobile Only)/ GPIO30 O
Active High output signal asserted by the Intel® ME to the
Embedded Controller, when it does not require the PCH
Suspend well to be powered.
NOTE: This signal is required by Management Engine in all
platforms.
Datasheet 91
Signal Description
2.27 Power and Ground Signals
Table 2-27. Power and Ground Signals (Sheet 1 of 2)
Name Description
DcpRTC Decoupling: This signal is for RTC decoupling only. This signal requires
decoupling.
DcpSST
Decoupling: Internally generated 1.5V powered off of Suspend Well. This
signal requires decoupling. Decoupling is required even if this feature is not
used.
DcpSus Decoupling: 1.05 V Suspend well supply that is supplied internally by
Internal VRs. This signal requires decoupling.
DcpSusByp Decoupling: 1.05 V Suspend well supply that is supplied internally by
Internal VRs. This signal requires decoupling.
V5REF Reference for 5 V tolerance on core well inputs. This power may be shut off in
S3, S4, S5 or G3 states.
V5REF_Sus Reference for 5 V tolerance on suspend well inputs. This power is not
expected to be shut off unless the system is unplugged.
VccCore 1.05 V supply for core well logic. This power may be shut off in S3, S4, S5 or
G3 states.
Vcc3_3 3.3 V supply for core well I/O buffers. This power may be shut off in S3, S4,
S5 or G3 states.
VccME 1.05 V supply for the Intel® Management Engine. This plane must be on in
S0 and other times the Intel® Management Engine is used.
VccME3_3
3.3 V supply for the Intel® Management Engine I/O and SPI I/O. This is a
separate power plane that may or may not be powered in S3–S5 states. This
plane must be on in S0 and other times the Intel® Management Engine is
used.
VccDMI
Power supply for DMI.
1.1 V or 1.05 V based on the processor used. See the respective processor
documentation to find the appropriate voltage level.
VccLAN
1.05 V supply for LAN controller logic. This is a separate power plane that
may or may not be powered in S3–S5 states.
NOTE: VccLAN may be grounded if Intel LAN is disabled.
VccRTC
3.3 V (can drop to 2.0 V min. in G3 state) supply for the RTC well. This power
is not expected to be shut off unless the RTC battery is removed or
completely drained.
NOTE: Implementations should not attempt to clear CMOS by using a jumper
to pull VccRTC low. Clearing CMOS in a PCH-based platform can be
done by using a jumper on RTCRST# or GPI.
VccIO 1.05 V supply for core well I/O buffers. This power may be shut off in S3, S4,
S5 or G3 states.
VccSus3_3 3.3 V supply for suspend well I/O buffers. This power is not expected to be
shut off unless the system is unplugged.
VccSusHDA Suspend supply for Intel® High Definition Audio. This pin can be either 1.5 or
3.3 V.
VccVRM 1.8 V supply for internal PLL and VRMs
VccpNAND This pin should be pulled up to 1.8V or 3.3V.
Signal Description
92 Datasheet
VccADPLLA 1.05 V supply for Display PLL A Analog Power. This power is supplied by the
core well.
VccADPLLB 1.05 V supply for Display PLL B Analog Power. This power is supplied by the
core well.
VccADAC 3.3 V supply for Display DAC Analog Power. This power is supplied by the core
well.
Vss Grounds.
VSS_NCTF Non-Critical To Function. These pins are for package mechanical reliability.
NOTE: These pins should be connected to Ground.
Vcc3_3_NCTF Non-Critical To Function. These pins are for package mechanical reliability.
NOTE: These pins should be connected the same as the Vcc3_3 pins.
VccRTC_NCTF Non-Critical To Function. These pins are for package mechanical reliability.
NOTE: These pins should be connected to DcpRTC or left as No Connect.
VccSUS3_3_N
CTF
Non-Critical To Function. These pins are for package mechanical reliability.
NOTE: These pins should be connected the same as the VccSUS3_3 pins.
V_CPU_IO_NC
TF
Non-Critical To Function. These pins are for package mechanical reliability.
NOTE: These pins should be connected the same as the V_CPU_IO pins.
TP22_NCTF Non-Critical To Function. These pins are for package mechanical reliability.
NOTE: These pins should be connected to Ground.
VccAClk
1.05 V Analog power supply for internal clock PLL. This requires a filter and
power is supplied by the core well.
NOTE: This pin can be left as no connect in On-Die VR enabled mode
(default).
VccSATAPLL
1.05 V Analog power supply for SATA. This signal is used for the analog
power for SATA. This requires an LC filter and is supplied by the core well.
Must be powered even if SATA is not used.
NOTE: This pin can be left as no connect in On-Die VR enabled mode
(default).
VccAPLLEXP
1.05 V Analog Power for DMI. This power is supplied by the core well. This
requires an LC filter.
NOTE: This pin can be left as no connect in On-Die VR enabled mode
(default).
VccFDIPLL
1.05 V analog power supply for the FDI PLL. This power is supplied with core
well. This requires an LC filter.
NOTE: This pin can be left as no connect in On-Die VR enabled mode
(default).
VccALVDS 3.3 V Analog power supply for LVDS (Mobile Only)
VccTX_LVDS 1.8 V I/O power supply for LVDS. (Mobile Only) This power is supplied by
core well.
V_CPU_IO
Powered by the same supply as the processor I/O voltage. This supply is used
to drive the processor interface signals. See the respective processor
documentation to find the appropriate voltage level.
Table 2-27. Power and Ground Signals (Sheet 2 of 2)
Name Description
Datasheet 93
Signal Description
2.28 Pin Straps
2.28.1 Functional Straps
The following signals are used for static configuration. They are sampled at the rising
edge of PWROK to select configurations (except as noted), and then revert later to their
normal usage. To invoke the associated mode, the signal should be driven at least four
PCI clocks prior to the time it is sampled.
The PCH has implemented Soft Straps. Soft Straps are used to configure specific
functions within the PCH and processor very early in the boot process before BIOS or
SW intervention. When Descriptor Mode is enabled, the PCH will read Soft Strap data
out of the SPI device prior to the de-assertion of reset to both the Management Engine
and the Host system. See Section 5.24.2 for information on Descriptor Mode.
Table 2-28. Functional Strap Definitions (Sheet 1 of 4)
Signal Usage When
Sampled Comment
SPKR No Reboot Rising edge of
PWROK
The signal has a weak internal pull-down.
NOTE: The internal pull-down is disabled after PLTRST# de-
asserts. If the signal is sampled high, this indicates
that the system is strapped to the “No Reboot”
mode (the PCH will disable the TCO Timer system
reboot feature). The status of this strap is readable
using the NO REBOOT bit (Chipset Config Registers:
Offset 3410h:bit 5).
INIT3_3V# Reserved Rising edge of
PWROK
This signal has a weak internal pull up. Note that the
internal pull-up is disabled after PLTRST# de-asserts.
NOTE: This signal should not be pulled low.
GNT[3]#/
GPIO[55]
Top -Bloc k
Swap Override
Rising edge of
PWROK
The signal has a weak internal pull-up. If the signal is
sampled low, this indicates that the system is strapped to
the “topblock swap” mode.
The status of this strap is readable using the Top Swap bit
(Chipset Config Registers:Offset 3414h:bit 0).
NOTES:
1. The internal pull-up is disabled after PLTRST#
deasserts.
2. Software will not be able to clear the Top-Swap bit
until the system is rebooted without GNT3#/GPIO55
being pulled down.
INTVRMEN
Integrated 1.05
V VRM Enable /
Disable
Always
Integrated 1.05 V VRMs is enabled when high
NOTE: This signal should always be pulled high
Signal Description
94 Datasheet
GNT1# /
GPIO51
Boot BIOS Strap
bit [1]
BBS[1]
Rising edge of
PWROK
This signal has a weak internal pull-up.
Note that the internal pull-up is disabled after PCIRST# de-
asserts.
This field determines the destination of accesses to the
BIOS memory range. Also, controllable using Boot BIOS
Destination bit (Chipset Config Registers:Offset 3410h:bit
11). This strap is used in conjunction with Boot BIOS
Destination Selection 0 strap.
NOTE: If option 00 LPC is selected, BIOS may still be
placed on LPC; however, all platforms with the PCH
require SPI flash connected directly to the PCH SPI
bus with a valid descriptor to boot.
NOTE: Booting to PCI is intended for debut/testing only.
Boot BIOS Destination Select to LPC/PCI by
functional strap or using Boot BIOS Destination Bit
will not affect SPI accesses initiated by Intel®
Management Engine or Integrated GbE LAN.
GNT[0]#
Boot BIOS Strap
bit[0]
BBS[0]
Rising edge of
PWROK
This Signal has a weak internal pull-up.
Note that the internal pull-up is disabled after PCIRST# de-
asserts.
This field determines the destination of accesses to the
BIOS memory range. Also, controllable using Boot BIOS
Destination bit (Chipset Config Registers:Offset 3410h:bit
10). This strap is used in conjunction with Boot BIOS
Destination Selection 1 strap.
NOTE: If option 00 LPC is selected, BIOS may still be
placed on LPC; however, all platforms with the PCH
require SPI flash connected directly to the PCH's SPI
bus with a valid descriptor to boot.
NOTE: Booting to PCI is intended for debut/testing only.
Boot BIOS Destination Select to LPC/PCI by
functional strap or using Boot BIOS Destination Bit
will not affect SPI accesses initiated by Management
Engine or Integrated GbE LAN.
Table 2-28. Functional Strap Definitions (Sheet 2 of 4)
Signal Usage When
Sampled Comment
Bit11 Bit 10 Boot BIOS
Destination
01 Reserved
10 PCI
11 SPI
00 LPC
Bit11 Bit 10 Boot BIOS
Destination
01 Reserved
10 PCI
11 SPI
00 LPC
Datasheet 95
Signal Description
GNT2#/
GPIO53
ESI Strap
(Server Only)
Rising edge of
PWROK
This Signal has a weak internal pull-up.
Note that the internal pull-up is disabled after PCIRST# de-
asserts.
Tying this strap low configures DMI for ESI compatible
operation.
NOTE: ESI compatible mode is for server platforms only.
This signal should not be pulled low for desktop and
mobile.
NV_ALE Reserved Rising edge of
PWROK
This signal has a weak internal pull down.
NOTE: This signal should not be pulled high
HDA_DOCK_E
N#/GPIO[33]
Flash Descriptor
Security
Override/ ME
Debug Mode
Rising edge of
PWROK
Signal has a weak internal pull-up.
If strap is sampled high, the security measures defined in
the Flash Descriptor will be in effect (default).
If sampled low, the Flash Descriptor Security will be
overridden.
This strap should only be asserted low using external pull
down in manufacturing/debug environments ONLY.
NOTE: Asserting the GPIO33 low on the rising edge of
PWROK will also halt Intel® Management Engine
after chipset bringup and disable runtime Intel®
Management Engine features. This is a debug mode
and must not be asserted after manufacturing/
debug.
SPI_MOSI Reserved Rising edge of
MEPWROK
This signal has a weak internal pull-down resistor. This
signal must be sampled low.
NV_CLE DMI Termination
Voltage
Rising edge
of PWROK This signal has a weak internal pull-down.
HDA_SDO Reserved Rising edge of
RSMRST#
This signal has a weak internal pull down.
NOTE: This signal should not be pulled high
GPIO8 Reserved Rising edge of
RSMRST#
This signal has a weak internal pull up. Note that the weak
internal pull-up is disabled after RSMRST# de-asserts.
NOTE: This signal should not be pulled low
GPIO27 Reserved Rising edge of
RSMRST#
This signal has a weak internal pull-up. note that the weak
internal pull-up is disabled after RSMRST# de-asserts.
NOTE: This signal should not be pulled low and can be left
as a No Connect.
HDA_SYNC
On-Die PLL
Voltage
Regulator
Voltage Select
Rising edge of
RSMRST# pin
This signal has a weak internal pull down.
On-Die PLL VR is supplied by 1.8 V when sampled low.
NOTE: This signal should not be pulled high.
Table 2-28. Functional Strap Definitions (Sheet 3 of 4)
Signal Usage When
Sampled Comment
Signal Description
96 Datasheet
NOTE: See Section 3.1 for full details on pull-up/pull-down resistors.
GPIO15 Reserved Rising edge of
RSMRST# pin
Low = Intel® Management Engine Crypto Transport Layer
Security (TLS) cipher suite with no confidentiality
High = Intel® Management Engine Crypto TLS cipher suite
with confidentiality
This signal has a weak internal pull down.
NOTE: A strong pull up may be needed for GPIO
functionality
NOTE: This signal is required to be pulled up to enable TLS.
If this signal is pulled down or left floating Intel®
RPAT and Intel® AMT with TLS will not be
functional.
L_DDC_DATA LVDS Rising Edge of
PWROK
This signal has a weak internal pull-down.
Note that the weak internal pull-down is disabled after
PLTRST# de-asserts.
LVDS is enabled when sampled high. When sampled low
LVDS is Disabled.
SDVO_CTRLDA
TA
Digital Display
Port (Port B)
Rising Edge of
PWROK
This signal has a weak internal pull-down.
Note that the weak internal pull-down is disabled after
PLTRST# de-asserts.
Port B is enabled when sampled high. When sampled low
Port B is Disabled.
DDPC_CTRLDA
TA
Digital Display
Port (Port C)
Rising Edge of
PWROK
This signal has a weak internal pull-down.
Note that the weak internal pull-down is disabled after
PLTRST# de-asserts.
Port C is enabled when sampled high. When sampled low
Port C is Disabled.
DDPD_CTRLDA
TA
Digital Display
Port (Port D)
Rising Edge of
PWROK
This signal has a weak internal pull-down.
Note that the weak internal pull-down is disabled after
PLTRST# de-asserts.
Port D is enabled when sampled high. When sampled low
Port D is Disabled.
Table 2-28. Functional Strap Definitions (Sheet 4 of 4)
Signal Usage When
Sampled Comment
Datasheet 97
Signal Description
2.28.2 External RTC Circuitry
The PCH implements an internal oscillator circuit that is sensitive to step voltage
changes in VccRTC. Figure 2-2 shows an example schematic recommended to ensure
correct operation of the PCH RTC.
Notes:
1. The exact capacitor values for C1 and C2 must be based on the crystal maker recommendations.
2. Vbatt is voltage provided by the battery.
3. VccRTC, RTCX1, and RTCX2 are PCH pins.
4. VccRTC powers PCH RTC well.
5. RTCX1 is the input to the internal oscillator.
6. RTCX2 is the amplified feedback for the external crystal.
§ §
Figure 2-2. Example External RTC Circuit
32.768 KHz
Xtal
10MΩ
VCCRTC
RTCX2
RTCX1
Vbatt
1uF
1 K Ω
3.3V Sus
C1 C2
R1
RTCRST#
1.0 uF
20 KΩ
0.1uF
SRTCRST#
20 KΩ
1.0 uF
Schottky Diodes
Signal Description
98 Datasheet
Datasheet 99
PCH Pin States
3 PCH Pin States
3.1 Integrated Pull-Ups and Pull-Downs
Table 3-1. Integrated Pull-Up and Pull-Down Resistors (Sheet 1 of 2)
Signal Resistor Nominal Notes
CL_CLK1 Pull-up/Pull-
down 32/100 13, 22
CL_DATA1 Pull-up/Pull-
down 32/100 13, 22
CLKOUTFLEX[3:0]/GPIO[67:64] Pull-down 20K 1, 16
HDA_RST# Pull-down 20K 2, 16
GPIO15 Pull-down 20K 3, 21
HDA_BCLK Pull-down 20K 1, 16
HDA_DOCK_EN#/GPIO33 Pull-up 20K 3, 7
HDA_SDIN[3:0] Pull-down 20K 2
HDA_DOCK_RST# /GPIO13 Pull-down 20K 19, 20
HDA_SYNC, HDA_SDO Pull-down 20K 2, 7
GNT[3:1]#/GPIO[55,53,51], GNT0# Pull-up 20K 3, 11, 12
GPIO8 Pull-up 20K 3, 21
LAD[3:0]# / FHW[3:0]# Pull-up 20K 3
LDRQ0#, LDRQ1# / GPIO23 Pull-up 20K 3
NV_ALE, NV_CLE Pull-down 20K 13
PME# Pull-up 20K 3
INIT3_3V# Pull-up 20K 3
PWRBTN# Pull-up 20K 3
SPI_MOSI Pull-down 20K 3,7
SPI_CS0#, SPI_CS1#, SPI_MISO Pull-up 20K 3
SPKR Pull-down 20K 3,15
TACH[3:0]/GPIO[7,6,1,17] Pull-up 20K 3;only on TACH[3:0]
USB[13:0] [P,N] Pull-down 20K 5
DDP[D:C]_CTRLCLK Pull-down 10K
DDP[D:C]_CRTLDATA Pull down 20K 3, 15
SDVO_CTRLDATA,L_DDC_DATA Pull down 20K 3, 15
SDVO_CTRLCLK Pull down 20K 3
BATLOW#/GPIO72 Pull-up 20K 3
CLKOUT_PCI[4:0] Pull-down 20K 1, 16
GPIO27 Pull-up 20K 3, 21
PCIECLKRQ0#/GPIO73 Pull-up 20K 3, 21
JTAG_TDI, JTAG_TMS, TRST# Pull-up 20K 1, 17
PCH Pin States
100 Datasheet
NOTES:
1. Simulation data shows that these resistor values can range from 10 kΩ to 40 kΩ.
2. Simulation data shows that these resistor values can range from 9 kΩ to 50 kΩ.
3. Simulation data shows that these resistor values can range from 15 kΩ to 40 kΩ.
4. Simulation data shows that these resistor values can range from 7.5kΩ to 16kΩ.
5. Simulation data shows that these resistor values can range from 14.25 kΩ to 24.8 kΩ.
6. Simulation data shows that these resistor values can range from 10 kΩ to 30 kΩ.
7. The pull-up or pull-down on this signal is only enabled at boot/reset for strapping function.
8. Simulation data shows that these resistor values can range from 10 kΩ to 20 kΩ.
The internal pull-up is only enabled during PLTRST# assertion.
9. The pull-down on this signal is only enabled when in S3.
10. The pull-up or pull-down on this signal is only enabled during reset.
11. The pull-up on this signal is not enabled when PCIRST# is high.
12. The pull-up on this signal is not enabled when PWROK is low.
13. Simulation data shows that these resistor values can range from 15 kΩ to 31 kΩ.
14. The pull-down is disabled after pins are driven strongly to logic zero when PWROK
is asserted.
15. The Pull-up or pull down is not active when PLTRST# is NOT asserted.
16. The pull-down is enabled when PWROK is low.
17. External termination is also required on these signals for JTAG enabling. Internal pull-up
is added in B-step Silicon.
18. External termination is also required on these signals for JTAG enabling. Internal pull-down
is added in B-step Silicon.
19. Simulation data shows that these resistor values can range from 20 kΩ to 27 kΩ.
20. Pull-down is enabled only when PCIRST# pin is driven low.
21. Pull-up is disabled after RSMRST# is de-asserted.
22. The Controller Link Clock and Data buffers use internal pull-up or pull-down resistors
to drive a logical 1 or 0.
JTAG_TCK Pull-down 20K 1, 18
GPIO28 Pull-up 20K 3
PCIECLKRQ6#/GPIO45 Pull-up 20K 3
Table 3-1. Integrated Pull-Up and Pull-Down Resistors (Sheet 2 of 2)
Signal Resistor Nominal Notes
Datasheet 101
PCH Pin States
3.2 Output and I/O Signals Planes and States
Table 3.2and Table 3-3 shows the power plane associated with the output and I/O
signals, as well as the state at various times. Within the table, the following terms are
used:
“High-Z” Tri-state. The PCH not driving the signal high or low.
“High” The PCH is driving the signal to a logic 1.
“Low” The PCH is driving the signal to a logic 0.
“Defined” Driven to a level that is defined by the function or external pull-
up/pull-down resistor (will be high or low).
“Undefined” The PCH is driving the signal, but the value is indeterminate.
“Running” Clock is toggling or signal is transitioning because function not
stopping.
“Off” The power plane is off; The PCH is not driving when configured
as an output or sampling when configured as an input.
“Input” The PCH is sampling and signal state determined by external
driver.
Note: Signal levels are the same in S4 and S5, except as noted.
The PCH suspend well signal states are indeterminate and undefined and may glitch
prior to RSMRST# de-assertion. This does not apply to SLP_S3#, SLP_S4#, SLP_S5#,
GPIO24, and GPIO29. These signals are determinate and defined prior to RSMRST# de-
assertion.
The PCH core well signal states are indeterminate and undefined and may glitch prior to
PWROK assertion. This does not apply to THRMTRIP#. This signal is determinate and
defined prior to PWROK assertion.
Table 3-2. Power Plane and States for Output and I/O Signals for Desktop Configurations
(Sheet 1 of 5)
Signal Name Power
Plane
During
Reset2
Immediately
after Reset2S0/S1 S3 S4/S5
PCI Express*
PETp[8:1], PETn[8:1] Core High High5Defined OFF OFF
DMI
DMI[3:0]TXP,
DMI[3:0]TXN Core High High Defined Off Off
PCI Bus
AD[31:0] Core Low Undefined Defined Off Off
C/BE[3:0]# Core Low Undefined Defined Off Off
DEVSEL# Core High-Z High-Z High-Z Off Off
FRAME# Core High-Z High-Z High-Z Off Off
GNT0#8, GNT[3:1]#8/
GPIO[55, 53, 51] Core High High High Off Off
IRDY#, TRDY# Core High-Z High-Z High-Z Off Off
PCH Pin States
102 Datasheet
PAR Core Low Low Low Off Off
PCIRST# Suspend Low High High Low Low
PERR# Core High-Z High-Z High-Z Off Off
PLOCK# Core High-Z High-Z High-Z Off Off
STOP# Core High-Z High-Z High-Z Off Off
LPC/FWH Interface
LAD[3:0] / FWH[3:0] Core High High High Off Off
LFRAME# / FWH[4] Core High High High Off Off
INIT3_3V#8Core High High High Off Off
SATA Interface
SATA[5:0]TXP,
SATA[5:0]TXN Core High-Z High-Z Defined Off Off
SATALED# Core High-Z High-Z Defined Off Off
SATAICOMPO Core High High Defined Off Off
SCLOCK/GPIO22 Core High-Z (Input) High-Z (Input) Defined Off Off
SLOAD/GPIO38 Core High-Z (Input) High-Z (Input) Defined Off Off
SDATAOUT[1:0]/
GPIO[48,39] Core High-Z High-Z High-Z Off Off
Interrupts
PIRQ[A:D]#, Core High-Z High-Z High-Z Off Off
PIRQ[H:E]# /
GPIO[5:2] Core High-Z (Input) High-Z (Input) Defined Off Off
SERIRQ Core High-Z High-Z High-Z Off Off
USB Interface
USB[13:0][P,N] Suspend Low Low Defined Defined Defined
USBRBIAS Suspend High-Z High-Z High High High
Power Management
LAN_PHY_PWR_CTRL11
/GPIO12 Suspend Low Low Defined Defined Defined
PLTRST# Suspend Low High High Low Low
SLP_M#6Suspend Low High High Defined Defined
SLP_S3# Suspend Low High High Low Low
SLP_S4# Suspend Low High High High Low
SLP_S5#/GPIO63 Suspend Low High High High Low3
SUS_STAT#/GPIO61 Suspend Low High High Low Low
SUSCLK/GPIO62 Suspend Low Running
DRAMPWROK Suspend Low High-Z High-Z High-Z Low
PMSYNCH Core Low Low Defined Off Off
Table 3-2. Power Plane and States for Output and I/O Signals for Desktop Configurations
(Sheet 2 of 5)
Signal Name Power
Plane
During
Reset2
Immediately
after Reset2S0/S1 S3 S4/S5
Datasheet 103
PCH Pin States
STP_PCI#/GPIO34 Core High-Z (Input) High-Z (Input) Defined Off Off
SLP_LAN#/GPIO299Suspend Low Defined9High Defined Defined
Processor Interface
A20M# CPU
Dependant on
A20GATE
Signal
See Note 1 High Off Off
PROCPWRGD CPU Low3High High Off Off
SMBus Interface
SMBCLK, SMBDATA Suspend High-Z High-Z Defined Defined Defined
System Management Interface
SML0ALERT# / GPIO60 Suspend High-Z High-Z12 Defined Defined Defined
SML0DATA Suspend High-Z High-Z Defined Defined Defined
SML0CLK Suspend High-Z High-Z Defined Defined Defined
GPIO58/SML1CLK Suspend High-Z High-Z Defined Defined Defined
SML1ALERT#/GPIO74 Suspend High-Z High-Z Defined Defined Defined
SML1DATA//GPIO75 Suspend High-Z High-Z Defined Defined Defined
JTAG_TDO Suspend High-Z High-Z High-Z High-Z High-Z
Miscellaneous Signals
SPKR8Core Low Low Defined Off Off
Clocking Signals
CLKOUT_BCLK0_P /
CLKOUT_PCIE8_P,
CLKOUT_BCLK0_N /
CLKOUT_PCIE8_N
Core Running Running Running Off Off
CLKOUT_DP_P /
CLKOUT_BCLK1_P,
CLKOUT_DP_N /
CLKOUT_BCLK1_N
Core Running Running Running Off Off
CLKOUT_DMI_P,
CLKOUT_DMI_N Core Running Running Running Off Off
CLKOUT_PEG_A_P,
CLKOUT_PEG_A_N Core Running Running Running Off Off
CLKOUT_PEG_B_P,
CLKOUT_PEG_B_N Core Running Running Running Off Off
CLKOUT_PCIE[7:0] P,
CLKOUT_PCIE[7:0] N Core Running Running Running Off Off
CLKOUT_PCI[4:0] Core Running Running Running Off Off
CLKOUTFLEX[3:0]/
GPIO[67:64] Core Low Low Running/
Low Off Off
XTAL25_OUT Core Running Running Running Off Off
XCLK_RCOMP Core High-Z High-Z High-Z Off Off
Table 3-2. Power Plane and States for Output and I/O Signals for Desktop Configurations
(Sheet 3 of 5)
Signal Name Power
Plane
During
Reset2
Immediately
after Reset2S0/S1 S3 S4/S5
PCH Pin States
104 Datasheet
Intel® High Definition Audio Interface
HDA_RST# HDA
Suspend Low Low4Defined Low Low
HDA_SDO8HDA
Suspend Low Low Low Low Low
HDA_SYNC8HDA
Suspend Low Low Low Low Low
HDA_BCLK HDA
Suspend Low Low Low Low Low
UnMultiplexed GPIO Signals
GPIO88Suspend High High Defined Defined Defined
GPIO158Suspend Low Low Defined Defined Defined
GPIO24 Suspend Low Low Defined Defined Defined
GPIO278Suspend High Low Defined Defined Defined
GPIO32 Core High High Defined Off Off
GPIO35 Core Low Low Defined Off Off
GPIO57 Suspend High-Z (Input) High-Z (Input) Defined Defined Defined
GPIO72 Suspend High-Z (Input) High-Z (Input) Defined Defined Defined
Multiplexed GPIO Signals used as GPIO only
GPIO0 Core High-Z (Input) High-Z(Input) Defined Off Off
GPIO1310, 14 HDA
Suspend Low High-Z Defined Defined Defined
GPIO28 Suspend High-Z High-Z Defined Defined Defined
GPIO3010 Suspend High-Z (Input) High-Z (Input) Defined Defined Defined
GPIO3110 Suspend High-Z (Input) High-Z (Input) Defined Defined Defined
GPIO3310 Core High High Defined Off Off
SPI Interface
SPI_CS0# ME33IO High13 High Defined Defined Defined
SPI_CS1# ME33IO High13 High Defined Defined Defined
SPI_MOSI8ME33IO Low13 Low Defined Defined Defined
SPI_CLK ME33IO Low13 Low Running Defined Defined
Intel® Quiet System Technology and Thermal Reporting
PWM[3:0] Core High-Z Low Defined Off Off
SST Suspend High-Z Low Defined Off Off
PECI CPU Low Low Defined Off Off
Analog Display / CRT DAC Signals
CRT_RED, CRT_GREEN,
CRT_BLUE Core High-Z High-Z High-Z Off Off
DAC_IREF Core High-Z High-Z High-Z Off Off
Table 3-2. Power Plane and States for Output and I/O Signals for Desktop Configurations
(Sheet 4 of 5)
Signal Name Power
Plane
During
Reset2
Immediately
after Reset2S0/S1 S3 S4/S5
Datasheet 105
PCH Pin States
NOTES:
1. PCH drives PROCPWRGD after PWROK and SYS_PWROK signals are active, and thus will be
driven low by PCH when either of these signals are inactive. During boot, or during a hard
reset with power cycling, PROCPWRGD will be expected to transition from low to High-Z
2. The states of Core and processor signals are evaluated at the times During PLTRST# and
Immediately after PLTRST#. The states of the LAN and GLAN signals are evaluated at the
times During LAN_RST# and Immediately after LAN_RST#. The states of the Controller
Link signals are taken at the times During CL_RST1# and Immediately after CL_RST1#.
The states of the Suspend signals are evaluated at the times During RSMRST# and
Immediately after RSMRST#, with an exception to GPIO signals; see Section 2.25 for more
details on GPIO state after reset. The states of the HDA signals are evaluated at the times
During HDA_RST# and Immediately after HDA_RST#.
3. SLP_S5# signals will be high in the S4 state.
4. Low until Intel® High Definition Audio Controller Reset bit set (D27:F0:Offset
HDBAR+08h:bit 0), at which time HDA_RST# will be High and HDA_BIT_CLK will be
Running.
5. PETp/n[8:1] high until port is enabled by software.
6. The SLP_M# state will be determined by Intel® Management Engine Firmware.
7. The state of signals in S3–S5 will be defined by Intel® AMT Policies.
8. This signal is sampled as a functional strap during reset. See Functional straps definition
table for usage.
9. SLP_LAN# behavior after reset is dependent on value of SLP_LAN# default value bit.
CRT_HSYNC Core Low Low Low Off Off
CRT_VSYNC Core Low Low Low Off Off
CRT_DDC_CLK Core High-Z High-Z High-Z Off Off
CRT_DDC_DATA Core High-Z High-Z High-Z Off Off
CRT_IRTN Core High-Z High-Z High-Z Off Off
Intel® Flexible Display Interface
FDI_RXP[7:0],
FDI_RXN[7:0] Core High-Z High-Z High-Z Off Off
FDI_FSYNC[1:0] Core High-Z High-Z High-Z Off Off
FDI_LSYNC[1:0] Core High-Z High-Z High-Z Off Off
FDI_INT Core High-Z High-Z High-Z Off Off
Digital Display Interface
DDP[D:B]_[3:0]P,
DDP[D:B]_[3:0]N Core High-Z High-Z Defined Off Off
DDP[D:B]_AUXP,
DDP[D:B]_AUXN Core High-Z High-Z Defined Off Off
SDVO_CTRLCLK,
SDVO_CTRLDATA Core Low High-Z Defined Off Off
DDPC_CTRLCLK,
DDPC_CTRLDATA Core High-Z High-Z Defined Off Off
DDPD_CTRLCLK,
DDPD_CTRLDATA Core High-Z High-Z Defined Off Off
Table 3-2. Power Plane and States for Output and I/O Signals for Desktop Configurations
(Sheet 5 of 5)
Signal Name Power
Plane
During
Reset2
Immediately
after Reset2S0/S1 S3 S4/S5
PCH Pin States
106 Datasheet
10. Native functionality multiplexed with these GPIOs are not used in Desktop Configurations.
During reset an Internal pull-down will drive this pin low. The pull down will be disabled
after PCIRST# de-assertion.
11. Native/GPIO functionality controlled using soft straps. Default to Native functionality until
soft straps are loaded.
12. State of the pins depend on the source of VccME3_3 power.
13. Pin is tri-stated prior to MEPWROK assertion during Reset.
14. GPIO13 is powered by VccSusHDA (either 3.3 V or 1.5 V). Pin tolerance is determined by
VccSusHDA voltage.
Table 3-3. Power Plane and States for Output and I/O Signals for Mobile Configurations
(Sheet 1 of 5)
Signal Name Power
Plane
During
Reset2
Immediately
after Reset2
C-x
states S0/S1 S3 S4/S5
PCI Express*
PET[8:1]p,
PET[8:1]n Core High High5Defined Defined Off Off
DMI
DMI[3:0]TXP,
DMI[3:0]TXN Core High High Defined Defined Off Off
PCI Bus
AD[31:0] Core Low Undefined Defined Defined Off Off
C/BE[3:0]# Core Low Undefined Defined Defined Off Off
CLKRUN#18 (Mobile
Only) / GPIO32 Core Low Low Defined Defined Off Off
GNT0#8
GNT[3:1]#8/
GPIO[55,53,51]
Core High High High High Off Off
DEVSEL# Core High-Z High-Z High-Z High-Z Off Off
FRAME# Core High-Z High-Z High-Z High-Z Off Off
IRDY#, TRDY# Core High-Z High-Z High-Z High-Z Off Off
PAR Core Low Undefined Defined Defined Off Off
PCIRST# Suspend Low High High High Low Low
PERR# Core High-Z High-Z High-Z High-Z Off Off
PLOCK# Core High-Z High-Z High-Z High-Z Off Off
STOP# Core High-Z High-Z High-Z High-Z Off Off
Datasheet 107
PCH Pin States
LPC/FWH Interface
LAD[3:0] /
FWH[3:0] Core High High High High Off Off
LFRAME# / FWH[4] Core High High High High Off Off
INIT3_3V#8Core High High High High Off Off
SATA Interface
SATA[5:0]TXP,
SATA[5:0]TXN Core High-Z High-Z Defined Defined Off Off
SATALED# Core High-Z High-Z Defined Defined Off Off
SATAICOMPO Core High-Z High-Z Defined Defined Off Off
SCLOCK/GPIO22 Core High-Z
(Input) High-Z (Input) Defined Defined Off Off
SLOAD/GPIO38 Core High-Z
(Input) High-Z (Input) Defined Defined Off Off
SDATAOUT[1:0]/
GPIO[48,39] Core High-Z
(Input) High-Z (Input) Defined Defined Off Off
Interrupts
PIRQ[A:D]# Core High-Z High-Z Defined Defined Off Off
PIRQ[H:E]# /
GPIO[5:2] Core High-Z
(Input) High-Z (Input) Defined Defined Off Off
SERIRQ Core High-Z High-Z Running High-Z Off Off
USB Interface
USB[13:0][P,N] Suspend Low Low Defined Defined Defined Defined
USBRBIAS Suspend High-Z High-Z Defined Defined Defined Defined
Power Management
PLTRST# Suspend Low High High High Low Low
SLP_M#6Suspend Low High High High Defined Defined
SLP_S3# Suspend Low High High High Low Low
SLP_S4# Suspend Low High High High High Defined
SLP_S5#/GPIO63 Suspend Low High High High High Low3
SUS_STAT#/GPIO61 Suspend Low High High High Low Low
SUSCLK Suspend Low Running
SUS_PWR_DN_ACK/
GPIO30 Suspend High-Z
(Input) High-Z (Input) Defined Defined Defined Defined
DRAMPWROK Suspend Low High-Z High-Z High-Z High-Z Low
LAN_PHY_PWR_CTR
L10/GPIO12 Suspend Low Low Defined Defined Defined Defined
PMSYNCH Core Low Low Defined/
Low Defined Off Off
STP_PCI#/GPIO34 Core High-Z
(Input) High-Z (Input) Defined Defined Off Off
SLP_LAN#15/
GPIO29 Suspend Low Defined15 High High Defined Defined
Table 3-3. Power Plane and States for Output and I/O Signals for Mobile Configurations
(Sheet 2 of 5)
Signal Name Power
Plane
During
Reset2
Immediately
after Reset2
C-x
states S0/S1 S3 S4/S5
PCH Pin States
108 Datasheet
Processor Interface
PROCPWRGD1Core Low High High High Off Off
SMBus Interface
SMBCLK, SMBDATA Suspend High-Z High-Z Defined Defined Defined Defined
System Management Interface
SML0ALERT#/
GPIO60 Suspend High-Z High-Z Defined Defined Defined Defined
SML0DATA Suspend High-Z High-Z Defined Defined Defined Defined
SML0CLK Suspend High-Z High-Z Defined Defined Defined Defined
GPIO58/SML1CLK Suspend High-Z High-Z Defined Defined Defined Defined
SML1ALERT#/
GPIO74 Suspend High-Z High-Z Defined Defined Defined Defined
SML1DATA/GPIO75 Suspend High-Z High-Z Defined Defined Defined Defined
JTAG_TDO Suspend High-Z High-Z High-Z High-Z High-Z High-Z
Miscellaneous Signals
SPKR8Core Low Low Defined Defined Off Off
Clocking Signals
CLKOUT_BCLK0_P /
CLKOUT_PCIEB_P,
CLKOUT_BCLK0_N /
CLKOUT_PCIEB_N
Core Running Running Running Running Off Off
CLKOUT_DP_P /
CLKOUT_BCLK1_P,
CLKOUT_DP_N /
CLKOUT_BCLK1_N,
Core Running Running Running Running Off Off
CLKOUT_DMI_P,
CLKOUT_DMI_N Core Running Running Running Running Off Off
XTAL25_OUT Core High-Z High-Z High-Z High-Z Off Off
XCLK_RCOMP Core High-Z High-Z High-Z High-Z Off Off
CLKOUT_PEG_A_P,
CLKOUT_PEG_A_N Core Running Running Running Running Off Off
CLKOUT_PEG_B_P,
CLKOUT_PEG_B_N Core Running Running Running Running Off Off
CLKOUT_PCIE[7:0]
P,
CLKOUT_PCIE[7:0]
N
Core Running Running Running Running Off Off
CLKOUT_PCI[4:0] Core Running Running Running Running Off Off
CLKOUTFLEX[3:0]/
GPIO[67:64] Core Low Low Running/
Low Running Off Off
Intel® High Definition Audio Interface
HDA_RST# HDA
Suspend Low Low4High Defined Low Low
Table 3-3. Power Plane and States for Output and I/O Signals for Mobile Configurations
(Sheet 3 of 5)
Signal Name Power
Plane
During
Reset2
Immediately
after Reset2
C-x
states S0/S1 S3 S4/S5
Datasheet 109
PCH Pin States
HDA_SDO8HDA
Suspend Low Low Low Low Low Low
HDA_SYNC8HDA
Suspend Low Low Low Low Low Low
HDA_BCLK HDA
Suspend Low Low Low Low Low Low
HDA_DOCK_EN#/
GPIO33 Core High High12 Defined Defined Off Off
HDA_DOCK_RST#/
GPIO1319
HDA
Suspend Low11 High-Z11 Defined Defined Defined Defined
UnMultiplexed GPIO Signals
GPIO88Suspend High High Defined Defined Defined Defined
GPIO158Suspend Low Low Defined Defined Defined Defined
GPIO24 Suspend Low Low Defined Defined Defined Defined
GPIO278Suspend High Low Defined Defined Defined Defined
GPIO28 Suspend High-Z High-Z Defined Defined Defined Defined
GPIO35 Core Low Low Defined Defined Off Off
GPIO57 Suspend High-Z
(Input) High-Z (Input) Defined Defined Defined Defined
Multiplexed GPIO Signals used as GPIO only
GPIO0 Core High-Z
(Input) High-Z (Input) Defined Defined Off Off
GPIO[7,6,1,17]9Core High-Z High-Z Defined Defined Off Off
SPI Interface
SPI_CS0# ME33IO High17 High Defined Defined Defined Defined
SPI_CS1# ME33IO High17 High Defined Defined Defined Defined
SPI_MOSI8ME33IO Low17 Low Defined Defined Defined Defined
SPI_CLK ME33IO Low17 Low Running Running Defined Defined
Intel® Quiet System Technology and Thermal Reporting
PECI CPU Low Low Defined Defined Off Off
Controller Link
CL_CLK16Suspend High/Low14 High/Low14 Defined Defined Defined Defined
CL_DATA16Suspend High/Low14 High/Low14 Defined Defined Defined Defined
CL_RST1#6Suspend Low High High High High High
LVDS Signals
LVDSA_DATA[3:0],
LVDSA_DATA#[3:0] Core High-Z High-Z Defined/
High-Z13
Defined/
High-Z13 Off Off
LVDSA_CLK,
LVDSA_CLK# Core High-Z High-Z Defined/
High-Z13
Defined/
High-Z13 Off Off
LVDSB_DATA[3:0],
LVDSB_DATA#[3:0] Core High-Z High-Z Defined/
High-Z13
Defined/
High-Z13 Off Off
Table 3-3. Power Plane and States for Output and I/O Signals for Mobile Configurations
(Sheet 4 of 5)
Signal Name Power
Plane
During
Reset2
Immediately
after Reset2
C-x
states S0/S1 S3 S4/S5
PCH Pin States
110 Datasheet
LVDSB_CLK,
LVDSB_CLK# Core High-Z High-Z Defined/
High-Z13
Defined/
High-Z13 Off Off
L_DDC_CLK Core High-Z High-Z High-Z High-Z Off Off
L_DDC_DATA Core Low High-Z High-Z High-Z Off Off
L_VDD_EN Core High-Z High-Z High/
High-Z13
High/
High-Z13 Off Off
L_BKLTEN Core High-Z High-Z High/
High-Z13
High/
High-Z13 Off Off
L_BKLTCTL Core High-Z High-Z High/
High-Z13
High/
High-Z13 Off Off
L_CTRL_CLK Core High-Z High-Z High-Z High-Z Off Off
L_CTRL_DATA Core High-Z High-Z High-Z High-Z Off Off
LVD_VBG,
LVD_VREFH,
LVD_VREFL
Core High-Z High-Z High-Z High-Z Off Off
Analog Display / CRT DAC Signals
CRT_RED,
CRT_GREEN,
CRT_BLUE
Core High-Z High-Z Defined Defined Off Off
DAC_IREF Core High-Z High-Z High-Z High-Z Off Off
CRT_HSYNC Core Low Low Low Low Off Off
CRT_VSYNC Core Low Low Low Low Off Off
CRT_DDC_CLK Core High-Z High-Z High-Z High-Z Off Off
CRT_DDC_DATA Core High-Z High-Z High-Z High-Z Off Off
CRT_IRTN Core High-Z High-Z High-Z High-Z Off Off
Intel® Flexible Display Interface
FDI_RXP[7:0],
FDI_RXN[7:0] Core High-Z High-Z Defined Defined Off Off
FDI_FSYNC[1:0] Core High-Z High-Z Defined Defined Off Off
FDI_LSYNC[1:0] Core High-Z High-Z Defined Defined Off Off
FDI_INT Core High-Z High-Z Defined Defined Off Off
Digital Display Interface
DDP[D:B]_[3:0]P,
DDP[D:B]_[3:0]N, Core High-Z High-Z Defined Defined Off Off
DDP[D:B]_AUXP,
DDP[D:B]_AUXN Core High-Z High-Z Defined Defined Off Off
SDVO_CTRLCLK,
SDVO_CTRLDATA Core Low High-Z Defined Defined Off Off
DDPC_CTRLCLK,
DDPC_CTRLDATA Core High-Z High-Z Defined Defined High-Z Off
DDPD_CTRLCLK,
DDPD_CTRLDATA Core High-Z High-Z Defined Defined High-Z Off
Table 3-3. Power Plane and States for Output and I/O Signals for Mobile Configurations
(Sheet 5 of 5)
Signal Name Power
Plane
During
Reset2
Immediately
after Reset2
C-x
states S0/S1 S3 S4/S5
Datasheet 111
PCH Pin States
NOTES:
1. PCH drives PROCPWRGD after PWROK and SYS_PWROK signals are active, and thus will be
driven low by PCH when either of these signals are inactive. During boot, or during a hard
reset with power cycling, PROCPWRGD will be expected to transition from low to High-Z
2. The states of Core and processor signals are evaluated at the times during PLTRST# and
Immediately after PLTRST#. The states of the LAN and GLAN signals are evaluated at the
times During LAN_RST# and Immediately after LAN_RST#. The states of the Controller
Link signals are taken at the times During CL_RST1# and Immediately after CL_RST1#.
The states of the Suspend signals are evaluated at the times During RSMRST# and
Immediately after RSMRST#, with an exception to GPIO signals; see Section 2.25 for more
details on GPIO state after reset. The states of the HDA signals are evaluated at the times
During HDA_RST# and Immediately after HDA_RST#.
3. SLP_S5# signals will be high in the S4 state.
4. Low until Intel® High Definition Audio Controller Reset bit set (D27:F0:Offset
HDBAR+08h:bit 0), at which time HDA_RST# will be High and HDA_BIT_CLK will be
Running.
5. PETp/n[8:1] high until port is enabled by software.
6. The SLP_M# state will be determined by Intel® Management Engine Firmware.
7. The state of signals in S3–S5 will be defined by Intel® AMT Policies.
8. This signal is sampled as a functional strap during Reset. See Functional straps definition
table for usage.
9. Native functionality multiplexed with these GPIOs is not used in Mobile Configurations.
10. Native/GPIO functionality controlled using soft straps. Default to Native functionality until
soft straps are loaded.
11. This pin will be driven to a High when Dock Attach bit is set (Docking Control Register
D27:F0 offset 4Ch). During reset an Internal pull-down will drive this pin low. The pull
down will be disabled after PCIRST# de-assertion.
12. This pin will be driven to a Low when Dock Attach bit is set (Docking Control Register
D27:F0 offset 4Ch).
13. PCH tristates these signals when LVDS port is disabled.
14. Controller Link Clock and Data buffers use internal pull-up and pull-down resistors to drive
a logical 1 or a 0.
15. SLP_LAN# behavior after reset is dependent on value of SLP_LAN# default value bit.
16. State of the pins depend on the source of VccME3_3 power.
17. Pin is tri-stated prior to MEPWROK assertion during Reset.
18. CLKRUN# is driven to a logic 1 during reset for Mobile configurations (default is native
function) to ensure that PCI clocks can toggle before devices come out of reset. For
desktop configurations this pin defaults to GPIO mode strongly driving a logic 1.
19. HDA_DOCK_RST#/GPIO13 is powered by VccSusHDA (either 3.3 V or 1.5 V). Pin tolerance
is determined by VccSusHDA voltage.
PCH Pin States
112 Datasheet
3.3 Power Planes for Input Signals
Table 3-4 and Table 3-5 show the power plane associated with each input signal, as
well as what device drives the signal at various times. Valid states include:
•High
•Low
Static: Will be high or low, but will not change
Driven: Will be high or low, and is allowed to change
Running: For input clocks
The PCH suspend well signal states are indeterminate and undefined and may glitch
prior to RSMRST# de-assertion. This does not apply to LAN_RST#, SLP_S3#,
SLP_S4#, S4_STATE# and SLP_S5#. These signals are determinate and defined prior
to RSMRST# de-assertion.
The PCH core well signal states are indeterminate and undefined and may glitch prior to
PWROK assertion. This does not apply to FERR# and THRMTRIP#. These signals are
determinate and defined prior to PWROK assertion.
Table 3-4. Power Plane for Input Signals for Desktop Configurations (Sheet 1 of 3)
Signal Name Power Well Driver During Reset S0/S1 S3 S4/S5
DMI
DMI_CLKP, DMI_CLKN Core Clock Generator Running Off Off
DMI[3:0]RXP, DMI[3:0]RXN Core Processor Driven Off Off
PCI Express*
PER[8:1]p, PERn[8:1]n Core PCI Express* Device Driven Off Off
PCI Bus
REQ0#,
REQ1# / GPIO501
REQ2# / GPIO521
REQ3# / GPIO541
Core External Pull-up Driven Off Off
PME# Suspend Internal Pull-up Driven Driven Driven
SERR# Core PCI Bus Peripherals High Off Off
LPC Interface
LDRQ0# Core LPC Devices High Off Off
LDRQ1# / GPIO231Core LPC Devices High Off Off
SATA Interface
SATA[5:0]RXP,
SATA[5:0]RXN Core SATA Drive Driven Off Off
SATAICOMPI Core High-Z High-Z Defined Off
SATA[5:4]GP/TEMP_ALERT/
GPIO[49,16]1Core External Device or
External Pull-up/Pull-down Driven Off Off
SATA[3:0]GP / GPIO[37, 36,
19, 21]1Core External Device or
External Pull-up/Pull-down Driven Off Off
Datasheet 113
PCH Pin States
USB Interface
OC[7:0]#/
GPIO[14,10,9,43:40,59]1Suspend External Pull-ups Driven Driven Driven
USBRBIAS# Suspend External Pull-down Driven Driven Driven
Power Management
MEPWROK Suspend External Circuit High Driven Driven
LAN_RST# Suspend External Circuit High Static Static
PWRBTN# Suspend Internal Pull-up Driven Driven Driven
PWROK RTC System Power Supply Driven Driven Driven
RI# Suspend Serial Port Buffer Driven Driven Driven
RSMRST# RTC External RC Circuit High High High
SYS_RESET# Core External Circuit Driven Off Off
SYS_PWROK Suspend External Circuit High Driven Driven
THRMTRIP# CPU External Thermal Sensor Driven Off Off
WAKE# Suspend External Pull-up Driven Driven Driven
Processor Interface
A20GATE Core External Micro controller Static Off Off
RCIN# Core External Micro controller High Off Off
System Management Interface
SMBALERT# / GPIO11 Suspend External Pull-up Driven Driven Driven
INTRUDER# RTC External Switch Driven High High
JTAG Interface
JTAG_TDI Suspend Internal Pull-up4High High High
JTAG_TMS Suspend Internal Pull-up4High High High
JTAG_TCK Suspend Internal Pull-down5Low Low Low
Miscellaneous Signals
INTVRMEN2RTC External Pull-up High High High
RTCRST# RTC External RC Circuit High High High
SRTCRST# RTC External RC Circuit High High High
Digital Display Interface
DDP[B:C:D]_HPD Core External Pull-down Driven Off Off
SDVO_INTP,
SDVO_INTN Core SDVO controller device Driven Off Off
SDVO_TVCLKINP,
SDVO_TVCLKINN Core SDVO controller device Driven Off Off
Table 3-4. Power Plane for Input Signals for Desktop Configurations (Sheet 2 of 3)
Signal Name Power Well Driver During Reset S0/S1 S3 S4/S5
PCH Pin States
114 Datasheet
NOTES:
1. These signals can be configured as outputs in GPIO mode.
2. This signal is sampled as a functional strap during Reset. See Functional straps definition
table for usage.
3. State of the pins depend on the source of VccME3_3 power.
4. Internal pull-ups are implemented.
5. Internal pull-down is implemented.
SDVO_STALLP,
SDVO_STALLN Core SDVO controller device Driven Off Off
Intel® Flexible Display Interface
FDI_RXP[7:0],
FDI_RXN[7:0] Core Processor Driven Off Off
Clock Interface
CLKIN_DMI_P, CLKIN_DMI_N Core Clock Generator Running Running Off
CLKIN_SATA_N/CKSSCD_N,
CLKIN_SATA_P/CKSSCD_P Core Clock Generator Running Running Off
CLKIN_BCLK_P,
CLKIN_BCLK_N Core Clock Generator Running Running Off
CLKIN_DOT_96P,
CLKIN_DOT_96N Core Clock Generator Running Running Off
CLKIN_PCILOOPBACK Core Clock Generator Running Running Off
PCIECLKRQ[7:3]#/
GPIO[46:44,26:25]1,PCIECL
KRQ0#/GPIO731
Suspend External Pull-up Driven Driven Driven
PCIECLKRQ[2:1]#/
GPIO[20:18]1Core External Pull-up Driven Driven Off
PEG_A_CLKRQ#/GPIO471,
PEG_B_CLKRQ#/GPIO561Suspend External Pull-up Driven Driven Driven
REFCLK14IN Core Clock Generator Running Running Off
XTAL25_IN Core Clock Generator High-Z High-Z High-Z
Intel® High Definition Audio Interface
HDA_SDIN[3:0] Suspend Internal Pull-down Low Low Low
SPI Interface
SPI_MISO ME33IO External Pull-up Driven Driven Driven
Intel® Quiet System Technology
TACH[3:0]/GPIO[7,6,1,17]1Core External Pull-up Driven Off Off
Table 3-4. Power Plane for Input Signals for Desktop Configurations (Sheet 3 of 3)
Signal Name Power Well Driver During Reset S0/S1 S3 S4/S5
Datasheet 115
PCH Pin States
Table 3-5. Power Plane for Input Signals for Mobile Configurations (Sheet 1 of 3)
Signal Name Power Well Driver During Reset C-x
states S0/S1 S3 S4/S5
DMI
DMI_CLKP, DMI_CLKN Core Clock Generator Running Running Off Off
DMI[3:0]RXP,
DMI[3:0]RXN Core Processor Driven Driven Off Off
PCI Express*
PER[6:1]p, PER[6:1]n Core PCI Express* Device Driven Driven Off Off
PCI Bus
REQ0#,
REQ1# / GPIO501
REQ2# / GPIO521
REQ3# / GPIO541
Core External Pull-up Driven Driven Off Off
PME# Suspend Internal Pull-up Driven Driven Driven Driven
SERR# Core PCI Bus Peripherals Driven High Off Off
LPC Interface
LDRQ0# Core Internal Pull-up Driven High Off Off
LDRQ1# / GPIO231Core Internal Pull-up Driven High Off Off
SATA Interface
SATA[5:0]RXP,
SATA[5:0]RXN Core SATA Drive Driven Driven Off Off
SATAICOMPI Core High-Z High-Z Defined Off Off
SATA[5:4]GP/
TEMP_ALERT/
GPIO[49,16]1
Core External Device or
External Pull-up/Pull-down Driven Driven Off Off
SATA[3:0]GP /
GPIO[37, 36, 19, 21]1Core External Device or
External Pull-up/Pull-down Driven Driven Off Off
USB Interface
OC[7:0]#/
GPIO[14,10,9,43:40,
59]
Suspend External Pull-ups Driven Driven Driven Driven
USBRBIAS# Suspend External Pull-down Driven Driven Driven Driven
Power Management
ACPRESENT (Mobile
Only) /GPIO311Suspend External Microcontroller Driven Driven Driven Driven
BATLOW# (Mobile
Only) /GPIO721Suspend External Pull-up High High Driven Driven
MEPWROK Suspend External Circuit Driven Driven Driven Driven
LAN_RST# Suspend External Circuit High High High High
PWRBTN# Suspend Internal Pull-up Driven Driven Driven Driven
PWROK RTC System Power Supply Driven Driven Off Off
RI# Suspend Serial Port Buffer Driven Driven Driven Driven
PCH Pin States
116 Datasheet
RSMRST# RTC External RC Circuit High High High High
SYS_RESET# Core External Circuit Driven Driven Off Off
THRMTRIP# CPU Thermal Sensor Driven Driven Off Off
WAKE# Suspend External Pull-up Driven Driven Driven Driven
Processor Interface
A20GATE Core External Microcontroller Static Static Off Off
RCIN# Core External Microcontroller High High Off Off
System Management Interface
SMBALERT# / GPIO11 Suspend External Pull-up Driven Driven Driven Driven
INTRUDER# RTC External Switch Driven Driven High High
JTAG Interface
JTAG_TDI Suspend Internal Pull-up4High High High High
JTAG_TMS Suspend Internal Pull-up4High High High High
JTAG_TCK Suspend Internal Pull-down5Low Low Low Low
Miscellaneous Signals
INTVRMEN2RTC External Pull-up High High High High
RTCRST# RTC External RC Circuit High High High High
SRTCRST# RTC External RC Circuit High High High High
Intel® High Definition Audio Interface
HDA_SDIN[3:0] Suspend Intel® High Definition
Audio Codec Driven Low Low Low
SPI Interface
SPI_MISO ME33IO Internal Pull-up Driven Driven Driven Driven
Clock Interface
CLKIN_DMI_P,
CLKIN_DMI_N Core Clock Generator Running Running Off Off
CLKIN_SATA_N/
CKSSCD_N,
CLKIN_SATA_P/
CKSSCD_P
Core Clock Generator Running Running Off Off
CLKIN_BCLK_P,
CLKIN_BCLK_N Core Clock Generator Running Running Off Off
CLKIN_DOT_96P,
CLKIN_DOT_96N Core Clock Generator Running Running Off Off
CLKIN_PCILOOPBACK Core Clock Generator Running Running Off Off
PCIECLKRQ[7:3]#/
GPIO[46:44,26:25]1,
PCIECLKRQ0#/
GPIO731
Suspend External Pull-up Driven Driven Driven Driven
Table 3-5. Power Plane for Input Signals for Mobile Configurations (Sheet 2 of 3)
Signal Name Power Well Driver During Reset C-x
states S0/S1 S3 S4/S5
Datasheet 117
PCH Pin States
NOTES:
1. These signals can be configured as outputs in GPIO mode.
2. This signal is sampled as a functional strap during Reset. See Functional straps definition
table for usage.
3. State of the pins depend on the source of VccME3_3 power.
4. Internal pull-ups are implemented .
5. Internal pull-down is implemented only.
§ §
PCIECLKRQ[2:1]#/
GPIO[20:18]1Core External Pull-up Driven Driven Off Off
PEG_A_CLKRQ#/
GPIO471,
PEG_B_CLKRQ#/
GPIO561
Suspend External Pull-up Driven Driven Driven Driven
XTAL25_IN Core Clock Generator High-Z High-Z Off Off
REFCLK14IN Core Clock Generator High-Z High-Z Off Off
CLKIN_PCILOOPBACK Core Clock Generator High-Z High-Z Off Off
Intel® Flexible Display Interface
FDI_RXP[7:0],
FDI_RXN[7:0] Core Processor Driven Driven Off Off
Digital Display Interface
DDP[B:C:D]_HPD Core External Pull-down Driven Driven Off Off
SDVO_INTP,
SDVO_INTN Core SDVO controller device Driven Driven Off Off
SDVO_TVCLKINP,
SDVO_TVCLKINN Core SDVO controller device Driven Driven Off Off
SDVO_STALLP,
SDVO_STALLN Core SDVO controller device Driven Driven Off Off
Table 3-5. Power Plane for Input Signals for Mobile Configurations (Sheet 3 of 3)
Signal Name Power Well Driver During Reset C-x
states S0/S1 S3 S4/S5
PCH Pin States
118 Datasheet
Datasheet 119
System Clocks
4System Clocks
Table 4-1 shows the system clock input to the PCH. Table 4-2 shows system clock
domains generated by the PCH in buffered mode. Figure 4-1 shows the assumed
connection of the Main Clock Generator to the PCH in buffer mode to the various
system components. For complete details of the system clocking solution, see the
system’s clock generator component specification, Clock Signals section and the PCH
Clocks.
Table 4-1. PCH System Clock Inputs
Clock Domain Frequency Usage
CLKIN_SATA_P /
CKSSCD_P,
CLKIN_SATA_N /
CKSSCD_N
100 MHz 100 MHz differential reference clock from a clock chip for
use only as a 100 MHz source for SATA clock.
CLKIN_DMI_P,
CLKIN_DMI_N 100 MHz
100 MHz differential reference clock from a clock chip used
for DMI.
NOTE: This input clock is required to be PCIe 2.0 jitter spec
compliant from a clock chip, for PCIe 2.0 discrete
Graphics platforms.
CLKIN_PCILOOPB
ACK 33 MHz
33 MHz clock feedback input to reduce skew between PCH
PCI clock and clock observed by connected PCI devices.
This signal must be connected to one of the pins in the
group CLKOUT_PCI[4:0]
REFCLK14IN 14.31818
MHz
Single-ended 14.31818 MHz reference clock driven by a
clock chip. Used for ACPI timer and Multimedia Timers.
Expected to be shut off during S3.
CLKIN_DOT96P,
CLKIN_DOT96N 96 MHz
96 MHz differential reference clock from a clock chip. Used
to generate the 48-MHz USB/SIO clocks and 24 MHz HDA
bit clock.
CLKIN_BCLK_P,
CLKIN_BCLK_N 133 MHZ 133 MHz differential reference clock from a clock chip in
Buffer-Through Mode.
System Clocks
120 Datasheet
Table 4-2. PCH System Clock Outputs
Clock Domain Frequency Usage
CLKOUT_PCI[4:0] 33 MHz
Single Ended 33.3MHz outputs to PCI connectors/
devices. One of these signals must be connected to
CLKIN_PCILOOPBACK to function as a PCI clock
loopback. This allows skew control for variable lengths
of CLKOUT_PCI[4:0]. PCI Bus, LPC I/F. These only go
to external PCI and LPC devices.
CLKOUT_PCIE[7:0]P,
CLKOUT_PCIE[7:0]N 100 MHz 100 MHz PCIe* Gen1.1 specification differential output
to PCI Express* devices
CLKOUT_PEG_A_P,
CLKOUT_PEG_A_N,
CLKOUT_PEG_B_P,
CLKOUT_PEG_B_N,
100 MHz 100 MHz PCIe* Gen2 specification differential output to
PCI Express* Graphics devices
CLKOUTFLEX0 /
GPIO64,
CLKOUTFLEX1 /
GPIO65,
CLKOUTFLEX2 /
GPIO66
33 MHz or
14.31818
MHz
33 MHz or 14.31818 MHz output
CLKOUTFLEX3 /
GPIO67
48 MHz, 33
MHz, or
14.31818
MHz
48 MHz, 33 MHz, 14.31818 MHz output
SPI_CLK 17.86 MHz/
31.25 MHz
Drive SPI devices connected to the PCH. Generated by
the PCH.
CLKOUT_BCLK0_P /
CLKOUT_PCIE8_P,
CLKOUT_BCLK0_N /
CLKOUT_PCIE8_N
133 MHz Or
100 MHz
133 MHz Differential output to Processor or 100 MHz
PCIe* Gen 1.1 specification differential output to PCI
Express* devices
CLKOUT_DP_P /
CLKOUT_BCLK1_P,
CLKOUT_DP_N /
CLKOUT_BCLK1_N
120 MHz or
133 MHz
120 MHz Differential output for DisplayPort reference or
133 MHz Differential output to Processor
Datasheet 121
System Clocks
§ §
Figure 4-1. PCH High-Level Clock Diagram
System Clocks
122 Datasheet
Datasheet 123
Functional Description
5 Functional Description
This chapter describes the functions and interfaces of the Intel® 5 Series Chipset and
Intel® 3400 Series Chipset.
5.1 DMI-to-PCI Bridge (D30:F0)
The DMI-to-PCI bridge resides in PCI Device 30, Function 0 on bus 0. This portion of
the PCH implements the buffering and control logic between PCI and Direct Media
Interface (DMI). The arbitration for the PCI bus is handled by this PCI device. The PCI
decoder in this device must decode the ranges for the DMI. All register contents are
lost when core well power is removed.
Direct Media Interface (DMI) is the chip-to-chip connection between the Processor and
the PCH. This high-speed interface integrates advanced priority-based servicing
allowing for concurrent traffic and true isochronous transfer capabilities. Base
functionality is completely software transparent permitting current and legacy software
to operate normally.
To provide for true isochronous transfers and configurable Quality of Service (QoS)
transactions, the PCH supports two virtual channels on DMI—VC0 and VC1. These two
channels provide a fixed arbitration scheme where VC1 is always the highest priority.
VC0 is the default conduit of traffic for DMI and is always enabled. VC1 must be
specifically enabled and configured at both ends of the DMI link (that is, the PCH and
processor).
Configuration registers for DMI, virtual channel support, and DMI active state power
management (ASPM) are in the RCRB space in the Chipset Config Registers
(Chapter 10.1.1).
DMI is also capable of operating in an Enterprise Southbridge Interface (ESI)
compatible mode. ESI is a chip-to-chip connection for server chipsets. In this ESI-
compatible mode, the DMI signals require AC coupling. A hardware strap is used to
configure DMI in ESI-compatible mode see Section 2.28 for details.
5.1.1 PCI Bus Interface
The PCH PCI interface supports PCI Local Bus Specification, Revision 2.3, at 33 MHz.
The PCH integrates a PCI arbiter that supports up to four external PCI bus masters in
addition to the internal PCH requests.
5.1.2 PCI Bridge As an Initiator
The bridge initiates cycles on the PCI bus when granted by the PCI arbiter. The bridge
generates the following cycle types:
Table 5-1. PCI Bridge Initiator Cycle Types
Command C/BE# Notes
I/O Read/Write 2h/3h Non-posted
Memory Read/Write 6h/7h Writes are posted
Configuration Read/Write Ah/Bh Non-posted
Special Cycles 1h Posted
Functional Description
124 Datasheet
5.1.2.1 Memory Reads and Writes
The bridge bursts memory writes on PCI that are received as a single packet from DMI.
5.1.2.2 I/O Reads and Writes
The bridge generates single DW I/O read and write cycles. When the cycle completes
on the PCI bus, the bridge generates a corresponding completion on DMI. If the cycle is
retried, the cycle is kept in the down bound queue and may be passed by a postable
cycle.
5.1.2.3 Configuration Reads and Writes
The bridge generates single DW configuration read and write cycles. When the cycle
completes on the PCI bus, the bridge generates a corresponding completion. If the
cycle is retried, the cycle is kept in the down bound queue and may be passed by a
postable cycle.
5.1.2.4 Locked Cycles
The bridge propagates locks from DMI per the PCI Local Bus Specification. The PCI
bridge implements bus lock, which means the arbiter will not grant to any agent except
DMI while locked.
If a locked read results in a target or master abort, the lock is not established (as per
the PCI Local Bus Specification). Agents north of the PCH must not forward a
subsequent locked read to the bridge if they see the first one finish with a failed
completion.
5.1.2.5 Target / Master Aborts
When a cycle initiated by the bridge is master/target aborted, the bridge will not re-
attempt the same cycle. For multiple DW cycles, the bridge increments the address and
attempts the next DW of the transaction. For all non-postable cycles, a target abort
response packet is returned for each DW that was master or target aborted on PCI. The
bridge drops posted writes that abort.
5.1.2.6 Secondary Master Latency Timer
The bridge implements a Master Latency Timer using the SMLT register which, upon
expiration, causes the de-assertion of FRAME# at the next legal clock edge when there
is another active request to use the PCI bus.
5.1.2.7 Dual Address Cycle (DAC)
The bridge will issue full 64-bit dual address cycles for device memory-mapped
registers above 4 GB.
Datasheet 125
Functional Description
5.1.2.8 Memory and I/O Decode to PCI
The PCI bridge in the PCH is a subtractive decode agent, which follows the following
rules when forwarding a cycle from DMI to the PCI interface:
The PCI bridge will positively decode any memory/IO address within its window
registers, assuming PCICMD.MSE (D30:F0:Offset 04h:bit 1) is set for memory
windows and PCICMD.IOSE (D30:F0:Offset 04h:bit 0) is set for I/O windows.
The PCI bridge will subtractively decode any 64-bit memory address not claimed
by another agent, assuming PCICMD.MSE (D30:F0:Offset 04h:bit 1) is set.
The PCI bridge will subtractively decode any 16-bit I/O address not claimed by
another agent assuming PCICMD.IOSE (D30:F0:Offset 04h:bit 0) is set.
If BCTRL.IE (D30:F0:Offset 3Eh:bit 2) is set, the PCI bridge will not positively
forward from primary to secondary called out ranges in the I/O window per PCI
Local Bus Specification (I/O transactions addressing the last 768 bytes in each, 1
KB block: offsets 100h to 3FFh). The PCI bridge will still take them subtractively
assuming the above rules.
If BCTRL.VGAE (D30:F0:Offset 3Eh:bit 3) is set, the PCI bridge will positively
forward from primary to secondary I/O and memory ranges as called out in the PCI
Bridge Specification, assuming the above rules are met.
5.1.3 Parity Error Detection and Generation
PCI parity errors can be detected and reported. The following behavioral rules apply:
When a parity error is detected on PCI, the bridge sets the SECSTS.DPE
(D30:F0:Offset 1Eh:bit 15).
If the bridge is a master and BCTRL.PERE (D30:F0:Offset 3Eh:bit 0) is set and one
of the parity errors defined below is detected on PCI, then the bridge will set
SECSTS.DPD (D30:F0:Offset 1Eh:bit 8) and will also generate an internal SERR#.
During a write cycle, the PERR# signal is active, or
A data parity error is detected while performing a read cycle
If an address or command parity error is detected on PCI and PCICMD.SEE
(D30:F0:Offset 04h:bit 8), BCTRL.PERE, and BCTRL.SEE (D30:F0:Offset 3Eh:bit 1)
are all set, the bridge will set PSTS.SSE (D30:F0:Offset 06h:bit 14) and generate
an internal SERR#.
If the PSTS.SSE is set because of an address parity error and the PCICMD.SEE is
set, the bridge will generate an internal SERR#.
When bad parity is detected from DMI, bad parity will be driven on all data from the
bridge.
When an address parity error is detected on PCI, the PCI bridge will never claim the
cycle. This is a slight deviation from the PCI bridge spec, which says that a cycle
should be claimed if BCTRL.PERE is not set. However, DMI does not have a concept
of address parity error, so claiming the cycle could result in the rest of the system
seeing a bad transaction as a good transaction.
Functional Description
126 Datasheet
5.1.4 PCIRST#
The PCIRST# pin is generated under two conditions:
•PLTRST# active
BCTRL.SBR (D30:F0:Offset 3Eh:bit 6) set to 1
The PCIRST# pin is in the suspend well. PCIRST# should be tied to PCI bus agents, but
not other agents in the system.
5.1.5 Peer Cycles
The PCI bridge may be the initiator of peer cycles. Peer cycles include memory, I/O,
and configuration cycle types. Peer cycles are only allowed through VC0, and are
enabled with the following bits:
BPC.PDE (D30:F0:Offset 4Ch:bit 2) – Memory and I/O cycles
BPC.CDE (D30:F0:Offset 4Ch:bit 1) – Configuration cycles
When enabled for peer for one of the above cycle types, the PCI bridge will perform a
peer decode to see if a peer agent can receive the cycle. When not enabled, memory
cycles (posted and/or non-posted) are sent to DMI, and I/O and/or configuration cycles
are not claimed.
Configuration cycles have special considerations. Under the PCI Local Bus Specification,
these cycles are not allowed to be forwarded upstream through a bridge. However, to
enable things such as manageability, BPC.CDE can be set. When set, type 1 cycles are
allowed into the part. The address format of the type 1 cycle is slightly different from a
standard PCI configuration cycle to allow addressing of extended PCI space. The format
is shown in Table 5 - 2 .
Note: The PCH USB controllers cannot perform peer-to-peer traffic.
Table 5-2. Type 1 Address Format
Bits Definition
31:27 Reserved (same as the PCI Local Bus Specification)
26:24 Extended Configuration Address – allows addressing of up to 4K. These bits
are combined with bits 7:2 to get the full register.
23:16 Bus Number (same as the PCI Local Bus Specification)
15:11 Device Number (same as the PCI Local Bus Specification)
10:8 Function Number (same as the PCI Local Bus Specification)
7:2 Register (same as the PCI Local Bus Specification)
10
0 Must be 1 to indicate a type 1 cycle. Type 0 cycles are not decoded.
Datasheet 127
Functional Description
5.1.6 PCI-to-PCI Bridge Model
From a software perspective, the PCH contains a PCI-to-PCI bridge. This bridge
connects DMI to the PCI bus. By using the PCI-to-PCI bridge software model, the PCH
can have its decode ranges programmed by existing plug-and-play software such that
PCI ranges do not conflict with graphics aperture ranges in the Host controller.
5.1.7 IDSEL to Device Number Mapping
When addressing devices on the external PCI bus (with the PCI slots), the PCH asserts
one address signal as an IDSEL. When accessing device 0, the PCH asserts AD16.
When accessing Device 1, the PCH asserts AD17. This mapping continues all the way
up to device 15 where the PCH asserts AD31. Note that the PCH internal functions
(Intel® High Definition Audio, USB, SATA and PCI Bridge) are enumerated like they are
off of a separate PCI bus (DMI) from the external PCI bus.
5.1.8 Standard PCI Bus Configuration Mechanism
The PCI Bus defines a slot based “configuration space” that allows each device to
contain up to eight functions with each function containing up to 256, 8-bit
configuration registers. The PCI Local Bus Specification, Revision 2.3 defines two bus
cycles to access the PCI configuration space: Configuration Read and Configuration
Write. Memory and I/O spaces are supported directly by the processor. Configuration
space is supported by a mapping mechanism implemented within the PCH. The PCI
Local Bus Specification, Revision 2.3 defines two mechanisms to access configuration
space, Mechanism 1 and Mechanism 2. The PCH only supports Mechanism 1.
Warning: Configuration writes to internal devices, when the devices are disabled, are illegal and
may cause undefined results.
5.2 PCI Express* Root Ports (D28:F0,F1,F2,F3,F4,F5,
F6, F7)
There are eight root ports available in the PCH. The root ports are compliant to the PCI
Express 2.0 specification running at 2.5 GT/s. The ports all reside in device 28, and
take function 0 – 7. Port 1 is function 0, port 2 is function 1, port 3 is function 2, port 4
is function 3, port 5 is function 4, port 6 is function 5, port 7 is function 6, and port 8 is
function 7.
Note: This section assumes the default PCI Express Function Number-to-Root Port mapping is
used. Function numbers for a given root port are assignable through the “Root Port
Function Number and Hide for PCI Express Root Ports” registers (RCBA+0404h).
PCI Express Root Ports 1-4 and Ports 5-8 can independently be configured as four x1s,
two x2s, one x2 and 2 x1s, or one x4 port widths. The port configuration is set by soft
straps in the Flash Descriptor.
Note: PCI Express port 7 and 8 are not available for the H55, HM55, and Intel 3400 chipsets.
PCIe* ports are numbered from 1–8.
Functional Description
128 Datasheet
5.2.1 Interrupt Generation
The root port generates interrupts on behalf of Hot-Plug and power management
events, when enabled. These interrupts can either be pin based, or can be MSIs, when
enabled.
When an interrupt is generated using the legacy pin, the pin is internally routed to the
PCH interrupt controllers. The pin that is driven is based upon the setting of the chipset
configuration registers. Specifically, the chipset configuration registers used are the
D28IP (Base address + 310Ch) and D28IR (Base address + 3146h) registers.
Table 5-3 summarizes interrupt behavior for MSI and wire-modes. In the table “bits”
refers to the Hot-Plug and PME interrupt bits.
5.2.2 Power Management
5.2.2.1 S3/S4/S5 Support
Software initiates the transition to S3/S4/S5 by performing an IO write to the Power
Management Control register in the PCH. After the IO write completion has been
returned to the processor, each root port will send a PME_Turn_Off TLP (Transaction
Layer Packet) message on its downstream link. The device attached to the link will
eventually respond with a PME_TO_Ack TLP message followed by sending a
PM_Enter_L23 DLLP (Data Link Layer Packet) request to enter the L2/L3 Ready state.
When all of the PCH root ports links are in the L2/L3 Ready state, the PCH power
management control logic will proceed with the entry into S3/S4/S5.
Prior to entering S3, software is required to put each device into D3HOT
. When a device
is put into D3HOT
, it will initiate entry into a L1 link state by sending a PM_Enter_L1
DLLP. Thus under normal operating conditions when the root ports sends the
PME_Turn_Off message the link will be in state L1. However, when the root port is
instructed to send the PME_Turn_Off message, it will send it whether or not the link
was in L1. Endpoints attached to PCH can make no assumptions about the state of the
link prior to receiving a PME_Turn_Off message.
Table 5-3. MSI versus PCI IRQ Actions
Interrupt Register Wire-Mode
Action MSI Action
All bits 0 Wire inactive No action
One or more bits set to 1 Wire active Send
message
One or more bits set to 1, new bit gets set to 1 Wire active Send
message
One or more bits set to 1, software clears some (but not all)
bits Wire active Send
message
One or more bits set to 1, software clears all bits Wire inactive No action
Software clears one or more bits, and one or more bits are
set on the same clock Wire active Send
message
Datasheet 129
Functional Description
5.2.2.2 Resuming from Suspended State
The root port contains enough circuitry in the suspend well to detect a wake event
through the WAKE# signal and to wake the system. When WAKE# is detected asserted,
an internal signal is sent to the power management controller of the PCH to cause the
system to wake up. This internal message is not logged in any register, nor is an
interrupt/GPE generated due to it.
5.2.2.3 Device Initiated PM_PME Message
When the system has returned to a working state from a previous low power state, a
device requesting service will send a PM_PME message continuously, until acknowledge
by the root port. The root port will take different actions depending upon whether this
is the first PM_PME has been received, or whether a previous message has been
received but not yet serviced by the operating system.
If this is the first message received (RSTS.PS - D28:F0/F1/F2/F3/F4/F5/F6/F7:Offset
60h:bit 16 is cleared), the root port will set RSTS.PS, and log the PME Requester ID
into RSTS.RID (D28:F0/F1/F2/F3/F4/F5/F6/F7:Offset 60h:bits 15:0). If an interrupt is
enabled using RCTL.PIE (D28:F0/F1/F2/F3/F4/F5/F6/F7:Offset 5Ch:bit 3), an interrupt
will be generated. This interrupt can be either a pin or an MSI if MSI is enabled using
MC.MSIE (D28:F0/F1/F2/F3/F4/F5/F6/F7:Offset 82h:bit 0). See Section 5.2.2.4 for
SMI/SCI generation.
If this is a subsequent message received (RSTS.PS is already set), the root port will set
RSTS.PP (D28:F0/F1/F2/F3/F4/F5/F6/F7:Offset 60h:bit 17) and log the PME Requester
ID from the message in a hidden register. No other action will be taken.
When the first PME event is cleared by software clearing RSTS.PS, the root port will set
RSTS.PS, clear RSTS.PP, and move the requester ID from the hidden register into
RSTS.RID.
If RCTL.PIE is set, an interrupt will be generated. If RCTL.PIE is not set, a message will
be sent to the power management controller so that a GPE can be set. If messages
have been logged (RSTS.PS is set), and RCTL.PIE is later written from a 0 to a 1, and
interrupt will be generated. This last condition handles the case where the message
was received prior to the operating system re-enabling interrupts after resuming from
a low power state.
5.2.2.4 SMI/SCI Generation
Interrupts for power management events are not supported on legacy operating
systems. To support power management on non-PCI Express aware operating systems,
PM events can be routed to generate SCI. To generate SCI, MPC.PMCE must be set.
When set, a power management event will cause SMSCS.PMCS (D28:F0/F1/F2/F3/F4/
F5/F6/F7:Offset DCh:bit 31) to be set.
Additionally, BIOS workarounds for power management can be supported by setting
MPC.PMME (D28:F0/F1/F2/F3/F4/F5/F6/F7:Offset D8h:bit 0). When this bit is set,
power management events will set SMSCS.PMMS (D28:F0/F1/F2/F3/F4/F5/F6/
F7:Offset DCh:bit 0), and SMI # will be generated. This bit will be set regardless of
whether interrupts or SCI is enabled. The SMI# may occur concurrently with an
interrupt or SCI.
Functional Description
130 Datasheet
5.2.3 SERR# Generation
SERR# may be generated using two paths – through PCI mechanisms involving bits in
the PCI header, or through PCI Express* mechanisms involving bits in the PCI Express
capability structure.
5.2.4 Hot-Plug
Each root port implements a Hot-Plug controller which performs the following:
Messages to turn on / off / blink LEDs
Presence and attention button detection
Interrupt generation
The root port only allows Hot-Plug with modules (such as, ExpressCard*). Edge-
connector based Hot-Plug is not supported.
5.2.4.1 Presence Detection
When a module is plugged in and power is supplied, the physical layer will detect the
presence of the device, and the root port sets SLSTS.PDS (D28:F0/F1/F2/F3/F4/
F5:Offset 5Ah:bit 6) and SLSTS.PDC (D28:F0/F1/F2/F3:Offset 6h:bit 3). If SLCTL.PDE
(D28:F0/F1/F2/F3/F4/F5/F6/F7:Offset 58h:bit 3) and SLCTL.HPE (D28:F0/F1/F2/F3/
F4/F5/F6/F7:Offset 58h:bit 5) are both set, the root port will also generate an
interrupt.
When a module is removed (using the physical layer detection), the root port clears
SLSTS.PDS and sets SLSTS.PDC. If SLCTL.PDE and SLCTL.HPE are both set, the root
port will also generate an interrupt.
Figure 5-1. Generation of SERR# to Platform
PSTS.SSE
SERR#
PCICMD.SEE
Secondary Parity Error
Primary Parity Error
Secondary SERR#
Correctable SERR#
Fatal SERR#
Non-Fatal SERR#
PCI
PCI Express
Datasheet 131
Functional Description
5.2.4.2 Message Generation
When system software writes to SLCTL.AIC (D28:F0/F1/F2/F3/F4/F5/F6/F7:Offset
58h:bits 7:6) or SLCTL.PIC (D28:F0/F1/F2/F3/F4/F5/F6/F7:Offset 58h:bits 9:8), the
root port will send a message down the link to change the state of LEDs on the module.
Writes to these fields are non-postable cycles, and the resulting message is a postable
cycle. When receiving one of these writes, the root port performs the following:
Changes the state in the register
Generates a completion into the upstream queue
Formulates a message for the downstream port if the field is written to regardless
of if the field changed
Generates the message on the downstream port
When the last message of a command is transmitted, sets SLSTS.CCE (D28:F0/F1/
F2/F3/F4/F5/F6/F7:Offset 58h:bit 4) to indicate the command has completed. If
SLCTL.CCE and SLCTL.HPE (D28:F0/F1/F2/F3/F4/F5/F6/F7:Offset 58h:bit 5) are
set, the root port generates an interrupt.
The command completed register (SLSTS.CC) applies only to commands issued by
software to control the Attention Indicator (SLCTL.AIC), Power Indicator (SLCTL.PIC),
or Power Controller (SLCTL.PCC). However, writes to other parts of the Slot Control
Register would invariably end up writing to the indicators, power controller fields;
Hence, any write to the Slot Control Register is considered a command and if enabled,
will result in a command complete interrupt. The only exception to this rule is a write to
disable the command complete interrupt which will not result in a command complete
interrupt.
A single write to the Slot Control register is considered to be a single command, and
hence receives a single command complete, even if the write affects more than one
field in the Slot Control Register.
5.2.4.3 Attention Button Detection
When an attached device is ejected, an attention button could be pressed by the user.
This attention button press will result in a the PCI Express message
Attention_Button_Pressed” from the device. Upon receiving this message, the root
port will set SLSTS.ABP (D28:F0/F1/F2/F3/F4/F5/F6/F7:Offset 5Ah:bit 0).
If SLCTL.ABE (D28:F0/F1/F2/F3/F4/F5:Offset 58h:bit 0) and SLCTL.HPE (D28:F0/F1/
F2/F3/F4/F5/F6/F7:Offset 58h:bit 5) are set, the Hot-Plug controller will also generate
an interrupt. The interrupt is generated on an edge-event. For example, if SLSTS.ABP is
already set, a new interrupt will not be generated.
Functional Description
132 Datasheet
5.2.4.4 SMI/SCI Generation
Interrupts for Hot-Plug events are not supported on legacy operating systems. To
support Hot-Plug on non-PCI Express aware operating systems, Hot-Plug events can be
routed to generate SCI. To generate SCI, MPC.HPCE (D28:F0/F1/F2/F3/F4/F5/F6/
F7:Offset D8h:bit 30) must be set. When set, enabled Hot-Plug events will cause
SMSCS.HPCS (D28:F0/F1/F2/F3/F4/F5/F6/F7:Offset DCh:bit 30) to be set.
Additionally, BIOS workarounds for Hot-Plug can be supported by setting MPC.HPME
(D28:F0/F1/F2/F3/F4/F5/F6/F7:Offset D8h:bit 1). When this bit is set, Hot-Plug events
can cause SMI status bits in SMSCS to be set. Supported Hot-Plug events and their
corresponding SMSCS bit are:
Command Completed – SCSCS.HPCCM (D28:F0/F1/F2/F3/F4/F5/F6/F7:Offset
DCh:bit 3)
Presence Detect Changed – SMSCS.HPPDM (D28:F0/F1/F2/F3/F4/F5/F6/F7:Offset
DCh:bit 1)
Attention Button Pressed – SMSCS.HPABM (D28:F0/F1/F2/F3/F4/F5/F6/F7:Offset
DCh:bit 2)
Link Active State Changed – SMSCS.HPLAS (D28:F0/F1/F2/F3/F4/F5/F6/F7:Offset
DCh:bit 4)
When any of these bits are set, SMI# will be generated. These bits are set regardless of
whether interrupts or SCI are enabled for Hot-Plug events. The SMI# may occur
concurrently with an interrupt or SCI.
5.3 Gigabit Ethernet Controller (B0:D25:F0)
The PCH chipset integrates a Gigabit Ethernet (GbE) controller. The integrated GbE
controller is compatible with the Intel® 82577/82578 Platform LAN Connect device. The
integrated GbE controller provides two interfaces for 10/100/1000 Mb/s and
manageability operation:
Based on PCI Express*—A high-speed SerDes interface using PCI Express electrical
signaling at half speed while keeping the custom logical protocol for active state
operation mode.
System Management Bus (SMBus)—A very low speed connection for low power
state mode for manageability communication only. At this low power state mode
the Ethernet link speed is reduced to 10 Mb/s.
The 82577/82578 can be connected to any available PCI Express port in the PCH
chipset. The 82577/82578 only runs at a speed of 1250 Mb/s, which is 1/2 of the gen1
2.5 Gb/s PCI Express frequency. Each of the PCI Express root ports in the PCH chipset
have the ability to run at the 1250 Mb/s rate. There is no need to implement a
mechanism to detect that the 82577/82578 is connected. The port configuration (if
any), attached to the 82577/82578, is pre-loaded from the NVM. The selected port
adjusts the transmitter to run at the 1250 Mb/s rate and does not need to be PCI
Express compliant.
Note: PCIe validation tools cannot be used for electrical validation of this interface; however,
PCIe layout rules apply for on-board routing.
The integrated GbE controller operates at full-duplex at all supported speeds or half-
duplex at 10/100 Mb/s. It also adheres to the IEEE 802.3x Flow Control Specification.
Note: GbE operation (1000 Mb/s) is only supported in S0 mode. In Sx modes, SMBus is the
only active bus and is used to support manageability/remote wake-up functionality.
Datasheet 133
Functional Description
The integrated GbE controller provides a system interface using a PCI Express function.
A full memory-mapped or I/O-mapped interface is provided to the software, along with
DMA mechanisms for high performance data transfer.
The integrated GbE controller features are:
•Network Features
Compliant with the 1 Gb/s Ethernet 802.3 802.3u 802.3ab specifications
Multi-speed operation: 10/100/1000 Mb/s
Full-duplex operation at 10/100/1000Mb/s: Half-duplex at 10/100 Mb/s
Flow control support compliant with the 802.3X specification
VLAN support compliant with the 802.3q specification
MAC address filters: perfect match unicast filters; multicast hash filtering,
broadcast filter and promiscuous mode
PCI Express/SMBus interface to GbE PHYs
Host Interface Features
64-bit address master support for systems using more than 4 GB of physical
memory
Programmable host memory receive buffers (256 Bytes to 16 KB)
Intelligent interrupt generation features to enhance driver performance
Descriptor ring management hardware for transmit and receive
Software controlled reset (resets everything except the configuration space)
Message Signaled Interrupts
Performance Features
Configurable receive and transmit data FIFO, programmable in 1 KB increments
TCP segmentation capability compatible with NT 5.x off loading features
Fragmented UDP checksum offload for packet reassembly
IPv4 and IPv6 checksum offload support (receive, transmit, and TCP
segmentation offload)
Split header support to eliminate payload copy from user space to host space
Receive Side Scaling (RSS) with two hardware receive queues
Supports 9018 bytes of jumbo packets
—Packet buffer size
LinkSec offload compliant with 802.3ae specification
TimeSync offload compliant with 802.1as specification
Virtualization Technology Features
Warm function reset – function level reset (FLR)
—VMDq1
Power Management Features
Magic Packet* wake-up enable with unique MAC address
ACPI register set and power down functionality supporting D0 and D3 states
Full wake up support (APM, ACPI)
MAC power down at Sx, DMoff with and without WoL
Functional Description
134 Datasheet
5.3.1 GbE PCI Express* Bus Interface
The GbE controller has a PCI Express interface to the host processor and host memory.
The following sections detail the bus transactions.
5.3.1.1 Transaction Layer
The upper layer of the host architecture is the transaction layer. The transaction layer
connects to the device core using an implementation specific protocol. Through this
core-to-transaction-layer protocol, the application-specific parts of the device interact
with the subsystem and transmit and receive requests to or from the remote agent,
respectively.
5.3.1.2 Data Alignment
5.3.1.2.1 4 KB Boundary
PCI requests must never specify an address/length combination that causes a memory
space access to cross a 4 KB boundary. It is hardware’s responsibility to break requests
into 4 KB-aligned requests (if needed). This does not pose any requirement on
software. However, if software allocates a buffer across a 4 KB boundary, hardware
issues multiple requests for the buffer. Software should consider aligning buffers to a
4 KB boundary in cases where it improves performance.
The alignment to the 4 KB boundaries is done in the core. The transaction layer does
not do any alignment according to these boundaries.
5.3.1.2.2 64 Bytes
PCI requests are multiples of 64 bytes and aligned to make better use of memory
controller resources. Writes, however, can be on any boundary and can cross a 64-byte
alignment boundary.
5.3.1.3 Configuration Request Retry Status
The integrated GbE controller might have a delay in initialization due to an NVM read. If
the NVM configuration read operation is not completed and the device receives a
configuration request, the device responds with a configuration request retry
completion status to terminate the request, and thus effectively stalls the configuration
request until such time that the sub-system has completed local initialization and is
ready to communicate with the host.
Datasheet 135
Functional Description
5.3.2 Error Events and Error Reporting
5.3.2.1 Data Parity Error
The PCI host bus does not provide parity protection, but it does forward parity errors
from bridges. The integrated GbE controller recognizes parity errors through the
internal bus interface and sets the Parity Error bit in PCI configuration space. If parity
errors are enabled in configuration space, a system error is indicated on the PCI host
bus. The offending cycle with a parity error is dropped and not processed by the
integrated GbE controller.
5.3.2.2 Completion with Unsuccessful Completion Status
A completion with unsuccessful completion status (any status other than 000) is
dropped and not processed by the integrated GbE controller. Furthermore, the request
that corresponds to the unsuccessful completion is not retried. When this unsuccessful
completion status is received, the System Error bit in the PCI configuration space is set.
If the system errors are enabled in configuration space, a system error is indicated on
the PCI host bus.
5.3.3 Ethernet Interface
The integrated GbE controller provides a complete CSMA/CD function supporting IEEE
802.3 (10 Mb/s), 802.3u (100 Mb/s) implementations. It also supports the IEEE 802.3z
and 802.3ab (1000 Mb/s) implementations. The device performs all of the functions
required for transmission, reception, and collision handling called out in the standards.
The mode used to communicate between the PCH and the 82577/82578 PHY supports
10/100/1000 Mb/s operation, with both half- and full-duplex operation at 10/100 Mb/s,
and full-duplex operation at 1000 Mb/s.
5.3.3.1 Intel® 5 Series Chipset and Intel® 3400 Series Chipset
82577/82578 PHY Interface
The integrated GbE controller and the 82577/82578 PHY communicate through the
PCIe and SMBus interfaces. All integrated GbE controller configuration is performed
using device control registers mapped into system memory or I/O space. The 82577/
82578 is configured using the PCI Express or SMBus interface.
The integrated GbE controller supports various modes as listed in Table 5-4.
Table 5-4. LAN Mode Support
Mode System State Interface Active Connections
Normal 10/100/1000 Mb/s S0 PCI Express or
SMBus1
NOTES:
1. GbE operation is not supported in Sx states.
82577/82578
Manageability and Remote Wake-up Sx SMBus 82577/82578
Functional Description
136 Datasheet
5.3.4 PCI Power Management
The integrated GbE controller supports the Advanced Configuration and Power Interface
(ACPI) specification as well as Advanced Power Management (APM). This enables the
network-related activity (using an internal host wake signal) to wake up the host. For
example, from Sx (S3-S5) to S0.
The integrated GbE controller contains power management registers for PCI and
supports D0 and D3 states. PCIe transactions are only allowed in the D0 state, except
for host accesses to the integrated GbE controller’s PCI configuration registers.
5.3.4.1 Wake Up
The integrated GbE controller supports two types of wake-up mechanisms:
1. Advanced Power Management (APM) Wake Up
2. ACPI Power Management Wake Up
Both mechanisms use an internal logic signal to wake the system up. The wake-up
steps are as follows:
1. Host wake event occurs (note that packet is not delivered to host).
2. The 82577/82578 receives a WoL packet/link status change.
3. The 82577/82578 wakes up the integrated GbE controller using an SMBus
message.
4. The integrated GbE controller sets the PME_STATUS bit.
5. System wakes from Sx state to S0 state.
6. The host LAN function is transitioned to D0.
7. The host clears the PME_STATUS bit.
5.3.4.1.1 Advanced Power Management Wake Up
Advanced Power Management Wake Up or APM Wake Up was previously known as
Wake on LAN (WoL). It is a feature that has existed in the 10/100 Mb/s NICs for several
generations. The basic premise is to receive a broadcast or unicast packet with an
explicit data pattern and then to assert a signal to wake up the system. In earlier
generations, this was accomplished by using a special signal that ran across a cable to
a defined connector on the motherboard. The NIC would assert the signal for
approximately 50 ms to signal a wake up. The integrated GbE controller uses (if
configured to) an in-band PM_PME message for this.
At power up, the integrated GbE controller reads the APM Enable bits from the NVM PCI
Init Control Word into the APM Enable (APME) bits of the Wake Up Control (WUC)
register. These bits control enabling of APM wake up.
When APM wake up is enabled, the integrated GbE controller checks all incoming
packets for Magic Packets*.
Once the integrated GbE controller receives a matching Magic Packet*, it:
Sets the Magic Packet* Received bit in the Wake Up Status (WUS) register.
Sets the PME_Status bit in the Power Management Control/Status Register
(PMCSR).
APM wake up is supported in all power states and only disabled if a subsequent NVM
read results in the APM Wake Up bit being cleared or the software explicitly writes a 0b
to the APM Wake Up (APM) bit of the WUC register.
Datasheet 137
Functional Description
Note: APM wake up settings will be restored to NVM default by the PCH when LAN connected
Device (PHY) power is turned off and subsequently restored. Some example host WOL
flows are:
1. When system transitions to G3 after WOL is disabled from the BIOS, APM host WOL
would get enabled.
2. Anytime power to the LAN Connected Device (PHY) is cycled while in S4/S5 after
WOL is disabled from the BIOS, APM host WOL would get enabled. Anytime power
to the LAN Connected Device (PHY) is cycled while in S3, APM host WOL
configuration is lost.
5.3.4.1.2 ACPI Power Management Wake Up
The integrated GbE controller supports ACPI Power Management based Wake ups. It
can generate system wake-up events from three sources:
Receiving a Magic Packet*.
Receiving a Network Wake Up Packet.
Detecting a link change of state.
Activating ACPI Power Management Wakeup requires the following steps:
The software device driver programs the Wake Up Filter Control (WUFC) register to
indicate the packets it needs to wake up from and supplies the necessary data to
the IPv4 Address Table (IP4AT) and the Flexible Filter Mask Table (FFMT), Flexible
Filter Length Table (FFLT), and the Flexible Filter Value Table (FFVT). It can also set
the Link Status Change Wake Up Enable (LNKC) bit in the Wake Up Filter Control
(WUFC) register to cause wake up when the link changes state.
The operating system (at configuration time) writes a 1b to the PME_EN bit of the
Power Management Control/Status Register (PMCSR.8).
Normally, after enabling wake up, the operating system writes a 11b to the lower two
bits of the PMCSR to put the integrated GbE controller into low-power mode.
Once wake up is enabled, the integrated GbE controller monitors incoming packets,
first filtering them according to its standard address filtering method, then filtering
them with all of the enabled wake-up filters. If a packet passes both the standard
address filtering and at least one of the enabled wake-up filters, the integrated GbE
controller:
Sets the PME_Status bit in the PMCSR
Sets one or more of the Received bits in the Wake Up Status (WUS) register. (More
than one bit is set if a packet matches more than one filter.)
If enabled, a link state change wake up causes similar results, setting the Link Status
Changed (LNKC) bit in the Wake Up Status (WUS) register when the link goes up or
down.
After receiving a wake-up packet, the integrated GbE controller ignores any subsequent
wake-up packets until the software device driver clears all of the Received bits in the
Wake Up Status (WUS) register. It also ignores link change events until the software
device driver clears the Link Status Changed (LNKC) bit in the Wake Up Status (WUS)
register.
Note: ACPI wake up settings are not preserved when the LAN Connected Device (PHY) power
is turned off and subsequently restored. Some example host WOL flows are:
1. Anytime power to the LAN Connected Device (PHY) is cycled while in S3 or S4,
ACPI host WOL configuration is lost.
Functional Description
138 Datasheet
5.3.5 Configurable LEDs
The integrated GbE controller supports three controllable and configurable LEDs that
are driven from the 82577/82578. Each of the three LED outputs can be individually
configured to select the particular event, state, or activity, which is indicated on that
output. In addition, each LED can be individually configured for output polarity as well
as for blinking versus non-blinking (steady-state) indication.
The configuration for LED outputs is specified using the LEDCTL register. Furthermore,
the hardware-default configuration for all the LED outputs, can be specified using NVM
fields, thereby supporting LED displays configurable to a particular OEM preference.
Each of the three LEDs might be configured to use one of a variety of sources for output
indication. The MODE bits control the LED source:
LINK_100/1000 is asserted when link is established at either 100 or 1000 Mb/s.
LINK_10/1000 is asserted when link is established at either 10 or 1000 Mb/s.
LINK_UP is asserted when any speed link is established and maintained.
ACTIVITY is asserted when link is established and packets are being transmitted or
received.
LINK/ACTIVITY is asserted when link is established AND there is NO transmit or
receive activity
LINK_10 is asserted when a 10 Mb/ps link is established and maintained.
LINK_100 is asserted when a 100 Mb/s link is established and maintained.
LINK_1000 is asserted when a 1000 Mb/s link is established and maintained.
FULL_DUPLEX is asserted when the link is configured for full duplex operation.
COLLISION is asserted when a collision is observed.
PAUSED is asserted when the device's transmitter is flow controlled.
LED_ON is always asserted; LED_OFF is always de-asserted.
The IVRT bits enable the LED source to be inverted before being output or observed by
the blink-control logic. LED outputs are assumed to normally be connected to the
negative side (cathode) of an external LED.
The BLINK bits control whether the LED should be blinked while the LED source is
asserted, and the blinking frequency (either 200 ms on and 200 ms off or 83 ms on and
83 ms off). The blink control can be especially useful for ensuring that certain events,
such as ACTIVITY indication, cause LED transitions, which are sufficiently visible to a
human eye. The same blinking rate is shared by all LEDs.
5.3.6 Function Level Reset Support (FLR)
The integrated GbE controller supports FLR capability. FLR capability can be used in
conjunction with Intel® Virtualization Technology. FLR allows an operating system in a
Virtual Machine to have complete control over a device, including its initialization,
without interfering with the rest of the platform. The device provides a software
interface that enables the operating system to reset the entire device as if a PCI reset
was asserted.
Datasheet 139
Functional Description
5.3.6.1 FLR Steps
5.3.6.1.1 FLR Initialization
1. FLR is initiated by software by writing a 1b to the Initiate FLR bit.
2. All subsequent requests targeting the function is not claimed and will be master
abort immediate on the bus. This includes any configuration, I/O or memory cycles,
however, the function must continue to accept completions targeting the function.
5.3.6.1.2 FLR Operation
Function resets all configuration, I/O and memory registers of the function except
those indicated otherwise and resets all internal states of the function to the default or
initial condition.
5.3.6.1.3 FLR Completion
The Initiate FLR bit is reset (cleared) when the FLR reset completes. This bit can be
used to indicate to the software that the FLR reset completed.
Note: From the time the Initiate FLR bit is written to 1b, software must wait at least 100 ms
before accessing the function.
5.4 LPC Bridge (with System and Management
Functions) (D31:F0)
The LPC bridge function of the PCH resides in PCI Device 31:Function 0. In addition to
the LPC bridge function, D31:F0 contains other functional units including DMA,
Interrupt controllers, Timers, Power Management, System Management, GPIO, and
RTC. In this chapter, registers and functions associated with other functional units
(power management, GPIO, USB, etc.) are described in their respective sections.
Note: The LPC bridge cannot be configured as a subtractive decode agent.
5.4.1 LPC Interface
The PCH implements an LPC interface as described in the Low Pin Count Interface
Specification, Revision 1.1. The LPC interface to the PCH is shown in Figure 5-2. Note
that the PCH implements all of the signals that are shown as optional, but peripherals
are not required to do so.
Functional Description
140 Datasheet
5.4.1.1 LPC Cycle Types
The PCH implements all of the cycle types described in the Low Pin Count Interface
Specification, Revision 1.1. Table 5-5 shows the cycle types supported by the PCH.
NOTES:
1. The PCH provides a single generic memory range (LGMR) for decoding memory cycles and
forwarding them as LPC Memory cycles on the LPC bus. The LGMR memory decode range
is 64 KB in size and can be defined as being anywhere in the 4 GB memory space. This
range needs to be configured by BIOS during POST to provide the necessary memory
resources. BIOS should advertise the LPC Generic Memory Range as Reserved to the OS to
avoid resource conflict. For larger transfers, the PCH performs multiple 8-bit transfers. If
the cycle is not claimed by any peripheral, it is subsequently aborted, and the PCH returns
a value of all 1s to the processor. This is done to maintain compatibility with ISA memory
cycles where pull-up resistors would keep the bus high if no device responds.
2. Bus Master Read or Write cycles must be naturally aligned. For example, a 1-byte transfer
can be to any address. However, the 2-byte transfer must be word-aligned (that is, with an
address where A0=0). A DWord transfer must be DWord-aligned (that is, with an address
where A1 and A0 are both 0).
Figure 5-2. LPC Interface Diagram
PCH
LPC Device
PCI Bus
PCI
CLK
PCI
RST#
PCI
SERIRQ
PCI
PME#
LAD [3:0]
LFRAME#
LPCPD#
(Optional)
SUS_STAT#
LDRQ[1:0]#
(Optional)
LSMI#
(Optional)
GPI
Table 5-5. LPC Cycle Types Supported
Cycle Type Comment
Memory Read 1 byte only. (See Note 1 below)
Memory Write 1 byte only. (See Note 1 below)
I/O Read 1 byte only. The PCH breaks up 16- and 32-bit processor cycles into
multiple 8-bit transfers.
I/O Write 1 byte only. The PCH breaks up 16- and 32-bit processor cycles into
multiple 8-bit transfers.
DMA Read Can be 1, or 2 bytes
DMA Write Can be 1, or 2 bytes
Bus Master Read Can be 1, 2, or 4 bytes. (See Note 2 below)
Bus Master Write Can be 1, 2, or 4 bytes. (See Note 2 below)
Datasheet 141
Functional Description
5.4.1.2 Start Field Definition
NOTE: All other encodings are RESERVED.
5.4.1.3 Cycle Type / Direction (CYCTYPE + DIR)
The PCH always drives bit 0 of this field to 0. Peripherals running bus master cycles
must also drive bit 0 to 0. Table 5-7 shows the valid bit encodings.
5.4.1.4 Size
Bits[3:2] are reserved. The PCH always drives them to 00. Peripherals running bus
master cycles are also supposed to drive 00 for bits 3:2; however, the PCH ignores
those bits. Bits[1:0] are encoded as listed in Table 5-8.
Table 5-6. Start Field Bit Definitions
Bits[3:0]
Encoding Definition
0000 Start of cycle for a generic target
0010 Grant for bus master 0
0011 Grant for bus master 1
1111 Stop/Abort: End of a cycle for a
target.
Table 5-7. Cycle Type Bit Definitions
Bits[3:2] Bit1 Definition
00 0 I/O Read
00 1 I/O Write
01 0 Memory Read
01 1 Memory Read
10 0 DMA Read
10 1 DMA Write
11 x Reserved. If a peripheral performing a bus master cycle generates this
value, the PCH aborts the cycle.
Table 5-8. Transfer Size Bit Definition
Bits[1:0] Size
00 8-bit transfer (1 byte)
01 16-bit transfer (2 bytes)
10 Reserved. The PCH never drives this combination. If a peripheral running a bus
master cycle drives this combination, the PCH may abort the transfer.
11 32-bit transfer (4 bytes)
Functional Description
142 Datasheet
5.4.1.5 SYNC
Valid values for the SYNC field are shown in Table 5-9.
NOTES:
1. All other combinations are RESERVED.
2. If the LPC controller receives any SYNC returned from the device other than short (0101),
long wait (0110), or ready (0000) when running a FWH cycle, indeterminate results may
occur. A FWH device is not allowed to assert an Error SYNC.
5.4.1.6 SYNC Time-Out
There are several error cases that can occur on the LPC interface. The PCH responds as
defined in section 4.2.1.9 of the Low Pin Count Interface Specification, Revision 1.1 to
the stimuli described therein. There may be other peripheral failure conditions;
however, these are not handled by the PCH.
5.4.1.7 SYNC Error Indication
The PCH responds as defined in section 4.2.1.10 of the Low Pin Count Interface
Specification, Revision 1.1.
Upon recognizing the SYNC field indicating an error, the PCH treats this as a SERR by
reporting this into the Device 31 Error Reporting Logic.
5.4.1.8 LFRAME# Usage
The PCH follows the usage of LFRAME# as defined in the Low Pin Count Interface
Specification, Revision 1.1.
The PCH performs an abort for the following cases (possible failure cases):
The PCH starts a Memory, I/O, or DMA cycle, but no device drives a valid SYNC
after four consecutive clocks.
The PCH starts a Memory, I/O, or DMA cycle, and the peripheral drives an invalid
SYNC pattern.
A peripheral drives an illegal address when performing bus master cycles.
A peripheral drives an invalid value.
Table 5-9. SYNC Bit Definition
Bits[3:0] Indication
0000 Ready: SYNC achieved with no error. For DMA transfers, this also indicates DMA
request de-assertion and no more transfers desired for that channel.
0101
Short Wait: Part indicating wait-states. For bus master cycles, the PCH does not
use this encoding. Instead, the PCH uses the Long Wait encoding (see next encoding
below).
0110
Long Wait: Part indicating wait-states, and many wait-states will be added. This
encoding driven by the PCH for bus master cycles, rather than the Short Wait
(0101).
1001
Ready More (Used only by peripheral for DMA cycle): SYNC achieved with no
error and more DMA transfers desired to continue after this transfer. This value is
valid only on DMA transfers and is not allowed for any other type of cycle.
1010
Error: Sync achieved with error. This is generally used to replace the SERR# or
IOCHK# signal on the PCI/ISA bus. It indicates that the data is to be transferred,
but there is a serious error in this transfer. For DMA transfers, this not only indicates
an error, but also indicates DMA request de-assertion and no more transfers desired
for that channel.
Datasheet 143
Functional Description
5.4.1.9 I/O Cycles
For I/O cycles targeting registers specified in the PCH decode ranges, the PCH performs
I/O cycles as defined in the Low Pin Count Interface Specification, Revision 1.1. These
are 8-bit transfers. If the processor attempts a 16-bit or 32-bit transfer, the PCH breaks
the cycle up into multiple 8-bit transfers to consecutive I/O addresses.
Note: If the cycle is not claimed by any peripheral (and subsequently aborted), the PCH
returns a value of all 1s (FFh) to the processor. This is to maintain compatibility with
ISA I/O cycles where pull-up resistors would keep the bus high if no device responds.
5.4.1.10 Bus Master Cycles
The PCH supports Bus Master cycles and requests (using LDRQ#) as defined in the Low
Pin Count Interface Specification, Revision 1.1. The PCH has two LDRQ# inputs, and
thus supports two separate bus master devices. It uses the associated START fields for
Bus Master 0 (0010b) or Bus Master 1 (0011b).
Note: The PCH does not support LPC Bus Masters performing I/O cycles. LPC Bus Masters
should only perform memory read or memory write cycles.
5.4.1.11 LPC Power Management
LPCPD# Protocol
Same timings as for SUS_STAT#. Upon driving SUS_STAT# low, LPC peripherals drive
LDRQ# low or tri-state it. The PCH shuts off the LDRQ# input buffers. After driving
SUS_STAT# active, the PCH drives LFRAME# low, and tri-states (or drive low)
LAD[3:0].
Note: The Low Pin Count Interface Specification, Revision 1.1 defines the LPCPD# protocol
where there is at least 30 µs from LPCPD# assertion to LRST# assertion. This
specification explicitly states that this protocol only applies to entry/exit of low power
states which does not include asynchronous reset events. The PCH asserts both
SUS_STAT# (connects to LPCPD#) and PLTRST# (connects to LRST#) at the same time
during a global reset. This is not inconsistent with the LPC LPCPD# protocol.
5.4.1.12 Configuration and PCH Implications
LPC I/F Decoders
To allow the I/O cycles and memory mapped cycles to go to the LPC interface, the PCH
includes several decoders. During configuration, the PCH must be programmed with the
same decode ranges as the peripheral. The decoders are programmed using the Device
31:Function 0 configuration space.
Note: The PCH cannot accept PCI write cycles from PCI-to-PCI bridges or devices with similar
characteristics (specifically those with a “Retry Read” feature which is enabled) to an
LPC device if there is an outstanding LPC read cycle towards the same PCI device or
bridge. These cycles are not part of normal system operation, but may be encountered
as part of platform validation testing using custom test fixtures.
Bus Master Device Mapping and START Fields
Bus Masters must have a unique START field. In the case of the PCH that supports two
LPC bus masters, it drives 0010 for the START field for grants to bus master 0
(requested using LDRQ0#) and 0011 for grants to bus master #1 (requested using
LDRQ1#.). Thus, no registers are needed to configure the START fields for a particular
bus master.
Functional Description
144 Datasheet
5.5 DMA Operation (D31:F0)
The PCH supports LPC DMA using the PCH’s DMA controller. The DMA controller has
registers that are fixed in the lower 64 KB of I/O space. The DMA controller is
configured using registers in the PCI configuration space. These registers allow
configuration of the channels for use by LPC DMA.
The DMA circuitry incorporates the functionality of two 8237 DMA controllers with
seven independently programmable channels (Figure 5-3). DMA controller 1 (DMA-1)
corresponds to DMA channels 0–3 and DMA controller 2 (DMA-2) corresponds to
channels 5–7. DMA channel 4 is used to cascade the two controllers and defaults to
cascade mode in the DMA Channel Mode (DCM) Register. Channel 4 is not available for
any other purpose. In addition to accepting requests from DMA slaves, the DMA
controller also responds to requests that software initiates. Software may initiate a
DMA service request by setting any bit in the DMA Channel Request Register to a 1.
Each DMA channel is hardwired to the compatible settings for DMA device size:
channels [3:0] are hardwired to 8-bit, count-by-bytes transfers, and channels [7:5] are
hardwired to 16-bit, count-by-words (address shifted) transfers.
The PCH provides 24-bit addressing in compliance with the ISA-Compatible
specification. Each channel includes a 16-bit ISA-Compatible Current Register which
holds the 16 least-significant bits of the 24-bit address, an ISA-Compatible Page
Register which contains the eight next most significant bits of address.
The DMA controller also features refresh address generation, and auto-initialization
following a DMA termination.
5.5.1 Channel Priority
For priority resolution, the DMA consists of two logical channel groups: channels 0–3
and channels 4–7. Each group may be in either fixed or rotate mode, as determined by
the DMA Command Register.
DMA I/O slaves normally assert their DREQ line to arbitrate for DMA service. However,
a software request for DMA service can be presented through each channel's DMA
Request Register. A software request is subject to the same prioritization as any
hardware request. See the detailed register description for Request Register
programming information in Section 13.2.
5.5.1.1 Fixed Priority
The initial fixed priority structure is as follows:
The fixed priority ordering is 0, 1, 2, 3, 5, 6, and 7. In this scheme, channel 0 has the
highest priority, and channel 7 has the lowest priority. Channels [3:0] of DMA-1 assume
the priority position of channel 4 in DMA-2, thus taking priority over channels 5, 6,
and 7.
Figure 5-3. PCH DMA Controller
High priority Low priority
0, 1, 2, 3 5, 6, 7
Datasheet 145
Functional Description
5.5.1.2 Rotating Priority
Rotation allows for “fairness” in priority resolution. The priority chain rotates so that the
last channel serviced is assigned the lowest priority in the channel group (0–3, 5–7).
Channels 0–3 rotate as a group of 4. They are always placed between channel 5 and
channel 7 in the priority list.
Channel 5–7 rotate as part of a group of 4. That is, channels (5–7) form the first three
positions in the rotation, while channel group (0–3) comprises the fourth position in the
arbitration.
5.5.2 Address Compatibility Mode
When the DMA is operating, the addresses do not increment or decrement through the
High and Low Page Registers. Therefore, if a 24-bit address is 01FFFFh and increments,
the next address is 010000h, not 020000h. Similarly, if a 24-bit address is 020000h
and decrements, the next address is 02FFFFh, not 01FFFFh. However, when the DMA is
operating in 16-bit mode, the addresses still do not increment or decrement through
the High and Low Page Registers but the page boundary is now 128 K. Therefore, if a
24-bit address is 01FFFEh and increments, the next address is 000000h, not
0100000h. Similarly, if a 24-bit address is 020000h and decrements, the next address
is 03FFFEh, not 02FFFEh. This is compatible with the 8237 and Page Register
implementation used in the PC-AT. This mode is set after CPURST is valid.
5.5.3 Summary of DMA Transfer Sizes
Table 5-10 lists each of the DMA device transfer sizes. The column labeled “Current
Byte/Word Count Register” indicates that the register contents represents either the
number of bytes to transfer or the number of 16-bit words to transfer. The column
labeled “Current Address Increment/Decrement” indicates the number added to or
taken from the Current Address register after each DMA transfer cycle. The DMA
Channel Mode Register determines if the Current Address Register will be incremented
or decremented.
5.5.3.1 Address Shifting When Programmed for 16-Bit I/O Count
by Words
The PCH maintains compatibility with the implementation of the DMA in the PC AT that
used the 8237. The DMA shifts the addresses for transfers to/from a 16-bit device
count-by-words.
Note: The least significant bit of the Low Page Register is dropped in 16-bit shifted mode.
When programming the Current Address Register (when the DMA channel is in this
mode), the Current Address must be programmed to an even address with the address
value shifted right by one bit.
Table 5-10. DMA Transfer Size
DMA Device Date Size And Word Count Current Byte/Word
Count Register
Current Address
Increment/
Decrement
8-Bit I/O, Count By Bytes Bytes 1
16-Bit I/O, Count By Words (Address
Shifted) Words 1
Functional Description
146 Datasheet
The address shifting is shown in Table 5-11.
NOTE: The least significant bit of the Page Register is dropped in 16-bit shifted mode.
5.5.4 Autoinitialize
By programming a bit in the DMA Channel Mode Register, a channel may be set up as
an autoinitialize channel. When a channel undergoes autoinitialization, the original
values of the Current Page, Current Address and Current Byte/Word Count Registers
are automatically restored from the Base Page, Address, and Byte/Word Count
Registers of that channel following TC. The Base Registers are loaded simultaneously
with the Current Registers by the microprocessor when the DMA channel is
programmed and remain unchanged throughout the DMA service. The mask bit is not
set when the channel is in autoinitialize. Following autoinitialize, the channel is ready to
perform another DMA service, without processor intervention, as soon as a valid DREQ
is detected.
5.5.5 Software Commands
There are three additional special software commands that the DMA controller can
execute. The three software commands are:
Clear Byte Pointer Flip-Flop
•Master Clear
Clear Mask Register
They do not depend on any specific bit pattern on the data bus.
Table 5-11. Address Shifting in 16-Bit I/O DMA Transfers
Output
Address
8-Bit I/O Programmed
Address (Ch 0–3)
16-Bit I/O Programmed
Address (Ch 5–7)
(Shifted)
A0
A[16:1]
A[23:17]
A0
A[16:1]
A[23:17]
0
A[15:0]
A[23:17]
Datasheet 147
Functional Description
5.6 LPC DMA
DMA on LPC is handled through the use of the LDRQ# lines from peripherals and
special encodings on LAD[3:0] from the host. Single, Demand, Verify, and Increment
modes are supported on the LPC interface. Channels 0–3 are 8 bit channels. Channels
5–7 are 16-bit channels. Channel 4 is reserved as a generic bus master request.
5.6.1 Asserting DMA Requests
Peripherals that need DMA service encode their requested channel number on the
LDRQ# signal. To simplify the protocol, each peripheral on the LPC I/F has its own
dedicated LDRQ# signal (they may not be shared between two separate peripherals).
The PCH has two LDRQ# inputs, allowing at least two devices to support DMA or bus
mastering.
LDRQ# is synchronous with LCLK (PCI clock). As shown in Figure 5-4, the peripheral
uses the following serial encoding sequence:
Peripheral starts the sequence by asserting LDRQ# low (start bit). LDRQ# is high
during idle conditions.
The next three bits contain the encoded DMA channel number (MSB first).
The next bit (ACT) indicates whether the request for the indicated DMA channel is
active or inactive. The ACT bit is 1 (high) to indicate if it is active and 0 (low) if it is
inactive. The case where ACT is low is rare, and is only used to indicate that a
previous request for that channel is being abandoned.
After the active/inactive indication, the LDRQ# signal must go high for at least 1
clock. After that one clock, LDRQ# signal can be brought low to the next encoding
sequence.
If another DMA channel also needs to request a transfer, another sequence can be sent
on LDRQ#. For example, if an encoded request is sent for channel 2, and then channel
3 needs a transfer before the cycle for channel 2 is run on the interface, the peripheral
can send the encoded request for channel 3. This allows multiple DMA agents behind an
I/O device to request use of the LPC interface, and the I/O device does not need to self-
arbitrate before sending the message.
Figure 5-4. DMA Request Assertion through LDRQ#
Start MSB LSB ACT Start
LCLK
LDRQ#
Functional Description
148 Datasheet
5.6.2 Abandoning DMA Requests
DMA Requests can be de-asserted in two fashions: on error conditions by sending an
LDRQ# message with the ‘ACT’ bit set to 0, or normally through a SYNC field during the
DMA transfer. This section describes boundary conditions where the DMA request needs
to be removed prior to a data transfer.
There may be some special cases where the peripheral desires to abandon a DMA
transfer. The most likely case of this occurring is due to a floppy disk controller which
has overrun or underrun its FIFO, or software stopping a device prematurely.
In these cases, the peripheral wishes to stop further DMA activity. It may do so by
sending an LDRQ# message with the ACT bit as 0. However, since the DMA request was
seen by the PCH, there is no assurance that the cycle has not been granted and will
shortly run on LPC. Therefore, peripherals must take into account that a DMA cycle may
still occur. The peripheral can choose not to respond to this cycle, in which case the
host will abort it, or it can choose to complete the cycle normally with any random data.
This method of DMA de-assertion should be prevented whenever possible, to limit
boundary conditions both on the PCH and the peripheral.
5.6.3 General Flow of DMA Transfers
Arbitration for DMA channels is performed through the 8237 within the host. Once the
host has won arbitration on behalf of a DMA channel assigned to LPC, it asserts
LFRAME# on the LPC I/F and begins the DMA transfer. The general flow for a basic DMA
transfer is as follows:
1. The PCH starts transfer by asserting 0000b on LAD[3:0] with LFRAME# asserted.
2. The PCH asserts ‘cycle type’ of DMA, direction based on DMA transfer direction.
3. The PCH asserts channel number and, if applicable, terminal count.
4. The PCH indicates the size of the transfer: 8 or 16 bits.
5. If a DMA read…
The PCH drives the first 8 bits of data and turns the bus around.
The peripheral acknowledges the data with a valid SYNC.
If a 16-bit transfer, the process is repeated for the next 8 bits.
6. If a DMA write…
The PCH turns the bus around and waits for data.
The peripheral indicates data ready through SYNC and transfers the first byte.
If a 16-bit transfer, the peripheral indicates data ready and transfers the next
byte.
7. The peripheral turns around the bus.
5.6.4 Terminal Count
Terminal count is communicated through LAD[3] on the same clock that DMA channel is
communicated on LAD[2:0]. This field is the CHANNEL field. Terminal count indicates
the last byte of transfer, based upon the size of the transfer.
For example, on an 8-bit transfer size (SIZE field is 00b), if the TC bit is set, then this is
the last byte. On a 16-bit transfer (SIZE field is 01b), if the TC bit is set, then the
second byte is the last byte. The peripheral, therefore, must internalize the TC bit when
the CHANNEL field is communicated, and only signal TC when the last byte of that
transfer size has been transferred.
Datasheet 149
Functional Description
5.6.5 Verify Mode
Verify mode is supported on the LPC interface. A verify transfer to the peripheral is
similar to a DMA write, where the peripheral is transferring data to main memory. The
indication from the host is the same as a DMA write, so the peripheral will be driving
data onto the LPC interface. However, the host will not transfer this data into main
memory.
5.6.6 DMA Request De-assertion
An end of transfer is communicated to the PCH through a special SYNC field
transmitted by the peripheral. An LPC device must not attempt to signal the end of a
transfer by de-asserting LDREQ#. If a DMA transfer is several bytes (such as, a transfer
from a demand mode device) the PCH needs to know when to de-assert the DMA
request based on the data currently being transferred.
The DMA agent uses a SYNC encoding on each byte of data being transferred, which
indicates to the PCH whether this is the last byte of transfer or if more bytes are
requested. To indicate the last byte of transfer, the peripheral uses a SYNC value of
0000b (ready with no error), or 1010b (ready with error). These encodings tell the PCH
that this is the last piece of data transferred on a DMA read (PCH to peripheral), or the
byte that follows is the last piece of data transferred on a DMA write (peripheral to the
PCH).
When the PCH sees one of these two encodings, it ends the DMA transfer after this byte
and de-asserts the DMA request to the 8237. Therefore, if the PCH indicated a 16-bit
transfer, the peripheral can end the transfer after one byte by indicating a SYNC value
of 0000b or 1010b. The PCH does not attempt to transfer the second byte, and de-
asserts the DMA request internally.
If the peripheral indicates a 0000b or 1010b SYNC pattern on the last byte of the
indicated size, then the PCH only de-asserts the DMA request to the 8237 since it does
not need to end the transfer.
If the peripheral wishes to keep the DMA request active, then it uses a SYNC value of
1001b (ready plus more data). This tells the 8237 that more data bytes are requested
after the current byte has been transferred, so the PCH keeps the DMA request active
to the 8237. Therefore, on an 8-bit transfer size, if the peripheral indicates a SYNC
value of 1001b to the PCH, the data will be transferred and the DMA request will remain
active to the 8237. At a later time, the PCH will then come back with another
START–CYCTYPE–CHANNEL–SIZE etc. combination to initiate another transfer to the
peripheral.
The peripheral must not assume that the next START indication from the PCH is
another grant to the peripheral if it had indicated a SYNC value of 1001b. On a single
mode DMA device, the 8237 will re-arbitrate after every transfer. Only demand mode
DMA devices can be assured that they will receive the next START indication from the
PCH.
Note: Indicating a 0000b or 1010b encoding on the SYNC field of an odd byte of a 16-bit
channel (first byte of a 16-bit transfer) is an error condition.
Note: The host stops the transfer on the LPC bus as indicated, fills the upper byte with
random data on DMA writes (peripheral to memory), and indicates to the 8237 that the
DMA transfer occurred, incrementing the 8237’s address and decrementing its byte
count.
Functional Description
150 Datasheet
5.6.7 SYNC Field / LDRQ# Rules
Since DMA transfers on LPC are requested through an LDRQ# assertion message, and
are ended through a SYNC field during the DMA transfer, the peripheral must obey the
following rule when initiating back-to-back transfers from a DMA channel.
The peripheral must not assert another message for eight LCLKs after a de-assertion is
indicated through the SYNC field. This is needed to allow the 8237, that typically runs
off a much slower internal clock, to see a message de-asserted before it is re-asserted
so that it can arbitrate to the next agent.
Under default operation, the host only performs 8-bit transfers on 8-bit channels and
16-bit transfers on 16-bit channels.
The method by which this communication between host and peripheral through system
BIOS is performed is beyond the scope of this specification. Since the LPC host and LPC
peripheral are motherboard devices, no “plug-n-play” registry is required.
The peripheral must not assume that the host is able to perform transfer sizes that are
larger than the size allowed for the DMA channel, and be willing to accept a SIZE field
that is smaller than what it may currently have buffered.
To that end, it is recommended that future devices that may appear on the LPC bus,
that require higher bandwidth than 8-bit or 16-bit DMA allow, do so with a bus
mastering interface and not rely on the 8237.
5.7 8254 Timers (D31:F0)
The PCH contains three counters that have fixed uses. All registers and functions
associated with the 8254 timers are in the core well. The 8254 unit is clocked by a
14.31818 MHz clock.
Counter 0, System Timer
This counter functions as the system timer by controlling the state of IRQ0 and is
typically programmed for Mode 3 operation. The counter produces a square wave with
a period equal to the product of the counter period (838 ns) and the initial count value.
The counter loads the initial count value 1 counter period after software writes the
count value to the counter I/O address. The counter initially asserts IRQ0 and
decrements the count value by two each counter period. The counter negates IRQ0
when the count value reaches 0. It then reloads the initial count value and again
decrements the initial count value by two each counter period. The counter then
asserts IRQ0 when the count value reaches 0, reloads the initial count value, and
repeats the cycle, alternately asserting and negating IRQ0.
Counter 1, Refresh Request Signal
This counter provides the refresh request signal and is typically programmed for Mode
2 operation and only impacts the period of the REF_TOGGLE bit in Port 61. The initial
count value is loaded one counter period after being written to the counter I/O address.
The REF_TOGGLE bit will have a square wave behavior (alternate between 0 and 1) and
will toggle at a rate based on the value in the counter. Programming the counter to
anything other than Mode 2 will result in undefined behavior for the REF_TOGGLE bit.
Counter 2, Speaker Tone
This counter provides the speaker tone and is typically programmed for Mode 3
operation. The counter provides a speaker frequency equal to the counter clock
frequency (1.193 MHz) divided by the initial count value. The speaker must be enabled
by a write to port 061h (see NMI Status and Control ports).
Datasheet 151
Functional Description
5.7.1 Timer Programming
The counter/timers are programmed in the following fashion:
1. Write a control word to select a counter.
2. Write an initial count for that counter.
3. Load the least and/or most significant bytes (as required by Control Word bits 5, 4)
of the 16-bit counter.
4. Repeat with other counters.
Only two conventions need to be observed when programming the counters. First, for
each counter, the control word must be written before the initial count is written.
Second, the initial count must follow the count format specified in the control word
(least significant byte only, most significant byte only, or least significant byte and then
most significant byte).
A new initial count may be written to a counter at any time without affecting the
counter's programmed mode. Counting is affected as described in the mode definitions.
The new count must follow the programmed count format.
If a counter is programmed to read/write two-byte counts, the following precaution
applies: A program must not transfer control between writing the first and second byte
to another routine which also writes into that same counter. Otherwise, the counter will
be loaded with an incorrect count.
The Control Word Register at port 43h controls the operation of all three counters.
Several commands are available:
Control Word Command. Specifies which counter to read or write, the operating
mode, and the count format (binary or BCD).
Counter Latch Command. Latches the current count so that it can be read by the
system. The countdown process continues.
Read Back Command. Reads the count value, programmed mode, the current
state of the OUT pins, and the state of the Null Count Flag of the selected counter.
Table 5-12 lists the six operating modes for the interval counters.
Table 5-12. Counter Operating Modes
Mode Function Description
0 Out signal on end of count (=0) Output is 0. When count goes to 0, output goes to
1 and stays at 1 until counter is reprogrammed.
1 Hardware retriggerable one-shot Output is 0. When count goes to 0, output goes to
1 for one clock time.
2Rate generator (divide by n
counter)
Output is 1. Output goes to 0 for one clock time,
then back to 1 and counter is reloaded.
3Square wave output
Output is 1. Output goes to 0 when counter rolls
over, and counter is reloaded. Output goes to 1
when counter rolls over, and counter is reloaded,
etc.
4 Software triggered strobe Output is 1. Output goes to 0 when count expires
for one clock time.
5 Hardware triggered strobe Output is 1. Output goes to 0 when count expires
for one clock time.
Functional Description
152 Datasheet
5.7.2 Reading from the Interval Timer
It is often desirable to read the value of a counter without disturbing the count in
progress. There are three methods for reading the counters: a simple read operation,
counter Latch command, and the Read-Back command. Each is explained below.
With the simple read and counter latch command methods, the count must be read
according to the programmed format; specifically, if the counter is programmed for two
byte counts, two bytes must be read. The two bytes do not have to be read one right
after the other. Read, write, or programming operations for other counters may be
inserted between them.
5.7.2.1 Simple Read
The first method is to perform a simple read operation. The counter is selected through
port 40h (counter 0), 41h (counter 1), or 42h (counter 2).
Note: Performing a direct read from the counter does not return a determinate value,
because the counting process is asynchronous to read operations. However, in the case
of counter 2, the count can be stopped by writing to the GATE bit in port 61h.
5.7.2.2 Counter Latch Command
The Counter Latch command, written to port 43h, latches the count of a specific
counter at the time the command is received. This command is used to ensure that the
count read from the counter is accurate, particularly when reading a two-byte count.
The count value is then read from each counter’s Count register as was programmed by
the Control register.
The count is held in the latch until it is read or the counter is reprogrammed. The count
is then unlatched. This allows reading the contents of the counters on the fly without
affecting counting in progress. Multiple Counter Latch Commands may be used to latch
more than one counter. Counter Latch commands do not affect the programmed mode
of the counter in any way.
If a Counter is latched and then, some time later, latched again before the count is
read, the second Counter Latch command is ignored. The count read is the count at the
time the first Counter Latch command was issued.
5.7.2.3 Read Back Command
The Read Back command, written to port 43h, latches the count value, programmed
mode, and current states of the OUT pin and Null Count flag of the selected counter or
counters. The value of the counter and its status may then be read by I/O access to the
counter address.
The Read Back command may be used to latch multiple counter outputs at one time.
This single command is functionally equivalent to several counter latch commands, one
for each counter latched. Each counter's latched count is held until it is read or
reprogrammed. Once read, a counter is unlatched. The other counters remain latched
until they are read. If multiple count Read Back commands are issued to the same
counter without reading the count, all but the first are ignored.
The Read Back command may additionally be used to latch status information of
selected counters. The status of a counter is accessed by a read from that counter's
I/O port address. If multiple counter status latch operations are performed without
reading the status, all but the first are ignored.
Datasheet 153
Functional Description
Both count and status of the selected counters may be latched simultaneously. This is
functionally the same as issuing two consecutive, separate Read Back commands. If
multiple count and/or status Read Back commands are issued to the same counters
without any intervening reads, all but the first are ignored.
If both count and status of a counter are latched, the first read operation from that
counter returns the latched status, regardless of which was latched first. The next one
or two reads, depending on whether the counter is programmed for one or two type
counts, returns the latched count. Subsequent reads return unlatched count.
5.8 8259 Interrupt Controllers (PIC) (D31:F0)
The PCH incorporates the functionality of two 8259 interrupt controllers that provide
system interrupts for the ISA compatible interrupts. These interrupts are: system
timer, keyboard controller, serial ports, parallel ports, floppy disk, mouse, and DMA
channels. In addition, this interrupt controller can support the PCI based interrupts, by
mapping the PCI interrupt onto the compatible ISA interrupt line. Each 8259 core
supports eight interrupts, numbered 0–7. Table 5-13 shows how the cores are
connected.
.
The PCH cascades the slave controller onto the master controller through master
controller interrupt input 2. This means there are only 15 possible interrupts for the
PCH PIC.
Table 5-13. Interrupt Controller Core Connections
8259 8259
Input
Typical Interrupt
Source Connected Pin / Function
Master
0 Internal Internal Timer / Counter 0 output / HPET #0
1 Keyboard IRQ1 via SERIRQ
2 Internal Slave controller INTR output
3 Serial Port A IRQ3 via SERIRQ, PIRQ#
4 Serial Port B IRQ4 via SERIRQ, PIRQ#
5 Parallel Port / Generic IRQ5 via SERIRQ, PIRQ#
6 Floppy Disk IRQ6 via SERIRQ, PIRQ#
7 Parallel Port / Generic IRQ7 via SERIRQ, PIRQ#
Slave
0Internal Real Time
Clock Internal RTC / HPET #1
1 Generic IRQ9 via SERIRQ, SCI, TCO, or PIRQ#
2 Generic IRQ10 via SERIRQ, SCI, TCO, or PIRQ#
3Generic IRQ11 via SERIRQ, SCI, TCO, or PIRQ#, or HPET
#2
4PS/2 Mouse IRQ12 via SERIRQ, SCI, TCO, or PIRQ#, or HPET
#3
5Internal
State Machine output based on processor FERR#
assertion. May optionally be used for SCI or TCO
interrupt if FERR# not needed.
6SATA SATA Primary (legacy mode), or via SERIRQ or
PIRQ#
7SATA SATA Secondary (legacy mode) or via SERIRQ or
PIRQ#
Functional Description
154 Datasheet
Interrupts can individually be programmed to be edge or level, except for IRQ0, IRQ2,
IRQ8#, and IRQ13.
Note: Active-low interrupt sources (such as, the PIRQ#s) are inverted inside the PCH. In the
following descriptions of the 8259s, the interrupt levels are in reference to the signals
at the internal interface of the 8259s, after the required inversions have occurred.
Therefore, the term “high” indicates “active,” which means “low” on an originating
PIRQ#.
5.8.1 Interrupt Handling
5.8.1.1 Generating Interrupts
The PIC interrupt sequence involves three bits, from the IRR, ISR, and IMR, for each
interrupt level. These bits are used to determine the interrupt vector returned, and
status of any other pending interrupts. Table 5-14 defines the IRR, ISR, and IMR.
5.8.1.2 Acknowledging Interrupts
The processor generates an interrupt acknowledge cycle that is translated by the host
bridge into a PCI Interrupt Acknowledge Cycle to the PCH. The PIC translates this
command into two internal INTA# pulses expected by the 8259 cores. The PIC uses the
first internal INTA# pulse to freeze the state of the interrupts for priority resolution. On
the second INTA# pulse, the master or slave sends the interrupt vector to the
processor with the acknowledged interrupt code. This code is based upon bits [7:3] of
the corresponding ICW2 register, combined with three bits representing the interrupt
within that controller.
Table 5-14. Interrupt Status Registers
Bit Description
IRR
Interrupt Request Register. This bit is set on a low to high transition of the interrupt
line in edge mode, and by an active high level in level mode. This bit is set whether or
not the interrupt is masked. However, a masked interrupt will not generate INTR.
ISR
Interrupt Service Register. This bit is set, and the corresponding IRR bit cleared,
when an interrupt acknowledge cycle is seen, and the vector returned is for that
interrupt.
IMR Interrupt Mask Register. This bit determines whether an interrupt is masked.
Masked interrupts will not generate INTR.
Table 5-15. Content of Interrupt Vector Byte
Master, Slave Interrupt Bits [7:3] Bits [2:0]
IRQ7,15
ICW2[7:3]
111
IRQ6,14 110
IRQ5,13 101
IRQ4,12 100
IRQ3,11 011
IRQ2,10 010
IRQ1,9 001
IRQ0,8 000
Datasheet 155
Functional Description
5.8.1.3 Hardware/Software Interrupt Sequence
1. One or more of the Interrupt Request lines (IRQ) are raised high in edge mode, or
seen high in level mode, setting the corresponding IRR bit.
2. The PIC sends INTR active to the processor if an asserted interrupt is not masked.
3. The processor acknowledges the INTR and responds with an interrupt acknowledge
cycle. The cycle is translated into a PCI interrupt acknowledge cycle by the host
bridge. This command is broadcast over PCI by the PCH.
4. Upon observing its own interrupt acknowledge cycle on PCI, the PCH converts it
into the two cycles that the internal 8259 pair can respond to. Each cycle appears
as an interrupt acknowledge pulse on the internal INTA# pin of the cascaded
interrupt controllers.
5. Upon receiving the first internally generated INTA# pulse, the highest priority ISR
bit is set and the corresponding IRR bit is reset. On the trailing edge of the first
pulse, a slave identification code is broadcast by the master to the slave on a
private, internal three bit wide bus. The slave controller uses these bits to
determine if it must respond with an interrupt vector during the second INTA#
pulse.
6. Upon receiving the second internally generated INTA# pulse, the PIC returns the
interrupt vector. If no interrupt request is present because the request was too
short in duration, the PIC returns vector 7 from the master controller.
7. This completes the interrupt cycle. In AEOI mode the ISR bit is reset at the end of
the second INTA# pulse. Otherwise, the ISR bit remains set until an appropriate
EOI command is issued at the end of the interrupt subroutine.
5.8.2 Initialization Command Words (ICWx)
Before operation can begin, each 8259 must be initialized. In the PCH, this is a four
byte sequence. The four initialization command words are referred to by their
acronyms: ICW1, ICW2, ICW3, and ICW4.
The base address for each 8259 initialization command word is a fixed location in the
I/O memory space: 20h for the master controller, and A0h for the slave controller.
5.8.2.1 ICW1
An I/O write to the master or slave controller base address with data bit 4 equal to 1 is
interpreted as a write to ICW1. Upon sensing this write, the PCH’s PIC expects three
more byte writes to 21h for the master controller, or A1h for the slave controller, to
complete the ICW sequence.
A write to ICW1 starts the initialization sequence during which the following
automatically occur:
1. Following initialization, an interrupt request (IRQ) input must make a low-to-high
transition to generate an interrupt.
2. The Interrupt Mask Register is cleared.
3. IRQ7 input is assigned priority 7.
4. The slave mode address is set to 7.
5. Special mask mode is cleared and Status Read is set to IRR.
Functional Description
156 Datasheet
5.8.2.2 ICW2
The second write in the sequence (ICW2) is programmed to provide bits [7:3] of the
interrupt vector that will be released during an interrupt acknowledge. A different base
is selected for each interrupt controller.
5.8.2.3 ICW3
The third write in the sequence (ICW3) has a different meaning for each controller.
For the master controller, ICW3 is used to indicate which IRQ input line is used to
cascade the slave controller. Within the PCH, IRQ2 is used. Therefore, bit 2 of ICW3
on the master controller is set to a 1, and the other bits are set to 0s.
For the slave controller, ICW3 is the slave identification code used during an
interrupt acknowledge cycle. On interrupt acknowledge cycles, the master
controller broadcasts a code to the slave controller if the cascaded interrupt won
arbitration on the master controller. The slave controller compares this
identification code to the value stored in its ICW3, and if it matches, the slave
controller assumes responsibility for broadcasting the interrupt vector.
5.8.2.4 ICW4
The final write in the sequence (ICW4) must be programmed for both controllers. At
the very least, bit 0 must be set to a 1 to indicate that the controllers are operating in
an Intel Architecture-based system.
5.8.3 Operation Command Words (OCW)
These command words reprogram the Interrupt controller to operate in various
interrupt modes.
OCW1 masks and unmasks interrupt lines.
OCW2 controls the rotation of interrupt priorities when in rotating priority mode,
and controls the EOI function.
OCW3 sets up ISR/IRR reads, enables/disables the special mask mode (SMM), and
enables/disables polled interrupt mode.
5.8.4 Modes of Operation
5.8.4.1 Fully Nested Mode
In this mode, interrupt requests are ordered in priority from 0 through 7, with 0 being
the highest. When an interrupt is acknowledged, the highest priority request is
determined and its vector placed on the bus. Additionally, the ISR for the interrupt is
set. This ISR bit remains set until: the processor issues an EOI command immediately
before returning from the service routine; or if in AEOI mode, on the trailing edge of
the second INTA#. While the ISR bit is set, all further interrupts of the same or lower
priority are inhibited, while higher levels generate another interrupt. Interrupt priorities
can be changed in the rotating priority mode.
Datasheet 157
Functional Description
5.8.4.2 Special Fully-Nested Mode
This mode is used in the case of a system where cascading is used, and the priority has
to be conserved within each slave. In this case, the special fully-nested mode is
programmed to the master controller. This mode is similar to the fully-nested mode
with the following exceptions:
When an interrupt request from a certain slave is in service, this slave is not locked
out from the master's priority logic and further interrupt requests from higher
priority interrupts within the slave are recognized by the master and initiate
interrupts to the processor. In the normal-nested mode, a slave is masked out
when its request is in service.
When exiting the Interrupt Service routine, software has to check whether the
interrupt serviced was the only one from that slave. This is done by sending a Non-
Specific EOI command to the slave and then reading its ISR. If it is 0, a non-
specific EOI can also be sent to the master.
5.8.4.3 Automatic Rotation Mode (Equal Priority Devices)
In some applications, there are a number of interrupting devices of equal priority.
Automatic rotation mode provides for a sequential 8-way rotation. In this mode, a
device receives the lowest priority after being serviced. In the worst case, a device
requesting an interrupt has to wait until each of seven other devices are serviced at
most once.
There are two ways to accomplish automatic rotation using OCW2; the Rotation on
Non-Specific EOI Command (R=1, SL=0, EOI=1) and the rotate in automatic EOI mode
which is set by (R=1, SL=0, EOI=0).
5.8.4.4 Specific Rotation Mode (Specific Priority)
Software can change interrupt priorities by programming the bottom priority. For
example, if IRQ5 is programmed as the bottom priority device, then IRQ6 is the highest
priority device. The Set Priority Command is issued in OCW2 to accomplish this, where:
R=1, SL=1, and LO–L2 is the binary priority level code of the bottom priority device.
In this mode, internal status is updated by software control during OCW2. However, it
is independent of the EOI command. Priority changes can be executed during an EOI
command by using the Rotate on Specific EOI Command in OCW2 (R=1, SL=1, EOI=1
and LO–L2=IRQ level to receive bottom priority.
5.8.4.5 Poll Mode
Poll mode can be used to conserve space in the interrupt vector table. Multiple
interrupts that can be serviced by one interrupt service routine do not need separate
vectors if the service routine uses the poll command. Poll mode can also be used to
expand the number of interrupts. The polling interrupt service routine can call the
appropriate service routine, instead of providing the interrupt vectors in the vector
table. In this mode, the INTR output is not used and the microprocessor internal
Interrupt Enable flip-flop is reset, disabling its interrupt input. Service to devices is
achieved by software using a Poll command.
The Poll command is issued by setting P=1 in OCW3. The PIC treats its next I/O read as
an interrupt acknowledge, sets the appropriate ISR bit if there is a request, and reads
the priority level. Interrupts are frozen from the OCW3 write to the I/O read. The byte
returned during the I/O read contains a 1 in bit 7 if there is an interrupt, and the binary
code of the highest priority level in bits 2:0.
Functional Description
158 Datasheet
5.8.4.6 Edge and Level Triggered Mode
In ISA systems this mode is programmed using bit 3 in ICW1, which sets level or edge
for the entire controller. In the PCH, this bit is disabled and a new register for edge and
level triggered mode selection, per interrupt input, is included. This is the Edge/Level
control Registers ELCR1 and ELCR2.
If an ELCR bit is 0, an interrupt request will be recognized by a low-to-high transition
on the corresponding IRQ input. The IRQ input can remain high without generating
another interrupt. If an ELCR bit is 1, an interrupt request will be recognized by a high
level on the corresponding IRQ input and there is no need for an edge detection. The
interrupt request must be removed before the EOI command is issued to prevent a
second interrupt from occurring.
In both the edge and level triggered modes, the IRQ inputs must remain active until
after the falling edge of the first internal INTA#. If the IRQ input goes inactive before
this time, a default IRQ7 vector is returned.
5.8.4.7 End of Interrupt (EOI) Operations
An EOI can occur in one of two fashions: by a command word write issued to the PIC
before returning from a service routine, the EOI command; or automatically when AEOI
bit in ICW4 is set to 1.
5.8.4.8 Normal End of Interrupt
In normal EOI, software writes an EOI command before leaving the interrupt service
routine to mark the interrupt as completed. There are two forms of EOI commands:
Specific and Non-Specific. When a Non-Specific EOI command is issued, the PIC clears
the highest ISR bit of those that are set to 1. Non-Specific EOI is the normal mode of
operation of the PIC within the PCH, as the interrupt being serviced currently is the
interrupt entered with the interrupt acknowledge. When the PIC is operated in modes
that preserve the fully nested structure, software can determine which ISR bit to clear
by issuing a Specific EOI. An ISR bit that is masked is not cleared by a Non-Specific EOI
if the PIC is in the special mask mode. An EOI command must be issued for both the
master and slave controller.
5.8.4.9 Automatic End of Interrupt Mode
In this mode, the PIC automatically performs a Non-Specific EOI operation at the
trailing edge of the last interrupt acknowledge pulse. From a system standpoint, this
mode should be used only when a nested multi-level interrupt structure is not required
within a single PIC. The AEOI mode can only be used in the master controller and not
the slave controller.
Datasheet 159
Functional Description
5.8.5 Masking Interrupts
5.8.5.1 Masking on an Individual Interrupt Request
Each interrupt request can be masked individually by the Interrupt Mask Register
(IMR). This register is programmed through OCW1. Each bit in the IMR masks one
interrupt channel. Masking IRQ2 on the master controller masks all requests for service
from the slave controller.
5.8.5.2 Special Mask Mode
Some applications may require an interrupt service routine to dynamically alter the
system priority structure during its execution under software control. For example, the
routine may wish to inhibit lower priority requests for a portion of its execution but
enable some of them for another portion.
The special mask mode enables all interrupts not masked by a bit set in the Mask
register. Normally, when an interrupt service routine acknowledges an interrupt without
issuing an EOI to clear the ISR bit, the interrupt controller inhibits all lower priority
requests. In the special mask mode, any interrupts may be selectively enabled by
loading the Mask Register with the appropriate pattern. The special mask mode is set
by OCW3 where: SSMM=1, SMM=1, and cleared where SSMM=1, SMM=0.
5.8.6 Steering PCI Interrupts
The PCH can be programmed to allow PIRQA#-PIRQH# to be routed internally to
interrupts 3–7, 9–12, 14 or 15. The assignment is programmable through the PIRQx
Route Control registers, located at 60–63h and 68–6Bh in Device 31:Function 0. One or
more PIRQx# lines can be routed to the same IRQx input. If interrupt steering is not
required, the Route registers can be programmed to disable steering.
The PIRQx# lines are defined as active low, level sensitive to allow multiple interrupts
on a PCI board to share a single line across the connector. When a PIRQx# is routed to
specified IRQ line, software must change the IRQ's corresponding ELCR bit to level
sensitive mode. The PCH internally inverts the PIRQx# line to send an active high level
to the PIC. When a PCI interrupt is routed onto the PIC, the selected IRQ can no longer
be used by an active high device (through SERIRQ). However, active low interrupts can
share their interrupt with PCI interrupts.
Internal sources of the PIRQs, including SCI and TCO interrupts, cause the external
PIRQ to be asserted. The PCH receives the PIRQ input, like all of the other external
sources, and routes it accordingly.
Functional Description
160 Datasheet
5.9 Advanced Programmable Interrupt Controller
(APIC) (D31:F0)
In addition to the standard ISA-compatible PIC described in the previous chapter, the
PCH incorporates the APIC. While the standard interrupt controller is intended for use
in a uni-processor system, APIC can be used in either a uni-processor or multi-
processor system.
5.9.1 Interrupt Handling
The I/O APIC handles interrupts very differently than the 8259. Briefly, these
differences are:
Method of Interrupt Transmission. The I/O APIC transmits interrupts through
memory writes on the normal datapath to the processor, and interrupts are handled
without the need for the processor to run an interrupt acknowledge cycle.
Interrupt Priority. The priority of interrupts in the I/O APIC is independent of the
interrupt number. For example, interrupt 10 can be given a higher priority than
interrupt 3.
More Interrupts. The I/O APIC in the PCH supports a total of 24 interrupts.
Multiple Interrupt Controllers. The I/O APIC architecture allows for multiple I/O
APIC devices in the system with their own interrupt vectors.
5.9.2 Interrupt Mapping
The I/O APIC within the PCH supports 24 APIC interrupts. Each interrupt has its own
unique vector assigned by software. The interrupt vectors are mapped as follows, and
match “Config 6” of the Multi-Processor Specification.
Table 5-16. APIC Interrupt Mapping1 (Sheet 1 of 2)
IRQ # Using
SERIRQ
Direct
from Pin
Using PCI
Message Internal Modules
0 No No No Cascade from 8259 #1
1Yes No Yes
2 No No No 8254 Counter 0, HPET #0 (legacy mode)
3Yes No Yes
4Yes No Yes
5Yes No Yes
6Yes No Yes
7Yes No Yes
8No No NoRTC, HPET #1 (legacy mode)
9 Yes No Yes Option for SCI, TCO
10 Yes No Yes Option for SCI, TCO
11 Yes No Yes HPET #2, Option for SCI, TCO (Note2)
12 Yes No Yes HPET #3 (Note 3)
13 No No No FERR# logic
14 Yes No Yes SATA Primary (legacy mode)
15 Yes No Yes SATA Secondary (legacy mode)
Datasheet 161
Functional Description
NOTES:
1. When programming the polarity of internal interrupt sources on the APIC, interrupts 0
through 15 receive active-high internal interrupt sources, while interrupts 16 through 23
receive active-low internal interrupt sources.
2. If IRQ 11 is used for HPET #2, software should ensure IRQ 11 is not shared with any other
devices to ensure the proper operation of HPET #2. The PCH hardware does not prevent
sharing of IRQ 11.
3. If IRQ 12 is used for HPET #3, software should ensure IRQ 12 is not shared with any other
devices to ensure the proper operation of HPET #3. The PCH hardware does not prevent
sharing of IRQ 12.
4. PIRQ[E:H] are Multiplexed with GPIO pins. Interrupts PIRQ[E:H] will not be exposed if they
are configured as GPIOs.
5.9.3 PCI / PCI Express* Message-Based Interrupts
When external devices through PCI / PCI Express wish to generate an interrupt, they
will send the message defined in the PCI Express* Base Specification, Revision 1.0a for
generating INTA# – INTD#. These will be translated internal assertions/de-assertions
of INTA# – INTD#.
5.9.4 IOxAPIC Address Remapping
To support Intel® Virtualization Technology, interrupt messages are required to go
through similar address remapping as any other memory request. Address remapping
allows for domain isolation for interrupts, so a device assigned in one domain is not
allowed to generate an interrupt to another domain.
The address remapping is based on the Bus: Device: Function field associated with the
requests. The internal APIC is required to initiate the interrupt message using a unique
Bus: Device: function.
The PCH allows BIOS to program the unique Bus: Device: Function address for the
internal APIC. This address field does not change the APIC functionality and the APIC is
not promoted as a stand-alone PCI device. See Device 31: Function 0 Offset 6Ch for
additional information.
5.9.5 External Interrupt Controller Support
The PCH supports external APICs off of PCI Express ports, and does not support APICs
on the PCI bus. The EOI special cycle is only forwarded to PCI Express ports.
16 PIRQA# PIRQA#
Yes Internal devices are routable; see
Section 10.1.26 though Section 10.1.42.
17 PIRQB# PIRQB#
18 PIRQC# PIRQC#
19 PIRQD# PIRQD#
20 N/A PIRQE#4
Yes
Option for SCI, TCO, HPET #0,1,2, 3. Other
internal devices are routable; see
Section 10.1.26 though Section 10.1.42.
21 N/A PIRQF#4
22 N/A PIRQG#4
23 N/A PIRQH#4
Table 5-16. APIC Interrupt Mapping1 (Sheet 2 of 2)
IRQ # Using
SERIRQ
Direct
from Pin
Using PCI
Message Internal Modules
Functional Description
162 Datasheet
5.10 Serial Interrupt (D31:F0)
The PCH supports a serial IRQ scheme. This allows a single signal to be used to report
interrupt requests. The signal used to transmit this information is shared between the
host, the PCH, and all peripherals that support serial interrupts. The signal line,
SERIRQ, is synchronous to PCI clock, and follows the sustained tri-state protocol that is
used by all PCI signals. This means that if a device has driven SERIRQ low, it will first
drive it high synchronous to PCI clock and release it the following PCI clock. The serial
IRQ protocol defines this sustained tri-state signaling in the following fashion:
S – Sample Phase. Signal driven low
R Recovery Phase. Signal driven high
T Turn-around Phase. Signal released
The PCH supports a message for 21 serial interrupts. These represent the 15 ISA
interrupts (IRQ0–1, 2–15), the four PCI interrupts, and the control signals SMI# and
IOCHK#. The serial IRQ protocol does not support the additional APIC interrupts
(20–23).
Note: When the SATA controller is configured for legacy IDE mode, IRQ14 and IRQ15 are
expected to behave as ISA legacy interrupts that cannot be shared (that is, through the
Serial Interrupt pin). If IRQ14 and IRQ15 are shared with Serial Interrupt pin then
abnormal system behavior may occur. For example, IRQ14/15 may not be detected by
the PCH's interrupt controller. When the SATA controller is not running in Native IDE
mode, IRQ14 and IRQ15 are used as special interrupts. If the SATA controller is in
native modes, these interrupts can be mapped to other devices accordingly.
5.10.1 Start Frame
The serial IRQ protocol has two modes of operation which affect the start frame. These
two modes are: Continuous, where the PCH is solely responsible for generating the
start frame; and Quiet, where a serial IRQ peripheral is responsible for beginning the
start frame.
The mode that must first be entered when enabling the serial IRQ protocol is
continuous mode. In this mode, the PCH asserts the start frame. This start frame is 4,
6, or 8 PCI clocks wide based upon the Serial IRQ Control Register, bits 1:0 at 64h in
Device 31:Function 0 configuration space. This is a polling mode.
When the serial IRQ stream enters quiet mode (signaled in the Stop Frame), the
SERIRQ line remains inactive and pulled up between the Stop and Start Frame until a
peripheral drives the SERIRQ signal low. The PCH senses the line low and continues to
drive it low for the remainder of the Start Frame. Since the first PCI clock of the start
frame was driven by the peripheral in this mode, the PCH drives the SERIRQ line low for
1 PCI clock less than in continuous mode. This mode of operation allows for a quiet,
and therefore lower power, operation.
Datasheet 163
Functional Description
5.10.2 Data Frames
Once the Start frame has been initiated, all of the SERIRQ peripherals must start
counting frames based on the rising edge of SERIRQ. Each of the IRQ/DATA frames has
exactly 3 phases of 1 clock each:
Sample Phase. During this phase, the SERIRQ device drives SERIRQ low if the
corresponding interrupt signal is low. If the corresponding interrupt is high, then
the SERIRQ devices tri-state the SERIRQ signal. The SERIRQ line remains high due
to pull-up resistors (there is no internal pull-up resistor on this signal, an external
pull-up resistor is required). A low level during the IRQ0–1 and IRQ2–15 frames
indicates that an active-high ISA interrupt is not being requested, but a low level
during the PCI INT[A:D], SMI#, and IOCHK# frame indicates that an active-low
interrupt is being requested.
Recovery Phase. During this phase, the device drives the SERIRQ line high if in
the Sample Phase it was driven low. If it was not driven in the sample phase, it is
tri-stated in this phase.
Turn-around Phase. The device tri-states the SERIRQ line.
5.10.3 Stop Frame
After all data frames, a Stop Frame is driven by the PCH. The SERIRQ signal is driven
low by the PCH for 2 or 3 PCI clocks. The number of clocks is determined by the
SERIRQ configuration register. The number of clocks determines the next mode.
5.10.4 Specific Interrupts Not Supported Using SERIRQ
There are three interrupts seen through the serial stream that are not supported by the
PCH. These interrupts are generated internally, and are not sharable with other devices
within the system. These interrupts are:
IRQ0. Heartbeat interrupt generated off of the internal 8254 counter 0.
IRQ8#. RTC interrupt can only be generated internally.
IRQ13. Floating point error interrupt generated off of the processor assertion of
FERR#.
The PCH ignores the state of these interrupts in the serial stream, and does not adjust
their level based on the level seen in the serial stream.
Table 5-17. Stop Frame Explanation
Stop Frame Width Next Mode
2 PCI clocks Quiet Mode. Any SERIRQ device may initiate a Start Frame
3 PCI clocks Continuous Mode. Only the host (the PCH) may initiate a Start Frame
Functional Description
164 Datasheet
5.10.5 Data Frame Format
Table 5-18 shows the format of the data frames. For the PCI interrupts (A–D), the
output from the PCH is AND’d with the PCI input signal. This way, the interrupt can be
signaled using both the PCI interrupt input signal and using the SERIRQ signal (they
are shared).
Table 5-18. Data Frame Format
Data
Frame
#
Interrupt
Clocks Past
Start
Frame
Comment
1IRQ0 2
Ignored. IRQ0 can only be generated using the internal
8524
2IRQ1 5
3 SMI# 8 Causes SMI# if low. Will set the SERIRQ_SMI_STS bit.
4IRQ3 11
5IRQ4 14
6IRQ5 17
7IRQ6 20
8IRQ7 23
9 IRQ8 26 Ignored. IRQ8# can only be generated internally.
10 IRQ9 29
11 IRQ10 32
12 IRQ11 35
13 IRQ12 38
14 IRQ13 41 Ignored. IRQ13 can only be generated from FERR#
15 IRQ14 44 Not attached to SATA logic
16 IRQ15 47 Not attached to SATA logic
17 IOCHCK# 50 Same as ISA IOCHCK# going active.
18 PCI INTA# 53 Drive PIRQA#
19 PCI INTB# 56 Drive PIRQB#
20 PCI INTC# 59 Drive PIRQC#
21 PCI INTD# 62 Drive PIRQD#
Datasheet 165
Functional Description
5.11 Real Time Clock (D31:F0)
The Real Time Clock (RTC) module provides a battery backed-up date and time keeping
device with two banks of static RAM with 128 bytes each, although the first bank has
114 bytes for general purpose usage. Three interrupt features are available: time of
day alarm with once a second to once a month range, periodic rates of 122 µs to
500 ms, and end of update cycle notification. Seconds, minutes, hours, days, day of
week, month, and year are counted. Daylight savings compensation is no longer
supported. The hour is represented in twelve or twenty-four hour format, and data can
be represented in BCD or binary format. The design is functionally compatible with the
Motorola MS146818B. The time keeping comes from a 32.768 kHz oscillating source,
which is divided to achieve an update every second. The lower 14 bytes on the lower
RAM block has very specific functions. The first ten are for time and date information.
The next four (0Ah to 0Dh) are registers, which configure and report RTC functions.
The time and calendar data should match the data mode (BCD or binary) and hour
mode (12 or 24 hour) as selected in register B. It is up to the programmer to make
sure that data stored in these locations is within the reasonable values ranges and
represents a possible date and time. The exception to these ranges is to store a value
of C0–FFh in the Alarm bytes to indicate a don’t care situation. All Alarm conditions
must match to trigger an Alarm Flag, which could trigger an Alarm Interrupt if enabled.
The SET bit must be 1 while programming these locations to avoid clashes with an
update cycle. Access to time and date information is done through the RAM locations. If
a RAM read from the ten time and date bytes is attempted during an update cycle, the
value read do not necessarily represent the true contents of those locations. Any RAM
writes under the same conditions are ignored.
Note: The leap year determination for adding a 29th day to February does not take into
account the end-of-the-century exceptions. The logic simply assumes that all years
divisible by 4 are leap years. According to the Royal Observatory Greenwich, years that
are divisible by 100 are typically not leap years. In every fourth century (years divisible
by 400, like 2000), the 100-year-exception is over-ridden and a leap-year occurs. Note
that the year 2100 will be the first time in which the current RTC implementation would
incorrectly calculate the leap-year.
The PCH does not implement month/year alarms.
5.11.1 Update Cycles
An update cycle occurs once a second, if the SET bit of register B is not asserted and
the divide chain is properly configured. During this procedure, the stored time and date
are incremented, overflow is checked, a matching alarm condition is checked, and the
time and date are rewritten to the RAM locations. The update cycle will start at least
488 µs after the UIP bit of register A is asserted, and the entire cycle does not take
more than 1984 µs to complete. The time and date RAM locations (0–9) are
disconnected from the external bus during this time.
To avoid update and data corruption conditions, external RAM access to these locations
can safely occur at two times. When a updated-ended interrupt is detected, almost
999 ms is available to read and write the valid time and date data. If the UIP bit of
Register A is detected to be low, there is at least 488 µs before the update cycle begins.
Warning: The overflow conditions for leap years adjustments are based on more than one date or
time item. To ensure proper operation when adjusting the time, the new time and data
values should be set at least two seconds before leap year occurs.
Functional Description
166 Datasheet
5.11.2 Interrupts
The real-time clock interrupt is internally routed within the PCH both to the I/O APIC
and the 8259. It is mapped to interrupt vector 8. This interrupt does not leave the PCH,
nor is it shared with any other interrupt. IRQ8# from the SERIRQ stream is ignored.
However, the High Performance Event Timers can also be mapped to IRQ8#; in this
case, the RTC interrupt is blocked.
5.11.3 Lockable RAM Ranges
The RTC battery-backed RAM supports two 8-byte ranges that can be locked using the
configuration space. If the locking bits are set, the corresponding range in the RAM will
not be readable or writable. A write cycle to those locations will have no effect. A read
cycle to those locations will not return the location’s actual value (resultant value is
undefined).
Once a range is locked, the range can be unlocked only by a hard reset, which will
invoke the BIOS and allow it to relock the RAM range.
5.11.4 Century Rollover
The PCH detects a rollover when the Year byte (RTC I/O space, index offset 09h)
transitions form 99 to 00. Upon detecting the rollover, the PCH sets the
NEWCENTURY_STS bit (TCOBASE + 04h, bit 7). If the system is in an S0 state, this
causes an SMI#. The SMI# handler can update registers in the RTC RAM that are
associated with century value. If the system is in a sleep state (S1–S5) when the
century rollover occurs, the PCH also sets the NEWCENTURY_STS bit, but no SMI# is
generated. When the system resumes from the sleep state, BIOS should check the
NEWCENTURY_STS bit and update the century value in the RTC RAM.
5.11.5 Clearing Battery-Backed RTC RAM
Clearing CMOS RAM in a PCH-based platform can be done by using a jumper on
RTCRST# or GPI. Implementations should not attempt to clear CMOS by using a
jumper to pull VccRTC low.
Using RTCRST# to Clear CMOS
A jumper on RTCRST# can be used to clear CMOS values, as well as reset to default,
the state of those configuration bits that reside in the RTC power well. When the
RTCRST# is strapped to ground, the RTC_PWR_STS bit (D31:F0:A4h bit 2) will be set
and those configuration bits in the RTC power well will be set to their default state.
BIOS can monitor the state of this bit, and manually clear the RTC CMOS array once the
system is booted. The normal position would cause RTCRST# to be pulled up through a
weak pull-up resistor. Table 5-19 shows which bits are set to their default state when
RTCRST# is asserted. This RTCRST# jumper technique allows the jumper to be moved
and then replaced—all while the system is powered off. Then, once booted, the
RTC_PWR_STS can be detected in the set state.
Datasheet 167
Functional Description
Using a GPI to Clear CMOS
A jumper on a GPI can also be used to clear CMOS values. BIOS would detect the
setting of this GPI on system boot-up, and manually clear the CMOS array.
Note: The GPI strap technique to clear CMOS requires multiple steps to implement. The
system is booted with the jumper in new position, then powered back down. The
jumper is replaced back to the normal position, then the system is rebooted again.
Warning: Do not implement a jumper on VccRTC to clear CMOS.
Table 5-19. Configuration Bits Reset by RTCRST# Assertion
Bit Name Register Location Bit(s) Default
State
Alarm Interrupt
Enable (AIE)
Register B (General
Configuration) (RTC_REGB)
I/O space (RTC Index
+ 0Bh) 5X
Alarm Flag (AF) Register C (Flag Register)
(RTC_REGC)
I/O space (RTC Index
+ 0Ch) 5X
SWSMI_RATE_SEL General PM Configuration 3
Register GEN_PMCON_3 D31:F0:A4h 7:6 0
SLP_S4# Minimum
Assertion Width
General PM Configuration 3
Register GEN_PMCON_3 D31:F0:A4h 5:4 0
SLP_S4# Assertion
Stretch Enable
General PM Configuration 3
Register GEN_PMCON_3 D31:F0:A4h 3 0
RTC Power Status
(RTC_PWR_STS)
General PM Configuration 3
Register GEN_PMCON_3 D31:F0:A4h 2 0
Power Failure
(PWR_FLR)
General PM Configuration 3
Register (GEN_PMCON_3) D31:F0:A4h 1 0
AFTERG3_EN General PM Configuration 3
Register GEN_PMCON_3 D31:F0:A4h 0 0
Power Button
Override Status
(PRBTNOR_STS)
Power Management 1 Status
Register (PM1_STS) PMBase + 00h 11 0
RTC Event Enable
(RTC_EN)
Power Management 1 Enable
Register (PM1_EN) PMBase + 02h 10 0
Sleep Type
(SLP_TYP)
Power Management 1 Control
(PM1_CNT) PMBase + 04h 12:10 0
PME_EN General Purpose Event 0
Enables Register (GPE0_EN) PMBase + 2Ch 11 0
BATLOW_EN General Purpose Event 0
Enables Register (GPE0_EN) PMBase + 2Ch 10 0
RI_EN General Purpose Event 0
Enables Register (GPE0_EN) PMBase + 2Ch 8 0
NEWCENTURY_ST
S
TCO1 Status Register
(TCO1_STS) TCOBase + 04h 7 0
Intruder Detect
(INTRD_DET)
TCO2 Status Register
(TCO2_STS) TCOBase + 06h 0 0
Top Swap (T S) Backed Up Control Register
(BUC)
Chipset Config
Registers:Offset 3414h 0X
Functional Description
168 Datasheet
5.12 Processor Interface (D31:F0)
The PCH interfaces to the processor with following pin-based signals other than DMI:
Standard Outputs to processor: A20GATE, INIT3_3V#, PROCPWRGD, PMSYNCH,
PECI.
Standard Input from processor: THRMTRIP#.
Most PCH outputs to the processor use standard buffers. The PCH has separate
V_CPU_IO signals that are pulled up at the system level to the processor voltage, and
thus determines VOH for the outputs to the processor.
The following Processor interface legacy pins were removed from the PCH:
IGNNE#, STPCLK#, DPSLP#, are DPRSLPVR are no longer required on PCH based
systems.
A20M#, SMI#, NMI, INIT#, INTR, FERR#: Functionality has been replaced by in-
band Virtual Legacy Wire (VLW) messages. See Section 5.12.3.
5.12.1 Processor Interface Signals and VLW Messages
This section describes each of the signals that interface between the PCH and the
processor(s). Note that the behavior of some signals may vary during processor reset,
as the signals are used for frequency strapping.
5.12.1.1 A20M# (Mask A20) / A20GATE
The A20M# VLW message is asserted when both of the following conditions are true:
The ALT_A20_GATE bit (Bit 1 of PORT92 register) is a 0.
The A20GATE input signal is a 0.
The A20GATE input signal is expected to be generated by the external microcontroller
(KBC).
Datasheet 169
Functional Description
5.12.1.2 INIT (Initialization)
The INIT# VLW Message is asserted based on any one of several events described in
Table 5-20. When any of these events occur, INIT# is asserted for 16 PCI clocks, then
driven high.
Note: INIT3_3V# is functionally identical to INIT# VLW but it is a physical signal at 3.3 V on
desktop SKUs only.
5.12.1.3 FERR# (Numeric Coprocessor Error)
The PCH supports the coprocessor error function with the FERR# message. The
function is enabled using the CEN bit. If FERR# is driven active by the processor, IRQ13
goes active (internally). When it detects a write to the COPROC_ERR register (I/O
Register F0h), the PCH negates the internal IRQ13 and IGNNE# will be active. IGNNE#
remains active until FERR# is driven inactive. IGNNE# is never driven active unless
FERR# is active.
Note: IGNNE# (Ignore Numeric Error is now internally generated by the processor.
Table 5-20. INIT# Going Active
Cause of INIT3_3V# Going Active Comment
Shutdown special cycle from processor observed
on PCH-Processor interconnect.
INIT assertion based on value of Shutdown
Policy Select register (SPS)
PORT92 write, where INIT_NOW (bit 0) transitions
from a 0 to a 1.
PORTCF9 write, where SYS_RST (bit 1) was a 0
and RST_CPU (bit 2) transitions from 0 to 1.
RCIN# input signal goes low. RCIN# is expected
to be driven by the external microcontroller
(KBC).
0 to 1 transition on RCIN# must occur
before the PCH will arm INIT3_3V# to be
generated again.
NOTE: RCIN# signal is expected to be low
during S3, S4, and S5 states.
Transition on the RCIN# signal in
those states (or the transition to
those states) may not necessarily
cause the INIT3_3V# signal to be
generated to the processor.
CPU BIST
To enter BIST, software sets CPU_BIST_EN
bit and then does a full processor reset
using the CF9 register.
Functional Description
170 Datasheet
5.12.1.4 NMI (Non-Maskable Interrupt)
Non-Maskable Interrupts (NMIs) can be generated by several sources, as described in
Table 5-21.
5.12.1.5 Processor Power Good (PROCPWRGD)
This signal is connected to the processor’s VCCPRWGOOD_0 and VCCPRWGOOD_1
input. This signal represents a logical AND of the PCH’s PWROK and SYS_PWROK
signals.
5.12.2 Dual-Processor Issues
5.12.2.1 Usage Differences
In dual-processor designs, some of the processor signals are unused or used differently
than for uniprocessor designs.
A20M#/A20GATE and FERR# are generally not used, but still supported.
I/O APIC and SMI# are assumed to be used.
5.12.3 Virtual Legacy Wire (VLW) Messages
The PCH supports VLW messages as alternative method of conveying the status of the
following legacy sideband interface signals to the processor:
A20M#, INTR, SMI#, INIT#, NMI
Note: IGNNE# VLW message is not required to be generated by the PCH as it is internally
emulated by the Processor.
VLW are inbound messages to the processor. They are communicated using Vendor
Defined Message over the DMI link.
Legacy processor signals can only be delivered using VLW in the PCH. Delivery of
legacy processor signals (A20M#, INTR, SMI#, INIT# or NMI) using I/O APIC controller
is not supported.
Table 5-21. NMI Sources
Cause of NMI Comment
SERR# goes active (either internally,
externally using SERR# signal, or using
message from processor)
Can instead be routed to generate an SCI, through
the NMI2SCI_EN bit (Device 31:Function 0, TCO
Base + 08h, bit 11).
IOCHK# goes active using SERIRQ#
stream (ISA system Error)
Can instead be routed to generate an SCI, through
the NMI2SCI_EN bit (Device 31:Function 0, TCO
Base + 08h, bit 11).
Datasheet 171
Functional Description
5.13 Power Management (D31:F0)
5.13.1 Features
Support for Advanced Configuration and Power Interface, Version 3.0b (ACPI)
providing power and thermal management
ACPI 24-Bit Timer SCI and SMI# Generation
PCI PME# signal for Wake Up from Low-Power states
System Sleep State Control
ACPI S3 state—Suspend to RAM (STR)
ACPI S4 state—Suspend-to-Disk (STD)
ACPI G2/S5 state—Soft Off (SOFF)
Power Failure Detection and Recovery
Management Engine Power Management Support
Wake events from the Management Engine (enabled from all S-States including
Catastrophic S5 conditions)
5.13.2 PCH and System Power States
Table 5-22 shows the power states defined for PCH-based platforms. The state names
generally match the corresponding ACPI states.
Table 5-22. General Power States for Systems Using the PCH
State/
Substates Legacy Name / Description
G0/S0/C0 Full On: Processor operating. Individual devices may be shut down or be placed
into lower power states to save power.
G0/S0/Cx
Cx State: Cx states are processor power states within the S0 system state that
provide for various levels of power savings. The processor initiates C-state entry
and exit while interacting with the PCH. The PCH will base its behavior on the
processor state.
G1/S1 S1: The PCH provides the S1 messages and the S0 messages on a wake event.
It is preferred for systems to use C-states than S1.
G1/S3
Suspend-To-RAM (STR): The system context is maintained in system DRAM,
but power is shut off to non-critical circuits. Memory is retained and refreshes
continue. All external clocks stop except RTC.
G1/S4 Suspend-To-Disk (STD): The context of the system is maintained on the disk.
All power is then shut off to the system except for the logic required to resume.
G2/S5 Soft Off (SOFF): System context is not maintained. All power is shut off except
for the logic required to restart. A full boot is required when waking.
G3
Mechanical OFF (MOFF): System context not maintained. All power is shut off
except for the RTC. No “Wake” events are possible. This state occurs if the user
removes the main system batteries in a mobile system, turns off a mechanical
switch, or if the system power supply is at a level that is insufficient to power the
“waking” logic. When system power returns, transition will depend on the state
just prior to the entry to G3 and the AFTERG3_EN bit in the GEN_PMCON3
register (D31:F0, offset A4). See Table 5-28 for more details.
Functional Description
172 Datasheet
Table 5-23 shows the transitions rules among the various states. Note that transitions
among the various states may appear to temporarily transition through intermediate
states. For example, in going from S0 to S3, it may appear to pass through the G1/S1
states. These intermediate transitions and states are not listed in the table.
NOTES:
1. Some wake events can be preserved through power failure.
2. Transitions from the S1–S5 or G3 states to the S0 state are deferred until BATLOW# is
inactive in mobile configurations.
Table 5-23. State Transition Rules for the PCH
Present
State Transition Trigger Next State
G0/S0/C0
•DMI Msg
•SLP_EN bit set
Power Button Override
Mechanical Off/Power Failure
•G0/S0/Cx
•G1/Sx or G2/S5 state
•G2/S5
•G3
G0/S0/Cx
•DMI Msg
Power Button Override
Mechanical Off/Power Failure
•G0/S0/C0
•S5
•G3
G1/S1,
G1/S3, or
G1/S4
Any Enabled Wake Event
Power Button Override
Mechanical Off/Power Failure
G0/S0/C0 (See Note 2)
•G2/S5
•G3
G2/S5 Any Enabled Wake Event
Mechanical Off/Power Failure
G0/S0/C0 (See Note 2)
•G3
G3 Power Returns
Optional to go to S0/C0 (reboot) or G2/
S5 (stay off until power button pressed
or other wake event). (See Notes 1 and
2)
Datasheet 173
Functional Description
5.13.3 System Power Planes
The system has several independent power planes, as described in Table 5-24. Note
that when a particular power plane is shut off, it should go to a 0 V level.
s
5.13.4 SMI#/SCI Generation
Upon any enabled SMI event taking place while the End of SMI (EOS) bit is set, the PCH
will clear the EOS bit and assert SMI to the processor, which will cause it to enter SMM
space. SMI assertion is performed using a Virtual Legacy Wire (VLW) message. Prior
system generations (those based upon legacy processors) used an actual SMI# pin.
Once the SMI VLW has been delivered, the PCH takes no action on behalf of active SMI
events until Host software sets the End of SMI (EOS) bit. At that point, if any SMI
events are still active, the PCH will send another SMI VLW message.
The SCI is a level-mode interrupt that is typically handled by an ACPI-aware operating
system. In non-APIC systems (which is the default), the SCI IRQ is routed to one of the
8259 interrupts (IRQ 9, 10, or 11). The 8259 interrupt controller must be programmed
to level mode for that interrupt.
Table 5-24. System Power Plane
Plane Controlled By Description
CPU SLP_S3# signal The SLP_S3# signal can be used to cut the power to the
processor completely.
MAIN SLP_S3# signal
When SLP_S3# goes active, power can be shut off to any circuit
not required to wake the system from the S3 state. Since the S3
state requires that the memory context be preserved, power
must be retained to the main memory.
The processor, devices on the PCI bus, LPC I/F, and graphics will
typically be shut off when the Main power plane is off, although
there may be small subsections powered.
MEMORY SLP_S4# signal
SLP_S5# signal
When SLP_S4# goes active, power can be shut off to any circuit
not required to wake the system from the S4. Since the memory
context does not need to be preserved in the S4 state, the power
to the memory can also be shut down.
When SLP_S5# goes active, power can be shut off to any circuit
not required to wake the system from the S5 state. Since the
memory context does not need to be preserved in the S5 state,
the power to the memory can also be shut.
ME SLP_M#
This pin is asserted when the manageability platform goes to
MOff. Depending on the platform, this pin may be used to control
the Management Engine power planes, the clock chip power, LAN
subsystem power, and the SPI flash power.
LAN SLP_LAN#
This signal is asserted in Sx/Moff when both host and Intel® ME
WOL are not supported. This signal can be use to control power
to the Intel 82567 GbE PHY and depending on platform design
may also control power to VccME3_3.
DEVICE[n] Implementation
Specific
Individual subsystems may have their own power plane. For
example, GPIO signals may be used to control the power to disk
drives, audio amplifiers, or the display screen.
Functional Description
174 Datasheet
In systems using the APIC, the SCI can be routed to interrupts 9, 10, 11, 20, 21, 22, or
23. The interrupt polarity changes depending on whether it is on an interrupt shareable
with a PIRQ or not (see Section 13.1.3). The interrupt remains asserted until all SCI
sources are removed.
Table 5-25 shows which events can cause an SMI and SCI. Note that some events can
be programmed to cause either an SMI or SCI. The usage of the event for SCI (instead
of SMI) is typically associated with an ACPI-based system. Each SMI or SCI source has
a corresponding enable and status bit.
Table 5-25. Causes of SMI and SCI (Sheet 1 of 2)
Cause SCI SMI Additional Enables Where Reported
PME# Yes Yes PME_EN=1 PME_STS
PME_B0 (Internal, Bus 0, PME-
Capable Agents) Yes Yes PME_B0_EN=1 PME_B0_STS
PCI Express* PME Messages Yes Yes PCI_EXP_EN=1
(Not enabled for SMI) PCI_EXP_STS
PCI Express Hot Plug Message Yes Yes HOT_PLUG_EN=1
(Not enabled for SMI) HOT_PLUG_STS
Power Button Press Yes Yes PWRBTN_EN=1 PWRBTN_STS
Power Button Override (Note 7) Yes No None PRBTNOR_STS
RTC Alarm Yes Yes RTC_EN=1 RTC_STS
Ring Indicate Yes Yes RI_EN=1 RI_STS
USB#1 wakes Yes Yes USB1_EN=1 USB1_STS
USB#2 wakes Yes Yes USB2_EN=1 USB2_STS
USB#3 wakes Yes Yes USB3_EN=1 USB3_STS
USB#4 wakes Yes Yes USB4_EN=1 USB4_STS
USB#5 wakes Yes Yes USB5_EN=1 USB5_STS
USB#6 wakes Yes Yes USB6_EN=1 USB6_STS
USB#7 wakes Yes Yes USB7_EN=1 USB7_STS
ACPI Timer overflow
(2.34 sec.) Yes Yes TMROF_EN=1 TMROF_STS
Any GPI[15:0] Yes Yes
GPI[x]_Route=10;
GPI[x]_EN=1
(SCI)
GPI[x]_Route=01;
ALT_GPI_SMI[x]_EN=1
(SMI)
GPI[x]_STS
ALT_GPI_SMI[x]_STS
GPIO[27] Yes Yes GP27_EN=1 GP27_STS
TCO SCI Logic Yes No TCOSCI_EN=1 TCOSCI_STS
TCO SCI message from CPU Yes No none CPUSCI_STS
TCO SMI Logic No Yes TCO_EN=1 TCO_STS
TCO SMIYear 2000 Rollover No Yes none NEWCENTURY_STS
TCO SMI—TCO TIMEROUT No Yes none TIMEOUT
TCO SMI—OS writes to
TCO_DAT_IN register No Yes none OS_TCO_SMI
TCO SMI—Message from CPU No Yes none CPUSMI_STS
TCO SMI—NMI occurred (and
NMIs mapped to SMI) No Yes NMI2SMI_EN=1 NMI2SMI_STS
Datasheet 175
Functional Description
NOTES:
1. SCI_EN must be 1 to enable SCI, except for BIOS_RLS. SCI_EN must be 0 to enable SMI.
2. SCI can be routed to cause interrupt 9:11 or 20:23 (20:23 only available in APIC mode).
3. GBL_SMI_EN must be 1 to enable SMI.
4. EOS must be written to 1 to re-enable SMI for the next 1.
5. The PCH must have SMI fully enabled when the PCH is also enabled to trap cycles. If SMI is
not enabled in conjunction with the trap enabling, then hardware behavior is undefined.
6. Only GPI[15:0] may generate an SMI or SCI.
7. When a power button override first occurs, the system will transition immediately to S5.
The SCI will only occur after the next wake to S0 if the residual status bit (PRBTNOR_STS)
is not cleared prior to setting SCI_EN.
8. GBL_STS being set will cause an SCI, even if the SCI_EN bit is not set. Software must take
great care not to set the BIOS_RLS bit (which causes GBL_STS to be set) if the SCI
handler is not in place.
TCO SMI—INTRUDER# signal
goes active No Yes INTRD_SEL=10 INTRD_DET
TCO SMI—Change of the
BIOSWE (D31:F0:DCh, bit 0)
bit from 0 to 1
No Yes BLE=1 BIOSWR_STS
TCO SMI—Write attempted to
BIOS No Yes BIOSWE=1 BIOSWR_STS
BIOS_RLS written to Yes No GBL_EN=1 GBL_STS
GBL_RLS written to No Yes BIOS_EN=1 BIOS_STS
Write to B2h register No Yes APMC_EN = 1 APM_STS
Periodic timer expires No Yes PERIODIC_EN=1 PERIODIC_STS
64 ms timer expires No Yes SWSMI_TMR_EN=1 SWSMI_TMR_STS
Enhanced USB Legacy Support
Event No Yes LEGACY_USB2_EN = 1 LEGACY_USB2_STS
Enhanced USB Intel Specific
Event No Yes INTEL_USB2_EN = 1 INTEL_USB2_STS
Serial IRQ SMI reported No Yes none SERIRQ_SMI_STS
Device monitors match address
in its range No Yes none DEVTRAP_STS
SMBus Host Controller No Yes SMB_SMI_EN
Host Controller Enabled SMBus host status reg.
SMBus Slave SMI message No Yes none SMBUS_SMI_STS
SMBus SMBALERT# signal
active No Yes none SMBUS_SMI_STS
SMBus Host Notify message
received No Yes HOST_NOTIFY_INTREN SMBUS_SMI_STS
HOST_NOTIFY_STS
(Mobile Only) BATLOW#
assertion Yes Yes BATLOW_EN=1 BATLOW_STS
Access microcontroller 62h/66h No Yes MCSMI_EN MCSMI_STS
SLP_EN bit written to 1 No Yes SMI_ON_SLP_EN=1 SMI_ON_SLP_EN_STS
SPI Command Completed No Yes None SPI_SMI_STS
Software Generated GPE Yes Yes SWGPE=1 SWGPE_STS
USB Per-Port Registers Write
Enable bit changes to 1 No Yes USB2_EN=1,
Write_Enable_SMI_Enable=1
USB2_STS, Write Enable
Status
GPIO Lockdown Enable bit
changes from ‘1’ to ‘0’ No Yes GPIO_UNLOCK_SMI_EN=1 GPIO_UNLOCK_SMI_STS
Table 5-25. Causes of SMI and SCI (Sheet 2 of 2)
Cause SCI SMI Additional Enables Where Reported
Functional Description
176 Datasheet
5.13.4.1 PCI Express* SCI
PCI Express ports and the processor (using DMI) have the ability to cause PME using
messages. When a PME message is received, the PCH will set the PCI_EXP_STS bit. If
the PCI_EXP_EN bit is also set, the PCH can cause an SCI using the GPE1_STS register.
5.13.4.2 PCI Express* Hot-Plug
PCI Express has a Hot-Plug mechanism and is capable of generating a SCI using the
GPE1 register. It is also capable of generating an SMI. However, it is not capable of
generating a wake event.
5.13.5 C-States
PCH-based systems implement C-states by having the processor control the states. The
chipset exchanges messages with the processor as part of the C-state flow, but the
chipset no longer directly controls any of the processor impacts of C-states, such as
voltage levels or processor clocking. In addition to the new messages, the PCH also
provides additional information to the processor using a sideband pin (PM_SYNC). All of
the legacy C-state related pins (STPCLK#, STP_CPU#, DPRSLP#, DPRSLPVR#, etc.) do
not exist on the PCH.
5.13.6 Dynamic PCI Clock Control (Mobile Only)
The PCI clock can be dynamically controlled independent of any other low-power state.
This control is accomplished using the CLKRUN# protocol as described in the PCI Mobile
Design Guide, and is transparent to software.
The Dynamic PCI Clock control is handled using the following signals:
CLKRUN#: Used by PCI and LPC peripherals to request the system PCI clock to run
STP_PCI#: Used to stop the system PCI clock
Note: The 33 MHz clock to the PCH is “free-running” and is not affected by the STP_PCI#
signal.
Note: STP_PCI# is only used if PCI/LPC clocks are distributed from clock synthesizer rather
than PCH.
Datasheet 177
Functional Description
5.13.6.1 Conditions for Checking the PCI Clock
When there is a lack of PCI activity the PCH has the capability to stop the PCI clocks to
conserve power. “PCI activity” is defined as any activity that would require the PCI
clock to be running.
Any of the following conditions will indicate that it is not okay to stop the PCI clock:
•Cycles on PCI or LPC
Cycles of any internal device that would need to go on the PCI bus
SERIRQ activity
Behavioral Description
When there is a lack of activity (as defined above) for 29 PCI clocks, the PCH de-
asserts (drive high) CLKRUN# for 1 clock and then tri-states the signal.
5.13.6.2 Conditions for Maintaining the PCI Clock
PCI masters or LPC devices that wish to maintain the PCI clock running will observe the
CLKRUN# signal de-asserted, and then must re-assert if (drive it low) within 3 clocks.
When the PCH has tri-stated the CLKRUN# signal after de-asserting it, the PCH
then checks to see if the signal has been re-asserted (externally).
After observing the CLKRUN# signal asserted for 1 clock, the PCH again starts
asserting the signal.
If an internal device needs the PCI bus, the PCH asserts the CLKRUN# signal.
5.13.6.3 Conditions for Stopping the PCI Clock
If no device re-asserts CLKRUN# once it has been de-asserted for at least 6 clocks,
the PCH stops the PCI clock by asserting the STP_PCI# signal to the clock
synthesizer.
For case when PCH distribute PCI clock, PCH stop PCI clocks without the
involvement of STP_PCI#.
5.13.6.4 Conditions for Re-Starting the PCI Clock
A peripheral asserts CLKRUN# to indicate that it needs the PCI clock re-started.
When the PCH observes the CLKRUN# signal asserted for 1 (free running) clock,
the PCH de-asserts the STP_PCI# signal to the clock synthesizer within 4 (free
running) clocks.
Observing the CLKRUN# signal asserted externally for 1 (free running) clock, the
PCH again starts driving CLKRUN# asserted.
If an internal source requests the clock to be re-started, the PCH re-asserts CLKRUN#,
and simultaneously de-asserts the STP_PCI# signal. For case when PCH distribute PCI
clock, PCH start PCI clocks without the involvement of STP_PCI#.
Functional Description
178 Datasheet
5.13.6.5 LPC Devices and CLKRUN#
If an LPC device (of any type) needs the 33 MHz PCI clock, such as for LPC DMA or LPC
serial interrupt, then it can assert CLKRUN#. Note that LPC devices running DMA or bus
master cycles will not need to assert CLKRUN#, since the PCH asserts it on their behalf.
The LDRQ# inputs are ignored by the PCH when the PCI clock is stopped to the LPC
devices to avoid misinterpreting the request. The PCH assumes that only one more
rising PCI clock edge occurs at the LPC device after the assertion of STP_PCI#. Upon
de-assertion of STP_PCI#, the PCH assumes that the LPC device receives its first clock
rising edge corresponding to the PCH’s second PCI clock rising edge after the de-
assertion.
5.13.7 Sleep States
5.13.7.1 Sleep State Overview
The PCH directly supports different sleep states (S1–S5), which are entered by
methods such as setting the SLP_EN bit or due to a Power Button press. The entry to
the Sleep states is based on several assumptions:
The G3 state cannot be entered using any software mechanism. The G3 state
indicates a complete loss of power.
5.13.7.2 Initiating Sleep State
Sleep states (S1–S5) are initiated by:
Masking interrupts, turning off all bus master enable bits, setting the desired type
in the SLP_TYP field, and then setting the SLP_EN bit. The hardware then attempts
to gracefully put the system into the corresponding Sleep state.
Pressing the PWRBTN# Signal for more than 4 seconds to cause a Power Button
Override event. In this case the transition to the S5 state is less graceful, since
there are no dependencies on DMI messages from the processor or on clocks other
than the RTC clock.
Assertion of the THRMTRIP# signal will cause a transition to the S5 state. This can
occur when system is in S0 or S1 state.
Shutdown by integrated manageability functions (ASF/Intel® AMT).
Internal watchdog timer timeout events.
Table 5-26. Sleep Types
Sleep Type Comment
S1 System lowers the processor’s power consumption. No snooping is possible in this
state.
S3
The PCH asserts SLP_S3#. The SLP_S3# signal controls the power to non-critical
circuits. Power is only retained to devices needed to wake from this sleeping
state, as well as to the memory.
S4
The PCH asserts SLP_S3# and SLP_S4#. The SLP_S4# signal shuts off the power
to the memory subsystem. Only devices needed to wake from this state should be
powered.
S5 The PCH asserts SLP_S3#, SLP_S4# and SLP_S5#.
Datasheet 179
Functional Description
5.13.7.3 Exiting Sleep States
Sleep states (S1–S5) are exited based on Wake events. The Wake events forces the
system to a full on state (S0), although some non-critical subsystems might still be
shut off and have to be brought back manually. For example, the hard disk may be shut
off during a sleep state and have to be enabled using a GPIO pin before it can be used.
Upon exit from the PCH-controlled Sleep states, the WAK_STS bit is set. The possible
causes of Wake Events (and their restrictions) are shown in Table 5-27.
Note: (Mobile Only) If the BATLOW# signal is asserted, the PCH does not attempt to wake
from an S1–S5 state, even if the power button is pressed. This prevents the system
from waking when the battery power is insufficient to wake the system. Wake events
that occur while BATLOW# is asserted are latched by the PCH, and the system wakes
after BATLOW# is de-asserted.
Table 5-27 Causes of Wake Events (Sheet 1 of 2)
Cause How Enabled Wake from
S1, Sx
Wake from
S1, Sx After
Power Loss
(Note 1)
Wake from
“Reset”
Types
(Note 2)
RTC Alarm Set RTC_EN bit in PM1_EN register. Y Y
Power Button Always enabled as Wake event. Y Y Y
GPI[15:0]
GPE0_EN register
Note: GPIs that are in the core well
are not capable of waking the system
from sleep states when the core well
is not powered.
Y
GPIO27 Set GP27_EN in GPE0_EN Register. Y Y Y
LAN Will use PME#. Wake enable set with
LAN logic. YY
RI# Set RI_EN bit in GPE0_EN register. Y Y
Intel® High
Definition
Audio
Event sets PME_B0_STS bit;
PM_B0_EN must be enabled. Can not
wake from S5 state if it was entered
due to power failure or power button
override.
YY
Primary PME# PME_B0_EN bit in GPE0_EN register. Y Y
Secondary
PME# Set PME_EN bit in GPE0_EN register. Y Y
PCI_EXP_WA
KE# PCI_EXP_WAKE bit. (Note 3) Y Y
SATA
Set PME_EN bit in GPE0_EN register.
(Note 4) S1 S1
PCI_EXP PME
Message
Must use the PCI Express* WAKE#
pin rather than messages for wake
from S3, S4, or S5.
S1 S1
SMBALERT# Always enabled as Wake event. Y Y Y
Functional Description
180 Datasheet
NOTES:
1. This column represents what the PCH would honor as wake events but there may be
enabling dependencies on the device side which are not enabled after a power loss.
2. Reset Types include: Power Button override, Intel ME initiated power button override, Intel
ME initiated host partition reset with power down, Intel ME Watchdog Timer, SMBus
unconditional power down, Processor thermal trip, PCH catastrophic temperature event.
3. When the WAKE# pin is active and the PCI Express device is enabled to wake the system,
the PCH will wake the platform.
4. SATA can only trigger a wake event in S1, but if PME is asserted prior to S3/S4/S5 entry
and software does not clear the PME_B0_STS, a wake event would still result.
It is important to understand that the various GPIs have different levels of functionality
when used as wake events. The GPIs that reside in the core power well can only
generate wake events from sleep states where the core well is powered. Also, only
certain GPIs are “ACPI Compliant,” meaning that their Status and Enable bits reside in
ACPI I/O space. Table 5-27 summarizes the use of GPIs as wake events.
The latency to exit the various Sleep states varies greatly and is heavily dependent on
power supply design, so much so that the exit latencies due to the PCH are
insignificant.
SMBus Slave
Wake
Message
(01h)
Wake/SMI# command always
enabled as a Wake event.
Note: SMBus Slave Message can
wake the system from S1–S5, as well
as from S5 due to Power Button
Override.
YYY
SMBus Host
Notify
message
received
HOST_NOTIFY_WKEN bit SMBus
Slave Command register. Reported in
the SMB_WAK_STS bit in the
GPEO_STS register.
YYY
Intel® ME
Non-Maskable
Wake
Always enabled as a wake event. Y Y Y
Integrated
WOL Enable
Override
WOL Enable Override bit (in
Configuration Space). Y Y Y
Table 5-27 Causes of Wake Events (Sheet 2 of 2)
Cause How Enabled Wake from
S1, Sx
Wake from
S1, Sx After
Power Loss
(Note 1)
Wake from
“Reset”
Types
(Note 2)
Table 5-27. GPI Wake Events
GPI Power Well Wake From Notes
GPI[7:0] Core S1 ACPI Compliant
GPI[15:8] Suspend S1–S5 ACPI Compliant
Datasheet 181
Functional Description
5.13.7.4 PCI Express* WAKE# Signal and PME Event Message
PCI Express ports can wake the platform from any sleep state (S1, S3, S4, or S5) using
the WAKE# pin. WAKE# is treated as a wake event, but does not cause any bits to go
active in the GPE_STS register.
PCI Express ports and the processor (using DMI) have the ability to cause PME using
messages. When a PME message is received, the PCH will set the PCI_EXP_STS bit.
5.13.7.5 Sx-G3-Sx, Handling Power Failures
Depending on when the power failure occurs and how the system is designed, different
transitions could occur due to a power failure.
The AFTERG3_EN bit provides the ability to program whether or not the system should
boot once power returns after a power loss event. If the policy is to not boot, the
system remains in an S5 state (unless previously in S4). There are only three possible
events that will wake the system after a power failure.
1. PWRBTN#: PWRBTN# is always enabled as a wake event. When RSMRST# is low
(G3 state), the PWRBTN_STS bit is reset. When the PCH exits G3 after power
returns (RSMRST# goes high), the PWRBTN# signal is already high (because VCC-
standby goes high before RSMRST# goes high) and the PWRBTN_STS bit is 0.
2. RI#: RI# does not have an internal pull-up. Therefore, if this signal is enabled as a
wake event, it is important to keep this signal powered during the power loss
event. If this signal goes low (active), when power returns the RI_STS bit is set and
the system interprets that as a wake event.
3. RTC Alarm: The RTC_EN bit is in the RTC well and is preserved after a power loss.
Like PWRBTN_STS the RTC_STS bit is cleared when RSMRST# goes low.
The PCH monitors both PCH PWROK and RSMRST# to detect for power failures. If PCH
PWROK goes low, the PWROK_FLR bit is set. If RSMRST# goes low, PWR_FLR is set.
Note: Although PME_EN is in the RTC well, this signal cannot wake the system after a power
loss. PME_EN is cleared by RTCRST#, and PME_STS is cleared by RSMRST#.
5.13.8 Event Input Signals and Their Usage
The PCH has various input signals that trigger specific events. This section describes
those signals and how they should be used.
Table 5-28. Transitions Due to Power Failure
State at Power Failure AFTERG3_EN bit Transition When Power Returns
S0, S1, S3 1
0
S5
S0
S4 1
0
S4
S0
S5 1
0
S5
S0
Functional Description
182 Datasheet
5.13.8.1 PWRBTN# (Power Button)
The PCH PWRBTN# signal operates as a “Fixed Power Button” as described in the
Advanced Configuration and Power Interface, Version 2.0b. PWRBTN# signal has a 16
ms de-bounce on the input. The state transition descriptions are included in Table 5-29.
Note that the transitions start as soon as the PWRBTN# is pressed (but after the
debounce logic), and does not depend on when the Power Button is released.
Note: During the time that the SLP_S4# signal is stretched for the minimum assertion width
(if enabled), the Power Button is not a wake event. See Power Button Override Function
section below for further detail.
Power Button Override Function
If PWRBTN# is observed active for at least four consecutive seconds, the state machine
should unconditionally transition to the G2/S5 state, regardless of present state
(S0–S4), even if the PCH PWROK is not active. In this case, the transition to the G2/S5
state should not depend on any particular response from the processor (such as, a DMI
Messages), nor any similar dependency from any other subsystem.
The PWRBTN# status is readable to check if the button is currently being pressed or
has been released. The status is taken after the de-bounce, and is readable using the
PWRBTN_LVL bit.
Note: The 4-second PWRBTN# assertion should only be used if a system lock-up has
occurred. The 4-second timer starts counting when the PCH is in a S0 state. If the
PWRBTN# signal is asserted and held active when the system is in a suspend state
(S1–S5), the assertion causes a wake event. Once the system has resumed to the S0
state, the 4-second timer starts.
Note: During the time that the SLP_S4# signal is stretched for the minimum assertion width
(if enabled by D31:F0:A4h bit 3), the Power Button is not a wake event. As a result, it
is conceivable that the user will press and continue to hold the Power Button waiting for
the system to awake. Since a 4-second press of the Power Button is already defined as
an Unconditional Power down, the power button timer will be forced to inactive while
the power-cycle timer is in progress. Once the power-cycle timer has expired, the
Power Button awakes the system. Once the minimum SLP_S4# power cycle expires,
the Power Button must be pressed for another 4 to 5 seconds to create the Override
condition to S5.
Table 5-29. Transitions Due to Power Button
Present
State Event Transition/Action Comment
S0/Cx PWRBTN# goes low
SMI or SCI generated
(depending on SCI_EN,
PWRBTN_EN and
GLB_SMI_EN)
Software typically initiates a
Sleep state
S1–S5 PWRBTN# goes low Wake Event. Transitions to
S0 state Standard wakeup
G3 PWRBTN# pressed None No effect since no power
Not latched nor detected
S0–S4
PWRBTN# held low
for at least 4
consecutive seconds
Unconditional transition to
S5 state
No dependence on processor
(DMI Messages) or any other
subsystem
Datasheet 183
Functional Description
Sleep Button
The Advanced Configuration and Power Interface, Version 2.0b defines an optional
Sleep button. It differs from the power button in that it only is a request to go from S0
to S1–S4 (not S5). Also, in an S5 state, the Power Button can wake the system, but the
Sleep Button cannot.
Although the PCH does not include a specific signal designated as a Sleep Button, one
of the GPIO signals can be used to create a “Control Method” Sleep Button. See the
Advanced Configuration and Power Interface, Version 2.0b for implementation details.
5.13.8.2 RI# (Ring Indicator)
The Ring Indicator can cause a wake event (if enabled) from the S1–S5 states.
Table 5-30 shows when the wake event is generated or ignored in different states. If in
the G0/S0/Cx states, the PCH generates an interrupt based on RI# active, and the
interrupt will be set up as a Break event.
Note: Filtering/Debounce on RI# will not be done in PCH. Can be in modem or external.
5.13.8.3 PME# (PCI Power Management Event)
The PME# signal comes from a PCI device to request that the system be restarted. The
PME# signal can generate an SMI#, SCI, or optionally a Wake event. The event occurs
when the PME# signal goes from high to low. No event is caused when it goes from low
to high.
There is also an internal PME_B0 bit. This is separate from the external PME# signal
and can cause the same effect.
5.13.8.4 SYS_RESET# Signal
When the SYS_RESET# pin is detected as active after the 16 ms debounce logic, the
PCH attempts to perform a “graceful” reset, by waiting up to 25 ms for the SMBus to go
idle. If the SMBus is idle when the pin is detected active, the reset occurs immediately;
otherwise, the counter starts. If at any point during the count the SMBus goes idle the
reset occurs. If, however, the counter expires and the SMBus is still active, a reset is
forced upon the system even though activity is still occurring.
Once the reset is asserted, it remains asserted for 5 to 6 ms regardless of whether the
SYS_RESET# input remains asserted or not. It cannot occur again until SYS_RESET#
has been detected inactive after the debounce logic, and the system is back to a full S0
state with PLTRST# inactive. Note that if bit 3 of the CF9h I/O register is set then
SYS_RESET# will result in a full power cycle reset.
5.13.8.5 THRMTRIP# Signal
If THRMTRIP# goes active, the processor is indicating an overheat condition, and the
PCH immediately transitions to an S5 state, driving SLP_S3#, SLP_S4#, SLP_S5# low,
and setting the CTS bit. The transition looks like a power button override.
Table 5-30. Transitions Due to RI# Signal
Present State Event RI_EN Event
S0 RI# Active X Ignored
S1–S5 RI# Active 0
1
Ignored
Wake Event
Functional Description
184 Datasheet
When a THRMTRIP# event occurs, the PCH will power down immediately without
following the normal S0 -> S5 path. The PCH will immediately drive SLP_S3#,
SLP_S4#, and SLP_S5# low after sampling THRMTRIP# active.
If the processor is running extremely hot and is heating up, it is possible (although very
unlikely) that components around it, such as the PCH, are no longer executing cycles
properly. Therefore, if THRMTRIP# goes active, and the PCH is relying on state machine
logic to perform the power down, the state machine may not be working, and the
system will not power down.
The PCH provides filtering for short low glitches on the THRMTRIP# signal to prevent
erroneous system shut downs from noise. Glitches shorter than 25 nsec are ignored.
During boot, THRMTRIP# is ignored until SLP_S3#, PWROK, and PLTRST# are all ‘1’.
During entry into a powered-down state (due to S3, S4, S5 entry, power cycle reset,
etc.) THRMTRIP# is ignored until either SLP_S3# = 0, or PCH PWROK = 0, or
SYS_PWROK = 0.
Note: A thermal trip event will:
Clear the PWRBTN_STS bit
Clear all the GPE0_EN register bits
Clear the SMB_WAK_STS bit only if SMB_SAK_STS was set due to SMBus slave
receiving message and not set due to SMBAlert
5.13.9 ALT Access Mode
Before entering a low power state, several registers from powered down parts may
need to be saved. In the majority of cases, this is not an issue, as registers have read
and write paths. However, several of the ISA compatible registers are either read only
or write only. To get data out of write-only registers, and to restore data into read-only
registers, the PCH implements an ALT access mode.
If the ALT access mode is entered and exited after reading the registers of the PCH
timer (8254), the timer starts counting faster (13.5 ms). The following steps listed
below can cause problems:
1. BIOS enters ALT access mode for reading the PCH timer related registers.
2. BIOS exits ALT access mode.
3. BIOS continues through the execution of other needed steps and passes control to
the operating system.
After getting control in step #3, if the operating system does not reprogram the system
timer again, the timer ticks may be happening faster than expected. For example
Microsoft MS-DOS* and its associated software assume that the system timer is
running at 54.6 ms and as a result the time-outs in the software may be happening
faster than expected.
Operating systems (such as, Microsoft Windows* 98 and Windows* 2000) reprogram
the system timer and therefore do not encounter this problem.
For other operating systems (such as, Microsoft MS-DOS*) the BIOS should restore the
timer back to 54.6 ms before passing control to the operating system. If the BIOS is
entering ALT access mode before entering the suspend state it is not necessary to
restore the timer contents after the exit from ALT access mode.
Datasheet 185
Functional Description
5.13.9.1 Write Only Registers with Read Paths in ALT Access Mode
The registers described in Table 5-31 have read paths in ALT access mode. The access
number field in the table indicates which register will be returned per access to that
port.
Table 5-31. Write Only Registers with Read Paths in ALT Access Mode (Sheet 1 of 2)
Restore Data Restore Data
I/O
Addr
# of
Rds Access Data I/O
Addr
# of
Rds Access Data
00h 2
1DMA Chan 0 base address
low byte
40h 7
1Timer Counter 0 status, bits
[5:0]
2DMA Chan 0 base address
high byte 2Timer Counter 0 base count
low byte
01h 2
1DMA Chan 0 base count low
byte 3Timer Counter 0 base count
high byte
2DMA Chan 0 base count high
byte 4Timer Counter 1 base count
low byte
02h 2
1DMA Chan 1 base address
low byte 5Timer Counter 1 base count
high byte
2DMA Chan 1 base address
high byte 6Timer Counter 2 base count
low byte
03h 2
1DMA Chan 1 base count low
byte 7Timer Counter 2 base count
high byte
2DMA Chan 1 base count high
byte 41h 1 Timer Counter 1 status, bits
[5:0]
04h 2
1DMA Chan 2 base address
low byte 42h 1 Timer Counter 2 status, bits
[5:0]
2DMA Chan 2 base address
high byte 70h 1 Bit 7 = NMI Enable,
Bits [6:0] = RTC Address
05h 2
1DMA Chan 2 base count low
byte C4h 2
1DMA Chan 5 base address
low byte
2DMA Chan 2 base count high
byte 2DMA Chan 5 base address
high byte
06h 2
1DMA Chan 3 base address
low byte C6h 2
1DMA Chan 5 base count low
byte
2DMA Chan 3 base address
high byte 2DMA Chan 5 base count
high byte
07h 2
1DMA Chan 3 base count low
byte C8h 2
1DMA Chan 6 base address
low byte
2DMA Chan 3 base count high
byte 2DMA Chan 6 base address
high byte
Functional Description
186 Datasheet
NOTES:
1. The OCW1 register must be read before entering ALT access mode.
2. Bits 5, 3, 1, and 0 return 0.
08h 6
1 DMA Chan 0–3 Command2
CAh 2
1DMA Chan 6 base count low
byte
2 DMA Chan 0–3 Request 2 DMA Chan 6 base count
high byte
3DMA Chan 0 Mode:
Bits(1:0) = 00 CCh 2
1DMA Chan 7 base address
low byte
4DMA Chan 1 Mode:
Bits(1:0) = 01 2DMA Chan 7 base address
high byte
5DMA Chan 2 Mode:
Bits(1:0) = 10 CEh 2
1DMA Chan 7 base count low
byte
6DMA Chan 3 Mode: Bits(1:0)
= 11. 2DMA Chan 7 base count
high byte
20h 12
1 PIC ICW2 of Master controller
D0h 6
1 DMA Chan 4–7 Command2
2 PIC ICW3 of Master controller 2 DMA Chan 4–7 Request
3 PIC ICW4 of Master controller 3 DMA Chan 4 Mode:
Bits(1:0) = 00
4PIC OCW1 of Master
controller14DMA Chan 5 Mode:
Bits(1:0) = 01
5PIC OCW2 of Master
controller 5DMA Chan 6 Mode:
Bits(1:0) = 10
6PIC OCW3 of Master
controller 6DMA Chan 7 Mode:
Bits(1:0) = 11.
7 PIC ICW2 of Slave controller
8 PIC ICW3 of Slave controller
9 PIC ICW4 of Slave controller
10 PIC OCW1 of Slave
controller1
11 PIC OCW2 of Slave controller
12 PIC OCW3 of Slave controller
Table 5-31. Write Only Registers with Read Paths in ALT Access Mode (Sheet 2 of 2)
Restore Data Restore Data
I/O
Addr
# of
Rds Access Data I/O
Addr
# of
Rds Access Data
Datasheet 187
Functional Description
5.13.9.2 PIC Reserved Bits
Many bits within the PIC are reserved, and must have certain values written for the PIC
to operate properly. Therefore, there is no need to return these values in ALT access
mode. When reading PIC registers from 20h and A0h, the reserved bits shall return the
values listed in Table 5-32.
5.13.9.3 Read Only Registers with Write Paths in ALT Access Mode
The registers described in Table 5-33 have write paths to them in ALT access mode.
Software restores these values after returning from a powered down state. These
registers must be handled special by software. When in normal mode, writing to the
base address/count register also writes to the current address/count register.
Therefore, the base address/count must be written first, then the part is put into ALT
access mode and the current address/count register is written.
5.13.10 System Power Supplies, Planes, and Signals
5.13.10.1 Power Plane Control with SLP_S3#,
SLP_S4#, SLP_S5#, SLP_M# and SLP_LAN#
The SLP_S3# output signal can be used to cut power to the system core supply, since it
only goes active for the Suspend-to-RAM state (typically mapped to ACPI S3). Power
must be maintained to the PCH suspend well, and to any other circuits that need to
generate Wake signals from the Suspend-to-RAM state. During S3 (Suspend-to-RAM)
all signals attached to powered down plans will be tri-stated or driven low, unless they
are pulled using a pull-up resistor.
Cutting power to the core may be done using the power supply, or by external FETs on
the motherboard.
The SLP_S4# or SLP_S5# output signal can be used to cut power to the system core
supply, as well as power to the system memory, since the context of the system is
saved on the disk. Cutting power to the memory may be done using the power supply,
or by external FETs on the motherboard.
Table 5-32. PIC Reserved Bits Return Values
PIC Reserved Bits Value Returned
ICW2(2:0) 000
ICW4(7:5) 000
ICW4(3:2) 00
ICW4(0) 0
OCW2(4:3) 00
OCW3(7) 0
OCW3(5) Reflects bit 6
OCW3(4:3) 01
Table 5-33. Register Write Accesses in ALT Access Mode
I/O Address Register Write Value
08h DMA Status Register for channels 0–3.
D0h DMA Status Register for channels 4–7.
Functional Description
188 Datasheet
The SLP_S4# output signal is used to remove power to additional subsystems that are
powered during SLP_S3#.
SLP_S5# output signal can be used to cut power to the system core supply, as well as
power to the system memory, since the context of the system is saved on the disk.
Cutting power to the memory may be done using the power supply, or by external FETs
on the motherboard.
SLP_M# output signal can be used to cut power to the Management Engine, Clock chip
and SPI flash on a platform that supports Intel® AMT.
SLP_LAN# output signal can be used to cut power to the external Intel 82567 GbE PHY
device. Depending on platform design SLP_LAN# may also be used to control power to
VccME3_3 if it is desired to always power the LAN and ME subsystems up and down
together.
5.13.10.2 SLP_S4# and Suspend-To-RAM Sequencing
The system memory suspend voltage regulator is controlled by the Glue logic. The
SLP_S4# signal should be used to remove power to system memory rather than the
SLP_S5# signal. The SLP_S4# logic in the PCH provides a mechanism to fully cycle the
power to the DRAM and/or detect if the power is not cycled for a minimum time.
Note: To use the minimum DRAM power-down feature that is enabled by the SLP_S4#
Assertion Stretch Enable bit (D31:F0:A4h bit 3), the DRAM power must be controlled
by the SLP_S4# signal.
5.13.10.3 PWROK Signal
When asserted, PWROK is an indication to the PCH that its core well power rails are
powered and stable. PWROK can be driven asynchronously. When PCH PWROK is low,
the PCH asynchronously asserts PLTRST#. PWROK must not glitch, even if RSMRST# is
low.
It is required that the power associated with PCI/PCIe have been valid for 99 ms prior
to PWROK assertion to comply with the 100 ms PCI 2.3 / PCIe 2.0 specification on
PLTRST# de-assertion.
Note: SYS_RESET# is recommended for implementing the system reset button. This saves
external logic that is needed if the PWROK input is used. Additionally, it allows for
better handling of the SMBus and processor resets and avoids improperly reporting
power failures.
5.13.10.4 BATLOW# (Battery Low) (Mobile Only)
The BATLOW# input can inhibit waking from S3, S4, and S5 states if there is not
sufficient power. It also causes an SMI if the system is already in an S0 state.
Datasheet 189
Functional Description
5.13.10.5 SLP_LAN# Pin Behavior
Table 5-34 summarizes SLP_LAN# pin behavior.
5.13.10.6 RTCRST# and SRTCRST#
RTCRST# is used to reset PCH registers in the RTC Well to their default value. If a
jumper is used on this pin, it should only be pulled low when system is in the G3 state
and then replaced to the default jumper position. Upon booting, BIOS should recognize
that RTCRST# was asserted and clear internal PCH registers accordingly. It is
imperative that this signal not be pulled low in the S0 to S5 states.
SRTCRST# is used to reset portions of the Intel Manageability Engine and should not be
connected to a jumper or button on the platform. The only time this signal gets
asserted (driven low in combination with RTCRST#) should be when the coin cell
battery is removed or not installed and the platform is in the G3 state. Pulling this
signal low independently (without RTCRST# also being driven low) may cause the
platform to enter an indeterminate state. Similar to RTCRST#, it is imperative that
SRTCRST# not be pulled low in the S0 to S5 states.
See Figure 2-2 which demonstrates the proper circuit connection of these pins.
5.13.11 Clock Generators
The clock generator is expected to provide the frequencies shown in Table 4- 1 .
Table 5-34. SLP_LAN# Pin Behavior
Pin
Functionality
(Determined by
soft strap)
SLP_LAN
Default Value
Bit
GPIO29 Input /
Output
(Determined by
GP_IO_SEL bit)
Pin Value In S0
or M3
Value in S3-S5/
Moff
SLP_LAN#
0 (Default)
In (Default) 1 0
Out 1
Depends on
GPIO29 output
data value
1
In (Default) 1 1
Out 1
Depends on
GPIO29 output
data value
GPIO29
0 (Default) In Z (tri-state) 0
1 In Z (tri-state) 1
N/A Out
Depends on
GPIO29 output
data value
Depends on
GPIO29 output
data value
Functional Description
190 Datasheet
5.13.12 Legacy Power Management Theory of Operation
Instead of relying on ACPI software, legacy power management uses BIOS and various
hardware mechanisms. The scheme relies on the concept of detecting when individual
subsystems are idle, detecting when the whole system is idle, and detecting when
accesses are attempted to idle subsystems.
However, the operating system is assumed to be at least APM enabled. Without APM
calls, there is no quick way to know when the system is idle between keystrokes. The
PCH does not support burst modes.
5.13.12.1 APM Power Management (Desktop Only)
The PCH has a timer that, when enabled by the 1MIN_EN bit in the SMI Control and
Enable register, generates an SMI once per minute. The SMI handler can check for
system activity by reading the DEVTRAP_STS register. If none of the system bits are
set, the SMI handler can increment a software counter. When the counter reaches a
sufficient number of consecutive minutes with no activity, the SMI handler can then put
the system into a lower power state.
If there is activity, various bits in the DEVTRAP_STS register will be set. Software clears
the bits by writing a 1 to the bit position.
The DEVTRAP_STS register allows for monitoring various internal devices, or Super I/O
devices (SP, PP, FDC) on LPC or PCI, keyboard controller accesses, or audio functions
on LPC or PCI. Other PCI activity can be monitored by checking the PCI interrupts.
5.13.12.2 Mobile APM Power Management (Mobile Only)
In mobile systems, there are additional requirements associated with device power
management. To handle this, the PCH has specific SMI traps available. The following
algorithm is used:
1. The periodic SMI timer checks if a device is idle for the require time. If so, it puts
the device into a low-power state and sets the associated SMI trap.
2. When software (not the SMI handler) attempts to access the device, a trap occurs
(the cycle doesn’t really go to the device and an SMI is generated).
3. The SMI handler turns on the device and turns off the trap.
4. The SMI handler exits with an I/O restart. This allows the original software to
continue.
5.13.13 Reset Behavior
When a reset is triggered, the PCH will send a warning message to the processor to
allow the processor to attempt to complete any outstanding memory cycles and put
memory into a safe state before the platform is reset. When the processor is ready, it
will send an acknowledge message to the PCH. Once the message is received the PCH
asserts PLTRST#.
The PCH does not require an acknowledge message from the processor to trigger
PLTRST#. A global reset will occur after 4 seconds if an acknowledge from the
processor is not received.
When the PCH causes a reset by asserting PLTRST# its output signals will go to their
reset states as defined in Chapter 3.
Datasheet 191
Functional Description
A reset in which the host platform is reset and PLTRST# is asserted is called a Host
Reset or Host Partition Reset. Depending on the trigger a host reset may also result in
power cycling see Table 5-37 for details. If a host reset is triggered and the PCH times
out before receiving an acknowledge message from the processor a Global Reset with
power cycle will occur.
A reset in which the host and Intel ME partitions of the platform are reset is called a
Global Reset. During a Global Reset, all PCH functionality is reset except RTC Power
Well backed information and Suspend well status, configuration, and functional logic for
controlling and reporting the reset. Intel ME and Host power back up after the power
cycle period.
Straight to S5 is another reset type where all power wells that are controlled by the
SLP_S3#, SLP_S4#, and SLP_A# pins, as well as SLP_S5# and SLP_LAN# (if pins are
not configured as GPIOs), are turned off. All PCH functionality is reset except RTC
Power Well backed information and Suspend well status, configuration, and functional
logic for controlling and reporting the reset. The host stays there until a valid wake
event occurs.
Table 5-35 shows the various reset triggers.
Table 5-35. Causes of Host and Global Resets (Sheet 1 of 2)
Trigger
Host Reset
without
Power Cycle1
Host Reset
with Power
Cycle2
Global Reset
with Power
Cycle3
Straight to S5
(Host Stays
there)
Write of 0Eh to CF9h Register when Global Reset Bit=0b No Yes No (Note 4)
Write of 06h to CF9h Register when Global Reset Bit=0b Yes No No (Note 4)
Write of 06h or 0Eh to CF9h Register when Global Reset
Bit=1b No No Yes
SYS_RESET# Asserted and CF9h Bit 3 = 0 Yes No No (Note 4)
SYS_RESET# Asserted and CF9h Bit 3 = 1 No Yes No (Note 4)
SMBus Slave Message received for Reset with Power
Cycle No Yes No (Note 4)
SMBus Slave Message received for Reset without Power
Cycle Yes No No (Note 4)
TCO Watchdog Timer reaches zero two times Yes No No (Note 4)
Power Failure: PWROK signal goes inactive in S0/S1 or
RSMRST# asserts No No Yes
SYS_PWROK Failure: SYS_PWROK signal goes inactive
in S0/S1 No No Yes
Processor Thermal Trip (THRMTRIP#) causes transition
to S5 and reset asserts No No No Yes
Power Button 4 second override causes transition to S5
and reset asserts No No No Yes
Special shutdown cycle from processor causes CF9h-like
PLTRST# and CF9h Global Reset Bit = 1 No No Yes
Special shutdown cycle from processor causes CF9h-like
PLTRST# and CF9h Global Reset Bit = 0 and Bit 3 = 1 No Yes No (Note 4)
Special shutdown cycle from processor causes CF9h-like
PLTRST# and CF9h Global Reset Bit = 0 and Bit 3 = 0 Yes No No (Note 4)
Intel® Management Engine Triggered Host Reset
without power cycle Yes No No (Note 4)
Intel Management Engine Triggered Host Reset with
power cycle No Yes No (Note 4)
Intel Management Engine Watchdog Timer Timeout No No No Yes
Intel Management Engine Triggered Global Reset No No Yes
Functional Description
192 Datasheet
NOTES:
1. The PCH drops this type of reset request if received while the system is in S3/S4/S5.
2. PCH does not drop this type of reset request if received while system is in a software-
entered S3/S4/S5 state. However, the PCH will perform the reset without executing the
RESET_WARN protocol in these states.
3. The PCH does not send warning message to processor, reset occurs without delay.
4. Trigger will result in Global Reset with power cycle if the acknowledge message is not
received by the PCH.
5. The PCH waits for enabled wake event to complete reset.
5.14 System Management (D31:F0)
The PCH provides various functions to make a system easier to manage and to lower
the Total Cost of Ownership (TCO) of the system. Features and functions can be
augmented using external A/D converters and GPIO, as well as an external
microcontroller.
The following features and functions are supported by the PCH:
Processor present detection
Detects if processor fails to fetch the first instruction after reset
Various Error detection (such as ECC Errors) indicated by host controller
Can generate SMI#, SCI, SERR, NMI, or TCO interrupt
Intruder Detect input
Can generate TCO interrupt or SMI# when the system cover is removed
INTRUDER# allowed to go active in any power state, including G3
Detection of bad BIOS Flash (FWH or Flash on SPI) programming
Detects if data on first read is FFh (indicates that BIOS flash is not
programmed)
Ability to hide a PCI device
Allows software to hide a PCI device in terms of configuration space through
the use of a device hide register (See Section 10.1.65)
Note: Voltage ID from the processor can be read using GPI signals.
Intel Management Engine Triggered Host Reset with
power down (host stays there) No Yes (Note 5) No (Note 4)
PLTRST# Entry Time-out No No Yes
S3/4/5 Entry Timeout No No No Yes
PROCPWRGD Stuck Low No No Yes
Power Management Watchdog Timer No No No Yes
Intel Management Engine Hardware Uncorrectable Error No No No Yes
Table 5-35. Causes of Host and Global Resets (Sheet 2 of 2)
Trigger
Host Reset
without
Power Cycle1
Host Reset
with Power
Cycle2
Global Reset
with Power
Cycle3
Straight to S5
(Host Stays
there)
Datasheet 193
Functional Description
5.14.1 Theory of Operation
The System Management functions are designed to allow the system to diagnose failing
subsystems. The intent of this logic is that some of the system management
functionality can be provided without the aid of an external microcontroller.
5.14.1.1 Detecting a System Lockup
When the processor is reset, it is expected to fetch its first instruction. If the processor
fails to fetch the first instruction after reset, the TCO timer times out twice and the PCH
asserts PLTRST#.
5.14.1.2 Handling an Intruder
The PCH has an input signal, INTRUDER#, that can be attached to a switch that is
activated by the system’s case being open. This input has a two RTC clock debounce. If
INTRUDER# goes active (after the debouncer), this will set the INTRD_DET bit in the
TCO2_STS register. The INTRD_SEL bits in the TCO_CNT register can enable the PCH to
cause an SMI# or interrupt. The BIOS or interrupt handler can then cause a transition
to the S5 state by writing to the SLP_EN bit.
The software can also directly read the status of the INTRUDER# signal (high or low) by
clearing and then reading the INTRD_DET bit. This allows the signal to be used as a GPI
if the intruder function is not required.
If the INTRUDER# signal goes inactive some point after the INTRD_DET bit is written
as a 1, then the INTRD_DET signal will go to a 0 when INTRUDER# input signal goes
inactive. Note that this is slightly different than a classic sticky bit, since most sticky
bits would remain active indefinitely when the signal goes active and would
immediately go inactive when a 1 is written to the bit.
Note: The INTRD_DET bit resides in the PCH’s RTC well, and is set and cleared synchronously
with the RTC clock. Thus, when software attempts to clear INTRD_DET (by writing a 1
to the bit location) there may be as much as two RTC clocks (about 65 µs) delay before
the bit is actually cleared. Also, the INTRUDER# signal should be asserted for a
minimum of 1 ms to ensure that the INTRD_DET bit will be set.
Note: If the INTRUDER# signal is still active when software attempts to clear the INTRD_DET
bit, the bit remains set and the SMI is generated again immediately. The SMI handler
can clear the INTRD_SEL bits to avoid further SMIs. However, if the INTRUDER# signal
goes inactive and then active again, there will not be further SMIs, since the
INTRD_SEL bits would select that no SMI# be generated.
5.14.1.3 Detecting Improper Flash Programming
The PCH can detect the case where the BIOS flash is not programmed. This results in
the first instruction fetched to have a value of FFh. If this occurs, the PCH sets the
BAD_BIOS bit. The BIOS flash may reside in FWH or flash on the SPI bus.
5.14.1.4 Heartbeat and Event Reporting using SMLink/SMBus
Heartbeat and event reporting using SMLink/SMBus is no longer supported. The AMT
logic in PCH can be programmed to generate an interrupt to the Management Engine
when an event occurs. The Management Engine will poll the TCO registers to gather
appropriate bits to send the event message to the Gigabit Ethernet controller, if
Management Engine is programmed to do so.
Functional Description
194 Datasheet
5.14.2 TCO Modes
5.14.2.1 TCO Legacy/Compatible Mode
In TCO Legacy/Compatible mode, only the host SMBus is used. TCO Slave can be
connected to the host SMBus internally by setting the soft trap TCO Slave Select in the
flash descriptor. If a device has a single SMBus interface and needs access to the TCO
slave and be visible to the host SMBus controller, TCO slave needs to be configured to
be connected to the SMBus pins by the soft strap. In this mode, the Management
Engine SMBus controllers are not used and should be disabled by soft strap.
In TCO Legacy/Compatible mode the PCH can function directly with an external LAN
controller or equivalent external LAN controller to report messages to a network
management console without the aid of the system processor. This is crucial in cases
where the processor is malfunctioning or cannot function due to being in a low-power
state. Table 5-36 includes a list of events that will report messages to the network
management console.
Figure 5-5. TCO Legacy/Compatible Mode SMBus Configuration
Host SMBus
TCO Slave
SPD
(Slave) uCtrl
Legacy Sensors
(Master or Slave
with ALERT)
TCO Legacy/Compatible Mode
SMBus
X
Intel ME SMBus
Controller 3 X
X
PCI/PCIe*
Device
3rd Party
NIC
PCH
Intel ME SMBus
Controller 1
Intel ME SMBus
Controller 2
Datasheet 195
Functional Description
NOTE: The GPIO11/SMBALERT# pin will trigger an event message (when enabled by the
GPIO11_ALERT_DISABLE bit) regardless of whether it is configured as a GPI or not.
5.14.2.2 Advanced TCO Mode
The PCH supports the Advanced TCO mode in which SMLink0 and SMLink1 are used in
addition to the host SMBus. See Figure 5-6 for more details. In this mode, the Intel ME
SMBus controllers must be enabled by soft strap in the flash descriptor.
The SMLink0 is dedicated to integrated LAN use and when an Intel PHY 82579 is
connected to SMLink0, a soft strap must be set to indicate that the PHY is connected to
SMLink0. The interface will be running at the frequency of 300 KHz - 400 KHz
depending on different factors such as board routing or bus loading when the Fast Mode
is enabled via a soft strap (See SPI Flash Programming Guide Application Note for more
detail).
When an Intel PHY 82577 or 82578 is connected to SMLink0, a soft strap must be set to
indicate that the PHY is connected to SMLink0.
In the case where a BMC is connected to SMLink1, the BMC communicates with
Management Engine through Intel ME SMBus connected to SMLink1. The host and TCO
slave communicated with BMC through SMBus.
Table 5-36. Event Transitions that Cause Messages
Event Assertion? de-assertion? Comments
INTRUDER# pin yes no Must be in “S1 or hung S0” state
THRM# pin yes yes
Must be in “S1 or hung S0” state. Note that
the THRM# pin is isolated when the core
power is off, thus preventing this event in
S3–S5.
Watchdog Timer
Expired yes no (NA) “S1 or hung S0” state entered
GPIO[11]/
SMBALERT# pin yes yes Must be in “S1 or hung S0” state
BATLOW# yes yes Must be in “S1 or hung S0” state
CPU_PWR_FLR yes no “S1 or hung S0” state entered
Functional Description
196 Datasheet
Figure 5-6. Advanced TCO Mode
Host SMBus
TCO Slave
SPD
(Slave)
Legacy Sensors
(Master or Slave
with ALERT)
Advanced TCO Mode
SMBus
SMLink0
Intel ME SMBus
Controller 3
EC or
BMC
Intel
82577 or
82578
SMLink1
PCH
Intel ME SMBus
Controller 2
Intel ME SMBus
Controller 1 PCI/PCIe*
Device
Datasheet 197
Functional Description
5.15 General Purpose I/O (D31:F0)
The PCH contains up to 72 General Purpose Input/Output (GPIO) signals. Each GPIO
can be configured as an input or output signal. The number of inputs and outputs
varies depending on the configuration. Below is a brief summary of new GPIO features.
Capability to mask Suspend well GPIOs from CF9h events configured using
GP_RST_SEL registers)
Added capability to program GPIO prior to switching to output
5.15.1 Power Wells
Some GPIOs exist in the suspend power plane. Care must be taken to make sure GPIO
signals are not driven high into powered-down planes. Some PCH GPIOs may be
connected to pins on devices that exist in the core well. If these GPIOs are outputs,
there is a danger that a loss of core power (PWROK low) or a Power Button Override
event results in the PCH driving a pin to a logic 1 to another device that is powered
down.
5.15.2 SMI# SCI and NMI Routing
The routing bits for GPIO[15:0] allow an input to be routed to SMI#, SCI, NMI or
neither. Note that a bit can be routed to either an SMI# or an SCI, but not both.
5.15.3 Triggering
GPIO[15:0] have “sticky” bits on the input. See the GPE0_STS register and the
ALT_GPI_SMI_STS register. As long as the signal goes active for at least 2 clock cycles,
the PCH keeps the sticky status bit active. The active level can be selected in the
GP_INV register. This does not apply to GPI_NMI_STS residing in GPIO IO space.
If the system is in an S0 or an S1 state, the GPI inputs are sampled at 33 MHz, so the
signal only needs to be active for about 60 ns to be latched. In the S3–S5 states, the
GPI inputs are sampled at 32.768 kHz, and thus must be active for at least 61
microseconds to be latched.
Note: GPIs that are in the core well are not capable of waking the system from sleep states
where the core well is not powered.
If the input signal is still active when the latch is cleared, it will again be set. Another
edge trigger is not required. This makes these signals “level” triggered inputs.
5.15.4 GPIO Registers Lockdown
The following GPIO registers are locked down when the GPIO Lockdown Enable (GLE)
bit is set. The GLE bit resides in D31:F0:GPIO Control (GC) register.
Offset 00h: GPIO_USE_SEL[31:0]
Offset 04h: GP_IO_SEL[31:0]
Offset 0Ch: GP_LVL[31:0]
Offset 28h: GPI_NMI_EN[15:0]
Offset 2Ch: GPI_INV[31:0]
Offset 30h: GPIO_USE_SEL2[63:32]
Offset 34h: GPI_IO_SEL2[63:32]
Offset 38h: GP_LVL2[63:32]
Offset 40h: GPIO_USE_SEL3[95:64]
Offset 44h: GPI_IO_SEL3[95:64]
Offset 48h: GP_LVL3[95:64]
Offset 60h: GP_RST_SEL[31:0]
Offset 64h: GP_RST_SEL2[63:32]
Offset 68h: GP_RST_SEL3[95:64]
Functional Description
198 Datasheet
Once these registers are locked down, they become Read-Only registers and any
software writes to these registers will have no effect. To unlock the registers, the GPIO
Lockdown Enable (GLE) bit is required to be cleared to ‘0’. When the GLE bit changes
from a ‘1’ to a ‘0’ a System Management Interrupt (SMI#) is generated if enabled.
Once the GPIO_UNLOCK_SMI bit is set, it can not be changed until a PLTRST# occurs.
This ensures that only BIOS can change the GPIO configuration. If the GLE bit is
cleared by unauthorized software, BIOS will set the GLE bit again when the SMI# is
triggered and these registers will continue to be locked down.
5.15.5 Serial POST Codes Over GPIO
The PCH adds the extended capability allowing system software to serialize POST or
other messages on GPIO. This capability negates the requirement for dedicated
diagnostic LEDs on the platform. Additionally, based on the newer BTX form factors, the
PCI bus as a target for POST codes is increasingly difficult to support as the total
number of PCI devices supported are decreasing.
5.15.5.1 Theory of operation
For the PCH generation POST code serialization logic will be shared with GPIO. These
GPIOs will likely be shared with LED control offered by the Super I/O (SIO) component.
Figure 5-7 shows a likely configuration.
The anticipated usage model is that either the PCH or the SIO can drive a pin low to
turn off an LED. In the case of the power LED, the SIO would normally leave its
corresponding pin in a high-Z state to allow the LED to turn on. In this state, the PCH
can blink the LED by driving its corresponding pin low and subsequently tri-stating the
buffer. The I/O buffer should not drive a ‘1’ when configured for this functionality and
should be capable of sinking 24 mA of current.
An external optical sensing device can detect the on/off state of the LED. By externally
post-processing the information from the optical device, the serial bit stream can be
recovered. The hardware will supply a ‘sync’ byte before the actual data transmission
to allow external detection of the transmit frequency. The frequency of transmission
should be limited to 1 transition every 1 μs to ensure the detector can reliably sample
Figure 5-7. Serial Post over GPIO Reference Circuit
SIO
V_3P3_STBY
LED
R
Note: The pull-up value is based on the brightness required.
PCH
Datasheet 199
Functional Description
the on/off state of the LED. To allow flexibility in pull-up resistor values for power
optimization, the frequency of the transmission is programmable using the DRS field in
the GP_GB_CMDSTS register.
The serial bit stream is Manchester encoded. This choice of transmission ensures that a
transition will be seen on every clock. The 1 or 0 data is based on the transmission
happening during the high or low phase of the clock.
As the clock will be encoded within the data stream, hardware must ensure that the
Z-0 and 0-Z transitions are glitch-free. Driving the pin directly from a flop or through
glitch-free logic are possible methods to meet the glitch-free requirement.
A simplified hardware/software register interface provides control and status
information to track the activity of this block. Software enabling the serial blink
capability should implement an algorithm referenced below to send the serialized
message on the enabled GPIO.
1. Read the Go/Busy status bit in the GP_GB_CMDSTS register and verify it is cleared.
This will ensure that the GPIO is idled and a previously requested message is still
not in progress.
2. Write the data to serialize into the GP_GB_DATA register.
3. Write the DLS and DRS values into the GP_GB_CMDSTS register and set the Go bit.
This may be accomplished using a single write.
The reference diagram shows the LEDs being powered from the suspend supply. By
providing a generic capability that can be used both in the main and the suspend power
planes maximum flexibility can be achieved. A key point to make is that the PCH will
not unintentionally drive the LED control pin low unless a serialization is in progress.
System board connections utilizing this serialization capability are required to use the
same power plane controlling the LED as the PCH GPIO pin. Otherwise, the PCH GPIO
may float low during the message and prevent the LED from being controlled from the
SIO. The hardware will only be serializing messages when the core power well is
powered and the processor is operational.
Care should be taken to prevent the PCH from driving an active ‘1’ on a pin sharing the
serial LED capability. Since the SIO could be driving the line to 0, having the PCH drive
a 1 would create a high current path. A recommendation to avoid this condition
involves choosing a GPIO defaulting to an input. The GP_SER_BLINK register should be
set first before changing the direction of the pin to an output. This sequence ensures
the open-drain capability of the buffer is properly configured before enabling the pin as
an output.
5.15.5.2 Serial Message Format
To serialize the data onto the GPIO, an initial state of high-Z is assumed. The SIO is
required to have its LED control pin in a high-Z state as well to allow the PCH to blink
the LED (see the reference diagram).
The three components of the serial message include the sync, data, and idle fields. The
sync field is 7 bits of ‘1’ data followed by 1 bit of ‘0’ data. Starting from the high-Z state
(LED on) provides external hardware a known initial condition and a known pattern. In
case one or more of the leading 1 sync bits are lost, the 1s followed by 0 provide a
clear indication of ‘end of sync’. This pattern will be used to ‘lock’ external sampling
logic to the encoded clock.
The data field is shifted out with the highest byte first (MSB). Within each byte, the
most significant bit is shifted first (MSb).
Functional Description
200 Datasheet
The idle field is enforced by the hardware and is at least 2 bit times long. The hardware
will not clear the Busy and Go bits until this idle time is met. Supporting the idle time in
hardware prevents time-based counting in BIOS as the hardware is immediately ready
for the next serial code when the Go bit is cleared. Note that the idle state is
represented as a high-Z condition on the pin. If the last transmitted bit is a 1, returning
to the idle state will result in a final 0-1 transition on the output Manchester data. Two
full bit times of idle correspond to a count of 4 time intervals (the width of the time
interval is controlled by the DRS field).
The following waveform shows a 1-byte serial write with a data byte of 5Ah. The
internal clock and bit position are for reference purposes only. The Manchester D is the
resultant data generated and serialized onto the GPIO. Since the buffer is operating in
open-drain mode the transitions are from high-Z to 0 and back.
5.16 SATA Host Controller (D31:F2, F5)
The SATA function in the PCH has three modes of operation to support different
operating system conditions. In the case of Native IDE enabled operating systems, the
PCH uses two controllers to enable all six ports of the bus. The first controller (Device
31: Function 2) supports ports 0 – 3 and the second controller (Device 31: Function 5)
supports ports 4 and 5. When using a legacy operating system, only one controller
(Device 31: Function 2) is available that supports ports 0 – 3. In AHCI or RAID mode,
only one controller (Device 31: Function 2) is used enabling all six ports and the second
controller (Device 31: Function 5) shall be disabled.
The MAP register, Section 15.1.28, provides the ability to share PCI functions. When
sharing is enabled, all decode of I/O is done through the SATA registers. Device 31,
Function 1 (IDE controller) is hidden by software writing to the Function Disable
Register (D31, F0, offset F2h, bit 1), and its configuration registers are not used.
The PCH SATA controllers feature six sets of interface signals (ports) that can be
independently enabled or disabled (they cannot be tri-stated or driven low). Each
interface is supported by an independent DMA controller.
Note: SATA port 2 and 3 are not available for the HM55 and Intel 3400 chipsets.
The PCH SATA controllers interact with an attached mass storage device through a
register interface that is equivalent to that presented by a traditional IDE host adapter.
The host software follows existing standards and conventions when accessing the
register interface and follows standard command protocol conventions.
Note: SATA interface transfer rates are independent of UDMA mode settings. SATA interface
transfer rates will operate at the bus’s maximum speed, regardless of the UDMA mode
reported by the SATA device or the system BIOS.
Internal Clock
Manchester D
8-bit sync field
(1111_1110)
Bit 7 0123456
5A data byte
2 clk
idle
Datasheet 201
Functional Description
5.16.1 SATA Feature Support
Feature
PCH
(AHCI/RAID
Disabled)
PCH
(AHCI/RAID
Enabled)
Native Command Queuing (NCQ) N/A Supported
Auto Activate for DMA N/A Supported
Hot Plug Support N/A Supported
Asynchronous Signal Recovery N/A Supported
3 Gb/s Transfer Rate Supported Supported
ATAPI Asynchronous Notification N/A Supported
Host & Link Initiated Power Management N/A Supported
Staggered Spin-Up Supported Supported
Command Completion Coalescing N/A N/A
External SATA N/A Supported
Feature Description
Native Command Queuing
(NCQ)
Allows the device to reorder commands for more efficient data
transfers
Auto Activate for DMA Collapses a DMA Setup then DMA Activate sequence into a DMA
Setup only
Hot Plug Support
Allows for device detection without power being applied and
ability to connect and disconnect devices without prior
notification to the system
Asynchronous Signal
Recovery
Provides a recovery from a loss of signal or establishing
communication after hot plug
3 Gb/s Transfer Rate Capable of data transfers up to 3Gb/s
ATAPI Asynchronous
Notification
A mechanism for a device to send a notification to the host that
the device requires attention
Host & Link Initiated Power
Management
Capability for the host controller or device to request Partial and
Slumber interface power states
Staggered Spin-Up Enables the host the ability to spin up hard drives sequentially
to prevent power load problems on boot
Command Completion
Coalescing
Reduces interrupt and completion overhead by allowing a
specified number of commands to complete and then generating
an interrupt to process the commands
External SATA Technology that allows for an outside the box connection of up
to 2 meters (when using the cable defined in SATA-IO)
Functional Description
202 Datasheet
5.16.2 Theory of Operation
5.16.2.1 Standard ATA Emulation
The PCH contains a set of registers that shadow the contents of the legacy IDE
registers. The behavior of the Command and Control Block registers, PIO, and DMA
data transfers, resets, and interrupts are all emulated.
Note: The PCH will assert INTR when the master device completes the EDD command
regardless of the command completion status of the slave device. If the master
completes EDD first, an INTR is generated and BSY will remain '1' until the slave
completes the command. If the slave completes EDD first, BSY will be '0' when the
master completes the EDD command and asserts INTR. Software must wait for busy to
clear (0) before completing an EDD command, as required by the ATA5 through ATA7
(T13) industry standards.
5.16.2.2 48-Bit LBA Operation
The SATA host controller supports 48-bit LBA through the host-to-device register FIS
when accesses are performed using writes to the task file. The SATA host controller will
ensure that the correct data is put into the correct byte of the host-to-device FIS.
There are special considerations when reading from the task file to support 48-bit LBA
operation. Software may need to read all 16-bits. Since the registers are only 8-bits
wide and act as a FIFO, a bit must be set in the device/control register, which is at
offset 3F6h for primary and 376h for secondary (or their native counterparts).
If software clears bit 7 of the control register before performing a read, the last item
written will be returned from the FIFO. If software sets bit 7 of the control register
before performing a read, the first item written will be returned from the FIFO.
5.16.3 SATA Swap Bay Support
The PCH provides for basic SATA swap bay support using the PSC register configuration
bits and power management flows. A device can be powered down by software and the
port can then be disabled, allowing removal and insertion of a new device.
Note: This SATA swap bay operation requires board hardware (implementation specific),
BIOS, and operating system support.
5.16.4 Hot Plug Operation
The PCH supports Hot Plug Surprise removal and Insertion Notification in the PARTIAL,
SLUMBER and Listen Mode states when used with Low Power Device Presence
Detection. Software can take advantage of power savings in the low power states while
enabling hot plug operation. See chapter 7 of the AHCI specification for details.
5.16.4.1 Low Power Device Presence Detection
Low Power Device Presence Detection enables SATA Link Power Management to co-
exist with hot plug (insertion and removal) without interlock switch or cold presence
detect. The detection mechanism allows Hot Plug events to be detectable by hardware
across all link power states (Active, PARTIAL, SLUMBER) as well as AHCI Listen Mode.
If the Low Power Device Presence Detection circuit is disabled the PCH reverts to Hot
Plug Surprise Removal Notification (without an interlock switch) mode that is mutually
exclusive of the PARTIAL and SLUMBER power management states.
Datasheet 203
Functional Description
5.16.5 Function Level Reset Support (FLR)
The SATA Host Controller supports the Function Level Reset (FLR) capability. The FLR
capability can be used in conjunction with Intel® Virtualization Technology. FLR allows
an operating system in a Virtual Machine to have complete control over a device,
including its initialization, without interfering with the rest of the platform. The device
provides a software interface that enables the Operating System to reset the whole
device as if a PCI reset was asserted.
5.16.5.1 FLR Steps
5.16.5.1.1 FLR Initialization
1. A FLR is initiated by software writing a ‘1’ to the Initiate FLR bit.
2. All subsequent requests targeting the Function will not be claimed and will be
Master Abort Immediate on the bus. This includes any configuration, I/O or
Memory cycles, however, the Function shall continue to accept completions
targeting the Function.
5.16.5.1.2 FLR Operation
The Function will Reset all configuration, I/O and memory registers of the Function
except those indicated otherwise and reset all internal states of the Function to the
default or initial condition.
5.16.5.1.3 FLR Completion
The Initiate FLR bit is reset (cleared) when the FLR reset is completed. This bit can be
used to indicate to the software that the FLR reset is completed.
Note: From the time Initiate FLR bit is written to 1 software must wait at least 100 ms before
accessing the function.
5.16.6 Intel® Rapid Storage Technology Configuration
The Intel® Rapid Storage Technology offers several diverse options for RAID
(redundant array of independent disks) to meet the needs of the end user. AHCI
support provides higher performance and alleviates disk bottlenecks by taking
advantage of the independent DMA engines that each SATA port offers in the PCH.
RAID Level 0 performance scaling up to 4 drives, enabling higher throughput for
data intensive applications such as video editing.
Data security is offered through RAID Level 1, which performs mirroring.
RAID Level 10 provides high levels of storage performance with data protection,
combining the fault-tolerance of RAID Level 1 with the performance of RAID Level
0. By striping RAID Level 1 segments, high I/O rates can be achieved on systems
that require both performance and fault-tolerance. RAID Level 10 requires 4 hard
drives, and provides the capacity of two drives.
RAID Level 5 provides highly efficient storage while maintaining fault-tolerance on
3 or more drives. By striping parity, and rotating it across all disks, fault tolerance
of any single drive is achieved while only consuming 1 drive worth of capacity. That
is, a 3 drive RAID 5 has the capacity of 2 drives, or a 4 drive RAID 5 has the
capacity of 3 drives. RAID 5 has high read transaction rates, with a medium write
rate. RAID 5 is well suited for applications that require high amounts of storage
while maintaining fault tolerance.
Functional Description
204 Datasheet
By using the PCH’s built-in Intel® Rapid Storage Technology, there is no loss of PCI
resources (request/grant pair) or add-in card slot.
Intel® Rapid Storage Technology functionality requires the following items:
1. The PCH SKU enabled for Intel® Rapid Storage Technology (see Section 1.3)
2. Intel® Rapid Storage Manager RAID Option ROM must be on the platform
3. Intel® Rapid Storage Manager drivers, most recent revision.
4. At least two SATA hard disk drives (minimum depends on RAID configuration).
Intel® Rapid Storage Technology is not available in the following configurations:
1. The SATA controller is in compatible mode.
5.16.6.1 Intel® Rapid Storage Manager RAID Option ROM
The Intel® Rapid Storage Manager RAID Option ROM is a standard PnP Option ROM
that is easily integrated into any System BIOS. When in place, it provides the following
three primary functions:
Provides a text mode user interface that allows the user to manage the RAID
configuration on the system in a pre-operating system environment. Its feature set
is kept simple to keep size to a minimum, but allows the user to create & delete
RAID volumes and select recovery options when problems occur.
Provides boot support when using a RAID volume as a boot disk. It does this by
providing Int13 services when a RAID volume needs to be accessed by DOS
applications (such as NTLDR) and by exporting the RAID volumes to the System
BIOS for selection in the boot order.
At each boot up, provides the user with a status of the RAID volumes and the
option to enter the user interface by pressing CTRL-I.
5.16.7 Power Management Operation
Power management of the PCH SATA controller and ports will cover operations of the
host controller and the SATA wire.
5.16.7.1 Power State Mappings
The D0 PCI power management state for device is supported by the PCH SATA
controller.
SATA devices may also have multiple power states. From parallel ATA, three device
states are supported through ACPI. They are:
D0 – Device is working and instantly available.
D1 – Device enters when it receives a STANDBY IMMEDIATE command. Exit latency
from this state is in seconds.
D3 – From the SATA device’s perspective, no different than a D1 state, in that it is
entered using the STANDBY IMMEDIATE command. However, an ACPI method is
also called which will reset the device and then cut its power.
Each of these device states are subsets of the host controller’s D0 state.
Datasheet 205
Functional Description
Finally, SATA defines three PHY layer power states, which have no equivalent mappings
to parallel ATA. They are:
PHY READY – PHY logic and PLL are both on and active.
Partial – PHY logic is powered, but in a reduced state. Exit latency is no longer
than 10 ns.
Slumber – PHY logic is powered, but in a reduced state. Exit latency can be up to
10 ms.
Since these states have much lower exit latency than the ACPI D1 and D3 states, the
SATA controller defines these states as sub-states of the device D0 state.
5.16.7.2 Power State Transitions
5.16.7.2.1 Partial and Slumber State Entry/Exit
The partial and slumber states save interface power when the interface is idle. It would
be most analogous to PCI CLKRUN# (in power savings, not in mechanism), where the
interface can have power saved while no commands are pending. The SATA controller
defines PHY layer power management (as performed using primitives) as a driver
operation from the host side, and a device proprietary mechanism on the device side.
The SATA controller accepts device transition types, but does not issue any transitions
as a host. All received requests from a SATA device will be ACKed.
When an operation is performed to the SATA controller such that it needs to use the
SATA cable, the controller must check whether the link is in the Partial or Slumber
states, and if so, must issue a COM_WAKE to bring the link back online. Similarly, the
SATA device must perform the same action.
5.16.7.2.2 Device D1, D3 States
These states are entered after some period of time when software has determined that
no commands will be sent to this device for some time. The mechanism for putting a
device in these states does not involve any work on the host controller, other then
sending commands over the interface to the device. The command most likely to be
used in ATA/ATAPI is the “STANDBY IMMEDIATE” command.
5.16.7.2.3 Host Controller D3HOT State
After the interface and device have been put into a low power state, the SATA host
controller may be put into a low power state. This is performed using the PCI power
management registers in configuration space. There are two very important aspects to
note when using PCI power management.
1. When the power state is D3, only accesses to configuration space are allowed. Any
attempt to access the memory or I/O spaces will result in master abort.
2. When the power state is D3, no interrupts may be generated, even if they are
enabled. If an interrupt status bit is pending when the controller transitions to D0,
an interrupt may be generated.
When the controller is put into D3, it is assumed that software has properly shut down
the device and disabled the ports. Therefore, there is no need to sustain any values on
the port wires. The interface will be treated as if no device is present on the cable, and
power will be minimized.
When returning from a D3 state, an internal reset will not be performed.
Functional Description
206 Datasheet
5.16.7.2.4 Non-AHCI Mode PME# Generation
When in non-AHCI mode (legacy mode) of operation, the SATA controller does not
generate PME#. This includes attach events (since the port must be disabled), or
interlock switch events (using the SATAGP pins).
5.16.7.3 SMI Trapping (APM)
Device 31:Function2:Offset C0h (see Section 14.1.42) contain control for generating
SMI# on accesses to the IDE I/O spaces. These bits map to the legacy ranges
(1F0–1F7h, 3F6h, 170–177h, and 376h) and native IDE ranges defined by PCMDBA,
PCTLBA, SCMDBA an SCTLBA. If the SATA controller is in legacy mode and is using
these addresses, accesses to one of these ranges with the appropriate bit set causes
the cycle to not be forwarded to the SATA controller, and for an SMI# to be generated.
If an access to the Bus-Master IDE registers occurs while trapping is enabled for the
device being accessed, then the register is updated, an SMI# is generated, and the
device activity status bits (Section 14.1.43) are updated indicating that a trap
occurred.
5.16.8 SATA Device Presence
In legacy mode, the SATA controller does not generate interrupts based on hot plug/
unplug events. However, the SATA PHY does know when a device is connected (if not in
a partial or slumber state), and it s beneficial to communicate this information to host
software as this will greatly reduce boot times and resume times.
The flow used to indicate SATA device presence is shown in Figure 5-8. The ‘PxE’ bit
refers to PCS.P[3:0]E bits, depending on the port being checked and the ‘PxP’ bits refer
to the PCS.P[3:0]P bits, depending on the port being checked. If the PCS/PxP bit is set
a device is present, if the bit is cleared a device is not present. If a port is disabled,
software can check to see if a new device is connected by periodically re-enabling the
port and observing if a device is present, if a device is not present it can disable the
port and check again later. If a port remains enabled, software can periodically poll
PCS.PxP to see if a new device is connected.
Figure 5-8. Flow for Port Enable / Device Present Bits
Datasheet 207
Functional Description
5.16.9 SATA LED
The SATALED# output is driven whenever the BSY bit is set in any SATA port. The
SATALED# is an active-low open-drain output. When SATALED# is low, the LED should
be active. When SATALED# is high, the LED should be inactive.
5.16.10 AHCI Operation
The PCH provides hardware support for Advanced Host Controller Interface (AHCI), a
programming interface for SATA host controllers developed through a joint industry
effort. AHCI defines transactions between the SATA controller and software and enables
advanced performance and usability with SATA. Platforms supporting AHCI may take
advantage of performance features such as no master/slave designation for SATA
devices—each device is treated as a master—and hardware assisted native command
queuing. AHCI also provides usability enhancements such as Hot-Plug. AHCI requires
appropriate software support (such as, an AHCI driver) and for some features,
hardware support in the SATA device or additional platform hardware.
The PCH supports all of the mandatory features of the Serial ATA Advanced Host
Controller Interface Specification, Revision 1.2 and many optional features, such as
hardware assisted native command queuing, aggressive power management, LED
indicator support, and Hot-Plug through the use of interlock switch support (additional
platform hardware and software may be required depending upon the implementation).
Note: For reliable device removal notification while in AHCI operation without the use of
interlock switches (surprise removal), interface power management should be disabled
for the associated port. See Section 7.3.1 of the AHCI Specification for more
information.
5.16.11 SGPIO Signals
The SGPIO signals, in accordance to the SFF-8485 specification, support per-port LED
signaling. These signals are not related to SATALED#, which allows for simplified
indication of SATA command activity. The SGPIO group interfaces with an external
controller chip that fetches and serializes the data for driving across the SGPIO bus.
The output signals then control the LEDs. This feature is only valid in AHCI/RAID mode.
Note: Intel does not validate all possible usage cases of this feature. Customers should
validate their specific design implementation on their own platforms.
5.16.11.1 Mechanism
The enclosure management for SATA Controller 1 (Device 31: Function 2) involves
sending messages that control LEDs in the enclosure. The messages for this function
are stored after the normal registers in the AHCI BAR, at Offset 580h bytes for the PCH
from the beginning of the AHCI BAR as specified by the EM_LOC global register
(Section 14.4.1.8).
Software creates messages for transmission in the enclosure management message
buffer. The data in the message buffer should not be changed if CTL.TM bit is set by
software to transmit an update message. Software should only update the message
buffer when CTL.TM bit is cleared by hardware otherwise the message transmitted will
be indeterminate. Software then writes a register to cause hardware to transmit the
message or take appropriate action based on the message content. The software
should only create message types supported by the controller, which is LED messages
for the PCH. If the software creates other non LED message types (such as, SAF-TE,
SES-2), the SGPIO interface may hang and the result is indeterminate.
Functional Description
208 Datasheet
During reset all SGPIO pins will be in tri-state. The interface will continue to be in tri-
state after reset until the first transmission occurs when software programs the
message buffer and sets the transmit bit CTL.TM. The SATA Host controller will initiate
the transmission by driving SCLOCK and at the same time drive the SLOAD to ‘0’ prior
to the actual bit stream transmission. The Host will drive SLOAD low for at least 5
SCLOCK then only start the bit stream by driving the SLOAD to high. SLOAD will be
driven high for 1 SCLOCK follow by vendor specific pattern that is default to “0000” if
software has yet to program the value. A total of 21-bit stream from 7 ports (Port0,
Port1, Port2, Port3, Port4 Port5 and Port6) of 3-bit per port LED message will be
transmitted on SDATAOUT0 pin after the SLOAD is driven high for 1 SCLOCK. Only 3
ports (Port4, Port5 and Port6) of 9 bit total LED message follow by 12 bits of tri-state
value will be transmitted out on SDATAOUT1 pin.
All the default LED message values will be high prior to software setting them, except
the Activity LED message that is configured to be hardware driven that will be
generated based on the activity from the respective port. All the LED message values
will be driven to ‘1’ for the port that is unimplemented as indicated in the Port
Implemented register regardless of the software programmed value through the
message buffer.
There are 2 different ways of resetting the PCH’s SGPIO interface, asynchronous reset
and synchronous reset. Asynchronous reset is caused by platform reset to cause the
SGPIO interface to be tri-state asynchronously. Synchronous reset is caused by setting
the CTL.RESET bit, clearing the GHC.AE bit or HBA reset, where Host Controller will
complete the existing full bit stream transmission then only tri-state all the SGPIO pins.
After the reset, both synchronous and asynchronous, the SGPIO pins will stay tri-
stated.
Note: The PCH Host Controller does not ensure that it will cause the target SGPIO device or
controller to be reset. Software is responsible to keep the PCH SGPIO interface in tri-
state for 2 second to cause a reset on the target of the SGPIO interface.
5.16.11.2 Message Format
Messages shall be constructed with a one DWord header that describes the message to
be sent followed by the actual message contents. The first DWord shall be constructed
as follows:
Bit Description
31:28 Reserved
27:24
Message Type (MTYPE): Specifies the type of the message.
The message types are:
0h = LED
1h = SAF-TE
2h = SES-2
3h = SGPIO (register based interface)
All other values reserved
23:16
Data Size (DSIZE): Specifies the data size in bytes. If the message (enclosure
services command) has a data buffer that is associated with it that is transferred, the
size of that data buffer is specified in this field. If there is no separate data buffer, this
field shall have a value of ‘0’. The data directly follows the message in the message
buffer. For the PCH, this value should always be ‘0.
15:8
Message Size (MSIZE): Specifies the size of the message in bytes. The message size
does not include the one DWord header. A value of ‘0’ is invalid. For the PCH, the
message size is always 4 bytes.
7:0 Reserved
Datasheet 209
Functional Description
The SAF-TE, SES-2, and SGPIO message formats are defined in the corresponding
specifications, respectively. The LED message type is defined in Section 5.16.11.3. It is
the responsibility of software to ensure the content of the message format is correct. If
the message type is not programmed as 'LED' for this controller, the controller shall not
take any action to update its LEDs. Note that for LED message type, the message size
is always consisted of 4 bytes.
5.16.11.3 LED Message Type
The LED message type specifies the status of up to three LEDs. Typically, the usage for
these LEDs is activity, fault, and locate. Not all implementations necessarily contain all
LEDs (for example, some implementations may not have a locate LED). The message
identifies the HBA port number and the Port Multiplier port number that the slot status
applies to. If a Port Multiplier is not in use with a particular device, the Port Multiplier
port number shall be ‘0’. The format of the LED message type is defined in Table 5-37.
The LEDs shall retain their values until there is a following update for that particular
slot.
Table 5-37. Multi-activity LED message type
Byte Description
3-2
Value (VAL): This field describes the state of each LED for a particular location. There
are three LEDs that may be supported by the HBA. Each LED has 3 bits of control.
LED values are:
000b – LED shall be off
001b – LED shall be solid on as perceived by human eye
All other values reserved
The LED bit locations are:
Bits 2:0 – Activity LED (may be driven by hardware)
Bits 5:3 – Vendor Specific LED (such as, locate)
Bits 8:6 - Vendor Specific LED (such as, fault)
Bits 15:9 – Reserved
Vendor specific message is:
Bit 3:0 – Vendor Specific Pattern
Bit 15:4 – Reserved
NOTE: If Activity LED Hardware Driven (ATTR.ALHD) bit is set, host will output the
hardware LED value sampled internally and will ignore software written activity
value on bit [2:0]. Since the PCH Enclosure Management does not support port
multiplier based LED message, the LED message will be generated
independently based on respective port’s operation activity. Vendor specific LED
values Locate (Bits 5:3) and Fault (Bits 8:6) always are driven by software.
1
Port Multiplier Information: Specifies slot specific information related to Port
Multiplier.
Bits 3:0 specify the Port Multiplier port number for the slot that requires the status
update. If a Port Multiplier is not attached to the device in the affected slot, the Port
Multiplier port number shall be '0'. Bits 7:4 are reserved. The PCH does not support LED
messages for devices behind a Port Multiplier. This byte should be 0.
0
HBA Information: Specifies slot specific information related to the HBA.
Bits 4:0 – HBA port number for the slot that requires the status update.
Bit 5 – If set to '1', value is a vendor specific message that applies to the entire
enclosure. If cleared to '0', value applies to the port specified in bits 4:0.
Bits 7:6 – Reserved
Functional Description
210 Datasheet
5.16.11.4 SGPIO Waveform
Figure 5-9. Serial Data transmitted over the SGPIO Interface
Datasheet 211
Functional Description
5.16.12 External SATA
The PCH supports external SATA. External SATA uses the SATA interface outside of the
system box. The usage model for this feature must comply with the Serial ATA II
Cables and Connectors Volume 2 Gold specification at www.sata-io.org. Intel validates
two configurations:
1. The cable-up solution involves an internal SATA cable that connects to the SATA
motherboard connector and spans to a back panel PCI bracket with an eSATA
connector. A separate eSATA cable is required to connect an eSATA device.
2. The back-panel solution involves running a trace to the I/O back panel and
connecting a device using an external SATA connector on the board.
5.17 High Precision Event Timers
This function provides a set of timers that can be used by the operating system. The
timers are defined such that in the future, the operating system may be able to assign
specific timers to used directly by specific applications. Each timer can be configured to
cause a separate interrupt.
The PCH provides eight timers. The timers are implemented as a single counter, each
with its own comparator and value register. This counter increases monotonically. Each
individual timer can generate an interrupt when the value in its value register matches
the value in the main counter.
The registers associated with these timers are mapped to a memory space (much like
the I/O APIC). However, it is not implemented as a standard PCI function. The BIOS
reports to the operating system the location of the register space. The hardware can
support an assignable decode space; however, the BIOS sets this space prior to
handing it over to the operating system. It is not expected that the operating system
will move the location of these timers once it is set by the BIOS.
5.17.1 Timer Accuracy
1. The timers are accurate over any 1 ms period to within 0.05% of the time specified
in the timer resolution fields.
2. Within any 100 microsecond period, the timer reports a time that is up to two ticks
too early or too late. Each tick is less than or equal to 100 ns, so this represents an
error of less than 0.2%.
3. The timer is monotonic. It does not return the same value on two consecutive
reads (unless the counter has rolled over and reached the same value).
The main counter is clocked by the 14.31818 MHz clock, synchronized into the
66.666 MHz domain. This results in a non-uniform duty cycle on the synchronized
clock, but does have the correct average period. The accuracy of the main counter is as
accurate as the 14.31818 MHz clock.
Functional Description
212 Datasheet
5.17.2 Interrupt Mapping
Mapping Option #1 (Legacy Replacement Option)
In this case, the Legacy Replacement Rout bit (LEG_RT_CNF) is set. This forces the
mapping found in Table 5-38.
NOTE: The Legacy Option does not preclude delivery of IRQ0/IRQ8 using direct FSB interrupt
messages.
Mapping Option #2 (Standard Option)
In this case, the Legacy Replacement Rout bit (LEG_RT_CNF) is 0. Each timer has its
own routing control. The interrupts can be routed to various interrupts in the 8259 or
I/O APIC. A capabilities field indicates which interrupts are valid options for routing. If a
timer is set for edge-triggered mode, the timers should not be share with any PCI
interrupts.
For the PCH, the only supported interrupt values are as follows:
Timer 0 and 1: IRQ20, 21, 22 & 23 (I/O APIC only).
Timer 2: IRQ11 (8259 or I/O APIC) and IRQ20, 21, 22 & 23 (I/O APIC only).
Timer 3: IRQ12 (8259 or I/O APIC) and IRQ 20, 21, 22 & 23 (I/O APIC only).
Interrupts from Timer 4, 5, 6, 7 can only be delivered using direct FSB interrupt
messages.
5.17.3 Periodic vs. Non-Periodic Modes
Non-Periodic Mode
Timer 0 is configurable to 32 (default) or 64-bit mode, whereas Timers 1, 2 and 3 only
support 32-bit mode (See Section 20.1.5).
All of the timers support non-periodic mode.
See Section 2.3.9.2.1 of the IA-PC HPET Specification for a description of this mode.
Table 5-38. Legacy Replacement Routing
Timer 8259 Mapping APIC Mapping Comment
0 IRQ0 IRQ2 In this case, the 8254 timer will
not cause any interrupts
1 IRQ8 IRQ8 In this case, the RTC will not cause
any interrupts.
2 & 3 Per IRQ Routing
Field. Per IRQ Routing Field
4, 5, 6, 7 not available not available
Datasheet 213
Functional Description
Periodic Mode
Timer 0 is the only timer that supports periodic mode. See Section 2.3.9.2.2 of the IA-
PC HPET Specification for a description of this mode.
The following usage model is expected:
1. Software clears the ENABLE_CNF bit to prevent any interrupts.
2. Software Clears the main counter by writing a value of 00h to it.
3. Software sets the TIMER0_VAL_SET_CNF bit.
4. Software writes the new value in the TIMER0_COMPARATOR_VAL register.
5. Software sets the ENABLE_CNF bit to enable interrupts.
The Timer 0 Comparator Value register cannot be programmed reliably by a single
64-bit write in a 32-bit environment except if only the periodic rate is being changed
during run-time. If the actual Timer 0 Comparator Value needs to be reinitialized, then
the following software solution will always work regardless of the environment:
1. Set TIMER0_VAL_SET_CNF bit.
2. Set the lower 32 bits of the Timer0 Comparator Value register.
3. Set TIMER0_VAL_SET_CNF bit.
4. Set the upper 32 bits of the Timer0 Comparator Value register.
5.17.4 Enabling the Timers
The BIOS or operating system PnP code should route the interrupts. This includes the
Legacy Rout bit, Interrupt Rout bit (for each timer), interrupt type (to select the edge
or level type for each timer)
The Device Driver code should do the following for an available timer:
1. Set the Overall Enable bit (Offset 10h, bit 0).
2. Set the timer type field (selects one-shot or periodic).
3. Set the interrupt enable.
4. Set the comparator value.
5.17.5 Interrupt Levels
Interrupts directed to the internal 8259s are active high. See Section 5.9 for
information regarding the polarity programming of the I/O APIC for detecting internal
interrupts.
If the interrupts are mapped to the 8259 or I/O APIC and set for level-triggered mode,
they can be shared with PCI interrupts. They may be shared although it’s unlikely for
the operating system to attempt to do this.
If more than one timer is configured to share the same IRQ (using the
TIMERn_INT_ROUT_CNF fields), then the software must configure the timers to level-
triggered mode. Edge-triggered interrupts cannot be shared.
Functional Description
214 Datasheet
5.17.6 Handling Interrupts
If each timer has a unique interrupt and the timer has been configured for edge-
triggered mode, then there are no specific steps required. No read is required to
process the interrupt.
If a timer has been configured to level-triggered mode, then its interrupt must be
cleared by the software. This is done by reading the interrupt status register and
writing a 1 back to the bit position for the interrupt to be cleared.
Independent of the mode, software can read the value in the main counter to see how
time has passed between when the interrupt was generated and when it was first
serviced.
If Timer 0 is set up to generate a periodic interrupt, the software can check to see how
much time remains until the next interrupt by checking the timer value register.
5.17.7 Issues Related to 64-Bit Timers with 32-Bit Processors
A 32-bit timer can be read directly using processors that are capable of 32-bit or 64-bit
instructions. However, a 32-bit processor may not be able to directly read 64-bit timer.
A race condition comes up if a 32-bit processor reads the 64-bit register using two
separate 32-bit reads. The danger is that just after reading one half, the other half rolls
over and changes the first half.
If a 32-bit processor needs to access a 64-bit timer, it must first halt the timer before
reading both the upper and lower 32-bits of the timer. If a 32-bit processor does not
want to halt the timer, it can use the 64-bit timer as a 32-bit timer by setting the
TIMERn_32MODE_CNF bit. This causes the timer to behave as a 32-bit timer. The upper
32-bits are always 0.
Alternatively, software may do a multiple read of the counter while it is running.
Software can read the high 32 bits, then the low 32 bits, the high 32 bits again. If the
high 32 bits have not changed between the two reads, then a rollover has not
happened and the low 32 bits are valid. If the high 32 bits have changed between
reads, then the multiple reads are repeated until a valid read is performed.
Note: On a 64-bit platform, if software attempts a 64 bit read of the 64-bit counter, software
must be aware that some platforms may split the 64 bit read into two 32 bit reads. The
read maybe inaccurate if the low 32 bits roll over between the high and low reads.
Datasheet 215
Functional Description
5.18 USB EHCI Host Controllers (D29:F0 and D26:F0)
The PCH contains two Enhanced Host Controller Interface (EHCI) host controllers which
support up to fourteen USB 2.0 high-speed root ports. USB 2.0 allows data transfers up
to 480 Mb/s. USB 2.0 based Debug Port is also implemented in the PCH.
5.18.1 EHC Initialization
The following descriptions step through the expected PCH Enhanced Host Controller
(EHC) initialization sequence in chronological order, beginning with a complete power
cycle in which the suspend well and core well have been off.
5.18.1.1 BIOS Initialization
BIOS performs a number of platform customization steps after the core well has
powered up. Contact your Intel Field Representative for additional PCH BIOS
information.
5.18.1.2 Driver Initialization
See Chapter 4 of the Enhanced Host Controller Interface Specification for Universal
Serial Bus, Revision 1.0.
5.18.1.3 EHC Resets
In addition to the standard PCH hardware resets, portions of the EHC are reset by the
HCRESET bit and the transition from the D3HOT device power management state to the
D0 state. The effects of each of these resets are:
If the detailed register descriptions give exceptions to these rules, those exceptions
override these rules. This summary is provided to help explain the reasons for the reset
policies.
5.18.2 Data Structures in Main Memory
See Section 3 and Appendix B of the Enhanced Host Controller Interface Specification
for Universal Serial Bus, Revision 1.0 for details.
Reset Does Reset Does not Reset Comments
HCRESET bit set.
Memory space
registers except
Structural
Parameters (which is
written by BIOS).
Configuration
registers.
The HCRESET must only affect
registers that the EHCI driver
controls. PCI Configuration
space and BIOS-programmed
parameters can not be reset.
Software writes
the Device Power
State from D3HOT
(11b) to D0
(00b).
Core well registers
(except BIOS-
programmed
registers).
Suspend well
registers; BIOS-
programmed core
well registers.
The D3-to-D0 transition must
not cause wake information
(suspend well) to be lost. It also
must not clear BIOS-
programmed registers because
BIOS may not be invoked
following the D3-to-D0
transition.
Functional Description
216 Datasheet
5.18.3 USB 2.0 Enhanced Host Controller DMA
The PCH USB 2.0 EHC implements three sources of USB packets. They are, in order of
priority on USB during each microframe:
1. The USB 2.0 Debug Port (see Section USB 2.0 Based Debug Port),
2. The Periodic DMA engine, and
3. The Asynchronous DMA engine.
The PCH always performs any currently-pending debug port transaction at the
beginning of a microframe, followed by any pending periodic traffic for the current
microframe. If there is time left in the microframe, then the EHC performs any pending
asynchronous traffic until the end of the microframe (EOF1). Note that the debug port
traffic is only presented on Port #1 and Port #9, while the other ports are idle during
this time.
5.18.4 Data Encoding and Bit Stuffing
See Chapter 8 of the Universal Serial Bus Specification, Revision 2.0.
5.18.5 Packet Formats
See Chapter 8 of the Universal Serial Bus Specification, Revision 2.0.
The PCH EHCI allows entrance to USB test modes, as defined in the USB 2.0
specification, including Test J, Test Packet, etc. However note that the PCH Test Packet
test mode interpacket gap timing may not meet the USB 2.0 specification.
5.18.6 USB 2.0 Interrupts and Error Conditions
Section 4 of the Enhanced Host Controller Interface Specification for Universal Serial
Bus, Revision 1.0 goes into detail on the EHC interrupts and the error conditions that
cause them. All error conditions that the EHC detects can be reported through the EHCI
Interrupt status bits. Only PCH-specific interrupt and error-reporting behavior is
documented in this section. The EHCI Interrupts Section must be read first, followed by
this section of the datasheet to fully comprehend the EHC interrupt and error-reporting
functionality.
Based on the EHC Buffer sizes and buffer management policies, the Data Buffer
Error can never occur on the PCH.
Master Abort and Target Abort responses from hub interface on EHC-initiated read
packets will be treated as Fatal Host Errors. The EHC halts when these conditions
are encountered.
The PCH may assert the interrupts which are based on the interrupt threshold as
soon as the status for the last complete transaction in the interrupt interval has
been posted in the internal write buffers. The requirement in the Enhanced Host
Controller Interface Specification for Universal Serial Bus, Revision 1.0 (that the
status is written to memory) is met internally, even though the write may not be
seen on DMI before the interrupt is asserted.
Since the PCH supports the 1024-element Frame List size, the Frame List Rollover
interrupt occurs every 1024 milliseconds.
The PCH delivers interrupts using PIRQH#.
The PCH does not modify the CERR count on an Interrupt IN when the “Do
Complete-Split” execution criteria are not met.
For complete-split transactions in the Periodic list, the “Missed Microframe” bit does
not get set on a control-structure-fetch that fails the late-start test. If subsequent
accesses to that control structure do not fail the late-start test, then the “Missed
Microframe” bit will get set and written back.
Datasheet 217
Functional Description
5.18.6.1 Aborts on USB 2.0-Initiated Memory Reads
If a read initiated by the EHC is aborted, the EHC treats it as a fatal host error. The
following actions are taken when this occurs:
The Host System Error status bit is set.
The DMA engines are halted after completing up to one more transaction on the
USB interface.
If enabled (by the Host System Error Enable), then an interrupt is generated.
If the status is Master Abort, then the Received Master Abort bit in configuration
space is set.
If the status is Target Abort, then the Received Target Abort bit in configuration
space is set.
If enabled (by the SERR Enable bit in the function’s configuration space), then the
Signaled System Error bit in configuration bit is set.
5.18.7 USB 2.0 Power Management
5.18.7.1 Pause Feature
This feature allows platforms to dynamically enter low-power states during brief
periods when the system is idle (that is, between keystrokes). This is useful for
enabling power management features in the PCH. The policies for entering these states
typically are based on the recent history of system bus activity to incrementally enter
deeper power management states. Normally, when the EHC is enabled, it regularly
accesses main memory while traversing the DMA schedules looking for work to do; this
activity is viewed by the power management software as a non-idle system, thus
preventing the power managed states to be entered. Suspending all of the enabled
ports can prevent the memory accesses from occurring, but there is an inherent
latency overhead with entering and exiting the suspended state on the USB ports that
makes this unacceptable for the purpose of dynamic power management. As a result,
the EHCI software drivers are allowed to pause the EHC DMA engines when it knows
that the traffic patterns of the attached devices can afford the delay. The pause only
prevents the EHC from generating memory accesses; the SOF packets continue to be
generated on the USB ports (unlike the suspended state).
5.18.7.2 Suspend Feature
The Enhanced Host Controller Interface (EHCI) For Universal Serial Bus Specification,
Section 4.3 describes the details of Port Suspend and Resume.
Functional Description
218 Datasheet
5.18.7.3 ACPI Device States
The USB 2.0 function only supports the D0 and D3 PCI Power Management states.
Notes regarding the PCH implementation of the Device States:
1. The EHC hardware does not inherently consume any more power when it is in the
D0 state than it does in the D3 state. However, software is required to suspend or
disable all ports prior to entering the D3 state such that the maximum power
consumption is reduced.
2. In the D0 state, all implemented EHC features are enabled.
3. In the D3 state, accesses to the EHC memory-mapped I/O range will master abort.
Note that, since the Debug Port uses the same memory range, the Debug Port is
only operational when the EHC is in the D0 state.
4. In the D3 state, the EHC interrupt must never assert for any reason. The internal
PME# signal is used to signal wake events, etc.
5. When the Device Power State field is written to D0 from D3, an internal reset is
generated. See section EHC Resets for general rules on the effects of this reset.
6. Attempts to write any other value into the Device Power State field other than 00b
(D0 state) and 11b (D3 state) will complete normally without changing the current
value in this field.
5.18.7.4 ACPI System States
The EHC behavior as it relates to other power management states in the system is
summarized in the following list:
The System is always in the S0 state when the EHC is in the D0 state. However,
when the EHC is in the D3 state, the system may be in any power management
state (including S0).
When in D0, the Pause feature (See Section 5.18.7.1) enables dynamic processor
low-power states to be entered.
The PLL in the EHC is disabled when entering the S3/S4/S5 states (core power
turns off).
All core well logic is reset in the S3/S4/S5 states.
5.18.8 USB 2.0 Legacy Keyboard Operation
The PCH must support the possibility of a keyboard downstream from either a full-
speed/low-speed or a high-speed port. The description of the legacy keyboard support
is unchanged from USB 1.1.
The EHC provides the basic ability to generate SMIs on an interrupt event, along with
more sophisticated control of the generation of SMIs.
Datasheet 219
Functional Description
5.18.9 USB 2.0 Based Debug Port
The PCH supports the elimination of the legacy COM ports by providing the ability for
new debugger software to interact with devices on a USB 2.0 port.
High-level restrictions and features are:
Operational before USB 2.0 drivers are loaded.
Functions even when the port is disabled.
Allows normal system USB 2.0 traffic in a system that may only have one USB port.
Debug Port device (DPD) must be high-speed capable and connect directly to Port 1
and Port 9 on PCH-based systems (such as, the DPD cannot be connected to
Port 1/Port 9 through a hub. When a DPD is detected the PCH EHCI will bypass the
integrated Rate Matching Hub and connect directly to the port and the DPD.).
Debug Port FIFO always makes forward progress (a bad status on USB is simply
presented back to software).
The Debug Port FIFO is only given one USB access per microframe.
The Debug port facilitates operating system and device driver debug. It allows the
software to communicate with an external console using a USB 2.0 connection.
Because the interface to this link does not go through the normal USB 2.0 stack, it
allows communication with the external console during cases where the operating
system is not loaded, the USB 2.0 software is broken, or where the USB 2.0 software is
being debugged. Specific features of this implementation of a debug port are:
Only works with an external USB 2.0 debug device (console).
Implemented for a specific port on the host controller.
Operational anytime the port is not suspended AND the host controller is in D0
power state.
Capability is interrupted when port is driving USB RESET.
5.18.9.1 Theory of Operation
There are two operational modes for the USB debug port:
1. Mode 1 is when the USB port is in a disabled state from the viewpoint of a standard
host controller driver. In Mode 1, the Debug Port controller is required to generate a
“keepalive” packets less than 2 ms apart to keep the attached debug device from
suspending. The keepalive packet should be a standalone 32-bit SYNC field.
2. Mode 2 is when the host controller is running (that is, host controller’s Run/Stop#
bit is 1). In Mode 2, the normal transmission of SOF packets will keep the debug
device from suspending.
Behavioral Rules
1. In both modes 1 and 2, the Debug Port controller must check for software
requested debug transactions at least every 125 microseconds.
2. If the debug port is enabled by the debug driver, and the standard host controller
driver resets the USB port, USB debug transactions are held off for the duration of
the reset and until after the first SOF is sent.
3. If the standard host controller driver suspends the USB port, then USB debug
transactions are held off for the duration of the suspend/resume sequence and until
after the first SOF is sent.
4. The ENABLED_CNT bit in the debug register space is independent of the similar
port control bit in the associated Port Status and Control register.
Functional Description
220 Datasheet
Table 5-39 shows the debug port behavior related to the state of bits in the debug
registers as well as bits in the associated Port Status and Control register.
Table 5-39. Debug Port Behavior
OWNER_CNT ENABLED_CT Port
Enable
Run /
Stop Suspend Debug Port Behavior
0XXXX
Debug port is not being used.
Normal operation.
10XXX
Debug port is not being used.
Normal operation.
1100X
Debug port in Mode 1. SYNC
keepalives sent plus debug
traffic
1101X
Debug port in Mode 2. SOF
(and only SOF) is sent as
keepalive. Debug traffic is
also sent. Note that no other
normal traffic is sent out this
port, because the port is not
enabled.
11100
Invalid. Host controller driver
should never put controller
into this state (enabled, not
running and not suspended).
11101
Port is suspended. No debug
traffic sent.
11110
Debug port in Mode 2. Debug
traffic is interspersed with
normal traffic.
11111
Port is suspended. No debug
traffic sent.
Datasheet 221
Functional Description
5.18.9.1.1 OUT Transactions
An Out transaction sends data to the debug device. It can occur only when the
following are true:
The debug port is enabled
The debug software sets the GO_CNT bit
The WRITE_READ#_CNT bit is set
The sequence of the transaction is:
1. Software sets the appropriate values in the following bits:
—USB_ADDRESS_CNF
—USB_ENDPOINT_CNF
DATA_BUFFER[63:0]
TOKEN_PID_CNT[7:0]
SEND_PID_CNT[15:8]
—DATA_LEN_CNT
WRITE_READ#_CNT: (note: this will always be 1 for OUT transactions)
GO_CNT: (note: this will always be 1 to initiate the transaction)
2. The debug port controller sends a token packet consisting of:
—SYNC
TOKEN_PID_CNT field
USB_ADDRESS_CNT field
—USB_ENDPOINT_CNT field
5-bit CRC field
3. After sending the token packet, the debug port controller sends a data packet
consisting of:
—SYNC
SEND_PID_CNT field
The number of data bytes indicated in DATA_LEN_CNT from the DATA_BUFFER
16-bit CRC
NOTE: A DATA_LEN_CNT value of 0 is valid in which case no data bytes would be
included in the packet.
4. After sending the data packet, the controller waits for a handshake response from
the debug device:
If a handshake is received, the debug port controller:
a. Places the received PID in the RECEIVED_PID_STS field
b. Resets the ERROR_GOOD#_STS bit
c. Sets the DONE_STS bit
If no handshake PID is received, the debug port controller:
a. Sets the EXCEPTION_STS field to 001b
b. Sets the ERROR_GOOD#_STS bit
c. Sets the DONE_STS bit
Functional Description
222 Datasheet
5.18.9.1.2 IN Transactions
An IN transaction receives data from the debug device. It can occur only when the
following are true:
The debug port is enabled
The debug software sets the GO_CNT bit
The WRITE_READ#_CNT bit is reset
The sequence of the transaction is:
1. Software sets the appropriate values in the following bits:
USB_ADDRESS_CNF
—USB_ENDPOINT_CNF
TOKEN_PID_CNT[7:0]
—DATA_LEN_CNT
WRITE_READ#_CNT: (note: this will always be 0 for IN transactions)
GO_CNT: (note: this will always be 1 to initiate the transaction)
2. The debug port controller sends a token packet consisting of:
—SYNC
TOKEN_PID_CNT field
USB_ADDRESS_CNT field
USB_ENDPOINT_CNT field
5-bit CRC field.
3. After sending the token packet, the debug port controller waits for a response from
the debug device.
If a response is received:
The received PID is placed into the RECEIVED_PID_STS field
Any subsequent bytes are placed into the DATA_BUFFER
The DATA_LEN_CNT field is updated to show the number of bytes that were
received after the PID.
4. If a valid packet was received from the device that was one byte in length
(indicating it was a handshake packet), then the debug port controller:
Resets the ERROR_GOOD#_STS bit
Sets the DONE_STS bit
5. If a valid packet was received from the device that was more than one byte in
length (indicating it was a data packet), then the debug port controller:
Transmits an ACK handshake packet
Resets the ERROR_GOOD#_STS bit
Sets the DONE_STS bit
6. If no valid packet is received, then the debug port controller:
Sets the EXCEPTION_STS field to 001b
Sets the ERROR_GOOD#_STS bit
Sets the DONE_STS bit.
Datasheet 223
Functional Description
5.18.9.1.3 Debug Software
Enabling the Debug Port
There are two mutually exclusive conditions that debug software must address as part
of its startup processing:
The EHCI has been initialized by system software
The EHCI has not been initialized by system software
Debug software can determine the current ‘initialized’ state of the EHCI by examining
the Configure Flag in the EHCI USB 2.0 Command Register. If this flag is set, then
system software has initialized the EHCI. Otherwise, the EHCI should not be considered
initialized. Debug software will initialize the debug port registers depending on the
state of the EHCI. However, before this can be accomplished, debug software must
determine which root USB port is designated as the debug port.
Determining the Debug Port
Debug software can easily determine which USB root port has been designated as the
debug port by examining bits 20:23 of the EHCI Host Controller Structural Parameters
register. This 4-bit field represents the numeric value assigned to the debug port (that
is, 0001=port 1).
Debug Software Startup with Non-Initialized EHCI
Debug software can attempt to use the debug port if after setting the OWNER_CNT bit,
the Current Connect Status bit in the appropriate (See Determining the Debug Port
Presence) PORTSC register is set. If the Current Connect Status bit is not set, then
debug software may choose to terminate or it may choose to wait until a device is
connected.
If a device is connected to the port, then debug software must reset/enable the port.
Debug software does this by setting and then clearing the Port Reset bit the PORTSC
register. To ensure a successful reset, debug software should wait at least 50 ms before
clearing the Port Reset bit. Due to possible delays, this bit may not change to 0
immediately; reset is complete when this bit reads as 0. Software must not continue
until this bit reads 0.
If a high-speed device is attached, the EHCI will automatically set the Port Enabled/
Disabled bit in the PORTSC register and the debug software can proceed. Debug
software should set the ENABLED_CNT bit in the Debug Port Control/Status register,
and then reset (clear) the Port Enabled/Disabled bit in the PORTSC register (so that the
system host controller driver does not see an enabled port when it is first loaded).
Debug Software Startup with Initialized EHCI
Debug software can attempt to use the debug port if the Current Connect Status bit in
the appropriate (See Determining the Debug Port) PORTSC register is set. If the
Current Connect Status bit is not set, then debug software may choose to terminate or
it may choose to wait until a device is connected.
If a device is connected, then debug software must set the OWNER_CNT bit and then
the ENABLED_CNT bit in the Debug Port Control/Status register.
Determining Debug Peripheral Presence
After enabling the debug port functionality, debug software can determine if a debug
peripheral is attached by attempting to send data to the debug peripheral. If all
attempts result in an error (Exception bits in the Debug Port Control/Status register
indicates a Transaction Error), then the attached device is not a debug peripheral. If the
debug port peripheral is not present, then debug software may choose to terminate or
it may choose to wait until a debug peripheral is connected.
Functional Description
224 Datasheet
5.18.10 EHCI Caching
EHCI Caching is a power management feature in the USB (EHCI) host controllers which
enables the controller to execute the schedules entirely in cache and eliminates the
need for the DMA engine to access memory when the schedule is idle. EHCI caching
allows the processor to maintain longer C-state residency times and provides
substantial system power savings.
5.18.11 USB Pre-Fetch Based Pause
The Pre-Fetch Based Pause is a power management feature in USB (EHCI) host
controllers to ensure maximum C3/C4 processor power state time with C2 popup. This
feature applies to the period schedule, and works by allowing the DMA engine to
identify periods of idleness and preventing the DMA engine from accessing memory
when the periodic schedule is idle. Typically in the presence of periodic devices with
multiple millisecond poll periods, the periodic schedule will be idle for several frames
between polls.
The USB Pre-Fetch Based Pause feature is disabled by setting bit 4 of EHCI
Configuration Register Section 16.2.1.
5.18.12 Function Level Reset Support (FLR)
The USB EHCI Controllers support the Function Level Reset (FLR) capability. The FLR
capability can be used in conjunction with Intel® Virtualization Technology. FLR allows
an Operating System in a Virtual Machine to have complete control over a device,
including its initialization, without interfering with the rest of the platform. The device
provides a software interface that enables the Operating System to reset the whole
device as if a PCI reset was asserted.
5.18.12.1 FLR Steps
5.18.12.1.1 FLR Initialization
1. A FLR is initiated by software writing a ‘1’ to the Initiate FLR bit.
2. All subsequent requests targeting the Function will not be claimed and will be
Master Abort Immediate on the bus. This includes any configuration, I/O or
Memory cycles, however, the Function shall continue to accept completions
targeting the Function.
5.18.12.1.2 FLR Operation
The Function will Reset all configuration, I/O and memory registers of the Function
except those indicated otherwise and reset all internal states of the Function to the
default or initial condition.
5.18.12.1.3 FLR Completion
The Initiate FLR bit is reset (cleared) when the FLR reset is completed. This bit can be
used to indicate to the software that the FLR reset is completed.
Note: From the time Initiate FLR bit is written to 1, software must wait at least 100 ms before
accessing the function.
Datasheet 225
Functional Description
5.18.13 USB Overcurrent Protection
The PCH has implemented programmable USB Overcurrent signals. The PCH provides a
total of 8 overcurrent pins to be shared across the 14 ports.
Four overcurrent signals have been allocated to the ports in each USB Device:
OC[3:0]# for Device 29 (Ports 0-7)
OC[7:4]# for Device 26 (Ports 8-13)
Each pin is mapped to one or more ports by setting bits in the USBOCM1 and USBOCM2
registers.See Section 10.1.68 and Section 10.1.69. It is system BIOS’ responsibility to
ensure that each port is mapped to only one over current pin. Operation with more
than one overcurrent pin mapped to a port is undefined. It is expected that multiple
ports are mapped to a single overcurrent pin, however they should be connected at the
port and not at the PCH pin. Shorting these pins together may lead to reduced test
capabilities. By default, two ports are routed to each of the OC[6:0]# pins. OC7# is not
used by default.
NOTES:
1. All USB ports routed out of the package must have Overcurrent protection. It is
system BIOS responsibility to ensure all used ports have OC protection.
2. USB Ports that are unused on the system (not routed out from the package) should
not have OC pins assigned to them.
Functional Description
226 Datasheet
5.19 Integrated USB 2.0 Rate Matching Hub
5.19.1 Overview
The PCH has integrated two USB 2.0 Rate Matching Hubs (RMH). One hub is connected
to each of the EHCI controllers as shown in the figure below. The Hubs convert low and
full-speed traffic into high-speed traffic. When the RMHs are enabled, they will appear
to software like an external hub is connected to Port 0 of each EHCI controller. In
addition, port 1 of each of the RMHs is muxed with Port 1 of the EHCI controllers and is
able to bypass the RMH for use as the Debug Port.
The hub operates like any USB 2.0 Discrete Hub and will consume one tier of hubs
allowed by the USB 2.0 Spec. section 4.1.1. A maximum of four additional non-root
hubs can be supported on any of the PCH USB Ports. The RMH will report the following
Vendor ID = 8087h and Product ID = 0020h.
5.19.2 Architecture
A hub consists of three components: the Hub Repeater, the Hub Controller, and the
Transaction Translator.
1. The Hub Repeater is responsible for connectivity setup and tear-down. It also
supports exception handling, such as bus fault detection and recovery and connect/
disconnect detect.
2. The Hub Controller provides the mechanism for host-to-hub communication. Hub-
specific status and control commands permit the host to configure a hub and to
monitor and control its individual downstream facing ports.
3. The Transaction Translator (TT) responds to high-speed split transactions and
translates them to full-/low-speed transactions with full-/low-speed devices
attached on downstream facing ports. There is 1 TT per RMH in the PCH.
See chapter 11 of the USB 2.0 Specification for more details on the architecture of the
hubs.
Figure 5-10. EHCI with USB 2.0 with Rate Matching Hub
Datasheet 227
Functional Description
5.20 SMBus Controller (D31:F3)
The PCH provides an System Management Bus (SMBus) 2.0 host controller as well as
an SMBus Slave Interface. The host controller provides a mechanism for the processor
to initiate communications with SMBus peripherals (slaves). The PCH is also capable of
operating in a mode in which it can communicate with I2C compatible devices.
The PCH can perform SMBus messages with either packet error checking (PEC) enabled
or disabled. The actual PEC calculation and checking is performed in hardware by the
PCH.
The Slave Interface allows an external master to read from or write to the PCH. Write
cycles can be used to cause certain events or pass messages, and the read cycles can
be used to determine the state of various status bits. The PCH’s internal host controller
cannot access the PCH’s internal Slave Interface.
The PCH SMBus logic exists in Device 31:Function 3 configuration space, and consists
of a transmit data path, and host controller. The transmit data path provides the data
flow logic needed to implement the seven different SMBus command protocols and is
controlled by the host controller. The PCH’s SMBus controller logic is clocked by RTC
clock.
The SMBus Address Resolution Protocol (ARP) is supported by using the existing host
controller commands through software, except for the new Host Notify command
(which is actually a received message).
The programming model of the host controller is combined into two portions: a PCI
configuration portion, and a system I/O mapped portion. All static configuration, such
as the I/O base address, is done using the PCI configuration space. Real-time
programming of the Host interface is done in system I/O space.
The PCH SMBus host controller checks for parity errors as a target. If an error is
detected, the detected parity error bit in the PCI Status Register (Device 31:Function
3:Offset 06h:bit 15) is set. If bit 6 and bit 8 of the PCI Command Register (Device
31:Function 3:Offset 04h) are set, an SERR# is generated and the signaled SERR# bit
in the PCI Status Register (bit 14) is set.
5.20.1 Host Controller
The SMBus host controller is used to send commands to other SMBus slave devices.
Software sets up the host controller with an address, command, and, for writes, data
and optional PEC; and then tells the controller to start. When the controller has finished
transmitting data on writes, or receiving data on reads, it generates an SMI# or
interrupt, if enabled.
The host controller supports 8 command protocols of the SMBus interface (see System
Management Bus (SMBus) Specification, Version 2.0): Quick Command, Send Byte,
Receive Byte, Write Byte/Word, Read Byte/Word, Process Call, Block Read/Write, Block
Write–Block Read Process Call, and Host Notify.
The SMBus host controller requires that the various data and command fields be setup
for the type of command to be sent. When software sets the START bit, the SMBus Host
controller performs the requested transaction, and interrupts the processor (or
generates an SMI#) when the transaction is completed. Once a START command has
been issued, the values of the “active registers” (Host Control, Host Command,
Transmit Slave Address, Data 0, Data 1) should not be changed or read until the
interrupt status message (INTR) has been set (indicating the completion of the
command). Any register values needed for computation purposes should be saved prior
to issuing of a new command, as the SMBus host controller updates all registers while
completing the new command.
Functional Description
228 Datasheet
The PCH supports the System Management Bus (SMBus) Specification, Version 2.0.
Slave functionality, including the Host Notify protocol, is available on the SMBus pins.
The SMLink and SMBus signals can be tied together externally depending on TCO mode
used. See Section 5.14.2 for more details.
Using the SMB host controller to send commands to the PCH SMB slave port is not
supported.
5.20.1.1 Command Protocols
In all of the following commands, the Host Status Register (offset 00h) is used to
determine the progress of the command. While the command is in operation, the
HOST_BUSY bit is set. If the command completes successfully, the INTR bit will be set
in the Host Status Register. If the device does not respond with an acknowledge, and
the transaction times out, the DEV_ERR bit is set. If software sets the KILL bit in the
Host Control Register while the command is running, the transaction will stop and the
FAILED bit will be set.
Quick Command
When programmed for a Quick Command, the Transmit Slave Address Register is sent.
The PEC byte is never appended to the Quick Protocol. Software should force the
PEC_EN bit to 0 when performing the Quick Command. Software must force the
I2C_EN bit to 0 when running this command. See section 5.5.1 of the System
Management Bus (SMBus) Specification, Version 2.0 for the format of the protocol.
Send Byte / Receive Byte
For the Send Byte command, the Transmit Slave Address and Device Command
Registers are sent. For the Receive Byte command, the Transmit Slave Address Register
is sent. The data received is stored in the DATA0 register. Software must force the
I2C_EN bit to 0 when running this command.
The Receive Byte is similar to a Send Byte, the only difference is the direction of data
transfer. See sections 5.5.2 and 5.5.3 of the System Management Bus (SMBus)
Specification, Version 2.0 for the format of the protocol.
Write Byte/Word
The first byte of a Write Byte/Word access is the command code. The next 1 or 2 bytes
are the data to be written. When programmed for a Write Byte/Word command, the
Transmit Slave Address, Device Command, and Data0 Registers are sent. In addition,
the Data1 Register is sent on a Write Word command. Software must force the I2C_EN
bit to 0 when running this command. See section 5.5.4 of the System Management Bus
(SMBus) Specification, Version 2.0 for the format of the protocol.
Read Byte/Word
Reading data is slightly more complicated than writing data. First the PCH must write a
command to the slave device. Then it must follow that command with a repeated start
condition to denote a read from that device's address. The slave then returns 1 or 2
bytes of data. Software must force the I2C_EN bit to 0 when running this command.
When programmed for the read byte/word command, the Transmit Slave Address and
Device Command Registers are sent. Data is received into the DATA0 on the read byte,
and the DAT0 and DATA1 registers on the read word. See section 5.5.5 of the System
Management Bus (SMBus) Specification, Version 2.0 for the format of the protocol.
Datasheet 229
Functional Description
Process Call
The process call is so named because a command sends data and waits for the slave to
return a value dependent on that data. The protocol is simply a Write Word followed by
a Read Word, but without a second command or stop condition.
When programmed for the Process Call command, the PCH transmits the Transmit
Slave Address, Host Command, DATA0 and DATA1 registers. Data received from the
device is stored in the DATA0 and DATA1 registers. The Process Call command with
I2C_EN set and the PEC_EN bit set produces undefined results. Software must force
either I2C_EN or PEC_EN to 0 when running this command. See section 5.5.6 of the
System Management Bus (SMBus) Specification, Version 2.0 for the format of the
protocol.
Note: For process call command, the value written into bit 0 of the Transmit Slave Address
Register (SMB I/O register, offset 04h) needs to be 0.
Note: If the I2C_EN bit is set, the protocol sequence changes slightly: the Command Code
(bits 18:11 in the bit sequence) are not sent - as a result, the slave will not
acknowledge (bit 19 in the sequence).
Block Read/Write
The PCH contains a 32-byte buffer for read and write data which can be enabled by
setting bit 1 of the Auxiliary Control register at offset 0Dh in I/O space, as opposed to a
single byte of buffering. This 32-byte buffer is filled with write data before
transmission, and filled with read data on reception. In the PCH, the interrupt is
generated only after a transmission or reception of 32 bytes, or when the entire byte
count has been transmitted/received.
Note: When operating in I2C mode (I2C_EN bit is set), the PCH will never use the 32-byte
buffer for any block commands.
The byte count field is transmitted but ignored by the PCH as software will end the
transfer after all bytes it cares about have been sent or received.
For a Block Write, software must either force the I2C_EN bit or both the PEC_EN and
AAC bits to 0 when running this command.
The block write begins with a slave address and a write condition. After the command
code the PCH issues a byte count describing how many more bytes will follow in the
message. If a slave had 20 bytes to send, the first byte would be the number 20 (14h),
followed by 20 bytes of data. The byte count may not be 0. A Block Read or Write is
allowed to transfer a maximum of 32 data bytes.
When programmed for a block write command, the Transmit Slave Address, Device
Command, and Data0 (count) registers are sent. Data is then sent from the Block Data
Byte register; the total data sent being the value stored in the Data0 Register. On block
read commands, the first byte received is stored in the Data0 register, and the
remaining bytes are stored in the Block Data Byte register. See section 5.5.7 of the
System Management Bus (SMBus) Specification, Version 2.0 for the format of the
protocol.
Note: For Block Write, if the I2C_EN bit is set, the format of the command changes slightly.
The PCH will still send the number of bytes (on writes) or receive the number of bytes
(on reads) indicated in the DATA0 register. However, it will not send the contents of the
DATA0 register as part of the message. Also, the Block Write protocol sequence
changes slightly: the Byte Count (bits 27:20 in the bit sequence) are not sent - as a
result, the slave will not acknowledge (bit 28 in the sequence).
Functional Description
230 Datasheet
I2C Read
This command allows the PCH to perform block reads to certain I2C devices, such as
serial E2PROMs. The SMBus Block Read supports the 7-bit addressing mode only.
However, this does not allow access to devices using the I2C “Combined Format” that
has data bytes after the address. Typically these data bytes correspond to an offset
(address) within the serial memory chips.
Note: This command is supported independent of the setting of the I2C_EN bit. The I2C Read
command with the PEC_EN bit set produces undefined results. Software must force
both the PEC_EN and AAC bit to 0 when running this command.
For I2C Read command, the value written into bit 0 of the Transmit Slave Address
Register (SMB I/O register, offset 04h) needs to be 0.
The format that is used for the command is shown in Table 5-40.
The PCH will continue reading data from the peripheral until the NAK is received.
Table 5-40. I2C Block Read
Bit Description
1Start
8:2 Slave Address—7 bits
9Write
10 Acknowledge from slave
18:11 Send DATA1 register
19 Acknowledge from slave
20 Repeated Start
27:21 Slave Address—7 bits
28 Read
29 Acknowledge from slave
37:30 Data byte 1 from slave—8 bits
38 Acknowledge
46:39 Data byte 2 from slave—8 bits
47 Acknowledge
Data bytes from slave / Acknowledge
Data byte N from slave—8 bits
NOT Acknowledge
–Stop
Datasheet 231
Functional Description
Block Write–Block Read Process Call
The block write-block read process call is a two-part message. The call begins with a
slave address and a write condition. After the command code the host issues a write
byte count (M) that describes how many more bytes will be written in the first part of
the message. If a master has 6 bytes to send, the byte count field will have the value 6
(0000 0110b), followed by the 6 bytes of data. The write byte count (M) cannot be 0.
The second part of the message is a block of read data beginning with a repeated start
condition followed by the slave address and a Read bit. The next byte is the read byte
count (N), which may differ from the write byte count (M). The read byte count (N)
cannot be 0.
The combined data payload must not exceed 32 bytes. The byte length restrictions of
this process call are summarized as follows:
•M 1 byte
•N 1 byte
•M + N 32 bytes
The read byte count does not include the PEC byte. The PEC is computed on the total
message beginning with the first slave address and using the normal PEC
computational rules. It is highly recommended that a PEC byte be used with the Block
Write-Block Read Process Call. Software must do a read to the command register
(offset 2h) to reset the 32 byte buffer pointer prior to reading the block data register.
Note that there is no STOP condition before the repeated START condition, and that a
NACK signifies the end of the read transfer.
Note: E32B bit in the Auxiliary Control register must be set when using this protocol.
See section 5.5.8 of the System Management Bus (SMBus) Specification, Version 2.0
for the format of the protocol.
5.20.2 Bus Arbitration
Several masters may attempt to get on the bus at the same time by driving the
SMBDATA line low to signal a start condition. The PCH continuously monitors the
SMBDATA line. When the PCH is attempting to drive the bus to a 1 by letting go of the
SMBDATA line, and it samples SMBDATA low, then some other master is driving the bus
and the PCH will stop transferring data.
If the PCH sees that it has lost arbitration, the condition is called a collision. The PCH
will set the BUS_ERR bit in the Host Status Register, and if enabled, generate an
interrupt or SMI#. The processor is responsible for restarting the transaction.
When the PCH is a SMBus master, it drives the clock. When the PCH is sending address
or command as an SMBus master, or data bytes as a master on writes, it drives data
relative to the clock it is also driving. It will not start toggling the clock until the start or
stop condition meets proper setup and hold time. The PCH will also ensure minimum
time between SMBus transactions as a master.
Note: The PCH supports the same arbitration protocol for both the SMBus and the System
Management (SMLink) interfaces.
Functional Description
232 Datasheet
5.20.3 Bus Timing
5.20.3.1 Clock Stretching
Some devices may not be able to handle their clock toggling at the rate that the PCH as
an SMBus master would like. They have the capability of stretching the low time of the
clock. When the PCH attempts to release the clock (allowing the clock to go high), the
clock will remain low for an extended period of time.
The PCH monitors the SMBus clock line after it releases the bus to determine whether
to enable the counter for the high time of the clock. While the bus is still low, the high
time counter must not be enabled. Similarly, the low period of the clock can be
stretched by an SMBus master if it is not ready to send or receive data.
5.20.3.2 Bus Time Out (The PCH as SMBus Master)
If there is an error in the transaction, such that an SMBus device does not signal an
acknowledge, or holds the clock lower than the allowed time-out time, the transaction
will time out. The PCH will discard the cycle and set the DEV_ERR bit. The time out
minimum is 25 ms (800 RTC clocks). The time-out counter inside the PCH will start
after the last bit of data is transferred by the PCH and it is waiting for a response.
The 25 ms timeout counter will not count under the following conditions:
1. BYTE_DONE_STATUS bit (SMBus I/O Offset 00h, bit 7) is set
2. The SECOND_TO_STS bit (TCO I/O Offset 06h, bit 1) is not set (this indicates that
the system has not locked up).
5.20.4 Interrupts / SMI#
The PCH SMBus controller uses PIRQB# as its interrupt pin. However, the system can
alternatively be set up to generate SMI# instead of an interrupt, by setting the
SMBUS_SMI_EN bit (Device 31:Function 0:Offset 40h:bit 1).
Table 5-42 and Table 5-43 specify how the various enable bits in the SMBus function
control the generation of the interrupt, Host and Slave SMI, and Wake internal signals.
The rows in the tables are additive, which means that if more than one row is true for a
particular scenario then the Results for all of the activated rows will occur.
Table 5-41. Enable for SMBALERT#
Event
INTREN
(Host Control
I/O Register,
Offset 02h,
Bit 0)
SMB_SMI_EN
(Host
Configuration
Register,
D31:F3:Offset
40h, Bit 1)
SMBALERT_DIS
(Slave Command
I/O Register,
Offset 11h, Bit 2)
Result
SMBALERT#
asserted low
(always reported
in Host Status
Register, Bit 5)
XX XWake generated
X1 0
Slave SMI#
generated
(SMBUS_SMI_STS)
10 0
Interrupt
generated
Datasheet 233
Functional Description
5.20.5 SMBALERT#
SMBALERT# is multiplexed with GPIO[11]. When enable and the signal is asserted, the
PCH can generate an interrupt, an SMI#, or a wake event from S1–S5.
5.20.6 SMBus CRC Generation and Checking
If the AAC bit is set in the Auxiliary Control register, the PCH automatically calculates
and drives CRC at the end of the transmitted packet for write cycles, and will check the
CRC for read cycles. It will not transmit the contents of the PEC register for CRC. The
PEC bit must not be set in the Host Control register if this bit is set, or unspecified
behavior will result.
If the read cycle results in a CRC error, the DEV_ERR bit and the CRCE bit in the
Auxiliary Status register at offset 0Ch will be set.
Table 5-42. Enables for SMBus Slave Write and SMBus Host Events
Event
INTREN (Host Control
I/O Register, Offset
02h, Bit 0)
SMB_SMI_EN (Host
Configuration Register,
D31:F3:Offset 40h, Bit1)
Event
Slave Write to Wake/
SMI# Command XX
Wake generated when
asleep.
Slave SMI# generated when
awake (SMBUS_SMI_STS).
Slave Write to
SMLINK_SLAVE_SMI
Command
XX
Slave SMI# generated when
in the S0 state
(SMBUS_SMI_STS)
Any combination of
Host Status Register
[4:1] asserted
0XNone
1 0 Interrupt generated
11Host SMI# generated
Table 5-43. Enables for the Host Notify Command
HOST_NOTIFY_INTREN
(Slave Control I/O
Register, Offset 11h, bit
0)
SMB_SMI_EN (Host
Config Register,
D31:F3:Off40h, Bit 1)
HOST_NOTIFY_WKEN
(Slave Control I/O
Register, Offset 11h, bit
1)
Result
0X0None
XX1Wake generated
1 0 X Interrupt generated
11X
Slave SMI#
generated
(SMBUS_SMI_STS)
Functional Description
234 Datasheet
5.20.7 SMBus Slave Interface
The PCH SMBus Slave interface is accessed using the SMBus. The SMBus slave logic will
not generate or handle receiving the PEC byte and will only act as a Legacy Alerting
Protocol device. The slave interface allows the PCH to decode cycles, and allows an
external microcontroller to perform specific actions. Key features and capabilities
include:
Supports decode of three types of messages: Byte Write, Byte Read, and Host
Notify.
Receive Slave Address register: This is the address that the PCH decodes. A default
value is provided so that the slave interface can be used without the processor
having to program this register.
Receive Slave Data register in the SMBus I/O space that includes the data written
by the external microcontroller.
Registers that the external microcontroller can read to get the state of the PCH.
Status bits to indicate that the SMBus slave logic caused an interrupt or SMI# due
to the reception of a message that matched the slave address.
Bit 0 of the Slave Status Register for the Host Notify command
Bit 16 of the SMI Status Register (Section 13.8.3.9) for all others
Note: The external microcontroller should not attempt to access the PCH SMBus slave logic
until either:
800 milliseconds after both: RTCRST# is high and RSMRST# is high, OR
The PLTRST# de-asserts
If a master leaves the clock and data bits of the SMBus interface at 1 for 50 µs or more
in the middle of a cycle, the PCH slave logic's behavior is undefined. This is interpreted
as an unexpected idle and should be avoided when performing management activities
to the slave logic.
Note: When an external microcontroller accesses the SMBus Slave Interface over the SMBus
a translation in the address is needed to accommodate the least significant bit used for
read/write control. For example, if the PCH slave address (RCV_SLVA) is left at 44h
(default), the external micro controller would use an address of 88h/89h (write/read).
5.20.7.1 Format of Slave Write Cycle
The external master performs Byte Write commands to the PCH SMBus Slave I/F. The
“Command” field (bits 11:18) indicate which register is being accessed. The Data field
(bits 20:27) indicate the value that should be written to that register.
Table 5-44 has the values associated with the registers.
Table 5-44. Slave Write Registers (Sheet 1 of 2)
Register Function
0Command Register. See Table 5-45 below for legal values written to this
register.
1–3 Reserved
4 Data Message Byte 0
5 Data Message Byte 1
Datasheet 235
Functional Description
NOTE: The external microcontroller is responsible to make sure that it does not update the
contents of the data byte registers until they have been read by the system processor. The
PCH overwrites the old value with any new value received. A race condition is possible
where the new value is being written to the register just at the time it is being read. The
PCH will not attempt to cover this race condition (that is, unpredictable results in this
case).
.
6–7 Reserved
8 Reserved
9–FFh Reserved
Table 5-44. Slave Write Registers (Sheet 2 of 2)
Register Function
Table 5-45. Command Types
Command
Type Description
0 Reserved
1
WAKE/SMI#. This command wakes the system if it is not already awake. If
system is already awake, an SMI# is generated.
NOTE: The SMB_WAK_STS bit will be set by this command, even if the system is
already awake. The SMI handler should then clear this bit.
2Unconditional Powerdown. This command sets the PWRBTNOR_STS bit, and
has the same effect as the Powerbutton Override occurring.
3
HARD RESET WITHOUT CYCLING: This command causes a hard reset of the
system (does not include cycling of the power supply). This is equivalent to a write
to the CF9h register with bits 2:1 set to 1, but bit 3 set to 0.
4
HARD RESET SYSTEM. This command causes a hard reset of the system
(including cycling of the power supply). This is equivalent to a write to the CF9h
register with bits 3:1 set to 1.
5
Disable the TCO Messages. This command will disable the PCH from sending
Heartbeat and Event messages (as described in Section 5.14). Once this command
has been executed, Heartbeat and Event message reporting can only be re-
enabled by assertion and de-assertion of the RSMRST# signal.
6WD RELOAD: Reload watchdog timer.
7 Reserved
8
SMLINK_SLV_SMI. When the PCH detects this command type while in the S0
state, it sets the SMLINK_SLV_SMI_STS bit (see Section 13.9.5). This command
should only be used if the system is in an S0 state. If the message is received
during S1–S5 states, the PCH acknowledges it, but the SMLINK_SLV_SMI_STS bit
does not get set.
NOTE: It is possible that the system transitions out of the S0 state at the same
time that the SMLINK_SLV_SMI command is received. In this case, the
SMLINK_SLV_SMI_STS bit may get set but not serviced before the system
goes to sleep. Once the system returns to S0, the SMI associated with this
bit would then be generated. Software must be able to handle this scenario.
9–FFh Reserved
Functional Description
236 Datasheet
5.20.7.2 Format of Read Command
The external master performs Byte Read commands to the PCH SMBus Slave interface.
The “Command” field (bits 18:11) indicate which register is being accessed. The Data
field (bits 30:37) contain the value that should be read from that register.
Table 5-46. Slave Read Cycle Format
Bit Description Driven by Comment
1 Start External Microcontroller
2-8 Slave Address - 7 bits External Microcontroller Must match value in Receive Slave
Address register
9 Write External Microcontroller Always 0
10 ACK PCH
11-18 Command code – 8 bits External Microcontroller
Indicates which register is being
accessed. See Table 5 -4 7 below
for list of implemented registers.
19 ACK PCH
20 Repeated Start External Microcontroller
21-27 Slave Address - 7 bits External Microcontroller Must match value in Receive Slave
Address register
28 Read External Microcontroller Always 1
29 ACK PCH
30-37 Data Byte PCH
Value depends on register being
accessed. Table 5-47 below for list
of implemented registers.
38 NOT ACK External Microcontroller
39 Stop External Microcontroller
Table 5-47. Data Values for Slave Read Registers (Sheet 1 of 2)
Register Bits Description
07:0
Reserved for capabilities indication. Should always return 00h. Future
chips may return another value to indicate different capabilities.
12:0
System Power State
000 = S0 001 = S1 010 = Reserved 011 = S3
100 = S4 101 = S5 110 = Reserved 111 = Reserved
7:3 Reserved
23:0 Reserved
7:4 Reserved
35:0
Watchdog Timer current value Note that Watchdog Timer has 10 bits,
but this field is only 6 bits. If the current value is greater than 3Fh, the
PCH will always report 3Fh in this field.
7:6 Reserved
40
1 = The Intruder Detect (INTRD_DET) bit is set. This indicates that the
system cover has probably been opened.
11 = BTI Temperature Event occurred. This bit will be set if the PCH’s
THRM# input signal is active. Else this beat will read “0.
Datasheet 237
Functional Description
2 DOA Processor Status. This bit will be 1 to indicate that the processor is
dead
31 = SECOND_TO_STS bit set. This bit will be set after the second time-
out (SECOND_TO_STS bit) of the Watchdog Timer occurs.
6:4 Reserved. Will always be 0, but software should ignore.
7
Reflects the value of the GPIO[11]/SMBALERT# pin (and is dependent
upon the value of the GPI_INV[11] bit. If the GPI_INV[11] bit is 1, then
the value in this bit equals the level of the GPI[11]/SMBALERT# pin
(high = 1, low = 0).
If the GPI_INV[11] bit is 0, then the value of this bit will equal the inverse
of the level of the GPIO[11]/SMBALERT# pin (high = 0, low = 1).
5 0
FWH bad bit. This bit will be 1 to indicate that the FWH read returned
FFh, which indicates that it is probably blank.
1 Reserved
2CPU Power Failure Status: ‘1’ if the CPUPWR_FLR bit in the
GEN_PMCON_2 register is set.
3
INIT3_3V# due to receiving Shutdown message: This event is
visible from the reception of the shutdown message until a platform reset
is done if the Shutdown Policy Select bit (SPS) is configured to drive
INIT3_3V#. When the SPS bit is configured to generate PLTRST# based
on shutdown, this register bit will always return 0.
Events on signal will not create a event message
4Reserved
5
POWER_OK_BAD: Indicates the failure core power well ramp during
boot/resume. This bit will be active if the SLP_S3# pin is de-asserted and
PWROK pin is not asserted.
6
Thermal Trip: This bit will shadow the state of processor Thermal Trip
status bit (CTS) (16.2.1.2, GEN_PMCON_2, bit 3). Events on signal will
not create a event message
7
Reserved: Default value is “X”
NOTE: Software should not expect a consistent value when this bit is read
through SMBUS/SMLink
67:0
Contents of the Message 1 register. See Section 13.9.8 for the description
of this register.
77:0
Contents of the Message 2 register. See Section 13.9.8 for the description
of this register.
87:0
Contents of the TCO_WDCNT register. See Section 13.9.9 for the
description of this register.
97:0Seconds of the RTC
A 7:0 Minutes of the RTC
B7:0Hours of the RTC
C 7:0 “Day of Week” of the RTC
D 7:0 “Day of Month” of the RTC
E 7:0 Month of the RTC
F 7:0 Year of the RTC
10h–FFh 7:0 Reserved
Table 5-47. Data Values for Slave Read Registers (Sheet 2 of 2)
Register Bits Description
Functional Description
238 Datasheet
5.20.7.2.1 Behavioral Notes
According to SMBus protocol, Read and Write messages always begin with a Start bit –
Address– Write bit sequence. When the PCH detects that the address matches the
value in the Receive Slave Address register, it will assume that the protocol is always
followed and ignore the Write bit (bit 9) and signal an Acknowledge during bit 10. In
other words, if a Start –Address–Read occurs (which is illegal for SMBus Read or Write
protocol), and the address matches the PCH’s Slave Address, the PCH will still grab the
cycle.
Also according to SMBus protocol, a Read cycle contains a Repeated
Start–Address–Read sequence beginning at bit 20. Once again, if the Address matches
the PCH’s Receive Slave Address, it will assume that the protocol is followed, ignore bit
28, and proceed with the Slave Read cycle.
Note: An external microcontroller must not attempt to access the PCH’s SMBus Slave logic
until at least 1 second after both RTCRST# and RSMRST# are de-asserted (high).
5.20.7.3 Slave Read of RTC Time Bytes
The PCH SMBus slave interface allows external SMBus master to read the internal RTC’s
time byte registers.
The RTC time bytes are internally latched by the PCH’s hardware whenever RTC time is
not changing and SMBus is idle. This ensures that the time byte delivered to the slave
read is always valid and it does not change when the read is still in progress on the bus.
The RTC time will change whenever hardware update is in progress, or there is a
software write to the RTC time bytes.
The PCH SMBus slave interface only supports Byte Read operation. The external SMBus
master will read the RTC time bytes one after another. It is software’s responsibility to
check and manage the possible time rollover when subsequent time bytes are read.
For example, assuming the RTC time is 11 hours: 59 minutes: 59 seconds. When the
external SMBus master reads the hour as 11, then proceeds to read the minute, it is
possible that the rollover happens between the reads and the minute is read as 0. This
results in 11 hours: 0 minute instead of the correct time of 12 hours: 0 minutes. Unless
it is certain that rollover will not occur, software is required to detect the possible time
rollover by reading multiple times such that the read time bytes can be adjusted
accordingly if needed.
5.20.7.4 Format of Host Notify Command
The PCH tracks and responds to the standard Host Notify command as specified in the
System Management Bus (SMBus) Specification, Version 2.0. The host address for this
command is fixed to 0001000b. If the PCH already has data for a previously-received
host notify command which has not been serviced yet by the host software (as
indicated by the HOST_NOTIFY_STS bit), then it will NACK following the host address
byte of the protocol. This allows the host to communicate non-acceptance to the
master and retain the host notify address and data values for the previous cycle until
host software completely services the interrupt.
Note: Host software must always clear the HOST_NOTIFY_STS bit after completing any
necessary reads of the address and data registers.
Table 5-48 shows the Host Notify format.
Datasheet 239
Functional Description
Table 5-48. Host Notify Format
Bit Description Driven By Comment
1 Start External Master
8:2 SMB Host Address—7 bits External Master Always 0001_000
9 Write External Master Always 0
10 ACK (or NACK) PCH PCH NACKs if HOST_NOTIFY_STS is 1
17:11 Device Address – 7 bits External Master
Indicates the address of the master;
loaded into the Notify Device Address
Register
18 Unused—Always 0 External Master 7-bit-only address; this bit is inserted
to complete the byte
19 ACK PCH
27:20 Data Byte Low—8 bits External Master Loaded into the Notify Data Low Byte
Register
28 ACK PCH
36:29 Data Byte High—8 bits External Master Loaded into the Notify Data High Byte
Register
37 ACK PCH
38 Stop External Master
Functional Description
240 Datasheet
5.21 Thermal Management
5.21.1 Thermal Sensor
The PCH incorporates one on-die Digital thermal sensor (DTS) for thermal
management. The thermal sensor is used for Intel Quiet System Technology (Intel
QST). The QST firmware can internally access the temperature measured by the
sensors and use the data as a factor to determine how to control the fans.
This thermal sensor is located near the DMI interface. The on-die thermal sensor is
placed as close as possible to the hottest on-die location to reduce thermal gradients
and to reduce the error on the sensor trip thresholds. The thermal Sensor trip points
may be programmed to generate various interrupts including SCI, SMI, PCI and other
General Purpose events.
5.21.1.1 Internal Thermal Sensor Operation
The internal thermal sensor reports four trip points: Aux2, Aux, Hot and Catastrophic
trip points in the order of increasing temperature.
Aux, Aux2 Temperature Trip Points
These trip points may be set dynamically if desired and provides an interrupt to ACPI
(or other software) when it is crossed in either direction. These auxiliary temperature
trip points do not automatically cause any hardware throttling but may be used by
software to trigger interrupts. This trip point is set below the Hot temperature trip point
and responses are separately programmable from the hot temperature settings, to
provide incrementally more aggressive actions. Aux and Aux2 trip points are fully
Software programmable during system run-time. Aux2 trip point is set below the Aux
temperature trip point.
Hot Temperature Trip Point
This trip point may be set dynamically if desired and provides an interrupt to ACPI (or
other software) when it is crossed in either direction. Software could optionally set this
as an Interrupt when the temperature exceeds this level setting. Hot trip does not
provide any default hardware based thermal throttling, and is available only as a
customer configurable interrupt when Tj,max has been reached.
Catastrophic Trip Point
This trip point is set at the temperature at which the PCH must be shut down
immediately without any software support. The catastrophic trip point must correspond
to a temperature ensured to be functional for the interrupt generation and Hardware
response. Hardware response using THERMTRIP# would be an unconditional transition
to S5. The catastrophic transition to the S5 state does not enforce a minimum time in
the S5 state. It is assumed that the S5 residence and the reboot sequence cools down
the system. If the catastrophic condition remains when the catastrophic power down
enable bit is set by BIOS, then the system will re-enter S5.
Thermometer Mode
The thermometer is implemented using a counter that starts at 0 and increments
during each sample point until the comparator indicates the temperature is above the
current value. The value of the counter is loaded into a read-only register (Thermal
Sensor Thermometer Read) when the comparator first trips.
Datasheet 241
Functional Description
5.21.1.1.1 Recommended Programming for Available Trip Points
There may be a ±2 °C offset due to thermal gradient between the hot-spot and the
location of the thermal sensor. Trip points should be programmed to account for this
temperature offset between the hot-spot Tj,max and the thermal sensor.
Aux Trip Points should be programmed for software and firmware control using
interrupts.
Hot Trip Point should be set to throttle at 108 °C (Tj,max) due to DTS trim accuracy
adjustments. Hot trip points should also be programmed for a software response.
Catastrophic Trip Point should be set to halt operation to avoid maximum Tj of about
120 °C.
Note: Crossing a trip point in either direction may generate several types of interrupts. Each
trip point has a register that can be programmed to select the type of interrupt to be
generated. Crossing a trip point is implemented as edge detection on each trip point to
generate the interrupts.
5.21.1.1.2 Thermal Sensor Accuracy (Taccuracy)
Taccuracy for the PCH is ±5 °C in the temperature range 90 °C to 120 °C. Taccuracy is
±10 °C for temperatures from 45 °C – 90 °C. The PCH may not operate above +108 °C.
This value is based on product characterization and is not ensured by manufacturing
test.
Software has the ability to program the Tcat, Thot, and Taux trip points, but these trip
points should be selected with consideration for the thermal sensor accuracy and the
quality of the platform thermal solution. Overly conservative (unnecessarily low)
temperature settings may unnecessarily degrade performance due to frequent
throttling, while overly aggressive (dangerously high) temperature settings may fail to
protect the part against permanent thermal damage.
5.21.2 Thermal Reporting Over System Management Link 1
Interface (SMLink1)
SMLink1 interface in the PCH is the SMBus link to an optional external controller. A
SMBus protocol is defined on the PCH to allow compatible devices such as Embedded
Controller (EC) or SIO to obtain system thermal data from sensors integrated into
components on the system using the SMLink1 interface. The sensors that can be
monitored using the SMLink1 include those in the processor, the PCH, and DIMMs with
sensors implemented. This solution allows an external device or controller to use the
system thermal data for system thermal management.
Note: To enable Thermal Reporting, the Thermal Data Reporting enable and processor/PCH/
DIMM temperature read enables have to be set in the Thermal Reporting Control (TRC)
Register (See Section 22.2 for details on the register)
There are 2 uses for the PCH's thermal reporting capability:
1. To provide system thermal data to an external controller. The controller can
manage the fans and other cooling elements based on this data. In addition, the
PCH can be programmed by setting appropriate bits in the Alert Enable (AE)
Register (See Section 22.2 for details on this register) to alert the controller when a
device has gone outside of its temperature limits. The alert causes the assertion of
the PCH TEMP_ALERT# (SATA5GP/GPIO49/TEMP_ALERT#) signal. See
Section 5.21.2.6 for more details.
2. To provide an interface between the external controller and host software. This
software interface has no direct affect on the PCH's thermal collection. It is strictly
a software interface to pass information or data.
Functional Description
242 Datasheet
The PCH responds to thermal requests only when the system is in S0 or S1. Once the
PCH has been programmed, it will start responding to a request while the system is in
S0 or S1.
To implement this thermal reporting capability, the platform is required to have
appropriate Intel® ME firmware, BIOS support, and compatible devices that support the
SMBus protocol.
5.21.2.1 Supported Addresses
The PCH supports 2 addresses: I2C Address for writes and Block Read Address for
reads. These addresses need to be distinct.
The two addresses may be fixed by the external controller, or programmable within the
controller. The addresses used by the PCH are completely programmable.
5.21.2.1.1 I2C Address
This address is used for writes to the PCH.
The address is set by soft straps which are values stored in SPI flash and are
defined by the OEM. The address can be set to any value the platform requires.
This address supports all the writes listed in Table 5-49.
SMBus reads by the external controller to this address are not allowed and result in
indeterminate behavior.
5.21.2.1.2 Block Read Address
This address is used for reads from the PCH.
The address is set by soft straps or BIOS. It can be set to any value the platform
requires.
This address only supports SMBus Block Read command and not Byte or Word
Read.
The Block Read command is supported as defined in the SMBus 2.0 specification,
with the command being 40h, and the byte count being provided by the PCH
following the block read format in the SMBus specification.
Writes are not allowed to this address, and result in indeterminate behavior.
Packet Error Code (PEC) may be enabled or not, which is set up by BIOS.
Datasheet 243
Functional Description
5.21.2.2 I2C Write Commands to the Intel® ME
Table 5-49 lists the write commands supported by the Intel® ME.
All bits in the write commands must be written to the PCH or the operation will be
aborted. For example, for 6-bytes write commands, all 48 bits must be written or the
operation will be aborted.
The command format follows the Block Write format of the SMBus specification.
NOTE: The Status Register (STS register) is only writable by an external controller and readable
by host SW. Whenever the controller writes to this register, an interrupt, if enabled by
BIOS/OS, is sent to the host. The controller must always write a full 48 bits to update this
register. Writes of anything other than 6 bytes result in indeterminate behavior. For bit
definition of this register, see Section 22.2.26 and Section 22.2.29.
5.21.2.3 Block Read Command
The external controller may read thermal information from the PCH using the SMBus
Block Read Command. Byte-read and Word-read SMBus commands are not supported.
Note that the reads use a different address than the writes.
The command format follows the Block Read format of the SMBus spec.
The PCH and external controller are set up by BIOS with the length of the read that is
supported by the platform. The device must always do reads of the lengths set up by
BIOS.
The PCH supports any one of the following lengths: 1, 2, 4, 5, 9, 10, 14 or 20 bytes.
The data always comes in the order described in Table 5-50, where 0 is the first byte
received in time on the SMBus.
Table 5-49. I2C Write Commands to the ME
Transaction Slave
Addr
Data
Byte0
(Commd)
Data
Byte 1
(Byte
Count)
Data
Byte 2
Data
Byte 3
Data
Byte 4
Data
Byte 5
Data
Byte 6
Data
Byte 7
Write STS
Register (See
Note below)
I2C 41h 6h STS
[47:40]
STS
[39:32]
STS
[31:24]
STS
[23:16]
STS
[15:8]
STS
[7:0]
Write
Processor Core
Temp Limits
I2C 42h 4h
Lower
Limit
[15:8]
Lower
Limit
[7:0]
Upper
Limit
[15:8]
Upper
Limit
[7:0]
Write Memory
Controller/
Graphics Temp
Limits
I2C 43h 2h
Lower
Limit
[7:0]
Upper
Limit
[7:0]
Write PCH
Temp Limits I2C 44h 2h
Lower
Limit
[7:0]
Upper
Limit
[7:0]
Write DIMM
Temp Limits I2C 45h 2h
Lower
Limit
[7:0]
Upper
Limit
[7:0]
Write
Processor Core
Power Clamp
I2C 50h 2h
Power
Clamp
[15:8]
Power
Clamp
[7:0]
Functional Description
244 Datasheet
Table 5-50. Block Read Command – Byte Definition (Sheet 1 of 2)
Byte Definition
Byte 0
Maximum temperature, in absolute degrees Celsius (C), of the processor core and
graphics. Note that the PCH is not included in this field.
It is a single byte for the highest temperature between the 2 components. This is
not relative to some max or limit, but is the maximum in absolute degrees.
If both the processor core and memory controller/graphics have errors on the
temperature collection, this field will be FFh.
If either the processor core or memory controller/graphics reports a good temper-
ature, that good temperature is reported in this field.
Read value represents bits [7:0] of PTV (Processor Temperature Value) Register
described in Section 22.2.
NOTE: Requires TRC (Thermal Reporting Control) Register bit [12] to be enabled.
See Section 22.2.
Byte 1
The PCH temp in degrees C.
FFh indicates error condition.
Read value represents bits [7:0] of ITV (Internal Temperature Values) Register
described in Section 22.2.
NOTE: Requires TRC (Thermal Reporting Control) Register bit [5] to be enabled.
See Section 22.2.
Byte 3:2
The processor core temp in degrees C.
See Ta bl e 5 -5 5 for the bit definitions.
Byte 3 has bits [15:8] and Byte 2 has bits[7:0]. See Table 5-54 for Read data
format and definitions.
SMBUS Byte Read value [15:0] represents bits [13:0, 14,15] of CTV1 (Core
Temperature Value1) Register described in Section 22.2.
NOTE: Requires TRC (Thermal Reporting Control) Register bit [7] to be enabled.
See Section 22.2.
Byte 4
The memory controller/graphics temp in degrees C.
FFh indicates error condition
Read value represents bits[15:8] of ITV (Internal Temperature Values) Register
described in Section 22.2.
NOTE: Requires TRC (Thermal Reporting Control) Register bit [4] to be enabled.
See Section 22.2.
Byte 5
Thermal Sensor (TS) on DIMM 0
If DIMM not populated, or if there is no TS on DIMM, value will be 0h
Read value represents bits[7:0] of DTV (DIMM Temperature Values) Register
described in Section 22.2.
NOTE: Requires TRC (Thermal Reporting Control) Register bit [0] to be enabled.
See Section 22.2.
Byte 6
Thermal Sensor (TS) on DIMM 1
If DIMM not populated, or if there is no TS on DIMM, value will be 0h
Read value represents bits[15:8] of DTV (DIMM Temperature Values) Register
described in Section 22.2.
NOTE: Requires TRC (Thermal Reporting Control) Register bit [1] to be enabled.
See Section 22.2.
Byte 7
Thermal Sensor (TS) on DIMM 2
If DIMM not populated, or if there is no TS on DIMM, value will be 0h.
Read value represents bits[23:16] of DTV (DIMM Temperature Values) Register
described in Section 22.2.
NOTE: Requires TRC (Thermal Reporting Control) Register bit [2] to be enabled.
See Section 22.2.
Datasheet 245
Functional Description
A controller that only wants the single highest temperature from the processor core and
memory controller/graphics could read one byte. A 2-byte read would provide both the
PCH and processor temperature. A device that wants each components temperature
would do a 5-byte read and ignore the first byte. A device that also wants DIMM
information would read 9 bytes. If an external controller wanted to read the Host
status, it must read 20 bytes and ignore the first 14. A device can also read the energy
data provided by the processor core by reading 14 bytes.
5.21.2.4 Read Data Format
For each of the data fields an ERROR Code is listed below. This code indicates that the
PCH failed in its access to the device. This would be for the case where the read
returned no data, or some illegal value. In general that would mean the device is
broken. The EC can treat the device that failed the read as broken or with some fail-
safe mechanism.
Byte 8
Thermal Sensor (TS) on DIMM 3
If DIMM not populated, or if there is no TS on DIMM, value will be 0h.
Read value represents bits[31:24] of DTV (DIMM Temperature Values) Register
described in Section 22.2.
NOTE: Requires TRC (Thermal Reporting Control) Register bit [3] to be enabled.
Byte 9
Sequence number. Can be used to check if the PCH's FW or HW is hung. See
Section 5.21.2.9 for usage.
This byte is updated every time the collected data is updated
Read value represents bits[23:16] of ITV (Internal Temperature Values) Register
described in Section 22.2.
Byte 10
Bits [7:0] of the latest read of the processor core’s energy register
NOTE: Requires TRC (Thermal Reporting Control TBARB+1Ah) Register bit [6] to
be enabled.
Byte 11 Bits [15:8] of the latest read of the processor core's energy register
NOTE: Requires TRC (Thermal Reporting Control) Register bit [6] to be enabled.
Byte 12 Bits [23:16] of the latest read of the processor core's energy register
NOTE: Requires TRC (Thermal Reporting Control) Register bit [6] to be enabled.
Byte 13 Bits [31:24] of the latest read of the processor core's energy register
NOTE: Requires TRC (Thermal Reporting Control) Register bit [6] to be enabled.
Byte 19:14
Host Status - This reflects what the host is presently executing. Byte 14 has bits
[7:0], and byte 19 has bits [47:40] of HTS Register.
For bit definition, see Section 22.2.22.
Table 5-50. Block Read Command – Byte Definition (Sheet 2 of 2)
Byte Definition
Functional Description
246 Datasheet
5.21.2.4.1 Processor Core Temperature
The processor core temperature reading on SMLink1 is 16 bits as described in
Table 5-51. The granularity is 1/64th degree.
The Top byte of the SMLink1 reported processor temperature (byte 3 in Table 5-53)
represents the integer component of the data, while top 6 bits of byte 2 represents the
fraction portion of the reported temperature. Bit[1] is unused and Bit[0] is used as an
error flag. This interpretation of the SMLink1 reported temperature differs from the
temperature stored in Core Temperature Value 1 (CTV1) register. See the CTV1 register
in Section 22.2.17 for the interpretation of the fields.
If the processor core polling has been disabled, then the value returned is 0000h. If
there is an error when the PCH reads the data from the processor core, then bit 0 is set
to 1.
The data provided on the SMBus read and the Write Processor Core Temp Limits
command use the format above for their data.
5.21.2.4.2 PCH, Memory Controller/Graphics, and DIMM Temperature
The temperature readings for Bytes 0–1 and 4–8, which are the PCH, DIMM, and
memory controller/graphics temperatures, are 8-bit unsigned values from 0–255. The
minimum granularity supported by the internal thermal sensor is 1 °C. Thus, there are
no fractional values for the PCH, memory controller/graphics, or DIMM temperatures.
Note the sensors used within the components do not support values below 0 degrees,
so this field is treated as 8 bits (0–255) absolute and not 2's complement (-128 to
127).
Devices that are not present or that are disabled will be set to 0h. Devices that have a
failed reading (that is, the read from the device did not return any legal value) will be
set to FFh. A failed reading means that the attempt to read that device returned a
failure. The failure could have been from a bus failure or that the device itself had an
internal failure. For instance, a system may only have one DIMM and it would report
only that one value, and the values for the other DIMMs would all be 00h.
5.21.2.5 Thermal Data Update Rate
The temperature values are updated every 200 ms in the PCH, so reading more often
than that simply returns the same data multiple times. Also, the data may be up to
200 ms old if the external controller reads the data right before the next update
window.
Table 5-51. Processor Core Read Data Definition
Bit Description
15:8
Integer component (0 to 255) of the processor core temperature.
Note the processor core temperature can never be below 0 degrees, so this field is
treated as 8 bits (0-255) absolute and not 2's complement (-128 to 127).
7:2 Fraction Value (in 1/64th).
1Reserved
0
Illegal value or error in reading the processor core.
0 = Reads successful
1 = failure on getting the data from the processor core.
Datasheet 247
Functional Description
5.21.2.6 Temperature Comparator and Alert
The PCH has the ability to alert the external controller when temperatures are out of
range. This is done using the PCH TEMP_ALERT# signal. The alert is a simple
comparator. If any device's temperature is outside the limit range for that device, then
the signal is asserted (electrical low). Note that this alert does not use the
SML1ALERT#.
The PCH supports 4 ranges:
1. Processor core range - upper and lower limit (8 bits each, 6 bits for fraction, in
degrees C).
2. Memory Controller/Graphics range - upper and lower limit (8 bits each, in degrees
C) for memory controller/graphics temperature.
3. PCH range - upper and lower limit (8 bits each, in degrees C) for the PCH
temperature.
4. DIMM range - upper and lower limit (8 bits each, in degrees C), applies to all
DIMMs (up to 4 supported) that are enabled. Disabled (unpopulated) DIMMs do not
participate in the thermal compares.
The comparator checks if the device is within the specified range, including the limits.
For example, a device that is at 100 degrees when the upper limit is 100 will not trigger
the alert. Likewise, a device that is at 70 degrees when the lower limit is 70 will not
trigger the alert.
The compares are done only on devices that have been enabled by BIOS for checking.
Since BIOS knows how many DIMMs and processors are in the system, it enables the
checking only for those devices that are physically present.
The compares are done in firmware, so all the compares are executed in one software
loop and at the end, if there is any out of bound temperature, the PCH’s TEMP_ALERT#
signal is asserted.
When the external controller sees the TEMP_ALERT# signal low, it knows some device
is out of range. It can read the temperatures and then change the limits for the
devices. Note that it may take up to 250 ms before the actual writes cause the signal to
change state. For instance if the processor core is at 105 degrees and the limit is 100,
the alert is triggered. If the controller changes the limits to 110, the TEMP_ALERT#
signal may remain low until the next thermal sampling window (every 200 ms) occurs
and only then go high, assuming the processor core was still within its limits.
At boot, the controller can monitor the TEMP_ALERT# signal state. When BIOS has
finished all the initialization and enabled the temperature comparators, the
TEMP_ALERT# signal will be asserted since the default state of the limit registers is 0h;
hence, when the PCH first reads temperatures, they will be out of range. This is the
positive indication that the external controller may now read thermal information and
get valid data. If the TEMP_ALERT# signal is enabled and not asserted within 30
seconds after PLTRST#, the external controller should assume there is a fatal error and
handle accordingly. In general the TEMP_ALERT# signal will assert within a 1–4
seconds, depending on the actual BIOS implementation and flow.
Note: The TEMP_ALERT# assertion is only valid when PLTRST# is de-asserted. The controller
should mask the state of this signal when PLTRST# is asserted. Since the controller
may be powered even when the PCH and the rest of the platform are not, the signal
may glitch as power is being asserted; thus, the controller should wait until PLTRST#
has de-asserted before monitoring the signal.
Functional Description
248 Datasheet
5.21.2.6.1 Special Conditions
The external controller should have a graceful means of handling the following:
1. TEMP_ALERT# asserts, and the controller reads PCH, but all temperature values
are within limits.
In this case, the controller should assume that by the time the controller could read
the data, it had changed and moved back within the limits.
2. External controller writes new values to temperature limits, but TEMP_ALERT# is
still asserted after several hundred msecs. When read, the values are back within
limits.
In this case, the controller should treat this as case where the temperature
changed and caused TEMP_ALERT# assertion, and then changed again to be back
within limits.
3. There is the case where the external controller writes an update to the limit
register, while the PCH is collecting the thermal information and updating the
thermal registers. The limit change will only take affect when the write completes
and the Intel® ME can process this change. If the Intel® ME is already in the
process of collecting data and doing the compares, then it will continue to use the
old limits during this round of compares, and then use the new limits in the next
compare window.
4. Each SMBus write to change the limits is an atomic operation, but is distinct in
itself. Therefore the external controller could write PCH limit, and then write
memory controller/graphics limit. In the middle of those 2 writes, the thermal
collecting procedure could be called by the Intel® ME, so that the comparisons for
the limits are done with the new PCH limits but the old memory controller/graphics
limits.
Note: The limit writes are done when the SMBus write is complete; therefore, the limits are
updated atomically with respect to the thermal updates and compares. There is never a
case where the compares and the thermal update are interrupted in the middle by the
write of new limits. The thermal updates and compares are done as one non-
interruptible routine, and then the limit writes would change the limit value outside of
that routine.
5.21.2.7 BIOS Set Up
For the PCH to properly report temperature and enable alerts, the BIOS must configure
the PCH at boot or from suspend/resume state by writing the following information to
the PCH MMIO space. This information is NOT configurable using the external controller.
Enables for each of the 4 possible thermal alerts (Processor core, Memory
Controller/Graphics, PCH and DIMM). Note that each DIMM is enabled individually.
Enables for reading DIMM, Processor Core, Memory Controller/Graphics, and PCH
temperatures. Note that each can be enabled individually.
SMBus address to use for each DIMM.
Setting up the temperature calculation equations.
Datasheet 249
Functional Description
5.21.2.8 SMBus Rules
The PCH may NACK an incoming SMBus transaction. In certain cases the PCH will NACK
the address, and in other cases it will NACK the command depending on internal
conditions (such as, errors, busy conditions). Given that most of the cases are due to
internal conditions, the external controller must alias a NACK of the command and a
NACK of the address to the same behavior. The controller must not try to make any
determination of the reason for the NACK, based on the type of NACK (command vs.
address).
The PCH will NACK when it is enabled but busy. The external controller is required to
retry up to 3 times when they are NACK'ed to determine if the FW is busy with a data
update. When the data values are being updated by the Intel® ME, it will force this
NACK to occur so that the data is atomically updated to the external controller. In
reality if there is a NACK because of the PCH being busy, in almost all cases the next
read will succeed since the update internally takes very little time.
The only long delay where there can be a NACK is if the internal Intel® ME engine is
reset. This is due to some extreme error condition and is therefore rare. In this case
the NACK may occur for up to 30 seconds. After that, the external controller must
assume that the PCH will never return good data. Even in the best of cases, when this
internal reset occurs, it will always be a second or 2 to re-enable responding.
5.21.2.8.1 During Block Read
On the Block Read, the PCH will respect the NACK and Stop indications from the
external controller, but will consider this an error case. It will recover from this case
and correctly handle the next SMBus request.
The PCH will honor STOP during the block read command and cease providing data. On
the next Block Read, the data will start with byte 0 again. However, this is not a
recommended usage except for 'emergency cases'. In general the external controller
should read the entire length of data that was originally programmed.
5.21.2.8.2 Power On
On the Block Read, the PCH will respect the NACK and Stop indications from the
external controller, but will consider this an error case. It will recover from this case
and correctly handle the next SMBus request.
The PCH will honor STOP during the block read command and cease providing data. On
the next Block Read, the data will start with byte 0 again. However, this is not a
recommended usage except for 'emergency cases'. In general the external controller
should read the entire length of data that was originally programmed.
Functional Description
250 Datasheet
5.21.2.9 Case for Considerations
Below are some corner cases and some possible actions that the external controller
could take.
Note that a 1-byte sequence number is available to the data read by the external
controller. Each time the PCH updates the thermal information it will increment the
sequence number. The external controller can use this value as an indication that the
thermal FW is actually operating. Note that the sequence number will roll over to 00h
when it reaches FFh.
1. Power on:
The PCH will not respond to any SMBus activity (on SMLink1 interface) until it
has loaded the thermal Firmware (FW), which in general would take 1–4
seconds. During this period, the PCH will NACK any SMBus transaction from the
external controller.
The load should take 1-4 seconds, but the external controller should design for
30 seconds based on long delays for S4 resume which takes longer than normal
power up. This would be an extreme case, but for larger memory footprints and
non-optimized recovery times, 30 seconds is a safe number to use for the
timeout.
Recover/Failsafe: if the PCH has not responded within 30 seconds, the external
controller can assume that the system has had a major error and the external
controller should ramp the fans to some reasonably high value.
The only recover from this is an internal reset on the PCH, which is not visible
to the external controller. Therefore the external controller might choose to poll
every 10-60 seconds (some fairly long period) hereafter to see if the PCH's
thermal reporting has come alive.
2. The PCH Thermal FW hangs and requires an internal reset which is not visible to
the external controller.
The PCH will NACK any SMBus transaction from the external controller. The PCH
may not be able to respond for up to 30 seconds while the FW is being reset and
reconfigured.
The external controller could choose to poll every 1-10 seconds to see if the
thermal FW has been successfully reset and is now providing data.
General recovery for this case is about 1 second, but 30 seconds should be used
by the external controller at the timeout.
Recovery/Failsafe: same as in case #1.
3. Fatal PCH error, causes a global reset of all components.
When there is a fatal PCH error, a global reset may occur, and then case #1
applies.
The external controller can observe, if desired, PLTRST# assertion as an
indication of this event.
4. The PCH thermal FW fails or is hung, but no reset occurs.
The sequence number will not be updated, so the external controller knows to
go to failsafe after some number of reads (8 or so) return the same sequence
number.
The external controller could choose to poll every 1-10 seconds to see if the
thermal FW has been successfully reset and working again.
In the absence of other errors, the updates for the sequence number should
never be longer than 400 ms, so the number of reads needed to indicate that
there is a hang should be at around 2 seconds. But when there is an error, the
sequence number may not get updated for seconds. In the case that the
Datasheet 251
Functional Description
external controller sees a NACK from the PCH, then it should restart its sequence
counter, or otherwise be aware that the NACK condition needs to be factored into
the sequence number usage.
The use of sequence numbers is not required, but is provided as a means to
ensure correct PCH FW operation.
5. When the PCH updates the Block Read data structure, the external controller gets a
NACK during this period.
To ensure atomicity of the SMBus data read with respect to the data itself, when
the data buffer is being updated, the PCH will NACK the Block Read transaction.
The update is only a few micro-seconds, so very short in terms of SMBus polling
time; therefore, the next read should be successful. The external controller
should attempt 3 reads to handle this condition before moving on.
If the Block read has started (that is, the address is ACK'ed) then the entire read
will complete successfully, and the PCH will update the data only after the SMBus
read has completed.
6. System is going from S0 to S3/4/5. Note that the thermal monitoring FW is fully
operational if the system is in S0/S1, so the following only applies to S3/4/5.
When the PCH detects the OS request to go to S3/4/5, it will take the SMLink1
controller offline as part of the system preparation. The external controller will
see a period where its transactions are getting NACK'ed, and then see SLP_S3#
assert.
This period is relatively short (a couple of seconds depending on how long all the
devices take to place themselves into the D3 state), and would be far less than
the 30 second limit mentioned above.
7. TEMP_ALERT#—Since there can be an internal reset, the TEMP_ALERT# may get
asserted after the reset. The external controller must accept this assertion and
handle it.
5.21.2.9.1 Example Algorithm for Handling Transaction
One algorithm for the transaction handling could be summarized as follows. This is just
an example to illustrate the above rules. There could be other algorithms that can
achieve the same results.
1. Perform SMBus transaction.
2. If ACK, then continue.
3. If NACK:
a. Try again for 2 more times, in case the PCH is busy updating data.
b. If 3 successive transactions receive NACK, then:
- Ramp fans, assuming some general long reset or failure
- Try every 1-10 seconds to see if SMBus transactions are now working
- If they start then return to step 1
- If they continue to fail, then stay in this step and poll, but keep the fans
ramped up or implement some other failure recovery mechanism
Functional Description
252 Datasheet
5.22 Intel® High Definition Audio Overview (D27:F0)
The PCH High Definition Audio (HDA) controller communicates with the external
codec(s) over the Intel® High Definition Audio serial link. The controller consists of a
set of DMA engines that are used to move samples of digitally encoded data between
system memory and an external codec(s). The PCH implements four output DMA
engines and 4 input DMA engines. The output DMA engines move digital data from
system memory to a D-A converter in a codec. The PCH implements a single Serial
Data Output signal (HDA_SDOUT) that is connected to all external codecs. The input
DMA engines move digital data from the A-D converter in the codec to system memory.
The PCH implements four Serial Digital Input signals (HDA_SDI[3:0]) supporting up to
four codecs.
Audio software renders outbound and processes inbound data to/from buffers in
system memory. The location of individual buffers is described by a Buffer Descriptor
List (BDL) that is fetched and processed by the controller. The data in the buffers is
arranged in a predefined format. The output DMA engines fetch the digital data from
memory and reformat it based on the programmed sample rate, bit/sample and
number of channels. The data from the output DMA engines is then combined and
serially sent to the external codecs over the Intel® High Definition Audio link. The input
DMA engines receive data from the codecs over the Intel® High Definition Audio link
and format the data based on the programmable attributes for that stream. The data is
then written to memory in the predefined format for software to process. Each DMA
engine moves one stream of data. A single codec can accept or generate multiple
streams of data, one for each A-D or D-A converter in the codec. Multiple codecs can
accept the same output stream processed by a single DMA engine.
Codec commands and responses are also transported to and from the codecs using
DMA engines.
The PCH HD audio controller supports the Function Level Reset (FLR).
5.22.1 Intel® High Definition Audio Docking (Mobile Only)
5.22.1.1 Dock Sequence
Note that this sequence is followed when the system is running and a docking event
occurs.
1. Since the PCH supports docking, the Docking Supported (DCKSTS. DS) bit defaults
to a 1. POST BIOS and ACPI BIOS software uses this bit to determine if the HD
Audio controller supports docking. BIOS may write a 0 to this RWO bit during POST
to effectively turn off the docking feature.
2. After reset in the undocked quiescent state, the Dock Attach (DCKCTL.DA) bit and
the Dock Mate (DCKSTS.DM) bit are both de-asserted. The HDA_DOCK_EN# signal
is de-asserted and HDA_DOCK_RST# is asserted. Bit Clock, SYNC and SDO signals
may or may no be running at the point in time that the docking event occurs.
3. The physical docking event is signaled to ACPI BIOS software using ACPI control
methods. This is normally done through a GPIO signal on the PCH and is outside
the scope of this section of the spec.
4. ACPI BIOS software first checks that the docking is supported using DCKSTS.DS=1
and that the DCKSTS.DM=0 and then initiates the docking sequence by writing a 1
to the DCKCTL.DA bit.
5. The HD Audio controller then asserts the HDA_DOCK_EN# signal so that the Bit
Clock signal begins toggling to the dock codec. HDA_DOCK_EN# shall be asserted
synchronously to Bit Clock and timed such that Bit Clock is low, SYNC is low, and
SDO is low. Pull-down resistors on these signals in the docking station discharge
Datasheet 253
Functional Description
the signals low so that when the state of the signal on both sides of the switch is
the same when the switch is turned on. This reduces the potential for charge
coupling glitches on these signals. Note that in the PCH the first 8 bits of the
Command field are “reserved” and always driven to 0's. This creates a predictable
point in time to always assert HDA_DOCK_EN#. Note that the HD Audio link reset
exit specification that requires that SYNC and SDO be driven low during Bit Clock
startup is not ensured. Note also that the SDO and Bit Clock signals may not be low
while HDA_DOCK_RST# is asserted which also violates the spec.
6. After the controller asserts HDA_DOCK_EN# it waits for a minimum of 2400 Bit
Clocks (100us) and then de-asserts HDA_DOCK_RST#. This is done in such a way
to meet the HD Audio link reset exit specification. HDA_DOCK_RST# de-assertion
should be synchronous to Bit Clock and timed such that there are least 4 full Bit
ClockS from the de-assertion of HDA_DOCK_RST# to the first frame SYNC
assertion.
7. The Connect/Turnaround/Address Frame hardware initialization sequence will now
occur on the dock codecs' SDI signals. A dock codec is detected when SDI is high
on the last Bit Clock cycle of the Frame Sync of a Connect Frame. The appropriate
bit(s) in the State Change Status (STATESTS) register will be set. The Turnaround
and Address Frame initialization sequence then occurs on the dock codecs' SDI(s).
8. After this hardware initialization sequence is complete (approximately 32 frames),
the controller hardware sets the DCKSTS.DM bit to 1 indicating that the dock is now
mated. ACPI BIOS polls the DCKSTS.DM bit and when it detects it is set to 1,
conveys this to the OS through a plug-N-play IRP. This eventually invokes the HD
Audio Bus Driver, which then begins it's codec discovery, enumeration, and
configuration process.
9. Alternatively to step #8, the HD Audio Bus Driver may choose to enable an
interrupt by setting the WAKEEN bits for SDINs that didn't originally have codecs
attached to them. When a corresponding STATESTS bit gets set an interrupt will be
generated. In this case the HD Audio Bus Driver is called directly by this interrupt
instead of being notified by the plug-N-play IRP.
10. HD Audio Bus Driver software “discovers” the dock codecs by comparing the bits
now set in the STATESTS register with the bits that were set prior to the docking
event.
5.22.1.2 Exiting D3/CRST# when Docked
1. In D3/CRST#, CRST# is asserted by the HD Audio Bus Driver. CRST# asserted
resets the dock state machines, but does not reset the DCKCTL.DA bit. Because the
dock state machines are reset, the dock is electrically isolated (HDA_DOCK_EN#
de-asserted) and DOCK_RST# is asserted.
2. The Bus Driver clears the STATESTS bits, then de-asserts CRST#, waits
approximately 7ms, then checks the STATESTS bits to see which codecs are
present.
3. When CRST# is de-asserted, the dock state machine detects that DCKCTL.DA is
still set and the controller hardware sequences through steps to electrically connect
the dock by asserting HDA_DOCK_EN# and then eventually de-asserts
DOCK_RST#. This completes within the 7ms mentioned in step 2).
4. The Bus Driver enumerates the codecs present as indicated using the STATESTS
bits.
5. Note that this process did not require BIOS or ACPI BIOS to set the DCKCTL.DA bit.
Functional Description
254 Datasheet
5.22.1.3 Cold Boot/Resume from S3 When Docked
1. When booting and resuming from S3, PLTRST# switches from asserted to de-
asserted. This clears the DCKCTL.DA bit and the dock state machines. Because the
dock state machines are reset, the dock is electrically isolated (HDA_DOCK_EN#
de-asserted) and DOCK_RST# is asserted.
2. POST BIOS detects that the dock is attached and sets the DCKCTL.DA bit to 1. Note
that at this point CRST# is still asserted so the dock state machine will remain in
it's reset state.
3. The Bus Driver clears the STATESTS bits, then de-asserts CRST#, waits
approximately 7ms, then checks the STATESTS bits to see which codecs are
present.
4. When CRST# is de-asserted, the dock state machine detects that DCKCTL.DA is
still set and the controller hardware sequences through steps to electrically connect
the dock by asserting HDA_DOCK_EN# and then eventually de-asserts
DOCK_RST#. This completes within the 7ms mentioned in step 3).
5. The Bus Driver enumerates the codecs present as indicated using the STATESTS
bits.
5.22.1.4 Undock Sequence
There are two possible undocking scenarios. The first is the one that is initiated by the
user that invokes software and gracefully shuts down the dock codecs before they are
undocked. The second is referred to as the “surprise undock” where the user undocks
while the dock codec is running. Both of these situations appear the same to the
controller as it is not cognizant of the “surprise removal”. But both sequences will be
discussed here.
5.22.1.5 Normal Undock
1. In the docked quiescent state, the Dock Attach (DCKCTL.DA) bit and the Dock Mate
(DCKSTS.DM) bit are both asserted. The HDA_DOCK_EN# signal is asserted and
HDA_DOCK_RST# is de-asserted.
2. The user initiates an undock event through the GUI interface or by pushing a
button. This mechanism is outside the scope of this section of the document. Either
way ACPI BIOS software will be invoked to manage the undock process.
3. ACPI BIOS will call the HD Audio Bus Driver software to halt the stream to the dock
codec(s) prior to electrical undocking. If the HD Audio Bus Driver is not capable of
halting the stream to the docked codec, ACPI BIOS will initiate the hardware
undocking sequence as described in the next step while the dock stream is still
running. From this standpoint, the result is similar to the “surprise undock”
scenario where an audio glitch may occur to the docked codec(s) during the undock
process.
4. The ACPI BIOS initiates the hardware undocking sequence by writing a 0 to the
DCKCTL.DA bit.
5. The HD Audio controller asserts HDA_DOCK_RST#. HDA_DOCK_RST# assertion
shall be synchronous to Bit Clock. There are no other timing requirements for
HDA_DOCK_RST# assertion. Note that the HD Audio link reset specification
requirement that the last Frame sync be skipped will not be met.
6. A minimum of 4 Bit Clocks after HDA_DOCK_RST# the controller will de-assert
HDA_DOCK_EN# to isolate the dock codec signals from the PCH HD Audio link
signals. HDA_DOCK_EN# is de-asserted synchronously to Bit Clock and timed such
that Bit Clock, SYNC, and SDO are low.
7. After this hardware undocking sequence is complete the controller hardware clears
the DCKSTS.DM bit to 0 indicating that the dock is now un-mated. ACPI BIOS
software polls DCKSTS.DM and when it sees DM set, conveys to the end user that
physical undocking can proceed. The controller is now ready for a subsequent
docking event.
Datasheet 255
Functional Description
5.22.1.6 Surprise Undock
1. In the surprise undock case the user undocks before software has had the
opportunity to gracefully halt the stream to the dock codec and initiate the
hardware undock sequence.
2. A signal on the docking connector is connected to the switch that isolates the dock
codec signals from the PCH HD Audio link signals (DOCK_DET# in the conceptual
diagram). When the undock event begins to occur the switch will be put into isolate
mode.
3. The undock event is communicated to the ACPI BIOS using ACPI control methods
that are outside the scope of this section of the document.
4. ACPI BIOS software writes a 0 to the DCKCTL.DA bit. ACPI BIOS then calls the HD
Audio Bus Driver using plug-N-play IRP. The Bus Driver then posthumously cleans
up the dock codec stream.
5. The HD Audio controller hardware is oblivious to the fact that a surprise undock
occurred. The flow from this point on is identical to the normal undocking sequence
described in section 0 starting at step 3). It finishes with the hardware clearing the
DCKSTS.DM bit set to 0 indicating that the dock is now un-mated. The controller is
now ready for a subsequent docking event.
5.22.1.7 Interaction Between Dock/Undock and Power Management
States
When exiting from S3, PLTRST# will be asserted. The POST BIOS is responsible for
initiating the docking sequence if the dock is already attached when PLTRST# is de-
asserted. POST BIOS writes a 1 to the DCKCTL.DA bit prior to the HD Audio driver de-
asserting CRTS# and detecting and enumerating the codecs attached to the
HDA_DOCK_RST# signal. The HD Audio controller does not directly monitor a hardware
signal indicating that a dock is attached. Therefore a method outside the scope of this
document must be used to cause the POST BIOS to initiate the docking sequence.
When exiting from D3, CRST# will be asserted. When CRST# bit is “0” (asserted), the
DCKCTL.DA bit is not cleared. The dock state machine will be reset such that
HDA_DOCK_EN# will be de-asserted, HDA_DOCK_RST# will be asserted and the
DCKSTS.DM bit will be cleared to reflect this state. When the CRST# bit is de-asserted,
the dock state machine will detect that DCKCTL.DA is set to “1” and will begin
sequencing through the dock process. Note that this does not require any software
intervention.
5.22.1.8 Relationship between HDA_DOCK_RST# and HDA_RST#
HDA_RST# will be asserted when a PLTRST# occurs or when the CRST# bit is 0. As
long as HDA_RST# is asserted, the DOCK_RST# signal will also be asserted.
When PLTRST# is asserted, the DCKCTL.DA and DCKSTS.DM bits will be get cleared to
their default state (0's), and the dock state machine will be reset such that
HDA_DOCK_EN# will be de-asserted, and HDA_DOCK_RST# will be asserted. After any
PLTRST#, POST BIOS software is responsible for detecting that a dock is attached and
then writing a “1” to the DCKCTL.DA bit prior to the HD Audio Bus Driver de-asserting
CRST#.
When CRST# bit is “0” (asserted), the DCKCTL.DA bit is not cleared. The dock state
machine will be reset such that HDA_DOCK_EN# will be de-asserted,
HDA_DOCK_RST# will be asserted and the DCKSTS.DM bit will be cleared to reflect this
state. When the CRST# bit is de-asserted, the dock state machine will detect that
DCKCTL.DA is set to “1” and will begin sequencing through the dock process. Note that
this does not require any software intervention
Functional Description
256 Datasheet
5.23 Intel® Active Management Technology 6.0
(Intel® AMT)
Intel® Active Management Technology is a set of advanced manageability features
developed to meet the evolving demands placed on IT to manage a network
infrastructure. Intel® AMT reduces the Total Cost of Ownership (TCO) for IT
management through features such as asset tracking, remote manageability, and
robust policy-based security, resulting in fewer desk-side visits and reduced incident
support durations. Intel® AMT extends the manageability capability for IT through Out
Of Band (OOB), allowing asset information, remote diagnostics, recovery, and contain
capabilities to be available on client systems even when they are in a low power, or
“off” state, or in situations when the operating system is hung.
Figure 5-11. PCH Intel® Management Engine High-Level Block Diagram
Datasheet 257
Functional Description
5.23.1 Intel® AMT6.x and ASF 2.0 Features
E-Asset Tag and OOB hardware and software Inventory Logs
OOB Alerts that may trigger one or more aspects of Intel® AM's management and
security features over IPv4, IPv6, and KVM. Available only over wired LAN.
IDE Redirect and Serial over LAN for Remote Control
Remote diagnostics, remote BIOS recovery and update
OS Lock-Up Alert and operating system Repair
Wake capability from lower system power state, including Wake on LAN* (WOL),
Wake on Manageability Packet (WOME), Wake on VOIP (WOV), and Wake on Event
(WOX)
DASH 1.0/1.1 profile compatibility and Microsoft* NAP* posturing
Client Initiated Remote Access (CIRA)—Allows a client on the internet to, at its
request, make itself discoverable on an AMT infrastructure behind a firewall for
remote manageability. Available both over wired and wireless LAN.
•Intel
® Anti-Theft Technology OOB key recovery
5.23.2 Intel® AMT Requirements
Intel® AMT is a platform-level solution that uses multiple system components
including:
•Intel
® AMT-Ready PCH SKU
•Intel
® Gigabit Ethernet PHY (Intel® 82577/82578 Gigabit Platform LAN Connect
device) with Intel® AMT for remote access
SPI flash memory that meets requirements set in Section 5.24.4 (64 Mb minimum
for Intel® AMT 6.0) to store asset information, management software code, and
logs
BIOS to provide asset detection and POST diagnostics (BIOS and Intel® AMT can
optionally share same flash memory device)
An ISV software package - such as LANDesk*, Altiris*, or Microsoft* SMS* - to take
advantage of Intel® AMT’s platform manageability capabilities
Functional Description
258 Datasheet
5.24 Serial Peripheral Interface (SPI)
The Serial Peripheral Interface (SPI) is a 4-pin interface that provides a lower-cost
alternative for system flash versus the Firmware Hub on the LPC bus.
The 4-pin SPI interface consists of clock (CLK), master data out (Master Out Slave In
(MOSI)), master data in (Master In Slave Out (MISO)) and an active low chip select
(SPI_CS[1:0]#).
The PCH supports up to two SPI flash devices using two separate Chip Select pins. Each
SPI flash device can be up to 16 MBytes. The PCH SPI interface supports 20 MHz,
33MHz, and 50 MHz SPI devices. A SPI Flash device on with Chip Select 0 with a valid
descriptor MUST be attached directly to the PCH.
Communication on the SPI bus is done with a Master – Slave protocol. The Slave is
connected to the PCH and is implemented as a tri-state bus.
Note: If Boot BIOS Strap =’00’ LPC is selected as the location for BIOS. BIOS may still be
placed on LPC, but all platforms with the PCH requires SPI flash connected directly to
the PCH's SPI bus with a valid descriptor connected to Chip select 0 to boot.
Note: When SPI is selected by the Boot BIOS Destination Strap and a SPI device is detected
by the PCH, LPC based BIOS flash is disabled.
5.24.1 SPI Supported Feature Overview
SPI Flash on the PCH has two operational modes, descriptor and non-descriptor.
5.24.1.1 Non-Descriptor Mode
Non-Descriptor Mode is not supported as a valid flash descriptor is required for all PCH
Platforms.
5.24.1.2 Descriptor Mode
Descriptor Mode is required for all SKUs of the PCH. It enables many new features of
the chipset:
Integrated Gigabit Ethernet and Host processor for Gigabit Ethernet Software
•Intel
® Active Management Technology
•Intel
® Quiet System Technology
•Intel
® Management Engine Firmware
PCI Express* root port configuration
Supports up to two SPI components using two separate chip select pins
Hardware enforced security restricting master accesses to different regions
Chipset Soft Strap regions provides the ability to use Flash NVM as an alternative to
hardware pull-up/pull-down resistors for the PCH and Processor
Supports the SPI Fast Read instruction and frequencies of up to 33 MHz
Uses standardized Flash Instruction Set
Datasheet 259
Functional Description
5.24.1.2.1 SPI Flash Regions
In Descriptor Mode the Flash is divided into five separate regions:
Only three masters can access the four regions: Host processor running BIOS code,
Integrated Gigabit Ethernet and Host processor running Gigabit Ethernet Software, and
Management Engine. The only required region is Region 0, the Flash Descriptor. Region
0 must be located in the first sector of device 0 (offset 0).
Flash Region Sizes
SPI flash space requirements differ by platform and configuration. The Flash Descriptor
requires one 4 KB or larger block. GbE requires two 4 KB or larger blocks. The amount
of flash space consumed is dependent on the erase granularity of the flash part and the
platform requirements for the ME and BIOS regions. The Intel ME region contains
firmware to support Intel Active Management Technology and other Intel ME
capabilities.
Region Content
0 Flash Descriptor
1BIOS
2 Management Engine
3 Gigabit Ethernet
4Platform Data
Table 5-52. Region Size versus Erase Granularity of Flash Components
Region Size with 4 KB
Blocks
Size with 8 KB
Blocks
Size with 64 KB
Blocks
Descriptor 4 KB 8 KB 64 KB
GbE 8 KB 16 KB 128 KB
BIOS Varies by Platform Varies by Platform Varies by Platform
ME Varies by Platform Varies by Platform Varies by Platform
Functional Description
260 Datasheet
5.24.1.3 Device Partitioning
The PCH SPI Flash controller supports two sets of attributes in SPI flash space. This
allows for supporting an asymmetric flash component that has two separate sets of
attributes in the upper and lower part of the memory array. An example of this is a
flash part that has different erase granularities in two different parts of the memory
array. This allows for the usage of two separate flash vendors if using two different
flash parts.
5.24.2 Flash Descriptor
The maximum size of the Flash Descriptor is 4 KB. If the block/sector size of the SPI
flash device is greater than 4 KB, the flash descriptor will only use the first 4 KB of the
first block. The flash descriptor requires its own block at the bottom of memory (00h).
The information stored in the Flash Descriptor can only be written during the
manufacturing process as its read/write permissions must be set to Read only when the
computer leaves the manufacturing floor.
The Flash Descriptor is made up of eleven sections (see Figure 5-13).
Figure 5-12. Flash Partition Boundary
Lower
Flash
Partition
Upper Flash
Partition
Flash Partition
Boundary
Datasheet 261
Functional Description
1. The Flash signature selects Descriptor Mode as well as verifies if the flash is
programmed and functioning. The data at the bottom of the flash (offset 0) must be
0FF0A55Ah to be in Descriptor mode.
2. The Descriptor map has pointers to the other five descriptor sections as well as the
size of each.
Figure 5-13. Flash Descriptor Sections
Descriptor
MAP
Component
Signature
Region
Master
PCH Soft
Straps
0
4KB
Management
Engine VSCC
Table
Descriptor
Upper MAP
OEM Section
Reserved
Functional Description
262 Datasheet
3. The component section has information about the SPI flash in the system including:
the number of components, density of each, illegal instructions (such as chip
erase), and frequencies for read, fast read and write/erase instructions.
4. The Region section points to the three other regions as well as the size of each
region.
5. The master region contains the security settings for the flash, granting read/write
permissions for each region and identifying each master by a requestor ID. See
Section 5.24.2.1 for more information.
6 & 7. The Processor and PCH chipset soft strap sections contain Processor and PCH
configurable parameters.
8. The Reserved region between the top of the Processor strap section and the bottom
of the OEM Section is reserved for future chipset usages.
9. The Descriptor Upper MAP determines the length and base address of the
Management Engine VSCC Table.
10. The Management Engine VSCC Table holds the JEDEC ID and the VSCC information
of the entire SPI Flash supported by the NVM image.
11. OEM Section is 256 Bytes reserved at the top of the Flash Descriptor for use by
OEM.
5.24.2.1 Descriptor Master Region
The master region defines read and write access setting for each region of the SPI
device. The master region recognizes three masters: BIOS, Gigabit Ethernet, and
Management Engine. Each master is only allowed to do direct reads of its primary
regions.
Table 5-53. Region Access Control Table
Master Read/Write Access
Region Processor and BIOS ME GbE Controller
Descriptor N/A N/A N/A
BIOS
CPU and BIOS can
always read from and
write to BIOS Region
Read / Write Read / Write
Management
Engine Read / Write
ME can always read
from and write to ME
Region
Read / Write
Gigabit Ethernet Read / Write Read / Write
GbE software can
always read from and
write to GbE region
Platform Data
Region N/A N/A N/A
Datasheet 263
Functional Description
5.24.3 Flash Access
There are two types of flash accesses:
Direct Access:
Masters are allowed to do direct read only of their primary region
Gigabit Ethernet region can only be directly accessed by the Gigabit Ethernet
controller. Gigabit Ethernet software must use Program Registers to access the
Gigabit Ethernet region.
Master's Host or Management Engine virtual read address is converted into the SPI
Flash Linear Address (FLA) using the Flash Descriptor Region Base/Limit registers
Program Register Access:
Program Register Accesses are not allowed to cross a 4 KB boundary and can not
issue a command that might extend across two components
Software programs the FLA corresponding to the region desired
Software must read the devices Primary Region Base/Limit address to create a
FLA.
5.24.3.1 Direct Access Security
Requester ID of the device must match that of the primary Requester ID in the
Master Section
Calculated Flash Linear Address must fall between primary region base/limit
Direct Write not allowed
Direct Read Cache contents are reset to 0's on a read from a different master
Supports the same cache flush mechanism in ICH7 which includes Program
Register Writes
5.24.3.2 Register Access Security
Only primary region masters can access the registers
Note: Processor running Gigabit Ethernet software can access Gigabit Ethernet registers
Masters are only allowed to read or write those regions they have read/write
permission
Using the Flash Region Access Permissions, one master can give another master
read/write permissions to their area
Using the five Protected Range registers, each master can add separate read/write
protection above that granted in the Flash Descriptor for their own accesses
Example: BIOS may want to protect different regions of BIOS from being
erased
Ranges can extend across region boundaries
Functional Description
264 Datasheet
5.24.4 Serial Flash Device Compatibility Requirements
A variety of serial flash devices exist in the market. For a serial flash device to be
compatible with the PCH SPI bus, it must meet the minimum requirements detailed in
the following sections.
Note: All PCH platforms have require Intel® Management engine Firmware.
5.24.4.1 PCH SPI Based BIOS Requirements
A serial flash device must meet the following minimum requirements when used
explicitly for system BIOS storage.
Erase size capability of at least one of the following: 64 Kbytes, 8 Kbytes, 4 Kbytes,
or 256 bytes.
Device must support multiple writes to a page without requiring a preceding erase
cycle (see Section 5.24.5).
Serial flash device must ignore the upper address bits such that an address of
FFFFFFh aliases to the top of the flash memory.
SPI Compatible Mode 0 support (clock phase is 0 and data is latched on the rising
edge of the clock).
If the device receives a command that is not supported or incomplete (less than 8
bits), the device must complete the cycle gracefully without any impact on the flash
content.
An erase command (page, sector, block, chip, etc.) must set all bits inside the
designated area (page, sector, block, chip, etc.) to 1 (Fh).
Status Register bit 0 must be set to 1 when a write, erase or write to status register
is in progress and cleared to 0 when a write or erase is NOT in progress.
Devices requiring the Write Enable command mst automatically clear the Write
Enable Latch at the end of Data Program instructions.
Byte write must be supported. The flexibility to perform a write between 1 byte to
64 bytes is recommended.
Hardware Sequencing requirements are optional in BIOS only platforms.
SPI flash parts that do not meet Hardware sequencing command set requirements
may work in BIOS only platforms using software sequencing.
5.24.4.2 Integrated LAN Firmware SPI Flash Requirements
A serial flash device that will be used for system BIOS and Integrated LAN or
Integrated LAN only must meet all the SPI Based BIOS Requirements plus:
Hardware sequencing.
4, 8, or 64 KB erase capability must be supported.
5.24.4.2.1 SPI Flash Unlocking Requirements for Integrated LAN
BIOS must ensure there is no SPI flash based read/write/erase protection on the GbE
region. GbE firmware and drivers for the integrated LAN need to be able to read, write
and erase the GbE region at all times.
Datasheet 265
Functional Description
5.24.4.3 Intel® Management Engine Firmware SPI Flash Requirements
Intel® Management Engine Firmware must meet the SPI flash based BIOS
Requirements plus:
Hardware Sequencing.
Flash part must be uniform 4 KB erasable block throughout the entire device or
have 64 KB blocks with the first block (lowest address) divided into 4 KB or 8 KB
blocks.
Write protection scheme must meet SPI flash unlocking requirements for
Management Engine.
5.24.4.3.1 SPI Flash Unlocking Requirements for Management Engine
Flash devices must be globally unlocked (read, write and erase access on the ME
region) from power on by writing 00h to the flash’s status register to disable write
protection.
If the status register must be unprotected, it must use the enable write status register
command 50h or write enable 06h.
Opcode 01h (write to status register) must then be used to write a single byte of 00h
into the status register. This must unlock the entire part. If the SPI flash’s status
register has non-volatile bits that must be written to, bits [5:2] of the flash’s status
register must be all 0h to indicate that the flash is unlocked.
If bits [5:2] return a non zero values, the Intel® ME firmware will send a write of 00h to
the status register. This must keep the flash part unlocked.
If there is no need to execute a write enable on the status register, then opcodes 06h
and 50h must be ignored.
After global unlock, BIOS has the ability to lock down small sections of the flash as long
as they do not involve the ME or GbE region.
5.24.4.4 Hardware Sequencing Requirements
Table 5-54 contains a list of commands and the associated opcodes that a SPI-based
serial flash device must support to be compatible with hardware sequencing.
Table 5-54. Hardware Sequencing Commands and Opcode Requirements (Sheet 1 of 2)
Commands Opcode Notes
Write to Status Register 01h
Writes a byte to SPI flash’s status register. Enable Write
to Status Register command must be run prior to this
command.
Program Data 02h Single byte or 64 byte write as determined by flash part
capabilities and software.
Read Data 03h
Write Disable 04h
Read Status 05h Outputs contents of SPI flash’s status register
Write Enable 06h
Fast Read 0Bh
Enable Write to Status
Register
50h or
60h
Enables a bit in the status register to allow an update to
the status register
Functional Description
266 Datasheet
5.24.4.4.1 JEDEC ID
Since each serial flash device may have unique capabilities and commands, the JEDEC
ID is the necessary mechanism for identifying the device so the uniqueness of the
device can be comprehended by the controller (master). The JEDEC ID uses the opcode
9Fh and a specified implementation and usage model. This JEDEC Standard
Manufacturer and Device ID read method is defined in Standard JESD21-C, PRN03-NV.
5.24.5 Multiple Page Write Usage Model
The system BIOS and Intel® Management Engine firmware usage models require that
the serial flash device support multiple writes to a page (minimum of 512 writes)
without requiring a preceding erase command. BIOS commonly uses capabilities such
as counters that are used for error logging and system boot progress logging. These
counters are typically implemented by using byte-writes to ‘increment’ the bits within a
page that have been designated as the counter. The Intel® ME firmware usage model
requires the capability for multiple data updates within any given page. These data
updates occur using byte-writes without executing a preceding erase to the given page.
Both the BIOS and Intel® ME firmware multiple page write usage models apply to
sequential and non-sequential data writes.
Note: This usage model requirement is based on any given bit only being written once from a
‘1’ to a ‘0’without requiring the preceding erase. An erase would be required to change
bits back to the 1 state.
5.24.5.1 Soft Flash Protection
There are two types of flash protection that are not defined in the flash descriptor
supported by PCH:
1. BIOS Range Write Protection
2. SMI#-Based Global Write Protection
Both mechanisms are logically OR’d together such that if any of the mechanisms
indicate that the access should be blocked, then it is blocked. Table 5-55 provides a
summary of the mechanisms.
A blocked command will appear to software to finish, except that the Blocked Access
status bit is set in this case.
Erase Program
mable 256B, 4 Kbyte, 8 Kbyte or 64 Kbyte
Full Chip Erase C7h
JEDEC ID 9Fh See Section 5.24.4.4.1.
Table 5-54. Hardware Sequencing Commands and Opcode Requirements (Sheet 2 of 2)
Commands Opcode Notes
Table 5-55. Flash Protection Mechanism Summary
Mechanism Accesses
Blocked
Range
Specific?
Reset-Override
or SMI#-
Override?
Equivalent Function on
FWH
BIOS Range
Write Protection Writes Yes Reset Override FWH Sector Protection
Write Protect Writes No SMI# Override Same as Write Protect in
Intel® ICHs for FWH
Datasheet 267
Functional Description
5.24.5.2 BIOS Range Write Protection
The PCH provides a method for blocking writes to specific ranges in the SPI flash when
the Protected BIOS Ranges are enabled. This is achieved by checking the Opcode type
information (which can be locked down by the initial Boot BIOS) and the address of the
requested command against the base and limit fields of a Write Protected BIOS range.
Note: Once BIOS has locked down the Protected BIOS Range registers, this mechanism
remains in place until the next system reset.
5.24.5.3 SMI# Based Global Write Protection
The PCH provides a method for blocking writes to the SPI flash when the Write
Protected bit is cleared (that is, protected). This is achieved by checking the Opcode
type information (which can be locked down by the initial Boot BIOS) of the requested
command.
The Write Protect and Lock Enable bits interact in the same manner for SPI BIOS as
they do for the FWH BIOS.
5.24.6 Flash Device Configurations
The PCH-based platform must have a SPI flash connected directly to the PCH with a
valid descriptor and Intel® Management Engine Firmware. BIOS may be stored in other
locations such as Firmware Hub and SPI flash hooked up directly to an embedded
controller for Mobile platforms. Note this will not avoid the direct SPI flash connected to
PCH requirement.
5.24.7 SPI Flash Device Recommended Pinout
The table below contains the recommended serial flash device pin-out for an 8-pin
device. Use of the recommended pin-out on an 8-pin device reduces complexities
involved with designing the serial flash device onto a motherboard and allows for
support of a common footprint usage model (see Section 5.24.8.1).
Although an 8-pin device is preferred over a 16-pin device due to footprint
compatibility, the following table contains the recommended serial flash device pin-out
for a 16-pin SOIC.
Table 5-56. Recommended Pinout for 8-Pin Serial Flash Device
Pin # Signal
1Chips Select
2 Data Output
3 Write Protect
4 Ground
5 Data Input
6Serial Clock
7Hold / Reset
8 Supply Voltage
Functional Description
268 Datasheet
5.24.8 Serial Flash Device Package
5.24.8.1 Common Footprint Usage Model
To minimize platform motherboard redesign and to enable platform Bill of Material
(BOM) selectability, many PC System OEM’s design their motherboard with a single
common footprint. This common footprint allows population of a soldered down device
or a socket that accepts a leadless device. This enables the board manufacturer to
support, using selection of the appropriate BOM, either of these solutions on the same
system without requiring any board redesign.
The common footprint usage model is desirable during system debug and by flash
content developers since the leadless device can be easily removed and reprogrammed
without damage to device leads. When the board and flash content is mature for high-
volume production, both the socketed leadless solution and the soldered down leaded
solution are available through BOM selection.
5.24.8.2 Serial Flash Device Package Recommendations
It is highly recommended that the common footprint usage model be supported. An
example of how this can be accomplished is as follows:
The recommended pinout for 8-pin serial flash devices is used (see
Section 5.24.7).
The 8-pin device is supported in either an 8-contact VDFPN (6x5 mm MLP) package
or an 8-contact WSON (5x6 mm) package. These packages can fit into a socket
that is land pattern compatible with the wide body SO8 package.
The 8-pin device is supported in the SO8 (150 mil) and in the wide-body SO8
(200 mil) packages.
The 16-pin device is supported in the SO16 (300 mil) package.
Table 5-57. Recommended Pinout for 16-Pin Serial Flash Device
Pin # Signal Pin # Signal
1 Hold / Reset 9 Write Protect
2 Supply Voltage 10 Ground
3 No Connect 11 No Connect
4 No Connect 12 No Connect
5 No Connect 13 No Connect
6 No Connect 14 No Connect
7 Chip Select 15 Serial Data In
8 Serial Data Out 16 Serial Clock
Datasheet 269
Functional Description
5.25 Intel® Quiet System Technology (Intel® QST)
(Desktop Only)
The PCH implements 4 PWM and 4 TACH signals for Intel® Quiet System Technology
(QST).
Note: Intel® Quiet System Technology functionality requires a correctly configured system,
including an appropriate processor, PCH with Intel® ME, Intel® ME Firmware, and
system BIOS support.
5.25.1 PWM Outputs
This signal is driven as open-drain. An external pull-up resistor is integrated into the
fan to provide the rising edge of the PWM output signal. The PWM output is driven low
during reset, which represents 0% duty cycle to the fans. After reset de-assertion, the
PWM output will continue to be driven low until one of the following occurs:
The internal PWM control register is programmed to a non-zero value by the Intel®
QST firmware.
The watchdog timer expires (enabled and set at 4 seconds by default).
The polarity of the signal is inverted by the Intel® QST firmware.
Note that if a PWM output will be programmed to inverted polarity for a particular fan,
then the low voltage driven during reset represents 100% duty cycle to the fan.
5.25.2 TACH Inputs
This signal is driven as an open-collector or open-drain output from the fan. An
external pull-up is expected to be implemented on the motherboard to provide the
rising edge of the TACH input. This signal has analog hysteresis and digital filtering due
to the potentially slow rise and fall times. This signal has a weak internal pull-up
resistor to keep the input buffer from floating if the TACH input is not connected to a
fan.
5.26 Feature Capability Mechanism
A set of registers is included in the PCH LPC Interface (Device 31, Function 0, offset
E0h–EBh) that allows the system software or BIOS to easily determine the features
supported by the PCH. These registers can be accessed through LPC PCI configuration
space, thus allowing for convenient single point access mechanism for chipset feature
detection.
This set of registers consists of:
Capability ID (FDCAP)
Capability Length (FDLEN)
Capability Version and Vendor-Specific Capability ID (FDVER)
Feature Vector (FVECT)
Functional Description
270 Datasheet
5.27 PCH Display Interfaces and Intel® Flexible Display
Interconnect
Display is divided between processor and PCH. The processor houses memory
interface, display planes, and pipes while PCH has transcoder and display interface or
ports. Intel® FDI connects the processor and PCH display engine. The number of
planes, pipes, and transcoders decide the number of simultaneous and concurrent
display devices that can be driven on a platform.
The PCH integrates one Analog, LVDS (mobile only) and three Digital Ports B, C, and D.
Each Digital Port can transmit data according to one or more protocols. Digital Port B, C
and D can be configured to drive natively HDMI, DisplayPort or DVI. Digital Port B also
supports Serial Digital Video Out (SDVO) that converts one protocol to another. Digital
Port D can be configured to drive natively Embedded DisplayPort (eDP). Each display
port has control signals that may be used to control, configure and/or determine the
capabilities of an external device.
The PCH’s Analog Port uses an integrated 340.4 MHz RAMDAC that can directly drive a
standard progressive scan analog monitor up to a resolution of 2048x1536 pixels with
32-bit color at 75 Hz.
The PCH SDVO port (configured through Digital Port B) is capable of driving a 200 MP
(Megapixels/second) rate.
Each Digital Port is capable of driving resolutions up to 2560x1600 at 60 Hz through
DisplayPort and 1920x1200 at 60 Hz using HDMI or DVI (with reduced blanking).
5.27.1 Analog Display Interface Characteristics
The Analog Port provides a RGB signal output along with a HSYNC and VSYNC signal.
There is an associated Display Data Channel (DDC) signal pair that is implemented
using GPIO pins dedicated to the Analog Port. The intended target device is for a moni-
tor with a VGA connector. Display devices such as LCD panels with analog inputs may
work satisfactory but no functionality added to the signals to enhance that capability.
Figure 5-14. Analog Port Characteristics
Datasheet 271
Functional Description
5.27.1.1 Integrated RAMDAC
The display function contains a RAM-based Digital-to-Analog Converter (RAMDAC) that
transforms the digital data from the graphics and video subsystems to analog data for
the VGA monitor. The PCH’s integrated 340.4 MHz RAMDAC supports resolutions up to
2048x 1536 @ 75 Hz. Three 8-bit DACs provide the R, G, and B signals to the monitor.
5.27.1.1.1 Sync Signals
HSYNC and VSYNC signals are digital and conform to TTL signal levels at the connector.
Since these levels cannot be generated internal to the device, external level shifting
buffers are required. These signals can be polarity adjusted and individually disabled in
one of the two possible states. The sync signals should power up disabled in the high
state. No composite sync or special flat panel sync support are included.
5.27.1.1.2 VESA/VGA Mode
VESA/VGA mode provides compatibility for pre-existing software that set the display
mode using the VGA CRTC registers. Timings are generated based on the VGA register
values and the timing generator registers are not used.
5.27.1.2 DDC (Display Data Channel)
DDC is a standard defined by VESA. Its purpose is to allow communication between the
host system and display. Both configuration and control information can be exchanged
allowing plug- and-play systems to be realized. Support for DDC 1 and 2 is
implemented. The PCH uses the DDC_CLK and DDC_DATA signals to communicate with
the analog monitor. The PCH will generate these signals at 2.5 V. External pull-up
resistors and level shifting circuitry should be implemented on the board.
5.27.2 Digital Display Interfaces
The PCH can drive a number of digital interfaces natively. The Digital Ports B, C, and/or
D can be configured to drive HDMI, DVI, DisplayPort, and Embedded DisplayPort (port
D only). The PCH provides a dedicated port for Digital Port LVDS (mobile only).
5.27.2.1 LVDS (Mobile only)
LVDS for flat panel is compatible with the ANSI/TIA/EIA-644 specification. This is an
electrical standard only defining driver output characteristics and receiver input
characteristics.
Each channel supports transmit clock frequency ranges from 25 MHz to 112 MHz, which
provides a throughput of up to 784 Mbps on each data output and up to 112 MP/s on
the input. When using both channels, each carry a portion of the data; thus, doubling
the throughput to a maximum theoretical pixel rate of 224 MP/s.
There are two LVDS transmitter channels (Channel A and Channel B) in the LVDS
interface. Channel A and Channel B consist of 4-data pairs and a clock pair each.
The LVDS data pair is used to transfer pixel data as well as the LCD timing control
signals.
Figure 5-15 shows a pair of LVDS signals and swing voltage.
Functional Description
272 Datasheet
Logic values of 1s and 0s are represented by the differential voltage between the pair
of signals. As shown in the Figure 5-16 a serial pattern of 1100011 represents one
cycle of the clock.
5.27.2.2 LVDS Pair States
The LVDS pairs can be put into one of five states:
•Active
•Powered down Hi-Z
Powered down 0 V
•Common mode
•Send zeros
When in the active state, several data formats are supported. When in powered down
state, the circuit enters a low power state and drives out 0V or the buffer is in the Hi-Z
state on both the output pins for the entire channel. The common mode Hi-Z state is
both pins of the pair set to the common mode voltage. When in the send zeros state,
the circuit is powered up but sends only zero for the pixel color data regardless what
the actual data is with the clock lines and timing signals sending the normal clock and
timing data.
The LVDS Port can be enabled/disabled using software. A disabled port enters a low
power state. Once the port is enabled, individual driver pairs may be disabled based on
the operating mode. Disabled drivers can be powered down for reduced power
consumption or optionally fixed to forced 0s output.
Individual pairs or sets of LVDS pairs can be selectively powered down when not being
used. The panel power sequencing can be set to override the selected power state of
the drivers during power sequencing.
Figure 5-15. LVDS Signals and Swing Voltage
Figure 5-16. LVDS Clock and Data Relationship
Datasheet 273
Functional Description
5.27.2.3 Single Channel versus Dual Channel Mode
In the single channel mode, only Channel-A is used. Channel-B cannot be used for
single channel mode. In the dual channel mode, both Channel-A and Channel-B pins
are used concurrently to drive one LVDS display.
In Single Channel mode, Channel A can take 18 bits of RGB pixel data, plus 3 bits of
timing control (HSYNC/VSYNC/DE) and output them on three differential data pair
outputs; or 24 bits of RGB (plus 4 bits of timing control) output on four differential data
pair outputs. A dual channel interface converts 36 or 48 bits of color information plus
the 3 or 4 bits of timing control respectively and outputs it on six or eight sets of
differential data outputs respectively.
Dual Channel mode uses twice the number of LVDS pairs and transfers the pixel data at
twice the rate of the single channel. In general, one channel will be used for even pixels
and the other for odd pixel data. The first pixel of the line is determined by the display
enable going active and that pixel will be sent out Channel-A. All horizontal timings for
active, sync, and blank will be limited to be on two pixel boundaries in the two channel
modes.
Note: Platforms using the PCH for integrated graphics support 24-bpp display panels of Type
1 only (compatible with VESA LVDS color mapping).
5.27.2.4 Panel Power Sequencing
This section provides details for the power sequence timing relationship of the panel
power, the backlight enable and the LVDS data timing delivery. to meet the panel power
timing specification requirements two signals, LFP_VDD_EN and LFP_BKLT_EN, are
provided to control the timing sequencing function of the panel and the backlight power
supplies.
A defined power sequence is recommended when enabling the panel or disabling the
panel. The set of timing parameters can vary from panel to panel vendor, provided that
they stay within a predefined range of values. The panel VDD power, the backlight on/
off state and the LVDS clock and data lines are all managed by an internal power
sequencer.
NOTE: Support for programming parameters TX and T1 through T5 using software is provided.
Figure 5-17. Panel Power Sequencing
Power On Sequence from off state and
Power Off Sequence after full On
Panel VDD
Enable
Panel
BackLight
Enable
Clock/Data Lines
T1+T2 T5 T3
Valid
T4
Panel
On
Off Off
TX
T4
Functional Description
274 Datasheet
5.27.2.5 LVDS DDC
The display pipe selected by the LVDS display port is programmed with the panel timing
parameters that are determined by installed panel specifications or read from an
onboard EDID ROM. The programmed timing values are then ‘locked’ into the registers
to prevent unwanted corruption of the values. From that point on, the display modes
are changed by selecting a different source size for that pipe, programming the VGA
registers, or selecting a source size and enabling the VGA.
The LVDS DDC helps to read the panel timing parameters or panel EDID.
5.27.2.6 High Definition Multimedia Interface
The High-Definition Multimedia Interface (HDMI) is provided for transmitting
uncompressed digital audio and video signals from DVD players, set-top boxes and
other audiovisual sources to television sets, projectors and other video displays. It can
carry high quality multi-channel audio data and all standard and high-definition
consumer electronics video formats. HDMI display interface connecting the PCH and
display devices utilizes transition minimized differential signaling (TMDS) to carry
audiovisual information through the same HDMI cable.
HDMI includes three separate communications channels: TMDS, DDC, and the optional
CEC (consumer electronics control) (not supported by the PCH). As shown in
Figure 5-18, the HDMI cable carries four differential pairs that make up the TMDS data
and clock channels. These channels are used to carry video, audio, and auxiliary data.
In addition, HDMI carries a VESA Display. The DDC channel is used by an HDMI Source
to determine the capabilities and characteristics of the Sink.
Audio, video and auxiliary (control/status) data is transmitted across the three TMDS
data channels. The video pixel clock is transmitted on the TMDS clock channel and is
used by the receiver for data recovery on the three data channels. The digital display
data signals driven natively through the PCH are AC coupled and needs level shifting to
convert the AC coupled signals to the HDMI compliant digital signals.
PCH HDMI interface is designed as per High-Definition Multimedia Interface
Specification 1.4a. The PCH supports High-Definition Multimedia Interface Compliance
Test Specification 1.4a.
Figure 5-18. HDMI Overview
Datasheet 275
Functional Description
5.27.2.7 Digital Video Interface (DVI)
The PCH Digital Ports can be configured to drive DVI-D. DVI uses TMDS for transmitting
data from the transmitter to the receiver which is similar to the HDMI protocol but the
audio and CEC. Refer to the HDMI section for more information on the signals and data
transmission. To drive DVI-I through the back panel the VGA DDC signals is connected
along with the digital data and clock signals from one of the Digital Ports. When a sys-
tem has support for a DVI-I port, then either VGA or the DVI-D through a single DVI-I
connector can be driven but not both simultaneously.
The digital display data signals driven natively through the PCH are AC coupled and
needs level shifting to convert the AC coupled signals to the HDMI compliant digital
signals.
5.27.2.8 Display Port*
DisplayPort is a digital communication interface that utilizes differential signaling to
achieve a high bandwidth bus interface designed to support connections between PCs
and monitors, projectors, and TV displays. DisplayPort is also suitable for display
connections between consumer electronics devices such as high definition optical disc
players, set top boxes, and TV displays.
A DisplayPort consists of a Main Link, Auxiliary channel, and a Hot Plug Detect signal.
The Main Link is a uni-directional, high-bandwidth, and low latency channel used for
transport of isochronous data streams such as uncompressed video and audio. The
Auxiliary Channel (AUX CH) is a half-duplex bidirectional channel used for link
management and device control. The Hot Plug Detect (HPD) signal serves as an
interrupt request for the sink device.
PCH is designed as per VESA DisplayPort Standard Version 1.1a. The PCH supports
VESA DisplayPort* PHY Compliance Test Specification 1.1 and VESA DisplayPort* Link
Layer Compliance Test Specification 1.1.
Note: DisplayPort includes support for Dual-Mode operation.
5.27.2.9 Embedded DisplayPort
Embedded DisplayPort (eDP*) is an embedded version of the DisplayPort standard
oriented towards applications such as notebook and All-In-One PC’s. eDP is supported
only on Digital Port D. Like DisplayPort, Embedded DisplayPort also consists of a Main
Link, Auxiliary channel, and a optional Hot Plug Detect signal.
Figure 5-19. DP Overview
Functional Description
276 Datasheet
The eDP support on desktop PCH is possible because of the addition of the panel power
sequencing pins: L_VDD, L_BKLT_EN and L_BLKT_CTRL. The eDP on the PCH can be
configured for 2 or 4 lanes.
PCH supports Embedded DisplayPort* (eDP*) Standard Version 1.1.
5.27.2.10 DisplayPort Aux Channel
A bi-directional AC coupled AUX channel interface replaces the I2C for EDID read, link
management and device control. I2C-to-Aux bridges are required to connect legacy
display devices.
5.27.2.11 DisplayPort Hot-Plug Detect (HPD)
The PCH supports HPD for Hot-Plug sink events on the HDMI and DisplayPort interface.
5.27.2.12 Integrated Audio over HDMI and DisplayPort
DisplayPort and HDMI interfaces on PCH support audio. Table 5-58 shows the
supported audio technologies on the PCH.
PCH adds support for Silent stream. Silent stream is a integrated audio feature that
enables short audio streams such as system events to be heard over the HDMI and
DisplayPort monitors. PCH supports silent streams over the HDMI and DisplayPort
interfaces at 48 kHz, 96 kHz, and 192 kHz sampling rates.
5.27.2.13 Serial Digital Video Out (SDVO)
Serial Digital Video Out (SDVO) sends display data in serialized format which then can
be converted into appropriate display protocol using a SDVO device. Serial Digital Video
Out (SDVO) supports SDVO-LVDS only on the PCH. Though the SDVO electrical
interface is based on the PCI Express interface, the protocol and timings are completely
unique. The PCH utilizes an external SDVO device to translate from SDVO protocol and
timings to the desired display format and timings.
SDVO is supported only on Digital Port B of the PCH.
Table 5-58. PCH supported Audio formats over HDMI and DisplayPort*
Audio Formats HDMI DisplayPort
AC-3 - Dolby* Digital Yes No
Dolby* Digital Plus Yes No
DTS-HD* Yes No
LPCM, 192 KHz/24 bit, 8 Channel Yes Yes (two channel - up to 96 KHz 24 bit)
Dolby True HD, DTS-HD Master Audio
(Losses Blu-Ray Audio Format) Yes No
Datasheet 277
Functional Description
5.27.2.14 Control Bus
Communication to SDVO registers and if utilized, ADD2 PROMs and monitor DDCs, are
accomplished by using the SDVOCTRLDATA and SDVOCTRLCLK signals through the
SDVO device. These signals run up to 400 kHz and connect directly to the SDVO
device.
The SDVO device is then responsible for routing the DDC and PROM data streams to
the appropriate location. Consult SDVO device data sheets for level shifting
requirements of these signals.
Figure 5-20. SDVO Conceptual Block Diagram
SDVO B
3rd Party
SDVO
External
Device
GREEN B
RED B
BLUE B
TV Clock in
Control Data
Control Clock
Stall
Interrupt
PCH LVDS
Panel
Functional Description
278 Datasheet
5.27.3 Mapping of Digital Display Interface Signals
Table 5-59. PCH Digital Display Port Pin Mapping
Port
Description
DisplayPort
Signals HDMI Signals SDVO Signals PCH Display Port
Pin details
Port B
DPB_LANE3 TMDSB_CLK SDVOB_CLK DDPB_[3]P
DPB_LANE3# TMDSB_CLKB SDVOB_CLK# DDPB_[3]N
DPB_LANE2 TMDSB_DATA0 SDVOB_BLUE DDPB_[2]P
DPB_LANE2# TMDSB_DATA0B SDVOB_BLUE# DDPB_[2]N
DPB_LANE1 TMDSB_DATA1 SDVOB_GREEN DDPB_[1]P
DPB_LANE1# TMDSB_DATA1B SDVOB_GREEN# DDPB_[1]N
DPB_LANE0 TMDSB_DATA2 SDVOB_RED DDPB_[0]P
DPB_LANE0# TMDSB_DATA2B SDVOB_RED* DDPB_[0]N
DPB_HPD TMDSB_HPD DDPB_HPD
DPB_AUX DDPB_AUXP
DPB_AUXB DDPB_AUXN
Port C
DPC_LANE3 TMDSC_CLK DDPC_[3]P
DPC_LANE3# TMDSC_CLKB DDPC_[3]N
DPC_LANE2 TMDSC_DATA0 DDPC_[2]P
DPC_LANE2# TMDSC_DATA0B DDPC_[2]N
DPC_LANE1 TMDSC_DATA1 DDPC_[1]P
DPC_LANE1# TMDSC_DATA1B DDPC_[1]N
DPC_LANE0 TMDSC_DATA2 DDPC_[0]P
DPC_LANE0# TMDSC_DATA2B DDPC_[0]N
DPC_HPD TMDSC_HPD DDPC_HPD
DPC_AUX DDPC_AUXP
DPC_AUXC DDPC_AUXN
port D
DPD_LANE3 TMDSD_CLK DDPD_[3]P
DPD_LANE3# TMDSD_CLKB DDPD_[3]N
DPD_LANE2 TMDSD_DATA0 DDPD_[2]P
DPD_LANE2# TMDSD_DATA0B DDPD_[2]N
DPD_LANE1 TMDSD_DATA1 DDPD_[1]P
DPD_LANE1# TMDSD_DATA1B DDPD_[1]N
DPD_LANE0 TMDSD_DATA2 DDPD_[0]P
DPD_LANE0# TMDSD_DATA2B DDPD_[0]N
DPD_HPD TMDSD_HPD DDPD_HPD
DPD_AUX DDPD_AUXP
DPD_AUXD DDPD_AUXN
Datasheet 279
Functional Description
5.27.4 Multiple Display Configurations
The following multiple display configuration modes are supported (with appropriate
driver software):
Single Display is a mode with one display port activated to display the output to
one display device.
•Intel
® Dual Display Clone is a mode with two display ports activated to drive the
display content of same color depth setting but potentially different refresh rate
and resolution settings to all the active display devices connected.
Extended Desktop is a mode with two display ports activated used to drive the
content with potentially different color depth, refresh rate, and resolution settings
on each of the active display devices connected.
Table 5-61 describes the valid interoperability between display technologies.
5.27.5 High-bandwidth Digital Content Protection (HDCP)
HDCP is the technology for protecting high definition content against unauthorized copy
or unreceptive between a source (computer, digital set top boxes, etc.) and the sink
(panels, monitor and TVs). The PCH supports HDCP 1.4 for content protection over
wired displays (HDMI, DVI and DisplayPort).
The HDCP 1.4 keys are integrated into the PCH and customers are not required to
physically configure or handle the keys.
Table 5-60. Display Co-Existence Table
Display Not
Attached
DAC Integrated
LVDS
Integrated
DisplayPort*
HDMI*/
DVI eDP*
VGA
Not
Attached XS S S S S
DAC VGA SXS
1, C, E A A S1, C, E
Integrated
LVDS SS
1, C, E XS
1, C, E S1, C, E X
Integrated
DisplayPort SAS
1, C, E A A S1, C, E
HDMI/DVI SAS
1, C, E A S1, C, E S1, C, E
SDVO LVDS SS
1, C, E S1, C, E S1, C, E S1, C, E A
eDP SS
1, C, E XS
1, C, E S1, C, E X
A = Single Pipe Single Display, Intel® Dual Display Clone (Only 24-bpp), or Extended Desktop
Mode
C = Clone Mode
E = Extended Desktop Mode
S = Single Pipe Single Display
•S
1 = Single Pipe Single Display With One Display Device Disabled
X = Unsupported/Not Applicable
Functional Description
280 Datasheet
5.27.6 Intel® Flexible Display Interconnect
Intel® FDI connects the display engine in the processor with the display interfaces on
the PCH. The display data from the frame buffer is processed in the display engine of
the processor and sent to the PCH over the Intel FDI where it is transcoded as per the
display protocol and driven to the display monitor.
Intel FDI has two channels A and B. Each channel has 4 lanes and total combined is 8
lanes to transfer the data from the processor to the PCH. Depending on the data
bandwidth the interface is dynamically configured as x1, x2 or x4 lanes. Intel FDI
supports lane reversal and lane polarity reversal.
5.28 Intel® Virtualization Technology
Intel® Virtualization Technology (Intel® VT) makes a single system appear as multiple
independent systems to software. This allows for multiple, independent operating
systems to be running simultaneously on a single system. Intel® VT comprises
technology components to support virtualization of platforms based on Intel
architecture microprocessors and chipsets. The first revision of this technology (Intel®
VT-x) added hardware support in the processor to improve the virtualization
performance and robustness. The second revision of this specification (Intel® VT-d)
adds chipset hardware implementation to improve I/O performance and robustness.
The Intel® VT-d spec and other VT documents can be referenced here: http://
www.intel.com/technology/platform-technology/virtualization/index.htm
5.28.1 Intel® VT-d Objectives
The key Intel® VT-d objectives are domain based isolation and hardware based
virtualization. A domain can be abstractly defined as an isolated environment in a
platform to which a subset of host physical memory is allocated. Virtualization allows
for the creation of one or more partitions on a single system. This could be multiple
partitions in the same OS or there can be multiple operating system instances running
on the same system offering benefits such as system consolidation, legacy migration,
activity partitioning or security.
5.28.2 Intel® VT-d Features Supported
The following devices and functions support FLR in the PCH:
High Definition Audio (Device 27: Function 0)
SATA Host Controller 1 (Device 31: Function 2)
SATA Host Controller 2 (Device 31: Function 5)
USB2 (EHCI) Host Controller 1 (Device 29: Function 0)
USB2 (EHCI) Host Controller 2 (Device 26: Function 0)
GbE Lan Host Controller (Device 25: Function 0)
Interrupt virtualization support for IOxAPIC
Virtualization support for HPETs
Datasheet 281
Functional Description
5.28.3 Support for Function Level Reset (FLR) in Intel® 5 Series
Chipset and Intel® 3400 Series Chipset
Intel® VT-d allows system software (VMM/OS) to assign I/O devices to multiple
domains. The system software, then, requires ways to reset I/O devices or their func-
tions within, as it assigns/re-assigns I/O devices from one domain to another. The reset
capability is required to ensure the devices have undergone proper re-initialization and
are not keeping the stale state. A standard ability to reset I/O devices is also useful for
the VMM in case where a guest domain with assigned devices has become unrespon-
sive or has crashed.
PCI Express defines a form of device hot reset which can be initiated through the
Bridge Control register of the root/switch port to which the device is attached. How-
ever, the hot reset cannot be applied selectively to specific device functions. Also, no
similar standard functionality exists for resetting root-complex integrated devices.
Current reset limitations can be addressed through a function level reset (FLR) mecha-
nism that allows software to independently reset specific device functions.
5.28.4 Virtualization Support for PCH’s IOxAPIC
The VT-d architecture extension requires Interrupt Messages to go through the similar
Address Remapping as any other memory requests. This is to allow domain isolation for
interrupts such that a device assigned in one domain is not allowed to generate
interrupts to another domain.
The Address Remapping for VT-d is based on the Bus:Device:Function field associated
with the requests. Hence, it is required for the internal IOxAPIC to initiate the Interrupt
Messages using a unique Bus:Device:Function.
The PCH supports BIOS programmable unique Bus:Device:Function for the internal
IOxAPIC. The Bus:Device:Function field does not change the IOxAPIC functionality in
anyway, nor promoting IOxAPIC as a stand-alone PCI device. The field is only used by
the IOxAPIC in the following:
As the Requestor ID when initiating Interrupt Messages to the processor
As the Completer ID when responding to the reads targeting the IOxAPIC’s
Memory-Mapped I/O registers
5.28.5 Virtualization Support for High Precision Event Timer
(HPET)
The VT-d architecture extension requires Interrupt Messages to go through the similar
Address Remapping as any other memory requests. This is to allow domain isolation for
interrupts such that a device assigned in one domain is not allowed to generate
interrupts to another domain.
The Address Remapping for VT-d is based on the Bus:Device:Function field associated
with the requests. Hence, it is required for the HPET to initiate the direct FSB Interrupt
Messages using unique Bus:Device:Function.
The PCH supports BIOS programmable unique Bus:Device:Function for each of the
HPET timers. The Bus:Device:Function field does not change the HPET functionality in
anyway, nor promoting it as a stand-alone PCI device. The field is only used by the
HPET timer in the following:
As the Requestor ID when initiating direct interrupt messages to the Processor
As the Completer ID when responding to the reads targeting its Memory-Mapped
registers
The registers for the programmable Bus:Device:Function for HPET timer 7:0 reside
under the Device 31:Function 0 LPC Bridge’s configuration space.
Functional Description
282 Datasheet
5.29 Intel® 5 Series Chipset and Intel® 3400 Series
Chipset Platform Clocks
PCH-based platforms require several single-ended and differential clocks to synchronize
signal operation and data propagation system-wide between interfaces, and across
clock domains. Depending on implementation, the clocks will either be provided by a
third-party clock chip, in buffered mode, or by the PCH itself.
In buffered mode, the clock chip provides the following clocks to the PCH:
133-MHz differential, SSC capable
100-MHz differential, SSC capable
100-MHz differential isolated for SATA, SSC capable
96 MHz differential
14.318 MHz single-ended
Some clock chips may have an additional 25-Mhz single-ended output. This output
is typically provided for LAN clocking and will not be routed through the PCH.
The output signals from the PCH are:
1x 133-MHz differential source for processor and memory, reusable as a 100-MHz
PCI Express * Gen. 1.1 clock source.
1x 100-MHz differential source for DMI (PCI Express* 2.0 jitter tolerant)
2x 100-MHz differential sources for PCI Express* 2.0
8x 100-MHz differential sources for PCI Express* 1.1
5x 33.3 MHz single-ended source for PCI (1x of these is reserved as loopback
clock)
1x 120-MHz differential source for onboard DisplayPort, reusable as a processor
clock source
2x flexible single-ended outputs that can range from 14.31818 OR 48 MHz usable
for USB, legacy platform functions, etc.
5.29.1 Platform Clocking Requirements
Providing a platform-level clocking solution uses multiple system components
including:
•Intel
® 5 Series Chipset or Intel® 3400 Series Chipset
3rd party clock chip
Intel CK505 clock specification
25 MHz Crystal source
§ §
Datasheet 283
Ballout Definition
6 Ballout Definition
This chapter contains the PCH ballout information.
6.1 PCH Desktop Ballout
This section contains the PCH Desktop ballout. Figure 6-1 and Figure 6-2 show the
ballout from a top of the package quadrant view. Table 6-1 is the BGA ball list, sorted
alphabetically by signal name.
Ballout Definition
284 Datasheet
Figure 6-1. PCH Ballout (top view—left side) (Desktop)
BA AY AW AV AU AT AR AP AN AM AL AK AJ AH AG AF AE AD AC AB AA
1 Vss_NCTF TP22_NCT
F
Vcc3_3_NC
TF --- AD14 --- Vss --- V5REF --- ---
CLKOUTFL
EX1 /
GPIO65
--- VccME --- VccADAC --- --- CRT_RED --- VccAClk 1
2 Vss_NCTF Vss_NCTF --- Vcc3_3 --- AD23 --- AD13 --- AD16 AD22 --- VccME --- CRT_DDC_
CLK --- DAC_IREF Vss --- CRT_BLUE --- 2
3Vcc3_3_NC
TF Vcc3_3 Vss C/BE0# AD12 --- AD9 --- AD15 GNT3# /
GPIO55
CLKOUTFL
EX3 /
GPIO67
Vss --- VccME --- Vss Vss CRT_VSYN
C
CRT_GRE
EN --- XCLK_RCO
MP 3
4---
REQ2# /
GPIO52
PIRQH# /
GPIO5 --- --- PERR# PIRQB# REQ0# --- AD18 AD24 --- VccME VccME CRT_DDC_
DATA --- Vss CRT_HSYN
C--- CRT_IRTN Vss 4
5 PIRQD# --- REQ1# /
GPIO50 Vss Vss AD21 --- C/BE2# Vss --- --- Vss VccME --- VccME Vss --- --- Vss Vss --- 5
6 --- C/BE1# --- SERR# AD2 DEVSEL# --- PAR AD29 --- TRDY# GNT1# /
GPIO51 --- VccME --- CLKOUT_P
CI0 --- Vss ---
CLKOUTFL
EX2 /
GPIO66
--- 6
7 Vss --- AD10 AD7 --- --- --- IRDY# AD27 --- FRAME# AD28 --- PIRQF# /
GPIO3 --- REFCLK14I
N--- CLKOUT_P
CI1 --- DDPD_CT
RLCLK --- 7
8 --- AD19 --- AD5 PIRQE# /
GPIO2 PIRQA# AD11 --- STOP# --- Vss Vss --- REQ3# /
GPIO54 --- VccME --- Vss --- Vss --- 8
9GNT2# /
GPIO53 --- AD8 --- Vss AD0 AD6 AD4 --- --- AD26 Vss --- Vss --- CLKOUT_P
CI2 --- CLKOUT_P
CI3 --- DDPD_CT
RLDATA --- 9
10 --- AD3 C/BE3# AD25 --- --- --- --- --- Vss AD20 Vss --- PCIRST# --- VccME ---
CLKOUTFL
EX0 /
GPIO64
--- DDPC_CT
RLCLK --- 10
11 --- TACH 3 /
GPIO7
TACH0 /
GPIO17
TACH2 /
GPIO6 --- PIRQC# Vss AD1 AD31 AD17
CLKIN_PCI
LOOPBAC
K
GNT0# --- PME# --- Vss --- Vss --- DDPC_CT
RLDATA --- 11
12 PWM0 --- PWM2 --- Vss FWH0 /
LAD0
PWM1 PIRQG# /
GPIO4 Vss Vss LDRQ0# PLOCK# --- AD30 --- Vss --- CLKOUT_P
CI4 --- SDVO_CT
RLDATA --- 12
13 --- PWM3 --- HDA_SDIN
0
HDA_SDIN
2--- --- --- --- --- --- --- --- VccME --- VccME --- VccME --- SDVO_CT
RLCLK --- 13
14 Vss --- HDA_BCLK HDA_RST# --- Vss FWH4 /
LFRAME#
LDRQ1# /
GPIO23 Vss Vss TACH1 /
GPIO1 Vcc3_3 Vcc3_3 --- --- --- --- --- --- --- --- 14
15 --- USBRBIAS
#--- USBRBIAS HDA_SYN
C--- --- --- --- --- --- --- --- Vss --- Reserved VccME VccME --- VccME VccME 15
16 USBP13P --- V5REF_Su
s--- Vss GPIO33 GPIO13 HDA_SDO HDA_SDIN
3
FWH3 /
LAD3
FWH2 /
LAD2
FWH1 /
LAD1 Vcc3_3 Vcc3_3 --- VccME VccME VccME --- VccME VccME 16
17 --- USBP13N Vss USBP10N --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- 17
18 --- USBP8P Vss USBP10P --- Vss Vss HDA_SDIN
1Vss Vss USBP12P USBP12N VccSusHD
AVcc3_3 --- Vss VccCore VccCore --- Vss VccME 18
19 USBP8N --- USBP7P --- Vss --- --- --- --- --- --- --- --- Vss --- VccCore VccCore Vss --- Vss Vss 19
20 --- USBP5N --- USBP7N Vss USBP11P USBP11N Vss USBP9P USBP9N USBP6P USBP6N Vss VccIO --- VccCore VccCore VccCore --- Vss Vss 20
21 Vss --- USBP5P USBP4N --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- 21
22 --- USBP2P --- USBP4P Vss Vss USBP3N USBP3P Vss CLKIN_DO
T_96N
CLKIN_DO
T_96P Vss VccIO VccIO --- VccCore VccCore Vss --- Vss Vss 22
23 USBP1N --- USBP2N --- Vss --- --- --- --- --- --- --- --- VccIO --- VccCore VccCore VccCore --- Vss VccCore 23
24 --- USBP1P Vss Vss --- TP9 TP10 Vss INTRUDER
#PWROK RSMRST# RTCRST# Vss Vss --- VccCore VccCore Vss --- VccCore VccCore 24
25 --- USBP0P USBP0N VccSus3_3 --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- 25
26 VccSus3_3 --- VccSus3_3 --- VccSus3_3 VccSus3_3 VccSus3_3 VccSus3_3 VccSus3_3 VccSus3_3 VccSus3_3 VccSus3_3 Vss Vss --- Vss VccCore VccCore --- VccCore VccIO 26
27 --- VccSus3_3 --- VccSus3_3 VccSus3_3 --- --- --- --- --- --- --- --- Vss --- DcpSusByp Vcc3_3 Vcc3_3 --- Vss VccIO 27
28 Vss --- Vss Vss --- VccIO Vss SRTCRST# Vss Vss OC5# /
GPIO9
OC2# /
GPIO41 Vss --- --- --- --- --- --- --- --- 28
29 --- VccRTC --- VccSus3_3 Vss --- --- --- --- --- --- --- --- Vss --- Vss --- Vss --- Vss --- 29
30 RTCX2 --- RTCX1 --- Vss OC1# /
GPIO40 Vss OC3# /
GPIO42 Vss OC7# /
GPIO14
OC6# /
GPIO10 GPIO8 --- TP21 --- DcpSus --- Vss --- Vss --- 30
31 --- LAN_RST# INTVRMEN SML1CLK /
GPIO58 --- OC0# /
GPIO59
SML1DATA
/ GPIO75
OC4# /
GPIO43 SST SMBDATA SMBALERT
# / GPIO11
SUS_STAT
# / GPIO61 --- SUSCLK /
GPIO62 --- Vss --- Vss --- SATA2TXN --- 31
32 ---
SML1ALER
T# /
GPIO74 /
CLK_CFG_
SEL2
DRAMPWR
OK SMBCLK --- --- --- --- --- Vss GPIO57 Vss --- Vss --- Vss --- SATA5TXP --- SATA2TXP --- 32
33
SML0ALER
T# /
GPIO60 /
CLK_CFG_
SEL3
--- SML0CLK --- Vss RI# WAKE#
PCIECLKR
Q3# /
GPIO25
--- --- MEPWROK JTAG_TCK --- DcpSST --- Vss --- SATA5TXN --- Vss --- 33
34 --- GPIO72 --- PLTRST#
LAN_PHY_
PWR_CTR
L / GPIO12
SML0DATA GPIO24 --- JTAG_TDO --- JTAG_TMS Vss --- Vss --- SATA5RXP --- Vss --- Vss --- 34
35 SLP_LAN#
/ GPIO29 ---
PEG_B_CL
KRQ# /
GPIO56
SLP_S3# --- --- --- SLP_S4#
PCIECLKR
Q0# /
GPIO73
--- TRST# TP18 --- TP23 --- SATA5RXN --- SATA2RXP --- SATA1TXP --- 35
36 --- GPIO15 ---
PCIECLKR
Q6# /
GPIO45
SLP_S5# /
GPIO63 SLP_M# ---
PCIECLKR
Q7# /
GPIO46
TP19 --- JTAG_TDI PWRBTN# --- Vss --- Vss --- SATA2RXN --- SATA1TXN --- 36
37 Vss ---
PCIECLKR
Q4# /
GPIO26
--- Vss
GPIO30 /
PROC_MIS
SING
--- GPIO27 Vss --- --- Vss SATA0GP /
GPIO21 --- A20GATE Vss --- --- Vss SATA3TXN --- 37
38 --- DcpRTC
PCIECLKR
Q5# /
GPIO44
--- Vss SYS_PWR
OK
SATA3GP /
GPIO37
PCIECLKR
Q2# /
GPIO20
--- SLOAD /
GPIO38
SYS_RESE
T# --- SPKR SATA1GP /
GPIO19
SDATAOU
T1 /
GPIO48
--- SATA4TXP SATA4TXN --- SATA3TXP Vss 38
39 VccRTC_N
CTF --- VccSus3_3
PEG_A_CL
KRQ# /
GPIO47
TP20 --- INIT3_3V# --- SATALED#
PCIECLKR
Q1# /
GPIO18
SDATAOUT
0 / GPIO39
SATA2GP /
GPIO36 ---
SATA4GP /
GPIO16 /
CLK_CFG_
SEL1
--- Vss Vss Vss SATA3RXP --- Vss 39
40 VccSus3_3
_NCTF
VccSus3_3
_NCTF VccSus3_3 GPIO28 --- STP_PCI# /
GPIO34 --- GPIO31 --- RCIN# SERIRQ --- GPIO32 ---
SATA5GP /
GPIO49 /
TEMP_ALE
RT#
--- SATA4RXP Vss --- Vss --- 40
41 TP22_NCT
FVss_NCTF Vss_NCTF --- Vss --- GPIO35 --- SCLOCK /
GPIO22 --- --- GPIO0 --- Vss --- SATA4RXN --- --- SATA3RXN --- Vss 41
BA AY AW AV AU AT AR AP AN AM AL AK AJ AH AG AF AE AD AC AB AA
Datasheet 285
Ballout Definition
Figure 6-2. PCH Ballout (top view—right side) (Desktop)
YWVUTRPNMLK J HGFEDCBA
1--- CLKOUT_P
CIE0P --- --- VccADPLLB --- Vss --- DDPB_AUX
P--- --- DDPB_HPD --- Vss --- Vss_NCTF --- Vss_NCTF --- --- 1
2XTAL25_O
UT --- CLKOUT_P
CIE0N Vss --- VccADPLLA --- SDVO_STA
LLP --- DDPB_AUX
N Vss --- DDPD_HPD --- DDPC_1P --- DDPC_3N VccVRM Vss_NCTF --- 2
3--- Vss Vss Vss Vss --- SDVO_STA
LLN --- SDVO_INT
PVss Vss DDPC_HPD --- DDPC_1N --- DDPC_0P DDPC_3P VccVRM --- TP22_NCTF 3
4XTAL25_IN --- CLKOUT_P
CIE6P
CLKOUT_P
CIE6N --- Vss Vss SDVO_INT
N--- DDPD_AUX
N
DDPD_AUX
P--- DDPB_3N DDPB_3P DDPC_0N Vss --- DDPC_2N DDPC_2P --- 4
5Vss Vss --- --- Vss Vss --- Vss Vss --- --- Vss Vss --- Vss Vss --- DDPD_0P --- Vss_NCTF 5
6CLKOUT_P
EG_A_N --- Vss --- CLKOUT_P
CIE7P --- CLKOUT_P
CIE4P --- CLKOUT_P
CIE2N
SDVO_TVC
LKINP --- Vss DDPB_2P --- DDPB_2N Vss DDPD_1P --- DDPD_0N --- 6
7CLKOUT_P
EG_A_P --- CLKOUT_P
EG_B_N --- CLKOUT_P
CIE7N --- CLKOUT_P
CIE4N --- CLKOUT_P
CIE2P
SDVO_TVC
LKINN --- Vss Vss --- --- --- DDPD_1N PERn8 --- Vss 7
8CLKOUT_P
CIE5N --- CLKOUT_P
EG_B_P --- Vss --- Vss --- Vss Vss --- DDPB_0N --- DDPD_2N DDPD_2P Vss PERn6 --- PERp8 --- 8
9CLKOUT_P
CIE5P --- Vss --- CLKOUT_P
CIE1P --- TP13 --- CLKOUT_P
CIE3N
DDPC_AUX
P--- --- Vss DDPD_3N DDPD_3P Vss --- PERp6 --- Vcc3_3 9
10 Vss --- Reserved --- CLKOUT_P
CIE1N --- TP12 --- CLKOUT_P
CIE3P
DDPC_AUX
N DDPB_0P --- --- --- --- --- PETp7 Vss Vss --- 10
11 Reserved --- Reserved --- Vss --- Vss --- Vss Vss DDPB_1P DDPB_1N PETp6 PETn6 Vss --- PETn7 Vss PERp7 --- 11
12 Reserved --- Vss --- TP7 --- TP4 --- Vss Vss PETn8 PETp8 PETn5 PETp5 Vss Vss --- PERn5 --- PERn7 12
13 Vss --- Vss --- TP6 --- TP5 --- --- --- --- --- --- --- --- Vss PERp4 --- PERp5 --- 13
14 --- --- --- --- --- --- --- Vss Vss PETp4 PETn4 Vss PETn3 PETp3 Vss --- PERn4 PERp3 --- Vss 14
15 VccME --- VccIO VccIO VccIO --- VccIO --- --- --- --- --- --- --- --- Vss PERn1 --- PERn3 --- 15
16 VccME --- Vss Vss Vss --- VccIO VccIO VccIO Vss Vss Vss PETn2 PETp2 Vss Vss --- PERp1 --- PERp2 16
17 --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- PETp1 Vss PERn2 --- 17
18 VccME --- Vss Vss Vss --- VccIO VccIO VccIO TP1 TP2 Vss DMI3RXP DMI3RXN Vss --- PETn1 Vss DMI0RXP --- 18
19 VccME --- Vss VccIO VccIO --- VccIO --- --- --- --- --- --- --- --- Vss --- DMI1RXP --- DMI0RXN 19
20 VccLAN --- TP11 VccCore VccCore --- Vss VccIO VccIO Vss Vss TP3 CLKIN_DMI
_N
CLKIN_DMI
_P Vss DMI2RXN DMI2RXP --- DMI1RXN --- 20
21 --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- DMI_IRCO
MP
DMI_ZCOM
P--- VccAPLLEX
P21
22 VccLAN --- Vss VccCore VccCore --- Vss VccIO VccIO Vss Vss DMI0TXN DMI0TXP DMI1TXN DMI1TXP Vss Vss --- Vss --- 22
23 VccCore --- VccCore VccCore VccCore --- Vss --- --- --- --- --- --- --- --- Vss --- Vss --- VccDMI 23
24 VccCore --- VccCore Vss VccCore --- VccIO VccIO VccIO DMI3TXN DMI3TXP Vss DMI2TXN DMI2TXP Vss --- VccIO VccIO VccIO --- 24
25 --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- VccIO VccIO VccIO --- 25
26 VccIO --- VccCore VccCore VccCore --- VccCore VccIO VccIO VccIO VccIO VccIO VccIO VccIO VccIO VccCore --- VccCore --- VccCore 26
27 Vss --- Vss Vss VccCore --- VccCore --- --- --- --- --- --- --- --- VccCore VccCore --- VccCore --- 27
28 --- --- --- --- --- --- --- VccCore VccCore VccCore VccCore VccCore VccCore VccCore VccCore --- VccCore VccCore --- VccCore 28
29 VccIO --- VccIO --- VccIO --- VccCore --- --- --- --- --- --- --- --- VccCore VccCore --- VccCore --- 29
30 Vss --- SPI_MISO --- VccIO --- VccPNAND --- Reserved Vss FDI_RXN0 FDI_RXP0 FDI_RXN1 FDI_RXP1 Vss Vss --- FDI_RXN5 --- Vss 30
31 CLKIN_BCL
K_P --- SPI_CLK --- Reserved --- Vss --- Reserved Vss FDI_RXN4 FDI_RXP4 Vss FDI_RXP3 FDI_RXN3 --- FDI_RXN2 Vss FDI_RXP5 --- 31
32 CLKIN_BCL
K_N --- SPI_CS0# --- SPI_CS1# --- Reserved --- Reserved Vss Vss --- --- --- --- --- FDI_RXP2 Vss FDI_RXP6 --- 32
33 Vss --- Vss --- Reserved --- Reserved --- Vss Reserved --- --- Reserved Reserved Reserved Vss --- FDI_RXN7 --- FDI_RXN6 33
34
CLKIN_SAT
A_N /
CKSSCD_N
--- TP8 --- SPI_MOSI --- Vss --- Reserved Vss --- NV_ALE --- Vss Vss FDI_FSYNC
0Vss --- FDI_RXP7 --- 34
35
CLKIN_SAT
A_P /
CKSSCD_P
--- Vss --- Vss --- Reserved --- Reserved NV_CLE --- Reserved Reserved --- --- --- FDI_LSYNC
1
FDI_LSYNC
0--- Vss 35
36 VccIO --- VccIO --- VccIO --- Reserved --- Reserved Reserved --- Reserved Reserved --- Reserved FDI_FSYNC
1PECI --- FDI_INT --- 36
37 SATA1RXP Vss --- --- VccIO VccIO --- Vss Vss --- --- Vss
CLKOUT_D
P_N /
CLKOUT_B
CLK1_N
--- Reserved Vss Vss PMSYNCH --- VccFDIPLL 37
38 SATA1RXN --- SATA0TXP SATA0TXN --- VccIO VccIO VccME3_3 ---
CLKOUT_B
CLK0_N /
CLKOUT_P
CIE8N
CLKOUT_B
CLK0_P /
CLKOUT_P
CIE8P
---
CLKOUT_D
P_P /
CLKOUT_B
CLK1_P
Vss Reserved --- --- THRMTRIP
#
PROCPWR
GD --- 38
39 --- Vss Vss Vss SATAICOM
PI --- VccIO --- VccPNAND VccVRM Vss Vss --- Vss --- Reserved Vss Vss V_CPU_IO V_CPU_IO_
NCTF 39
40 Vss --- SATA0RXP Vcc3_3 --- VccIO --- VccME3_3 --- VccVRM Vss --- CLKOUT_D
MI_N --- Reserved --- Reserved --- Vss_NCTF Vss_NCTF 40
41 --- SATA0RXN --- --- SATAICOM
PO --- VccSATAPL
L--- VccPNAND --- --- CLKOUT_D
MI_P --- Vss --- Reserved --- Vss_NCTF Vss_NCTF TP22_NCTF 41
YWV U T R PN ML K J H G F E DC B A
286 Datasheet
Ballout Definition
Table 6-1. PCH Ballout by Signal name (Desktop Only)
PCH Desktop
Ball Name Ball #
A20GATE AG37
AD0 AT9
AD1 AP11
AD2 AU6
AD3 AY10
AD4 AP9
AD5 AV8
AD6 AR9
AD7 AV7
AD8 AW9
AD9 AR3
AD10 AW7
AD11 AR8
AD12 AU3
AD13 AP2
AD14 AU1
AD15 AN3
AD16 AM2
AD17 AM11
AD18 AM4
AD19 AY8
AD20 AL10
AD21 AT5
AD22 AL2
AD23 AT2
AD24 AL4
AD25 AV10
AD26 AL9
AD27 AN7
AD28 AK7
AD29 AN6
AD30 AH12
AD31 AN11
C/BE0# AV3
C/BE1# AY6
C/BE2# AP5
C/BE3# AW10
CLKIN_BCLK_N Y32
CLKIN_BCLK_P Y31
CLKIN_DMI_N H20
CLKIN_DMI_P G20
CLKIN_DOT_96N AM22
CLKIN_DOT_96P AL22
CLKIN_PCILOOPBA
CK AL11
CLKIN_SATA_N /
CKSSCD_N Y34
CLKIN_SATA_P /
CKSSCD_P Y35
CLKOUT_BCLK0_N
/ CLKOUT_PCIE8N L38
CLKOUT_BCLK0_P
/ CLKOUT_PCIE8P K38
CLKOUT_DMI_N H40
CLKOUT_DMI_P J41
CLKOUT_DP_N /
CLKOUT_BCLK1_N H37
CLKOUT_DP_P /
CLKOUT_BCLK1_P H38
CLKOUT_PCI0 AF6
CLKOUT_PCI1 AD7
CLKOUT_PCI2 AF9
CLKOUT_PCI3 AD9
CLKOUT_PCI4 AD12
CLKOUT_PCIE0N V2
CLKOUT_PCIE0P W1
CLKOUT_PCIE1N T10
CLKOUT_PCIE1P T9
CLKOUT_PCIE2N M6
CLKOUT_PCIE2P M7
CLKOUT_PCIE3N M9
CLKOUT_PCIE3P M10
CLKOUT_PCIE4N P7
CLKOUT_PCIE4P P6
CLKOUT_PCIE5N Y8
CLKOUT_PCIE5P Y9
CLKOUT_PCIE6N U4
CLKOUT_PCIE6P V4
CLKOUT_PCIE7N T7
CLKOUT_PCIE7P T6
CLKOUT_PEG_A_N Y6
CLKOUT_PEG_A_P Y7
CLKOUT_PEG_B_N V7
CLKOUT_PEG_B_P V8
CLKOUTFLEX0 /
GPIO64 AD10
CLKOUTFLEX1 /
GPIO65 AK1
PCH Desktop
Ball Name Ball #
CLKOUTFLEX2 /
GPIO66 AB6
CLKOUTFLEX3 /
GPIO67 AL3
CRT_BLUE AB2
CRT_DDC_CLK AG2
CRT_DDC_DATA AG4
CRT_GREEN AC3
CRT_HSYNC AD4
CRT_IRTN AB4
CRT_RED AC1
CRT_VSYNC AD3
DAC_IREF AE2
DcpRTC AY38
DcpSST AH33
DcpSus AF30
DcpSusByp AF27
DDPB_0N J8
DDPB_0P K10
DDPB_1N J11
DDPB_1P K11
DDPB_2N F6
DDPB_2P H6
DDPB_3N H4
DDPB_3P G4
DDPB_AUXN L2
DDPB_AUXP M1
DDPB_HPD J1
DDPC_0N F4
DDPC_0P E3
DDPC_1N G3
DDPC_1P F2
DDPC_2N C4
DDPC_2P B4
DDPC_3N D2
DDPC_3P D3
DDPC_AUXN L10
DDPC_AUXP L9
DDPC_CTRLCLK AB10
DDPC_CTRLDATA AB11
DDPC_HPD J3
DDPD_0N B6
DDPD_0P C5
DDPD_1N D7
PCH Desktop
Ball Name Ball #
Datasheet 287
Ballout Definition
DDPD_1P D6
DDPD_2N G8
DDPD_2P F8
DDPD_3N G9
DDPD_3P F9
DDPD_AUXN L4
DDPD_AUXP K4
DDPD_CTRLCLK AB7
DDPD_CTRLDATA AB9
DDPD_HPD H2
DEVSEL# AT6
DMI_IRCOMP D21
DMI_ZCOMP C21
DMI0RXN A19
DMI0RXP B18
DMI0TXN J22
DMI0TXP H22
DMI1RXN B20
DMI1RXP C19
DMI1TXN G22
DMI1TXP F22
DMI2RXN E20
DMI2RXP D20
DMI2TXN H24
DMI2TXP G24
DMI3RXN G18
DMI3RXP H18
DMI3TXN L24
DMI3TXP K24
DRAMPWROK AW32
FDI_FSYNC0 E34
FDI_FSYNC1 E36
FDI_INT B36
FDI_LSYNC0 C35
FDI_LSYNC1 D35
FDI_RXN0 K30
FDI_RXN1 H30
FDI_RXN2 D31
FDI_RXN3 F31
FDI_RXN4 K31
FDI_RXN5 C30
FDI_RXN6 A33
FDI_RXN7 C33
FDI_RXP0 J30
PCH Desktop
Ball Name Ball #
FDI_RXP1 G30
FDI_RXP2 D32
FDI_RXP3 G31
FDI_RXP4 J31
FDI_RXP5 B31
FDI_RXP6 B32
FDI_RXP7 B34
FRAME# AL7
FWH0 / LAD0 AT12
FWH1 / LAD1 AK16
FWH2 / LAD2 AL16
FWH3 / LAD3 AM16
FWH4 / LFRAME# AR14
GNT0# AK11
GNT1# / GPIO51 AK6
GNT2# / GPIO53 BA9
GNT3# / GPIO55 AM3
GPIO0 AK41
GPIO8 AK30
GPIO13 AR16
GPIO15 AY36
GPIO24 AR34
GPIO27 AP37
GPIO28 AV40
GPIO31 AP40
GPIO32 AJ40
GPIO33 AT16
GPIO35 AR41
GPIO57 AL32
GPIO72 AY34
HDA_BCLK AW14
HDA_RST# AV14
HDA_SDIN0 AV13
HDA_SDIN1 AP18
HDA_SDIN2 AU13
HDA_SDIN3 AN16
HDA_SDO AP16
HDA_SYNC AU15
INIT3_3V# AR39
INTRUDER# AN24
INTVRMEN AW31
IRDY# AP7
JTAG_TCK AK33
JTAG_TDI AL36
PCH Desktop
Ball Name Ball #
JTAG_TDO AN34
JTAG_TMS AL34
LAN_PHY_PWR_CT
RL / GPIO12 AU34
LAN_RST# AY31
LDRQ0# AL12
LDRQ1# / GPIO23 AP14
MEPWROK AL33
NV_ALE J34
NV_CLE L35
OC0# / GPIO59 AT31
OC1# / GPIO40 AT30
OC2# / GPIO41 AK28
OC3# / GPIO42 AP30
OC4# / GPIO43 AP31
OC5# / GPIO9 AL28
OC6# / GPIO10 AL30
OC7# / GPIO14 AM30
PAR AP6
PCIECLKRQ0# /
GPIO73 AN35
PCIECLKRQ1# /
GPIO18 AM39
PCIECLKRQ2# /
GPIO20 AP38
PCIECLKRQ3# /
GPIO25 AP33
PCIECLKRQ4# /
GPIO26 AW37
PCIECLKRQ5# /
GPIO44 AW38
PCIECLKRQ6# /
GPIO45 AV36
PCIECLKRQ7# /
GPIO46 AP36
PCIRST# AH10
PECI D36
PEG_A_CLKRQ# /
GPIO47 AV39
PEG_B_CLKRQ# /
GPIO56 AW35
PERn1 D15
PERn2 B17
PERn3 B15
PERn4 D14
PERn5 C12
PCH Desktop
Ball Name Ball #
288 Datasheet
Ballout Definition
PERn6 D8
PERn7 A12
PERn8 C7
PERp1 C16
PERp2 A16
PERp3 C14
PERp4 D13
PERp5 B13
PERp6 C9
PERp7 B11
PERp8 B8
PERR# AT4
PETn1 D18
PETn2 H16
PETn3 H14
PETn4 K14
PETn5 H12
PETn6 G11
PETn7 D11
PETn8 K12
PETp1 D17
PETp2 G16
PETp3 G14
PETp4 L14
PETp5 G12
PETp6 H11
PETp7 D10
PETp8 J12
PIRQA# AT8
PIRQB# AR4
PIRQC# AT11
PIRQD# BA5
PIRQE# / GPIO2 AU8
PIRQF# / GPIO3 AH7
PIRQG# / GPIO4 AP12
PIRQH# / GPIO5 AW4
PLOCK# AK12
PLTRST# AV34
PME# AH11
PMSYNCH C37
PROC_MISSING/
GPIO30 AT37
PROCPWRGD B38
PWM0 BA12
PCH Desktop
Ball Name Ball #
PWM1 AR12
PWM2 AW12
PWM3 AY13
PWRBTN# AK36
PWROK AM24
RCIN# AM40
REFCLK14IN AF7
REQ0# AP4
REQ1# / GPIO50 AW5
REQ2# / GPIO52 AY4
REQ3# / GPIO54 AH8
Reserved AF15
Reserved V11
Reserved Y12
Reserved V10
Reserved Y11
Reserved H36
Reserved H35
Reserved P32
Reserved E41
Reserved T33
Reserved P35
Reserved H33
Reserved F37
Reserved E39
Reserved G33
Reserved D40
Reserved F33
Reserved T31
Reserved P33
Reserved M35
Reserved L33
Reserved M36
Reserved M34
Reserved M30
Reserved F36
Reserved P36
Reserved F40
Reserved M32
Reserved L36
Reserved M31
Reserved F38
Reserved J36
Reserved J35
PCH Desktop
Ball Name Ball #
RI# AT33
RSMRST# AL24
RTCRST# AK24
RTCX1 AW30
RTCX2 BA30
SATA0GP / GPIO21 AJ37
SATA0RXN W41
SATA0RXP V40
SATA0TXN U38
SATA0TXP V38
SATA1GP / GPIO19 AH38
SATA1RXN Y38
SATA1RXP Y37
SATA1TXN AB36
SATA1TXP AB35
SATA2GP / GPIO36 AK39
SATA2RXN AD36
SATA2RXP AD35
SATA2TXN AB31
SATA2TXP AB32
SATA3GP / GPIO37 AR38
SATA3RXN AC41
SATA3RXP AC39
SATA3TXN AB37
SATA3TXP AB38
SATA4GP / GPIO16
/ CLK_CFG_SEL1 AH39
SATA4RXN AF41
SATA4RXP AE40
SATA4TXN AD38
SATA4TXP AE38
SATA5GP / GPIO49
/ TEMP_ALERT# AG40
SATA5RXN AF35
SATA5RXP AF34
SATA5TXN AD33
SATA5TXP AD32
SATAICOMPI T39
SATAICOMPO T41
SATALED# AN39
SCLOCK / GPIO22 AN41
SDATAOUT0 /
GPIO39 AL39
SDATAOUT1 /
GPIO48 AG38
PCH Desktop
Ball Name Ball #
Datasheet 289
Ballout Definition
SDVO_CTRLCLK AB13
SDVO_CTRLDATA AB12
SDVO_INTN N4
SDVO_INTP M3
SDVO_STALLN P3
SDVO_STALLP N2
SDVO_TVCLKINN L7
SDVO_TVCLKINP L6
SERIRQ AL40
SERR# AV6
SLOAD / GPIO38 AM38
SLP_LAN# /
GPIO29 BA35
SLP_M# AT36
SLP_S3# AV35
SLP_S4# AP35
SLP_S5# / GPIO63 AU36
SMBALERT# /
GPIO11 AL31
SMBCLK AV32
SMBDATA AM31
SML0ALERT# /
GPIO60 /
CLK_CFG_SEL3
BA33
SML0CLK AW33
SML0DATA AT34
SML1ALERT# /
GPIO74 /
CLK_CFG_SEL2
AY32
SML1CLK / GPIO58 AV31
SML1DATA /
GPIO75 AR31
SPI_CLK V31
SPI_CS0# V32
SPI_CS1# T32
SPI_MISO V30
SPI_MOSI T34
SPKR AJ38
SRTCRST# AP28
SST AN31
STOP# AN8
STP_PCI# /
GPIO34 AT40
SUS_STAT# /
GPIO61 AK31
SUSCLK / GPIO62 AH31
PCH Desktop
Ball Name Ball #
SYS_PWROK AT38
SYS_RESET# AL38
TACH0 / GPIO17 AW11
TACH1 / GPIO1 AL14
TACH2 / GPIO6 AV11
TACH3 / GPIO7 AY11
THRMTRIP# C38
TP1 L18
TP2 K18
TP3 J20
TP4 P12
TP5 P13
TP6 T13
TP7 T12
TP8 V34
TP9 AT24
TP10 AR24
TP11 V20
TP12 P10
TP13 P9
TP18 AK35
TP19 AN36
TP20 AU39
TP21 AH30
TP22_NCTF AY1
TP22_NCTF A3
TP22_NCTF BA41
TP22_NCTF A41
TP23 AH35
TRDY# AL6
TRST# AL35
USBP0N AW25
USBP0P AY25
USBP1N BA23
USBP1P AY24
USBP2N AW23
USBP2P AY22
USBP3N AR22
USBP3P AP22
USBP4N AV21
USBP4P AV22
USBP5N AY20
USBP5P AW21
USBP6N AK20
PCH Desktop
Ball Name Ball #
USBP6P AL20
USBP7N AV20
USBP7P AW19
USBP8N BA19
USBP8P AY18
USBP9N AM20
USBP9P AN20
USBP10N AV17
USBP10P AV18
USBP11N AR20
USBP11P AT20
USBP12N AK18
USBP12P AL18
USBP13N AY17
USBP13P BA16
USBRBIAS AV15
USBRBIAS# AY15
V_CPU_IO B39
V_CPU_IO_NCTF A39
V5REF AN1
V5REF_Sus AW16
Vcc3_3 AV2
Vcc3_3 AY3
Vcc3_3 AK14
Vcc3_3 AJ14
Vcc3_3 AJ16
Vcc3_3 AE27
Vcc3_3 AD27
Vcc3_3 U40
Vcc3_3 A9
Vcc3_3 AH16
Vcc3_3 AH18
Vcc3_3_NCTF AW1
Vcc3_3_NCTF BA3
VccAClk AA1
VccADAC AF1
VccADPLLA R2
VccADPLLB T1
VccAPLLEXP A21
VccCore AE18
VccCore AD18
VccCore AF19
VccCore AE19
VccCore AF20
PCH Desktop
Ball Name Ball #
290 Datasheet
Ballout Definition
VccCore AE20
VccCore AD20
VccCore U20
VccCore T20
VccCore AF22
VccCore AE22
VccCore U22
VccCore T22
VccCore AF23
VccCore AE23
VccCore AD23
VccCore AA23
VccCore Y23
VccCore V23
VccCore U23
VccCore T23
VccCore AF24
VccCore AE24
VccCore AB24
VccCore AA24
VccCore Y24
VccCore V24
VccCore T24
VccCore AE26
VccCore AD26
VccCore AB26
VccCore V26
VccCore U26
VccCore T26
VccCore P26
VccCore E26
VccCore C26
VccCore A26
VccCore T27
VccCore P27
VccCore E27
VccCore D27
VccCore B27
VccCore N28
VccCore M28
VccCore L28
VccCore K28
VccCore J28
VccCore H28
PCH Desktop
Ball Name Ball #
VccCore G28
VccCore F28
VccCore D28
VccCore C28
VccCore A28
VccCore P29
VccCore E29
VccCore D29
VccCore B29
VccDMI A23
VccFDIPLL A37
VccIO AH20
VccIO AJ22
VccIO AH22
VccIO AH23
VccIO U15
VccIO T15
VccIO AA27
VccIO Y29
VccIO V29
VccIO T29
VccIO T30
VccIO Y36
VccIO V36
VccIO T36
VccIO T37
VccIO R37
VccIO R38
VccIO P38
VccIO P39
VccIO R40
VccIO P24
VccIO U19
VccIO AA26
VccIO V15
VccIO Y26
VccIO AT28
VccIO N22
VccIO N24
VccIO N26
VccIO P15
VccIO P16
VccIO N16
VccIO M16
PCH Desktop
Ball Name Ball #
VccIO N18
VccIO M18
VccIO N20
VccIO M20
VccIO M22
VccIO M24
VccIO D24
VccIO C24
VccIO B24
VccIO D25
VccIO C25
VccIO B25
VccIO M26
VccIO L26
VccIO K26
VccIO J26
VccIO H26
VccIO G26
VccIO F26
VccIO P18
VccIO T19
VccIO P19
VccLAN Y20
VccLAN Y22
VccME AH1
VccME AJ2
VccME AH3
VccME AJ4
VccME AH4
VccME AJ5
VccME AG5
VccME AH6
VccME AF8
VccME AF10
VccME AH13
VccME AF13
VccME AD13
VccME AE15
VccME AD15
VccME AB16
VccME AD16
VccME AF16
VccME AE16
VccME AB15
PCH Desktop
Ball Name Ball #
Datasheet 291
Ballout Definition
VccME AA15
VccME Y15
VccME AA16
VccME Y16
VccME AA18
VccME Y18
VccME Y19
VccME3_3 N38
VccME3_3 N40
VccPNAND P30
VccPNAND M39
VccPNAND M41
VccRTC AY29
VccRTC_NCTF BA39
VccSATAPLL P41
VccSus3_3 AV25
VccSus3_3 BA26
VccSus3_3 AW26
VccSus3_3 AU26
VccSus3_3 AT26
VccSus3_3 AR26
VccSus3_3 AP26
VccSus3_3 AN26
VccSus3_3 AM26
VccSus3_3 AL26
VccSus3_3 AK26
VccSus3_3 AY27
VccSus3_3 AV27
VccSus3_3 AU27
VccSus3_3 AW39
VccSus3_3 AW40
VccSus3_3 AV29
VccSus3_3_NCTF BA40
VccSus3_3_NCTF AY40
VccSusHDA AJ18
VccVRM C2
VccVRM L39
VccVRM L40
VccVRM C3
Vss AV28
Vss U39
Vss B10
Vss AF3
Vss AH29
PCH Desktop
Ball Name Ball #
Vss AR1
Vss P1
Vss G1
Vss AD2
Vss U2
Vss K2
Vss AW3
Vss AK3
Vss AE3
Vss W3
Vss V3
Vss U3
Vss T3
Vss L3
Vss K3
Vss AE4
Vss AA4
Vss R4
Vss P4
Vss E4
Vss AV5
Vss AU5
Vss AN5
Vss AK5
Vss AF5
Vss AC5
Vss AB5
Vss Y5
Vss W5
Vss T5
Vss R5
Vss N5
Vss M5
Vss J5
Vss H5
Vss F5
Vss E5
Vss AD6
Vss V6
Vss J6
Vss E6
Vss BA7
Vss J7
Vss H7
PCH Desktop
Ball Name Ball #
Vss A7
Vss AL8
Vss AK8
Vss AD8
Vss AB8
Vss T8
Vss P8
Vss M8
Vss L8
Vss E8
Vss AU9
Vss AK9
Vss AH9
Vss V9
Vss H9
Vss E9
Vss AM10
Vss AK10
Vss Y10
Vss C10
Vss AR11
Vss AF11
Vss AD11
Vss T11
Vss P11
Vss M11
Vss L11
Vss F11
Vss C11
Vss AU12
Vss AN12
Vss AM12
Vss AF12
Vss V12
Vss M12
Vss L12
Vss F12
Vss E12
Vss Y13
Vss V13
Vss E13
Vss BA14
Vss AT14
Vss AN14
PCH Desktop
Ball Name Ball #
292 Datasheet
Ballout Definition
Vss AM14
Vss N14
Vss M14
Vss J14
Vss F14
Vss A14
Vss AH15
Vss E15
Vss AU16
Vss V16
Vss U16
Vss T16
Vss L16
Vss K16
Vss J16
Vss F16
Vss E16
Vss AW17
Vss C17
Vss AW18
Vss AT18
Vss AR18
Vss AN18
Vss AM18
Vss AF18
Vss AB18
Vss V18
Vss U18
Vss T18
Vss J18
Vss F18
Vss C18
Vss AU19
Vss AH19
Vss AD19
Vss AB19
Vss AA19
Vss V19
Vss E19
Vss AU20
Vss AP20
Vss AJ20
Vss AB20
Vss AA20
PCH Desktop
Ball Name Ball #
Vss P20
Vss L20
Vss K20
Vss F20
Vss BA21
Vss AU22
Vss AT22
Vss AN22
Vss AK22
Vss AD22
Vss AB22
Vss AA22
Vss V22
Vss L22
Vss K22
Vss E22
Vss D22
Vss AU23
Vss AB23
Vss E23
Vss AW24
Vss AV24
Vss AP24
Vss AJ24
Vss AH24
Vss AD24
Vss U24
Vss J24
Vss F24
Vss AJ26
Vss AH26
Vss AF26
Vss AH27
Vss AB27
Vss Y27
Vss V27
Vss U27
Vss BA28
Vss AW28
Vss AR28
Vss AN28
Vss AM28
Vss AJ28
Vss AU29
PCH Desktop
Ball Name Ball #
Vss AF29
Vss AD29
Vss AB29
Vss AU30
Vss AR30
Vss AN30
Vss AD30
Vss AB30
Vss Y30
Vss L30
Vss F30
Vss E30
Vss A30
Vss AF31
Vss AD31
Vss P31
Vss L31
Vss H31
Vss C31
Vss AM32
Vss AK32
Vss AH32
Vss AF32
Vss L32
Vss K32
Vss C32
Vss AU33
Vss AF33
Vss AB33
Vss Y33
Vss V33
Vss M33
Vss E33
Vss AK34
Vss AH34
Vss AD34
Vss AB34
Vss P34
Vss L34
Vss G34
Vss F34
Vss D34
Vss V35
Vss T35
PCH Desktop
Ball Name Ball #
Datasheet 293
Ballout Definition
Vss A35
Vss AH36
Vss AF36
Vss BA37
Vss AU37
Vss AN37
Vss AK37
Vss AF37
Vss AC37
Vss W37
Vss N37
Vss M37
Vss J37
Vss E37
Vss D37
Vss AU38
Vss AA38
Vss G38
Vss AF39
Vss AE39
Vss AD39
Vss AA39
Vss W39
Vss V39
Vss K39
Vss J39
Vss G39
Vss D39
Vss C39
Vss AD40
Vss AB40
Vss Y40
Vss K40
Vss AU41
Vss AH41
Vss AA41
Vss G41
Vss P23
Vss B22
Vss P22
Vss C23
Vss_NCTF BA1
Vss_NCTF E1
Vss_NCTF C1
PCH Desktop
Ball Name Ball #
Vss_NCTF BA2
Vss_NCTF AY2
Vss_NCTF B2
Vss_NCTF A5
Vss_NCTF B40
Vss_NCTF A40
Vss_NCTF AY41
Vss_NCTF AW41
Vss_NCTF C41
Vss_NCTF B41
WAKE# AR33
XCLK_RCOMP AA3
XTAL25_IN Y4
XTAL25_OUT Y2
PCH Desktop
Ball Name Ball #
Ballout Definition
294 Datasheet
6.2 PCH Ballout Mobile Ballout
This section contains the PCH ballout. Figure 6-3 and Figure 6-4 show the ballout from
a top of the package quadrant view. Table 6 - 2 is the BGA ball list, sorted alphabetically
by signal name.
Datasheet 295
Ballout Definition
Figure 6-3. PCH ballout (top View—Leff side) (Mobile Only)
53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27
BJ Vss_NC
TF
Vss_NC
TF
Vss_NC
TF
Vss_NC
TF
SDVO_
STALLN
SDVO_T
VCLKIN
N
DDPB_
AUXP
DDPB_1
N
DDPD_0
N
DDPD_1
NPETp8 PERp8 PETp5 PERp1 VccIO BJ
BH Vss_NC
TF
Vss_NC
TF Vss SDVO_IN
TP Vss DDPC_1
PVss DDPD_
2P Vss PERp5 Vss PETp1 VccIO BH
BG Vss SDVO_
STALLP
SDVO_T
VCLKIN
P
DDPB_
AUXN
DDPB_1
P
DDPD_0
P
DDPD_1
PPETn8 PERn8 PETn5 PERn1 VccIO BG
BF Vss_NC
TF Vss Vss SDVO_IN
TN
DDPC_1
N
DDPD_
2N PERn5 PETn1 BF
BE Vss_NC
TF Vss Vss Vss DDPC_
AUXN Vss DDPC_0
NVss DDPD_3
NVss PETp4 Vss VccIO BE
BD VccADP
LLB
VccADP
LLB Vss Vss DDPD_
AUXP
DDPC_
AUXP
DDPB_0
N
DDPC_0
P
DDPC_2
N
DDPD_3
PPETp6 PETn4 PETp2 VccIO BD
BC Vss DDPD_
AUXN Vss DDPB_0
PVss DDPC_2
PVss PETn6 Vss PETn2 VccIO BC
BB VccADP
LLA
VccADP
LLA Vss LVDSA_
DATA0
LVDSA_
DATA#0 Vss Vss DDPB_2
NVss DDPC_3
NVss PERp4 Vss VccIO BB
BA LVDSA_
DATA#1
LVDSA_
DATA1 Vss DDPB_2
P
DDPB_3
P
DDPC_3
PPERn6 PERn4 PERp2 VccIO BA
AY LVDSB_
DATA#0
LVDSB_
DATA0
LVDSA_
DATA2
LVDSA_
DATA#2 Vss TP5 TP4 Vss AY
AW Vss Vss DDPB_3
NVss PERp6 Vss PERn2 VccIO AW
AV LVDSA_
CLK#
LVDSA_
CLK Vss LVDSA_
DATA3
LVDSA_
DATA#3 Vss TP7 TP6 Vss DDPC_
HPD Vss PETp7 Vss PETp3 Vss VccIO AV
AU LVDSB_
DATA#2
LVDSB_
DATA2
DDPB_
HPD PETn7 PERp7 PETn3 PERn3 VccIO AU
AT LVDSB_
DATA#3
LVDSB_
DATA3
LVDSB_
DATA#1
LVDSB_
DATA1 Vss VccTX_
LVDS
VccTX_L
VDS
LVD_VR
EFH
LVD_VR
EFL Vss DDPD_
HPD Vss PERn7 Vss PERp3 VccIO AT
AR Vss AR
AP VccAClk VccAClk Vss LVDSB_
CLK#
LVDSB_
CLK Vss VccTX_L
VDS
VccTX_L
VDS Vss LVD_VB
G
LVD_IB
GAP
AN Vss Vss Vcc3_3 Vss Vss VccIO VccIO VccIO AN
AM
CLKOU
T_PCIE
4P
CLKOU
T_PCIE
4N
Vss
CLKOU
T_PCIE
2P
CLKOU
T_PCIE
2N
Vss CLKOUT
_PCIE1P
CLKOUT
_PCIE1N Vss Vss Vss Vss Vss Vss Vss Vss Vss Vss AM
AL Vss AL
AK
CLKOU
T_PEG_
B_N
CLKOU
T_PEG_
B_P
Vss
CLKOU
T_PCIE
0N
CLKOU
T_PCIE
0P
Vss Vss Vss TP13 TP12 Vss Vss Vss Vss Vss Vss Vss Vss AK
AJ
CLKOU
T_PCIE
5P
CLKOU
T_PCIE
5N
VccIO Vss Vss VccCore VccCore Vss AJ
AH XTAL25
_OUT
XTAL25
_IN Vss Vss Vss
CLKOU
T_PCIE
6P
CLKOUT
_PCIE6N Vss
CLKOU
T_PCIE
3N
CLKOU
T_PCIE
3P
VssA_L
VDS
VccALV
DS VccIO VccIO Vss VccCore VccCore VccCor
eAH
AG Vss AG
AF VssA_D
AC
VssA_D
AC Vss
CLKOU
T_PCIE
7N
CLKOU
T_PCIE
7P
Vss Vss VccME VccME VccME Vss XCLK_R
COMP Vss VccIO VccIO VccCore VccCore VccCor
eAF
AE VccADA
C
VccADA
CAE
AD CRT_RE
DVss Vss DAC_IR
EF Vss Vss
CLKOUT
_PEG_A_
P
CLKOUT
_PEG_A_
N
Vss VccME VccME VccME Vcc3_3 Vss Vss Vss Vss VccCor
eAD
AC Vss AC
AB CRT_G
REEN
CRT_IR
TN
DDPC_
CTRLDA
TA
L_DDC_
CLK Vss L_CTRL
_CLK NC_1 Vss NC_3 NC_4 Vss NC_2 Vcc3_3 Vcc3_3 Vss Vss Vss VccCor
eAB
AA CRT_BL
UE Vss VccME VccME Vss Vss Vss Vss AA
YCRT_HS
YNC
CRT_VS
YNC
DDPC_
CTRLCL
K
L_BKLT
CTL Vss Vss L_DDC_
DATA Vss VccME VccME VccME Vss VccME VccME Vss Vss Vss Vss Y
WVss W
V
CRT_D
DC_DAT
A
CRT_D
DC_CLK Vss L_CTRL
_DATA Vss Vss Vss Vss VccME VccME VccME Vss Vss Vss Vss Vss Vss VccSus
3_3 V
U
DDPD_
CTRLDA
TA
DDPD_
CTRLCL
K
Vcc3_3 Vss Vss Vss Vss VccSus
3_3 U
T
SDVO_
CTRLDA
TA
SDVO_
CTRLCL
K
Vss L_BKLT
EN
L_VDD_
EN Vss
CLKOUT
FLEX0 /
GPIO64
Vss
CLKOU
TFLEX2
/
GPIO66
Vss NC_5 T
RVss R
PCLKOU
T_PCI1
CLKOU
T_PCI3 Vss CLKOU
T_PCI4 Vss CLKOU
T_PCI2 Vss
CLKOUT
FLEX1 /
GPIO65
Vss REFCLK
14IN Vss Vcc3_3 Vss Vss Vss VccSus
3_3 P
NCLKOU
T_PCI0
CLKOU
TFLEX3
/
GPIO67
Vss Vcc3_3 AD1 TP15 TP17 VccSus
3_3 N
MREQ3# /
GPIO54 AD22 Vss AD12 AD30 Vss AD13 AD16 Vss AD15 Vss Vcc3_3 Vss TP14 TP16 VccSus
3_3 M
LVss Vss Vcc3_3 Vss AD25 Vss VccSusHD
A
VccSus
3_3 L
KPIRQF#
/ GPIO3 AD24 V5REF AD18 Vss AD21 GNT1# /
GPIO51 Vss K
JAD23 C/BE0#
CLKIN_
PCILOO
PBACK
AD27 Vcc3_3 AD17 AD5 GPIO7
HDA_DOC
K_RST# /
GPIO13
VccSus
3_3 J
HGNT3# /
GPIO55 PIRQB# Vss AD9 C/BE2# PAR Vss AD0 Vss AD31 Vss
HDA_DOC
K_EN# /
GPIO33
Vss VccSus
3_3 H
GVss AD28 Vss C/BE1# Vss PIRQA# Vss C/BE3# Vss HDA_SDI
N0
VccSus
3_3 G
FAD14 REQ0# Vss GNT0# DEVSEL
#AD29 AD26 AD19 GPIO17 GNT2# /
GPIO53
LDRQ1#
/
GPIO23
HDA_SDI
N3
HDA_SDI
N1
VccSus
3_3 F
EVss_NC
TF PERR# Vss Vss SERR# Vss AD10 Vss AD8 Vss HDA_SDI
N2 Vss VccSus
3_3 E
DVss_NC
TF Vss PLOCK# AD7 STOP# GPIO6 FWH0 /
LAD0
HDA_S
YNC D
CVss TRDY# FRAME
#AD2 AD20 AD11 GPIO1 AD4
FWH4 /
LFRAM
E#
FWH2 /
LAD2
HDA_RST
#
VccSus
3_3 C
BVss_NC
TF
Vss_NC
TF Vss REQ2# /
GPIO52 Vss PIRQE#
/ GPIO2 Vss PIRQC
#Vss FWH1 /
LAD1 Vss HDA_S
DO
VccSu
s3_3 B
AVss_NC
TF
Vss_NC
TF
Vss_NC
TF
Vss_NC
TF
PIRQH#
/ GPIO5
REQ1# /
GPIO50
PIRQD
#IRDY# AD6 AD3 PIRQG#
/ GPIO4 LDRQ0# FWH3 /
LAD3
HDA_BCL
K
VccSus
3_3 A
53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27
Ballout Definition
296 Datasheet
Figure 6-4. PCH ballout (top View—right side) (Mobile Only)
26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
BJ VccIO VccAPL
LEXP
DMI1RX
N
DMI3RX
N
VccFDIPL
L
FDI_RXN
3FDI_INT FDI_LSY
NC0
PMSYNC
HReserved Reserved Vss_NCT
FVss_NCTF Vss_NCT
FVss_NCTF BJ
BH DMI_ZC
OMP Vss DMI1TXP Vss FDI_RXN
1Vss FDI_FSYN
C1 Vss Vss Vss Vss_NCT
FVss_NCTF BH
BG VccIO Vss DMI1RX
P
DMI3RX
PVss FDI_RXP
3
FDI_LSY
NC1 Vss PECI Reserved Reserved Vss BG
BF DMI_IR
COMP DMI1TXN FDI_RXP
1
FDI_FSYN
C0 Vss Reserved Vss Vss_NCTF BF
BE VccIO Vss DMI0TX
NVss DMI3TXN Vss FDI_RXN
5Vss PROCPW
RGD Vss Vss Reserved Vss_NCTF BE
BD VccIO DMI0R
XP
DMI0TX
P
DMI2TX
NDMI3TXP FDI_RXN
2
FDI_RXP
5
FDI_RXP
7
THRMTRI
P# Reserved Reserved Vss NV_ALE Reserved BD
BC VccIO DMI0R
XN Vss DMI2TX
PVss FDI_RXP
2Vss FDI_RXN
7Vss Reserved Vss BC
BB VccIO Vss TP3 Vss FDI_RXP
0Vss FDI_RXP
6Vss Vss Reserved Reserved Vss Reserved Reserved BB
BA VccIO CLKIN_
DMI_P TP1 DMI2RX
P
FDI_RXN
0
FDI_RXN
4
FDI_RXN
6Vss Reserved SPI_CLK BA
AY Vss Reserved Reserved Vss NV_CLE Reserved SPI_CS1# SPI_MOSI AY
AW VccIO CLKIN_
DMI_N TP2 DMI2RX
NVss FDI_RXP
4Vss Vss AW
AV VccIO Vss Vss Vss Vss Vss Vss Vss Reserved Reserved Vss Reserved Reserved Vss SPI_CS0# SPI_MISO AV
AU VccIO VccVR
MVss Vss V_CPU_I
OVccDMI Vss Reserved AU
AT VccIO VccVR
MVccVRM VccVRM V_CPU_I
OVccDMI Vss Vss Vss Reserved Vss Vss Reserved Vss
CLKOUT_D
P_P /
CLKOUT_B
CLK1_P
CLKOUT_D
P_N /
CLKOUT_B
CLK1_N
AT
AR Vss AR
AP Reserved Vss Vss VccME3_
3
VccME3_
3Vss Reserved Reserved Vss CLKIN_BCL
K_N
CLKIN_BC
LK_P AP
AN VccIO VccIO VccIO VccIO VccIO Vss CLKOUT_
DMI_N
CLKOUT
_DMI_P AN
AM Vss Vss VccIO Vss Vss Vss VccPNAN
D
VccPNAN
D
VccPNAN
D
VccPNAN
DVss VccME3_
3VccME3_3 Vss Vss Vss
CLKOUT_B
CLK0_N /
CLKOUT_P
CIE8N
CLKOUT_B
CLK0_P /
CLKOUT_P
CIE8P
AM
AL Vss AL
AK Vss VccIO Vss Vss VccPNA
ND
VccPNA
ND
VccPNAN
D
VccPNAN
D
VccPNAN
DVss SATA0TX
N
SATA0TX
PVss SATA0RXN SATA0RX
PVss VccSATAPL
L
VccSATAPL
LAK
AJ Vss TP11 Vss Vss Vss Vss Vss Vss AJ
AH VccCor
eVss VccIO VccIO VccIO VccIO Vss Vss
CLKIN_SA
TA_N /
CKSSCD_
N
CLKIN_S
ATA_P /
CKSSCD
_P
Vss SATA1TX
NSATA1TXP Vss SATA1RX
N
SATA1RX
PSATA3RXN SATA3RXP AH
AG Vss AG
AF VccCor
eVccLAN VccLAN VccIO VccIO VccIO SATAICO
MPO
SATAICO
MPI TP8 Vss SATA2RX
N
SATA2RX
PVss SATA2TXN SATA2TX
PVss SATA3TXN SATA3TXP AF
AE Vss Vss AE
AD VccCor
eVss Vss VccIO VccIO VccIO Vss Vss Vcc3_3 Vss Vss SATA4RX
NSATA4RXP Vss SATA4TX
N
SATA4TX
PSATA5RXN SATA5RXP AD
AC Vss AC
AB VccCor
e
VccCor
eVss VccIO VccIO VccIO Vss Vss SATA3GP
/ GPIO37 GPIO27 Vss SERIRQ Vss SATA2GP /
GPIO36
SDATAOU
T1 /
GPIO48
Vss SATA5TXN SATA5TXP AB
AA Vss Vss TP19 Vss Vss Vss
SATA5GP /
GPIO49 /
TEMP_AL
ERT#
SATA4GP
/ GPIO16 AA
YVccIO VccIO Vss DcpSus DcpSus
Byp Vss Vcc3_3 Vss Vss Vss Vss SATA0GP
/ GPIO21 Vss SCLOCK /
GPIO22 Vss Vss BMBUSY# /
GPIO0
CLKRUN# /
GPIO32 Y
WVss W
VVccIO VccIO VccIO Vss Vss Vss Vcc3_3 Vcc3_3 GPIO28 DcpSST Vss DcpRTC Vss Vss GPIO35 Vss SLOAD /
GPIO38
SATA1GP /
GPIO19 V
UVccSus
3_3
VccSus
3_3
VccSus3
_3
VccSus3
_3
VccSus
3_3
VccSus3
_3
PCIECLKR
Q1# /
GPIO18
A20GATE U
TOC7# /
GPIO14 CL_CLK1 Vss CL_DATA
1
CL_RST1
#Vss GPIO15 SYS_RES
ET# Vss SATALED# RCIN# T
RVss R
PVccSus
3_3 Vss Vss USBP2
P
VccSus3_
3Vss
PEG_B_C
LKRQ# /
GPIO56
SLP_S3# Vss
PCIECLK
RQ0# /
GPIO73
SUS_STAT
# / GPIO61
ACPRESE
NT /
GPIO31
INIT3_3V# PWRBTN
#
SDATAOUT
0 / GPIO39 SPKR P
NVccSus
3_3 Vss USBP6P USBP2
NTP10 OC0# /
GPIO59
PCIECLKR
Q2# /
GPIO20
TP23 N
MVccSus
3_3
USBP1
2P USBP6N Vss TP9 Vss
SML1ALE
RT# /
GPIO74
Vss
STP_PCI
# /
GPIO34
PCIECLK
RQ4# /
GPIO26
Vss PME# SYS_PWR
OK Vss JTAG_TCK
SUS_PWR
_DN_ACK /
GPIO30
M
LVccSus
3_3
USBP1
2N Vss USBP3
PVss OC3# /
GPIO42 Vss Vss L
KVss
LAN_PH
Y_PWR_
CTRL /
GPIO12
SLP_M# Vss PCIRST# MEPWR
OK JTAG_TMS JTAG_TDI K
JVccSus
3_3 Vss USBP8P USBP3
NUSBP0P OC1# /
GPIO40
SML0ALE
RT# /
GPIO60
WAKE# TRST# JTAG_TD
OJ
HVccSus
3_3
USBP1
1P USBP8N Vss USBP0N Vss SMBCLK TP18 GPIO24 SLP_S4#
PCIECLK
RQ5# /
GPIO44
Vss
PCIECLKR
Q6# /
GPIO45
PEG_A_CL
KRQ# /
GPIO47
H
GVccSus
3_3
USBP1
1N Vss USBP4
PVss OC5# /
GPIO9 Vss
SML1DA
TA /
GPIO75
Vss SML0DAT
AVss G
FVccSus
3_3
V5REF
_Sus USBP9P USBP4
N
CLKIN_D
OT_96N
OC2# /
GPIO41 RI# OC6# /
GPIO10 GPIO8 GPIO57 SLP_LAN
#/GPIO29 Vss SUSCLK /
GPIO62
PCIECLKR
Q7# /
GPIO46
F
EVccSus
3_3 Vss USBP9N Vss CLKIN_D
OT_96P Vss OC4# /
GPIO43 Vss
SML1CL
K /
GPIO58
Vss Vss SLP_S5# /
GPIO63 Vss_NCTF E
DUSBRBI
AS USBP7P SRTCRS
T# RTCX2 DRAMP
WROK PLTRST# Vss_NCT
FVss_NCTF D
CVccSus
3_3
USBP1
3P
USBP10
P
USBP5
PUSBP1P RSMRST
#
RTCRST
#Vss TP24 SMBDATA SML0CLK C
BUSBRBI
AS# Vss USBP7N Vss PWROK Vss RTCX1 Vss
SMBALE
RT# /
GPIO11
Vss Vss_NCTF Vss_NCT
FB
AVccSus
3_3
USBP1
3N
USBP10
N
USBP5
NUSBP1N INTRUDE
R#
INTVRME
NVccRTC LAN_RST
#
PCIECLKR
Q3# /
GPIO25
BATLOW#
/ GPIO72
Vss_NCT
FVss_NCTF A
26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
Datasheet 297
Ballout Definition
Table 6-2. PCH Ballout by Signal name (Mobile Only)
PCH Mobile
Ball Name Ball #
A20GATE U2
ACPRESENT /
GPIO31 P7
AD0 H40
AD1 N34
AD2 C44
AD3 A38
AD4 C36
AD5 J34
AD6 A40
AD7 D45
AD8 E36
AD9 H48
AD10 E40
AD11 C40
AD12 M48
AD13 M45
AD14 F53
AD15 M40
AD16 M43
AD17 J36
AD18 K48
AD19 F40
AD20 C42
AD21 K46
AD22 M51
AD23 J52
AD24 K51
AD25 L34
AD26 F42
AD27 J40
AD28 G46
AD29 F44
AD30 M47
AD31 H36
BATLOW# / GPIO72 A6
C/BE0# J50
C/BE1# G42
C/BE2# H47
C/BE3# G34
CL_CLK1 T13
CL_DATA1 T11
CL_RST1# T9
CLKIN_BCLK_N AP3
CLKIN_BCLK_P AP1
CLKIN_DMI_N AW24
CLKIN_DMI_P BA24
CLKIN_DOT_96N F18
CLKIN_DOT_96P E18
CLKIN_PCILOOPBA
CK J42
CLKIN_SATA_N /
CKSSCD_N AH13
CLKIN_SATA_P /
CKSSCD_P AH12
CLKOUT_BCLK0_N
/ CLKOUT_PCIE8N AM3
CLKOUT_BCLK0_P /
CLKOUT_PCIE8P AM1
CLKOUT_DMI_N AN4
CLKOUT_DMI_P AN2
CLKOUT_DP_N /
CLKOUT_BCLK1_N AT1
CLKOUT_DP_P /
CLKOUT_BCLK1_P AT3
CLKOUT_PCI0 N52
CLKOUT_PCI1 P53
CLKOUT_PCI2 P46
CLKOUT_PCI3 P51
CLKOUT_PCI4 P48
CLKOUT_PCIE0N AK48
CLKOUT_PCIE0P AK47
CLKOUT_PCIE1N AM43
CLKOUT_PCIE1P AM45
CLKOUT_PCIE2N AM47
CLKOUT_PCIE2P AM48
CLKOUT_PCIE3N AH42
CLKOUT_PCIE3P AH41
CLKOUT_PCIE4N AM51
CLKOUT_PCIE4P AM53
CLKOUT_PCIE5N AJ50
CLKOUT_PCIE5P AJ52
CLKOUT_PCIE6N AH45
CLKOUT_PCIE6P AH46
CLKOUT_PCIE7N AF48
CLKOUT_PCIE7P AF47
CLKOUT_PEG_A_N AD43
CLKOUT_PEG_A_P AD45
PCH Mobile
Ball Name Ball #
CLKOUT_PEG_B_N AK53
CLKOUT_PEG_B_P AK51
CLKOUTFLEX0 /
GPIO64 T45
CLKOUTFLEX1 /
GPIO65 P43
CLKOUTFLEX2 /
GPIO66 T42
CLKOUTFLEX3 /
GPIO67 N50
CLKRUN# / GPIO32 Y1
CRT_BLUE AA52
CRT_DDC_CLK V51
CRT_DDC_DATA V53
CRT_GREEN AB53
CRT_HSYNC Y53
CRT_IRTN AB51
CRT_RED AD53
CRT_VSYNC Y51
DAC_IREF AD48
DcpRTC V9
DcpSST V12
DcpSus Y22
DcpSusByp Y20
DDPB_0N BD42
DDPB_0P BC42
DDPB_1N BJ42
DDPB_1P BG42
DDPB_2N BB40
DDPB_2P BA40
DDPB_3N AW38
DDPB_3P BA38
DDPB_AUXN BG44
DDPB_AUXP BJ44
DDPB_HPD AU38
DDPC_0N BE40
DDPC_0P BD40
DDPC_1N BF41
DDPC_1P BH41
DDPC_2N BD38
DDPC_2P BC38
DDPC_3N BB36
DDPC_3P BA36
DDPC_AUXN BE44
PCH Mobile
Ball Name Ball #
298 Datasheet
Ballout Definition
DDPC_AUXP BD44
DDPC_CTRLCLK Y49
DDPC_CTRLDATA AB49
DDPC_HPD AV40
DDPD_0N BJ40
DDPD_0P BG40
DDPD_1N BJ38
DDPD_1P BG38
DDPD_2N BF37
DDPD_2P BH37
DDPD_3N BE36
DDPD_3P BD36
DDPD_AUXN BC46
DDPD_AUXP BD46
DDPD_CTRLCLK U50
DDPD_CTRLDATA U52
DDPD_HPD AT38
DEVSEL# F46
DMI_IRCOMP BF25
DMI_ZCOMP BH25
DMI0RXN BC24
DMI0RXP BD24
DMI0TXN BE22
DMI0TXP BD22
DMI1RXN BJ22
DMI1RXP BG22
DMI1TXN BF21
DMI1TXP BH21
DMI2RXN AW20
DMI2RXP BA20
DMI2TXN BD20
DMI2TXP BC20
DMI3RXN BJ20
DMI3RXP BG20
DMI3TXN BE18
DMI3TXP BD18
DRAMPWROK D9
FDI_FSYNC0 BF13
FDI_FSYNC1 BH13
FDI_INT BJ14
FDI_LSYNC0 BJ12
FDI_LSYNC1 BG14
FDI_RXN0 BA18
FDI_RXN1 BH17
PCH Mobile
Ball Name Ball #
FDI_RXN2 BD16
FDI_RXN3 BJ16
FDI_RXN4 BA16
FDI_RXN5 BE14
FDI_RXN6 BA14
FDI_RXN7 BC12
FDI_RXP0 BB18
FDI_RXP1 BF17
FDI_RXP2 BC16
FDI_RXP3 BG16
FDI_RXP4 AW16
FDI_RXP5 BD14
FDI_RXP6 BB14
FDI_RXP7 BD12
FRAME# C46
FWH0 / LAD0 D33
FWH1 / LAD1 B33
FWH2 / LAD2 C32
FWH3 / LAD3 A32
FWH4 / LFRAME# C34
GNT0# F48
GNT1# / GPIO51 K45
GNT2# / GPIO53 F36
GNT3# / GPIO55 H53
GPIO0 Y3
GPIO1 C38
GPIO6 D37
GPIO7 J32
GPIO8 F10
GPIO15 T7
GPIO17 F38
GPIO24 H10
GPIO27 AB12
GPIO28 V13
GPIO35 V6
GPIO57 F8
HDA_BCLK A30
HDA_DOCK_EN# /
GPIO33 H32
HDA_DOCK_RST# /
GPIO13 J30
HDA_RST# C30
HDA_SDIN0 G30
HDA_SDIN1 F30
HDA_SDIN2 E32
PCH Mobile
Ball Name Ball #
HDA_SDIN3 F32
HDA_SDO B29
HDA_SYNC D29
INIT3_3V# P6
INTRUDER# A16
INTVRMEN A14
IRDY# A42
JTAG_TCK M3
JTAG_TDI K1
JTAG_TDO J2
JTAG_TMS K3
L_BKLTCTL Y48
L_BKLTEN T48
L_CTRL_CLK AB46
L_CTRL_DATA V48
L_DDC_CLK AB48
L_DDC_DATA Y45
L_VDD_EN T47
LAN_PHY_PWR_CT
RL / GPIO12 K9
LAN_RST# A10
LDRQ0# A34
LDRQ1# / GPIO23 F34
LVD_IBG AP39
LVD_VBG AP41
LVD_VREFH AT43
LVD_VREFL AT42
LVDSA_CLK# AV53
LVDSA_CLK AV51
LVDSA_DATA#0 BB47
LVDSA_DATA#1 BA52
LVDSA_DATA#2 AY48
LVDSA_DATA#3 AV47
LVDSA_DATA0 BB48
LVDSA_DATA1 BA50
LVDSA_DATA2 AY49
LVDSA_DATA3 AV48
LVDSB_CLK# AP48
LVDSB_CLK AP47
LVDSB_DATA#0 AY53
LVDSB_DATA#1 AT49
LVDSB_DATA#2 AU52
LVDSB_DATA#3 AT53
LVDSB_DATA0 AY51
PCH Mobile
Ball Name Ball #
Datasheet 299
Ballout Definition
LVDSB_DATA1 AT48
LVDSB_DATA2 AU50
LVDSB_DATA3 AT51
MEPWROK K5
NC_1 AB45
NC_2 AB38
NC_3 AB42
NC_4 AB41
NC_5 T39
NV_ALE BD3
NV_CLE AY6
OC0# / GPIO59 N16
OC1# / GPIO40 J16
OC2# / GPIO41 F16
OC3# / GPIO42 L16
OC4# / GPIO43 E14
OC5# / GPIO9 G16
OC6# / GPIO10 F12
OC7# / GPIO14 T15
PAR H44
PCIECLKRQ0# /
GPIO73 P9
PCIECLKRQ1# /
GPIO18 U4
PCIECLKRQ2# /
GPIO20 N4
PCIECLKRQ3# /
GPIO25 A8
PCIECLKRQ4# /
GPIO26 M9
PCIECLKRQ5# /
GPIO44 H6
PCIECLKRQ6# /
GPIO45 H3
PCIECLKRQ7# /
GPIO46 F1
PCIRST# K6
PECI BG10
PEG_A_CLKRQ# /
GPIO47 H1
PEG_B_CLKRQ# /
GPIO56 P13
PERn1 BG30
PERn2 AW30
PERn3 AU30
PERn4 BA32
PCH Mobile
Ball Name Ball #
PERn5 BF33
PERn6 BA34
PERn7 AT34
PERn8 BG34
PERp1 BJ30
PERp2 BA30
PERp3 AT30
PERp4 BB32
PERp5 BH33
PERp6 AW34
PERp7 AU34
PERp8 BJ34
PERR# E50
PETn1 BF29
PETn2 BC30
PETn3 AU32
PETn4 BD32
PETn5 BG32
PETn6 BC34
PETn7 AU36
PETn8 BG36
PETp1 BH29
PETp2 BD30
PETp3 AV32
PETp4 BE32
PETp5 BJ32
PETp6 BD34
PETp7 AV36
PETp8 BJ36
PIRQA# G38
PIRQB# H51
PIRQC# B37
PIRQD# A44
PIRQE# / GPIO2 B41
PIRQF# / GPIO3 K53
PIRQG# / GPIO4 A36
PIRQH# / GPIO5 A48
PLOCK# D49
PLTRST# D5
PME# M7
PMSYNCH BJ10
PROCPWRGD BE10
PWRBTN# P5
PWROK B17
PCH Mobile
Ball Name Ball #
RCIN# T1
REFCLK14IN P41
REQ0# F51
REQ1# / GPIO50 A46
REQ2# / GPIO52 B45
REQ3# / GPIO54 M53
Reserved AY9
Reserved BD1
Reserved AP15
Reserved BD8
Reserved AV9
Reserved BG8
Reserved AP7
Reserved AP6
Reserved BD6
Reserved BB7
Reserved BC8
Reserved BJ8
Reserved BJ6
Reserved BG6
Reserved AT6
Reserved AT9
Reserved BB1
Reserved AV6
Reserved BB3
Reserved BA4
Reserved BE4
Reserved BB6
Reserved AV7
Reserved AU2
Reserved AY8
Reserved AY5
Reserved AV11
Reserved BF5
RI# F14
RSMRST# C16
RTCRST# C14
RTCX1 B13
RTCX2 D13
SATA0GP / GPIO21 Y9
SATA0RXN AK7
SATA0RXP AK6
SATA0TXN AK11
SATA0TXP AK9
PCH Mobile
Ball Name Ball #
300 Datasheet
Ballout Definition
SATA1GP / GPIO19 V1
SATA1RXN AH6
SATA1RXP AH5
SATA1TXN AH9
SATA1TXP AH8
SATA2GP / GPIO36 AB7
SATA2RXN AF11
SATA2RXP AF9
SATA2TXN AF7
SATA2TXP AF6
SATA3GP / GPIO37 AB13
SATA3RXN AH3
SATA3RXP AH1
SATA3TXN AF3
SATA3TXP AF1
SATA4GP / GPIO16 AA2
SATA4RXN AD9
SATA4RXP AD8
SATA4TXN AD6
SATA4TXP AD5
SATA5GP / GPIO49/
TEMP_ALERT# AA4
SATA5RXN AD3
SATA5RXP AD1
SATA5TXN AB3
SATA5TXP AB1
SATAICOMPI AF15
SATAICOMPO AF16
SATALED# T3
SCLOCK / GPIO22 Y7
SDATAOUT0 /
GPIO39 P3
SDATAOUT1 /
GPIO48 AB6
SDVO_CTRLCLK T51
SDVO_CTRLDATA T53
SDVO_INTN BF45
SDVO_INTP BH45
SDVO_STALLN BJ48
SDVO_STALLP BG48
SDVO_TVCLKINN BJ46
SDVO_TVCLKINP BG46
SERIRQ AB9
SERR# E44
SLOAD / GPIO38 V3
PCH Mobile
Ball Name Ball #
SLP_LAN# /
GPIO29 F6
SLP_M# K8
SLP_S3# P12
SLP_S4# H7
SLP_S5# / GPIO63 E4
SMBALERT# /
GPIO11 B9
SMBCLK H14
SMBDATA C8
SML0ALERT# /
GPIO60 J14
SML0CLK C6
SML0DATA G8
SML1ALERT# /
GPIO74 M14
SML1CLK / GPIO58 E10
SML1DATA /
GPIO75 G12
SPI_CLK BA2
SPI_CS0# AV3
SPI_CS1# AY3
SPI_MISO AV1
SPI_MOSI AY1
SPKR P1
SRTCRST# D17
STOP# D41
STP_PCI# / GPIO34 M11
SUS_PWR_DN_ACK
/ GPIO30 M1
SUS_STAT# /
GPIO61 P8
SUSCLK / GPIO62 F3
SYS_PWROK M6
SYS_RESET# T6
THRMTRIP# BD10
TP1 BA22
TP2 AW22
TP3 BB22
TP4 AY45
TP5 AY46
TP6 AV43
TP7 AV45
TP8 AF13
TP9 M18
TP10 N18
PCH Mobile
Ball Name Ball #
TP11 AJ24
TP12 AK41
TP13 AK42
TP14 M32
TP15 N32
TP16 M30
TP17 N30
TP18 H12
TP19 AA23
TP23 N2
TP24 C10
TRDY# C48
TRST# J4
USBP0N H18
USBP0P J18
USBP1N A18
USBP1P C18
USBP2N N20
USBP2P P20
USBP3N J20
USBP3P L20
USBP4N F20
USBP4P G20
USBP5N A20
USBP5P C20
USBP6N M22
USBP6P N22
USBP7N B21
USBP7P D21
USBP8N H22
USBP8P J22
USBP9N E22
USBP9P F22
USBP10N A22
USBP10P C22
USBP11N G24
USBP11P H24
USBP12N L24
USBP12P M24
USBP13N A24
USBP13P C24
USBRBIAS D25
USBRBIAS# B25
V_CPU_IO AT18
PCH Mobile
Ball Name Ball #
301 Datasheet
Ballout Definition
V_CPU_IO AU18
V5REF K49
V5REF_Sus F24
Vcc3_3 AB34
Vcc3_3 AB35
Vcc3_3 AD35
Vcc3_3 AN35
Vcc3_3 AD13
Vcc3_3 V15
Vcc3_3 V16
Vcc3_3 Y16
Vcc3_3 J38
Vcc3_3 L38
Vcc3_3 M36
Vcc3_3 N36
Vcc3_3 P36
Vcc3_3 U35
VccAClk AP51
VccAClk AP53
VccADAC AE50
VccADAC AE52
VccADPLLA BB51
VccADPLLA BB53
VccADPLLB BD51
VccADPLLB BD53
VccALVDS AH38
VccAPLLEXP BJ24
VccCore AB24
VccCore AB26
VccCore AB28
VccCore AD26
VccCore AD28
VccCore AF26
VccCore AF28
VccCore AF30
VccCore AF31
VccCore AH26
VccCore AH28
VccCore AH30
VccCore AH31
VccCore AJ30
VccCore AJ31
VccDMI AT16
VccDMI AU16
PCH Mobile
Ball Name Ball #
VccFDIPLL BJ18
VccIO AN30
VccIO AN31
VccIO AN23
VccIO AN24
VccIO AN26
VccIO AN28
VccIO AT26
VccIO AT28
VccIO AU26
VccIO AU28
VccIO AV26
VccIO AV28
VccIO AW26
VccIO AW28
VccIO BA26
VccIO BA28
VccIO BB26
VccIO BB28
VccIO BC26
VccIO BC28
VccIO BD26
VccIO BD28
VccIO BE26
VccIO BE28
VccIO BG26
VccIO BG28
VccIO BH27
VccIO BJ26
VccIO BJ28
VccIO AN20
VccIO AN22
VccIO V23
VccIO AH23
VccIO AH35
VccIO AJ35
VccIO AH22
VccIO AK24
VccIO AM23
VccIO AB19
VccIO AB20
VccIO AB22
VccIO AD19
VccIO AD20
PCH Mobile
Ball Name Ball #
VccIO AD22
VccIO AF19
VccIO AF20
VccIO AF22
VccIO AH20
VccIO AH19
VccIO AF32
VccIO AF34
VccIO AH34
VccIO V24
VccIO V26
VccIO Y24
VccIO Y26
VccLAN AF23
VccLAN AF24
VccME AD38
VccME AD39
VccME AD41
VccME AF41
VccME AF42
VccME AF43
VccME AA34
VccME Y34
VccME Y35
VccME AA35
VccME V39
VccME V41
VccME V42
VccME Y39
VccME Y41
VccME Y42
VccME3_3 AM8
VccME3_3 AM9
VccME3_3 AP11
VccME3_3 AP9
VccPNAND AK13
VccPNAND AK15
VccPNAND AK16
VccPNAND AK19
VccPNAND AK20
VccPNAND AM12
VccPNAND AM13
VccPNAND AM15
VccPNAND AM16
PCH Mobile
Ball Name Ball #
Datasheet 302
Ballout Definition
VccRTC A12
VccSATAPLL AK1
VccSATAPLL AK3
VccSus3_3 U23
VccSus3_3 P18
VccSus3_3 U19
VccSus3_3 U20
VccSus3_3 U22
VccSus3_3 A26
VccSus3_3 A28
VccSus3_3 B27
VccSus3_3 C26
VccSus3_3 C28
VccSus3_3 E26
VccSus3_3 E28
VccSus3_3 F26
VccSus3_3 F28
VccSus3_3 G26
VccSus3_3 G28
VccSus3_3 H26
VccSus3_3 H28
VccSus3_3 J26
VccSus3_3 J28
VccSus3_3 L26
VccSus3_3 L28
VccSus3_3 M26
VccSus3_3 M28
VccSus3_3 N26
VccSus3_3 N28
VccSus3_3 P26
VccSus3_3 P28
VccSus3_3 U24
VccSus3_3 U26
VccSus3_3 U28
VccSus3_3 V28
VccSusHDA L30
VccTX_LVDS AP43
VccTX_LVDS AP45
VccTX_LVDS AT45
VccTX_LVDS AT46
VccVRM AT24
VccVRM AT22
VccVRM AT20
VccVRM AU24
PCH Mobile
Ball Name Ball #
Vss AU22
Vss AV18
Vss AA19
Vss AA20
Vss AA22
Vss AA24
Vss AA26
Vss AA28
Vss AA30
Vss AA31
Vss AA32
Vss AA50
Vss AB11
Vss AB15
Vss AB23
Vss AB30
Vss AB31
Vss AB32
Vss AB39
Vss AB43
Vss AB47
Vss AB5
Vss AB8
Vss AC2
Vss AC52
Vss AD11
Vss AD15
Vss AD16
Vss AD23
Vss AD24
Vss AD30
Vss AD31
Vss AD32
Vss AD34
Vss AD42
Vss AD46
Vss AD47
Vss AD49
Vss AD51
Vss AD7
Vss AE2
Vss AE4
Vss AF12
Vss AF35
PCH Mobile
Ball Name Ball #
Vss AF39
Vss AF45
Vss AF46
Vss AF49
Vss AF5
Vss AF8
Vss AG2
Vss AG52
Vss AH11
Vss AH15
Vss AH16
Vss AH24
Vss AH32
Vss AH43
Vss AH47
Vss AH48
Vss AH49
Vss AH7
Vss AJ19
Vss AJ2
Vss AJ20
Vss AJ22
Vss AJ23
Vss AJ26
Vss AJ28
Vss AJ32
Vss AJ34
Vss AJ4
Vss AK12
Vss AK22
Vss AK23
Vss AK26
Vss AK28
Vss AK30
Vss AK31
Vss AK32
Vss AK34
Vss AK35
Vss AK38
Vss AK39
Vss AK43
Vss AK45
Vss AK46
Vss AK49
PCH Mobile
Ball Name Ball #
303 Datasheet
Ballout Definition
Vss AK5
Vss AK8
Vss AL2
Vss AL52
Vss AM11
Vss AM19
Vss AM20
Vss AM22
Vss AM24
Vss AM26
Vss AM28
Vss AM30
Vss AM31
Vss AM32
Vss AM34
Vss AM35
Vss AM38
Vss AM39
Vss AM41
Vss AM42
Vss AM46
Vss AM49
Vss AM5
Vss AM6
Vss AM7
Vss AN19
Vss AN32
Vss AN50
Vss AN52
Vss AP12
Vss AP13
Vss AP42
Vss AP46
Vss AP49
Vss AP5
Vss AP8
Vss AR2
Vss AR52
Vss AT11
Vss AT12
Vss AT13
Vss AT32
Vss AT36
Vss AT41
PCH Mobile
Ball Name Ball #
Vss AT47
Vss AT5
Vss AT7
Vss AT8
Vss AU20
Vss AU4
Vss AV12
Vss AV14
Vss AV16
Vss AV20
Vss AV22
Vss AV24
Vss AV30
Vss AV34
Vss AV38
Vss AV42
Vss AV46
Vss AV49
Vss AV5
Vss AV8
Vss AW14
Vss AW18
Vss AW2
Vss AW32
Vss AW36
Vss AW40
Vss AW52
Vss AY11
Vss AY43
Vss AY47
Vss AY7
Vss B11
Vss B15
Vss B19
Vss B23
Vss B31
Vss B35
Vss B39
Vss B43
Vss B47
Vss B7
Vss BA12
Vss BA42
Vss BB10
PCH Mobile
Ball Name Ball #
Vss BB12
Vss BB16
Vss BB20
Vss BB24
Vss BB30
Vss BB34
Vss BB38
Vss BB42
Vss BB44
Vss BB49
Vss BB5
Vss BC10
Vss BC14
Vss BC18
Vss BC2
Vss BC22
Vss BC32
Vss BC36
Vss BC40
Vss BC44
Vss BC52
Vss BD48
Vss BD49
Vss BD5
Vss BE12
Vss BE16
Vss BE20
Vss BE24
Vss BE30
Vss BE34
Vss BE38
Vss BE42
Vss BE46
Vss BE48
Vss BE50
Vss BE6
Vss BE8
Vss BF3
Vss BF49
Vss BF51
Vss BF9
Vss BG12
Vss BG18
Vss BG24
PCH Mobile
Ball Name Ball #
Datasheet 304
Ballout Definition
Vss BG4
Vss BG50
Vss BH11
Vss BH15
Vss BH19
Vss BH23
Vss BH31
Vss BH35
Vss BH39
Vss BH43
Vss BH47
Vss BH7
Vss BH9
Vss C12
Vss C50
Vss D51
Vss E12
Vss E16
Vss E20
Vss E24
Vss E30
Vss E34
Vss E38
Vss E42
Vss E46
Vss E48
Vss E6
Vss E8
Vss F49
Vss F5
Vss G10
Vss G14
Vss G18
Vss G2
Vss G22
Vss G32
Vss G36
Vss G40
Vss G44
Vss G52
Vss H16
Vss H20
Vss H30
Vss H34
PCH Mobile
Ball Name Ball #
Vss H38
Vss H42
Vss H49
Vss H5
Vss J24
Vss K11
Vss K43
Vss K47
Vss K7
Vss L14
Vss L18
Vss L2
Vss L22
Vss L32
Vss L36
Vss L40
Vss L52
Vss M12
Vss M16
Vss M20
Vss M34
Vss M38
Vss M42
Vss M46
Vss M49
Vss M5
Vss M8
Vss N24
Vss N38
Vss P11
Vss P16
Vss P22
Vss P30
Vss P32
Vss P34
Vss P38
Vss P42
Vss P45
Vss P47
Vss P49
Vss R2
Vss R52
Vss T12
Vss T41
PCH Mobile
Ball Name Ball #
Vss T43
Vss T46
Vss T49
Vss T5
Vss T8
Vss U30
Vss U31
Vss U32
Vss U34
Vss V11
Vss V19
Vss V20
Vss V22
Vss V30
Vss V31
Vss V32
Vss V34
Vss V35
Vss V38
Vss V43
Vss V45
Vss V46
Vss V47
Vss V49
Vss V5
Vss V7
Vss V8
Vss W2
Vss W52
Vss Y11
Vss Y12
Vss Y13
Vss Y15
Vss Y19
Vss Y23
Vss Y28
Vss Y30
Vss Y31
Vss Y32
Vss Y38
Vss Y43
Vss Y46
Vss Y47
Vss Y5
PCH Mobile
Ball Name Ball #
305 Datasheet
Ballout Definition
Vss Y6
Vss Y8
Vss AB16
Vss AN34
Vss AD12
Vss P24
Vss_NCTF A4
Vss_NCTF A49
Vss_NCTF A5
Vss_NCTF A50
Vss_NCTF A52
Vss_NCTF A53
Vss_NCTF B2
Vss_NCTF B4
Vss_NCTF B52
Vss_NCTF B53
Vss_NCTF BE1
Vss_NCTF BE53
Vss_NCTF BF1
Vss_NCTF BF53
Vss_NCTF BH1
Vss_NCTF BH2
Vss_NCTF BH52
Vss_NCTF BH53
Vss_NCTF BJ1
Vss_NCTF BJ2
Vss_NCTF BJ4
Vss_NCTF BJ49
Vss_NCTF BJ5
Vss_NCTF BJ50
Vss_NCTF BJ52
Vss_NCTF BJ53
Vss_NCTF D1
Vss_NCTF D2
Vss_NCTF D53
Vss_NCTF E1
Vss_NCTF E53
VssA_DAC AF51
VssA_DAC AF53
VssA_LVDS AH39
WAKE# J12
XCLK_RCOMP AF38
XTAL25_IN AH51
XTAL25_OUT AH53
PCH Mobile
Ball Name Ball #
Datasheet 306
Ballout Definition
6.3 PCH Ballout Small Form Factor Ballout
This section contains the PCH Mobile Small Form Factor (SFF) ballout. Figure 6-5 and
Figure 6-6 show the ballout from a top of the package quadrant view. Table 6 - 3 is the
BGA ball list, sorted alphabetically by signal name.
307 Datasheet
Ballout Definition
Figure 6-5. PCH ballout (top view—left side) (Mobile SFF Only)
51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26
BE Vss_NCT
F
Vss_NCT
F
Vss_NCT
F
DDPB_0
P
DDPB_2
P
DDPB_3
P
DDPC_1
P
DDPD_1
N
DDPD_0
P
DDPD_2
PPETn8 PERn7 PETn5 PERn2 BE
BD Vss_NCT
F
Vss_NCT
FVss Vss DDPB_1
PVss DDPC_0
PVss DDPB_H
PD Vss PERn8 Vss PERn4 Vss BD
BC Vss_NCT
FVss DDPB_0
N
DDPB_2
N
DDPB_3
N
DDPC_1
N
DDPD_1
P
DDPD_0
N
DDPD_2
NPETp8 PERp7 PETp5 PERp2 BC
BB Vss Vss Vss DDPB_1
NVss DDPC_0
NVss DDPC_H
PD VSS PERp8 VSS PERp4 VSS BB
BA TP4 TP5 Vss DDPD_A
UXP
DDPC_A
UXN
DDPB_A
UXN
SDVO_I
NTN
DDPC_2
P
DDPC_3
NDDPD_3P PETn6 PERp5 PERp3 BA
AY TP6 TP7 Vss DDPD_A
UXN Vss Vss Vss Vss Vss Vss Vss Vss Vss AY
AW CLKOUT
_PCIE1P
CLKOUT
_PCIE1N Vss Vss DDPC_A
UXP
DDPB_A
UXP
SDVO_I
NTP
DDPC_2
N
DDPC_3
PDDPD_3N PETp6 PERn5 PERn3 AW
AV Vss Vss LVDSA_
DATA1
LVDSA_
DATA#1 Vss Vss Vss Vss Vss Vss Vss Vss Vss AV
AU CLKOUT
_PCIE3P
CLKOUT
_PCIE3N Vss Vss Vss Vss
SDVO_T
VCLKIN
N
DDPD_H
PD
SDVO_S
TALLN PERn6 PETp7 PETn4 PETn3 AU
AT CLKOUT
_PCIE2P
CLKOUT
_PCIE2N
LVDSA_
DATA#3
LVDSA_
DATA3 Vss Vss Vss Vss Vss Vss Vss Vss Vss AT
AR CLKOUT
_PCIE4P
CLKOUT
_PCIE4N Vss Vss LVDSA_
DATA0
LVDSA_
DATA#0
SDVO_T
VCLKINP Vss SDVO_S
TALLP PERp6 PETn7 PETp4 PETp3 AR
AP Vss Vss LVDSA_
CLK
LVDSA_
CLK# Vss Vss Vss Vss Vss Vss Vss Vss Vss AP
AN CLKOUT
_PCIE6P
CLKOUT
_PCIE6N Vss Vss LVDSA_
DATA#2
LVDSA_
DATA2 AN
AM CLKOUT
_PCIE0P
CLKOUT
_PCIE0N
LVDS B _
DATA#2
LVDSB_
DATA2 Vss Vss Vcc3_3 VSS VccADPL
LA
VccADPLL
BVss Vss Vss VccAPLL
EXP AM
AL CLKOUT
_PCIE5P
CLKOUT
_PCIE5N Vss Vss LVDSB_
DATA0
LVDS B _
DATA#0 AL
AK Vss Vss LVDS B _
DATA1
LVDSB_
DATA#1 Vss Vss Vss Vss Vss Vss Vss Vss VccIO VccIO AK
AJ CLKOUT
_PCIE7P
CLKOUT
_PCIE7N Vss Vss LVDSB_
DATA#3
LVDS B _
DATA3 AJ
AH
CLKOUT
_PEG_B
_P
CLKOUT
_PEG_B
_N
LVDS B _
CLK#
LVDSB_
CLK Vss Vss VCCTX_
LVDS
VCCTX_
LVDS Vss Vss VccCore VccCore VccCore VccCore AH
AG
CLKOUT
_PEG_A
_P
CLKOUT
_PEG_A
_N
Vss Vss LVD_VR
EFH
LVD_VR
EFL AG
AF VssVssVssVssVssVss
VCCTX_
LVDS
VCCTX_
LVDS VccIO VccIO Vss Vss VccCore VccCore AF
AE VccA_CL
K
XCLK_R
COMP TP16 TP17 LVD_IB
G
LVD_ VB
GAE
AD XTAL25_
IN
XTAL25_
OUT VssVssVssVss
VccA_LV
DS
VSSA_L
VDS VccIO VccIO VccME VccME Vss Vss AD
AC CRT_DD
C_DATA
DDPD_C
TRLCLK
VssA_D
AC
VccADA
C
CRT_IRT
NNC_2 Vss Vss Vss Vss VccME VccME Vss Vss AC
AB Vss Vss Vss Vss Vss Vss Vcc3_3 Vcc3_3 Vcc3_3 Vcc3_3 VccME VccME Vss Vss AB
AA
DDPD_C
TRLDAT
A
CRT_DD
C_CLK
CRT_BL
UE
CRT_GR
EEN
CRT_RE
DNC_3 AA
YSDVO_C
TRLCLK
SDVO_C
TRLDAT
A
Vss Vss Vss Vss Vcc3_3 Vcc3_3 Vss Vss Vss VccME VccME VccME Y
WL_DDC_
DATA
L_BKLTE
N
CRT_HS
YNC
CRT_VS
YNC
DAC_IR
EF NC_1 W
VVss Vss Vss Vss Vss Vss Vss VccME VccME Vss Vss VccME VccME VccME V
UL_VDD_
EN
L_BKLTC
TL
DDPC_C
TRLCLK
DDPC_C
TRLDAT
A
L_DDC_
CLK NC_4 U
TL_CTRL_
DATA
L_CTRL_
CLK VssVssVssVssVss
VccME1
_1 VccME Vss Vss Vss Vss VSS T
RCLKOUT
_PCI2
CLKOUT
_PCI4
REFCLK
14IN
CLKOUT
_PCI1
CLKOUT
FLEX2 /
GPIO66
CLKOUT
FLEX1 /
GPIO65
R
PVss Vss Vss Vss Vss Vss Vcc3_3 Vcc3_3 Vcc3_3 Vcc3_3 Vcc3_3 Vcc3_3 Vss VccSus3
_3 P
N
CLKOUT
FLEX0 /
GPIO64
CLKOUT
_PCI3 Vss
CLKOUT
FLEX3 /
GPIO67
CLKOUT
_PCI0 NC_5 N
MREQ3# /
GPIO54
PIRQF#
/ GPIO3 Vss Vss Vss Vss Vss Vss Vss Vss Vss Vss Vss M
LAD12 AD13 AD16 AD22 AD24 AD30 REQ0# PIRQB# REQ2# /
GPIO52 TP17 TP16 TP14 VccSusH
DA L
KVss AD14 Vss Vss Vss Vss Vss Vss Vss Vss Vss Vss Vss K
JAD15 AD18 C/BE0# GNT3# /
GPIO55 PERR# C/BE2# AD9 TRDY# AD6 V5REF TP15 HDA_SD
IN1
USBP12
NJ
HGNT0# GNT1# /
GPIO51 Vss Vss Vss Vss Vss Vss Vss Vss Vss Vss Vss H
GAD21 PIRQC# AD1 AD28 FRAME# AD31 AD3 STOP# AD25 FWH4 /
LFRAME#
LDRQ1#
/
GPIO23
HDA_SD
O
USBP12
PG
FVss C/BE3# Vss Vss Vss Vss Vss Vss Vss Vss Vss Vss Vss F
ESERR# AD26 PAR AD23 AD27 REQ1# /
GPIO50 AD2 GPIO1 GPIO7
HDA_DOC
K_EN# /
GPIO33
FWH0 /
LAD0
HDA_SY
NC
HDA_BC
LK E
DPIRQE#
/ GPIO2
DEVSEL
#C/BE1# PIRQG#
/ GPIO4 Vss PLOCK# Vss AD11 Vss FWH1 /
LAD1 Vss HDA_SD
IN3 Vss D
CVss_NCT
FVss AD17 AD5 AD29 GNT2# /
GPIO53 AD4AD19AD7GPIO17
FWH2 /
LAD2
HDA_RS
T#
USBRBI
AS# C
BVss_NCT
F
Vss_NCT
FVss Vss PIRQD# Vss AD0 Vss PIRQA# Vss FWH3 /
LAD3 Vss HDA_SD
IN0 Vss B
AVss_NCT
F
Vss_NCT
F
Vss_NCT
FAD10 PIRQH#
/ GPIO5
CLKIN_P
CILOOP
BACK
AD8 AD20 IRDY# GPIO6
HDA_DOC
K_RST# /
GPIO13
LDRQ0# HDA_SD
IN2
USBRBI
AS A
51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26
Ballout Definition
308 Datasheet
Figure 6-6. PCH ballout (top view—right side) (Mobile SFF Only)
25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
BE PETp1 DMI1TXP DMI0RXP DMI1RXN DMI2RXP DMI3TXN FDI_RXP
4FDI_INT FDI_LSY
NC0
PROCPW
RGD
THRMTRI
P#
Vss_NCT
F
Vss_NCT
F
Vss_NCT
FBE
BD Vss Vss DMI2TXN Vss VCCFDIP
LL Vss FDI_RXP
2Vss PMSYNC
HVss Vss Vss_NCT
F
Vss_NCT
FBD
BC PETn1 DMI1TXN DMI0RXN DMI1RXP DMI2RXN DMI3TXP FDI_RXN
4
FDI_LSY
NC1
FDI_FSY
NC1 PECI Reserved Vss Vss_NCT
FBC
BB Vss Vss DMI2TXP Vss VSS Vss FDI_RXN
2Vss FDI_FSY
NC0 Vss Reserved Reserved BB
BA PERn1 CLKIN_D
MI_N
DMI_ZCO
MP DMI0TXN DMI3RXP FDI_RXP
1
FDI_RXP
6
FDI_RXP
7Reserved Reserved Reserved Reserved Reserved BA
AY Vss Vss Vss Vss VSS Vss Vss Vss Vss Vss Vss Vss AY
AW PERp1 CLKIN_D
MI_P
DMI_IRC
OMP DMI0TXP DMI3RXN FDI_RXN
1
FDI_RXN
6
FDI_RXN
7Reserved Reserved Reserved Reserved Reserved AW
AV Vss Vss Vss Vss Vss Vss Vss Vss Vss Vss Reserved Reserved AV
AU PETn2 TP1 TP2 TP3 FDI_RXN
0
FDI_RXP
3
FDI_RXN
5VSS Reserved Reserved Reserved NV_ALE NV_CLE AU
AT Vss Vss Vss Vss Vss Vss Vss Vss Vss Vss Reserved Vss AT
AR PETp2 VccVRM VccVRM VccVRM FDI_RXP
0
FDI_RXN
3
FDI_RXP
5Reserved Reserved Reserved Reserved Reserved Reserved AR
AP Vss VccVRM Vss DMIRXTE
RM
FDIRXTE
RM Vss Vss Vss Vss Vss CLKIN_B
CLK_N
CLKIN_B
CLK_P AP
AN Reserved Reserved SPI_MOS
I
SPI_MIS
O
CLKOUT_
DP_N /
CLKOUT_
BCLK1_N
CLKOUT_
DP_P /
CLKOUT_
BCLK1_P
AN
AM VccIO VccIO VccIO VccIO VccIO VccIO VccIO Vss Vss Vss Vss Vss Vss Vss AM
AL Reserved SPI_CS1
#
SPI_CS0
#SPI_CLK CLKOUT_
DMI_N
CLKOUT_
DMI_P AL
AK Vss VccIO Vss VccIO V_CPU_I
O
V_CPU_I
OVssVssVssVssVssVss
CLKOUT_
BCLK0_P
/
CLKOUT_
PCIE8P
CLKOUT_
BCLK0_N
/
CLKOUT_
PCIE8N
AK
AJ Vcc3_3 TP8 SATA0RX
N
SATA0RX
PVss VCCSATA
PLL AJ
AH Vss Vss Vcc_DMI Vss VccPNAN
D
VccPNAN
DVccE3_3 VccE3_3 VSS Vss Vss VSS Vss Vss AH
AG SATA0TX
N
SATA0TX
P
CLKIN_S
ATA_ P /
CKSSCD
_P
CLKIN_S
ATA_ N /
CKSSCD
_N
SATA1TX
N
SATA1TX
PAG
AF VccCore VccCore VccLAN VccLAN VccPNAN
D
VccPNAN
DVccE3_3 VccME3_
3
SATAICO
MPI
SATAICO
MPO Vss Vss Vss Vss AF
AE SATA2RX
N
SATA2RX
P
SATA2TX
N
SATA2TX
P
SATA1RX
P
SATA1RX
NAE
AD VccCore VccCore Vss Vss VccIO Vss VccIO VccIO Vss VSS Vss Vss Vss Vss AD
AC VccCore VccCore Vss Vss VccIO VccIO VccIO VccIO SATA3RX
P
SATA3RX
N
SATA3TX
P
SATA3TX
N
SATA4RX
N
SATA4RX
PAC
AB VccCore VccCore Vss Vss VccIO VccIO VccIO VccIO Vss Vss Vss Vss Vss Vss AB
AA SATA5RX
N
SATA5RX
P
SATA5TX
P
SATA5TX
N
SATA4TX
N
SATA4TX
PAA
YVSS VccCore VccCore Vss Vcc3_3 Vcc3_3 Vss Vss Vss Vss Vss Vss Vss Vss Y
W
SATA5GP
/ GPIO49
/
TMP_ALE
RT#
SATA4GP
/ GPIO16 SERIRQ BMBUSY
# / GPIO0
SDATAO
UT1 /
GPIO48
CLKRUN
# /
GPIO32
W
VVss VccIO VccIO VccIO Vss Vss DcpSusB
yp
DcpSusB
yp Vss A20GATE Vss Vss SATA2GP
/ GPIO36
SATA1GP
/ GPIO19 V
UCL_CLK1 TP23 SATALED
#
SCLOCK /
GPIO22 RCIN# SPKR U
TVccSus3_
3VccIO Vss VccIO VccIO VccIO Vss Vss Vss CL_DATA
1Vss Vss SATA0GP
/ GPIO21 Vss T
R
PCIECLK
RQ1# /
GPIO18
PEG_A_C
LKRQ# /
GPIO47
PWRBTN
#GPIO35 SLOAD /
GPIO38
SDATAO
UT0 /
GPIO39
R
PVccSus3_
3
VccSus3_
3
VccSus3_
3Vss VccSus3_
3
VccSus3_
3
VccSus3_
3
VccSus3_
3Vss CL_RST1
#VSS Vss SYS_RES
ET#
INIT3_3V
#P
NDcpSST SYS_PW
ROK
ACPRES
ENT /
GPIO31
STP_PCI
# /
GPIO34
SUS_PW
R_DN_A
CK /
GPIO30
PCIECLK
RQ2# /
GPIO20
N
MVss Vss Vss Vss Vss Vss Vss MEPWRO
KVss Vss SATA3GP
/ GPIO37 Vss M
LUSBP9N USBP6P Vss USBP1P TP10 DcpRTC SUSCLK /
GPIO62 SMBCLK SLP_M# PME# JTAG_TDI GPIO27 GPIO28 L
KVss Vss Vss Vss Vss Vss Vss RI# Vss Vss
PCIECLK
RQ0# /
GPIO73
SUS_STA
T# /
GPIO61
K
JUSBP9P USBP6N V5REF_S
US USBP1N TP9 SRTCRS
T# TP17
SMBALE
RT# /
GPIO11
SML0DAT
A
PCIECLK
RQ6# /
GPIO45
JTAG_TC
K
JTAG_TM
STRST# J
HVss Vss Vss Vss Vss Vss Vss Vss SLP_S5#
/ GPIO63 Vss
PCIECLK
RQ7# /
GPIO46
Vss H
GUSBP13P USBP7N USBP4N USBP3N CLKIN_D
OT_96N
INTRUDE
R#
OC2# /
GPIO41 TP24 GPIO8 GPIO24 GPIO15
PCIECLK
RQ5# /
GPIO44
JTAG_TD
OG
FVss Vss Vss Vss Vss Vss Vss Vss Vss
LAN_PHY
_PWR_C
TRL /
GPIO12
SLP_S3# PCIRST# F
EUSBP13N USBP7P USBP4P USBP3P CLKIN_D
OT_96P
OC1# /
GPIO40 VccRTC INTVRME
N
SML0ALE
RT# /
GPIO60
SML1ALE
RT# /
GPIO74
SLP_LAN
# /
GPIO29
Vss Vss_NCT
FE
DUSBP10N Vss USBP2P Vss PWROK RSMRST
#
OC7# /
GPIO14
OC6# /
GPIO10
PCIECLK
RQ3# /
GPIO25
DRAMPW
ROK PLTRST# SLP_S4# D
CUSBP11N USBP8N USBP5N USBP0P OC5# /
GPIO9
OC3# /
GPIO42 RTCX2 LAN_RST
#
OC0# /
GPIO59 WAKE#
BATLOW
# /
GPIO72
PCIECLK
RQ4# /
GPIO26
Vss_NCT
FC
BUSBP10P Vss USBP2N Vss RTCRST# Vss SML1CLK
/ GPIO58 Vss SML0CLK Vss Vss Vss_NCT
FB
AUSBP11P USBP8P USBP5P USBP0N
SML1DAT
A /
GPIO75
OC4# /
GPIO43 RTCX1 SMBDAT
A
PEG_B_C
LKRQ# /
GPIO56
GPIO57 Vss_NCT
F
Vss_NCT
FA
25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
Datasheet 309
Ballout Definition
Table 6-3. PCH Ballout by Signal name (Mobile SFF Only)
PCH SFF
Ball Name Ball #
A20GATE V10
ACPRESENT /
GPIO31 N7
AD0 B40
AD1 G47
AD2 E39
AD3 G39
AD4 C39
AD5 C45
AD6 J35
AD7 C35
AD8 A41
AD9 J39
AD10 A47
AD11 D36
AD12 L51
AD13 L49
AD14 K48
AD15 J51
AD16 L47
AD17 C47
AD18 J49
AD19 C37
AD20 A39
AD21 G51
AD22 L45
AD23 E45
AD24 L43
AD25 G35
AD26 E49
AD27 E43
AD28 G45
AD29 C43
AD30 L41
AD31 G41
BATLOW# / GPIO72 C5
C/BE0# J47
C/BE1# D46
C/BE2# J41
C/BE3# F48
CL_CLK1 U11
CL_DATA1 T10
CL_RST1# P10
CLKIN_BCLK_N AP4
CLKIN_BCLK_P AP2
CLKIN_DMI_N BA23
CLKIN_DMI_P AW23
CLKIN_DOT_96N G17
CLKIN_DOT_96P E17
CLKIN_PCILOOPBA
CK A43
CLKIN_SATA_N /
CKSSCD_N AG5
CLKIN_SATA_P /
CKSSCD_P AG7
CLKOUT_BCLK0_N /
CLKOUT_PCIE8N AK2
CLKOUT_BCLK0_P /
CLKOUT_PCIE8P AK4
CLKOUT_DMI_N AL3
CLKOUT_DMI_P AL1
CLKOUT_DP_N /
CLKOUT_BCLK1_N AN3
CLKOUT_DP_P /
CLKOUT_BCLK1_P AN1
CLKOUT_PCI0 N43
CLKOUT_PCI1 R45
CLKOUT_PCI2 R51
CLKOUT_PCI3 N49
CLKOUT_PCI4 R49
CLKOUT_PCIE0N AM48
CLKOUT_PCIE0P AM50
CLKOUT_PCIE1N AW49
CLKOUT_PCIE1P AW51
CLKOUT_PCIE2N AT48
CLKOUT_PCIE2P AT50
CLKOUT_PCIE3N AU49
CLKOUT_PCIE3P AU51
CLKOUT_PCIE4N AR49
CLKOUT_PCIE4P AR51
CLKOUT_PCIE5N AL49
CLKOUT_PCIE5P AL51
PCH SFF
Ball Name Ball #
CLKOUT_PCIE6N AN49
CLKOUT_PCIE6P AN51
CLKOUT_PCIE7N AJ49
CLKOUT_PCIE7P AJ51
CLKOUT_PEG_A_N AG49
CLKOUT_PEG_A_P AG51
CLKOUT_PEG_B_N AH48
CLKOUT_PEG_B_P AH50
CLKOUTFLEX0 /
GPIO64 N51
CLKOUTFLEX1 /
GPIO65 R41
CLKOUTFLEX2 /
GPIO66 R43
CLKOUTFLEX3 /
GPIO67 N45
CLKRUN# / GPIO32 W1
CRT_BLUE AA47
CRT_DDC_CLK AA49
CRT_DDC_DATA AC51
CRT_GREEN AA45
CRT_HSYNC W47
CRT_IRTN AC43
CRT_RED AA43
CRT_VSYNC W45
DAC_IREF W43
DcpRTC L15
DcpSST N11
DcpSus T18
DcpSus T19
DcpSusByp V14
DcpSusByp V16
DDPB_0N BC47
DDPB_0P BE47
DDPB_1N BB44
DDPB_1P BD44
DDPB_2N BC45
DDPB_2P BE45
DDPB_3N BC43
DDPB_3P BE43
DDPB_AUXN BA41
PCH SFF
Ball Name Ball #
310 Datasheet
Ballout Definition
DDPB_AUXP AW41
DDPB_HPD BD36
DDPC_0N BB40
DDPC_0P BD40
DDPC_1N BC41
DDPC_1P BE41
DDPC_2N AW37
DDPC_2P BA37
DDPC_3N BA35
DDPC_3P AW35
DDPC_AUXN BA43
DDPC_AUXP AW43
DDPC_CTRLCLK U47
DDPC_CTRLDATA U45
DDPC_HPD BB36
DDPD_0N BC37
DDPD_0P BE37
DDPD_1N BE39
DDPD_1P BC39
DDPD_2N BC35
DDPD_2P BE35
DDPD_3N AW33
DDPD_3P BA33
DDPD_AUXN AY44
DDPD_AUXP BA45
DDPD_CTRLCLK AC49
DDPD_CTRLDATA AA51
DDPD_HPD AU37
DEVSEL# D48
DMI_IRCOMP AW21
DMI_ZCOMP BA21
DMI0RXN BC21
DMI0RXP BE21
DMI0TXN BA19
DMI0TXP AW19
DMI1RXN BE19
DMI1RXP BC19
DMI1TXN BC23
DMI1TXP BE23
DMI2RXN BC17
DMI2RXP BE17
PCH SFF
Ball Name Ball #
DMI2TXN BD20
DMI2TXP BB20
DMI3RXN AW17
DMI3RXP BA17
DMI3TXN BE15
DMI3TXP BC15
DRAMPWROK D6
FDI_FSYNC0 BB8
FDI_FSYNC1 BC9
FDI_INT BE11
FDI_LSYNC0 BE9
FDI_LSYNC1 BC11
FDI_RXN0 AU17
FDI_RXN1 AW15
FDI_RXN2 BB12
FDI_RXN3 AR15
FDI_RXN4 BC13
FDI_RXN5 AU13
FDI_RXN6 AW13
FDI_RXN7 AW11
FDI_RXP0 AR17
FDI_RXP1 BA15
FDI_RXP2 BD12
FDI_RXP3 AU15
FDI_RXP4 BE13
FDI_RXP5 AR13
FDI_RXP6 BA13
FDI_RXP7 BA11
FRAME# G43
FWH0 / LAD0 E31
FWH1 / LAD1 D32
FWH2 / LAD2 C31
FWH3 / LAD3 B32
FWH4 / LFRAME# G33
GNT0# H50
GNT1# / GPIO51 H48
GNT2# / GPIO53 C41
GNT3# / GPIO55 J45
GPIO0 W5
GPIO1 E37
GPIO6 A35
PCH SFF
Ball Name Ball #
GPIO7 E35
GPIO8 G9
GPIO15 G5
GPIO17 C33
GPIO24 G7
GPIO27 L3
GPIO28 L1
GPIO35 R5
GPIO57 A7
HDA_BCLK E27
HDA_DOCK_EN# /
GPIO33 E33
HDA_DOCK_RST# /
GPIO13 A33
HDA_RST# C29
HDA_SDIN0 B28
HDA_SDIN1 J29
HDA_SDIN2 A29
HDA_SDIN3 D28
HDA_SDO G29
HDA_SYNC E29
INIT3_3V# P2
INTRUDER# G15
INTVRMEN E11
IRDY# A37
JTAG_TCK J5
JTAG_TDI L5
JTAG_TDO G1
JTAG_TMS J3
L_BKLTCTL U49
L_BKLTEN W49
L_CTRL_CLK T48
L_CTRL_DATA T50
L_DDC_CLK U43
L_DDC_DATA W51
L_VDD_EN U51
LAN_PHY_PWR_CTR
L / GPIO12 F6
LAN_RST# C11
LDRQ0# A31
LDRQ1# / GPIO23 G31
LVD_IBG AE43
PCH SFF
Ball Name Ball #
Datasheet 311
Ballout Definition
LVD_VBG AE41
LVD_VREFH AG43
LVD_VREFL AG41
LVDSA_CLK AP46
LVDSA_CLK# AP44
LVDSA_DATA#0 AR41
LVDSA_DATA#1 AV44
LVDSA_DATA#2 AN43
LVDSA_DATA#3 AT46
LVDSA_DATA0 AR43
LVDSA_DATA1 AV46
LVDSA_DATA2 AN41
LVDSA_DATA3 AT44
LVDSB_CLK AH44
LVDSB_CLK# AH46
LVDSB_DATA#0 AL41
LVDSB_DATA#1 AK44
LVDSB_DATA#2 AM46
LVDSB_DATA#3 AJ43
LVDSB_DATA0 AL43
LVDSB_DATA1 AK46
LVDSB_DATA2 AM44
LVDSB_DATA3 AJ41
MEPWROK M10
NC_1 W41
NC_2 AC41
NC_3 AA41
NC_4 U41
NC_5 N41
NV_ALE AU3
NV_CLE AU1
OC0# / GPIO59 C9
OC1# / GPIO40 E15
OC2# / GPIO41 G13
OC3# / GPIO42 C15
OC4# / GPIO43 A15
OC5# / GPIO9 C17
OC6# / GPIO10 D10
OC7# / GPIO14 D12
PAR E47
PCH SFF
Ball Name Ball #
PCIECLKRQ0# /
GPIO73 K4
PCIECLKRQ1# /
GPIO18 R11
PCIECLKRQ2# /
GPIO20 N1
PCIECLKRQ3# /
GPIO25 D8
PCIECLKRQ4# /
GPIO26 C3
PCIECLKRQ5# /
GPIO44 G3
PCIECLKRQ6# /
GPIO45 J7
PCIECLKRQ7# /
GPIO46 H4
PCIRST# F2
PECI BC7
PEG_A_CLKRQ# /
GPIO47 R9
PEG_B_CLKRQ# /
GPIO56 A9
PERn1 BA25
PERn2 BE27
PERn3 AW27
PERn4 BD28
PERn5 AW29
PERn6 AU33
PERn7 BE31
PERn8 BD32
PERp1 AW25
PERp2 BC27
PERp3 BA27
PERp4 BB28
PERp5 BA29
PERp6 AR33
PERp7 BC31
PERp8 BB32
PERR# J43
PETn1 BC25
PETn2 AU25
PETn3 AU27
PETn4 AU29
PETn5 BE29
PCH SFF
Ball Name Ball #
PETn6 BA31
PETn7 AR31
PETn8 BE33
PETp1 BE25
PETp2 AR25
PETp3 AR27
PETp4 AR29
PETp5 BC29
PETp6 AW31
PETp7 AU31
PETp8 BC33
PIRQA# B36
PIRQB# L37
PIRQC# G49
PIRQD# B44
PIRQE# / GPIO2 D50
PIRQF# / GPIO3 M48
PIRQG# / GPIO4 D44
PIRQH# / GPIO5 A45
PLOCK# D40
PLTRST# D4
PME# L7
PMSYNCH BD8
PROCPWRGD BE7
PWRBTN# R7
PWROK D16
RCIN# U3
REFCLK14IN R47
REQ0# L39
REQ1# / GPIO50 E41
REQ2# / GPIO52 L35
REQ3# / GPIO54 M50
Reserved AU7
Reserved AW3
Reserved AL11
Reserved BA7
Reserved AT4
Reserved BA3
Reserved AN9
Reserved AN11
Reserved AW7
PCH SFF
Ball Name Ball #
312 Datasheet
Ballout Definition
Reserved BB2
Reserved BB4
Reserved AW9
Reserved BA9
Reserved BC5
Reserved AR7
Reserved AR5
Reserved AR1
Reserved AR9
Reserved AR11
Reserved AU5
Reserved AU9
Reserved AW5
Reserved AV2
Reserved BA1
Reserved AV4
Reserved AW1
Reserved AR3
Reserved BA5
RI# K10
RSMRST# D14
RTCRST# B16
RTCX1 A13
RTCX2 C13
SATA0GP / GPIO21 T4
SATA0RXN AJ7
SATA0RXP AJ5
SATA0TXN AG11
SATA0TXP AG9
SATA1GP / GPIO19 V2
SATA1RXN AE1
SATA1RXP AE3
SATA1TXN AG3
SATA1TXP AG1
SATA2GP / GPIO36 V4
SATA2RXN AE11
SATA2RXP AE9
SATA2TXN AE7
SATA2TXP AE5
SATA3GP / GPIO37 M4
SATA3RXN AC9
PCH SFF
Ball Name Ball #
SATA3RXP AC11
SATA3TXN AC5
SATA3TXP AC7
SATA4GP / GPIO16 W9
SATA4RXN AC3
SATA4RXP AC1
SATA4TXN AA3
SATA4TXP AA1
SATA5GP / GPIO49/
TEMP_ALERT# W11
SATA5RXN AA11
SATA5RXP AA9
SATA5TXN AA5
SATA5TXP AA7
SATAICOMPI AF12
SATAICOMPO AF10
SATALED# U7
SCLOCK / GPIO22 U5
SDATAOUT0 /
GPIO39 R1
SDATAOUT1 /
GPIO48 W3
SDVO_CTRLCLK Y50
SDVO_CTRLDATA Y48
SDVO_INTN BA39
SDVO_INTP AW39
SDVO_STALLN AU35
SDVO_STALLP AR35
SDVO_TVCLKINN AU39
SDVO_TVCLKINP AR39
SERIRQ W7
SERR# E51
SLOAD / GPIO38 R3
SLP_LAN# /
GPIO29 E5
SLP_M# L9
SLP_S3# F4
SLP_S4# D2
SLP_S5# / GPIO63 H8
SMBALERT# /
GPIO11 J11
SMBCLK L11
PCH SFF
Ball Name Ball #
SMBDATA A11
SML0ALERT# /
GPIO60 E9
SML0CLK B8
SML0DATA J9
SML1ALERT# /
GPIO74 E7
SML1CLK / GPIO58 B12
SML1DATA /
GPIO75 A17
SPI_CLK AL5
SPI_CS0# AL7
SPI_CS1# AL9
SPI_MISO AN5
SPI_MOSI AN7
SPKR U1
SRTCRST# J15
STOP# G37
STP_PCI# / GPIO34 N5
SUS_PWR_DN_ACK
/ GPIO30 N3
SUS_STAT# /
GPIO61 K2
SUSCLK / GPIO62 L13
SYS_PWROK N9
SYS_RESET# P4
THRMTRIP# BE5
TP1 AU23
TP2 AU21
TP3 AU19
TP4 BA51
TP5 BA49
TP6 AY50
TP7 AY48
TP8 AJ9
TP9 J17
TP10 L17
TP12 AE47
TP13 AE45
TP14 L29
TP15 J31
TP16 L31
PCH SFF
Ball Name Ball #
Datasheet 313
Ballout Definition
TP17 L33
TP18 J13
TP23 U9
TP24 G11
TRDY# J37
TRST# J1
USBP0N A19
USBP0P C19
USBP1N J19
USBP1P L19
USBP2N B20
USBP2P D20
USBP3N G19
USBP3P E19
USBP4N G21
USBP4P E21
USBP5N C21
USBP5P A21
USBP6N J23
USBP6P L23
USBP7N G23
USBP7P E23
USBP8N C23
USBP8P A23
USBP9N L25
USBP9P J25
USBP10N D24
USBP10P B24
USBP11N C25
USBP11P A25
USBP12N J27
USBP12P G27
USBP13N E25
USBP13P G25
USBRBIAS A27
USBRBIAS# C27
V_CPU_IO AK18
V_CPU_IO AK19
V5REF J33
V5REF_Sus J21
Vcc3_3 AB33
PCH SFF
Ball Name Ball #
Vcc3_3 AB34
Vcc3_3 AB36
Vcc3_3 AB38
Vcc3_3 Y36
Vcc3_3 Y38
Vcc3_3 AM38
Vcc3_3 AJ11
Vcc3_3 Y18
Vcc3_3 Y19
Vcc3_3 P30
Vcc3_3 P31
Vcc3_3 P33
Vcc3_3 P34
Vcc3_3 P36
Vcc3_3 P38
VccAClk AE51
VccADAC AC45
VccADPLLA AM34
VccADPLLB AM33
VccALVDS AD38
VccAPLLEXP AM27
VccCore AB24
VccCore AB25
VccCore AC24
VccCore AC25
VccCore AD24
VccCore AD25
VccCore AF24
VccCore AF25
VccCore AF27
VccCore AF28
VccCore AH27
VccCore AH28
VccCore AH30
VccCore AH31
VccCore Y22
VccCore Y24
VccDMI AH22
VCCFDIPLL BD16
VccIO AK27
VccIO AK28
PCH SFF
Ball Name Ball #
VccIO AM19
VccIO AM21
VccIO AM22
VccIO AM24
VccIO AM25
VccIO AM16
VccIO AM18
VccIO T21
VccIO AD19
VccIO AF33
VccIO AF34
VccIO AD16
VccIO AK24
VccIO AK21
VccIO AB14
VccIO AB16
VccIO AB18
VccIO AB19
VccIO AC14
VccIO AC16
VccIO AC18
VccIO AC19
VccIO AD14
VccIO AD33
VccIO AD34
VccIO T24
VccIO V21
VccIO V22
VccIO V24
VccLAN AF21
VccLAN AF22
VccME AB30
VccME AB31
VccME AC30
VccME AC31
VccME AD30
VccME AD31
VccME V34
VccME T34
VccME T36
VccME V36
PCH SFF
Ball Name Ball #
314 Datasheet
Ballout Definition
VccME V27
VccME V28
VccME V30
VccME Y27
VccME Y28
VccME Y30
VccME3_3 AF14
VccME3_3 AF16
VccME3_3 AH14
VccME3_3 AH16
VccPNAND AF18
VccPNAND AF19
VccPNAND AH18
VccPNAND AH19
VccRTC E13
VCCSATAPLL AJ1
VccSus3_3 T25
VccSus3_3 P14
VccSus3_3 P16
VccSus3_3 P18
VccSus3_3 P19
VccSus3_3 P22
VccSus3_3 P24
VccSus3_3 P25
VccSus3_3 P27
VccSusHDA L27
VccTX_LVDS AF36
VccTX_LVDS AF38
VccTX_LVDS AH36
VccTX_LVDS AH38
VccVRM AR21
VccVRM AP22
VccVRM AR19
VccVRM AR23
Vss AP18
Vss AP16
Vss AB10
Vss AB12
Vss AB2
Vss AB21
Vss AB22
PCH SFF
Ball Name Ball #
Vss AB27
Vss AB28
Vss AB4
Vss AB40
Vss AB42
Vss AB44
Vss AB46
Vss AB48
Vss AB50
Vss AB6
Vss AB8
Vss AC21
Vss AC22
Vss AC27
Vss AC28
Vss AC33
Vss AC34
Vss AC36
Vss AC38
Vss AD10
Vss AD12
Vss AD18
Vss AD2
Vss AD21
Vss AD22
Vss AD27
Vss AD28
Vss AD4
Vss AD40
Vss AD42
Vss AD44
Vss AD46
Vss AD6
Vss AD8
Vss AF2
Vss AF30
Vss AF31
Vss AF4
Vss AF40
Vss AF42
Vss AF44
PCH SFF
Ball Name Ball #
Vss AF46
Vss AF48
Vss AF50
Vss AF6
Vss AF8
Vss AG45
Vss AG47
Vss AH10
Vss AH2
Vss AH21
Vss AH24
Vss AH25
Vss AH33
Vss AH34
Vss AH4
Vss AH40
Vss AH42
Vss AH6
Vss AH8
Vss AJ3
Vss AJ45
Vss AJ47
Vss AK10
Vss AK12
Vss AK14
Vss AK16
Vss AK22
Vss AK25
Vss AK30
Vss AK31
Vss AK33
Vss AK34
Vss AK36
Vss AK38
Vss AK40
Vss AK42
Vss AK48
Vss AK50
Vss AK6
Vss AK8
Vss AL45
PCH SFF
Ball Name Ball #
Datasheet 315
Ballout Definition
Vss AL47
Vss AM10
Vss AM12
Vss AM14
Vss AM2
Vss AM28
Vss AM30
Vss AM31
Vss AM4
Vss AM40
Vss AM42
Vss AM6
Vss AM8
Vss AN45
Vss AN47
Vss AP10
Vss AP12
Vss AP14
Vss AP20
Vss AP24
Vss AP26
Vss AP28
Vss AP30
Vss AP32
Vss AP34
Vss AP36
Vss AP38
Vss AP40
Vss AP42
Vss AP48
Vss AP50
Vss AP6
Vss AP8
Vss AR37
Vss AR45
Vss AR47
Vss AT10
Vss AT12
Vss AT14
Vss AT16
Vss AT18
PCH SFF
Ball Name Ball #
Vss AT2
Vss AT20
Vss AT22
Vss AT24
Vss AT26
Vss AT28
Vss AT30
Vss AT32
Vss AT34
Vss AT36
Vss AT38
Vss AT40
Vss AT42
Vss AT6
Vss AT8
Vss AU41
Vss AU43
Vss AU45
Vss AU47
Vss AV10
Vss AV12
Vss AV14
Vss AV16
Vss AV18
Vss AV20
Vss AV22
Vss AV24
Vss AV26
Vss AV28
Vss AV30
Vss AV32
Vss AV34
Vss AV36
Vss AV38
Vss AV40
Vss AV42
Vss AV48
Vss AV50
Vss AV6
Vss AV8
Vss AW45
PCH SFF
Ball Name Ball #
Vss AW47
Vss AY10
Vss AY12
Vss AY14
Vss AY16
Vss AY18
Vss AY2
Vss AY20
Vss AY22
Vss AY24
Vss AY26
Vss AY28
Vss AY30
Vss AY32
Vss AY34
Vss AY36
Vss AY38
Vss AY4
Vss AY40
Vss AY42
Vss AY46
Vss AY6
Vss AY8
Vss B10
Vss B14
Vss B18
Vss B22
Vss B26
Vss B3
Vss B30
Vss B34
Vss B38
Vss B42
Vss B46
Vss B49
Vss B6
Vss BA47
Vss BB10
Vss BB14
Vss BB16
Vss BB18
PCH SFF
Ball Name Ball #
316 Datasheet
Ballout Definition
Vss BB22
Vss BB24
Vss BB26
Vss BB30
Vss BB34
Vss BB38
Vss BB42
Vss BB46
Vss BB48
Vss BB50
Vss BB6
Vss BC3
Vss BC49
Vss BD10
Vss BD14
Vss BD18
Vss BD22
Vss BD24
Vss BD26
Vss BD3
Vss BD30
Vss BD34
Vss BD38
Vss BD42
Vss BD46
Vss BD49
Vss BD6
Vss C49
Vss D18
Vss D22
Vss D26
Vss D30
Vss D34
Vss D38
Vss D42
Vss E3
Vss F10
Vss F12
Vss F14
Vss F16
Vss F18
PCH SFF
Ball Name Ball #
Vss F20
Vss F22
Vss F24
Vss F26
Vss F28
Vss F30
Vss F32
Vss F34
Vss F36
Vss F38
Vss F40
Vss F42
Vss F44
Vss F46
Vss F50
Vss F8
Vss H10
Vss H12
Vss H14
Vss H16
Vss H18
Vss H2
Vss H20
Vss H22
Vss H24
Vss H26
Vss H28
Vss H30
Vss H32
Vss H34
Vss H36
Vss H38
Vss H40
Vss H42
Vss H44
Vss H46
Vss H6
Vss K12
Vss K14
Vss K16
Vss K18
PCH SFF
Ball Name Ball #
Vss K20
Vss K22
Vss K24
Vss K26
Vss K28
Vss K30
Vss K32
Vss K34
Vss K36
Vss K38
Vss K40
Vss K42
Vss K44
Vss K46
Vss K50
Vss K6
Vss K8
Vss L21
Vss M12
Vss M14
Vss M16
Vss M18
Vss M2
Vss M20
Vss M22
Vss M24
Vss M26
Vss M28
Vss M30
Vss M32
Vss M34
Vss M36
Vss M38
Vss M40
Vss M42
Vss M44
Vss M46
Vss M6
Vss M8
Vss N47
Vss P12
PCH SFF
Ball Name Ball #
Datasheet 317
Ballout Definition
§ §
Vss P21
Vss P28
Vss P40
Vss P42
Vss P44
Vss P46
Vss P48
Vss P50
Vss P6
Vss P8
Vss T12
Vss T14
Vss T16
Vss T2
Vss T22
Vss T28
Vss T30
Vss T31
Vss T33
Vss T38
Vss T40
Vss T42
Vss T44
Vss T46
Vss T6
Vss T8
Vss V12
Vss V18
Vss V19
Vss V25
Vss V31
Vss V33
Vss V38
Vss V40
Vss V42
Vss V44
Vss V46
Vss V48
Vss V50
Vss V6
Vss V8
PCH SFF
Ball Name Ball #
Vss Y10
Vss Y12
Vss Y14
Vss Y16
Vss Y2
Vss Y21
Vss Y25
Vss Y31
Vss Y33
Vss Y34
Vss Y4
Vss Y40
Vss Y42
Vss Y44
Vss Y46
Vss Y6
Vss Y8
Vss AU11
Vss AM36
Vss AH12
Vss T27
Vss_NCTF A3
Vss_NCTF A49
Vss_NCTF A5
Vss_NCTF A50
Vss_NCTF A51
Vss_NCTF B2
Vss_NCTF B50
Vss_NCTF B51
Vss_NCTF BC1
Vss_NCTF BC51
Vss_NCTF BD1
Vss_NCTF BD2
Vss_NCTF BD50
Vss_NCTF BD51
Vss_NCTF BE1
Vss_NCTF BE2
Vss_NCTF BE3
Vss_NCTF BE49
Vss_NCTF BE50
Vss_NCTF BE51
PCH SFF
Ball Name Ball #
Vss_NCTF C1
Vss_NCTF C51
Vss_NCTF E1
VssA_DAC AC47
VssA_LVDS AD36
WAKE# C7
XCLK_RCOMP AE49
XTAL25_IN AD50
XTAL25_OUT AD48
PCH SFF
Ball Name Ball #
Ballout Definition
318 Datasheet
Datasheet 319
Package Information
7 Package Information
7.1 PCH package (Desktop Only)
FCBGA package
•Package size: 27 mm x 27 mm
Ball Count: 951
Ball pitch: 0.7 mm
The Desktop package information is shown in Figure 7-1.
Note: All dimensions, unless otherwise specified, are in millimeters.
Package Information
320 Datasheet
Figure 7-1. PCH Desktop Package Drawing
Datasheet 321
Package Information
7.2 PCH package (Mobile Only)
FCBGA package
•Package size: 27 mm x 25 mm
Ball Count: 1071
Ball pitch: 0.6 mm
The PCH Mobile package information is shown in Figure 7-2.
Note: All dimensions, unless otherwise specified, are in millimeters.
Package Information
322 Datasheet
Figure 7-2. PCH B-Step Mobile Package Drawing
Datasheet 323
Package Information
7.3 PCH package (Mobile SFF Only)
FCBGA package
•Package size: 22 mm x 20 mm
Ball Count: 1045 Ball pitch: 0.593 mm
The PCH SFF Mobile package information is shown in Figure 7-3.
Note: All dimensions, unless otherwise specified, are in millimeters.
Package Information
324 Datasheet
§ §
Figure 7-3. PCH Mobile SFF Package Drawing
Datasheet 325
Electrical Characteristics
8 Electrical Characteristics
This chapter contains the DC and AC characteristics for the PCH. AC timing diagrams
are included.
8.1 Thermal Specifications
8.1.1 Desktop Storage Specifications and Thermal Design Power
(TDP)
For desktop thermal information, see the Intel® 5 Series Express Chipset Platform
Controller Hub (PCH) Thermal Mechanical Specifications and Design Guidelines (TMS),
Document # 407051.
8.1.2 Mobile Storage Specifications and Thermal Design Power
(TDP)
NOTES:
1. Refers to a component device that is not assembled in a board or socket and is not
electrically connected to a voltage reference or I/O signal.
2. Specified temperatures are not to exceed values based on data collected. Exceptions for
surface mount reflow are specified by the applicable JEDEC standard. Non-adherence may
affect PCH reliability.
3. Tabsolute storage applies to the unassembled component only and does not apply to the
shipping media, moisture barrier bags, or dessicant.
4. Intel branded products are specified and certified to meet the following temperature and
humidity limits that are given as an example only (Non-Operating Temperature Limit:
-40 °C to 70 °C and Humidity: 50% to 90%, non-condensing with a maximum wet bulb of
28 °C.) Post board attach storage temperature limits are not specified for non-Intel
branded boards.
5. The JEDEC J-JSTD-020 moisture level rating and associated handling practices apply to all
moisture sensitive devices removed from the moisture barrier bag.
6. Nominal temperature and humidity conditions and durations are given and tested within
the constraints imposed by TSUSTAINED storage and customer shelf life in applicable Intel
boxes and bags.
7. The thermal solution needs to ensure that the temperature does not exceed the maximum
junction temperature (Tj,max) limit. See the Embedded Controller Support Provided by
Ibex Peak(IBX) - Technical Update - Rev. 1.5 Document number 390730 for details on how
measure Tj.
Table 8-1. Storage Conditions
Parameter Description Min Max Notes
TABSOLUTE STORAGE
The non-operating device storage temperature.
Damage (latent or otherwise) may occur when
exceeded for any length of time
-55 °C 125 °C 1,2,3
TSUSTAINED STORAGE
The ambient storage temperature (in shipping
media) for a sustained period of time. -5 °C 40 °C 4,5
RHSUSTAINED STORAGE
The maximum device storage relative humidity
for a sustained period of time. 60% @ 24 °C 5,6
TIME SUSTAINED STORAGE
A prolonged or extended period of time;
typically associated with customer shelf life.
0
Months
6
Months 6
Tj (Mobile only) Mobile Thermal Junction Operating Temperature
limits 0 °C 108 °C 7
Electrical Characteristics
326 Datasheet
NOTES:
1. For usage configurations please see the Mobile Ibex Peak Platform Controller Hub (PCH)
Thermal Design Power (TDP) and Scenario Guidance Document # 427704.
8.2 Absolute Maximum and Minimum Ratings
Table 8-3 specifies absolute maximum and minimum ratings. At conditions outside
functional operation condition limits, but within absolute maximum and minimum
ratings, neither functionality nor long-term reliability can be expected. If a device is
returned to conditions within functional operation limits after having been subjected to
conditions outside these limits (but within the absolute maximum and minimum
ratings) the device may be functional, but with its lifetime degraded depending on
exposure to conditions exceeding the functional operation condition limits.
At conditions exceeding absolute maximum and minimum ratings, neither functionality
nor long-term reliability can be expected. Moreover, if a device is subjected to these
conditions for any length of time, it will either not function or its reliability will be
severely degraded when returned to conditions within the functional operating
condition limits.
Although the PCH/ICHx contains protective circuitry to resist damage from Electro -
Static Discharge (ESD), precautions should always be taken to avoid high static
voltages or electric fields.
Table 8-2. Mobile Thermal Design Power
SKU Thermal Design Power (TDP) Notes
QM57 3.5 W 1
HM57 3.5 W 1
HM55 3.5 W 1
PM55 3.5 W 1
QS57 3.4 W 1
Table 8-3. PCH Absolute Maximum Ratings
Parameter Maximum Limits
Voltage on any 5 V Tolerant Pin with respect to Ground (V5REF = 5 V) -0.5 to V5REF + 0.5 V
Voltage on any 3.3 V Pin with respect to Ground -0.5 to Vcc3_3 + 0.4 V
Voltage on any 1.8 V Tolerant Pin with respect to Ground -0.5 to VccVRM + 0.5 V
Voltage on any 1.05 V Tolerant Pin with respect to Ground -0.5 to VccIO + 0.5 V
1.05 V Supply Voltage with respect to VSS -0.5 to 1.3 V
1.8 V Supply Voltage with respect to VSS -0.5 to 3.7 V
3.3 V Supply Voltage with respect to VSS -0.5 to 3.7 V
5.0 V Supply Voltage with respect to VSS -0.5 to 5.5 V
V_CPU_IO Supply Voltage with respect to VSS -0.5 to 1.3 V
1.8 V Supply Voltage for the analog PLL with respect to VSS -0.5 to 1.98 V
Datasheet 327
Electrical Characteristics
8.3 Intel® 5 Series Chipset and Intel® 3400 Series
Chipset Power Supply range
8.4 General DC Characteristics
Note that ICC values in Table 8-5 and Table 8-6 are all pre-silicon estimates. Values will
be updated when characterized on real silicon is completed.
NOTES:
1. G3 state shown to provide an estimate of battery life.
2. Icc (RTC) data is taken with VccRTC at 3.0 V while the system in a mechanical off (G3)
state at room temperature.
Table 8-4. PCH Power Supply Range
Power Supply Minimum Nominal Maximum
1.05 V 1.00 V 1.05 V 1.10 V
1.5 V 1.43 V 1.50 V 1.58 V
1.8 V 1.71 V 1.80 V 1.89 V
3.3 V 3.14 V 3.30 V 3.47 V
5 V 4.75 V 5.00 V 5.25 V
Table 8-5. Measured ICC (Desktop Only)
Voltage Rail Voltage
(V)
S0 Iccmax
Current
Integrated
Graphics
(A)
S0 Iccmax
Current
External
Graphics
(A)
S0 Idle
Current
Integrated
Graphics
(A)
S0 Idle
Current
External
Graphics
(A)
Sx
Iccmax
Current
(A)
Sx Idle
Current
(A)
G3
V_CPU_IO 1.1/
1.05 .001 .001 .001 .001
V5REF 5 .001 .001 .001 .001
V5REF_Sus 5 .001 .001 .001 .001 .001
Vcc3_3 3.3 .305 .305 .035 .035
VccADAC 3.3 .075 .0011 .0011 .0011
VccADPLLA 1.05 .1100 .0440 .1034 .022
VccADPLLB 1.05 .1100 .0440 .022 .022
VccCore 1.05 1.76 1.584 .528 .44
VccDMI 1.1 .063 .063 .0011 .0011
VccIO 1.05 3.482 2.862 .9504 .519
VccLAN 1.05 .253 .253 .091 .091 .165
VccME 1.05 1.41 1.41 .493 .493 1.22 .0044
VccME3_3 3.3 .0308 .0308 .0022 .0022 .0154 .0022
VccRTC 3.3 N/A N/A N/A N/A N/A N/A
6 uA
See notes
1, 2
VccSus3_3 3.3 .0924 .0924 .0154 .0154 .1551 .0330
VccSusHDA 3.3 .0088 .0088 .001 .001 .001 .001
VccVRM 1.8 .169 .123 .129 .052
Electrical Characteristics
328 Datasheet
NOTES:
1. G3 state shown to provide an estimate of battery life.
2. Icc (RTC) data is taken with VccRTC at 3.0 V while the system in a mechanical off (G3)
state at room temperature.
Table 8-6. Measured ICC (Mobile Only)
Voltage Rail Voltage
(V)
S0 Iccmax
Current
Integrated
Graphics
(A)
S0 Iccmax
Current
External
Graphics
(A)
S0 Idle
Current
Integrated
Graphics
(A)
S0 Idle
Current
External
Graphics
(A)
Sx
Iccmax
Current
(A)
Sx Idle
Current
(A)
G3
V_CPU_IO 1.1/
1.05 .001 .001 .001 .001
V5REF 5 .001 .001 .001 .001
V5REF_Sus 5 .001 .001 .001 .001 .001
Vcc3_3 3.3 .305 .305 .0176 .0176
VccADAC 3.3 .075 .0011 .0011 .0011
VccADPLLA 1.05 .088 .0176 .0825 .0044
VccADPLLB 1.05 .088 .0176 .0044 .0044
VccCore 1.05 1.43 1.254 .3685 .2805
VccDMI 1.1 .055 .055 .0011 .0011
VccIO 1.05 3.23 2.628 .463 .285
VccLAN 1.05 .220 .220 .066 .066 .132
VccME 1.05 1.2 1.2 .186 .186 .98 .0044
VccME3_3 3.3 .031 .031 .0022 .0022 .0154 .0022
VccRTC 3.3 N/A N/A N/A N/A N/A N/A
6 uA
See notes
1, 2
VccSus3_3 3.3 .087 .087 .0132 .0132 .133 .0297
VccSusHDA 3.3 .0088 .0088 .001 .001 .001 .001
VccVRM 1.8 .156 .114 .113 .045
VccALVDS 3.3 .0011 .0011 .0011 .0011
VccTX_LVDS 1.8 .066 .0011 .0198 .0011
Datasheet 329
Electrical Characteristics
NOTES:
1. G3 state shown to provide an estimate of battery life.
2. Icc (RTC) data is taken with VccRTC at 3.0 V while the system in a mechanical off (G3)
state at room temperature.
Table 8-7. Measured ICC (SFF Only)
Voltage Rail Voltage
(V)
S0 Iccmax
Current
Integrated
Graphics
(A)
S0 Iccmax
Current
External
Graphics
(A)
S0 Idle
Current
Integrated
Graphics
(A)
S0 Idle
Current
External
Graphics
(A)
Sx
Iccmax
Current
(A)
Sx Idle
Current
(A)
G3
V_CPU_IO 1.1/
1.05 .001 .001 .001 .001
V5REF 5 .001 .001 .001 .001
V5REF_Sus 5 .001 .001 .001 .001 .001
Vcc3_3 3.3 .305 .305 .0176 .0176
VccADAC 3.3 .075 .0011 .0011 .0011
VccADPLLA 1.05 .078 .011 .081 .0044
VccADPLLB 1.05 .078 .011 .0044 .0044
VccCore 1.05 1.32 1.14 .352 .264
VccDMI 1.1 .055 .055 .0011 .0011
VccIO 1.05 3.15 2.56 .437 .252
VccLAN 1.05 .176 .176 .057 .057 .11
VccME 1.05 .892 .892 .169 .169 .826 .0044
VccME3_3 3.3 .031 .031 .0022 .0022 .0154 .0022
VccpNAND 1.8 .0055 .0055 .0022 .0022
VccRTC 3.3 N/A N/A N/A N/A N/A N/A
6 uA
See notes
1, 2
VccSus3_3 3.3 .087 .087 .0132 .0132 .122 .0286
VccSusHDA 3.3 .0088 .0088 .001 .001 .001 .001
VccVRM 1.8 .156 .114 .113 .045
VccALVDS 3.3 .0011 .0011 .0011 .0011
VccTX_LVDS 1.8 .066 .0011 .0198 .0011
Electrical Characteristics
330 Datasheet
Table 8-8. DC Characteristic Input Signal Association (Sheet 1 of 2)
Symbol Associated Signals
VIH1/VIL1
(5V Tolerant)
PCI Signals: AD[31:0], C/BE[3:0]#, DEVSEL#, FRAME#, IRDY#, PAR,
PERR#, PLOCK#, REQ[3:0]#, SERR#, STOP#, TRDY#
Interrupt Signals: PIRQ[D:A]#, PIRQ[H:E]#, SERIRQ
GPIO Signals: GPIO[54, 52, 50, 5:2]
VIH2/VIL2 Digital Display Port Hot Plug Detect: DDPB_HPD, DDPC_HPD,
DDPD_HPD
VIH3/VIL3
Clock Signals: REFCLK14IN
Power Management Signals: PWRBTN#, RI#, SYS_RESET#, WAKE#,
CLKRUN# (Mobile Only)
Mobile Only: AC_PRESENT
GPIO Signals: GPIO[67:61, 57, 48, 39, 38, 34, 32, 31, 30, 29, 24, 22,
17, 7, 6, 1]
Intel® Quiet System Technology Signals: TACH[3:0]
Strap Signals:, SATALED# (Strap purposes only)
VIH4/VIL4
Clock Signals: CLKIN_PCILOOPBACK
Processor Signals:A20GATE
PCI Signals: PME#
Interrupt Signals: SERIRQ
Integrated Clock Signals: PEG_A_CLKRQ#, PEG_B_CLKRQ#,
PCIECLKRQ[7:0]#
Power Management Signals: BATLOW#
SATA Signals: SATA[5:0]GP
SPI Signals: SPI_MISO
Strap Signals: SPKR, SPI_MOSI, GNT[3:0]#, (Strap purposes only)
LPC/Firmware Hub Signals: LAD[3:0]/FWH[3:0], LDRQ0#, LDRQ1#,
GPIO Signals: GPIO[73, 72, 59, 56, 55, 53, 51, 49, 47:40, 37, 36, 35,
33, 28, 27, 26, 25, 23,21, 20, 19, 18, 16, 15, 14, 12, 10, 9, 8, 0]
Desktop Only: GPIO[72, 12]
USB Signals: OC[7:0]#
VIH5/VIL5
SMBus Signals: SMBCLK, SMBDATA, SMBALERT#
System Management Signals: SML[1:0]CLK(1), SML[1:0]DATA(1)
GPIO Signals: GPIO[75, 74, 60, 58, 11]
Processor Interface: RCIN#
Power Management Signals: SYS_PWROK, LAN_RST#, MEPWROK
VIH6/VIL6 JTAG Signals: JTAG_TDI, JTAG_TMS, TRST#, JTAG_TCK
VIH7/VIL7 Processor Signals: THRMTRIP#
VIMIN8/VIMAX8 PCI Express* Data RX Signals: PER[p,n][8:1]
VIH9/VIL9 Real Time Clock Signals: RTCX1
VIMIN10 -Gen1i/
VIMAX10-Gen1i SATA Signals: SATA[5:0]RX[P,N] (1.5 Gb/s internal SATA)
VIMIN10 -Gen1m/
VIMAX10-Gen1m SATA Signals: SATA[5:0]RX[P,N] (1.5 Gb/s external SATA)
VIMIN10 -Gen2i/
VIMAX10-Gen2i SATA Signals: SATA[5:0]RX[P,N] (3.0 Gb/s internal SATA)
VIMIN10 -Gen2m/
VIMAX10-Gen2m SATA Signals: SATA[5:0]RX[P,N] (3.0 Gb/s external SATA)
Datasheet 331
Electrical Characteristics
NOTES:
1. VDI = | USBPx[P] – USBPx[N].
2. Includes VDI range.
3. Applies to Low-Speed/High-Speed USB.
4. PCI Express mVdiff p-p = 2*|PETp[x] – PETn[x]|.
5. SATA Vdiff, RX (VIMAX10/MIN10) is measured at the SATA connector on the receiver side
(generally, the motherboard connector), where
SATA mVdiff p-p = 2*|SATA[x]RXP – SATA[x]RXN|.
6. VccRTC is the voltage applied to the VccRTC well of the PCH. When the system is in a G3
state, this is generally supplied by the coin cell battery, but for S5 and greater, this is
generally VccSus3_3.
7. CL_Vref = 0.27 CL_VREF1 applies to Mobile configurations.
8. This is an AC characteristic that represents transient values for these signals.
9. Applies to High-Speed USB 2.0.
VIH11/VIL11
Intel High Definition Audio Signals: HDA_SDIN[3:0] (3.3V Mode)
Strap Signals: HDA_SDOUT, HDA_SYNC (Strap purposes only)
GPIO Signals: GPIO13
NOTE: See VIL_HDA/VIH_HDA for High Definition Audio Low Voltage Mode
VIH12 (Absolute
Maximum) / VIL12
(Absolute
Minimum) /
Vclk_in_cross(abs)
Clock Signals: CLKIN_BCLK_[P,N], CLKIN_DMI_[P,N],
CLKIN_DOT96[P,N], CLKIN_SATA_[P,N] / CKSSCD_[P,N]
VIH13/VIL13 Miscellaneous Signals: RTCRST#
VIH14/VIL14
Power Management Signals: PWROK, RSMRST#
System Management Signals: INTRUDER#
Miscellaneous Signals: INTVRMEN, SRTCRST#
VIH15/VIL15
Digital Display Control Signals: CRT_DDC_CLK, CRT_DDC_DATA
SDVO_CTRLCLK, SDVO_CTRLDATA, DDPC_CTRLCLK, DDPC_CTRLDATA,
DDPD_CTRLCLK, DDPD_CTRLDATA
Mobile only: L_BKLTEN, L_BKLTCTL, L_DDC_CLK, L_DDC_DATA
VIH_CL/VIL_CL Controller Link: CL_CLK1, CL_DATA1
VDI / VCM / VSE
(5V Tolerant) USB Signals: USBP[13:0][P,N] (Low-speed and Full-speed)
VHSSQ / VHSDSC /
VHSCM
(5V Tolerant)
USB Signals: USBP[13:0][P,N] (in High-speed Mode)
VIH_HDA /
VIL_HDA
Intel® High Definition Audio Signals: HDA_SDIN[3:0]
Strap Signals: HDA_SDOUT, HDA_SYNC (Strap purposes only)
NOTE: Only applies when running in Low Voltage Mode (1.5 V)
VIH_SST/VIL_SST Intel® Quiet System Technology and Thermal Reporting Signals:
SST
VIH_PECI/
VIL_PECI
Intel® Quiet System Technology and Thermal Reporting Signals:
PECI
VIH_FDI/VIL_FDI Intel® Flexible Display Interface Signals: FDI_RX[P,N][7:0]
VAUX-Diff-P-P Digital Display Port Aux Signal (Receiving Side): DDP[D:B]_AUX[P,N]
VIH_XTAL25/
VIL_XTAL25
25 MHz Crystal Input: (Used in Display Clock Integration Mode)
XTAL25_IN
Table 8-8. DC Characteristic Input Signal Association (Sheet 2 of 2)
Symbol Associated Signals
Electrical Characteristics
332 Datasheet
Table 8-9. DC Input Characteristics (Sheet 1 of 3)
Symbol Parameter Min Max Unit Notes
VIL1 Input Low Voltage –0.5 0.3(3.3V) V Note 10
VIH1 Input High Voltage 0.5(3.3V) V5REF + 0.5 V Note 10
VIL2 Input Low Voltage .8 V
VIH2 Input High Voltage 2 V
VIL3 Input Low Voltage –0.5 0.8 V
VIH3 Input High Voltage 2.0 3.3 V + 0.5 V Note 10
VIL4 Input Low Voltage –0.5 0.3(3.3 V) V Note 10
VIH4 Input High Voltage 0.5(3.3 V) 3.3 V + 0.5 V Note 10
VIL5 Input Low Voltage –0.5 0.8 V
VIH5 Input High Voltage 2.1 3.3 V + 0.5 V Note 10
VIL6 Input Low Voltage -0.5 0.35 V Note 11
VIH6 Input High Voltage 0.75 1.05 V + 0.5 V Note 11
VIL7 Input Low Voltage 0 0.51(V_CPU_IO) V
VIH7 Input High Voltage 0.81(V_CPU_IO) V_CPU_IO V
VIMIN8 Minimum Input Voltage 175 mVdiff
p-p Note 4
VIMAX8 Maximum Input Voltage 1200 mVdiff
p-p Note 4
VIL9 Input Low Voltage –0.5 0.10 V
VIH9 Input High Voltage 0.50 1.2 V
VIMIN10-
Gen1i
Minimum Input Voltage - 1.5
Gb/s internal SATA 325 mVdiff
p-p Note 5
VIMAX10-
Gen1i
Maximum Input Voltage - 1.5
Gb/s internal SATA —600
mVdiff
p-p Note 5
VIMIN10-
Gen1m
Minimum Input Voltage - 1.5
Gb/s eSATA 240 mVdiff
p-p Note 5
VIMAX10-
Gen1m
Maximum Input Voltage - 1.5
Gb/s eSATA —600
mVdiff
p-p Note 5
VIMIN10-
Gen2i
Minimum Input Voltage - 3.0
Gb/s internal SATA 275 mVdiff
p-p Note 5
VIMAX10-
Gen2i
Maximum Input Voltage - 3.0
Gb/s internal SATA —750
mVdiff
p-p Note 5
VIMIN10-
Gen2m
Minimum Input Voltage - 3.0
Gb/s eSATA 240 mVdiff
p-p Note 5
VIMAX10-
Gen2m
Maximum Input Voltage - 3.0
Gb/s eSATA —750
mVdiff
p-p Note 5
VIL11 Input Low Voltage 0.5 0.35(3.3 V) V Note 10
Datasheet 333
Electrical Characteristics
VIH11 Input High Voltage 0.65(3.3 V) 3.3 + 0.5V V Note 10
VIL12
(Absolute
Minimum)
Input Low Voltage -0.3 V
VIH12
(Absolute
Maximum)
Input High Voltage 1.150 V
VIL13 Input Low Voltage 0.5 0.78 V
VIH13 Input High Voltage 2.3 VccRTC + 0.5 V Note 6
VIL14 Input Low Voltage 0.5 0.78 V
VIH14 Input High Voltage 2.0 VccRTC + 0.5 V Note 6
VIL15 Input Low Voltage 0.5 0.3*(3.3 V) V Note 10
VIH15 Input High Voltage 0.7*(3.3 V) 3.3 V + 0.5 V Note 10
VIL_CL Input Low Voltage 0.3 (CL_VREF - 0.075) V Note 7
VIH_CL Input High Voltage (CL_VREF + 0.075) 1.2 V Note 7
Vclk_in_cros
s(abs) Absolute Crossing Point 0.250 0.550 V
VDI Differential Input Sensitivity 0.2 V Note 1,3
VCM Differential Common Mode
Range 0.8 2.5 V Note 2,3
VSE Single-Ended Receiver
Threshold 0.8 2.0 V Note 3
VHSSQ HS Squelch Detection
Threshold 100 150 mV Note 9
VHSDSC HS Disconnect Detection
Threshold 525 625 mV Note 9
VHSCM HS Data Signaling Common
Mode Voltage Range –50 500 mV Note 9
VIL_HDA Input Low Voltage 0 0.4(Vcc_HDA) V
VIH_HDA Input High Voltage 0.6(Vcc_HDA) 1.5 V
VIL_SST Input Low Voltage -0.3 0.4 V
VIH_SST Input High Voltage 1.1 1.5 V
VIL_PECI Input Low Voltage -0.15 0.275(V_CPU_IO) V
VIH_PECI Input High Voltage 0.725(V_CPU_IO) V_CPU_IO + 0.15 V
VIL_FDI Minimum Input Voltage 175 mVdiff
p-p
VIH_FDI Maximum Input Voltage 1000 mVdiff
p-p
Table 8-9. DC Input Characteristics (Sheet 2 of 3)
Symbol Parameter Min Max Unit Notes
Electrical Characteristics
334 Datasheet
NOTES:
1. VDI = | USBPx[P] – USBPx[N].
2. Includes VDI range.
3. Applies to Low-Speed/Full-Speed USB.
4. PCI Express mVdiff p-p = 2*|PETp[x] - PETn[x]|.
5. SATA Vdiff, RX (VIMAX10/MIN10) is measured at the SATA connector on the receiver side
(generally, the motherboard connector), where
SATA mVdiff p-p = 2*|SATA[x]RXP – SATA[x]RXN|.
6. VccRTC is the voltage applied to the VccRTC well of the PCH. When the system is in a G3
state, this is generally supplied by the coin cell battery, but for S5 and greater, this is
generally VccSus3_3.
7. CL_Vref = 0.27 (VccCL1_5). CL_VREF0 applies to Desktop configurations.
CL_VREF1 applies to Mobile configurations.
8. This is an AC Characteristic that represents transient values for these signals.
9. Applies to High-Speed USB 2.0.
10. 3.3 V refers to VccSus3_3 for signals in the suspend well and to Vcc3_3 for signals in the
core well and to VccME3_3 for signals in the ME well. See Tab le 3- 2, or Tab l e 3 - 3 for signal
and power well association.
11. 1.1 V refers to VccIO or VccCore for signals in the core well and to VccME for signals in the
ME well. See Tab l e 3 -2 or Tab l e 3- 3 for signal and power well association.
12. Specification applies when 25 MHz crystal is used on the platform.
XTAL25_IN is terminated low when crystal input is not used.
VAUX-Diff-P-
P
Digital Display Port Auxiliary
Signal peak-to-peak voltage at
receiving device
0.32 1.36 Vdiffp
-p
VIL_XTAL25 Minimum Input Voltage -0.15 0.15 V 12
VIH_XTAL25 Maximum Input Voltage 0.7 1.1 V 12
Table 8-9. DC Input Characteristics (Sheet 3 of 3)
Symbol Parameter Min Max Unit Notes
Table 8-10. DC Characteristic Output Signal Association (Sheet 1 of 3)
Symbol Associated Signals
VOH1/VOL1 Processor Signal: PMSYNCH, PROCPWRGD
VOH2/VOL2
LPC/Firmware Hub Signals: LAD[3:0]/FWH[3:0], LFRAME#/FWH[4],
INIT3_3V#
Power Management Signal: (Mobile Only) LAN_PHY_PWR_CTRL
Intel® High Definition Audio Signals: HDA_DOCK_EN# (Mobile Only),
HDA_DOCK_RST# (Mobile Only)
PCI Signals: AD[31:0], C/BE[3:0], DEVSEL#, FRAME#, IRDY#, PAR,
PCIRST#, GNT[3:0]#, PME#(1)
Interrupt Signals: PIRQ[D:A], PIRQ[H:E]#(1)
GPIO Signals: GPIO[73, 72, 59, 56, 55:50, 49, 47:44 43:40, 37, 36, 35,
33, 28, 27, 26, 25, 23, 21, 20, 19, 18, 16, 15, 14, 13, 12, 10, 9, 8, 5:2, 0]
SPI Signals: SPI_CS0#, SPI_CS1#, SPI_MOSI, SPI_CLK
Miscellaneous Signals: SPKR
VOH3/VOL3
SMBus Signals: SMBCLK(1), SMBDATA(1)
System Management Signals: SML[1:0]CLK(1), SML[1:0]DATA(1),
SML0ALERT#, SML1ALERT#
GPIO Signals: GPIO[75, 74, 60, 58, 11]
Datasheet 335
Electrical Characteristics
VOH4/VOL4
Power Management Signals: SLP_S3#, SLP_S4#, SLP_S5#, SLP_M#,
SLP_LAN#, SUSCLK, SUS_STAT#, SUS_PWR_DN_ACK, CLKRUN# (Mobile
Only) STP_PCI#
SATA Signals: SATALED#, SCLOCK, SLOAD, SDATAOUT0, SDATAOUT1
GPIO Signals: GPIO[63:61, 57, 48, 39, 38, 34, 32, 31, 30, 29, 24, 22, 17,
7, 6, 1]
Controller Link: CL_RST1#
Interrupt Signals: SERIRQ
VOH5/VOL5 USB Signals: USBP[13:0][P,N] in Low-speed and Full-speed Modes
VOL6/VOL6 (Fast
Mode)
Digital Display Control Signals: CRT_DDC_CLK, CRT_DDC_DATA
SDVO_CTRLCLK, SDVO_CTRLDATA, DDPC_CTRLCLK, DDPC_CTRLDATA,
DDPD_CTRLCLK, DDPD_CTRLDATA
Mobile only: L_CTRL_CLK, L_CTRL_DATA, L_VDD_EN, L_BKLTEN,
L_BKLTCTL, L_DDC_CLK, L_DDC_DATA,
NOTE: Fast Mode is not applicable to L_VDD_EN
VOH6 L_VDD_EN, L_BKLTEN, L_BKLTCTL
VOMIN7 -
Gen1i,m/
VOMAX7-Gen1i,m
SATA Signals: SATA[5:0]RX[P,N] (1.5 Gb/s Internal and External SATA)
VOMIN7 -
Gen2i,m/
VOMAX7-Gen2i,m
SATA Signals: SATA[5:0]RX[P,N] (3.0 Gb/s Internal and External SATA)
VOMIN8/VOMAX8
PCI Express* Data TX Signals: PET[p,n][8:1]
Digital Display Ports when configured as HDMI/DVI:
DDPB_[3:0][P,N], DDPC_[3:0][P,N], DDPD_[3:0][P,N]
SDVO Signals: SDVO_INT[P,N], SDVO_TVCLKIN[P,N], SDVO_STALL[P,N]
VOH9/VOL9 Power Management Signal: PLTRST#
VHSOI
VHSOH
VHSOL
VCHIRPJ
VCHIRPK
USB Signals: USBP[13:0][P:N] in High-speed Mode
VOH_HDA/
VOL_HDA
Intel® High Definition Audio Signals: HDA_RST#, HDA_SDOUT,
HDA_SYNC
VOL_JTAG JTAG Signals: JTAG_TDO
VOH_PCICLK/
VOL_PCICLK
Single Ended Clock Interface Output Signals: CLKOUT_PCI[4:0],
CLKOUTFLEX[3:0]
GPIO Signals: [67:64]
VOL_SGPIO
SGPIO Signals: SCLOCK, SLOAD, SDATAOUT0, SDATAOUT1
GPIO[48, 39, 38, 22]
VOH_PWM/
VOL_PWM Intel® Quiet System Technology Signals: PWM[3:0]
Table 8-10. DC Characteristic Output Signal Association (Sheet 2 of 3)
Symbol Associated Signals
Electrical Characteristics
336 Datasheet
NOTE:
1. These signals are open-drain.
VOH_CRT/
VOL_CRT Display Signals: CRT_HSYNC, CRT_VSYNC
VOH_CL1/
VOL_CL1 Controller Link Signals: Mobile Only: CL_CLK1, CL_DATA1
VOH_SST/
VOL_SST SST signal: SST
VOH_PECI/
VOL_PECI PECI signal: PECI
VAUX-Diff-P-P Digital Display Port Aux Signal (Transmit Side): DDP[D:B]_AUX[P,N]
VOH_FDI//
VOL_FDI Intel® FDI signals:FDI_FSYNC_[1:0],FDI_LSYNC_[1:0],FDI_INT
Table 8-10. DC Characteristic Output Signal Association (Sheet 3 of 3)
Symbol Associated Signals
Datasheet 337
Electrical Characteristics
Table 8-11. DC Output Characteristics (Sheet 1 of 2)
Symbol Parameter Min Max Unit IOL / IOH Notes
VOL1 Output Low Voltage 0.255 V 3 mA
VOH1 Output High Voltage V_CPU_IO - 0.3 V_CPU_IO V -3 mA
VOL2 Output Low Voltage 0.1(3.3 V) V 1.5 mA Note 7
VOH2 Output High Voltage 0.9(3.3 V) 3.3 V -0.5 mA Note 7
VOL3 Output Low Voltage 0 0.4 V 4 mA
VOH3 Output High Voltage 3.3 V - 0.5 V -2 mA Note 1, 7
VOL4 Output Low Voltage 0.4 V 6 mA
VOH4 Output High Voltage 3.3 V- 0.5 3.3 V V -2 mA Note 7
VOL5 Output Low Voltage 0.4 V 5 mA
VOH5 Output High Voltage 3.3 V – 0.5 V -2 mA Note 7
VOL6 Output Low Voltage 0 400 mV 3 mA Note 2
VOL6 (Fast
Mode) Output Low Voltage 0 600 mV 6 mA Note 2
VOH6 Output High Voltage 3.3 V – 0.5 3.3 V -2 mA Note 7, 2
VOMIN7-
Gen1i,m
Minimum Output
Voltage 400 mVdif
fp-p Note 3
VOMAX7-
Gen1i,m
Maximum Output
Voltage —600
mVdif
fp-p Note 3
VOMIN7-
Gen2i,m
Minimum Output
Voltage 400 mVdif
fp-p Note 3
VOMAX7-
Gen2i,m
Maximum Output
Voltage —700
mVdif
fp-p Note 3
VOMIN8 Output Low Voltage 400 mVdif
fp-p Note 2
VOMAX8 Output High Voltage 600 mVdif
fp-p Note 2
VOL9 Output Low Voltage 0.1(3.3 V) V 1.5 mA Note 7
VOH9 Output High Voltage 0.9(3.3 V) 3.3 V -2.0 mA Note 7
VHSOI HS Idle Level –10.0 10.0 mV
VHSOH HS Data Signaling
High 360 440 mV
VHSOL HS Data Signaling
Low –10.0 10.0 mV
VCHIRPJ Chirp J Level 700 1100 mV
VCHIRPK Chirp K Level –900 –500 mV
VOL_HDA Output Low Voltage 0.1(VccSusHDA V) V 1.5 mA
VOH_HDA Output High Voltage 0.9(VccSusHDA V) V -0.5 mA
VOL_PWM Output Low Voltage 0.4 V 8 mA
VOH_PWM Output High Voltage Note 1
VOL_SGPIO Output Low Voltage 0.4 V
VOL_CRT Output Low Voltage 0.5 V 8 mA
VOH_CRT Output High Voltage 2.4 V 8 mA
VOL_CL1 Output Low Voltage 0.15 V 1 mA
Electrical Characteristics
338 Datasheet
NOTES:
1. The SERR#, PIRQ[H:A], SMBDATA, SMBCLK, SML[1:0]CLK, SML[1:0]DATA,
SML[1:0]’ALERT# and PWM[3:0] signal has an open-drain driver and SATALED# has an
open-collector driver, and the VOH / IOH specification does not apply. This signal must have
external pull up resistor.
2. PCI Express mVdiff p-p = 2*|PETp[x] – PETn[x]|.
3. SATA Vdiff, tx (VOMIN7/VOMAX7) is measured at the SATA connector on the transmit side
(generally, the motherboard connector), where
SATA mVdiff p-p = 2*|SATA[x]TXP – SATA[x]TXN|.
4. Maximum Iol for PROCPWRGD is 12mA for short durations (<500 mS per 1.5 s) and 9 mA
for long durations.
5. For INIT3_3V only, for low current devices, the following applies: VOL5 Max is 0.15 V at an
IOL5 of 2 mA.
6. 3.3 V refers to VccSus3_3 for signals in the suspend well, to Vcc3_3 for signals in the core
well and to VccME3_3 for those signals in the ME well. See Tab l e 3- 2 or Tab le 3 -3 for signal
and power well association.
7. 3.3 V refers to VccSus3_3 for signals in the suspend well and to Vcc3_3 for signals in the
core well and to VccME3_3 for signals in the ME well. See Tab le 3- 2, or Tab l e 3 - 3 for signal
and power well association.
VOH_CL1 Output High Voltage .61 .98 V
VOL_SST Output Low Voltage 0 0.3 V 0.5 mA
VOH_SST Output High Voltage 1.1 1.5 V -6 mA
VOL_PECI Output Low Voltage 0.25(V_CPU_IO) V 0.5 mA
VOH_PECI Output High Voltage 0.75(V_CPU_IO) V_CPU_IO -6 mA
VOL_HDA Output Low Voltage 0.1(VccHDA) V 1.5 mA
VOL_JTAG Output Low Voltage 0 0.1(1.05 V) V 1.5 mA
V_CLKOUT_sw
ing
Differential Output
Swing 300 mV
V_CLKOUT_cr
oss
Clock Cross-Over
point 300 550 mV
V_CLKOUTMIN Min output Voltage -0.3 V
V_CLKOUTMA
XMax output Voltage 1.15 V V
VOL_PCICLK Output Low Voltage 0.4 V -1 mA
VOH_PCICLK Output High Voltage 2.4 V 1 mA
VAUX-Diff-P-P
Digital Display Port
Auxiliary Signal
peak-to-peak voltage
at transmitting
device
0.39 1.38 Vdiffp
-p
VOL_FDI Output Low Voltage -.1 0.2(3.3V) V 4.1 mA Note 7
VOH_FDI Output High Voltage .8(3.3V) 1.2 V 4.1 mA Note 7
Table 8-11. DC Output Characteristics (Sheet 2 of 2)
Symbol Parameter Min Max Unit IOL / IOH Notes
Datasheet 339
Electrical Characteristics
NOTES:
1. The I/O buffer supply voltage is measured at the PCH package pins. The tolerances shown
in Table 8-12 are inclusive of all noise from DC up to 20 MHz. In testing, the voltage rails
should be measured with a bandwidth limited oscilloscope that has a rolloff of 3 dB/decade
above 20 MHz.
2. Includes Single Ended clocks REFCLK14IN, CLKOUTFLEX[3:0] and PCICLKIN.
Table 8-12. Other DC Characteristics
Symbol Parameter Min Nom Max Unit Notes
V_CPU_IO Processor I/F .998 1.05 1.10 V 1
V_CPU_IO Processor I/F 1.05 1.1 1.16 V 1
V5REF PCH Core Well Reference Voltage 4.75 5 5.25 V 1
Vcc3_3 I/O Buffer Voltage 3.14 3.3 3.47 V 1
VccVRM 1.8 V Internal PLL and VRMs (1.8 V for
Desktop and Mobile) 1.746 1.8 1.854 V 1,3
V5REF_Sus Suspend Well Reference Voltage 4.75 5 5.25 V 1
VccSus3_3 Suspend Well I/O Buffer Voltage 3.14 3.3 3.47 V 1
VccCore Internal Logic Voltage .998 1.05 1.10 V 1
VccIO Core Well I/O buffers .998 1.05 1.10 V 1
Vcc_DMI DMI Buffer Voltage .998 1.05 1.10 V
VccLAN LAN Controller Voltage .998 1.05 1.10 V 1
VccME3_3 3.3V Supply for Intel® Management
Engine 3.14 3.3 3.47 V 1
VccME 1.05 V Supply for Intel® Management
Engine .998 1.05 1.10 V 1
VccRTC (G3-S0) Battery Voltage 2 3.47 V 1
VccSusHDA High Definition Audio Controller Suspend
Voltage 3.14 3.3 3.47 V 1
VccSusHDA (low
voltage)
High Definition Audio Controller Low
Voltage Mode Suspend Voltage 1.43 1.5 1.58 V 1
VccADPLLA Display PLL A power .998 1.05 1.10 1
VccADPLLB Display PLL B power .998 1.05 1.10 1
VccADAC Display DAC Analog Power. This power is
supplied by the core well. 3.14 3.3 3.47 1
VccALVDS Analog power supply for LVDS (Mobile
Only) 3.14 3.3 3.47 1
VccTX_LVDS I/O power supply for LVDS. (Mobile Only) 1.71 1.8 1.89 1
ILI1 PCI_3V Hi-Z State Data Line Leakage –10 10 µA (0 V < VIN
< Vcc3_3)
ILI2 PCI_5V Hi-Z State Data Line Leakage –70 70 µA
Max VIN =
2.7 V Min
VIN = 0.5 V
ILI3 Input Leakage Current – All Other –10 10 µA 2
CIN Input Capacitance – All Other TBD pF FC = 1 MHz
COUT Output Capacitance TBD pF FC = 1 MHz
CI/O I/O Capacitance 10 pF FC = 1 MHz
Typical Value
CLXTAL1 6 pF
CLXTAL2 6 pF
Electrical Characteristics
340 Datasheet
3. Includes only DC tolerance. AC tolerance will be 2% and DC tolerance will be 3% in
addition to this range.
8.5 Display DC Characteristics
NOTES:
1. Measured at each R, G, B termination according to the VESA Test Procedure – Evaluation of
Analog Display Graphics Subsystems Proposal (Version 1, Draft 4, December 1, 2000).
2. Max steady-state amplitude.
3. Min steady-state amplitude.
4. Defined for a double 75- ohm termination.
5. Set by external reference resistor value.
6. INL and DNL measured and calculated according to VESA video signal standards.
7. Max full-scale voltage difference among R,G,B outputs (percentage of steady-state full-
scale voltage).
Table 8-13. Signal Groups
Signal Group Associated Signals Note
LVDS
LVDSA_DATA[3:0], LVDSA_DATA#[3:0], LVDSA_CLK,
LVDSA_CLK#, LVDSB_DATA[3:0], LVDSB_DATA#[3:0],
LVDSB_CLK, LVDSB_CLK#
CRT DAC CRT_RED, CRT_GREEN, CRT_BLUE, CRT_IRTN, CRT_TVO_IREF
Digital DisplayPort
Auxillary DDP[D:B]_AUX[P,N]
Table 8-14. CRT DAC Signal Group DC Characteristics: Functional Operating Range
(VccADAC = 3.3 V ±5%)
Parameter Min Nom Max Unit Notes
DAC Resolution —8Bits 1
Max Luminance (full-scale) 0.665 0.7 0.77 V 1, 2, 4 white video level voltage
Min Luminance 0 V 1, 3, 4 black video level voltage
LSB Current —73.2—uA 4, 5
Integral Linearity (INL) -1 1 LSB 1, 6
Differential Linearity (DNL) -1 1 LSB 1, 6
Video channel-channel voltage ampli-
tude mismatch —— 6% 7
Monotonicity Yes
Datasheet 341
Electrical Characteristics
Table 8-15. LVDS Interface: Functional Operating Range (VccALVDS = 3.3 V ±5%)
Symbol Parameter Min Nom Max Unit
VOD Differential Output Voltage 250 350 450 mV
ΔVOD Change in VOD between Complementary
Output States ——50mV
VOS Offset Voltage 1.125 1.25 1.375 V
ΔVOS Change in VOS between Complementary
Output States ——50mV
IOs Output Short Circuit Current —-3.5-10mA
IOZ Output TRI-STATE Current —±1 ±10 uA
Table 8-16. Display Port Auxiliary Signal Group DC Characteristics
Symbol Parameter Min Nom Max Unit
Vaux-diff-p-p Aux peak-to-peak voltage at a transmitting
devices 0.39 1.38 V
Aux peak-to-peak voltage at a receiving devices 0.32 1.36 V
Vaux-term-R AUX CH termination DC resistance —100 Ω
V-aux-dc-cm AUX DC common mode voltage 0— 2 V
V-aux_turn-
CM
Aux turn around common mode voltage —0.4 V
Electrical Characteristics
342 Datasheet
8.6 AC Characteristics
NOTES:
1. Specified at the measurement point into a timing and voltage compliance test load and
measured over any 250 consecutive TX UIs. (Also refer to the Transmitter compliance eye
diagram).
2. A TTX-EYE = 0.70 UI provides for a total sum of deterministic and random jitter budget of
TTXJITTER-MAX = 0.30 UI for the Transmitter collected over any 250 consecutive TX UIs. The
TTXEYE-MEDIAN-to-MAX-JITTER specification ensures a jitter distribution in which the median
and the maximum deviation from the median is less than half of the total TX jitter budget
collected over any 250 consecutive TX UIs. It should be noted that the median is not the
same as the mean. The jitter median describes the point in time where the number of jitter
points on either side is approximately equal as opposed to the averaged time value.
3. Specified at the measurement point and measured over any 250 consecutive UIs. The test
load documented in the PCI Express* specification 2.0 should be used as the RX device
when taking measurements (also refer to the Receiver compliance eye diagram). If the
clocks to the RX and TX are not derived from the same reference clock, the TX UI
recovered from 3500 consecutive UI must be used as a reference for the eye diagram.
4. A TRX-EYE = 0.40 UI provides for a total sum of 0.60 UI deterministic and random jitter
budget for the Transmitter and interconnect collected any 250 consecutive UIs. The TRX-
EYE-MEDIAN-to--MAX-JITTER specification ensures a jitter distribution in which the median and
the maximum deviation from the median is less than half of the total 0.6 UI jitter budget
collected over any 250 consecutive TX UIs. It should be noted that the median is not the
same as the mean. The jitter median describes the point in time where the number of jitter
points on either side is approximately equal as opposed to the averaged time value. If the
clocks to the RX and TX are not derived from the same reference clock, the TX UI
recovered from 3500 consecutive UI must be used as the reference for the eye diagram.
5. Nominal Unit Interval is 400 ps for 2.5 GT/s and 200 ps for 5 GT/s.
Table 8-17. PCI Express* Interface Timings
Symbol Parameter Min Max Unit Figures Notes
Transmitter and Receiver Timings
UI Unit Interval – PCI Express* 399.88 400.12 ps 5
TTX-EYE
Minimum Transmission Eye
Width 0.7 UI 8-26 1,2
TTX-RISE/
Fall
D+/D- TX Out put Rise/Fall
time 0.125 UI 1,2
TRX-EYE Minimum Receiver Eye Width 0.40 UI 8-27 3,4
Datasheet 343
Electrical Characteristics
NOTES:
1. Specified at the measurement point into a timing and voltage compliance test load and
measured over any 250 consecutive TX UIs. (Also refer to the Transmitter compliance eye
diagram).
2. A TTX-EYE = 0.70 UI provides for a total sum of deterministic and random jitter budget of
TTXJITTER-MAX = 0.30 UI for the Transmitter collected over any 250 consecutive TX UIs. The
TTXEYE-MEDIAN-to-MAX-JITTER specification ensures a jitter distribution in which the median
and the maximum deviation from the median is less than half of the total TX jitter budget
collected over any 250 consecutive TX UIs. It should be noted that the median is not the
same as the mean. The jitter median describes the point in time where the number of jitter
points on either side is approximately equal as opposed to the averaged time value.
NOTES:
1. Specified at the measurement point into a timing and voltage compliance test load and
measured over any 250 consecutive TX UIs. (Also refer to the Transmitter compliance eye
diagram).
2. A TTX-EYE = 0.70 UI provides for a total sum of deterministic and random jitter budget of
TTXJITTER-MAX = 0.30 UI for the Transmitter collected over any 250 consecutive TX UIs. The
TTXEYE-MEDIAN-to-MAX-JITTER specification ensures a jitter distribution in which the median
and the maximum deviation from the median is less than half of the total TX jitter budget
collected over any 250 consecutive TX UIs. It should be noted that the median is not the
same as the mean. The jitter median describes the point in time where the number of jitter
points on either side is approximately equal as opposed to the averaged time value.
3. Specified at the measurement point and measured over any 250 consecutive UIs. The test
load documented in the PCI Express* specification 2.0 should be used as the RX device
Table 8-18. HDMI Interface Timings (DDP[D:B][3:0])
Symbol Parameter Min Max Unit Figures Notes
Transmitter and Receiver Timings
UI Unit Interval 600 4000 ps
TTX-EYE
Minimum Transmission Eye
Width 0.8 UI 1,2
TTX-RISE/Fall
D+/D- TX Out put Rise/Fall
time 0.125 UI 1,2
TMDS
Clock Jitter —0.25UI
T-skew-
intra-pair
Intra pair skew at source
connector —0.15T
BIT
T-skew-
inter-pair
Inter pair skew at source
connector —0.2
Tch ar
acter
Duty Cycle Clock Duty Cycle 10 60% %
Table 8-19. SDVO Interface Timings
Symbol Parameter Min Max Unit Figures Notes
Transmitter and Receiver Timings
UI Unit Interval 369.89 1000 ps 5
TTX-EYE
Minimum Transmission Eye
Width 0.7 UI 8-26 1,2
TTX-RISE/
Fall
D+/D- TX Out put Rise/Fall
time —0.125UI 1,2
TRX-EYE Minimum Receiver Eye Width 0.40 UI 8-27 3,4
Electrical Characteristics
344 Datasheet
when taking measurements (also refer to the Receiver compliance eye diagram). If the
clocks to the RX and TX are not derived from the same reference clock, the TX UI
recovered from 3500 consecutive UI must be used as a reference for the eye diagram.
4. A TRX-EYE = 0.40 UI provides for a total sum of 0.60 UI deterministic and random jitter
budget for the Transmitter and interconnect collected any 250 consecutive UIs. The TRX-
EYE-MEDIAN-to--MAX-JITTER specification ensures a jitter distribution in which the median and
the maximum deviation from the median is less than half of the total 0.6 UI jitter budget
collected over any 250 consecutive TX UIs. It should be noted that the median is not the
same as the mean. The jitter median describes the point in time where the number of jitter
points on either side is approximately equal as opposed to the averaged time value. If the
clocks to the RX and TX are not derived from the same reference clock, the TX UI
recovered from 3500 consecutive UI must be used as the reference for the eye diagram.
5. Nominal Unit Interval for highest SDVO speed is 370 ps. However, depending on the
resolution on the interface, the UI may be more than 370 ps.
Table 8-20. DisplayPort Interface Timings (DDP[D:B][3:0])
Symbol Parameter Min Nom Max Unit
UI_High_Rate Unit Interval for High Bit Rate
(2.7 Gbps/lane) 370 ps
UI_Low_Rate Unit Interval for Reduced Bit Rate
(1.62 Gbps/lane) 617 ps
Down_Spread_
Amplitude Link clock down spreading 0 0.5 %
Down_Spread_
Frequency Link clock down-spreading frequency 30 33 kHz
Ltx-skew-
intrapair
Lane Intra-pair output skew at Tx
package pins —20ps
Ttx-rise/
fall_mismatch_
chipdiff
Lane Intra-pair Rise/Fall time
mismatch at Tx package pin 5%
VTX-DIFFp-p-level1 Differential Peak-to-peak Output
Voltage level 1 0.34 0.4 0.46 V
VTX-DIFFp-p-level2
Differential Peak-to-peak Output
Voltage level 2 0.51 0.6 0.68 V
VTX-DIFFp-p-level3
Differential Peak-to-peak Output
Voltage level 3 0.69 0.8 0.92 V
VTX-preemp_ratio No Pre-emphasis 0 0 0 dB
VTX-preemp_ratio 3.5 dB Pre-emphasis Level 2.8 3.5 4.2 dB
VTX-preemp_ratio 6.0 dB Pre-emphasis Level 4.8 6 7.2 dB
LTX-SKEW-
INTER_PAIR
Lane-to-Lane Output Skew at Tx
package pins ——2UI
Datasheet 345
Electrical Characteristics
NOTES:
1. Measurement Point for Rise and Fall time: VIL(min)–VIL(max).
2. Cb = total capacitance of one bus line in pF. If mixed with High-speed mode devices, faster
fall times according to High-Speed mode Tr/Tf are allowed.
Table 8-21. DisplayPort Aux Interface
Symbol Parameter Min Nom Max Unit
UI Aux unit interval 0.4 0.5 0.6 us
T-
Aux_bus_park AUX CH bus park time 10 ns
Tcycle-to-cycle
jitter
maximum allowable UI variation within
a single transaction at the connector
pins of a transmitting device
0.04 UI
maximum allowable UI variation within
a single transaction at the connector
pins of a receiving device
0.05 UI
Table 8-22. DDC Characteristics
DDC Signals: CRT_DDC_CLK, CRT_DDC_DATA, L_DDC_CLK, L_DDC_DATA, SDVO_CTRLCLK,
SDVO_CTRLDATA, DDP[D:C]_CTRLCLK, DDP[D:C]_CTRLDATA
Symbol Parameter
Standard
Mode Fast Mode 1 MHz
Units
Max Min Max Min Max
Fscl Operating Frequency 100 400 1000 kHz
TrRise Time1—— ns
TfFall Time1250 20+0.1Cb2250 120 ns
Electrical Characteristics
346 Datasheet
Table 8-23. LVDS Interface AC characteristics at Various Frequencies (Sheet 1 of 2)
Symbol Parameter Min Nom Max Unit Figures Notes
LLHT LVDS Low-to-High
Transi tion Time 0.25 0.5 0.75 ns
Figure 8-24
1, Across receiver
termination
LHLT LVDS High-to-Low
Transi tion Time 0.25 0.5 0.75 ns 1, Across receiver
termination
Frequency = 40-MHz
TPPos0 Transmitter Output
Pulse for Bit 0 -0.25 0 0.25 ns
Figure 8-25
TPPos1 Transmitter Output
Pulse for Bit 1 3.32 3.57 3.82 ns
TPPos2 Transmitter Output
Pulse for Bit 2 6.89 7.14 7.39 ns
TPPos3 Transmitter Output
Pulse for Bit 3 10.46 10.71 10.96 ns
TPPos4 Transmitter Output
Pulse for Bit 4 14.04 14.29 14.54 ns
TPPos5 Transmitter Output
Pulse for Bit 5 17.61 17.86 18.11 ns
TPPos6 Transmitter Output
Pulse for Bit 6 21.18 21.43 21.68 ns
TJCC Transmitter Jitter
Cycle-to-Cycle 350 370 ps
Frequency = 65-MHz
TPPos0 Transmitter Output
Pulse for Bit 0 -0.20 0 0.20 ns
Figure 8-25
TPPos1 Transmitter Output
Pulse for Bit 1 2.00 2.20 2.40 ns
TPPos2 Transmitter Output
Pulse for Bit 2 4.20 4.40 4.60 ns
TPPos3 Transmitter Output
Pulse for Bit 3 6.39 6.59 6.79 ns
TPPos4 Transmitter Output
Pulse for Bit 4 8.59 8.79 8.99 ns
TPPos5 Transmitter Output
Pulse for Bit 5 10.79 10.99 11.19 ns
TPPos6 Transmitter Output
Pulse for Bit 6 12.99 13.19 13.39 ns
TJCC Transmitter Jitter
Cycle-to-Cycle 250 ps
Datasheet 347
Electrical Characteristics
Frequency = 85–MHz
TPPos0 Transmitter Output
Pulse for Bit 0 -0.20 0 0.20 ns
Figure 8-25
TPPos1 Transmitter Output
Pulse for Bit 1 1.48 1.68 1.88 ns
TPPos2 Transmitter Output
Pulse for Bit 2 3.16 3.36 3.56 ns
TPPos3 Transmitter Output
Pulse for Bit 3 4.84 5.04 5.24 ns
TPPos4 Transmitter Output
Pulse for Bit 4 6.52 6.72 6.92 ns
TPPos5 Transmitter Output
Pulse for Bit 5 8.20 8.40 8.60 ns
TPPos6 Transmitter Output
Pulse for Bit 6 9.88 10.08 10.28 ns
TJCC Transm itt er Ji tter
Cycle-to-Cycle ——250ps
Frequency = 108–MHz
TPPos0 Transmitter Output
Pulse for Bit 0 -0.20 0 0.20 ns
Figure 8-25
TPPos1 Transmitter Output
Pulse for Bit 1 1.12 1.32 1.52 ns
TPPos2 Transmitter Output
Pulse for Bit 2 2.46 2.66 2.86 ns
TPPos3 Transmitter Output
Pulse for Bit 3 3.76 3.96 4.16 ns
TPPos4 Transmitter Output
Pulse for Bit 4 5.09 5.29 5.49 ns
TPPos5 Transmitter Output
Pulse for Bit 5 6.41 6.61 6.81 ns
TPPos6 Transmitter Output
Pulse for Bit 6 7.74 7.94 8.14 ns
TJCC Transm itt er Ji tter
Cycle-to-Cycle ——250ps
Table 8-23. LVDS Interface AC characteristics at Various Frequencies (Sheet 2 of 2)
Symbol Parameter Min Nom Max Unit Figures Notes
Electrical Characteristics
348 Datasheet
NOTES:
1. Measured at each R, G, B termination according to the VESA Test Procedure – Evaluation of Analog Display
Graphics Subsystems Proposal (Version 1, Draft 4, December 1, 2000).
2. R, G, B Max Video Rise/Fall Time: 50% of minimum pixel clock period.
3. R, G, B Min Video Rise/Fall Time: 10% of minimum pixel clock period.
4. Max settling time: 30% of minimum pixel clock period.
5. Video channel-channel output skew: 25% of minimum pixel clock period.
6. Overshoot/undershoot: ±12% of black-white video level (full-scale) step function.
7. Noise injection ratio: 2.5% of maximum luminance voltage (dc to max. pixel frequency).
8. R, G, B AC parameters are strongly dependent on the board implementation.
Table 8-24. CRT DAC AC Characteristics
Parameter Min Nom Max Units Notes
Pixel Clock Frequency 400 MHz
R, G, B Video Rise Time 0.25 1.25 ns 1, 2, 8 (10-90% of black-to-white
transition, @ 400-MHz pixel clock)
R, G, B Video Fall Time 0.25 1.25 ns 1, 3, 8 (90-10% of white-to-black
transition, @ 400-MHz pixel clock)
Settling Time 0.75 ns 1, 4, 8 @ 400-MHz pixel clock
Video channel-to-channel
output skew 0.625 ns 1, 5, 8 @ 400-MHz pixel clock
Overshoot/ Undershoot -0.084 +0.084 V 1, 6, 8 Full-scale voltage step of
0.7 V
Noise Injection Ratio 2.5 % 1, 7, 8
Table 8-25. Clock Timings (Sheet 1 of 3)
Sym Parameter Min Max Unit Notes Figure
PCI Clock (CLKOUT_PCI[4:0])
t1 Period 29.566 30.584 ns 8-9
t2 High Time 10.826 17.850 ns 8-9
t3 Low Time 10.426 17.651 ns 8-9
Duty Cycle 40 60 %
t4 Rising Edge Rate 1.0 4 V/ns 8-9
t5 Falling Edge Rate 1.0 4 V/ns 8-9
Jitter 500 ps 7,9
14 MHz Flex Clock (CLKOUTFLEX[3:0])
t6 Period 69.820 69.862 ns 8-9
t7 High Time 29.975 38.467 ns 8-9
t8 Low Time 29.575 38.267 ns 8-9
Duty Cycle 40 60 %
- Rising Edge Rate 1.0 4 V/ns 5
- Falling Edge Rate 1.0 4 V/ns 5
Jitter 1000 ps 7,9
48 MHz Flex Clock (CLKOUTFLEX3)
t9 Period 20.831 20.835 ns 18-9
t10 High Time 8.217 11.152 ns 8-9
Datasheet 349
Electrical Characteristics
t11 Low Time 7.817 10.952 ns 8-9
Duty Cycle 40 60 %
- Rising Edge Rate 1.0 4 V/ns 5
-Falling Edge Rate 1.0 4 V/ns5
Jitter 350 ps 7,9
CLKOUT_BCLK[1:0]_[P,N]
Period Period SSC On 7.349 7.688 ns 8-28
Period Period SSC Off 7.349 7.651 ns 8-28
DtyCyc Duty Cycle 40 60 % 8-28
V_Swing Differential Output Swing 300 mV 8-28
Slew_rise Rising Edge Rate 1.5 4 V/ns 8-28
Slew_fall Falling Edge Rate 1.5 4 V/ns 8-28
Jitter (CLKOUT_BCLK[0]_P:N]) 150 ps 7,9
Jitter (CLKOUT_BCLK[1]_P:N]) 350 ps 7,9
BCLK Input (CLKIN_BCLK_[P:N])
Period Period SSC on 7.349 7.688 ns 8-28
Period Period SSC Off 7.349 7.651 ns 8-28
Slew Rate 1 8 V/ns 7
Input Jitter (see Clock Chip
Specification) -150ps8
CLKOUT_DP_[P,N]
Period Period SSC On 7.983 8.726 ns 8-28
Period Period SSC Off 7.983 8.684 ns 8-28
DtyCyc Duty Cycle 40 60 % 8-28
V_Swing Differential Output Swing 300 mV 8-28
Slew_rise Rising Edge Rate 1.5 4 V/ns 8-28
Slew_fall Falling Edge Rate 1.5 4 V/ns 8-28
Jitter 350 ps 7,9
CLKOUT_PCIE[7:0], CLKOUT_DMI_[P,N], CLKOUT_PEG_[B:A]_[P,N]
Period Period SSC On 9.849 10.201 ns 8-28
Period Period SSC Off 9.849 10.151 ns 8-28
DtyCyc Duty Cycle 40 60 % 8-28
V_Swing Differential Output Swing 300 mV 8-28
Slew_rise Rising Edge Rate 1.5 4 V/ns 8-28
Slew_fall Falling Edge Rate 1.5 4 V/ns 8-28
Jitter 150 ps 7,9,10
SMBus/SMLink Clock (SMBCLK, SML[1:0]CLK)
fsmb Operating Frequency 10 100 KHz
t18 High time 4.0 50 μs28-18
t19 Low time 4.7 μs8-18
Table 8-25. Clock Timings (Sheet 2 of 3)
Sym Parameter Min Max Unit Notes Figure
Electrical Characteristics
350 Datasheet
t20 Rise time 1000 ns 8-18
t21 Fall time 300 ns 8-18
SMLink0 Clock (SML0CLK) (See note 13)
fsmb Operating Frequency 0 400 KHz
t18_SML High time 0.6 50 μs28-18
t19_SML Low time 1.3 μs8-18
t20_SML Rise time 300 ns 8-18
t21_SML Fall time 300 ns 8-18
HDA_BCLK (Intel® High Definition Audio)
fHDA Operating Frequency 24.0 MHz
Frequency Tolerance 100 ppm
t26a Input Jitter (see Clock Chip
Specification) 300 ppm
t27a High Time (Measured at 0.75 Vcc) 18.75 22.91 ns 8-9
t28a Low Time (Measured at 0.35 Vcc) 18.75 22.91 ns 8-9
SATA Clock and DMI Clock (CLKIN_SATA_[P:N], CLKIN_DMI_[P:N]) from a clock chip
t36 Period 9.997 10.0533 ns
Slew rate 1 8 V/ns
Input Jitter (see Clock Chip
Specification) 150 ps 7
DOT 96MHz (CLKIN_DOT96[P,N]) from a clock chip
t36 Period 10.066 10.768 ns
Slew rate 1 8 V/ns
Input Jitter (see Clock Chip
Specification) 350 ps 7
Suspend Clock (SUSCLK)
fsusclk Operating Frequency 32 kHz 4
t39 High Time 10 μs4
t39a Low Time 10 μs4
Intel® Quiet System Technology
fpwm PWM Operating Frequency 10 28,000 Hz
SPI_CLK
Slew_Rise Output Rise Slew Rate (0.2Vcc -
0.6Vcc) 14V/ns78-29
Slew_Fall Output Fall Slew Rate (0.6Vcc -
0.2Vcc) 14V/ns78-29
XTAL25_IN/XTAL25_OUT
ppm Crystal Tolerance Cut Accuracy Max 35 ppm (@ 25 °C ±3 °C)
ppm Temperature Stability Max 30 ppm @ (-10 °C to 70 °C)
ppm Aging Max 5 ppm
Table 8-25. Clock Timings (Sheet 3 of 3)
Sym Parameter Min Max Unit Notes Figure
Datasheet 351
Electrical Characteristics
NOTES:
1. The CLK48 expects a 40/60% duty cycle.
2. The maximum high time (t18 Max) provide a simple ensured method for devices to detect
bus idle conditions.
3. BCLK Rise and Fall times are measured from 10%VDD and 90%VDD.
4. SUSCLK duty cycle can range from 30% minimum to 70% maximum.
5. Edge rates in a system as measured from 0.8 V to 2.0 V.
6. The active frequency can be 5 MHz, 50 MHz, or 62.5 MHz depending on the interface
speed. Dynamic changes of the normal operating frequency are not allowed.
7. Testing condition: 1 KOhm pull up to Vcc, 1 KOhm pull down and 10 pF pull down and
1/2 inch trace (see Figure 8-29 for more detail).
8. Jitter is specified as cycle to cycle measured in pico seconds. Period min and max includes
cycle to cycle jitter.
9. On all jitter measurements care should be taken to set the zero crossing voltage (for rising
edge) of the clock to be the point where the edge rate is the fastest. Using a Math function
= Average(Derivavitive(Ch1)) and set the averages to 64, place the cursors where the
slope is the highest on the rising edge—usually this lower half of the rising edge. The
reason this is defined is for users trying to measure in a system it is impossible to get the
probe exactly at the end of the Transmission line with large Flip Chip components, this
results in a reflection induced ledge in the middle of the rising edge and will significantly
increase measured jitter.
10. Phase jitter requirement: The designated Gen2 outputs will meet the reference clock jitter
requirements from the PCI Express Gen2 Base Specification. The test is to be performed
on a component test board under quiet conditions with all clock outputs on. Jitter analysis
is performed using a standardized tool provided by the PCI SIG. Measurement
methodology is defined in Intel document “PCI Express Reference Clock Jitter
Measurements”. Note that this is not for CLKOUT_PCIE[7:0].
11. Crystal Specifications provided are guidelines and applies when a 25 MHz crystal is used on
the platform. Total of crystal cut accuracy, temperature stability, frequency variations due
to parasitics and load capacitances and aging is recommended to be less than 90 ppm.
12. When SMLink0 is configured to run in Fast Mode using a soft strap, the operating frequency
is in the range of 300 KHz – 400 KHz.
Electrical Characteristics
352 Datasheet
NOTE:
1. See note 3 of table 4-4 in Section 4.2.2.2 and note 2 of table 4-6 in Section 4.2.3.2 of the
PCI Local Bus Specification, Revision 2.3 for measurement details.
Table 8-26. PCI Interface Timing
Sym Parameter Min Max Units Notes Figure
t40 AD[31:0] Valid Delay 2 11 ns 1 8-10
t41 AD[31:0] Setup Time to PCICLK Rising 7 ns 8-11
t42 AD[31:0] Hold Time from PCICLK Rising 0 ns 8-11
t43
C/BE[3:0]#, FRAME#, TRDY#, IRDY#,
STOP#, PAR, PERR#, PLOCK#, DEVSEL#
Valid Delay from PCICLK Rising
211ns 1 8-10
t44
C/BE[3:0]#, FRAME#, TRDY#, IRDY#,
STOP#, PAR, PERR#, PLOCK#, IDSEL,
DEVSEL# Output Enable Delay from
PCICLK Rising
2ns 8-14
t45
C/BE[3:0]#, FRAME#, TRDY#, IRDY#,
STOP#, PERR#, PLOCK#, DEVSEL#,
GNT[A:B]# Float Delay from PCICLK
Rising
228ns 8-12
t46
C/BE[3:0]#, FRAME#, TRDY#, IRDY#,
STOP#, SERR#, PERR#, DEVSEL#, Setup
Time to PCICLK Rising
7ns 8-11
t47
C/BE[3:0]#, FRAME#, TRDY#, IRDY#,
STOP#, SERR#, PERR#, DEVSEL#,
REQ[A:B]# Hold Time from PCLKIN Rising
0—ns 8-11
t48 PCIRST# Low Pulse Width 1 ms 8-13
t49 GNT[3:0]# Valid Delay from PCICLK
Rising 212ns
t50 REQ[3:0]# Setup Time to PCICLK Rising 12 ns
Datasheet 353
Electrical Characteristics
NOTES:
1. Driver output resistance under steady state drive is specified at 28 ohms at minimum and
43 ohms at maximum.
2. Timing difference between the differential data signals.
3. Measured at crossover point of differential data signals.
4. Measured at 50% swing point of data signals.
5. Measured from last crossover point to 50% swing point of data line at leading edge of EOP.
6. Measured from 10% to 90% of the data signal.
7. Full-speed Data Rate has minimum of 11.97 Mb/s and maximum of 12.03 Mb/s.
8. Low-speed Data Rate has a minimum of 1.48 Mb/s and a maximum of 1.52 Mb/s.
Table 8-27. Universal Serial Bus Timing
Sym Parameter Min Max Units Notes Fig
Full-speed Source (Note 7)
t100 USBPx+, USBPx- Driver Rise Time 4 20 ns 1, CL =
50 pF 8-15
t101 USBPx+, USBPx- Driver Fall Time 4 20 ns 1, CL =
50 pF 8-15
t102
Source Differential Driver Jitter
- To Next Transition
- For Paired Transitions
–3.5
–4
3.5
4
ns
ns
2, 3 8-16
t103 Source SE0 interval of EOP 160 175 ns 4 8-17
t104 Source Jitter for Differential
Transition to SE0 Transition –2 5 ns 5
t105
Receiver Data Jitter Tolerance
- T o Next Transition
- For Paired Transitions
–18.5
–9
18.5
9
ns
ns
38-16
t106 EOP Width: Must accept as EOP 82 ns 4 8-17
t107 Width of SE0 interval during
differential transition —14 ns
Low-speed Source (Note 8)
t108 USBPx+, USBPx – Driver Rise Time 75 300 ns
1, 6
CL = 50 pF
CL = 350 pF
8-15
t109 USBPx+, USBPx – Driver Fall Time 75 300 ns
1,6
CL = 50 pF
CL = 350 pF
8-15
t110
Source Differential Driver Jitter
To N ext Transi tion
For Paired Transitions
–25
–14
25
14
ns
ns
2, 3 8-16
t111 Source SE0 interval of EOP 1.25 1.50 µs 4 8-17
t112 Source Jitter for Differential
Transition to SE0 Transition –40 100 ns 5
t113
Receiver Data Jitter Tolerance
- To Next Transition
- For Paired Transitions
–152
–200
152
200
ns
ns
38-16
t114 EOP Width: Must accept as EOP 670 ns 4 8-17
t115 Width of SE0 interval during
differential transition 210 ns
Electrical Characteristics
354 Datasheet
NOTES:
1. 20% – 80% at transmitter.
2. 80% – 20% at transmitter.
3. As measured from 100 mV differential crosspoints of last and first edges of burst.
4. Operating data period during Out-Of-Band burst transmissions.
Table 8-28. SATA Interface Timings
Sym Parameter Min Max Units Notes Figure
UI Gen I Operating Data Period 666.43 670.23 ps
UI-2 Gen II Operating Data Period (3Gb/
s) 333.21 335.11 ps
t120 Rise Time 0.15 0.41 UI 1
t121 Fall Time 0.15 0.41 UI 2
t122 TX differential skew 20 ps
t123 COMRESET 310.4 329.6 ns 3
t124 COMWAKE transmit spacing 103.5 109.9 ns 3
t125 OOB Operating Data period 646.67 686.67 ns 4
Table 8-29. SMBus Timing (Sheet 1 of 2)
Sym Parameter Min Max Units Notes Fig
t130 Bus Free Time Between Stop and Start
Condition 4.7 µs 8-18
t130SM
LFM
Bus Free Time Between Stop and Start
Condition 1.3 µs 5 8-18
t131
Hold Time after (repeated) Start Condition.
After this period, the first clock is
generated.
4.0 µs 8-18
t131SM
LFM
Hold Time after (repeated) Start Condition.
After this period, the first clock is
generated.
0.6 µs 5 8-18
t132 Repeated Start Condition Setup Time 4.7 µs 8-18
t132SM
LFM
Repeated Start Condition Setup Time 0.6 µs 5 8-18
t133 Stop Condition Setup Time 4.0 µs 8-18
t133SM
LFM
Stop Condition Setup Time 0.6 µs 5 8-18
t134 Data Hold Time 0 ns 4 8-18
t134SM
LFM
Data Hold Time 0 ns 4, 5 8-18
t135 Data Setup Time 250 ns 8-18
t135SM
LFM
Data Setup Time 100 ns 5 8-18
t136 Device Time Out 25 35 ms 1
t137 Cumulative Clock Low Extend Time (slave
device) —25 ms 28-19
Datasheet 355
Electrical Characteristics
NOTES:
1. A device will timeout when any clock low exceeds this value.
2. t137 is the cumulative time a slave device is allowed to extend the clock cycles in one
message from the initial start to stop. If a slave device exceeds this time, it is expected to
release both its clock and data lines and reset itself.
3. t138 is the cumulative time a master device is allowed to extend its clock cycles within
each byte of a message as defined from start-to-ack, ack-to-ack or ack-to-stop.
4. t134 has a minimum timing for I2C of 0 ns, while the minimum timing for SMBus is 300 ns.
5. Timings with the SMLFM designator apply only to SMLink0 and only when SMLink0 is
operating in Fast Mode.
t138 Cumulative Clock Low Extend Time
(master device) —10 ms 38-19
Table 8-29. SMBus Timing (Sheet 2 of 2)
Sym Parameter Min Max Units Notes Fig
Table 8-30. Intel® High Definition Audio Timing
Sym Parameter Min Max Units Notes Fig
t143 Time duration for which HDA_SD is valid
before HDA_BCLK edge. 7—ns 8-21
t144 Time duration for which HDA_SDOUT is valid
after HDA_BCLK edge. 7—ns 8-21
t145 Setup time for HDA_SDIN[3:0] at rising edge
of HDA_BCLK 15 ns 8-21
t146 Hold time for HDA_SDIN[3:0] at rising edge
of HDA_BCLK 0—ns 8-21
Table 8-31. LPC Timing
Sym Parameter Min Max Units Notes Fig
t150 LAD[3:0] Valid Delay from PCICLK Rising 2 11 ns 8-10
t151 LAD[3:0] Output Enable Delay from PCICLK
Rising 2— ns 8-14
t152 LAD[3:0] Float Delay from PCICLK Rising 28 ns 8-12
t153 LAD[3:0] Setup Time to PCICLK Rising 7 ns 8-11
t154 LAD[3:0] Hold Time from PCICLK Rising 0 ns 8-11
t155 LDRQ[1:0]# Setup Time to PCICLK Rising 12 ns 8-11
t156 LDRQ[1:0]# Hold Time from PCICLK Rising 0 ns 8-11
t157 eE# Valid Delay from PCICLK Rising 2 12 ns 8-10
Electrical Characteristics
356 Datasheet
NOTES:
1. The typical clock frequency driven by the PCH is 17.86 MHz.
2. Measurement point for low time and high time is taken at 0.5(VccME3_3).
Table 8-32. Miscellaneous Timings
Sym Parameter Min Max Units Notes Fig
t160 SERIRQ Setup Time to PCICLK Rising 7 ns 8-11
t161 SERIRQ Hold Time from PCICLK Rising 0 ns 8-11
t162 RI#, EXTSMI#, GPIO, USB Resume Pulse
Width 2 RTCCLK 8-13
t163 SPKR Valid Delay from OSC Rising 200 ns 8-10
t164 SERR# Active to NMI Active 200 ns
t165 IGNNE# Inactive from FERR# Inactive 230 ns
Table 8-33. SPI Timings (20 MHz)
Sym Parameter Min Max Units Notes Fig
t180a Serial Clock Frequency - 20M Hz
Operation 17.06 18.73 MHz 1
t183a Tco of SPI_MOSI with respect to serial
clock falling edge at the host -5 13 ns 8-20
t184a Setup of SPI_MISO with respect to serial
clock falling edge at the host 16 ns 8-20
t185a Hold of SPI_MISO with respect to serial
clock falling edge at the host 0—ns 8-20
t186a Setup of SPI_CS[1:0]# assertion with
respect to serial clock rising at the host 30 ns 8-20
t187a Hold of SPI_CS[1:0]# de-assertion with
respect to serial clock falling at the host 30 ns 8-20
t188a SPI_CLK high time 26.37 ns 8-20
t189a SPI_CLK low time 26.82 ns 8-20
Datasheet 357
Electrical Characteristics
NOTES:
1. The typical clock frequency driven by the PCH is 31.25 MHz.
2. Measurement point for low time and high time is taken at 0.5(VccME3_3).
NOTES:
1. Typical clock frequency driven by the PCH is 50 MHz. This frequency is not available for
ES1 samples.
2. When using 50 MHz mode ensure target flash component can meet t188c and t189c
specifications.
3. Measurement point for low time and high time is taken at 0.5(VccME3_3).
Table 8-34. SPI Timings (33 MHz)
Sym Parameter Min Max Units Notes Fig
t180b Serial Clock Frequency - 33 MHz
Operation 29.83 32.81 MHz 1
t183b Tco of SPI_MOSI with respect to serial
clock falling edge at the host -5 5 ns 8-20
t184b Setup of SPI_MISO with respect to serial
clock falling edge at the host 8—ns 8-20
t185b Hold of SPI_MISO with respect to serial
clock falling edge at the host 0—ns 8-20
t186b Setup of SPI_CS[1:0]# assertion with
respect to serial clock rising at the host 30 ns 8-20
t187b Hold of SPI_CS[1:0]# de-assertion with
respect to serial clock falling at the host 30 ns 8-20
t188b SPI_CLK High time 14.88 - ns 8-20
t189b SPI_CLK Low time 15.18 - ns 8-20
Table 8-35. SPI Timings (50 MHz)
Sym Parameter Min Max Units Notes Fig
t180c Serial Clock Frequency - 50MHz Operation 46.99 53.40 MHz 1
t183c Tco of SPI_MOSI with respect to serial
clock falling edge at the host -3 3 ns 8-20
t184c Setup of SPI_MISO with respect to serial
clock falling edge at the host 8—ns 8-20
t185c Hold of SPI_MISO with respect to serial
clock falling edge at the host 0—ns 8-20
t186c
Setup of SPI_CS[1:0]# assertion with
respect to serial clock rising edge at the
host
30 ns 8-20
t187c
Hold of SPI_CS[1:0]# assertion with
respect to serial clock rising edge at the
host
30 ns 8-20
t188c SPI_CLK High time 7.1 ns 2, 3 8-20
t189c SPI_CLK Low time 11.17 ns 2, 3 8-20
Electrical Characteristics
358 Datasheet
NOTES:
1. The originator must drive a more restrictive time to allow for quantized sampling errors by
a client yet still attain the minimum time less than 500 µs. tBIT limits apply equally to tBIT-
A and tBIT-M. PCH is targeted on 1 Mbps which is 1 µs bit time.
2. The minimum and maximum bit times are relative to tBIT defined in the Timing Negotiation
pulse.
3. tBIT-A is the negotiated address bit time and tBIT-M is the negotiated message bit time.
Table 8-36. SST Timings
Sym Parameter Min Max Units Notes Fig
tBIT
Bit time (overall time evident on SST)
Bit time driven by an originator
0.495
0.495
500
250
µs
µs 1-
tBIT,jitter
Bit time jitter between adjacent bits in an
SST message header or data bytes after
timing has been negotiated
——%
tBIT
,drift
Change in bit time across a SST address
or SST message bits as driven by the
originator. This limit only applies across
tBIT-A bit drift and tBIT-M drift.
——%
tH1 High level time for logic '1' 0.6 0.8 x tBIT 2
tH0 High level time for logic '0' 0.2 0.4 x tBIT
tSSTR
Rise time (measured from VOL = 0.3 V to
VIH,min)—25 + 5
ns/
node
tSSTF
Fall time (measured from VOH = 1.1 V to
VIL,max)—33
ns/
node
Datasheet 359
Electrical Characteristics
NOTES:
1. The originator must drive a more restrictive time to allow for quantized sampling errors by
a client yet still attain the minimum time less than 500 µs. tBIT limits apply equally to
tBIT-A and tBIT-M. PCH is targeted on 2 MHz which is 500 ns bit time.
2. The minimum and maximum bit times are relative to tBIT defined in the Timing Negotiation
pulse.
3. Extended trace lengths may appear as additional nodes.
4. tBIT-A is the negotiated address bit time and tBIT-M is the negotiated message bit time.
NOTES:
1. Measured from (CL_Vref – 50 mV to CL_Vref + 50 mV) at the receiving device side.
No test load is required for this measurement as the receiving device fulfills this purpose.
2. CL_Vref = 0.12*(VccSus3_3).
Table 8-37. PECI Timings
Sym Parameter Min Max Units Notes Fig
tBIT
Bit time (overall time evident on
PECI)
Bit time driven by an originator
0.495
0.495
500
250
µs
µs 1
tBIT
,jitter
Bit time jitter between adjacent bits
in an PECI message header or data
bytes after timing has been
negotiated
——%
tBIT
,drift
Change in bit time across a PECI
address or PECI message bits as
driven by the originator. This limit
only applies across tBIT-A bit drift and
tBIT-M drift.
——%
tH1 High level time for logic '1' 0.6 0.8 x tBIT 2
tH0 High level time for logic '0' 0.2 0.4 x tBIT
tPECIR
Rise time (measured from VOL to
VIH,min, Vtt(nom) -5%) 30 + 5 ns/
node 3
tPECIF
Fall time (measured from VOH to
VIL,max, Vtt(nom) +5%) —30
ns/
node 3
Table 8-38. Controller Link Receive Timings
Sym Parameter Min Max Units Notes Fig
t190 Single bit time 13 ns 8-30
t191 Single clock period 15 ns 8-30
t192 Rise time/Fall time 0.11 3.5 V/ns 1 8-31
t193 Setup time before CL_CLK1 0.9 ns 8-30
t194 Hold time after CL_CLK1 0.9 ns 8-30
VIL_AC Input low voltage (AC) CL_Vref –
0.08 V2
VIH_AC Input high voltage (AC) CL_Vref
+0.08 —V2
Electrical Characteristics
360 Datasheet
8.7 Power Sequencing and Reset Signal Timings
Table 8-39. Power Sequencing and Reset Signal Timings (Sheet 1 of 3)
Sym Parameter Min Max Units Notes Fig
t200 VccRTC active to RTCRST# inactive 9 ms 8-1
t201 VccSUS active to RSMRST# inactive 10 ms 1 8-1
t202 RSMRST# inactive to SUSCLK toggling 97 ms 2 8-1
t203 SLP_S5# high to SLP_S4# high 30 us 3 8-2
t204 SLP_S4# high to SLP_S3# high 30 us 4 8-2
t205 Vcc active to PWROK high 10 ms 5 8-2,
8-3
t206 PWROK deglitch time 1 ms 6 8-2,
8-3
t207 VccLAN & VccME stable to MEPWROK
high 1—ms 8-2,
8-4
t208 Clock chip clock outputs to PWROK high 1 ms 8-2,
8-3
t209 PWROK active to PROCPWRGD active See
Note 7 —ms 7
8-2,
8-3
t210 PROCPWRGD high to SUS_STAT# high 1 ms 8-2,
8-3
t211 SUS_STAT# high to PLTRST# high 60 us 8-2,
8-3
t212
LAN_RST# de-assertion or MEPWROK
assertion (whichever comes first) to
SPI message
500 us 18 8-4
t213 MEPWROK asserted to CL_RST1# de-
asserted (Mobile Only) 500 us 8 8-4
t214
DMI message and all PCI Express ports
and DMI in L2/L3 state to SUS_STAT#
active
60 us 8-5
t215 SUS_STAT# active to STP_PCI# active 60 us 8-5
t216 STP_PCI# active to PLTRST# active 150 us 8-5
t217 PLTRST# active to PROCPWRGD
inactive 30 us 8-5
t218 PROCPWRGD deassetion to clocks
invalid 10 us 8-5
t219 Clocks invalid to SLP_S3# assertion 1 us 8-5
t220 SLP_S3# low to SLP_S4# low 30 us 8-5
t221 SLP_S4# low to SLP_S5# low 30 us 8-5
t222 SLP_S3# active to PWROK de-asserted 0 8-5
t223 PWROK rising to DRAMPWRGD rising 0 us 8-6
t224 DRAMPWRGD falling to SLP_S4# falling -100 ns 9 8-6
t225 VccRTC supply active to VccSus
supplies active 0 ms 1, 10 8-1
Datasheet 361
Electrical Characteristics
t226 RTCRST# high to RSMRST# high 20 ns 8-1
t227 VccSUS supplies high to VccME3_3 high 0 ms 1
t228 LAN Power Rails active to LAN_RST#
de-assertion 1—ms11
t229 VccME high to Vcc1_05 high 0 ms 8-2
t230 MEPWROK high to PWROK high 0 ms 8-2
t231 PWROK low to Vcc falling 40 ns 12, 13,
14
t232 MEPWROK falling to VccME or
VccME3_3 falling 40 ns 14
t233 SLP_S3# falling to Vcc falling 5 us 12, 13
t234 LAN_RST# rising to VccLAN falling 40 ns 13, 14
t235 RSMRST# falling to VccSUS falling 40 ns 1, 13,
14
t236 RTCRST# falling to VccRTC falling 0 ms
t237 SLP_LAN# (or LANPHYPC) rising to
Intel LAN Phy power high and stable —20ms
t238
RSMRST# falling to any of VccSUS
supplies, VccME, VccME3_3, or Vcc
falling
40 ns 1, 12,
13, 14
t239 V5REF_Sus active to VccSus3_3 active 0 ms 15
t240 V5REF active to Vcc3_3 active
See
Note
15
—ms15
t241 VccSus supplies active to Vcc supplies
active 0—ms1, 12
t242 HDA_RST# active low pulse width 1 μs
t243 HDA_RST# inactive to HDA_BIT_CLK
startup delay 170 μs
t244
VccSus active to SLP_S5#, SLP_S4#,
SLP_S3#, SUS_STAT#, PLTRST# and
PCIRST#active
—50ns
t245 RSMRST# de-assertion to SLP_S5# de-
assertion 97 ms 16, 2
t246 S4 Wake Event to SLP_S4# inactive
(S4 Wake) See Note Below 3
t247 S3 Wake Event to SLP_S3# inactive
(S3 Wake) See Note Below 4
t248 SLP_M# inactive to SLP_S3# inactive ±10 ns
t250 LANRST# assertion to PWROK
assertion 0—ms
t251 RSMRST# de-assertion to MEPWROK
assertion 0—ms
Table 8-39. Power Sequencing and Reset Signal Timings (Sheet 2 of 3)
Sym Parameter Min Max Units Notes Fig
Electrical Characteristics
362 Datasheet
NOTES:
1. VccSus supplies include VccSus3_3, V5REF_Sus, VccSusHDA, VccLAN (if LAN powered in
S3/S4/S5), and VccME3_3 and VccME (if Intel® ME powered in S3/S4/S5).
2. This timing is a nominal value counted using RTC clock. If RTC clock isn’t already stable at
the rising edge of RSMRST#, this timing could be shorter or longer than the specified
value.
3. Dependency on SLP_S4# and SLP_M# stretching.
4. Dependency on SLP_S3# and SLP_M# stretching.
5. It is required that the power rails associated with PCI/PCIe (typically the 3.3 V, 5 V, and
12 V core well rails) have been valid for 99 ms prior to PWROK assertion to comply with
the 100 ms PCI/PCIe 2.0 specification on PLTRST# de-assertion. System designers must
ensure the requirement is met on the platforms.
6. Ensure PWROK is a solid logic '1' before proceeding with the boot sequence.
NOTE: If PWROK drops after t206 it will be considered a power failure.
7. t209 minimum timing selectable as 1 ms (recommended), 5 ms, 50 ms, or 100 ms using
bits 9:8 of PCHSTRP15.
8. Requires SPI messaging to be completed.
9. The negative min timing implies that DRAMPWRGD must either fall before SLP_S4# or
within 100 ns after it.
10. The VccSus supplies must never be active while the VccRTC supply is inactive.
11. Measured from VccLAN power within voltage specification to LAN_RST# = (Vih+Vil)/2. The
rising edge of LAN_RST# needs to be a clean, monotonic edge for frequency content below
10 MHz.
12. Vcc includes VccIO, VccCORE, Vcc3_3, VccADPLLA, VccADPLLB, VccADAC, V5REF,
V_CPU_IO, VccDMI, VccLAN (if LAN only power in S0), VccALVDS (mobile only),
VccTX_LVDS (mobile only), and VccME3_3 and VccME (if Intel® ME only powered in S0).
13. A Power rail is considered to be inactive when the rail is at its nominal voltage minus 5% or
less.
14. Board design may meet (t231 AND t232 AND t234 AND t235) OR (t238).
15. V5REF must be powered up before Vcc3_3, or after Vcc3_3 within 0.7 V. Also, V5REF must
power down after Vcc3_3, or before Vcc3_3 within 0.7 V. V5REF_Sus must be powered up
before VccSus3_3, or after VccSus3_3 within 0.7 V. Also, V5REF_Sus must power down
after VccSus3_3, or before VccSus3_3 within 0.7 V.
16. If RTC clock is not already stable at RSMRST# rising edge, this time may be longer.
17. RSMRST# falling edge must transition to 0.8 V or less before VccSus3_3 drops to 2.9 V
18. LAN_RST# high to SPI Soft-Start Reads is an internal PCH timing. The timing cannot be
measured externally and included here for general power sequencing reference.
t252 THRMTRIP# active to SLP_S3#,
SLP_S4#, SLP_S5# active —175ns
t253 RSMRST# rising edge transition from
20% to 80% —50μs
t254 RSMRST# falling edge transition 17
Table 8-39. Power Sequencing and Reset Signal Timings (Sheet 3 of 3)
Sym Parameter Min Max Units Notes Fig
Datasheet 363
Electrical Characteristics
8.8 Power Management Timing Diagrams
Figure 8-1. G3 w/RTC Loss to S4/S5 Timing Diagram
Figure 8-2. S5 to S0 Timing Diagram
Signal NameDestinationSource
SUSCLK
RSMRST#
Board PCH
PCH Board
VccRTCBoard PCH
RTCRST#Board PCH
t200
VccSUSBoard PCH
t201
SLP_S5#PCH Board
t202
toggling
Only for S4 after G3
t226
t225
MEPWROK may come up earlier
than PWROK, but no later
LAN_RST# may come up earlier than or at the same time as PWROK, or it
may be statically grounded for platforms not using Intel LAN
SLP_S3#
VccME
SLP_M#
Signal NameDestSource
SLP_S4#
SLP_S5#
PCH Board
PCH Board
PCH Board
PCH Board
Board PCH
VCC_CPU
Board Processor
Could come up as early as before SLP_S5#
or as late as SLP_S3#, but no later
stable
STP_PCI#
Clock Chip
Outputs
PROCPWRGD
SUS_STAT#
PWROK
DRAMPWRGD
SYS_PWROK
Processor
VRM PCH
Board PCH
PCH Processor
MEPWROKBoard PCH
VccBoard PCH
PCH Clock Chip Ramps to ‘1’ with
Vcc power
t208
Clock Chip PCH
t209
PLTRST#
t210
PCH Processor
PCH Board
PCH Processor/
Board
t203
t204
No required ordering w.r.t. PWROK, but
SYS_PWROK will typically be first
t205
LAN_RST#Board PCH
t207
t211
t206
t229
t230
Electrical Characteristics
364 Datasheet
Figure 8-3. S3/M3 to S0 Timing Diagram
Figure 8-4. S5/Moff - S5/M3 Timing Diagram
SLP_S3#
VccME
SLP_M#
Signal NameDestSource
SLP_S4#
SLP_S5#
PCH Board
PCH Board
PCH Board
PCH Board
Board PCH
Vcc_cpu
Board Processor
stable
STP_PCI#
Clock Chip
Outputs
PROCPWRGD
SUS_STAT#
PWROK
DRAMPWRGD
SYS_PWROK
Processor
VRM PCH
Board PCH
PCH Processor
MEPWROKBoard PCH
Vcc
Board PCH
PCH Clock Chip Ramps to ‘1’ with
Vcc_main
t208
Clock Chip PCH
t209
PLTRST#
t210
PCH Processor
PCH Board
PCH Processor/
Board
No required ordering w .r.t. PWROK, but
SYS_PWROK will typically be first
t205
LAN_RST#Board PCH
t211
t206
SLP_S3#
VccME, VccLAN
SLP_M#
Signal NameDestSource
SLP_S4#
SLP_S5#
PCH Board
PCH Board
PCH Board
PCH Board
Board PCH
SPI
CL_RST1#
MEPWROKBoard PCH
PCH SPI
Flash
PCH Controller Link
LAN_RST#Board PCH
t212
t207
t213
LAN_RST# will come up at the same time as MEPWROK, or it may
be statically grounded for platforms not using Intel LAN
Datasheet 365
Electrical Characteristics
Figure 8-5. S0 to S5 Timing Diagram
Figure 8-6. DRAMPWRGD Timing Diagram
Signal NameDestSource
DMI
PCIe PortsPCH PCIe*
Devices
normal
operation L2/L3
DMI Message L2/L3
SUS_STAT#
STP_PCI#
PCH Board
PCH Clock Chip &
Integrated Clk
t214
PLTRST#PCH Board
t215
t216
THRMTRIP#CPU PCH honored
valid
PROCPWRGDPCH Board
ClocksPCH Board
SLP_S3#PCH Board
PWROKBoard PCH
t218
t219
ignored
t222
SLP_M#
SLP_S4#
SLP_S5#PCH Board
PCH Board
PCH Board
DRAMPWRGDPCH Processor
Intel® ME-Related Signals
Going to M3: stay high
Going to MOFF: go low
SYS_PWROKBoard PCH
MEPWROK /
LAN_RST#
Board PCH
t220
t221
t217
May drop before or after
SLP_S4/5# and DRAMPWRGD
CL_RST#1
PCH Controller
Link
Signal NameDestinationSource
SLP_S4#PCH Board
PWROKBoard PCH
t223
DRAMPWRGDPCH Processor t224
Electrical Characteristics
366 Datasheet
8.9 AC Timing Diagrams
Figure 8-7. Clock Cycle Time
Figure 8-8. Transmitting Position (Data to Strobe)
Figure 8-9. Clock Timing
CLKA/
CLKB
YA/YB
Tppos1
Tppos2
Tppos3
Tppos4
Tppos5
Tppos6
Tppos0
2.0V
0.8V
Period
High Time
Low Time
Fall Time Rise Time
Datasheet 367
Electrical Characteristics
Figure 8-10. Valid Delay from Rising Clock Edge
Figure 8-11. Setup and Hold Times
Figure 8-12. Float Delay
Figure 8-13. Pulse Width
Clock 1.5V
Valid Delay
VT
Output
Clock
VTInput
Hold TimeSetup Time
VT
1.5V
Input VT
Output
Float
Delay
VT
Pulse Width
VT
Electrical Characteristics
368 Datasheet
Figure 8-14. Output Enable Delay
Figure 8-15. USB Rise and Fall Times
Figure 8-16. USB Jitter
Clock
Output
Output
Enable
Delay
VT
1.5V
Differential
Data Lines
90%
10% 10%
90%
tRtF
Rise Time Fall Time
CL
CL
Low-speed: 75 ns at CL = 50 pF, 300 ns at CL = 350 pF
Full-speed: 4 to 20 ns at CL = 50 pF
High-speed: 0.8 to 1.2 ns at CL = 10 pF
Paired
Transitions
Consecutive
Transitions
Crossover
Points
T period
Differential
Data Lines
Jitter
Datasheet 369
Electrical Characteristics
NOTE: txx also refers to txx_SM, SMBCLK also refers to SML[1:0]CLK, and SMBDATA also refers
to SML[1:0]DATA in Figure 8-18.
NOTE: SMBCLK also refers to SML[1:0]CLK and SMBDATA also refers to SML[1:0]DATA in
Figure 8-19.
Figure 8-17. USB EOP Width
Figure 8-18. SMBus/SMLINK Transaction
Differential
Data Lines
EOP
Width
Data
Crossover
Level
Tperiod
t130
SMBCLK
SMBDATA
t131
t19
t134
t20
t21
t135
t132 t18
t133
Figure 8-19. SMBus/SMLINK Timeout
Start Stop
t137
CLK
ack
CLK
ack
t138 t138
SMBCLK
SMBDATA
Electrical Characteristics
370 Datasheet
Figure 8-20. SPI Timings
Figure 8-21. Intel® High Definition Audio Input and Output Timings
SPI_CLK
SPI_MOSI
SPI_MISO
SPI_CS#
t186 t187
t184 t185
t183
t189t188
HDA_SDOUT
HDA_SDIN[3:0]
HDA_BIT_CLK
t143 t143
t144 t144
t145 t146
Datasheet 371
Electrical Characteristics
Figure 8-22. Dual Channel Interface Timings
Figure 8-23. Dual Channel Interface Timings
Figure 8-24. LVDS Load and Transition Times
DQs
DQ[7:0]
tDQSL
tDH tDS
tDQS
tDH tDS
DQ
DQ[7:0]
tDVW
tDQSQ tDQSQtQH
Electrical Characteristics
372 Datasheet
Figure 8-25. Transmitting Position (Data to Strobe)
CLKA/
CLKB
YA/YB
Tppos1
Tppos2
Tppos3
Tppos4
Tppos5
Tppos6
Tppos0
Figure 8-26. PCI Express Transmitter Eye
Datasheet 373
Electrical Characteristics
Figure 8-27. PCI Express Receiver Eye
VRS-Diffp-p-Min>175mV
.4 UI =TRX-EYE min
VTS-Diff = 0mV
D+/D- Crossing point
Electrical Characteristics
374 Datasheet
Figure 8-28. Measurement Points for Differential Waveforms.
V min = -0.30V
V max = 1 .15V
Vcr oss max =
550 mV
Vcross mi n = 300 mV
Vcross delta = 140 mV
V min = -0. 30V
V max = 1.15 V
Vcross max =
550mV
Vcr oss mi n = 300 m V
Vcross delta = 140m V
Clock#
Clock
Clock
Clock#
Vcr oss m edian
Clock
Clock#
Vcross m edian
Clock
Clock#
Vcross medi an
+75 m V
Vcross median -75mV
Trise
Tfall
Clock-Clock#
Vih_ min = +150 mV
Vil_max = -150 mV
Positive Duty Cycle (Differential )
0.0V
Clock-Clock#
.0V
Negative Duty Cycle (Differential )
Clock Period (Differential)
Fall
Edge
Rate
Rise
Edge
Rate
Differential Clock – Differential Measurements
Differential Clock – Single Ended Measurements
Datasheet 375
Electrical Characteristics
§ §
Figure 8-29. PCH Test Load
Figure 8-30. Controller Link Receive Timings
Figure 8-31. Controller Link Receive Slew Rate
VccME3_3
t190
CL_CLK1
CL_DATA1
t191
t193 t194
t192
CL_Vref – 50mV
CL_Vref + 50mV
t192
CL_Vref
CL_CLK1 / CL_DATA1
Electrical Characteristics
376 Datasheet
Datasheet 377
Register and Memory Mapping
9 Register and Memory Mapping
The PCH contains registers that are located in the processor’s I/O space and memory
space and sets of PCI configuration registers that are located in PCI configuration
space. This chapter describes the PCH I/O and memory maps at the register-set level.
Register access is also described. Register-level address maps and Individual register
bit descriptions are provided in the following chapters. The following notations and
definitions are used in the register/instruction description chapters.
RO Read Only. In some cases, if a register is read only, writes to this
register location have no effect. However, in other cases, two
separate registers are located at the same location where a read
accesses one of the registers and a write accesses the other
register. See the I/O and memory map tables for details.
WO Write Only. In some cases, if a register is write only, reads to this
register location have no effect. However, in other cases, two
separate registers are located at the same location where a read
accesses one of the registers and a write accesses the other
register. See the I/O and memory map tables for details.
R/W Read/Write. A register with this attribute can be read and
written.
R/WC Read/Write Clear. A register bit with this attribute can be read
and written. However, a write of 1 clears (sets to 0) the
corresponding bit and a write of 0 has no effect.
R/WO Read/Write-Once. A register bit with this attribute can be
written only once after power up. After the first write, the bit
becomes read only.
R/WL Read/Write Lockable. A register bit with the attribute can be
read at any time but writes may only occur if the associated lock
bit is set to unlock. If the associated lock bit is set to lock, this
register bit becomes RO unless otherwise indicated.
R/WLO Read/Write, Lock-Once. A register bit with this attribute can be
written to the non-locked value multiple times, but to the locked
value only once. After the locked value has been written, the bit
becomes read only.
Reserved The value of reserved bits must never be changed. For details
see Section 9.2.
Default When the PCH is reset, it sets its registers to predetermined
default states. It is the responsibility of the system initialization
software to determine configuration, operating parameters, and
optional system features that are applicable, and to program the
PCH registers accordingly.
Bold Register bits that are highlighted in bold text indicate that the
bit is implemented in the PCH. Register bits that are not
implemented or are hardwired will remain in plain text.
Register and Memory Mapping
378 Datasheet
9.1 PCI Devices and Functions
The PCH incorporates a variety of PCI devices and functions, as shown in Table 9-1.
They are divided into seven logical devices for consumer SKUs. The first is the DMI-To-
PCI bridge (Device 30). The second device (Device 31) contains most of the standard
PCI functions that always existed in the PCI-to-ISA bridges (South Bridges), such as
the Intel® PIIX4. The third and fourth (Device 29 and Device 26) are the USB and
USB2 host controller devices. The fifth (Device 28) is PCI Express device. The sixth
(Device 27) is HD Audio controller device. The seventh (Device 25) is the Gigabit
Ethernet controller device. The eighth device (Device 22) is the Intel® Management
Engine Interface (Intel® MEI).
If for some reason, the particular system platform does not want to support any one of
the Device Functions, with the exception of D30:F0 and D23:F0 can individually be
disabled. The integrated Gigabit Ethernet controller will be disabled if no Platform LAN
Connect component is detected (See Chapter 5.3). When a function is disabled, it does
not appear at all to the software. A disabled function will not respond to any register
reads or writes, insuring that these devices appear hidden to software.
b
NOTES:
1. The PCI-to-LPC bridge contains registers that control LPC, Power Management, System
Management, GPIO, Processor Interface, RTC, Interrupts, Timers, and DMA.
2. SATA controller 2 (D31:F5) is only visible when D31:F2 CC.SCC=01h.
3. This table shows the default PCI Express Function Number-to-Root Port mapping. Function
numbers for a given root port are assignable through the “Root Port Function Number and
Hide for PCI Express Root Ports” register (RCBA+0404h).
4. Prior to BIOS initialization of the PCH USB subsystem, the EHCI controllers will appear as
Function 7. After BIOS initialization, the EHCI controllers will be Function 0.
Table 9-1. PCI Devices and Functions
Bus:Device:Function Function Description
Bus 0:Device 30:Function 0 PCI-to-PCI Bridge
Bus 0:Device 31:Function 0 LPC Controller1
Bus 0:Device 31:Function 2 SATA Controller #1
Bus 0:Device 31:Function 3 SMBus Controller
Bus 0:Device 31:Function 5 SATA Controller #22
Bus 0:Device 31:Function 6 Thermal Subsystem
Bus 0:Device 29:Function 0 USB EHCI Controller #1
Bus 0:Device 26:Function 0 USB EHCI Controller #2
Bus 0:Device 28:Function 0 PCI Express* Port 1
Bus 0:Device 28:Function 1 PCI Express Port 2
Bus 0:Device 28:Function 2 PCI Express Port 3
Bus 0:Device 28:Function 3 PCI Express Port 4
Bus 0:Device 28:Function 4 PCI Express Port 5
Bus 0:Device 28:Function 5 PCI Express Port 6
Bus 0:Device 28:Function 6 PCI Express Port 7
Bus 0:Device 28:Function 7 PCI Express Port 8
Bus 0:Device 27:Function 0 Intel® High Definition Audio Controller
Bus 0:Device 25:Function 0 Gigabit Ethernet Controller
Bus 0:Device 22:Function 0 Intel® Management Engine Interface #1
Bus 0:Device 22:Function 1 Intel® Management Engine Interface #2
Bus 0:Device 22:Function 2 IDE-R
Bus 0:Device 22:Function 3 KT
Datasheet 379
Register and Memory Mapping
9.2 PCI Configuration Map
Each PCI function on the PCH has a set of PCI configuration registers. The register
address map tables for these register sets are included at the beginning of the chapter
for the particular function.
Configuration Space registers are accessed through configuration cycles on the PCI bus
by the Host bridge using configuration mechanism #1 detailed in the PCI Local Bus
Specification, Revision 2.3.
Some of the PCI registers contain reserved bits. Software must deal correctly with
fields that are reserved. On reads, software must use appropriate masks to extract the
defined bits and not rely on reserved bits being any particular value. On writes,
software must ensure that the values of reserved bit positions are preserved. That is,
the values of reserved bit positions must first be read, merged with the new values for
other bit positions and then written back. Note the software does not need to perform
read, merge, write operation for the configuration address register.
In addition to reserved bits within a register, the configuration space contains reserved
locations. Software should not write to reserved PCI configuration locations in the
device-specific region (above address offset 3Fh).
9.3 I/O Map
The I/O map is divided into Fixed and Variable address ranges. Fixed ranges cannot be
moved, but in some cases can be disabled. Variable ranges can be moved and can also
be disabled.
9.3.1 Fixed I/O Address Ranges
Table 9-2 shows the Fixed I/O decode ranges from the processor perspective. Note that
for each I/O range, there may be separate behavior for reads and writes. DMI (Direct
Media Interface) cycles that go to target ranges that are marked as “Reserved” will not
be decoded by the PCH, and will be passed to PCI unless the Subtractive Decode Policy
bit is set (D31:F0:Offset 42h, bit 0). If a PCI master targets one of the fixed I/O target
ranges, it will be positively decoded by the PCH in medium speed.
Address ranges that are not listed or marked “Reserved” are not decoded by the PCH
(unless assigned to one of the variable ranges).
Table 9-2. Fixed I/O Ranges Decoded by Intel® PCH (Sheet 1 of 3)
I/O
Address Read Target Write Target Internal Unit
00h–08h DMA Controller DMA Controller DMA
09h–0Eh RESERVED DMA Controller DMA
0Fh DMA Controller DMA Controller DMA
10h–18h DMA Controller DMA Controller DMA
19h–1Eh RESERVED DMA Controller DMA
1Fh DMA Controller DMA Controller DMA
20h–21h Interrupt Controller Interrupt Controller Interrupt
24h–25h Interrupt Controller Interrupt Controller Interrupt
28h–29h Interrupt Controller Interrupt Controller Interrupt
2Ch–2Dh Interrupt Controller Interrupt Controller Interrupt
2E–2F LPC SIO LPC SIO Forwarded to LPC
Register and Memory Mapping
380 Datasheet
30h–31h Interrupt Controller Interrupt Controller Interrupt
34h–35h Interrupt Controller Interrupt Controller Interrupt
38h–39h Interrupt Controller Interrupt Controller Interrupt
3Ch–3Dh Interrupt Controller Interrupt Controller Interrupt
40h–42h Timer/Counter Timer/Counter PIT (8254)
43h RESERVED Timer/Counter PIT
4E–4F LPC SIO LPC SIO Forwarded to LPC
50h–52h Timer/Counter Timer/Counter PIT
53h RESERVED Timer/Counter PIT
60h Microcontroller Microcontroller Forwarded to LPC
61h NMI Controller NMI Controller Processor I/F
62h Microcontroller Microcontroller Forwarded to LPC
64h Microcontroller Microcontroller Forwarded to LPC
66h Microcontroller Microcontroller Forwarded to LPC
70h RESERVED1NMI and RTC Controller RTC
71h RTC Controller RTC Controller RTC
72h RTC Controller NMI and RTC Controller RTC
73h RTC Controller RTC Controller RTC
74h RTC Controller NMI and RTC Controller RTC
75h RTC Controller RTC Controller RTC
76h RTC Controller NMI and RTC Controller RTC
77h RTC Controller RTC Controller RTC
80h DMA Controller, or LPC, or
PCI DMA Controller and LPC or PCI DMA
81h–83h DMA Controller DMA Controller DMA
84h–86h DMA Controller DMA Controller and LPC or PCI DMA
87h DMA Controller DMA Controller DMA
88h DMA Controller DMA Controller and LPC or PCI DMA
89h–8Bh DMA Controller DMA Controller DMA
8Ch–8Eh DMA Controller DMA Controller and LPC or PCI DMA
08Fh DMA Controller DMA Controller DMA
90h–91h DMA Controller DMA Controller DMA
92h Reset Generator Reset Generator Processor I/F
93h–9Fh DMA Controller DMA Controller DMA
A0h–A1h Interrupt Controller Interrupt Controller Interrupt
A4h–A5h Interrupt Controller Interrupt Controller Interrupt
A8h–A9h Interrupt Controller Interrupt Controller Interrupt
ACh–ADh Interrupt Controller Interrupt Controller Interrupt
B0h–B1h Interrupt Controller Interrupt Controller Interrupt
B2h–B3h Power Management Power Management Power
Management
B4h–B5h Interrupt Controller Interrupt Controller Interrupt
B8h–B9h Interrupt Controller Interrupt Controller Interrupt
Table 9-2. Fixed I/O Ranges Decoded by Intel® PCH (Sheet 2 of 3)
I/O
Address Read Target Write Target Internal Unit
Datasheet 381
Register and Memory Mapping
NOTE:
1. See Section 13.7.2.
BCh–BDh Interrupt Controller Interrupt Controller Interrupt
C0h–D1h DMA Controller DMA Controller DMA
D2h–DDh RESERVED1DMA Controller DMA
DEh–DFh DMA Controller DMA Controller DMA
F0h FERR# / Interrupt
Controller FERR# / Interrupt Controller Processor I/F
170h–177h SATA Controller or PCI SATA Controller or PCI Forwarded to
SATA
1F0h–1F7h SATA Controller or PCI SATA Controller or PCI Forwarded to
SATA
200h-207h Gameport Low Gameport Low Forwarded to LPC
208h-20Fh Gameport High Gameport High Forwarded to LPC
376h SATA Controller or PCI SATA Controller or PCI Forwarded to
SATA
3F6h SATA Controller or PCI SATA Controller or PCI Forwarded to
SATA
4D0h–4D1h Interrupt Controller Interrupt Controller Interrupt
CF9h Reset Generator Reset Generator Processor I/F
Table 9-2. Fixed I/O Ranges Decoded by Intel® PCH (Sheet 3 of 3)
I/O
Address Read Target Write Target Internal Unit
Register and Memory Mapping
382 Datasheet
9.3.2 Variable I/O Decode Ranges
Table 9-3 shows the Variable I/O Decode Ranges. They are set using Base Address
Registers (BARs) or other configuration bits in the various PCI configuration spaces.
The PNP software (PCI or ACPI) can use their configuration mechanisms to set and
adjust these values.
Warning: The Variable I/O Ranges should not be set to conflict with the Fixed I/O Ranges.
Unpredictable results if the configuration software allows conflicts to occur. The PCH
does not perform any checks for conflicts.
NOTE:
1. All ranges are decoded directly from DMI. The I/O cycles will not be seen on PCI, except the range
associated with PCI bridge.
2. The LAN range is typically not used, as the registers can also be accessed via a memory space.
3. There is also an alias 400h above the parallel port range that is used for ECP parallel ports.
Table 9-3. Variable I/O Decode Ranges
Range Name Mappable Size
(Bytes) Target
ACPI Anywhere in 64 KB I/O Space 64 Power Management
IDE Bus Master Anywhere in 64 KB I/O Space 1. 16 or 32
2. 16
1. SATA Host
Controller #1, #2
2. IDE-R
Native IDE Command Anywhere in 64 KB I/O Space18
1. SATA Host
Controller #1, #2
2. IDE-R
Native IDE Control Anywhere in 64 KB I/O Space14
1. SATA Host
Controller #1, #2
2. IDE-R
SATA Index/Data Pair Anywhere in 64 KB I/O Space 16 SATA Host Controller
#1, #2
SMBus Anywhere in 64 KB I/O Space 32 SMB Unit
TCO 96 Bytes above ACPI Base 32 TCO Unit
GPIO Anywhere in 64 KB I/O Space 128 GPIO Unit
Parallel Port 3 Ranges in 64 KB I/O Space 83LPC Peripheral
Serial Port 1 8 Ranges in 64 KB I/O Space 8 LPC Peripheral
Serial Port 2 8 Ranges in 64 KB I/O Space 8 LPC Peripheral
Floppy Disk Controller 2 Ranges in 64 KB I/O Space 8 LPC Peripheral
LAN Anywhere in 64 KB I/O Space 322LAN Unit
LPC Generic 1 Anywhere in 64 KB I/O Space 4 to 256 LPC Peripheral
LPC Generic 2 Anywhere in 64 KB I/O Space 4 to 256 LPC Peripheral
LPC Generic 3 Anywhere in 64 KB I/O Space 4 to 256 LPC Peripheral
LPC Generic 4 Anywhere in 64 KB I/O Space 4 to 256 LPC Peripheral
I/O Trapping Ranges Anywhere in 64 KB I/O Space 1 to 256 Trap on Backbone
PCI Bridge Anywhere in 64 KB I/O Space I/O Base/
Limit PCI Bridge
PCI Express Root Ports Anywhere in 64 KB I/O Space I/O Base/
Limit
PCI Express Root Ports
1-8
KT Anywhere in 64 KB I/O Space 8 KT
Datasheet 383
Register and Memory Mapping
9.4 Memory Map
Table 9-4 shows (from the processor perspective) the memory ranges that the PCH
decodes. Cycles that arrive from DMI that are not directed to any of the internal
memory targets that decode directly from DMI will be driven out on PCI unless the
Subtractive Decode Policy bit is set (D31:F0:Offset 42h, bit 0).
PCI cycles generated by external PCI masters will be positively decoded unless they fall
in the PCI-to-PCI bridge memory forwarding ranges (those addresses are reserved for
PCI peer-to-peer traffic). If the cycle is not in the internal LAN controller’s range, it will
be forwarded up to DMI. Software must not attempt locks to the PCH memory-mapped
I/O ranges for EHCI and HPET. If attempted, the lock is not honored which means
potential deadlock conditions may occur.
Table 9-4. Memory Decode Ranges from Processor Perspective (Sheet 1 of 3)
Memory Range Target Dependency/Comments
0000 0000h–000D FFFFh
0010 0000h–TOM
(Top of Memory)
Main Memory TOM registers in Host controller
000E 0000h–000E FFFFh LPC or SPI Bit 6 in BIOS Decode Enable register is set
000F 0000h–000F FFFFh LPC or SPI Bit 7 in BIOS Decode Enable register is set
FEC_ _000h–FEC_ _040h IO(x) APIC inside
PCH
_ _is controlled using APIC Range Select
(ASEL) field and APIC Enable (AEN) bit
FEC1 0000h–FEC1 7FFF PCI Express* Port 1 PCI Express* Root Port 1 I/OxAPIC Enable
(PAE) set
FEC1 8000h–FEC1 FFFFh PCI Express* Port 2 PCI Express* Root Port 2 I/OxAPIC Enable
(PAE) set
FEC2 0000h–FEC2 7FFFh PCI Express* Port 3 PCI Express* Root Port 3 I/OxAPIC Enable
(PAE) set
FEC2 8000h–FEC2 FFFFh PCI Express* Port 4 PCI Express* Root Port 4 I/OxAPIC Enable
(PAE) set
FEC3 0000h–FEC3 7FFFh PCI Express* Port 5 PCI Express* Root Port 5 I/OxAPIC Enable
(PAE) set
FEC3 8000h–FEC3 FFFFh PCI Express* Port 6 PCI Express* Root Port 6 I/OxAPIC Enable
(PAE) set
FEC4 0000 - FEC4 7FFF PCI Express* Port 7 PCI Express* Root Port 7I/OxAPIC Enable
(PAE) set
FEC4 8000 - FEC4 FFFF PCI Express* Port 8 PCI Express* Root Port 8I/OxAPIC Enable
(PAE) set
FED4 0000h–FED4 BFFFh TPM on LPC None
FFC0 0000h–FFC7 FFFFh
FF80 0000h–FF87 FFFFh LPC or SPI (or PCI)2Bit 8 in BIOS Decode Enable register is set
FFC8 0000h–FFCF FFFFh
FF88 0000h–FF8F FFFFh LPC or SPI (or PCI)2Bit 9 in BIOS Decode Enable register is set
FFD0 0000h–FFD7 FFFFh
FF90 0000h–FF97 FFFFh LPC or SPI (or PCI)2Bit 10 in BIOS Decode Enable register is set
FFD8 0000h–FFDF FFFFh
FF98 0000h–FF9F FFFFh LPC or SPI (or PCI)2Bit 11 in BIOS Decode Enable register is set
FFE0 000h–FFE7 FFFFh
FFA0 0000h–FFA7 FFFFh LPC or SPI (or PCI)2Bit 12 in BIOS Decode Enable register is set
Register and Memory Mapping
384 Datasheet
FFE8 0000h–FFEF FFFFh
FFA8 0000h–FFAF FFFFh LPC or SPI (or PCI)2Bit 13 in BIOS Decode Enable register is set
FFF0 0000h–FFF7 FFFFh
FFB0 0000h–FFB7 FFFFh LPC or SPI (or PCI)2Bit 14 in BIOS Decode Enable register is set
FFF8 0000h–FFFF FFFFh
FFB8 0000h–FFBF FFFFh LPC or SPI (or PCI)2
Always enabled.
The top two, 64 KB blocks of this range can
be swapped, as described in Section 9.4.1.
FF70 0000h–FF7F FFFFh
FF30 0000h–FF3F FFFFh LPC or SPI (or PCI)2Bit 3 in BIOS Decode Enable register is set
FF60 0000h–FF6F FFFFh
FF20 0000h–FF2F FFFFh LPC or SPI (or PCI)2Bit 2 in BIOS Decode Enable register is set
FF50 0000h–FF5F FFFFh
FF10 0000h–FF1F FFFFh
LPC or SPI (or PCI)2
Hub (or PCI)2Bit 1 in BIOS Decode Enable register is set
FF40 0000h–FF4F FFFFh
FF00 0000h–FF0F FFFFh LPC or SPI (or PCI)2Bit 0 in BIOS Decode Enable register is set
128 KB anywhere in 4-GB
range
Integrated LAN
Controller
Enable using BAR in Device 25:Function 0
(Integrated LAN Controller MBARA)
4 KB anywhere in 4 GB
range
Integrated LAN
Controller
Enable using BAR in Device 25:Function 0
(Integrated LAN Controller MBARB)
1 KB anywhere in 4-GB
range
USB EHCI
Controller #11
Enable using standard PCI mechanism
(Device 29, Function 0)
1 KB anywhere in 4-GB
range
USB EHCI
Controller #21
Enable using standard PCI mechanism
(Device 26, Function 0)
512 B anywhere in 64-bit
addressing space
Intel® High
Definition Audio
Host Controller
Enable using standard PCI mechanism
(Device 27, Function 0)
FED4 0000h–FED4 FFFFh TPM on LPC None
Memory Base/Limit
anywhere in 4 GB range PCI Bridge Enable via standard PCI mechanism (Device
30: Function 0)
Prefetchable Memory
Base/Limit anywhere in
64-bit address range
PCI Bridge Enable via standard PCI mechanism (Device
30: Function 0)
64 KB anywhere in 4 GB
range LPC
LPC Generic Memory Range. Enable via
setting bit[0] of the LPC Generic Memory
Range register (D31:F0:offset 98h).
32 Bytes anywhere in 64-
bit address range SMBus Enable using standard PCI mechanism
(Device 31: Function 3)
2 KB anywhere above
64 KB to 4 GB range
SATA Host
Controller #1
AHCI memory-mapped registers. Enable
using standard PCI mechanism (Device 31:
Function 2)
Memory Base/Limit
anywhere in 4 GB range
PCI Express Root
Ports 1-8
Enable via standard PCI mechanism (Device
28: Function 0-7)
Prefetchable Memory
Base/Limit anywhere in
64-bit address range
PCI Express Root
Ports 1-8
Enable using standard PCI mechanism
(Device 28: Function 0-7)
4 KB anywhere in 64-bit
address range Thermal Reporting Enable using standard PCI mechanism
(Device 31: Function 6 TBAR/TBARH)
4 KB anywhere in 64-bit
address range Thermal Reporting Enable using standard PCI mechanism
(Device 31: Function 6 TBARB/TBARBH)
Table 9-4. Memory Decode Ranges from Processor Perspective (Sheet 2 of 3)
Memory Range Target Dependency/Comments
Datasheet 385
Register and Memory Mapping
NOTES:
1. Software must not attempt locks to memory mapped I/O ranges for USB EHCI or High
Precision Event Timers. If attempted, the lock is not honored, which means potential
deadlock conditions may occur.
2. PCI is the target when the Boot BIOS Destination selection bits are set to 10b (Chipset
Config Registers:Offset 3401 bits 11:10). When PCI selected, the Firmware Hub Decode
Enable bits have no effect.
9.4.1 Boot-Block Update Scheme
The PCH supports a “top-block swap” mode that has the PCH swap the top block in the
FWH or SPI flash (the boot block) with another location. This allows for safe update of
the Boot Block (even if a power failure occurs). When the “TOP_SWAP” Enable bit is
set, the PCH will invert A16 for cycles going to the upper two 64 KB blocks in the FWH
or appropriate address lines as selected in Boot Block Size (BOOT_BLOCK_SIZE) soft
strap for SPI.
Specifically for FHW, in this mode accesses to FFFF_0000h-FFFF_FFFFh are directed to
FFFE_0000h-FFFE_FFFFh and vice versa. When the Top Swap Enable bit is 0, the PCH
will not invert A16.
Specifically for SPI, in this mode the “Top-Block Swap” behavior is as described below.
When the Top Swap Enable bit is 0, the PCH will not invert any address bit.
This bit is automatically set to 0 by RTCRST#, but not by PLTRST#.
The scheme is based on the concept that the top block is reserved as the “boot” block,
and the block immediately below the top block is reserved for doing boot-block
updates.
16 Bytes anywhere in 64-
bit address range Intel® MEI #1, #2 Enable using standard PCI mechanism
(Device 22: Function 1:0)
4 KB anywhere in 4 GB
range KT Enable using standard PCI mechanism
(Device 22: Function 3)
16 KB anywhere in 4 GB
range
Root Complex
Register Block
(RCRB)
Enable using setting bit[0] of the Root
Complex Base Address register
(D31:F0:offset F0h).
FED0 X000h–FED0 X3FFh High Precision
Event Timers 1
BIOS determines the “fixed” location which is
one of four, 1-KB ranges where X (in the first
column) is 0h, 1h, 2h, or 3h.
All other PCI None
Table 9-4. Memory Decode Ranges from Processor Perspective (Sheet 3 of 3)
Memory Range Target Dependency/Comments
Table 9-5 SPI Mode Address Swapping
BOOT_BLOCK_SIZE
Value Accesses to Being Directed to
000 (64KB) FFFF_0000h–FFFF_FFFFh FFFE_0000h–FFFE_FFFFh and vice versa
001 (128KB) FFFE_0000h–FFFF_FFFFh FFFC_0000h–FFFD_FFFFh and vice versa
010 (256KB) FFFC_0000h–FFFF_FFFFh FFF8_0000h–FFFB_FFFFh and vice versa
011 (512KB) FFF8_0000h–FFFF_FFFFh FFF0_0000h–FFF7_FFFFh and vice versa
100 (1MB) FFF0_0000h–FFFF_FFFFh FFE0_0000h–FFEF_FFFFh and vice versa
101 - 111 Reserved Reserved
Register and Memory Mapping
386 Datasheet
The algorithm is:
1. Software copies the top block to the block immediately below the top
2. Software checks that the copied block is correct. This could be done by performing
a checksum calculation.
3. Software sets the TOP_SWAP bit. This will invert the appropriate address bits for
the cycles going to the FWH or SPI.
4. Software erases the top block
5. Software writes the new top block
6. Software checks the new top block
7. Software clears the TOP_SWAP bit
8. Software sets the Top_Swap Lock-Down bit
If a power failure occurs at any point after step 3, the system will be able to boot from
the copy of the boot block that is stored in the block below the top. This is because the
TOP_SWAP bit is backed in the RTC well.
Note: The top-block swap mode may be forced by an external strapping option (See
Section 2.28). When top-block swap mode is forced in this manner, the TOP_SWAP bit
cannot be cleared by software. A re-boot with the strap removed will be required to exit
a forced top-block swap mode.
Note: Top-block swap mode only affects accesses to the Firmware Hub space, not feature
space for FWH.
Note: The top-block swap mode has no effect on accesses below FFFE_0000h for FWH.
§ §
Datasheet 387
Chipset Configuration Registers
10 Chipset Configuration Registers
This section describes all registers and base functionality that is related to chipset
configuration and not a specific interface (such as LPC, PCI, or PCI Express*). It
contains the root complex register block, which describes the behavior of the upstream
internal link.
This block is mapped into memory space, using the Root Complex Base Address (RCBA)
register of the PCI-to-LPC bridge. Accesses in this space must be limited to 32-(DW) bit
quantities. Burst accesses are not allowed.
All chipset configuration registers are located in the core well unless otherwise
indicated.
10.1 Chipset Configuration Registers (Memory Space)
Note: Address locations that are not shown should be treated as Reserved (see Section 9.2
for details).
.
Table 10-1. Chipset Configuration Register Memory Map (Memory Space) (Sheet 1 of 3)
Offset Mnemonic Register Name Default Type
0014–0017h V0CTL VC 0 Resource Control 800000FFh R/W, RO
001A–001Bh V0STS VC 0 Resource Status 0000h RO
001C–001Fh V1CAP Virtual Channel 1 Resource
Capability 00008001h R/WO,
RO
0020–0023h V1CTL VC 1 Resource Control 00000000h R/W
0026–0027h V1STS VC 1 Resource Status 0000h RO
0050–0053h CIR0 Chipset Initialization Register 0 00000000h R/W
0088–008Bh CIR1 Chipset Initialization Register 1 00000000h R/WO
00AC–00AFh REC Root Error Command 0000h R/W
01A0–01A3h ILCL Internal Link Capability List 00010006h RO
01A4–01A7h LCAP Link Capabilities 00012841h RO, R/
WO
01A8–01A9h LCTL Link Control 0000h R/W
01AA–01ABh LSTS Link Status 0041h RO
0220–0223h BCR Backbone Configuration 00000000h R/W
0224–0227h RPC Root Port Configuration 0000000yh R/W, RO
0234–0327h DMIC DMI Control 00000000h R/W, RO
0238–023Bh RPFN Root Port Function Number for PCI
Express Root Ports 76543210h R/WO,
RO
0290–0293h FLRSTAT Function Level Reset Pending Status
Summary 00000000h RO
1D40–1D47h CIR5 Chipset Initialization Register 5 000000000000
0000h R/W
Chipset Configuration Registers
388 Datasheet
1E00–1E03h TRSR Trap Status Register 00000000h R/WC,
RO
1E10–1E17h TRCR Trapped Cycle Register 000000000000
0000h RO
1E18–1E1Fh TWDR Trapped Write Data Register 000000000000
0000h RO
1E80–1E87h IOTR0 I/O Trap Register 0 000000000000
0000h R/W
1E88–1E8Fh IOTR1 I/O Trap Register 1 000000000000
0000h R/W
1E90–1E97h IOTR2 I/O Trap Register 2 000000000000
0000h R/W
1E98–1E9Fh IOTR3 I/O Trap Register 3 000000000000
0000h R/W
2010–2013h DMC DMI Miscellaneous Control Register 00000002h R/W
2024–2027h CIR6 CIR6—Chipset Initialization Register
60B4030C0h R/W
2324–2327h DMC2 DMI Miscellaneous Control Register
20FFF0FFFh R/W
3000–3000h TCTL TCO Configuration 00h R/W
3100–3103h D31IP Device 31 Interrupt Pin 03243200h R/W, RO
3104–3107h D30IP Device 30 Interrupt Pin 00000000h RO
3108–310Bh D29IP Device 29 Interrupt Pin 10004321h R/W
310C–310Fh D28IP Device 28 Interrupt Pin 00214321h R/W
3110–3113h D27IP Device 27 Interrupt Pin 00000001h R/W
3114–3117h D26IP Device 26 Interrupt Pin 30000321h R/W
3118–311Bh D25IP Device 25 Interrupt Pin 00000001h R/W
3124–3127h D22IP Device 22 Interrupt Pin 00000001h R/W
3140–3141h D31IR Device 31 Interrupt Route 3210h R/W
3142–3143h D30IR Device 30 Interrupt Route 0000h RO
3144–3145h D29IR Device 29 Interrupt Route 3210h R/W
3146–3147h D28IR Device 28 Interrupt Route 3210h R/W
3148–3149h D27IR Device 27 Interrupt Route 3210h R/W
314C–314Fh D26IR Device 26 Interrupt Route 3210h R/W
3150–3153h D25IR Device 25 Interrupt Route 3210h R/W
3154–3157h D24IR Device 24 Interrupt Route 3210h R/W
315C–316Fh D22IR Device 22 Interrupt Route 3210h R/W
31FE–31FFh OIC Other Interrupt Control 0000h R/W
3310–3313h PRSTS Power and Reset Status 02020000h RO, R/
WC
3314–3317h CIR7 Chipset Initalization Register 7 00000000h R/W
Table 10-1. Chipset Configuration Register Memory Map (Memory Space) (Sheet 2 of 3)
Offset Mnemonic Register Name Default Type
Datasheet 389
Chipset Configuration Registers
3324–3327h CIR8 Chipset Initalization Register 8 00000000h R/W
3330–3333h CIR9 Chipset Initalization Register 9 00000000h R/W
3340–3343h CIR10 Chipset Initalization Register 10 00000000h R/W
3350–3353h CIR13 Chipset Initalization Register 13 00000000h R/W
3368–336Bh CIR14 Chipset Initalization Register 14 00000000h R/W
3378–337Bh CIR15 Chipset Initalization Register 15 00000000h R/W
3388–338Bh CIR16 Chipset Initalization Register 16 00000000h R/W
33A0–33A3h CIR17 Chipset Initalization Register 17 00000000h R/W
33A8–33ABh CIR18 Chipset Initalization Register 18 00000000h R/W
33C0–33C3h CIR19 Chipset Initalization Register 19 00000000h R/W
33CC–33CFh CIR20 Chipset Initalization Register 20 00000000h R/W
33D0–33D3h CIR21 Chipset Initalization Register 21 00000000h R/W
33D4–33D7h CIR22 Chipset Initalization Register 22 00000000h R/W
3400–3403h RC RTC Configuration 00000000h R/W,
R/WLO
3404–3407h HPTC High Precision Timer Configuration 00000000h R/W
3410–3413h GCS General Control and Status 000000yy0h R/W,
R/WLO
3414–3414h BUC Backed Up Control 00h R/W
3418–341Bh FD Function Disable 00000000h R/W
341C–341Fh CG Clock Gating 00000000h R/W
3420–3420h FDSW Function Disable SUS Well 00h R/W
3428–342Bh FD2 Function Disable 2 00000000h R/W
3590–3594h MISCCTL Miscellaneous Control Register 00000000h R/W
35A0–35A3h USBOCM1 USB Overcurrent MAP Register 1 00000000h R/WO
35A4–35A7h USBOCM2 USB Overcurrent MAP Register 2 00000000h R/WO
35B0–35B3h RMHWKCTL USB Remap Control 00000000h R/WO
Table 10-1. Chipset Configuration Register Memory Map (Memory Space) (Sheet 3 of 3)
Offset Mnemonic Register Name Default Type
Chipset Configuration Registers
390 Datasheet
10.1.1 V0CTL—Virtual Channel 0 Resource Control Register
Offset Address: 0014–0017h Attribute: R/W, RO
Default Value: 80000023h Size: 32-bit
10.1.2 V0STS—Virtual Channel 0 Resource Status Register
Offset Address: 001A–001Bh Attribute: RO
Default Value: 0000h Size: 16-bit
Bit Description
31 Virtual Channel Enable (EN)—RO. Always set to 1. VC0 is always enabled and
cannot be disabled.
30:27 Reserved
26:24 Virtual Channel Identifier (ID)—RO. Indicates the ID to use for this virtual
channel.
23:16 Reserved
15:8
Extended TC/VC Map (ETVM): Defines the upper 8-bits of the VC0 16-bit TC/VC
mapping registers. These registers use the PCI Express reserved TC[3] traffic class
bit.
7:1
Transaction Class / Virtual Channel Map (TVM)—R/W. Indicates which
transaction classes are mapped to this virtual channel. When a bit is set, this
transaction class is mapped to the virtual channel.
0 Reserved
Bit Description
15:2 Reserved
1VC Negotiation Pending (NP)—RO. When set, indicates the virtual channel is still
being negotiated with ingress ports.
0 Reserved
Datasheet 391
Chipset Configuration Registers
10.1.3 V1CTL—Virtual Channel 1 Resource Control Register
Offset Address: 0020–0023h Attribute: R/W, RO
Default Value: 00000000h Size: 32-bit
10.1.4 V1STS—Virtual Channel 1 Resource Status Register
Offset Address: 0026–0027h Attribute: RO
Default Value: 0000h Size: 16-bit
10.1.5 CIR0—Chipset Initialization Register 0
Offset Address: 0050–0053h Attribute: R/W
Default Value: 00000000h Size: 32-bit
Bit Description
31 Virtual Channel Enable (EN)—R/W. Enables the VC when set. Disables the VC
when cleared.
30:28 Reserved
27:24 Virtual Channel Identifier (ID)—R/W. Indicates the ID to use for this virtual
channel.
23:16 Reserved
15:8
Extended TC/VC Map (ETVM): Defines the upper 8-bits of the VC0 16-bit TC/VC
mapping registers. These registers use the PCI Express reserved TC[3] traffic class
bit.
7:1
Transaction Class / Virtual Channel Map (TVM)—R/W. Indicates which
transaction classes are mapped to this virtual channel. When a bit is set, this
transaction class is mapped to the virtual channel.
0 Reserved
Bit Description
15:2 Reserved
1VC Negotiation Pending (NP)—RO. When set, indicates the virtual channel is still
being negotiated with ingress ports.
0 Reserved
Bit Description
31:0 CIR0 Field 0—R/W. BIOS must set this field.
Chipset Configuration Registers
392 Datasheet
10.1.6 CIR1—Chipset Initialization Register 1
Offset Address: 0088–008Bh Attribute: R/WO
Default Value: 00000000h Size: 32-bit
10.1.7 REC—Root Error Command Register
Offset Address: 00AC–00AFh Attribute: R/W
Default Value: 0000h Size: 32-bit
10.1.8 ILCL—Internal Link Capabilities List Register
Offset Address: 01A0–01A3h Attribute: RO
Default Value: 00010006h Size: 32-bit
Bit Description
31:21 Reserved
20 CIR1 Field 3—R/WO. BIOS must set this bit.
19:16 Reserved
15 CIR1 Field 2—R/WO. BIOS must set this bit.
14:13 Reserved
12 CIR1 Field 1—R/WO. BIOS must set this bit.
11:0 Reserved
Bit Description
31
Drop Poisoned Downstream Packets (DPDP)—R/W. Determines how
downstream packets on DMI are handled that are received with the EP field set,
indicating poisoned data:
1 = This packet and all subsequent packets with data received on DMI for any VC will
have their Unsupported Transaction (UT) field set causing them to master Abort
downstream. Packets without data such as memory, IO and config read requests
are allowed to proceed.
1 = Packets are forwarded downstream without forcing the UT field set.
30:0 Reserved
Bit Description
31:20 Next Capability Offset (NEXT)—RO. Indicates this is the last item in the list.
19:16 Capability Version (CV)—RO. Indicates the version of the capability structure.
15:0 Capability ID (CID)—RO. Indicates this is capability for DMI.
Datasheet 393
Chipset Configuration Registers
10.1.9 LCAP—Link Capabilities Register
Offset Address: 01A4–01A7h Attribute: R/WO, RO
Default Value: 00012841h Size: 32-bit
10.1.10 LCTL—Link Control Register
Offset Address: 01A8–01A9h Attribute: R/W
Default Value: 0000h Size: 16-bit
Bit Description
31:18 Reserved
17:15
L1 Exit Latency (EL1)—R/WO.
000b = Less than 1 µs
001b = 1 µs to less than 2 µs
010b = 2 µs to less than 4 µs
011b = 4 µs to less than 8 µs
100b = 8 µs to less than 16 µs
101b = 16 µs to less than 32 µs
110b = 32 µs to 64 µs
111b = More than 64 µs
14:12 L0s Exit Latency (EL0)—R/W. This field indicates that exit latency is 128 ns to
less than 256 ns.
11:10
Active State Link PM Support (APMS)—R/W. Indicates the level of ASPM
support on DMI.
00 = Disabled
01 = L0s entry supported
10 = Reserved
11 = L0s and L1 entry supported
9:4 Maximum Link Width (MLW)—RO. Indicates the maximum link width is 4 ports.
3:0 Maximum Link Speed (MLS)—RO. Indicates the link speed is 2.5 Gb/s.
Bit Description
15:8 Reserved
7
Extended Synch (ES)—R/W. When set, forces extended transmission of FTS
ordered sets when exiting L0s prior to entering L0 and extra TS1 sequences at exit
from L1 prior to entering L0.
6:2 Reserved
1:0
Active State Link PM Control (ASPM)—R/W. Indicates whether DMI should enter
L0s, L1, or both.
00 = Disabled
01 = L0s entry enabled
10 = L1 entry enabled
11 = L0s and L1 entry enabled
Chipset Configuration Registers
394 Datasheet
10.1.11 LSTS—Link Status Register
Offset Address: 01AA–01ABh Attribute: RO
Default Value: 0041h Size: 16-bit
10.1.12 BCR—Backbone Configuration Register
Offset Address: 0220–0223h Attribute: R/W
Default Value: 00000000h Size: 32-bit
10.1.13 RPC—Root Port Configuration Register
Offset Address: 0224–0227h Attribute: R/W, RO
Default Value: 0000000yh (y = 00xxb) Size: 32-bit
Bit Description
15:10 Reserved
9:4 Negotiated Link Width (NLW)—RO. Negotiated link width is x4 (000100b).
3:0 Link Speed (LS)—RO. Link is 2.5 Gb/s.
Bit Description
31:7 Reserved
6BCR Field 2—R/W. BIOS must set this bit.
5:3 Reserved
2:0 BCR Field 1—R/W. BIOS program this field to 101b
Bit Description
31:12 Reserved
11
GBE Over PCIe Root Port Enable (GBEPCIERPEN)—RW.
0 = GbE MAC/PHY communication is not enabled over PCI Express.
1 = The PCI Express port selected by the GBEPCIEPORTSEL register will be used for
GbE MAC/PHY over PCI Express communication
The default value for this register is set by the GBE_PCIE_EN soft strap.
NOTE: GbE and PCIE will use the output of this register and not the soft strap.
Datasheet 395
Chipset Configuration Registers
10:8
GBE Over PCIe Root Port Select (GBEPCIERPSEL)—RW.
If the GBEPCIERPEN is a ‘1’, then this register determines which port is used for GbE
MAC/PHY communication over PCI Express. This register is set by soft strap and is
writable to support separate PHY on motherboard and docking station.
111 = Port 8 (Lane 7)
110 = Port 7 (Lane 6)
101 = Port 6 (Lane 5)
100 = Port 5 (Lane 4)
011 = Port 4 (Lane 3)
010 = Port 3 (Lane 2)
001 = Port 2 (Lane 1)
000 = Port 1 (Lane 0)
The default value for this register is set by the GBE_PCIEPORTSEL[2:0] soft strap.
NOTE: GbE and PCIE will use the output of this register and not the soft strap.
7
High Priority Port Enable (HPE)—R/W.
0 = The high priority path is not enabled.
1 = The port selected by the HPP field in this register is enabled for high priority. It
will be arbitrated above all other VC0 (including integrated VC0) devices.
6:4
High Priority Port (HPP)—R/W. This controls which port is enabled for high priority
when the HPE bit in this register is set.
111 = Port 8
110 = Port 7
101 = Port 6
100 = Port 5
101 = Port 4
010 = Port 3
001 = Port 2
000 = Port 1
3:2
Port Configuration2 (PC2)—RO. This controls how the PCI bridges are organized in
various modes of operation for Ports 5-8. For the following mappings, if a port is not
shown, it is considered a x1 port with no connection.
This bit is set by the PCIEPCS2[1:0] soft strap.
11 = 1 x4, Port 5 (x4)
10 = 2 x2, Port 5 (x2), Port 7 (x2)
01 = 1 x2 and 2 x1s, Port 5 (x2), Port 7 (x1) and Port 8 (x1)
00 = 4 x1s, Port 5 (x1), Port 6 (x1), Port 7 (x1) and Port 8 (x1)
This bit is in the resume well and is only reset by RSMRST#.
1:0
Port Configuration (PC)—RO. This controls how the PCI bridges are organized in
various modes of operation for Ports 1-4. For the following mappings, if a port is not
shown, it is considered a x1 port with no connection.
These bits are set by the PCIEPCS1[1:0] soft strap.
11 = 1 x4, Port 1 (x4)
10 = 2 x2, Port 1 (x2), Port 3 (x2)
01 = 1x2 and 2x1s, Port 1 (x2), Port 3 (x1) and Port 4 (x1)
00 = 4 x1s, Port 1 (x1), Port 2 (x1), Port 3 (x1) and Port 4 (x1)
These bits are in the resume well and are only reset by RSMRST#.
Bit Description
Chipset Configuration Registers
396 Datasheet
10.1.14 DMIC—DMI Control Register
Offset Address: 0234–0237h Attribute: R/W
Default Value: 00000000h Size: 32-bit
10.1.15 RPFN—Root Port Function Number and Hide for PCI
Express* Root Ports Register
Offset Address: 0238–023Ch Attribute: R/WO, RO
Default Value: 76543210h Size: 32-bit
For the PCI Express root ports, the assignment of a function number to a root port is
not fixed. BIOS may re-assign the function numbers on a port by port basis. This
capability will allow BIOS to disable/hide any root port and still have functions 0 thru N-
1 where N is the total number of enabled root ports.
Port numbers will remain fixed to a physical root port.
The existing root port Function Disable registers operate on physical ports (not
functions).
Port Configuration (1x4, 4x1, etc.) is not affected by the logical function number
assignment and is associated with physical ports.
Bit Description
31:2 Reserved
1:0 DMI Clock Gate Enable (DMICGEN)—R/W. BIOS must program this field to 10b.
Bit Description
31
Root Port 8 Config Hide (RP8CH)RW. This bit is used to hide the root port and
any devices behind it from being discovered by the OS. When set to 1, the root port
will not claim any downstream configuration transactions.
30:28
Root Port 8 Function Number (RP8FN)—R/WO. These bits set the function
number for PCI Express Root Port 8. This root port function number must be a
unique value from the other root port function numbers
27
Root Port 7 Config Hide (RP7CH)—RW. This bit is used to hide the root port and
any devices behind it from being discovered by the OS. When set to 1, the root port
will not claim any downstream configuration transactions.
26:24
Root Port 7 Function Number (RP7FN)—R/WO. These bits set the function
number for PCI Express Root Port 7. This root port function number must be a
unique value from the other root port function numbers
23
Root Port 6 Config Hide (RP6CH)RW. This bit is used to hide the root port and
any devices behind it from being discovered by the OS. When set to 1, the root port
will not claim any downstream configuration transactions.
22:20
Root Port 6 Function Number (RP6FN)—R/WO. These bits set the function
number for PCI Express Root Port 6. This root port function number must be a
unique value from the other root port function numbers
19
Root Port 5 Config Hide (RP5CH)—RW. This bit is used to hide the root port and
any devices behind it from being discovered by the OS. When set to 1, the root port
will not claim any downstream configuration transactions.
Datasheet 397
Chipset Configuration Registers
10.1.16 FLRSTAT—FLR Pending Status Register
Offset Address: 0290–0293h Attribute: RO
Default Value: 00000000h Size: 32-bit
18:16
Root Port 5 Function Number (RP5FN)—R/WO. These bits set the function
number for PCI Express Root Port 5. This root port function number must be a
unique value from the other root port function numbers
15
Root Port 4 Config Hide (RP4CH)—RW. This bit is used to hide the root port and
any devices behind it from being discovered by the OS. When set to 1, the root port
will not claim any downstream configuration transactions.
14:12
Root Port 4 Function Number (RP4FN)—R/WO. These bits set the function
number for PCI Express Root Port 4. This root port function number must be a
unique value from the other root port function numbers
11
Root Port 3 Config Hide (RP3CH)—RW. This bit is used to hide the root port and
any devices behind it from being discovered by the OS. When set to 1, the root port
will not claim any downstream configuration transactions.
10:8
Root Port 3 Function Number (RP3FN)—R/WO. These bits set the function
number for PCI Express Root Port 3. This root port function number must be a
unique value from the other root port function numbers
7
Root Port 2 Config Hide (RP2CH)—RW. This bit is used to hide the root port and
any devices behind it from being discovered by the OS. When set to 1, the root port
will not claim any downstream configuration transactions.
6:4
Root Port 2 Function Number (RP2FN)—R/WO. These bits set the function
number for PCI Express Root Port 2. This root port function number must be a
unique value from the other root port function numbers
3
Root Port 1 Config Hide (RP1CH)—RW. This bit is used to hide the root port and
any devices behind it from being discovered by the OS. When set to 1, the root port
will not claim any downstream configuration transactions.
2:0
Root Port 1 Function Number (RP1FN)—R/WO. These bits set the function
number for PCI Express Root Port 1. This root port function number must be a
unique value from the other root port function numbers
Bit Description
Bit Description
31:17 Reserved
16
FLR Pending Status for D29:F0, EHCI #1—R0.
0 = Function Level Reset is not pending.
1 = Function Level Reset is pending.
15
FLR Pending Status for D26:F0, EHCI #2—R0.
0 = Function Level Reset is not pending.
1 = Function Level Reset is pending.
10:9 Reserved
8
FLR Pending Status for D26:F0, EHCI#2—R0.
0 = Function Level Reset is not pending.
1 = Function Level Reset is pending.
7:0 Reserved
Chipset Configuration Registers
398 Datasheet
10.1.17 CIR5—Chipset Initialization Register 5
Offset Address: 1D40h–1D47h Attribute: R/W
Default Value: 0000000000000000h Size: 64-bit
10.1.18 TRSR—Trap Status Register
Offset Address: 1E00–1E03h Attribute: R/WC, RO
Default Value: 00000000h Size: 32-bit
10.1.19 TRCR—Trapped Cycle Register
Offset Address: 1E10–1E17h Attribute: RO
Default Value: 0000000000000000h Size: 64-bit
This register saves information about the I/O Cycle that was trapped and generated the
SMI# for software to read.
Bit Description
63:1 Reserved
0CIR5 Field 1—R/W. BIOS must program this field to 1b.
Bit Description
31:4 Reserved
3:0
Cycle Trap SMI# Status (CTSS)—R/WC. These bits are set by hardware when the
corresponding Cycle Trap register is enabled and a matching cycle is received (and
trapped). These bits are OR’ed together to create a single status bit in the Power
Management register space.
Note that the SMI# and trapping must be enabled to set these bits.
These bits are set before the completion is generated for the trapped cycle, thereby
ensuring that the processor can enter the SMI# handler when the instruction
completes. Each status bit is cleared by writing a 1 to the corresponding bit location
in this register.
Bit Description
63:25 Reserved
24
Read/Write# (RWI)—RO.
0 = Trapped cycle was a write cycle.
1 = Trapped cycle was a read cycle.
23:20 Reserved
19:16
Active-high Byte Enables (AHBE)—RO. This is the DWord-aligned byte enables
associated with the trapped cycle. A 1 in any bit location indicates that the
corresponding byte is enabled in the cycle.
15:2 Trapped I/O Address (TIOA)—RO. This is the DWord-aligned address of the
trapped cycle.
1:0 Reserved
Datasheet 399
Chipset Configuration Registers
10.1.20 TWDR—Trapped Write Data Register
Offset Address: 1E18–1E1Fh Attribute: RO
Default Value: 0000000000000000h Size: 64-bit
This register saves the data from I/O write cycles that are trapped for software to read.
10.1.21 IOTRn—I/O Trap Register (0–3)
Offset Address: 1E80–1E87h Register 0 Attribute: R/W
1E88–1E8Fh Register 1
1E90–1E97h Register 2
1E98–1E9Fh Register 3
Default Value: 0000000000000000h Size: 64-bit
These registers are used to specify the set of I/O cycles to be trapped and to enable
this functionality.
Bit Description
63:32 Reserved
31:0 Trapped I/O Data (TIOD)—RO. DWord of I/O write data. This field is undefined
after trapping a read cycle.
Bit Description
63:50 Reserved
49
Read/Write Mask (RWM)—R/W.
0 = The cycle must match the type specified in bit 48.
1 = Trapping logic will operate on both read and write cycles.
48
Read/Write# (RWIO)—R/W.
0 = Write
1 = Read
NOTE: The value in this field does not matter if bit 49 is set.
47:40 Reserved
39:36
Byte Enable Mask (BEM)—R/W. A 1 in any bit position indicates that any value in
the corresponding byte enable bit in a received cycle will be treated as a match. The
corresponding bit in the Byte Enables field, below, is ignored.
35:32 Byte Enables (TBE)—R/W. Active-high DWord-aligned byte enables.
31:24 Reserved
23:18
Address[7:2] Mask (ADMA)—R/W. A 1 in any bit position indicates that any value
in the corresponding address bit in a received cycle will be treated as a match. The
corresponding bit in the Address field, below, is ignored. The mask is only provided
for the lower 6 bits of the DWord address, allowing for traps on address ranges up to
256 bytes in size.
17:16 Reserved
15:2 I/O Address[15:2] (IOAD)—R/W. DWord-aligned address
1 Reserved
0
Trap and SMI# Enable (TRSE)—R/W.
0 = Trapping and SMI# logic disabled.
1 = The trapping logic specified in this register is enabled.
Chipset Configuration Registers
400 Datasheet
10.1.22 DMC—DMI Miscellaneous Control Register
Offset Address: 2010–2013h Attribute: R/W
Default Value: 00000002h Size: 32-bit
10.1.23 CIR6—Chipset Initialization Register 6
Offset Address: 2024–2027h Attribute: R/W
Default Value: 0B4030C0h Size: 32-bit
10.1.24 DMC2—DMI Miscellaneous Control Register 2
Offset Address: 2324–2327h Attribute: R/W
Default Value: 0FFF0FFFh Size: 32-bit
Bit Description
31:20 Reserved
19
DMI Misc. Control Field 1—R/W. BIOS shall always program this field.
0 = Disable DMI Power Savings.
1 = Enable DMI Power Savings.
18:0 Reserved
Bit Description
31:24
(Mobile
Only)
Reserved
23:21
(Mobile
Only)
CIR6 Field 2—R/W. BIOS must program this field to 011b.
20:8
(Mobile
Only)
Reserved
31:8
(Desktop
Only)
Reserved
7CIR6 Field 1—R/W. BIOS must clear this bit.
6:0 Reserved
Bit Description
31:28 Reserved
27:16 DMI Misc. Control Field 2—R/W. BIOS shall always program this field.
15:0 Reserved
Datasheet 401
Chipset Configuration Registers
10.1.25 TCTL—TCO Configuration Register
Offset Address: 3000–3000h Attribute: R/W
Default Value: 00h Size: 8-bit
Bit Description
7
TCO IRQ Enable (IE)—R/W.
0 = TCO IRQ is disabled.
1 = TCO IRQ is enabled, as selected by the TCO_IRQ_SEL field.
6:3 Reserved
2:0
TCO IRQ Select (IS)—R/W. Specifies on which IRQ the TCO will internally appear. If
not using the APIC, the TCO interrupt must be routed to IRQ9–11, and that interrupt
is not sharable with the SERIRQ stream, but is shareable with other PCI interrupts. If
using the APIC, the TCO interrupt can also be mapped to IRQ20–23, and can be
shared with other interrupt.
000 = IRQ 9
001 = IRQ 10
010 = IRQ 11
011 = Reserved
100 = IRQ 20 (only if APIC enabled)
101 = IRQ 21 (only if APIC enabled)
110 = IRQ 22 (only if APIC enabled)
111 = IRQ 23 (only if APIC enabled)
When setting the these bits, the IE bit should be cleared to prevent glitching.
When the interrupt is mapped to APIC interrupts 9, 10, or 11, the APIC should be
programmed for active-high reception. When the interrupt is mapped to APIC
interrupts 20 through 23, the APIC should be programmed for active-low reception.
Chipset Configuration Registers
402 Datasheet
10.1.26 D31IP—Device 31 Interrupt Pin Register
Offset Address: 3100–3103h Attribute: R/W, RO
Default Value: 03243200h Size: 32-bit
Bit Description
31:28 Reserved
27:24
Thermal Sensor Pin (TSIP)—R/W. Indicates which pin the Thermal Sensor
controller drives as its interrupt
0h = No interrupt
1h = INTA#
2h = INTB# (Default)
3h = INTC#
4h = INTD#
5h–Fh = Reserved
23:20
SATA Pin 2 (SIP2)—R/W. Indicates which pin the SATA controller 2 drives as its
interrupt.
0h = No interrupt
1h = INTA#
2h = INTB# (Default)
3h = INTC#
4h = INTD#
5h–Fh = Reserved
19:16 Reserved
15:12
SMBus Pin (SMIP)—R/W. Indicates which pin the SMBus controller drives as its
interrupt.
0h = No interrupt
1h = INTA#
2h = INTB# (Default)
3h = INTC#
4h = INTD#
5h–Fh = Reserved
11:8
SATA Pin (SIP)—R/W. Indicates which pin the SATA controller drives as its
interrupt.
0h = No interrupt
1h = INTA#
2h = INTB# (Default)
3h = INTC#
4h = INTD#
5h–Fh = Reserved
7:4 Reserved
3:0 LPC Bridge Pin (LIP)—RO. Currently, the LPC bridge does not generate an interrupt,
so this field is read-only and 0.
Datasheet 403
Chipset Configuration Registers
10.1.27 D30IP—Device 30 Interrupt Pin Register
Offset Address: 3104–3107h Attribute: RO
Default Value: 00000000h Size: 32-bit
10.1.28 D29IP—Device 29 Interrupt Pin Register
Offset Address: 3108–310Bh Attribute: R/W
Default Value: 10004321h Size: 32-bit
Bit Description
31:4 Reserved
3:0 PCI Bridge Pin (PIP)—RO. Currently, the PCI bridge does not generate an interrupt,
so this field is read-only and 0.
Bit Description
31:4 Reserved
3:0
EHCI #1 Pin (E1P)—R/W. Indicates which pin the EHCI controller #1 drives as its
interrupt, if controller exists.
0h = No interrupt
1h = INTA# (Default)
2h = INTB#
3h = INTC#
4h = INTD#
5h–7h = Reserved
NOTE: EHCI Controller #1 is mapped to Device 29 Function 0 when RMH is enabled.
Chipset Configuration Registers
404 Datasheet
10.1.29 D28IP—Device 28 Interrupt Pin Register
Offset Address: 310C–310Fh Attribute: R/W
Default Value: 00214321h Size: 32-bit
Bit Description
31:28
PCI Express* #8 Pin (P8IP)—R/W. Indicates which pin the PCI Express* port #8
drives as its interrupt.
0h = No interrupt
1h = INTA#
2h = INTB# (Default)
3h = INTC#
4h = INTD#
5h–7h = Reserved
27:24
PCI Express #7 Pin (P7IP)—R/W. Indicates which pin the PCI Express port #7
drives as its interrupt.
0h = No interrupt
1h = INTA# (Default)
2h = INTB#
3h = INTC#
4h = INTD#
5h–7h = Reserved
23:20
PCI Express* #6 Pin (P6IP)—R/W. Indicates which pin the PCI Express* port #6
drives as its interrupt.
0h = No interrupt
1h = INTA#
2h = INTB# (Default)
3h = INTC#
4h = INTD#
5h–7h = Reserved
19:16
PCI Express #5 Pin (P5IP)—R/W. Indicates which pin the PCI Express port #5
drives as its interrupt.
0h = No interrupt
1h = INTA# (Default)
2h = INTB#
3h = INTC#
4h = INTD#
5h–7h = Reserved
15:12
PCI Express #4 Pin (P4IP)—R/W. Indicates which pin the PCI Express* port #4
drives as its interrupt.
0h = No interrupt
1h = INTA#
2h = INTB#
3h = INTC#
4h = INTD# (Default)
5h–7h = Reserved
11:8
PCI Express #3 Pin (P3IP)—R/W. Indicates which pin the PCI Express port #3
drives as its interrupt.
0h = No interrupt
1h = INTA#
2h = INTB#
3h = INTC# (Default)
4h = INTD#
5h–7h = Reserved
Datasheet 405
Chipset Configuration Registers
10.1.30 D27IP—Device 27 Interrupt Pin Register
Offset Address: 3110–3113h Attribute: R/W
Default Value: 00000001h Size: 32-bit
7:4
PCI Express #2 Pin (P2IP)—R/W. Indicates which pin the PCI Express port #2
drives as its interrupt.
0h = No interrupt
1h = INTA#
2h = INTB# (Default)
3h = INTC#
4h = INTD#
5h–7h = Reserved
3:0
PCI Express #1 Pin (P1IP)—R/W. Indicates which pin the PCI Express port #1
drives as its interrupt.
0h = No interrupt
1h = INTA# (Default)
2h = INTB#
3h = INTC#
4h = INTD#
5h–7h = Reserved
Bit Description
Bit Description
31:4 Reserved
3:0
Intel® High Definition Audio Pin (ZIP)—R/W. Indicates which pin the Intel® High
Definition Audio controller drives as its interrupt.
0h = No interrupt
1h = INTA# (Default)
2h = INTB#
3h = INTC#
4h = INTD#
5h–Fh = Reserved
Chipset Configuration Registers
406 Datasheet
10.1.31 D26IP—Device 26 Interrupt Pin Register
Offset Address: 3114–3117h Attribute: R/W
Default Value: 30000321h Size: 32-bit
10.1.32 D25IP—Device 25 Interrupt Pin Register
Offset Address: 3118–311Bh Attribute: R/W
Default Value: 00000001h Size: 32-bit
Bit Description
31:4 Reserved
3:0
EHCI #2 Pin (E2P)—R/W. Indicates which pin EHCI controller #2 drives as its
interrupt, if controller exists.
0h = No Interrupt
1h = INTA# (Default)
2h = INTB#
3h = INTC#
4h = INTD#
5h–Fh = Reserve
NOTE: EHCI Controller #2 is mapped to Device 26 Function 0 when RMH is enabled
and Device 26 function 7 when RMH is disabled.
Bit Description
31:4 Reserved
3:0
GBE LAN Pin (LIP)—R/W. Indicates which pin the internal GbE LAN controller drives
as its interrupt
0h = No Interrupt
1h = INTA# (Default)
2h = INTB#
3h = INTC#
4h = INTD#
5h–Fh = Reserved
Datasheet 407
Chipset Configuration Registers
10.1.33 D22IP—Device 22 Interrupt Pin Register
Offset Address: 3124–3127h Attribute: R/W
Default Value: 00000001h Size: 32-bit
10.1.34 D31IR—Device 31 Interrupt Route Register
Offset Address: 3140–3141h Attribute: R/W
Default Value: 3210h Size: 16-bit
Bit Description
31:16 Reserved
15:12
KT Pin (KTIP)—R/W. Indicates which pin the Keyboard text PCI functionality drives
as its interrupt
0h = No Interrupt
1h = INTA#
2h = INTB#
3h = INTC#
4h = INTD#
5h–Fh = Reserved
11:8
IDE-R Pin (IDERIP)—R/W. Indicates which pin the IDE Redirect PCI functionality
drives as its interrupt
0h = No Interrupt
1h = INTA#
2h = INTB#
3h = INTC#
4h = INTD#
5h–Fh = Reserved
7:4
Intel® MEI #2 Pin (MEI2IP)—R/W. Indicates which pin the Management Engine
Interface #2 drives as its interrupt
0h = No Interrupt
1h = INTA#
2h = INTB#
3h = INTC#
4h = INTD#
5h–Fh = Reserved
3:0
Intel® MEI #1 Pin (MEI1IP)—R/W. Indicates which pin the Management Engine
Interface controller #1 drives as its interrupt
0h = No Interrupt
1h = INTA#
2h = INTB#
3h = INTC#
4h = INTD#
5h–Fh = Reserved
Bit Description
15 Reserved
Chipset Configuration Registers
408 Datasheet
10.1.35 D30IR—Device 30 Interrupt Route Register
Offset Address: 3142–3143h Attribute: RO
Default Value: 0000h Size: 16-bit
14:12
Interrupt D Pin Route (IDR)—R/W. Indicates which physical pin on the PCH is
connected to the INTD# pin reported for device 31 functions.
0h = PIRQA#
1h = PIRQB#
2h = PIRQC#
3h = PIRQD# (Default)
4h = PIRQE#
5h = PIRQF#
6h = PIRQG#
7h = PIRQH#
11 Reserved
10:8
Interrupt C Pin Route (ICR)—R/W. Indicates which physical pin on the PCH is
connected to the INTC# pin reported for device 31 functions.
0h = PIRQA#
1h = PIRQB#
2h = PIRQC# (Default)
3h = PIRQD#
4h = PIRQE#
5h = PIRQF#
6h = PIRQG#
7h = PIRQH#
7 Reserved
6:4
Interrupt B Pin Route (IBR)—R/W. Indicates which physical pin on the PCH is
connected to the INTB# pin reported for device 31 functions.
0h = PIRQA#
1h = PIRQB# (Default)
2h = PIRQC#
3h = PIRQD#
4h = PIRQE#
5h = PIRQF#
6h = PIRQG#
7h = PIRQH#
3 Reserved
2:0
Interrupt A Pin Route (IAR)—R/W. Indicates which physical pin on the PCH is
connected to the INTA# pin reported for device 31 functions.
0h = PIRQA# (Default)
1h = PIRQB#
2h = PIRQC#
3h = PIRQD#
4h = PIRQE#
5h = PIRQF#
6h = PIRQG#
7h = PIRQH#
Bit Description
Bit Description
15:0 Reserved. No interrupts generated from Device 30.
Datasheet 409
Chipset Configuration Registers
10.1.36 D29IR—Device 29 Interrupt Route Register
Offset Address: 3144–3145h Attribute: R/W
Default Value: 3210h Size: 16-bit
Bit Description
15 Reserved
14:12
Interrupt D Pin Route (IDR)—R/W. Indicates which physical pin on the PCH is
connected to the INTD# pin reported for device 29 functions.
0h = PIRQA#
1h = PIRQB#
2h = PIRQC#
3h = PIRQD# (Default)
4h = PIRQE#
5h = PIRQF#
6h = PIRQG#
7h = PIRQH#
11 Reserved
10:8
Interrupt C Pin Route (ICR)—R/W. Indicates which physical pin on the PCH is
connected to the INTC# pin reported for device 29 functions.
0h = PIRQA#
1h = PIRQB#
2h = PIRQC# (Default)
3h = PIRQD#
4h = PIRQE#
5h = PIRQF#
6h = PIRQG#
7h = PIRQH#
7 Reserved
6:4
Interrupt B Pin Route (IBR)—R/W. Indicates which physical pin on the PCH is
connected to the INTB# pin reported for device 29 functions.
0h = PIRQA#
1h = PIRQB# (Default)
2h = PIRQC#
3h = PIRQD#
4h = PIRQE#
5h = PIRQF#
6h = PIRQG#
7h = PIRQH#
3 Reserved
2:0
Interrupt A Pin Route (IAR)—R/W. Indicates which physical pin on the PCH is
connected to the INTA# pin reported for device 29 functions.
0h = PIRQA# (Default)
1h = PIRQB#
2h = PIRQC#
3h = PIRQD#
4h = PIRQE#
5h = PIRQF#
6h = PIRQG#
7h = PIRQH#
Chipset Configuration Registers
410 Datasheet
10.1.37 D28IR—Device 28 Interrupt Route Register
Offset Address: 3146–3147h Attribute: R/W
Default Value: 3210h Size: 16-bit
Bit Description
15 Reserved
14:12
Interrupt D Pin Route (IDR)—R/W. Indicates which physical pin on the PCH is
connected to the INTD# pin reported for device 28 functions.
0h = PIRQA#
1h = PIRQB#
2h = PIRQC#
3h = PIRQD# (Default)
4h = PIRQE#
5h = PIRQF#
6h = PIRQG#
7h = PIRQH#
11 Reserved
10:8
Interrupt C Pin Route (ICR)—R/W. Indicates which physical pin on the PCH is
connected to the INTC# pin reported for device 28 functions.
0h = PIRQA#
1h = PIRQB#
2h = PIRQC# (Default)
3h = PIRQD#
4h = PIRQE#
5h = PIRQF#
6h = PIRQG#
7h = PIRQH#
7 Reserved
6:4
Interrupt B Pin Route (IBR)—R/W. Indicates which physical pin on the PCH is
connected to the INTB# pin reported for device 28 functions.
0h = PIRQA#
1h = PIRQB# (Default)
2h = PIRQC#
3h = PIRQD#
4h = PIRQE#
5h = PIRQF#
6h = PIRQG#
7h = PIRQH#
3 Reserved
2:0
Interrupt A Pin Route (IAR)—R/W. Indicates which physical pin on the PCH is
connected to the INTA# pin reported for device 28 functions.
0h = PIRQA# (Default)
1h = PIRQB#
2h = PIRQC#
3h = PIRQD#
4h = PIRQE#
5h = PIRQF#
6h = PIRQG#
7h = PIRQH#
Datasheet 411
Chipset Configuration Registers
10.1.38 D27IR—Device 27 Interrupt Route Register
Offset Address: 3148–3149h Attribute: R/W
Default Value: 3210h Size: 16-bit
Bit Description
15 Reserved
14:12
Interrupt D Pin Route (IDR)—R/W. Indicates which physical pin on the PCH is
connected to the INTD# pin reported for device 27 functions.
0h = PIRQA#
1h = PIRQB#
2h = PIRQC#
3h = PIRQD# (Default)
4h = PIRQE#
5h = PIRQF#
6h = PIRQG#
7h = PIRQH#
11 Reserved
10:8
Interrupt C Pin Route (ICR)—R/W. Indicates which physical pin on the PCH is
connected to the INTC# pin reported for device 27 functions.
0h = PIRQA#
1h = PIRQB#
2h = PIRQC# (Default)
3h = PIRQD#
4h = PIRQE#
5h = PIRQF#
6h = PIRQG#
7h = PIRQH#
7 Reserved
6:4
Interrupt B Pin Route (IBR)—R/W. Indicates which physical pin on the PCH is
connected to the INTB# pin reported for device 27 functions.
0h = PIRQA#
1h = PIRQB# (Default)
2h = PIRQC#
3h = PIRQD#
4h = PIRQE#
5h = PIRQF#
6h = PIRQG#
7h = PIRQH#
3 Reserved
2:0
Interrupt A Pin Route (IAR)—R/W. Indicates which physical pin on the PCH is
connected to the INTA# pin reported for device 27 functions.
0h = PIRQA# (Default)
1h = PIRQB#
2h = PIRQC#
3h = PIRQD#
4h = PIRQE#
5h = PIRQF#
6h = PIRQG#
7h = PIRQH#
Chipset Configuration Registers
412 Datasheet
10.1.39 D26IR—Device 26 Interrupt Route Register
Offset Address: 314C–314Fh Attribute: R/W
Default Value: 3210h Size: 16-bit
Bit Description
15 Reserved
14:12
Interrupt D Pin Route (IDR)—R/W. Indicates which physical pin on the PCH is
connected to the INTD# pin reported for device 26 functions:
0h = PIRQA#
1h = PIRQB#
2h = PIRQC#
3h = PIRQD# (Default)
4h = PIRQE#
5h = PIRQF#
6h = PIRQG#
7h = PIRQH#
11 Reserved
10:8
Interrupt C Pin Route (ICR)—R/W. Indicates which physical pin on the PCH is
connected to the INTC# pin reported for device 26 functions.
0h = PIRQA#
1h = PIRQB#
2h = PIRQC# (Default)
3h = PIRQD#
4h = PIRQE#
5h = PIRQF#
6h = PIRQG#
7h = PIRQH#
7 Reserved
6:4
Interrupt B Pin Route (IBR)—R/W. Indicates which physical pin on the PCH is
connected to the INTB# pin reported for device 26 functions.
0h = PIRQA#
1h = PIRQB# (Default)
2h = PIRQC#
3h = PIRQD#
4h = PIRQE#
5h = PIRQF#
6h = PIRQG#
7h = PIRQH#
3 Reserved
2:0
Interrupt A Pin Route (IAR)—R/W. Indicates which physical pin on the PCH is
connected to the INTA# pin reported for device 26 functions.
0h = PIRQA# (Default)
1h = PIRQB#
2h = PIRQC#
3h = PIRQD#
4h = PIRQE#
5h = PIRQF#
6h = PIRQG#
7h = PIRQH#
Datasheet 413
Chipset Configuration Registers
10.1.40 D25IR—Device 25 Interrupt Route Register
Offset Address: 3150–3151h Attribute: R/W
Default Value: 3210h Size: 16-bit
Bit Description
15 Reserved
14:12
Interrupt D Pin Route (IDR)—R/W. Indicates which physical pin on the PCH is
connected to the INTD# pin reported for device 25 functions:
0h = PIRQA#
1h = PIRQB#
2h = PIRQC#
3h = PIRQD# (Default)
4h = PIRQE#
5h = PIRQF#
6h = PIRQG#
7h = PIRQH#
11 Reserved
10:8
Interrupt C Pin Route (ICR)—R/W. Indicates which physical pin on the PCH is
connected to the INTC# pin reported for device 25 functions.
0h = PIRQA#
1h = PIRQB#
2h = PIRQC# (Default)
3h = PIRQD#
4h = PIRQE#
5h = PIRQF#
6h = PIRQG#
7h = PIRQH#
7 Reserved
6:4
Interrupt B Pin Route (IBR)—R/W. Indicates which physical pin on the PCH is
connected to the INTB# pin reported for device 25 functions.
0h = PIRQA#
1h = PIRQB# (Default)
2h = PIRQC#
3h = PIRQD#
4h = PIRQE#
5h = PIRQF#
6h = PIRQG#
7h = PIRQH#
3 Reserved
2:0
Interrupt A Pin Route (IAR)—R/W. Indicates which physical pin on the PCH is
connected to the INTA# pin reported for device 25 functions.
0h = PIRQA# (Default)
1h = PIRQB#
2h = PIRQC#
3h = PIRQD#
4h = PIRQE#
5h = PIRQF#
6h = PIRQG#
7h = PIRQH#
Chipset Configuration Registers
414 Datasheet
10.1.41 D24IR—Device 24 Interrupt Route Register
Offset Address: 3154–3155h Attribute: R/W
Default Value: 3210h Size: 16-bit
Bit Description
15 Reserved
14:12
Interrupt D Pin Route (IDR)—R/W. Indicates which physical pin on the PCH is
connected to the INTD# pin reported for device 24 functions:
0h = PIRQA#
1h = PIRQB#
2h = PIRQC#
3h = PIRQD# (Default)
4h = PIRQE#
5h = PIRQF#
6h = PIRQG#
7h = PIRQH#
11 Reserved
10:8
Interrupt C Pin Route (ICR)—R/W. Indicates which physical pin on the PCH is
connected to the INTC# pin reported for device 24 functions.
0h = PIRQA#
1h = PIRQB#
2h = PIRQC# (Default)
3h = PIRQD#
4h = PIRQE#
5h = PIRQF#
6h = PIRQG#
7h = PIRQH#
7 Reserved
6:4
Interrupt B Pin Route (IBR)—R/W. Indicates which physical pin on the PCH is
connected to the INTB# pin reported for device 24 functions.
0h = PIRQA#
1h = PIRQB# (Default)
2h = PIRQC#
3h = PIRQD#
4h = PIRQE#
5h = PIRQF#
6h = PIRQG#
7h = PIRQH#
3 Reserved
2:0
Interrupt A Pin Route (IAR)—R/W. Indicates which physical pin on the PCH is
connected to the INTA# pin reported for device 24 functions.
0h = PIRQA# (Default)
1h = PIRQB#
2h = PIRQC#
3h = PIRQD#
4h = PIRQE#
5h = PIRQF#
6h = PIRQG#
7h = PIRQH#
Datasheet 415
Chipset Configuration Registers
10.1.42 D22IR—Device 22 Interrupt Route Register
Offset Address: 315C–315Fh Attribute: R/W
Default Value: 3210h Size: 16-bit
Bit Description
15 Reserved
14:12
Interrupt D Pin Route (IDR)—R/W. Indicates which physical pin on the PCH is
connected to the INTD# pin reported for device 22 functions:
0h = PIRQA#
1h = PIRQB#
2h = PIRQC#
3h = PIRQD# (Default)
4h = PIRQE#
5h = PIRQF#
6h = PIRQG#
7h = PIRQH#
11 Reserved
10:8
Interrupt C Pin Route (ICR)—R/W. Indicates which physical pin on the PCH is
connected to the INTC# pin reported for device 22 functions.
0h = PIRQA#
1h = PIRQB#
2h = PIRQC# (Default)
3h = PIRQD#
4h = PIRQE#
5h = PIRQF#
6h = PIRQG#
7h = PIRQH#
7 Reserved
6:4
Interrupt B Pin Route (IBR)—R/W. Indicates which physical pin on the PCH is
connected to the INTB# pin reported for device 22 functions.
0h = PIRQA#
1h = PIRQB# (Default)
2h = PIRQC#
3h = PIRQD#
4h = PIRQE#
5h = PIRQF#
6h = PIRQG#
7h = PIRQH#
3 Reserved
2:0
Interrupt A Pin Route (IAR)—R/W. Indicates which physical pin on the PCH is
connected to the INTA# pin reported for device 22 functions.
0h = PIRQA# (Default)
1h = PIRQB#
2h = PIRQC#
3h = PIRQD#
4h = PIRQE#
5h = PIRQF#
6h = PIRQG#
7h = PIRQH#
Chipset Configuration Registers
416 Datasheet
10.1.43 OIC—Other Interrupt Control Register
Offset Address: 31FE–31FFh Attribute: R/W
Default Value: 0000h Size: 16-bit
NOTE: FEC10000h–FEC4FFFFh is allocated to PCIe when I/OxApic Enable (PAE) bit is set.
Bit Description
15:10 Reserved
9
Coprocessor Error Enable (CEN)—R/W.
0 = FERR# will not generate IRQ13 nor IGNNE#.
1 = If FERR# is low, the PCH generates IRQ13 internally and holds it until an I/O port
F0h write. It will also drive IGNNE# active.
8
APIC Enable (AEN)—R/W.
0 = The internal IOxAPIC is disabled.
1 = Enables the internal IOxAPIC and its address decode.
NOTE: Software should read this register after modifying APIC enable bit prior to
access to the IOxAPIC address range.
7:0
APIC Range Select (ASEL)—R/W.These bits define address bits 19:12 for the
IOxAPIC range. The default value of 00h enables compatibility with prior PCH products
as an initial value. This value must not be changed unless the IOxAPIC Enable bit is
cleared.
Datasheet 417
Chipset Configuration Registers
10.1.44 PRSTS—Power and Reset Status
Offset Address: 3310–3313h Attribute: RO, R/WC
Default Value: 02020000h Size: 32-bit
10.1.45 CIR7—Chipset Initalization Register 7
Offset Address: 3314–3317h Attribute: R/W
Default Value: 00000000h Size: 32-bit
Bit Description
31:16 Reserved
15 Power Management Watchdog Timer—R/WC. This bit is set when the Power
Management watchdog timer causes a global reset.
14:7 Reserved
6Intel® Management Engine Watchdog Timer Status—R/WC. This bit is set when
the Intel Management Engine watchdog timer causes a global reset.
5
Wake On Lan Override Wake Status (WOL_OVR_WK_STS)—R/WC. This bit
gets set when all of the following conditions are met:
Integrated LAN Signals a Power Management Event
The system is not in S0
The “WOL Enable Override” bit is set in configuration space.
BIOS can read this status bit to determine this wake source.
Software clears this bit by writing a 1 to it.
4 Reserved
3ME Host Power Down (ME_HOST_PWRDN)—R/WC.This bit is set when the Intel
Management Engine generates a host reset with power down.
2
ME Host Reset Warm Status (ME_HRST_WARM_STS)—R/WC. This bit is set
when the Intel® Management Engine generates a Host reset without power cycling.
Software clears this bit by writing a 1 to this bit position.
1
ME Host Reset Cold Status (ME_HRST_COLD_STS)—R/WC. This bit is set when
the Intel Management Engine generates a Host reset with power cycling. Software
clears this bit by writing a 1 to this bit position.
0
ME WAKE STATUS (ME_WAKE_STS)—R/WC. This bit is set when the Intel
Management Engine generates a Non-Maskable wake event, and is not affected by
any other enable bit. When this bit is set, the Host Power Management logic wakes to
S0.
Bit Description
31:4 Reserved
3:0 CIR7 Field 1—R/W. BIOS must program this field to 1111b.
Chipset Configuration Registers
418 Datasheet
10.1.46 CIR8—Chipset Initialization Register 8
Offset Address: 3324–3327h Attribute: R/W
Default Value: 00000000h Size: 32-bit
10.1.47 CIR9—Chipset Initialization Register 9
Offset Address: 3330–3333h Attribute: R/W
Default Value: 00000000h Size: 32-bit
10.1.48 CIR10—Chipset Initialization Register 10
Offset Address: 3340–3343h Attribute: R/W
Default Value: 00000000h Size: 32-bit
10.1.49 CIR13—Chipset Initialization Register 13
Offset Address: 3350–3353h Attribute: R/W
Default Value: 00000000h Size: 32-bit
10.1.50 CIR14—Chipset Initialization Register 14
Offset Address: 3368–336Bh Attribute: R/W
Default Value: 00000000h Size: 32-bit
Bit Description
31:0 CIR8 Field 1—R/W. BIOS must program this field to 04000000h.
Bit Description
31:0 CIR9 Field 1—R/W. BIOS must program this field to 00000000h.
Bit Description
31:0 CIR10 Field 1—R/W. BIOS must program this field to 00000000h for Intel® Core™
i5 processor-based systems.
Bit Description
31:0 CIR13 Field 1—R/W. BIOS must program this field to 000FFFFFh for Intel® Core™ i5
processorbased systems.
Bit Description
31:0 CIR14 Field 1—R/W. BIOS must program this field to 00061080h for Intel® Core™
i5 processor-based systems.
Datasheet 419
Chipset Configuration Registers
10.1.51 CIR15—Chipset Initialization Register 15
Offset Address: 3378–337Bh Attribute: R/W
Default Value: 00000000h Size: 32-bit
10.1.52 CIR16—Chipset Initialization Register 16
Offset Address: 3388–338Bh Attribute: R/W
Default Value: 00000000h Size: 32-bit
10.1.53 CIR17—Chipset Initialization Register 17
Offset Address: 33A0–33A3h Attribute: R/W
Default Value: 00000000h Size: 32-bit
10.1.54 CIR18—Chipset Initialization Register 18
Offset Address: 33A8–33ABh Attribute: R/W
Default Value: 00000000h Size: 32-bit
10.1.55 CIR19—Chipset Initialization Register 19
Offset Address: 33C0–33C3h Attribute: R/W
Default Value: 00000000h Size: 32-bit
Bit Description
31:0 CIR15 Field 1—R/W. BIOS must program this field to 00000000h for Intel® Core™
i5 processor-based systems.
Bit Description
31:0 CIR16 Field 1—R/W. BIOS must program this field to 7F8F9F80h for Intel® Core™
i5 processor-based systems.
Bit Description
31:0 CIR17 Field 1—R/W. BIOS must program this field to 00000000h for Intel® Core™
i5 processor-based systems.
Bit Description
31:0 CIR18 Field 1—R/W. BIOS must program this field to 00003900 for Intel® Core™ i5
processor-based systems.
Bit Description
31:0 CIR19 Field 1—R/W. BIOS must program this field to 00020002h for Intel® Core™
i5 processor-based systems.
Chipset Configuration Registers
420 Datasheet
10.1.56 CIR20—Chipset Initialization Register 20
Offset Address: 33CC–33CFh Attribute: R/W
Default Value: 00000000h Size: 32-bit
10.1.57 CIR21—Chipset Initialization Register 21
Offset Address: 33D0–33D3h Attribute: R/W
Default Value: 00000000h Size: 32-bit
10.1.58 CIR22—Chipset Initialization Register 22
Offset Address: 33D4–33D7h Attribute: R/W
Default Value: 00000000h Size: 32-bit
Bit Description
31:0 CIR20 Field 1—R/W. BIOS must program this field to 00044B00h for Intel® Core™
i5 processor-based systems.
Bit Description
31:0 CIR21 Field 1—R/W. BIOS must program this field to 00002000h for Intel® Core™
i5 processor-based systems.
Bit Description
31:0
CIR22 Field 1—R/W. BIOS must program this field to 00020000h for Intel® Core™
i5 processor-based systems.
Program this register after all registers in the 3330-33D3 range and D31:F0:A9h are
already programmed.
Datasheet 421
Chipset Configuration Registers
10.1.59 RC—RTC Configuration Register
Offset Address: 3400–3403h Attribute: R/W, R/WLO
Default Value: 00000000h Size: 32-bit
10.1.60 HPTC—High Precision Timer Configuration Register
Offset Address: 3404–3407h Attribute: R/W
Default Value: 00000000h Size: 32-bit
Bit Description
31:5 Reserved
4
Upper 128 Byte Lock (UL)—R/WLO.
0 = Bytes not locked.
1 = Bytes 38h–3Fh in the upper 128-byte bank of RTC RAM are locked and cannot be
accessed. Writes will be dropped and reads will not return any ensured data. Bit
reset on system reset.
3
Lower 128 Byte Lock (LL)—R/WLO.
0 = Bytes not locked.
1 = Bytes 38h–3Fh in the lower 128-byte bank of RTC RAM are locked and cannot be
accessed. Writes will be dropped and reads will not return any ensured data. Bit
reset on system reset.
2
Upper 128 Byte Enable (UE)—R/W.
0 = Bytes locked.
1 = The upper 128-byte bank of RTC RAM can be accessed.
1:0 Reserved
Bit Description
31:8 Reserved
7
Address Enable (AE)—R/W.
0 = Address disabled.
1 = The PCH will decode the High Precision Timer memory address range selected by
bits 1:0 below.
6:2 Reserved
1:0
Address Select (AS)—R/W. This 2-bit field selects 1 of 4 possible memory address
ranges for the High Precision Timer functionality. The encodings are:
00 = FED0_0000h–FED0_03FFh
01 = FED0_1000h–FED0_13FFh
10 = FED0_2000h–FED0_23FFh
11 = FED0_3000h–FED0_33FFh
Chipset Configuration Registers
422 Datasheet
10.1.61 GCS—General Control and Status Register
Offset Address: 3410–3413h Attribute: R/W, R/WLO
Default Value: 00000yy0h (yy = xx0000x0b)Size: 32-bit
Bit Description
31:13 Reserved
12
Function Level Reset Capability Structure Select (FLRCSSEL)—R/W.
0 = Function Level Reset (FLR) will use the standard capability structure with unique
capability ID assigned by PCISIG.
1 = Vendor Specific Capability Structure is selected for FLR.
11:10
Boot BIOS Straps (BBS)—R/W. This field determines the destination of accesses to
the BIOS memory range. The default values for these bits represent the strap values
of GNT1# /GPIO51 (bit 11) at the rising edge of PWROK and GNT0# (bit 10) at the
rising edge of PWROK.
When PCI is selected, the top 16 MB of memory below 4 GB (FF00_0000h to
FFFF_FFFFh) is accepted by the primary side of the PCI P2P bridge and forwarded to
the PCI bus. This allows systems with corrupted or unprogrammed flash to boot from
a PCI device. The PCI-to-PCI bridge Memory Space Enable bit does not need to be set
(nor any other bits) for these cycles to go to PCI. Note that BIOS decode range bits
and the other BIOS protection bits have no effect when PCI is selected. This
functionality is intended for debug/testing only.
When SPI or LPC is selected, the range that is decoded is further qualified by other
configuration bits described in the respective sections.
The value in this field can be overwritten by software as long as the BIOS Interface
Lock-Down (bit 0) is not set.
NOTE: Booting to PCI is intended for debug/testing only. Boot BIOS Destination
Select to LPC/PCI by functional strap or using Boot BIOS Destination Bit will
not affect SPI accesses initiated by Intel® Management Engine or Integrated
GbE LAN.
9
Server Error Reporting Mode (SERM)—R/W.
0 = The PCH is the final target of all errors. The Processor sends a messages to the
PCH for the purpose of generating NMI.
1 = The Processor is the final target of all errors from PCI Express* and DMI. In this
mode, if the PCH detects a fatal, non-fatal, or correctable error on DMI or its
downstream ports, it sends a message to the Processor. If the PCH receives an
ERR_* message from the downstream port, it sends that message to the
Processor.
8:7 Reserved
6
FERR# MUX Enable (FME)—R/W. This bit enables FERR# to be a processor break
event indication.
0 = Disabled.
1 = The PCH examines FERR# during a C2, C3, or C4 state as a break event.
See Chapter 5.13.4 for a functional description.
Bits 11:10 Description
00b LPC
01 RESERVED
10b PCI
11b SPI
Datasheet 423
Chipset Configuration Registers
5
No Reboot (NR)—R/W. This bit is set when the “No Reboot” strap (SPKR pin on the
PCH) is sampled high on PWROK. This bit may be set or cleared by software if the
strap is sampled low but may not override the strap when it indicates “No Reboot”.
0 = System will reboot upon the second timeout of the TCO timer.
1 = The TCO timer will count down and generate the SMI# on the first timeout, but
will not reboot on the second timeout.
4
Alternate Access Mode Enable (AME)—R/W.
0 = Disabled.
1 = Alternate access read only registers can be written, and write only registers can
be read. Before entering a low power state, several registers from powered down
parts may need to be saved. In the majority of cases, this is not an issue, as
registers have read and write paths. However, several of the ISA compatible
registers are either read only or write only. To get data out of write-only
registers, and to restore data into read-only registers, the PCH implements an
alternate access mode. For a list of these registers see Section 5.13.10.
3
Shutdown Policy Select (SPS)—R/W.
0 = PCH will drive INIT# in response to the shutdown Vendor Defined Message
(VDM). (default)
1 = PCH will treat the shutdown VDM similar to receiving a CF9h I/O write with data
value06h, and will drive PLTRST# active.
2
Reserved Page Route (RPR)—R/W. Determines where to send the reserved page
registers. These addresses are sent to PCI or LPC for the purpose of generating POST
codes. The I/O addresses modified by this field are: 80h, 84h, 85h, 86h, 88h, 8Ch,
8Dh, and 8Eh.
0 = Writes will be forwarded to LPC, shadowed within the PCH, and reads will be
returned from the internal shadow
1 = Writes will be forwarded to PCI, shadowed within the PCH, and reads will be
returned from the internal shadow.
NOTE: if some writes are done to LPC/PCI to these I/O ranges, and then this bit is
flipped, such that writes will now go to the other interface, the reads will not
return what was last written. Shadowing is performed on each interface.
The aliases for these registers, at 90h, 94h, 95h, 96h, 98h, 9Ch, 9Dh, and 9Eh, are
always decoded to LPC.
1 Reserved
0
BIOS Interface Lock-Down (BILD)—R/WLO.
0 = Disabled.
1 = Prevents BUC.TS (offset 3414, bit 0) and GCS.BBS (offset 3410h, bits 11:10)
from being changed. This bit can only be written from 0 to 1 once.
Bit Description
Chipset Configuration Registers
424 Datasheet
10.1.62 BUC—Backed Up Control Register
Offset Address: 3414–3414h Attribute: R/W
Default Value: 0000000xb Size: 8-bit
All bits in this register are in the RTC well and only cleared by RTCRST#
Bit Description
7:6 Reserved
5
LAN DisableR/W.
0 = LAN is Enabled
1 = LAN is Disabled.
Changing the internal GbE controller from disabled to enabled requires a system
reset (write of 0Eh to CF9h (RST_CNT Register)) immediately after clearing the LAN
disable bit. A reset is not required if changing the bit from enabled to disabled.
This bit is locked by the Function Disable SUS Well Lockdown register. Once locked
this bit can not be changed by software.
4
Daylight Savings Override (SDO)—R/W.
0 = Daylight Savings is Enabled.
1 = The DSE bit in RTC Register B is set to Read-only with a value of 0 to disable
daylight savings.
3:1 Reserved
0
Top Swap (TS)—R/W.
0 = PCH will not invert A16.
1 = PCH will invert A16, A17, or A18 for cycles going to the BIOS space .
If booting from LPC (FWH), then the boot-block size is 64 KB and A16 is inverted if
Top Swap is enabled.
If booting from SPI, then the BIOS Boot-Block size soft strap determines if A16, A17,
or A18 should be inverted if Top Swap is enabled.
If PCH is strapped for Top-Swap (GNT3#/GPIO55 is low at rising edge of PWROK),
then this bit cannot be cleared by software. The strap jumper should be removed and
the system rebooted.
Datasheet 425
Chipset Configuration Registers
10.1.63 FD—Function Disable Register
Offset Address: 3418–341Bh Attribute: R/W
Default Value: See bit description Size: 32-bit
When disabling a function, only the configuration space is disabled. Software must
ensure that all functionality within a controller that is not desired (such as memory
spaces, I/O spaces, and DMA engines) is disabled prior to disabling the function.
When a function is disabled, software must not attempt to re-enable it. A disabled
function can only be re-enabled by a platform reset.
Bit Description
31:26 Reserved
25
Serial ATA Disable 2 (SAD2)—R/W. Default is 0.
0 = The SATA controller #2 (D31:F5) is enabled.
1 = The SATA controller #2 (D31:F5) is disabled.
24
Thermal Sensor Registers Disable (TTD)—R/W. Default is 0.
0 = Thermal Sensor Registers (D31:F6) are enabled.
1 = Thermal Sensor Registers (D31:F6) are disabled.
23
PCI Express* 8 Disable (PE8D)—R/W. Default is 0. When disabled, the link for this
port is put into the “link down” state.
0 = PCI Express* port #8 is enabled.
1 = PCI Express port #8 is disabled.
22
PCI Express 7 Disable (PE7D)—R/W. Default is 0. When disabled, the link for this
port is put into the link down state.
0 = PCI Express port #7 is enabled.
1 = PCI Express port #7 is disabled.
21
PCI Express* 6 Disable (PE6D)—R/W. Default is 0. When disabled, the link for this
port is put into the “link down” state.
0 = PCI Express* port #6 is enabled.
1 = PCI Express port #6 is disabled.
20
PCI Express 5 Disable (PE5D)—R/W. Default is 0. When disabled, the link for this
port is put into the link down state.
0 = PCI Express port #5 is enabled.
1 = PCI Express port #5 is disabled.
19
PCI Express 4 Disable (PE4D)—R/W. Default is 0. When disabled, the link for this
port is put into the “link down” state.
0 = PCI Express port #4 is enabled.
1 = PCI Express port #4 is disabled.
NOTE: This bit must be set when Port 1 is configured as a x4.
18
PCI Express 3 Disable (PE3D)—R/W. Default is 0. When disabled, the link for this
port is put into the link down state.
0 = PCI Express port #3 is enabled.
1 = PCI Express port #3 is disabled.
NOTE: This bit must be set when Port 1 is configured as a x4.
17
PCI Express 2 Disable (PE2D)—R/W. Default is 0. When disabled, the link for this
port is put into the link down state.
0 = PCI Express port #2 is enabled.
1 = PCI Express port #2 is disabled.
NOTE: This bit must be set when Port 1 is configured as a x4 or a x2.
Chipset Configuration Registers
426 Datasheet
16
PCI Express 1 Disable (PE1D)—R/W. Default is 0. When disabled, the link for this
port is put into the link down state.
0 = PCI Express port #1 is enabled.
1 = PCI Express port #1 is disabled.
15
EHCI #1 Disable (EHCI1D)—R/W. Default is 0.
0 = The EHCI #1 is enabled.
1 = The EHCI #1 is disabled.
14
LPC Bridge Disable (LBD)—R/W. Default is 0.
0 = The LPC bridge is enabled.
1 = The LPC bridge is disabled. Unlike the other disables in this register, the following
additional spaces will no longer be decoded by the LPC bridge:
· Memory cycles below 16 MB (1000000h)
· I/O cycles below 64 KB (10000h)
· The Internal I/OxAPIC at FEC0_0000 to FECF_FFFF
Memory cycle in the LPC BIOS range below 4 GB will still be decoded when this bit is
set; however, the aliases at the top of 1 MB (the E and F segment) no longer will be
decoded.
13
EHCI #2 Disable (EHCI2D)—R/W. Default is 0.
0 = The EHCI #2 is enabled.
1 = The EHCI #2 is disabled.
12:5 Reserved
4
Intel® High Definition Audio Disable (HDAD)—R/W. Default is 0.
0 = The Intel® High Definition Audio controller is enabled.
1 = The Intel® High Definition Audio controller is disabled and its PCI configuration
space is not accessible.
3
SMBus Disable (SD)—R/W. Default is 0.
0 = The SMBus controller is enabled.
1 = The SMBus controller is disabled. Setting this bit only disables the PCI
configuration space.
2
Serial ATA Disable 1 (SAD1)—R/W. Default is 0.
0 = The SATA controller #1 (D31:F2) is enabled.
1 = The SATA controller #1 (D31:F2) is disabled.
1 Reserved
0 BIOS must set this bit to 1b.
Bit Description
Datasheet 427
Chipset Configuration Registers
10.1.64 CG—Clock Gating Register
Offset Address: 341C–341Fh Attribute: R/W
Default Value: 00000000h Size: 32-bit
Bit Description
31
Legacy (LPC) Dynamic Clock Gate Enable—R/W.
0 = Legacy Dynamic Clock Gating is Disabled
1 = Legacy Dynamic Clock Gating is Enabled
30 Reserved
29.28 CG Field 1—R/W. BIOS must program this field to 11b.
27
SATA Port 3 Dynamic Clock Gate Enable—R/W.
0 = SATA Port 3 Dynamic Clock Gating is Disabled
1 = SATA Port 3 Dynamic Clock Gating is Enabled
26
SATA Port 2 Dynamic Clock Gate Enable—R/W.
0 = SATA Port 2 Dynamic Clock Gating is Disabled
1 = SATA Port 2 Dynamic Clock Gating is Enabled
25
SATA Port 1 Dynamic Clock Gate Enable—R/W.
0 = SATA Port 1 Dynamic Clock Gating is Disabled
1 = SATA Port 1 Dynamic Clock Gating is Enabled
24
SATA Port 0 Dynamic Clock Gate Enable—R/W.
0 = SATA Port 0 Dynamic Clock Gating is Disabled
1 = SATA Port 0 Dynamic Clock Gating is Enabled
23
LAN Static Clock Gating Enable (LANSCGE)—R/W.
0 = LAN Static Clock Gating is Disabled
1 = LAN Static Clock Gating is Enabled when the LAN Disable bit is set in the Backed
Up Control RTC register.
22
High Definition Audio Dynamic Clock Gate EnableR/W.
0 = High Definition Audio Dynamic Clock Gating is Disabled
1 = High Definition Audio Dynamic Clock Gating is Enabled
21
High Definition Audio Static Clock Gate EnableR/W.
0 = High Definition Audio Static Clock Gating is Disabled
1 = High Definition Audio Static Clock Gating is Enabled
20
USB EHCI Static Clock Gate Enable—R/W.
0 = USB EHCI Static Clock Gating is Disabled
1 = USB EHCI Static Clock Gating is Enabled
19
USB EHCI Dynamic Clock Gate Enable—R/W.
0 = USB EHCI Dynamic Clock Gating is Disabled
1 = USB EHCI Dynamic Clock Gating is Enabled
18
SATA Port 5 Dynamic Clock Gate Enable—R/W.
0 = SATA Port 5 Dynamic Clock Gating is Disabled
1 = SATA Port 5 Dynamic Clock Gating is Enabled
17
SATA Port 4 Dynamic Clock Gate Enable—R/W.
0 = SATA Port 4 Dynamic Clock Gating is Disabled
1 = SATA Port 4 Dynamic Clock Gating is Enabled
16
PCI Dynamic Gate Enable—R/W.
0 = PCI Dynamic Gating is Disabled
1 = PCI Dynamic Gating is Enabled
15:6 Reserved
Chipset Configuration Registers
428 Datasheet
10.1.65 FDSW—Function Disable SUS Well Register
Offset Address: 3420h Attribute: R/W
Default Value: 00h Size: 8-bit
10.1.66 FD2—Function Disable 2 Register
Offset Address: 3428–342Bh Attribute: R/W
Default Value: 00000000h Size: 32-bit
5
SMBus Clock Gating Enable (SMBCGEN)—R/W.
0 = SMBus Clock Gating is Disabled.
1 = SMBus Clock Gating is Enabled.
4:1 Reserved
0
PCI Express Root Port Static Clock Gate Enable—R/W.
0 = PCI Express root port Static Clock Gating is Disabled
1 = PCI Express root port Static Clock Gating is Enabled
Bit Description
Bit Description
7
Function Disable SUS Well Lockdown (FDSWL)—R/W
0 = FDSW registers are not locked down
1 = FDSW registers are locked down
NOTE: This bit must be set when Intel® Active Management Technology is enabled.
6:0 Reserved
Bit Description
31:5 Reserved
4
KT Disable (KTD)R/W. Default is 0.
0 = Keyboard Text controller (D22:F3) is enabled.
1 = Keyboard Text controller (D22:F3) is Disabled
3
IDE-R Disable (IRERD)—R/W. Default is 0.
0 = IDE Redirect controller (D22:F2) is Enabled.
1 = IDE Redirect controller (D22:F2) is Disabled.
2
Intel® MEI #2 Disable (MEI2D)—R/W. Default is 0.
0 = Intel® MEI controller #2 (D22:F1) is enabled.
1 = Intel® MEI controller #2 (D22:F1) is disabled.
1
Intel® MEI #1 Disable (MEI1D)—R/W. Default is 0.
0 = Intel® MEI controller #1 (D22:F0) is enabled.
1 = Intel® MEI controller #1 (D22:F0) is disabled.
0 Reserved
Datasheet 429
Chipset Configuration Registers
10.1.67 MISCCTL—Miscellaneous Control Register
Offset Address: 3590–3593h Attribute: R/W
Default Value: 00000000h Size: 32-bit
This register is in the suspend well. This register is not reset on D3-to-D0, HCRESET
nor core well reset.
Bit Description
31:2 Reserved
1
EHCI 2 USBR Enable—R/W. When set, this bit enables support for the USB-r
redirect device on the EHCI controller in Device 26. SW must complete programming
the following registers before this bit is set:
1. Enable RMH
2. HCSPARAMS (N_CC, N_Ports)
0
EHCI 1 USBR Enable—R/W. When set, this bit enables support for the USB-r
redirect device on the EHCI controller in Device 29. SW must complete programming
the following registers before this bit is set:
1. Enable RMH
2. HCSPARAMS (N_CC, N_Ports)
Chipset Configuration Registers
430 Datasheet
10.1.68 USBOCM1—Overcurrent MAP Register 1
Offset Address: 35A0–35A3h Attribute: R/W0
Default Value: C0300C03h Size: 32-bit
All bits in this register are in the Resume Well and is only cleared by RSMRST#.
Bit Description
31:24
OC3 Mapping Each bit position maps OC3# to a set of ports as follows: The OC3#
pin is ganged to the overcurrent signal of each port that has its corresponding bit set.
It is software responsibility to ensure that a given port‘s bit map is set only for one
OC pin.
23:16
OC2 Mapping Each bit position maps OC2# to a set of ports as follows: The OC2#
pin is ganged to the overcurrent signal of each port that has its corresponding bit set.
It is software responsibility to ensure that a given port‘s bit map is set only for one
OC pin.
15:8
OC1 Mapping Each bit position maps OC1# to a set of ports as follows: The OC1#
pin is ganged to the overcurrent signal of each port that has its corresponding bit set.
It is software responsibility to ensure that a given port‘s bit map is set only for one
OC pin.
7:0
OC0 Mapping Each bit position maps OC0# to a set of ports as follows: The OC0#
pin is ganged to the overcurrent signal of each port that has its corresponding bit set.
It is software responsibility to ensure that a given port‘s bit map is set only for one
OC pin.
Bit 31 30 29 28 27 26 25 24
Port 76543210
Bit 23 22 21 20 19 18 17 16
Port 76543210
Bit 15 14 13 12 11 10 9 8
Port 76543210
Bit 76543210
Port 76543210
Datasheet 431
Chipset Configuration Registers
10.1.69 USBOCM2—Overcurrent MAP Register 2
Offset Address: 35A4–35A7h Attribute: R/W0
Default Value: 00h Size: 32-bit
All bits in this register are in the Resume Well and is only cleared by RSMRST#
Bit Description
31:30 Reserved
29:24
OC7 Mapping Each bit position maps OC7# to a set of ports as follows: The OC7#
pin is ganged to the overcurrent signal of each port that has its corresponding bit set.
It is software responsibility to ensure that a given port‘s bit map is set only for one
OC pin.
23:22 Reserved
21:16
OC6 Mapping Each bit position maps OC6# to a set of ports as follows: The OC6#
pin is ganged to the overcurrent signal of each port that has its corresponding bit set.
It is software responsibility to ensure that a given port‘s bit map is set only for one
OC pin.
15:14 Reserved
13:8
OC5 Mapping Each bit position maps OC5# to a set of ports as follows: The OC5#
pin is ganged to the overcurrent signal of each port that has its corresponding bit set.
It is software responsibility to ensure that a given port‘s bit map is set only for one
OC pin.
7:6 Reserved
5:0
OC4 Mapping Each bit position maps OC4# to a set of ports as follows: The OC4#
pin is ganged to the overcurrent signal of each port that has its corresponding bit set.
It is software responsibility to ensure that a given port‘s bit map is set only for one
OC pin.
Bit 29 28 27 26 25 24
Port 13 12 11 10 9 8
Bit 21 20 19 18 17 16
Port 13 12 11 10 9 8
Bit 13 12 11 10 9 8
Port 13 12 11 10 9 8
Bit 543210
Port 13 12 11 10 9 8
Chipset Configuration Registers
432 Datasheet
10.1.70 RMHWKCTL—Rate Matching Hub Wake Control Register
Offset Address: 35B0–35B3h Attribute: R/W
Default Value: 00000000h Size: 32-bit
All bits in this register are in the Resume Well and is only cleared by RSMRST#.
Bit Description
31:10 Reserved
9
RMH 2 Inherit EHCI2 Wake Control Settings: When this bit is set, the RMH
behaves as if bits 6:4 of this register reflect the appropriate bits of EHCI PORTSC0
bits 22:20.
8
RMH 1 Inherit EHCI1 Wake Control Settings: When this bit is set, the RMH
behaves as if bits 2:0 of this register reflect the appropriate bits of EHCI PORTSC0
bits 22:20.
7
RMH 2 Upstream Wake on Device Resume This bit governs the hub behavior
when globally suspended and the system is in Sx.
0 = Enables the port to be sensitive to device initiated resume events as system
wake-up events. That is, the hub will initiate a resume on its upstream port and
cause a wake from Sx when a device resume occurs on an enabled DS port
1 = Device resume event is seen on a downstream port, the hub does not initiate a
wake upstream and does not cause a wake from Sx
6
RMH 2 Upstream Wake on OC Disable This bit governs the hub behavior when
globally suspended and the system is in Sx.
0 = Enables the port to be sensitive to over-current conditions as system wake-up
events. That is, the hub will initiate a resume on its upstream port and cause a
wake from Sx when an OC condition occurs on an enabled DS port
1 = Over-current event does not initiate a wake upstream and does not cause a wake
from Sx
5
RMH 2 Upstream Wake on Disconnect Disable This bit governs the hub behavior
when globally suspended and the system is in Sx
0 = Enables disconnect events on downstream port to be treated as resume events
to be propagated upstream. In this case, it is allowed to initiate a wake on its
upstream port and cause a system wake from Sx in response to a disconnect
event on a downstream port
1 = Downstream disconnect events do not initiate a resume on its upstream port or
cause a resume from Sx.
4
RMH 2 Upstream Wake on Connect Enable This bit governs the hub behavior
when globally suspended and the system is in Sx.
0 = Enables connect events on a downstream port to be treated as resume events to
be propagated upstream. As well as waking up the system from Sx.
1 = Downstream connect events do not wake the system from Sx nor does it initiate
a resume on its upstream port.
3
RMH 1 Upstream Wake on Device Resume This bit governs the hub behavior
when globally suspended and the system is in Sx.
0 = Enables the port to be sensitive to device initiated resume events as system
wake-up events. That is, the hub will initiate a resume on its upstream port and
cause a wake from Sx when a device resume occurs on an enabled DS port
1 = Device resume event is seen on a downstream port, the hub does not initiate a
wake upstream and does not cause a wake from Sx
Datasheet 433
Chipset Configuration Registers
§ §
2
RMH 1 Upstream Wake on OC Disable This bit governs the hub behavior when
globally suspended and the system is in Sx.
0 = Enables the port to be sensitive to over-current conditions as system wake-up
events. That is, the hub will initiate a resume on its upstream port and cause a
wake from Sx when an OC condition occurs on an enabled DS port
1 = Over-current event does not initiate a wake upstream and does not cause a wake
from Sx
1
RMH 1 Upstream Wake on Disconnect Disable This bit governs the hub behavior
when globally suspended and the system is in Sx
0 = Enables disconnect events on downstream port to be treated as resume events
to be propagated upstream. In this case, it is allowed to initiate a wake on its
upstream port and cause a system wake from Sx in response to a disconnect
event on a downstream port
1 = Downstream disconnect events do not initiate a resume on its upstream port or
cause a resume from Sx.
0
RMH 1 Upstream Wake on Connect Enable This bit governs the hub behavior
when globally suspended and the system is in Sx.
0 = Enables connect events on a downstream port to be treated as resume events to
be propagated upstream. As well as waking up the system from Sx.
1 = Downstream connect events do not wake the system from Sx nor does it initiate
a resume on its upstream port.
Bit Description
Chipset Configuration Registers
434 Datasheet
Datasheet 435
PCI-to-PCI Bridge Registers (D30:F0)
11 PCI-to-PCI Bridge Registers
(D30:F0)
The PCH PCI bridge resides in PCI Device 30, Function 0 on bus #0. This implements
the buffering and control logic between PCI and the backbone. The arbitration for the
PCI bus is handled by this PCI device.
11.1 PCI Configuration Registers (D30:F0)
Note: Address locations that are not shown should be treated as Reserved (see Section 9.2
for details).
.
Table 11-1. PCI Bridge Register Address Map (PCI-PCI—D30:F0)
Offset Mnemonic Register Name Default Type
00h–01h VID Vendor Identification 8086h RO
02h–03h DID Device Identification See register
description RO
04h–05h PCICMD PCI Command 0000h R/W, RO
06h–07h PSTS PCI Status 0010h R/WC, RO
08h RID Revision Identification See register
description RO
09h–0Bh CC Class Code 060401h RO
0Dh PMLT Primary Master Latency Timer 00h RO
0Eh HEADTYP Header Type 01h RO
18h–1Ah BNUM Bus Number 000000h RO
1Bh SMLT Secondary Master Latency Timer 00h R/W
1Ch–1Dh IOBASE_LIMIT I/O Base and Limit 0000h R/W, RO
1Eh–1Fh SECSTS Secondary Status 0280h R/WC, RO
20h–23h MEMBASE_
LIMIT Memory Base and Limit 00000000h R/W
24h–27h PREF_MEM_
BASE_LIMIT Prefetchable Memory Base and Limit 00010001h R/W, RO
28h–2Bh PMBU32 Prefetchable Memory Upper 32 Bits 00000000h R/W
2Ch–2Fh PMLU32 Prefetchable Memory Limit Upper 32
Bits 00000000h R/W
34h CAPP Capability List Pointer 50h RO
3Ch–3Dh INTR Interrupt Information 0000h R/W, RO
3Eh–3Fh BCTRL Bridge Control 0000h R/WC, RO,
R/W
40h–41h SPDH Secondary PCI Device Hiding 0000h R/W, RO
44h–47h DTC Delayed Transaction Control 00000000h R/W
48h–4Bh BPS Bridge Proprietary Status 00000000h R/WC, RO
4Ch–4Fh BPC Bridge Policy Configuration 00001200h R/W RO
50–51h SVCAP Subsystem Vendor Capability Pointer 000Dh RO
54h–57h SVID Subsystem Vendor IDs 00000000 R/WO
PCI-to-PCI Bridge Registers (D30:F0)
436 Datasheet
11.1.1 VID—Vendor Identification Register (PCI-PCI—D30:F0)
Offset Address: 00h–01h Attribute: RO
Default Value: 8086h Size: 16 bits
11.1.2 DID—Device Identification Register (PCI-PCI—D30:F0)
Offset Address: 02h–03h Attribute: RO
Default Value: See bit description Size: 16 bits
11.1.3 PCICMD—PCI Command Register (PCI-PCI—D30:F0)
Offset Address: 04h05h Attribute: R/W, RO
Default Value: 0000h Size: 16 bits
Bit Description
15:0 Vendor ID—RO. This is a 16-bit value assigned to Intel. Intel VID = 8086h.
Bit Description
15:0
Device IDRO. This is a 16-bit value assigned to the PCI bridge. See the Intel® 5
Series Chipset and Intel® 3400 Series Chipset Specification Update for the value of
the Device ID Register.
Bit Description
15:11 Reserved
10 Interrupt Disable (ID)—RO. Hardwired to 0. The PCI bridge has no interrupts to disable
9Fast Back to Back Enable (FBE)—RO. Hardwired to 0, per the PCI Express* Base
Specification, Revision 1.0a.
8
SERR# Enable (SERR_EN)—R/W.
0 = Disable.
1 = Enable the PCH to generate an NMI (or SMI# if NMI routed to SMI#) when the
D30:F0 SSE bit (offset 06h, bit 14) is set.
7Wait Cycle Control (WCC)—RO. Hardwired to 0, per the PCI Express* Base
Specification, Revision 1.0a.
6
Parity Error Response (PER)—R/W.
0 = The PCH ignores parity errors on the PCI bridge.
1 = The PCH will set the SSE bit (D30:F0, offset 06h, bit 14) when parity errors are
detected on the PCI bridge.
5VGA Palette Snoop (VPS)—RO. Hardwired to 0, per the PCI Express* Base
Specification, Revision 1.0a.
4Memory Write and Invalidate Enable (MWE)—RO. Hardwired to 0, per the PCI Express*
Base Specification, Revision 1.0a
3Special Cycle Enable (SCE)—RO. Hardwired to 0, per the PCI Express* Base
Specification, Revision 1.0a and the PCI- to-PCI Bridge Specification.
Datasheet 437
PCI-to-PCI Bridge Registers (D30:F0)
11.1.4 PSTS—PCI Status Register (PCI-PCI—D30:F0)
Offset Address: 06h07h Attribute: R/WC, RO
Default Value: 0010h Size: 16 bits
Note: For the writable bits, software must write a 1 to clear bits that are set. Writing a 0 to
the bit has no effect.
2
Bus Master Enable (BME)—R/W.
0 = Disable
1 = Enable. Allows the PCI-to-PCI bridge to accept cycles from PCI.
1
Memory Space Enable (MSE)—R/W. Controls the response as a target for memory
cycles targeting PCI.
0 = Disable
1 = Enable
0
I/O Space Enable (IOSE)—R/W. Controls the response as a target for I/O cycles
targeting PCI.
0 = Disable
1 = Enable
Bit Description
Bit Description
15
Detected Parity Error (DPE)—R/WC.
0 = Parity error Not detected.
1 = Indicates that the PCH detected a parity error on the internal backbone. This bit gets
set even if the Parity Error Response bit (D30:F0:04 bit 6) is not set.
PCI-to-PCI Bridge Registers (D30:F0)
438 Datasheet
14
Signaled System Error (SSE)—R/WC. Several internal and external sources of the
bridge can cause SERR#. The first class of errors is parity errors related to the
backbone. The PCI bridge captures generic data parity errors (errors it finds on the
backbone) as well as errors returned on backbone cycles where the bridge was the
master. If either of these two conditions is met, and the primary side of the bridge is
enabled for parity error response, SERR# will be captured as shown below.
As with the backbone, the PCI bus captures the same sets of errors. The PCI bridge
captures generic data parity errors (errors it finds on PCI) as well as errors returned on
PCI cycles where the bridge was the master. If either of these two conditions is met, and
the secondary side of the bridge is enabled for parity error response, SERR# will be
captured as shown below.
The final class of errors is system bus errors. There are three status bits associated with
system bus errors, each with a corresponding enable. The diagram capturing this is
shown below.
After checking for the three above classes of errors, an SERR# is generated, and
PSTS.SSE logs the generation of SERR#, if CMD.SEE (D30:F0:04, bit 8) is set, as shown
below.
13
Received Master Abort (RMA)—R/WC.
0 = No master abort received.
1 = Set when the bridge receives a master abort status from the backbone.
12
Received Target Abort (RTA)—R/WC.
0 = No target abort received.
1 = Set when the bridge receives a target abort status from the backbone.
Bit Description
Datasheet 439
PCI-to-PCI Bridge Registers (D30:F0)
11.1.5 RID—Revision Identification Register (PCI-PCI—D30:F0)
Offset Address: 08h Attribute: RO
Default Value: See bit description Size: 8 bits
11.1.6 CC—Class Code Register (PCI-PCI—D30:F0)
Offset Address: 09h–0Bh Attribute: RO
Default Value: 060401h Size: 24 bits
11
Signaled Target Abort (STA)—R/WC.
0 = No signaled target abort
1 = Set when the bridge generates a completion packet with target abort status on the
backbone.
10:9 Reserved
8
Data Parity Error Detected (DPD)—R/WC.
0 = Data parity error Not detected.
1 = Set when the bridge receives a completion packet from the backbone from a
previous request, and detects a parity error, and CMD.PERE is set (D30:F0:04 bit 6).
7:5 Reserved
4Capabilities List (CLIST)—RO. Hardwired to 1. Capability list exist on the PCI bridge.
3Interrupt Status (IS)—RO. Hardwired to 0. The PCI bridge does not generate
interrupts.
2:0 Reserved
Bit Description
Bit Description
7:0 Revision ID—RO. See the Intel® 5 Series Chipset and Intel® 3400 Series Chipset
Specification Update for the value of the Revision ID Register
Bit Description
23:16 Base Class Code (BCC)—RO. Hardwired to 06h. Indicates this is a bridge device.
15:8 Sub Class Code (SCC)—RO. Hardwired to 04h. Indicates this device is a PCI-to-PCI
bridge.
7:0 Programming Interface (PI)—RO. Hardwired to 01h. Indicates the bridge is
subtractive decode
PCI-to-PCI Bridge Registers (D30:F0)
440 Datasheet
11.1.7 PMLT—Primary Master Latency Timer Register
(PCI-PCI—D30:F0)
Offset Address: 0Dh Attribute: RO
Default Value: 00h Size: 8 bits
11.1.8 HEADTYP—Header Type Register (PCI-PCI—D30:F0)
Offset Address: 0Eh Attribute: RO
Default Value: 01h Size: 8 bits
11.1.9 BNUM—Bus Number Register (PCI-PCI—D30:F0)
Offset Address: 18h–1Ah Attribute: R/W
Default Value: 000000h Size: 24 bits
Bit Description
7:3 Master Latency Timer Count (MLTC)—RO. Reserved per the PCI Express* Base
Specification, Revision 1.0a.
2:0 Reserved
Bit Description
7Multi-Function Device (MFD)—RO. A 0 indicates a single function device
6:0 Header Type (HTYPE)—RO. This 7-bit field identifies the header layout of the
configuration space, which is a PCI-to-PCI bridge in this case.
Bit Description
23:16 Subordinate Bus Number (SBBN)—R/W. Indicates the highest PCI bus number
below the bridge.
15:8 Secondary Bus Number (SCBN)—R/W. Indicates the bus number of PCI.
7:0
Primary Bus Number (PBN)—R/W. This field is default to 00h. In a multiple-PCH
system, programmable PBN allows an PCH to be located on any bus. System
configuration software is responsible for initializing these registers to appropriate
values. PBN is not used by hardware in determining its bus number.
Datasheet 441
PCI-to-PCI Bridge Registers (D30:F0)
11.1.10 SMLT—Secondary Master Latency Timer Register
(PCI-PCI—D30:F0)
Offset Address: 1Bh Attribute: R/W
Default Value: 00h Size: 8 bits
This timer controls the amount of time the PCH PCI-to-PCI bridge will burst data on its
secondary interface. The counter starts counting down from the assertion of FRAME#.
If the grant is removed, then the expiration of this counter will result in the de-
assertion of FRAME#. If the grant has not been removed, then the PCH PCI-to-PCI
bridge may continue ownership of the bus.
11.1.11 IOBASE_LIMIT—I/O Base and Limit Register
(PCI-PCI—D30:F0)
Offset Address: 1Ch–1Dh Attribute: R/W, RO
Default Value: 0000h Size: 16 bits
Bit Description
7:3 Master Latency Timer Count (MLTC)—R/W. This 5-bit field indicates the number of
PCI clocks, in 8-clock increments, that the PCH remains as master of the bus.
2:0 Reserved
Bit Description
15:12 I/O Limit Address Limit bits[15:12]—R/W. I/O Base bits corresponding to address
lines 15:12 for 4-KB alignment. Bits 11:0 are assumed to be padded to FFFh.
11:8 I/O Limit Address Capability (IOLC)—RO. Indicates that the bridge does not
support 32-bit I/O addressing.
7:4 I/O Base Address (IOBA)—R/W. I/O Base bits corresponding to address lines 15:12
for 4-KB alignment. Bits 11:0 are assumed to be padded to 000h.
3:0 I/O Base Address Capability (IOBC)—RO. Indicates that the bridge does not
support 32-bit I/O addressing.
PCI-to-PCI Bridge Registers (D30:F0)
442 Datasheet
11.1.12 SECSTS—Secondary Status Register (PCI-PCI—D30:F0)
Offset Address: 1Eh1Fh Attribute: R/WC, RO
Default Value: 0280h Size: 16 bits
Note: For the writable bits, software must write a 1 to clear bits that are set. Writing a 0 to
the bit has no effect.
Bit Description
15
Detected Parity Error (DPE)—R/WC.
0 = Parity error not detected.
1 = PCH PCI bridge detected an address or data parity error on the PCI bus
14
Received System Error (RSE)—R/WC.
0 = SERR# assertion not received
1 = SERR# assertion is received on PCI.
13
Received Master Abort (RMA)—R/WC.
0 = No master abort.
1 = This bit is set whenever the bridge is acting as an initiator on the PCI bus and the
cycle is master-aborted. For Processor/PCH interface packets that have completion
required, this must also cause a target abort to be returned and sets PSTS.STA.
(D30:F0:06 bit 11)
12
Received Target Abort (RTA)—R/WC.
0 = No target abort.
1 = This bit is set whenever the bridge is acting as an initiator on PCI and a cycle is
target-aborted on PCI. For Processor/PCH interface packets that have completion
required, this event must also cause a target abort to be returned, and sets
PSTS.STA. (D30:F0:06 bit 11).
11
Signaled Target Abort (STA)—R/WC.
0 = No target abort.
1 = This bit is set when the bridge is acting as a target on the PCI Bus and signals a
target abort.
10:9 DEVSEL# Timing (DEVT)RO.
01h = Medium decode timing.
8
Data Parity Error Detected (DPD)—R/WC.
0 = Conditions described below not met.
1 = The PCH sets this bit when all of the following three conditions are met:
The bridge is the initiator on PCI.
PERR# is detected asserted or a parity error is detected internally
BCTRL.PERE (D30:F0:3E bit 0) is set.
7Fast Back to Back Capable (FBC)—RO. Hardwired to 1 to indicate that the PCI to PCI
target logic is capable of receiving fast back-to-back cycles.
6 Reserved
566 MHz Capable (66MHZ_CAP)—RO. Hardwired to 0. This bridge is 33 MHz capable
only.
4:0 Reserved
Datasheet 443
PCI-to-PCI Bridge Registers (D30:F0)
11.1.13 MEMBASE_LIMIT—Memory Base and Limit Register
(PCI-PCI—D30:F0)
Offset Address: 20h–23h Attribute: R/W
Default Value: 00000000h Size: 32 bits
This register defines the base and limit, aligned to a 1-MB boundary, of the non-
prefetchable memory area of the bridge. Accesses that are within the ranges specified
in this register will be sent to PCI if CMD.MSE is set. Accesses from PCI that are outside
the ranges specified will be accepted by the bridge if CMD.BME is set.
11.1.14 PREF_MEM_BASE_LIMIT—Prefetchable Memory Base
and Limit Register (PCI-PCI—D30:F0)
Offset Address: 24h–27h Attribute: R/W, RO
Default Value: 00010001h Size: 32-bit
Defines the base and limit, aligned to a 1-MB boundary, of the prefetchable memory
area of the bridge. Accesses that are within the ranges specified in this register will be
sent to PCI if CMD.MSE is set. Accesses from PCI that are outside the ranges specified
will be accepted by the bridge if CMD.BME is set.
Bit Description
31:20
Memory Limit (ML)—R/W. These bits are compared with bits 31:20 of the incoming
address to determine the upper 1-MB aligned value (exclusive) of the range. The
incoming address must be less than this value.
19:16 Reserved
15:4
Memory Base (MB)—R/W. These bits are compared with bits 31:20 of the incoming
address to determine the lower 1-MB aligned value (inclusive) of the range. The
incoming address must be greater than or equal to this value.
3:0 Reserved
Bit Description
31:20
Prefetchable Memory Limit (PML)—R/W. These bits are compared with bits 31:20 of
the incoming address to determine the upper 1-MB aligned value (exclusive) of the
range. The incoming address must be less than this value.
19:16 64-bit Indicator (I64L)RO. Indicates support for 64-bit addressing.
15:4
Prefetchable Memory Base (PMB)—R/W. These bits are compared with bits 31:20 of
the incoming address to determine the lower 1-MB aligned value (inclusive) of the
range. The incoming address must be greater than or equal to this value.
3:0 64-bit Indicator (I64B)RO. Indicates support for 64-bit addressing.
PCI-to-PCI Bridge Registers (D30:F0)
444 Datasheet
11.1.15 PMBU32—Prefetchable Memory Base Upper 32 Bits
Register (PCI-PCI—D30:F0)
Offset Address: 28h–2Bh Attribute: R/W
Default Value: 00000000h Size: 32 bits
11.1.16 PMLU32—Prefetchable Memory Limit Upper 32 Bits
Register (PCI-PCI—D30:F0)
Offset Address: 2C–2Fh Attribute: R/W
Default Value: 00000000h Size: 32 bits
11.1.17 CAPP—Capability List Pointer Register (PCI-PCI—D30:F0)
Offset Address: 34h Attribute: RO
Default Value: 50h Size: 8 bits
11.1.18 INTR—Interrupt Information Register (PCI-PCI—D30:F0)
Offset Address: 3Ch3Dh Attribute: R/W, RO
Default Value: 0000h Size: 16 bits
Bit Description
31:0 Prefetchable Memory Base Upper Portion (PMBU)—R/W. Upper 32-bits of the
prefetchable address base.
Bit Description
31:0 Prefetchable Memory Limit Upper Portion (PMLU)R/W. Upper 32-bits of the
prefetchable address limit.
Bit Description
7:0 Capabilities Pointer (PTR)—RO. Indicates that the pointer for the first entry in the
capabilities list is at 50h in configuration space.
Bit Description
15:8 Interrupt Pin (IPIN)—RO. The PCI bridge does not assert an interrupt.
7:0
Interrupt Line (ILINE)—R/W. Software written value to indicate which interrupt line
(vector) the interrupt is connected to. No hardware action is taken on this register.
Since the bridge does not generate an interrupt, BIOS should program this value to FFh
as per the PCI bridge specification.
Datasheet 445
PCI-to-PCI Bridge Registers (D30:F0)
11.1.19 BCTRL—Bridge Control Register (PCI-PCI—D30:F0)
Offset Address: 3Eh3Fh Attribute: R/WC, RO, R/W
Default Value: 0000h Size: 16 bits
Bit Description
15:12 Reserved
11
Discard Timer SERR# Enable (DTE)—R/W. Controls the generation of SERR# on the
primary interface in response to the DTS bit being set:
0 = Do not generate SERR# on a secondary timer discard
1 = Generate SERR# in response to a secondary timer discard
10 Discard Timer Status (DTS)—R/WC. This bit is set to 1 when the secondary discard
timer (see the SDT bit below) expires for a delayed transaction in the hard state.
9
Secondary Discard Timer (SDT)—R/W. This bit sets the maximum number of PCI
clock cycles that the PCH waits for an initiator on PCI to repeat a delayed transaction
request. The counter starts once the delayed transaction data is has been returned by
the system and is in a buffer in the PCH PCI bridge. If the master has not repeated the
transaction at least once before the counter expires, the PCH PCI bridge discards the
transaction from its queue.
0 = The PCI master timeout value is between 215 and 216 PCI clocks
1 = The PCI master timeout value is between 210 and 211 PCI clocks
8Primary Discard Timer (PDT)—R/W. This bit is R/W for software compatibility only.
7Fast Back to Back Enable (FBE)—RO. Hardwired to 0. The PCI logic will not generate
fast back-to-back cycles on the PCI bus.
6
Secondary Bus Reset (SBR)—R/W. Controls PCIRST# assertion on PCI.
0 = Bridge de-asserts PCIRST#
1 = Bridge asserts PCIRST#. When PCIRST# is asserted, the delayed transaction
buffers, posting buffers, and the PCI bus are initialized back to reset conditions.
The rest of the part and the configuration registers are not affected.
5
Master Abort Mode (MAM)—R/W. Controls the PCH PCI bridge’s behavior when a
master abort occurs:
Master Abort on Processor /PCH Interconnect (DMI):
0 = Bridge asserts TRDY# on PCI. It drives all 1s for reads, and discards data on writes.
1 = Bridge returns a target abort on PCI.
Master Abort PCI (non-locked cycles):
0 = Normal completion status will be returned on the Processor/PCH interconnect.
1 = Target abort completion status will be returned on the Processor/PCH interconnect.
NOTE: All locked reads will return a completer abort completion status on the
Processor/PCH interconnect.
4
VGA 16-Bit Decode (V16D)—R/W. Enables the PCH PCI bridge to provide 16-bits
decoding of VGA I/O address precluding the decode of VGA alias addresses every 1 KB.
This bit requires the VGAE bit in this register be set.
PCI-to-PCI Bridge Registers (D30:F0)
446 Datasheet
3
VGA Enable (VGAE)—R/W. When set to a 1, the PCH PCI bridge forwards the
following transactions to PCI regardless of the value of the I/O base and limit registers.
The transactions are qualified by CMD.MSE (D30:F0:04 bit 1) and CMD.IOSE
(D30:F0:04 bit 0) being set.
Memory addresses: 000A0000h–000BFFFFh
I/O addresses: 3B0h–3BBh and 3C0h–3DFh. For the I/O addresses, bits [63:16] of
the address must be 0, and bits [15:10] of the address are ignored (that is,
aliased).
The same holds true from secondary accesses to the primary interface in reverse. That
is, when the bit is 0, memory and I/O addresses on the secondary interface between
the above ranges will be claimed.
2
ISA Enable (IE)—R/W. This bit only applies to I/O addresses that are enabled by the
I/O Base and I/O Limit registers and are in the first 64 KB of PCI I/O space. If this bit is
set, the PCH PCI bridge will block any forwarding from primary to secondary of I/O
transactions addressing the last 768 bytes in each 1-KB block (offsets 100h to 3FFh).
1
SERR# Enable (SEE)—R/W. Controls the forwarding of secondary interface SERR#
assertions on the primary interface. When set, the PCI bridge will forward SERR# pin.
SERR# is asserted on the secondary interface.
This bit is set.
CMD.SEE (D30:F0:04 bit 8) is set.
0
Parity Error Response Enable (PERE)—R/W.
0 = Disable
1 = The PCH PCI bridge is enabled for parity error reporting based on parity errors on
the PCI bus.
Bit Description
Datasheet 447
PCI-to-PCI Bridge Registers (D30:F0)
11.1.20 SPDH—Secondary PCI Device Hiding Register
(PCI-PCI—D30:F0)
Offset Address: 40h–41h Attribute: R/W, RO
Default Value: 0000h Size: 16 bits
This register allows software to hide the PCI devices, either plugged into slots or on the
motherboard.
11.1.21 DTC—Delayed Transaction Control Register
(PCI-PCI—D30:F0)
Offset Address: 44h47h Attribute: R/W
Default Value: 00000000h Size: 32 bits
Bit Description
15:4 Reserved
3Hide Device 3 (HD3)—R/W, RO. Same as bit 0 of this register, except for device 3
(AD[19])
2Hide Device 2 (HD2)—R/W, RO. Same as bit 0 of this register, except for device 2
(AD[18])
1Hide Device 1 (HD1)—R/W, RO. Same as bit 0 of this register, except for device 1
(AD[17])
0
Hide Device 0 (HD0)—R/W, RO.
0 = The PCI configuration cycles for this slot are not affected.
1 = The PCH hides device 0 on the PCI bus. This is done by masking the IDSEL
(keeping it low) for configuration cycles to that device. Since the device will not see
its IDSEL go active, it will not respond to PCI configuration cycles and the
processor will think the device is not present. AD[16] is used as IDSEL for device 0.
Bit Description
31
Discard Delayed Transactions (DDT)—R/W.
0 = Logged delayed transactions are kept.
1 = The PCH PCI bridge will discard any delayed transactions it has logged. This
includes transactions in the pending queue, and any transactions in the active
queue, whether in the hard or soft DT state. The prefetchers will be disabled and
return to an idle state.
NOTES:If a transaction is running on PCI at the time this bit is set, that transaction will
continue until either the PCI master disconnects (by de-asserting FRAME#) or
the PCI bridge disconnects (by asserting STOP#). This bit is cleared by the PCI
bridge when the delayed transaction queues are empty and have returned to an
idle state. Software sets this bit and polls for its completion
30
Block Delayed Transactions (BDT)—R/W.
0 = Delayed transactions accepted
1 = The PCH PCI bridge will not accept incoming transactions which will result in
delayed transactions. It will blindly retry these cycles by asserting STOP#. All
postable cycles (memory writes) will still be accepted.
29:8 Reserved
PCI-to-PCI Bridge Registers (D30:F0)
448 Datasheet
7:6
Maximum Delayed Transactions (MDT)—R/W. Controls the maximum number of
delayed transactions that the PCH PCI bridge will run. Encodings are:
00 =) 2 Active, 5 pending
01 =) 2 active, no pending
10 =) 1 active, no pending
11 =) Reserved
5 Reserved
4
Auto Flush After Disconnect Enable (AFADE)—R/W.
0 = The PCI bridge will retain any fetched data until required to discard by producer/
consumer rules.
1 = The PCI bridge will flush any prefetched data after either the PCI master (by de-
asserting FRAME#) or the PCI bridge (by asserting STOP#) disconnects the PCI
transfer.
3
Never Prefetch (NP)—R/W.
0 = Prefetch enabled
1 = The PCH will only fetch a single DW and will not enable prefetching, regardless of
the command being an Memory read (MR), Memory read line (MRL), or Memory
read multiple (MRM).
2
Memory Read Multiple Prefetch Disable (MRMPD)—R/W.
0 = MRM commands will fetch multiple cache lines as defined by the prefetch
algorithm.
1 = Memory read multiple (MRM) commands will fetch only up to a single, 64-byte
aligned cache line.
1
Memory Read Line Prefetch Disable (MRLPD)—R/W.
0 = MRL commands will fetch multiple cache lines as defined by the prefetch algorithm.
1 = Memory read line (MRL) commands will fetch only up to a single, 64-byte aligned
cache line.
0
Memory Read Prefetch Disable (MRPD)—R/W.
0 = MR commands will fetch up to a 64-byte aligned cache line.
1 = Memory read (MR) commands will fetch only a single DW.
Bit Description
Datasheet 449
PCI-to-PCI Bridge Registers (D30:F0)
11.1.22 BPS—Bridge Proprietary Status Register
(PCI-PCI—D30:F0)
Offset Address: 48h4Bh Attribute: R/WC, RO
Default Value: 00000000h Size: 32 bits
Bit Description
31:17 Reserved
16
PERR# Assertion Detected (PAD)—R/WC. This bit is set by hardware whenever the
PERR# pin is asserted on the rising edge of PCI clock. This includes cases in which the
chipset is the agent driving PERR#. It remains asserted until cleared by software
writing a 1 to this location. When enabled by the PERR#-to-SERR# Enable bit (in the
Bridge Policy Configuration register), a 1 in this bit can generate an internal SERR# and
be a source for the NMI logic.
This bit can be used by software to determine the source of a system problem.
15:7 Reserved
6:4
Number of Pending Transactions (NPT)—RO. This read-only indicator tells debug
software how many transactions are in the pending queue. Possible values are:
000 = No pending transaction
001 = 1 pending transaction
010 = 2 pending transactions
011 = 3 pending transactions
100 = 4 pending transactions
101 = 5 pending transactions
110–111 = Reserved
NOTE: This field is not valid if DTC.MDT (offset 44h:bits 7:6) is any value other than
‘00’.
3:2 Reserved
1:0
Number of Active Transactions (NAT)—RO. This read-only indicator tells debug
software how many transactions are in the active queue. Possible values are:
00 = No active transactions
01 = 1 active transaction
10 = 2 active transactions
11 = Reserved
PCI-to-PCI Bridge Registers (D30:F0)
450 Datasheet
11.1.23 BPC—Bridge Policy Configuration Register
(PCI-PCI—D30:F0)
Offset Address: 4Ch4Fh Attribute: R/W
Default Value: 00001200h Size: 32 bits
Bit Description
31:14 Reserved
13:8
Upstream Read Latency Threshold (URLT)—R/W: This field specifies the number of
PCI clocks after internally enqueuing an upstream memory read request at which point
the PCI target logic should insert wait states to optimize lead-off latency. When the
master returns after this threshold has been reached and data has not arrived in the
Delayed Transaction completion queue, then the PCI target logic will insert wait states
instead of immediately retrying the cycle. The PCI target logic will insert up to 16 clocks
of target initial latency (from FRAME# assertion to TRDY# or STOP# assertion) before
retrying the PCI read cycle (if the read data has not arrived yet).
Note that the starting event for this Read Latency Timer is not explicitly visible
externally.
A value of 0h disables this policy completely such that wait states will never be inserted
on the read lead-off data phase.
The default value (12h) specifies 18 PCI clocks (540 ns) and is approximately 4 clocks
less than the typical idle lead-off latency expected for desktop PCH systems. This value
may need to be changed by BIOS, depending on the platform.
7
Subtractive Decode Policy (SDP)—R/W.
0 = The PCI bridge always forwards memory and I/O cycles that are not claimed by any
other device on the backbone (primary interface) to the PCI bus (secondary
interface).
1 = The PCI bridge will not claim and forward memory or I/O cycles at all unless the
corresponding Space Enable bit is set in the Command register.
NOTE: The Boot BIOS Destination Selection strap can force the BIOS accesses to PCI.
6
PERR#-to-SERR# Enable (PSE)—R/W. When this bit is set, a 1 in the PERR#
Assertion status bit (in the Bridge Proprietary Status register) will result in an internal
SERR# assertion on the primary side of the bridge (if also enabled by the SERR#
Enable bit in the primary Command register). SERR# is a source of NMI.
5
Secondary Discard Timer Testmode (SDTT)—R/W.
0 = The secondary discard timer expiration will be defined in BCTRL.SDT (D30:F0:3E,
bit 9)
1 = The secondary discard timer will expire after 128 PCI clocks.
4:3 Reserved
CMD.MSE BPC.SDP Range Forwarding Policy
00Dont Care
Forward unclaimed
cycles
0 1 Don’t Care Forwarding Prohibited
1XWithin range
Positive decode and
forward
1XOutside
Subtractive decode &
forward
Datasheet 451
PCI-to-PCI Bridge Registers (D30:F0)
11.1.24 SVCAP—Subsystem Vendor Capability Register
(PCI-PCI—D30:F0)
Offset Address: 50h51h Attribute: RO
Default Value: 000Dh Size: 16 bits
11.1.25 SVID—Subsystem Vendor IDs Register (PCI-PCI—D30:F0)
Offset Address: 54h57h Attribute: R/WO
Default Value: 00000000h Size: 32 bits
§ §
2
Peer Decode Enable (PDE)—R/W.
0 = The PCI bridge assumes that all memory cycles target main memory, and all I/O
cycles are not claimed.
1 = The PCI bridge will perform peer decode on any memory or I/O cycle from PCI that
falls outside of the memory and I/O window registers
1 Reserved
0
Received Target Abort SERR# Enable (RTAE)—R/W. When set, the PCI bridge will
report SERR# when PSTS.RTA (D30:F0:06 bit 12) or SSTS.RTA (D30:F0:1E bit 12) are
set, and CMD.SEE (D30:F0:04 bit 8) is set.
Bit Description
Bit Description
15:8 Next Capability (NEXT)—RO. Value of 00h indicates this is the last item in the list.
7:0 Capability Identifier (CID)—RO. Value of 0Dh indicates this is a PCI bridge
subsystem vendor capability.
Bit Description
31:16
Subsystem Identifier (SID)—R/WO. Indicates the subsystem as identified by the
vendor. This field is write once and is locked down until a bridge reset occurs (not the
PCI bus reset).
15:0
Subsystem Vendor Identifier (SVID)R/WO. Indicates the manufacturer of the
subsystem. This field is write once and is locked down until a bridge reset occurs (not
the PCI bus reset).
PCI-to-PCI Bridge Registers (D30:F0)
452 Datasheet
Datasheet 453
Gigabit LAN Configuration Registers
12 Gigabit LAN Configuration
Registers
12.1 Gigabit LAN Configuration Registers
(Gigabit LAN—D25:F0)
Note: Register address locations that are not shown in Ta b l e 12-1 should be treated as
Reserved.
/
Table 12-1. Gigabit LAN Configuration Registers Address Map
(Gigabit LAN—D25:F0) (Sheet 1 of 2)
Offset Mnemonic Register Name Default Type
00h–01h VID Vendor Identification 8086h RO
02h–03h DID Device Identification See register
description RO
04h–05h PCICMD PCI Command 0000h R/W, RO
06h–07h PCISTS PCI Status 0010h R/WC, RO
08h RID Revision Identification See register
description RO
09h–0Bh CC Class Code 020000h RO
0Ch CLS Cache Line Size 00h R/W
0Dh PLT Primary Latency Timer 00h RO
0Eh HEADTYP Header Type 00h RO
10h–13h MBARA Memory Base Address A 00000000h R/W, RO
14h–17h MBARB Memory Base Address B 00000000h R/W, RO
18h–1Bh MBARC Memory Base Address C 00000001h R/W, RO
2Ch–2Dh SID Subsystem ID See register
description RO
2Eh–2Fh SVID Subsystem Vendor ID See register
description RO
30h–33h ERBA Expansion ROM Base Address See register
description RO
34h CAPP Capabilities List Pointer C8h RO
3Ch–3Dh INTR Interrupt Information See register
description R/W, RO
3Eh MLMG Maximum Latency/Minimum Grant 00h RO
C8h–C9h CLIST1 Capabilities List 1 D001h RO
CAh–CBh PMC PCI Power Management Capability See register
description RO
CCh–CDh PMCS PCI Power Management Control and
Status
See register
description
R/WC, R/W,
RO
Gigabit LAN Configuration Registers
454 Datasheet
12.1.1 VID—Vendor Identification Register
(Gigabit LAN—D25:F0)
Address Offset: 00h01h Attribute: RO
Default Value: 8086h Size: 16 bits
12.1.2 DID—Device Identification Register
(Gigabit LAN—D25:F0)
Address Offset: 02h–03h Attribute: RO
Default Value: See bit description Size: 16 bits
CFh DR Data Register See register
description RO
D0h–D1h CLIST2 Capabilities List 2 E005h R/WO, RO
D2h–D3h MCTL Message Control 0080h R/W, RO
D4h–D7h MADDL Message Address Low See register
description R/W
D8h–DBh MADDH Message Address High See register
description R/W
DCh–DDh MDAT Message Data See register
description R/W
E0h–E1h FLRCAP Function Level Reset Capability 0009h RO
E2h–E3h FLRCLV Function Level Reset Capability
Length and Value
See register
description R/WO, RO
E4h–E5h DEVCTRL Device Control 0000h R/W, RO
Table 12-1. Gigabit LAN Configuration Registers Address Map
(Gigabit LAN—D25:F0) (Sheet 2 of 2)
Offset Mnemonic Register Name Default Type
Bit Description
15:0
Vendor ID—RO. This is a 16-bit value assigned to Intel. The field may be auto-loaded
from the NVM at address 0Eh during init time depending on the "Load Vendor/Device
ID" bit field in NVM word 0Ah with a default value of 8086h.
Bit Description
15:0
Device ID—RO. This is a 16-bit value assigned to the PCH Gigabit LAN controller. The
field may be auto-loaded from the NVM word 0Dh during initialization time depending
on the "Load Vendor/Device ID" bit field in NVM word 0Ah.
Datasheet 455
Gigabit LAN Configuration Registers
12.1.3 PCICMD—PCI Command Register
(Gigabit LAN—D25:F0)
Address Offset: 04h–05h Attribute: R/W, RO
Default Value: 0000h Size: 16 bits
Bit Description
15:11 Reserved
10
Interrupt Disable—R/W. This disables pin-based INTx# interrupts on enabled Hot-
Plug and power management events. This bit has no effect on MSI operation.
0 = Internal INTx# messages are generated if there is an interrupt for Hot-Plug or
power management and MSI is not enabled.
1 = Internal INTx# messages will not be generated.
This bit does not affect interrupt forwarding from devices connected to the root port.
Assert_INTx and Deassert_INTx messages will still be forwarded to the internal
interrupt controllers if this bit is set.
9 Fast Back to Back Enable (FBE)—RO. Hardwired to 0.
8
SERR# Enable (SEE)—R/W.
0 = Disable
1 = Enables the Gb LAN controller to generate an SERR# message when PSTS.SSE is
set.
7 Wait Cycle Control (WCC)RO. Hardwired to 0.
6
Parity Error Response (PER)—R/W.
0 = Disable.
1 = Indicates that the device is capable of reporting parity errors as a master on the
backbone.
5 Palette Snoop Enable (PSE)—RO. Hardwired to 0.
4 Postable Memory Write Enable (PMWE)—RO. Hardwired to 0.
3 Special Cycle Enable (SCE)RO. Hardwired to 0.
2
Bus Master Enable (BME)—R/W.
0 = Disable. All cycles from the device are master aborted
1 = Enable. Allows the root port to forward cycles onto the backbone from a Gigabit
LAN* device.
1
Memory Space Enable (MSE)—R/W.
0 = Disable. Memory cycles within the range specified by the memory base and limit
registers are master aborted on the backbone.
1 = Enable. Allows memory cycles within the range specified by the memory base and
limit registers can be forwarded to the Gigabit LAN device.
0
I/O Space Enable (IOSE)—R/W. This bit controls access to the I/O space registers.
0 = Disable. I/O cycles within the range specified by the I/O base and limit registers
are master aborted on the backbone.
1 = Enable. Allows I/O cycles within the range specified by the I/O base and limit
registers can be forwarded to the Gigabit LAN device.
Gigabit LAN Configuration Registers
456 Datasheet
12.1.4 PCISTS—PCI Status Register
(Gigabit LAN—D25:F0)
Address Offset: 06h07h Attribute: R/WC, RO
Default Value: 0010h Size: 16 bits
Bit Description
15
Detected Parity Error (DPE)—R/WC.
0 = No parity error detected.
1 = Set when the Gb LAN controller receives a command or data from the backbone
with a parity error. This is set even if PCIMD.PER (D25:F0, bit 6) is not set.
14
Signaled System Error (SSE)R/WC.
0 = No system error signaled.
1 = Set when the Gb LAN controller signals a system error to the internal SERR# logic.
13
Received Master Abort (RMA)—R/WC.
0 = Root port has not received a completion with unsupported request status from the
backbone.
1 = Set when the GbE LAN controller receives a completion with unsupported request
status from the backbone.
12
Received Target Abort (RTA)—R/WC.
0 = Root port has not received a completion with completer abort from the backbone.
1 = Set when the Gb LAN controller receives a completion with completer abort from
the backbone.
11
Signaled Target Abort (STA)—R/WC.
0 = No target abort received.
1 = Set whenever the Gb LAN controller forwards a target abort received from the
downstream device onto the backbone.
10:9 DEVSEL# Timing Status (DEV_STS)RO. Hardwired to ‘0’.
8
Master Data Parity Error Detected (DPED)—R/WC.
0 = No data parity error received.
1 = Set when the Gb LAN Controller receives a completion with a data parity error on
the backbone and PCIMD.PER (D25:F0, bit 6) is set.
7 Fast Back to Back Capable (FB2BC)—RO. Hardwired to ‘0’.
6Reserved
5 66 MHz Capable—RO. Hardwired to 0.
4 Capabilities List—RO. Hardwired to 1. Indicates the presence of a capabilities list.
3
Interrupt StatusRO. Indicates status of Hot-Plug and power management interrupts
on the root port that result in INTx# message generation.
0 = Interrupt is de-asserted.
1 = Interrupt is asserted.
This bit is not set if MSI is enabled. If MSI is not enabled, this bit is set regardless of the
state of PCICMD.Interrupt Disable bit (D25:F0:04h:bit 10).
2:0 Reserved
Datasheet 457
Gigabit LAN Configuration Registers
12.1.5 RID—Revision Identification Register
(Gigabit LAN—D25:F0)
Offset Address: 08h Attribute: RO
Default Value: See bit description Size: 8 bits
12.1.6 CC—Class Code Register
(Gigabit LAN—D25:F0)
Address Offset: 09h0Bh Attribute: RO
Default Value: 020000h Size: 24 bits
12.1.7 CLS—Cache Line Size Register
(Gigabit LAN—D25:F0)
Address Offset: 0Ch Attribute: R/W
Default Value: 00h Size: 8 bits
12.1.8 PLT—Primary Latency Timer Register
(Gigabit LAN—D25:F0)
Address Offset: 0Dh Attribute: RO
Default Value: 00h Size: 8 bits
12.1.9 HT—Header Type Register
(Gigabit LAN—D25:F0)
Address Offset: 0Eh Attribute: RO
Default Value: 00h Size: 8 bits
Bit Description
7:0 Revision ID—RO. See the Intel® 5 Series Chipset and Intel® 3400 Series Chipset
Specification Update for the value of the Revision ID Register
Bit Description
23:0 Class Code—RO. Identifies the device as an Ethernet Adapter.
020000h = Ethernet Adapter.
Bit Description
7:0 Cache Line Size—R/W. This field is implemented by PCI devices as a read write field
for legacy compatibility purposes but has no impact on any device functionality.
Bit Description
7:0 Latency Timer (LT)—RO. Hardwired to 0.
Bit Description
7:0 Header Type (HT)—RO.
00h = Indicates this is a single function device.
Gigabit LAN Configuration Registers
458 Datasheet
12.1.10 MBARA—Memory Base Address Register A
(Gigabit LAN—D25:F0)
Address Offset: 10h13h Attribute: R/W, RO
Default Value: 00000000h Size: 32 bits
The internal CSR registers and memories are accessed as direct memory mapped
offsets from the base address register. SW may only access whole DWord at a time.
12.1.11 MBARB—Memory Base Address Register B
(Gigabit LAN—D25:F0)
Address Offset: 14h17h Attribute: R/W, RO
Default Value: 00000000h Size: 32 bits
The internal registers that are used to access the LAN Space in the External FLASH
device. Access to these registers are direct memory mapped offsets from the base
address register. Software may only access a DWord at a time.
Bit Description
31:17 Base Address (BA)—R/W. Software programs this field with the base address of this
region.
16:4 Memory Size (MSIZE)—R/W. Memory size is 128 KB.
3Prefetchable Memory (PM)—RO. The GbE LAN controller does not implement
prefetchable memory.
2:1 Memory Type (MT)—RO. Set to 00b indicating a 32 bit BAR.
0Memory / IO Space (MIOS)—RO. Set to 0 indicating a Memory Space BAR.
Bit Description
31:12 Base Address (BA)—R/W. Software programs this field with the base address of this
region.
11:4 Memory Size (MSIZE)—R/W. Memory size is 4 KB.
3Prefetchable Memory (PM)—RO. The Gb LAN controller does not implement
prefetchable memory.
2:1 Memory Type (MT)—RO. Set to 00b indicating a 32 bit BAR.
0Memory / IO Space (MIOS)—RO. Set to 0 indicating a Memory Space BAR.
Datasheet 459
Gigabit LAN Configuration Registers
12.1.12 MBARC—Memory Base Address Register C
(Gigabit LAN—D25:F0)
Address Offset: 18h1Bh Attribute: R/W, RO
Default Value: 00000001h Size: 32 bits
Internal registers, and memories, can be accessed using I/O operations. There are two
4B registers in the I/O mapping window: Addr Reg and Data Reg. Software may only
access a DWord at a time.
12.1.13 SVID—Subsystem Vendor ID Register
(Gigabit LAN—D25:F0)
Address Offset: 2Ch2Dh Attribute: RO
Default Value: See bit description Size: 16 bits
12.1.14 SID—Subsystem ID Register
(Gigabit LAN—D25:F0)
Address Offset: 2Eh2Fh Attribute: RO
Default Value: See bit description Size: 16 bits
12.1.15 ERBA—Expansion ROM Base Address Register
(Gigabit LAN—D25:F0)
Address Offset: 30h33h Attribute: RO
Default Value: See bit description Size: 32 bits
Bit Description
31:5 Base Address (BA)—R/W. Software programs this field with the base address of this
region.
4:1 I/O Size (IOSIZE)—RO. I/O space size is 32 Bytes.
0Memory / I/O Space (MIOS)—RO. Set to 1 indicating an I/O Space BAR.
Bit Description
15:0
Subsystem Vendor ID (SVID)—RO. This value may be loaded automatically from
the NVM Word 0Ch upon power up depending on the "Load Subsystem ID" bit field in
NVM word 0Ah. A value of 8086h is default for this field upon power up if the NVM does
not respond or is not programmed. All functions are initialized to the same value.
Bit Description
15:0
Subsystem ID (SID)—RO. This value may be loaded automatically from the NVM
Word 0Bh upon power up or reset depending on the “Load Subsystem ID” bit field in
NVM word 0Ah with a default value of 0000h. This value is loadable from NVM word
location 0Ah.
Bit Description
31:0
Expansion ROM Base Address (ERBA)—RO. This register is used to define the
address and size information for boot-time access to the optional FLASH memory. If no
Flash memory exists, this register reports 00000000h.
Gigabit LAN Configuration Registers
460 Datasheet
12.1.16 CAPP—Capabilities List Pointer Register
(Gigabit LAN—D25:F0)
Address Offset: 34h Attribute: R0
Default Value: C8h Size: 8 bits
12.1.17 INTR—Interrupt Information Register
(Gigabit LAN—D25:F0)
Address Offset: 3Ch–3Dh Attribute: R/W, RO
Default Value: 0100h Size: 16 bits
Function Level Reset: No
12.1.18 MLMG—Maximum Latency/Minimum Grant Register
(Gigabit LAN—D25:F0)
Address Offset: 3Eh Attribute: RO
Default Value: 00h Size: 8 bits
12.1.19 CLIST 1—Capabilities List Register 1
(Gigabit LAN—D25:F0)
Address Offset: C8h–C9h Attribute: RO
Default Value: D001h Size: 16 bits
Bit Description
7:0 Capabilities Pointer (PTR)—RO. Indicates that the pointer for the first entry in the
capabilities list is at C8h in configuration space.
Bit Description
15:8
Interrupt Pin (IPIN)—RO. Indicates the interrupt pin driven by the GbE LAN
controller.
01h = The GbE LAN controller implements legacy interrupts on INTA.
7:0
Interrupt Line (ILINE)—R/W. Default = 00h. Software written value to indicate which
interrupt line (vector) the interrupt is connected to. No hardware action is taken on this
register.
Bit Description
7:0 Maximum Latency/Minimum Grant (MLMG)—RO. Not used. Hardwired to 00h.
Bit Description
15:8 Next Capability (NEXT)—RO. Value of D0h indicates the location of the next pointer.
7:0 Capability ID (CID)—RO. Indicates the linked list item is a PCI Power Management
Register.
Datasheet 461
Gigabit LAN Configuration Registers
12.1.20 PMC—PCI Power Management Capabilities Register
(Gigabit LAN—D25:F0)
Address Offset: CAhCBh Attribute: RO
Default Value: See bit descriptions Size: 16 bits
Function Level Reset: No (Bits 15:11 only)
Bit Description
15:11
PME_Support (PMES)—RO. This five-bit field indicates the power states in which the
function may assert PME#. It depend on PM Ena and AUX-PWR bits in word 0Ah in the
NVM:
These bits are not reset by Function Level Reset.
10 D2_Support (D2S)—RO. The D2 state is not supported.
9D1_Support (D1S)—RO. The D1 state is not supported.
8:6 Aux_Current (AC)—RO. Required current defined in the Data Register.
5Device Specific Initialization (DSI)—RO. Set to 1. The GbE LAN Controller requires
its device driver to be executed following transition to the D0 un-initialized state.
4 Reserved
3 PME Clock (PMEC)—RO. Hardwired to 0.
2:0 Version (VS)—RO. Hardwired to 010b to indicate support for Revision 1.1 of the PCI
Power Management Specification.
Condition Function Value
PM Ena=0 No PME at all states 0000b
PM Ena & AUX-PWR=0 PME at D0 and D3hot 01001b
PM Ena & AUX-PWR=1 PME at D0, D3hot and
D3cold 11001b
Gigabit LAN Configuration Registers
462 Datasheet
12.1.21 PMCS—PCI Power Management Control and Status
Register (Gigabit LAN—D25:F0)
Address Offset: CChCDh Attribute: R/WC, R/W, RO
Default Value: See bit description Size: 16 bits
Function Level Reset: No (Bit 8 only)
Bit Description
15 PME Status (PMES)—R/WC. This bit is set to 1 when the function detects a wake-up
event independent of the state of the PMEE bit. Writing a 1 will clear this bit.
14:13
Data Scale (DSC)—R/W. This field indicates the scaling factor to be used when
interpreting the value of the Data register.
For the GbE LAN and common functions this field equals 01b (indicating 0.1 watt units)
if the PM is enabled in the NVM, and the Data_Select field is set to 0, 3, 4, 7, (or 8 for
Function 0). Else it equals 00b.
For the manageability functions this field equals 10b (indicating 0.01 watt units) if the
PM is enabled in the NVM, and the Data_Select field is set to 0, 3, 4, 7. Else it equals
00b.
12:9
Data Select (DSL)—R/W. This four-bit field is used to select which data is to be
reported through the Data register (offset CFh) and Data_Scale field. These bits are
writeable only when the Power Management is enabled using NVM.
0h = D0 Power Consumption
3h = D3 Power Consumption
4h = D0 Power Dissipation
7h = D3 Power Dissipation
8h = Common Power
All other values are reserved.
8
PME Enable (PMEE)—R/W. If Power Management is enabled in the NVM, writing a 1 to
this register will enable Wakeup. If Power Management is disabled in the NVM, writing a
1 to this bit has no affect, and will not set the bit to 1. This bit is not reset by Function
Level Reset.
7:4 Reserved - Returns a value of 0000.
3No Soft Reset (NSR)—RO. Defines if the device executed internal reset on the
transition to D0. the LAN controller always reports 0 in this field.
2 Reserved - Returns a value of 0b.
1:0
Power State (PS)R/W. This field is used both to determine the current power state
of the GbE LAN Controller and to set a new power state. The values are:
00 = D0 state (default)
01 = Ignored
10 = Ignored
11 = D3 state (Power Management must be enables in the NVM or this cycle will be
ignored).
Datasheet 463
Gigabit LAN Configuration Registers
12.1.22 DR—Data Register
(Gigabit LAN—D25:F0)
Address Offset: CFh Attribute: RO
Default Value: See bit description Size: 8 bits
12.1.23 CLIST 2—Capabilities List Register 2
(Gigabit LAN—D25:F0)
Address Offset: D0h–D1h Attribute: R/WO, RO
Default Value: E005h Size: 16 bits
Function Level Reset: No (Bits 15:8 only)
12.1.24 MCTL—Message Control Register
(Gigabit LAN—D25:F0)
Address Offset: D2h–D3h Attribute: R/W, RO
Default Value: 0080h Size: 16 bits
Bit Description
7:0
Reported Data (RD)RO. This register is used to report power consumption and heat
dissipation. This register is controlled by the Data_Select field in the PMCS (Offset CCh,
bits 12:9), and the power scale is reported in the Data_Scale field in the PMCS (Offset
CCh, bits 14:13). The data of this field is loaded from the NVM if PM is enabled in the
NVM or with a default value of 00h otherwise.
Bit Description
15:8
Next Capability (NEXT)—R/WO. Value of E0h points to the Function Level Reset
capability structure.
These bits are not reset by Function Level Reset.
7:0 Capability ID (CID)—RO. Indicates the linked list item is a Message Signaled
Interrupt Register.
Bit Description
15:8 Reserved
764-bit Capable (CID)—RO. Set to 1 to indicate that the GbE LAN Controller is capable
of generating 64-bit message addresses.
6:4 Multiple Message Enable (MME)RO. Returns 000b to indicate that the GbE LAN
controller only supports a single message.
3:1 Multiple Message Capable (MMC)—RO. The GbE LAN controller does not support
multiple messages.
0
MSI Enable (MSIE)—R/W.
0 = MSI generation is disabled.
1 = The Gb LAN controller will generate MSI for interrupt assertion instead of INTx
signaling.
Gigabit LAN Configuration Registers
464 Datasheet
12.1.25 MADDL—Message Address Low Register
(Gigabit LAN—D25:F0)
Address Offset: D4h–D7h Attribute: R/W
Default Value: See bit description Size: 32 bits
12.1.26 MADDH—Message Address High Register
(Gigabit LAN—D25:F0)
Address Offset: D8h–DBh Attribute: R/W
Default Value: See bit description Size: 32 bits
12.1.27 MDAT—Message Data Register
(Gigabit LAN—D25:F0)
Address Offset: DCh–DDh Attribute: R/W
Default Value: See bit description Size: 16 bits
12.1.28 FLRCAP—Function Level Reset Capability
(Gigabit LAN—D25:F0)
Address Offset: E0h–E1h Attribute: RO
Default Value: 0009h Size: 16 bits
Bit Description
31:0
Message Address Low (MADDL)—R/W. Written by the system to indicate the lower
32 bits of the address to use for the MSI memory write transaction. The lower two bits
will always return 0 regardless of the write operation.
Bit Description
31:0 Message Address High (MADDH)—R/W. Written by the system to indicate the upper
32 bits of the address to use for the MSI memory write transaction.
Bit Description
31:0
Message Data (MDAT)—R/W. Written by the system to indicate the lower 16 bits of
the data written in the MSI memory write DWORD transaction. The upper 16 bits of the
transaction are written as 0000h.
Bit Description
15:8 Next Pointer—RO. This field provides an offset to the next capability item in the
capability list. The value of 00h indicates the last item in the list.
7:0
Capability ID—RO. The value of this field depends on the FLRCSSEL bit.
13h = If FLRCSSEL = 0
09h = If FLRCSSEL = 1, indicating vendor specific capability.
Datasheet 465
Gigabit LAN Configuration Registers
12.1.29 FLRCLV—Function Level Reset Capability Length and
Version
(Gigabit LAN—D25:F0)
Address Offset: E2h–E3h Attribute: R/WO, RO
Default Value: See Description. Size: 16 bits
Function Level Reset: No (Bits 9:8 Only When FLRCSSEL = 0)
When FLRCSSEL = 0, this register is defined as follows:
When FLRCSSEL = 1, this register is defined as follows:
12.1.30 DEVCTRL—Device Control (Gigabit LAN—D25:F0)
Address Offset: E4–E5h Attribute: R/W, RO
Default Value: 0000h Size: 16 bits
Bit Description
15:10 Reserved
9
Function Level Reset Capability—R/WO.
1 = Support for Function Level Reset.
This bit is not reset by Function Level Reset.
8
TXP Capability—R/WO.
1 = Indicates support for the Transactions Pending (TXP) bit. TXP must be supported if
FLR is supported.
7:0
Capability Length—RO. The value of this field indicates the number of bytes of the
vendor specific capability as require by the PCI spec. It has the value of 06h for the
Function Level Reset capability.
Bit Description
15:12 Vendor Specific Capability ID—RO. A value of 2h in this field identifies this capability
as Function Level Reset.
11:8 Capability Version—RO. The value of this field indicates the version of the Function
Level Reset Capability. Default is 0h.
7:0
Capability Length—RO. The value of this field indicates the number of bytes of the
vendor specific capability as require by the PCI spec. It has the value of 06h for the
Function Level Reset capability.
Bit Description
15:9 Reserved
8
Transactions Pending (TXP)—R/W.
1 = Indicates the controller has issued Non-Posted requests which have not been
completed.
0 = Indicates that completions for all Non-Posted requests have been received.
7:1 Reserved
0
Initiate Function Level Reset—RO. This bit is used to initiate an FLT transition. A
write of 1 initiates the transition. Since hardware must not respond to any cycles until
Function Level Reset completion, the value read by software from this bit is 0.
Gigabit LAN Configuration Registers
466 Datasheet
§ §
Datasheet 467
LPC Interface Bridge Registers (D31:F0)
13 LPC Interface Bridge Registers
(D31:F0)
The LPC bridge function of the PCH resides in PCI Device 31:Function 0. This function
contains many other functional units, such as DMA and Interrupt controllers, Timers,
Power Management, System Management, GPIO, RTC, and LPC Configuration
Registers.
Registers and functions associated with other functional units are described in their
respective sections.
13.1 PCI Configuration Registers (LPC I/F—D31:F0)
Note: Address locations that are not shown should be treated as Reserved.
.
Table 13-1. LPC Interface PCI Register Address Map (LPC I/F—D31:F0) (Sheet 1 of 2)
Offset Mnemonic Register Name Default Type
00h–01h VID Vendor Identification 8086h RO
02h–03h DID Device Identification See register
description RO
04h–05h PCICMD PCI Command 0007h R/W, RO
06h–07h PCISTS PCI Status 0210h R/WC, RO
08h RID Revision Identification See register
description RO
09h PI Programming Interface 00h RO
0Ah SCC Sub Class Code 01h RO
0Bh BCC Base Class Code 06h RO
0Dh PLT Primary Latency Timer 00h RO
0Eh HEADTYP Header Type 80h RO
2Ch–2Fh SS Sub System Identifiers 00000000h R/WO
34h CAPP Capability List Pointer E0h RO
40h–43h PMBASE ACPI Base Address 00000001h R/W, RO
44h ACPI_CNTL ACPI Control 00h R/W
48h–4Bh GPIOBASE GPIO Base Address 00000001h R/W, RO
4C GC GPIO Control 00h R/W
60h–63h PIRQ[n]_ROUT PIRQ[A–D] Routing Control 80808080h R/W
64h SIRQ_CNTL Serial IRQ Control 10h R/W, RO
68h–6Bh PIRQ[n]_ROUT PIRQ[E–H] Routing Control 80808080h R/W
6Ch–6Dh LPC_IBDF IOxAPIC Bus:Device:Function 00F8h R/W
70h–7F HPET Configuration
80h LPC_I/O_DEC I/O Decode Ranges 0000h R/W
LPC Interface Bridge Registers (D31:F0)
468 Datasheet
13.1.1 VID—Vendor Identification Register (LPC I/F—D31:F0)
Offset Address: 00h01h Attribute: RO
Default Value: 8086h Size: 16-bit
Lockable: No Power Well: Core
13.1.2 DID—Device Identification Register (LPC I/F—D31:F0)
Offset Address: 02h03h Attribute: RO
Default Value: See bit description Size: 16-bit
Lockable: No Power Well: Core
82h–83h LPC_EN LPC I/F Enables 0000h R/W
84h–87h GEN1_DEC LPC I/F Generic Decode Range 1 00000000h R/W
88h–8Bh GEN2_DEC LPC I/F Generic Decode Range 2 00000000h R/W
8Ch–8Eh GEN3_DEC LPC I/F Generic Decode Range 3 00000000h R/W
90h–93h GEN4_DEC LPC I/F Generic Decode Range 4 00000000h R/W
94h–97h ULKMC USB Legacy Keyboard / Mouse
Control
98h–9Bh LGMR LPC Generic Memory Range 00000000h R/W
A0h–CFh Power Management (See
Section 13.8.1)
D0h–D3h FWH_SEL1 Firmware Hub Select 1 00112233h R/W, RO
D4h–D5h FWH_SEL2 Firmware Hub Select 2 4567h R/W
D8h–D9h FWH_DEC_EN1 Firmware Hub Decode Enable 1 FFCFh R/W, RO
DCh BIOS_CNTL BIOS Control 00h R/WLO, R/W,
RO
E0h–E1h FDCAP Feature Detection Capability ID 0009h RO
E2h FDLEN Feature Detection Capability
Length 0Ch RO
E3h FDVER Feature Detection Version 10h RO
E4h–EBh FDVCT Feature Vector See
Description RO
F0h–F3h RCBA Root Complex Base Address 00000000h R/W
Table 13-1. LPC Interface PCI Register Address Map (LPC I/F—D31:F0) (Sheet 2 of 2)
Offset Mnemonic Register Name Default Type
Bit Description
15:0 Vendor ID—RO. This is a 16-bit value assigned to Intel. Intel VID = 8086h
Bit Description
15:0
Device ID—RO. This is a 16-bit value assigned to the PCH LPC bridge. See the Intel®
5 Series Chipset and Intel® 3400 Series Chipset Specification Update for the value of
the Device ID Register.
Datasheet 469
LPC Interface Bridge Registers (D31:F0)
13.1.3 PCICMD—PCI COMMAND Register (LPC I/F—D31:F0)
Offset Address: 04h05h Attribute: R/W, RO
Default Value: 0007h Size: 16-bit
Lockable: No Power Well: Core
Bit Description
15:10 Reserved
9 Fast Back to Back Enable (FBE)—RO. Hardwired to 0.
8SERR# Enable (SERR_EN)—R/W. The LPC bridge generates SERR# if this bit is set.
7 Wait Cycle Control (WCC)—RO. Hardwired to 0.
6
Parity Error Response Enable (PERE)—R/W.
0 = No action is taken when detecting a parity error.
1 = Enables the PCH LPC bridge to respond to parity errors detected on backbone
interface.
5 VGA Palette Snoop (VPS)—RO. Hardwired to 0.
4 Memory Write and Invalidate Enable (MWIE)—RO. Hardwired to 0.
3 Special Cycle Enable (SCE)—RO. Hardwired to 0.
2 Bus Master Enable (BME)—RO. Bus Masters cannot be disabled.
1 Memory Space Enable (MSE)—RO. Memory space cannot be disabled on LPC.
0 I/O Space Enable (IOSE)—RO. I/O space cannot be disabled on LPC.
LPC Interface Bridge Registers (D31:F0)
470 Datasheet
13.1.4 PCISTS—PCI Status Register (LPC I/F—D31:F0)
Offset Address: 06h07h Attribute: RO, R/WC
Default Value: 0210h Size: 16-bit
Lockable: No Power Well: Core
Note: For the writable bits, software must write a 1 to clear bits that are set. Writing a 0 to
the bit has no effect.
Bit Description
15
Detected Parity Error (DPE)—R/WC. Set when the LPC bridge detects a parity
error on the internal backbone. Set even if the PCICMD.PERE bit (D31:F0:04, bit 6) is
0.
0 = Parity Error Not detected.
1 = Parity Error detected.
14 Signaled System Error (SSE)—R/WC. Set when the LPC bridge signals a system
error to the internal SERR# logic.
13
Master Abort Status (RMA)—R/WC.
0 = Unsupported request status not received.
1 = The bridge received a completion with unsupported request status from the
backbone.
12
Received Target Abort (RTA)—R/WC.
0 = Completion abort not received.
1 = Completion with completion abort received from the backbone.
11
Signaled Target Abort (STA)—R/WC.
0 = Target abort Not generated on the backbone.
1 = LPC bridge generated a completion packet with target abort status on the
backbone.
10:9 DEVSEL# Timing Status (DEV_STS)—RO.
01 = Medium Timing.
8
Data Parity Error Detected (DPED)—R/WC.
0 = All conditions listed below Not met.
1 = Set when all three of the following conditions are met:
LPC bridge receives a completion packet from the backbone from a previous
request,
Parity error has been detected (D31:F0:06, bit 15)
PCICMD.PERE bit (D31:F0:04, bit 6) is set.
7Fast Back to Back Capable (FBC): Reserved – bit has no meaning on the internal
backbone.
6 Reserved
566 MHz Capable (66MHZ_CAP)—Reserved – bit has no meaning on the internal
backbone.
4Capabilities List (CLIST)—RO. Capability list exists on the LPC bridge.
3Interrupt Status (IS)—RO. The LPC bridge does not generate interrupts.
2:0 Reserved
Datasheet 471
LPC Interface Bridge Registers (D31:F0)
13.1.5 RID—Revision Identification Register (LPC I/F—D31:F0)
Offset Address: 08h Attribute: RO
Default Value: See bit description Size: 8 bits
13.1.6 PI—Programming Interface Register (LPC I/F—D31:F0)
Offset Address: 09h Attribute: RO
Default Value: 00h Size: 8 bits
13.1.7 SCC—Sub Class Code Register (LPC I/F—D31:F0)
Offset Address: 0Ah Attribute: RO
Default Value: 01h Size: 8 bits
13.1.8 BCC—Base Class Code Register (LPC I/F—D31:F0)
Offset Address: 0Bh Attribute: RO
Default Value: 06h Size: 8 bits
13.1.9 PLT—Primary Latency Timer Register (LPC I/F—D31:F0)
Offset Address: 0Dh Attribute: RO
Default Value: 00h Size: 8 bits
Bit Description
7:0 Revision ID (RID)—RO. See the Intel® 5 Series Chipset and Intel® 3400 Series
Chipset Specification Update for the value of the Revision ID Register
Bit Description
7:0 Programming Interface—RO.
Bit Description
7:0
Sub Class Code—RO. 8-bit value that indicates the category of bridge for the LPC
bridge.
01h = PCI-to-ISA bridge.
Bit Description
7:0 Base Class Code—RO. 8-bit value that indicates the type of device for the LPC bridge.
06h = Bridge device.
Bit Description
7:3 Master Latency Count (MLC)—Reserved.
2:0 Reserved
LPC Interface Bridge Registers (D31:F0)
472 Datasheet
13.1.10 HEADTYP—Header Type Register (LPC I/F—D31:F0)
Offset Address: 0Eh Attribute: RO
Default Value: 80h Size: 8 bits
13.1.11 SS—Sub System Identifiers Register (LPC I/F—D31:F0)
Offset Address: 2Ch2Fh Attribute: R/WO
Default Value: 00000000h Size: 32 bits
This register is initialized to logic 0 by the assertion of PLTRST#. This register can be
written only once after PLTRST# de-assertion.
13.1.12 CAPP—Capability List Pointer Register (LPC I/F—D31:F0)
Offset Address: 34h Attribute: RO
Default Value: E0h Size: 8 bits
13.1.13 PMBASE—ACPI Base Address Register (LPC I/F—D31:F0)
Offset Address: 40h43h Attribute: R/W, RO
Default Value: 00000001h Size: 32 bit
Lockable: No Usage: ACPI, Legacy
Power Well: Core
Sets base address for ACPI I/O registers, GPIO registers and TCO I/O registers. These
registers can be mapped anywhere in the 64-K I/O space on 128-byte boundaries.
Bit Description
7Multi-Function Device—RO. This bit is 1 to indicate a multi-function device.
6:0 Header TypeRO. This 7-bit field identifies the header layout of the configuration
space.
Bit Description
31:16 Subsystem ID (SSID)—R/WO. This is written by BIOS. No hardware action taken on
this value.
15:0 Subsystem Vendor ID (SSVID)—R/WO. This is written by BIOS. No hardware action
taken on this value.
Bit Description
7:0 Capability Pointer (CP)—RO. Indicates the offset of the first Capability
Item.
Bit Description
31:16 Reserved
15:7 Base Address—R/W. This field provides 128 bytes of I/O space for ACPI, GPIO, and
TCO logic. This is placed on a 128-byte boundary.
6:1 Reserved
0 Resource Type Indicator (RTE)—RO. Hardwired to 1 to indicate I/O space.
Datasheet 473
LPC Interface Bridge Registers (D31:F0)
13.1.14 ACPI_CNTL—ACPI Control Register (LPC I/F—D31:F0)
Offset Address: 44h Attribute: R/W
Default Value: 00h Size: 8 bit
Lockable: No Usage: ACPI, Legacy
Power Well: Core
13.1.15 GPIOBASE—GPIO Base Address Register
(LPC I/F—D31:F0)
Offset Address: 48h–4Bh Attribute: R/W, RO
Default Value: 00000001h Size: 32 bit
Bit Description
7
ACPI Enable (ACPI_EN)—R/W.
0 = Disable.
1 = Decode of the I/O range pointed to by the ACPI base register is enabled, and the
ACPI power management function is enabled. Note that the APM power
management ranges (B2/B3h) are always enabled and are not affected by this bit.
6:3 Reserved
2:0
SCI IRQ Select (SCI_IRQ_SEL)—R/W.
Specifies on which IRQ the SCI will internally appear. If not using the APIC, the SCI
must be routed to IRQ9–11, and that interrupt is not sharable with the SERIRQ stream,
but is shareable with other PCI interrupts. If using the APIC, the SCI can also be
mapped to IRQ20–23, and can be shared with other interrupts.
When the interrupt is mapped to APIC interrupts 9, 10, or 11, the APIC should be
programmed for active-high reception. When the interrupt is mapped to APIC interrupts
20 through 23, the APIC should be programmed for active-low reception.
000b IRQ9
001b IRQ10
010b IRQ11
011b Reserved
100b IRQ20 (Only available if APIC enabled)
101b IRQ21 (Only available if APIC enabled)
110b IRQ22 (Only available if APIC enabled)
111b IRQ23 (Only available if APIC enabled)
Bit Description
31:16 Reserved. Always 0.
15:7 Base Address (BA)—R/W. Provides the 128 bytes of I/O space for GPIO.
6:1 Reserved. Always 0.
0 RO. Hardwired to 1 to indicate I/O space.
LPC Interface Bridge Registers (D31:F0)
474 Datasheet
13.1.16 GC—GPIO Control Register (LPC I/F—D31:F0)
Offset Address: 4Ch Attribute: R/W
Default Value: 00h Size: 8 bit
Bit Description
7:5 Reserved
4
GPIO Enable (EN)—R/W. This bit enables/disables decode of the I/O range pointed to
by the GPIO Base Address register (D31:F0:48h) and enables the GPIO function.
0 = Disable.
1 = Enable.
3:1 Reserved
0
GPIO Lockdown Enable (GLE)—R/W. This bit enables lockdown of the following GPIO
registers:
Offset 00h: GPIO_USE_SEL
Offset 04h: GP_IO_SEL
Offset 0Ch: GP_LVL
Offset 30h: GPIO_USE_SEL2
Offset 34h: GP_IO_SEL2
Offset 38h: GP_LVL2
Offset 40h: GPIO_USE_SEL3
Offset 44h: GP_IO_SEL3
Offset 48h: GP_LVL3
Offset 60h: GP_RST_SEL
0 = Disable.
1 = Enable.
When this bit is written from 1-to-0, an SMI# is generated, if enabled. This ensures
that only SMM code can change the above GPIO registers after they are locked down.
Datasheet 475
LPC Interface Bridge Registers (D31:F0)
13.1.17 PIRQ[n]_ROUT—PIRQ[A,B,C,D] Routing Control Register
(LPC I/F—D31:F0)
Offset Address: PIRQA 60h, PIRQB 61h, Attribute: R/W
PIRQC 62h, PIRQD 63h
Default Value: 80h Size: 8 bit
Lockable: No Power Well: Core
Bit Description
7
Interrupt Routing Enable (IRQEN)—R/W.
0 = The corresponding PIRQ is routed to one of the ISA-compatible interrupts
specified in bits[3:0].
1 = The PIRQ is not routed to the 8259.
NOTE: BIOS must program this bit to 0 during POST for any of the PIRQs that are
being used. The value of this bit may subsequently be changed by the OS
when setting up for I/O APIC interrupt delivery mode.
6:4 Reserved
3:0
IRQ Routing—R/W. (ISA compatible.)
Value IRQ Value IRQ
0000b Reserved 1000b Reserved
0001b Reserved 1001b IRQ9
0010b Reserved 1010b IRQ10
0011b IRQ3 1011b IRQ11
0100b IRQ4 1100b IRQ12
0101b IRQ5 1101b Reserved
0110b IRQ6 1110b IRQ14
0111b IRQ7 1111b IRQ15
LPC Interface Bridge Registers (D31:F0)
476 Datasheet
13.1.18 SIRQ_CNTL—Serial IRQ Control Register
(LPC I/F—D31:F0)
Offset Address: 64h Attribute: R/W, RO
Default Value: 10h Size: 8 bit
Lockable: No Power Well: Core
Bit Description
7
Serial IRQ Enable (SIRQEN)—R/W.
0 = The buffer is input only and internally SERIRQ will be a 1.
1 = Serial IRQs will be recognized. The SERIRQ pin will be configured as SERIRQ.
6
Serial IRQ Mode Select (SIRQMD)—R/W.
0 = The serial IRQ machine will be in quiet mode.
1 = The serial IRQ machine will be in continuous mode.
NOTE: For systems using Quiet Mode, this bit should be set to 1 (Continuous Mode) for
at least one frame after coming out of reset before switching back to Quiet
Mode. Failure to do so will result in the PCH not recognizing SERIRQ interrupts.
5:2 Serial IRQ Frame Size (SIRQSZ)—RO. Fixed field that indicates the size of the
SERIRQ frame as 21 frames.
1:0
Start Frame Pulse Width (SFPW)—R/W. This is the number of PCI clocks that the
SERIRQ pin will be driven low by the serial IRQ machine to signal a start frame. In
continuous mode, the PCH will drive the start frame for the number of clocks specified.
In quiet mode, the PCH will drive the start frame for the number of clocks specified
minus one, as the first clock was driven by the peripheral.
00 = 4 clocks
01 = 6 clocks
10 = 8 clocks
11 = Reserved
Datasheet 477
LPC Interface Bridge Registers (D31:F0)
13.1.19 PIRQ[n]_ROUT—PIRQ[E,F,G,H] Routing Control Register
(LPC I/F—D31:F0)
Offset Address: PIRQE 68h, PIRQF 69h, Attribute: R/W
PIRQG 6Ah, PIRQH 6Bh
Default Value: 80h Size: 8 bit
Lockable: No Power Well: Core
13.1.20 LPC_IBDF—IOxAPIC Bus:Device:Function Register
(LPC I/F—D31:F0)
Offset Address: 6Ch–6Dh Attribute: R/W
Default Value: 00F8h Size: 16 bit
Bit Description
7
Interrupt Routing Enable (IRQEN)—R/W.
0 = The corresponding PIRQ is routed to one of the ISA-compatible interrupts specified
in bits[3:0].
1 = The PIRQ is not routed to the 8259.
NOTE: BIOS must program this bit to 0 during POST for any of the PIRQs that are
being used. The value of this bit may subsequently be changed by the OS when
setting up for I/O APIC interrupt delivery mode.
6:4 Reserved
3:0
IRQ Routing—R/W. (ISA compatible.)
QQ
0000b Reserved 1000b Reserved
0001b Reserved 1001b IRQ9
0010b Reserved 1010b IRQ10
0011b IRQ3 1011b IRQ11
0100b IRQ4 1100b IRQ12
0101b IRQ5 1101b Reserved
0110b IRQ6 1110b IRQ14
0111b IRQ7 1111b IRQ15
Bit Description
15:0
IOxAPIC Bus:Device:Function (IBDF)—R/W. this field specifies the
bus:device:function that PCH’s IOxAPIC will be using for the following:
As the Requester ID when initiating Interrupt Messages to the processor.
As the Completer ID when responding to the reads targeting the IOxAPIC’s
Memory-Mapped I/O registers.
The 16-bit field comprises the following:
This field defaults to Bus 0: Device 31: Function 0 after reset. BIOS can program this
field to provide a unique bus:device:function number for the internal IOxAPIC.
p
15:8 Bus Number
7:3 Device Number
2:0 Function Number
LPC Interface Bridge Registers (D31:F0)
478 Datasheet
13.1.21 LPC_HnBDF—HPET n Bus:Device:Function Register
(LPC I/F—D31:F0)
Address Offset H0BDF 70h–71h
H1BDF 72h–73h
H2BDF 74h–75h
H3BDF 76h–77h
H4BDF 78h–79h
H5BDF 7Ah–7Bh
H6BDF 7Ch–7Dh
H7BDF 7Eh–7Fh Attribute: R/W
Default Value: 00F8h Size: 16 bit
Bit Description
15:0
HPET n Bus:Device:Function (HnBDF)R/W. This field specifies the
bus:device:function that the PCH’s HPET n will be using in the following:
As the Requester ID when initiating Interrupt Messages to the processor
As the Completer ID when responding to the reads targeting the corresponding
HPET’s Memory-Mapped I/O registers
The 16-bit field comprises the following:
This field is default to Bus 0: Device 31: Function 0 after reset. BIOS shall program this
field accordingly if unique bus:device:function number is required for the
corresponding HPET.
Bits Description
15:8 Bus Number
7:3 Device Number
2:0 Function Number
Datasheet 479
LPC Interface Bridge Registers (D31:F0)
13.1.22 LPC_I/O_DEC—I/O Decode Ranges Register
(LPC I/F—D31:F0)
Offset Address: 80h Attribute: R/W
Default Value: 0000h Size: 16 bit
Bit Description
15:13 Reserved
12
FDD Decode Range—R/W. Determines which range to decode for the FDD Port
0 = 3F0h–3F5h, 3F7h (Primary)
1 = 370h–375h, 377h (Secondary)
11:10 Reserved
9:8
LPT Decode Range—R/W. This field determines which range to decode for the LPT
Port.
00 = 378h–37Fh and 778h–77Fh
01 = 278h–27Fh (port 279h is read only) and 678h–67Fh
10 = 3BCh –3BEh and 7BCh–7BEh
11 = Reserved
7Reserved
6:4
COMB Decode Range—R/W. This field determines which range to decode for the
COMB Port.
000 = 3F8h–3FFh (COM1)
001 = 2F8h–2FFh (COM2)
010 = 220h–227h
011 = 228h–22Fh
100 = 238h–23Fh
101 = 2E8h–2EFh (COM4)
110 = 338h–33Fh
111 = 3E8h–3EFh (COM3)
3Reserved
2:0
COMA Decode Range—R/W. This field determines which range to decode for the
COMA Port.
000 = 3F8h–3FFh (COM1)
001 = 2F8h–2FFh (COM2)
010 = 220h–227h
011 = 228h–22Fh
100 = 238h–23Fh
101 = 2E8h–2EFh (COM4)
110 = 338h–33Fh
111 = 3E8h–3EFh (COM3)
LPC Interface Bridge Registers (D31:F0)
480 Datasheet
13.1.23 LPC_EN—LPC I/F Enables Register (LPC I/F—D31:F0)
Offset Address: 82h83h Attribute: R/W
Default Value: 0000h Size: 16 bit
Power Well: Core
Bit Description
15:14 Reserved
13
CNF2_LPC_EN—R/W. Microcontroller Enable # 2.
0 = Disable.
1 = Enables the decoding of the I/O locations 4Eh and 4Fh to the LPC interface. This
range is used for a microcontroller.
12
CNF1_LPC_EN—R/W. Super I/O Enable.
0 = Disable.
1 = Enables the decoding of the I/O locations 2Eh and 2Fh to the LPC interface. This
range is used for Super I/O devices.
11
MC_LPC_EN—R/W. Microcontroller Enable # 1.
0 = Disable.
1 = Enables the decoding of the I/O locations 62h and 66h to the LPC interface. This
range is used for a microcontroller.
10
KBC_LPC_EN—R/W. Keyboard Enable.
0 = Disable.
1 = Enables the decoding of the I/O locations 60h and 64h to the LPC interface. This
range is used for a microcontroller.
9
GAMEH_LPC_EN—R/W. High Gameport Enable
0 = Disable.
1 = Enables the decoding of the I/O locations 208h to 20Fh to the LPC interface. This
range is used for a gameport.
8
GAMEL_LPC_EN—R/W. Low Gameport Enable
0 = Disable.
1 = Enables the decoding of the I/O locations 200h to 207h to the LPC interface. This
range is used for a gameport.
7:4 Reserved
3
FDD_LPC_EN—R/W. Floppy Drive Enable
0 = Disable.
1 = Enables the decoding of the FDD range to the LPC interface. This range is selected
in the LPC_FDD/LPT Decode Range Register (D31:F0:80h, bit 12).
2
LPT_LPC_EN—R/W. Parallel Port Enable
0 = Disable.
1 = Enables the decoding of the LPTrange to the LPC interface. This range is selected in
the LPC_FDD/LPT Decode Range Register (D31:F0:80h, bit 9:8).
1
COMB_LPC_EN—R/W. Com Port B Enable
0 = Disable.
1 = Enables the decoding of the COMB range to the LPC interface. This range is
selected in the LPC_COM Decode Range Register (D31:F0:80h, bits 6:4).
0
COMA_LPC_EN—R/W. Com Port A Enable
0 = Disable.
1 = Enables the decoding of the COMA range to the LPC interface. This range is
selected in the LPC_COM Decode Range Register (D31:F0:80h, bits 3:2).
Datasheet 481
LPC Interface Bridge Registers (D31:F0)
13.1.24 GEN1_DEC—LPC I/F Generic Decode Range 1 Register
(LPC I/F—D31:F0)
Offset Address: 84h87h Attribute: R/W
Default Value: 00000000h Size: 32 bit
Power Well: Core
13.1.25 GEN2_DEC—LPC I/F Generic Decode Range 2 Register
(LPC I/F—D31:F0)
Offset Address: 88h8Bh Attribute: R/W
Default Value: 00000000h Size: 32 bit
Power Well: Core
Bit Description
31:24 Reserved
23:18
Generic I/O Decode Range Address[7:2] Mask—R/W. A 1 in any bit position
indicates that any value in the corresponding address bit in a received cycle will be
treated as a match. The corresponding bit in the Address field, below, is ignored. The
mask is only provided for the lower 6 bits of the DWord address, allowing for decoding
blocks up to 256 bytes in size.
17:16 Reserved
15:2 Generic I/O Decode Range 1 Base Address (GEN1_BASE)R/W.
NOTE: The PCH Does not provide decode down to the word or byte level
1Reserved
0
Generic Decode Range 1 Enable (GEN1_EN)—R/W.
0 = Disable.
1 = Enable the GEN1 I/O range to be forwarded to the LPC I/F
Bit Description
31:24 Reserved
23:18
Generic I/O Decode Range Address[7:2] Mask—R/W. A 1 in any bit position
indicates that any value in the corresponding address bit in a received cycle will be
treated as a match. The corresponding bit in the Address field, below, is ignored. The
mask is only provided for the lower 6 bits of the DWord address, allowing for decoding
blocks up to 256 bytes in size.
17:16 Reserved
15:2 Generic I/O Decode Range 2 Base Address (GEN1_BASE)R/W.
NOTE: The PCH does not provide decode down to the word or byte level.
1Reserved
0
Generic Decode Range 2 Enable (GEN2_EN)—R/W.
0 = Disable.
1 = Enable the GEN2 I/O range to be forwarded to the LPC I/F
LPC Interface Bridge Registers (D31:F0)
482 Datasheet
13.1.26 GEN3_DEC—LPC I/F Generic Decode Range 3 Register
(LPC I/F—D31:F0)
Offset Address: 8Ch–8Eh Attribute: R/W
Default Value: 00000000h Size: 32 bit
Power Well: Core
13.1.27 GEN4_DEC—LPC I/F Generic Decode Range 4 Register
(LPC I/F—D31:F0)
Offset Address: 90h–93h Attribute: R/W
Default Value: 00000000h Size: 32 bit
Power Well: Core
Bit Description
31:24 Reserved
23:18
Generic I/O Decode Range Address[7:2] Mask—R/W. A 1 in any bit position
indicates that any value in the corresponding address bit in a received cycle will be
treated as a match. The corresponding bit in the Address field, below, is ignored. The
mask is only provided for the lower 6 bits of the DWord address, allowing for decoding
blocks up to 256 bytes in size.
17:16 Reserved
15:2 Generic I/O Decode Range 3 Base Address (GEN3_BASE)—R/W.
NOTE: The PCH Does not provide decode down to the word or byte level
1 Reserved
0
Generic Decode Range 3 Enable (GEN3_EN)—R/W.
0 = Disable.
1 = Enable the GEN3 I/O range to be forwarded to the LPC I/F
Bit Description
31:24 Reserved
23:18
Generic I/O Decode Range Address[7:2] Mask—R/W. A 1 in any bit position
indicates that any value in the corresponding address bit in a received cycle will be
treated as a match. The corresponding bit in the Address field, below, is ignored. The
mask is only provided for the lower 6 bits of the DWord address, allowing for decoding
blocks up to 256 bytes in size.
17:16 Reserved
15:2 Generic I/O Decode Range 4 Base Address (GEN4_BASE)—R/W.
NOTE: The PCH Does not provide decode down to the word or byte level
1 Reserved
0
Generic Decode Range 4 Enable (GEN4_EN)—R/W.
0 = Disable.
1 = Enable the GEN4 I/O range to be forwarded to the LPC I/F
Datasheet 483
LPC Interface Bridge Registers (D31:F0)
13.1.28 ULKMC—USB Legacy Keyboard / Mouse Control
Register (LPC I/F—D31:F0)
Offset Address: 94h–97h Attribute: RO, RWC, R/W
Default Value: 00002000h Size: 32 bit
Power Well: Core
Bit Description
31:16 Reserved
15
SMI Caused by End of Pass-Through (SMIBYENDPS)—R/WC. This bit indicates if
the event occurred. Note that even if the corresponding enable bit is not set in bit 7,
then this bit will still be active. It is up to the SMM code to use the enable bit to
determine the exact cause of the SMI#.
0 = Software clears this bit by writing a 1 to the bit location in any of the controllers.
1 = Event Occurred
14:12 Reserved
11
SMI Caused by Port 64 Write (TRAPBY64W)R/WC. This bit indicates if the event
occurred. Note that even if the corresponding enable bit is not set in bit 3, this bit will
still be active. It is up to the SMM code to use the enable bit to determine the exact
cause of the SMI#. Note that the A20Gate Pass-Through Logic allows specific port 64h
writes to complete without setting this bit.
0 = Software clears this bit by writing a 1 to the bit location in any of the controllers.
1 = Event Occurred.
10
SMI Caused by Port 64 Read (TRAPBY64R)—R/WC. This bit indicates if the event
occurred. Note that even if the corresponding enable bit is not set in bit 2, this bit will
still be active. It is up to the SMM code to use the enable bit to determine the exact
cause of the SMI#.
0 = Software clears this bit by writing a 1 to the bit location in any of the controllers.
1 = Event Occurred.
9
SMI Caused by Port 60 Write (TRAPBY60W)R/WC. This bit indicates if the event
occurred. Note that even if the corresponding enable bit is not set in bit 1, this bit will
still be active. It is up to the SMM code to use the enable bit to determine the exact
cause of the SMI#. Note that the A20Gate Pass-Through Logic allows specific port 64h
writes to complete without setting this bit.
0 = Software clears this bit by writing a 1 to the bit location in any of the controllers.
1 = Event Occurred.
8
SMI Caused by Port 60 Read (TRAPBY60R)—R/WC. This bit indicates if the event
occurred. Note that even if the corresponding enable bit is not set in the bit 0, then this
bit will still be active. It is up to the SMM code to use the enable bit to determine the
exact cause of the SMI#.
0 = Software clears this bit by writing a 1 to the bit location in any of the controllers.
1 = Event Occurred.
7
SMI at End of Pass-Through Enable (SMIATENDPS)—R/W. This bit enables SMI at
the end of a pass-through. This can occur if an SMI is generated in the middle of a
pass-through, and needs to be serviced later.
0 = Disable
1 = Enable
6
Pass Through State (PSTATE)—RO.
0 = If software needs to reset this bit, it should set bit 5 in all of the host controllers to
0.
1 = Indicates that the state machine is in the middle of an A20GATE pass-through
sequence.
LPC Interface Bridge Registers (D31:F0)
484 Datasheet
13.1.29 LGMR—LPC I/F Generic Memory Range Register
(LPC I/F—D31:F0)
Offset Address: 98h–9Bh Attribute: R/W
Default Value: 00000000h Size: 32 bit
Power Well: Core
5
A20Gate Pass-Through Enable (A20PASSEN)—R/W.
0 = Disable.
1 = Enable. Allows A20GATE sequence Pass-Through function. A specific cycle
sequence involving writes to port 60h and 64h does not result in the setting of the
SMI status bits.
4
SMI on USB IRQ Enable (USBSMIEN)—R/W.
0 = Disable
1 = Enable. USB interrupt will cause an SMI event.
3
SMI on Port 64 Writes Enable (64WEN)R/W.
0 = Disable
1 = Enable. A 1 in bit 11 will cause an SMI event.
2
SMI on Port 64 Reads Enable (64REN)—R/W.
0 = Disable
1 = Enable. A 1 in bit 10 will cause an SMI event.
1
SMI on Port 60 Writes Enable (60WEN)R/W.
0 = Disable
1 = Enable. A 1 in bit 9 will cause an SMI event.
0
SMI on Port 60 Reads Enable (60REN)—R/W.
0 = Disable
1 = Enable. A 1 in bit 8 will cause an SMI event.
Bit Description
Bit Description
31:16
Memory Address[31:16]—R/W. This field specifies a 64 KB memory block anywhere
in the 4 GB memory space that will be decoded to LPC as standard LPC memory cycle if
enabled.
15:1 Reserved
0LPC Memory Range Decode Enable—R/W. When this bit is set to 1, then the range
specified in bits 31:16 of this register is enabled for decoding to LPC.
Datasheet 485
LPC Interface Bridge Registers (D31:F0)
13.1.30 FWH_SEL1—Firmware Hub Select 1 Register
(LPC I/F—D31:F0)
Offset Address: D0hD3h Attribute: R/W, RO
Default Value: 00112233h Size: 32 bits
Bit Description
31:28
FWH_F8_IDSEL—RO. IDSEL for two 512-KB Firmware Hub memory ranges and one
128-KB memory range. This field is fixed at 0000. The IDSEL programmed in this field
addresses the following memory ranges:
FFF8 0000h–FFFF FFFFh
FFB8 0000h–FFBF FFFFh
000E 0000h–000F FFFFh
27:24
FWH_F0_IDSEL—R/W. IDSEL for two 512-KB Firmware Hub memory ranges. The
IDSEL programmed in this field addresses the following memory ranges:
FFF0 0000h–FFF7 FFFFh
FFB0 0000h–FFB7 FFFFh
23:20
FWH_E8_IDSELR/W. IDSEL for two 512-KB Firmware Hub memory ranges. The
IDSEL programmed in this field addresses the following memory ranges:
FFE8 0000h–FFEF FFFFh
FFA8 0000h–FFAF FFFFh
19:16
FWH_E0_IDSELR/W. IDSEL for two 512-KB Firmware Hub memory ranges. The
IDSEL programmed in this field addresses the following memory ranges:
FFE0 0000h–FFE7 FFFFh
FFA0 0000h–FFA7 FFFFh
15:12
FWH_D8_IDSEL—R/W. IDSEL for two 512-KB Firmware Hub memory ranges. The
IDSEL programmed in this field addresses the following memory ranges:
FFD8 0000h–FFDF FFFFh
FF98 0000h–FF9F FFFFh
11:8
FWH_D0_IDSEL—R/W. IDSEL for two 512-KB Firmware Hub memory ranges. The
IDSEL programmed in this field addresses the following memory ranges:
FFD0 0000h–FFD7 FFFFh
FF90 0000h–FF97 FFFFh
7:4
FWH_C8_IDSEL—R/W. IDSEL for two 512-KB Firmware Hub memory ranges. The
IDSEL programmed in this field addresses the following memory ranges:
FFC8 0000h–FFCF FFFFh
FF88 0000h–FF8F FFFFh
3:0
FWH_C0_IDSEL—R/W. IDSEL for two 512-KB Firmware Hub memory ranges. The
IDSEL programmed in this field addresses the following memory ranges:
FFC0 0000h–FFC7 FFFFh
FF80 0000h–FF87 FFFFh
LPC Interface Bridge Registers (D31:F0)
486 Datasheet
13.1.31 FWH_SEL2—Firmware Hub Select 2 Register
(LPC I/F—D31:F0)
Offset Address: D4hD5h Attribute: R/W
Default Value: 4567h Size: 16 bits
Bit Description
15:12
FWH_70_IDSEL—R/W. IDSEL for two, 1-M Firmware Hub memory ranges. The IDSEL
programmed in this field addresses the following memory ranges:
FF70 0000h–FF7F FFFFh
FF30 0000h–FF3F FFFFh
11:8
FWH_60_IDSEL—R/W. IDSEL for two, 1-M Firmware Hub memory ranges. The IDSEL
programmed in this field addresses the following memory ranges:
FF60 0000h–FF6F FFFFh
FF20 0000h–FF2F FFFFh
7:4
FWH_50_IDSEL—R/W. IDSEL for two, 1-M Firmware Hub memory ranges. The IDSEL
programmed in this field addresses the following memory ranges:
FF50 0000h–FF5F FFFFh
FF10 0000h–FF1F FFFFh
3:0
FWH_40_IDSEL—R/W. IDSEL for two, 1-M Firmware Hub memory ranges. The IDSEL
programmed in this field addresses the following memory ranges:
FF40 0000h–FF4F FFFFh
FF00 0000h–FF0F FFFFh
Datasheet 487
LPC Interface Bridge Registers (D31:F0)
13.1.32 FWH_DEC_EN1—Firmware Hub Decode Enable
Register (LPC I/F—D31:F0)
Offset Address: D8hD9h Attribute: R/W, RO
Default Value: FFCFh Size: 16 bits
Bit Description
15
FWH_F8_EN—RO. This bit enables decoding two 512-KB Firmware Hub memory
ranges, and one 128-KB memory range.
0 = Disable
1 = Enable the following ranges for the Firmware Hub
FFF80000h–FFFFFFFFh
FFB80000h–FFBFFFFFh
14
FWH_F0_EN—R/W. This bit enables decoding two 512-KB Firmware Hub memory
ranges.
0 = Disable.
1 = Enable the following ranges for the Firmware Hub:
FFF00000h–FFF7FFFFh
FFB00000h–FFB7FFFFh
13
FWH_E8_EN—R/W. This bit enables decoding two 512-KB Firmware Hub memory
ranges.
0 = Disable.
1 = Enable the following ranges for the Firmware Hub:
FFE80000h–FFEFFFFh
FFA80000h–FFAFFFFFh
12
FWH_E0_EN—R/W. This bit enables decoding two 512-KB Firmware Hub memory
ranges.
0 = Disable.
1 = Enable the following ranges for the Firmware Hub:
FFE00000h–FFE7FFFFh
FFA00000h–FFA7FFFFh
11
FWH_D8_EN—R/W. This bit enables decoding two 512-KB Firmware Hub memory
ranges.
0 = Disable.
1 = Enable the following ranges for the Firmware Hub
FFD80000h–FFDFFFFFh
FF980000h–FF9FFFFFh
10
FWH_D0_EN—R/W. This bit enables decoding two 512-KB Firmware Hub memory
ranges.
0 = Disable.
1 = Enable the following ranges for the Firmware Hub
FFD00000h–FFD7FFFFh
FF900000h–FF97FFFFh
9
FWH_C8_EN—R/W. This bit enables decoding two 512-KB Firmware Hub memory
ranges.
0 = Disable.
1 = Enable the following ranges for the Firmware Hub
FFC80000h–FFCFFFFFh
FF880000h–FF8FFFFFh
8
FWH_C0_EN—R/W. This bit enables decoding two 512-KB Firmware Hub memory
ranges.
0 = Disable.
1 = Enable the following ranges for the Firmware Hub
FFC00000h–FFC7FFFFh
FF800000h–FF87FFFFh
LPC Interface Bridge Registers (D31:F0)
488 Datasheet
NOTE: This register effects the BIOS decode regardless of whether the BIOS is resident on LPC or
SPI. The concept of Feature Space does not apply to SPI-based flash. The PCH simply
decodes these ranges as memory accesses when enabled for the SPI flash interface.
7
FWH_Legacy_F_EN—R/W. This enables the decoding of the legacy 64KB range at
F0000h–FFFFFh.
0 = Disable.
1 = Enable the following legacy ranges for the Firmware Hub
F0000h–FFFFFh
NOTE: The decode for the BIOS legacy F segment is enabled only by this bit and is not
affected by the GEN_PMCON_1.iA64_EN bit.
6
FWH_Legacy_E_EN—R/W. This enables the decoding of the legacy 64KB range at
E0000h–EFFFFh.
0 = Disable.
1 = Enable the following legacy ranges for the Firmware Hub
E0000h–EFFFFh
NOTE: The decode for the BIOS legacy E segment is enabled only by this bit and is not
affected by the GEN_PMCON_1.iA64_EN bit.
5:4 Reserved
3
FWH_70_EN—R/W. Enables decoding two 1-M Firmware Hub memory ranges.
0 = Disable.
1 = Enable the following ranges for the Firmware Hub
FF70 0000h–FF7F FFFFh
FF30 0000h–FF3F FFFFh
2
FWH_60_EN—R/W. Enables decoding two 1-M Firmware Hub memory ranges.
0 = Disable.
1 = Enable the following ranges for the Firmware Hub
FF60 0000h–FF6F FFFFh
FF20 0000h–FF2F FFFFh
1
FWH_50_EN—R/W. Enables decoding two 1-M Firmware Hub memory ranges.
0 = Disable.
1 = Enable the following ranges for the Firmware Hub
FF50 0000h–FF5F FFFFh
FF10 0000h–FF1F FFFFh
0
FWH_40_EN—R/W. Enables decoding two 1-M Firmware Hub memory ranges.
0 = Disable.
1 = Enable the following ranges for the Firmware Hub
FF40 0000h–FF4F FFFFh
FF00 0000h–FF0F FFFFh
Bit Description
Datasheet 489
LPC Interface Bridge Registers (D31:F0)
13.1.33 BIOS_CNTL—BIOS Control Register
(LPC I/F—D31:F0)
Offset Address: DCh Attribute: R/WLO, R/W, RO
Default Value: 20h Size: 8 bit
Lockable: No Power Well: Core
Bit Description
7:6 Reserved
5
SMM BIOS Write Protect Disable (SMM_BWP)—R/WLO.
This bit set defines when the BIOS region can be written by the host.
0 = BIOS region SMM protection is disabled. The BIOS Region is writable regardless if
Processors are in SMM or not. (Set this field to 0 for legacy behavior)
1 = BIOS region SMM protection is enabled. The BIOS Region is not writable unless all
Processors are in SMM.
4Top Swap Status (TSS)—RO. This bit provides a read-only path to view the state of
the Top Swap bit that is at offset 3414h, bit 0.
3:2
SPI Read Configuration (SRC)—R/W. This 2-bit field controls two policies related to
BIOS reads on the SPI interface:
Bit 3- Prefetch Enable
Bit 2- Cache Disable
Settings are summarized below:
1
BIOS Lock Enable (BLE)—R/WLO.
0 = Setting the BIOSWE will not cause SMIs.
1 = Enables setting the BIOSWE bit to cause SMIs. Once set, this bit can only be
cleared by a PLTRST#
0
BIOS Write Enable (BIOSWE)—R/W.
0 = Only read cycles result in Firmware Hub I/F cycles.
1 = Access to the BIOS space is enabled for both read and write cycles. When this bit is
written from a 0 to a 1 and BIOS Lock Enable (BLE) is also set, an SMI# is
generated. This ensures that only SMI code can update BIOS.
p
00b
No prefetching, but caching enabled. 64B demand reads load
the read buffer cache with “valid” data, allowing repeated code
fetches to the same line to complete quickly
01b
No prefetching and no caching. One-to-one correspondence of
host BIOS reads to SPI cycles. This value can be used to invalidate
the cache.
10b Prefetching and Caching enabled. This mode is used for long
sequences of short reads to consecutive addresses (i.e, shadowing).
11b Reserved. This is an invalid configuration, caching must be
enabled when prefetching is enabled.
LPC Interface Bridge Registers (D31:F0)
490 Datasheet
13.1.34 FDCAP—Feature Detection Capability ID
Register (LPC I/F—D31:F0)
Offset Address: E0h–E1h Attribute: RO
Default Value: 0009h Size: 16 bit
Power Well: Core
13.1.35 FDLEN—Feature Detection Capability Length
Register (LPC I/F—D31:F0)
Offset Address: E2h Attribute: RO
Default Value: 0Ch Size: 8 bit
Power Well: Core
13.1.36 FDVER—Feature Detection Version
Register (LPC I/F—D31:F0)
Offset Address: E3h Attribute: RO
Default Value: 10h Size: 8 bit
Power Well: Core
Bit Description
15:8 Next Item Pointer (NEXT)—RO. Configuration offset of the next Capability Item. 00h
indicates the last item in the Capability List.
7:0 Capability ID—RO. Indicates a Vendor Specific Capability
Bit Description
7:0 Capability Length—RO. Indicates the length of this Vendor Specific capability, as
required by PCI Specification.
Bit Description
7:4
Vendor-Specific Capability ID—RO. A value of 1h in this 4-bit field identifies this
Capability as Feature Detection Type. This field allows software to differentiate the
Feature Detection Capability from other Vendor-Specific capabilities
3:0 Capability Version—RO. This field indicates the version of the Feature Detection
capability
Datasheet 491
LPC Interface Bridge Registers (D31:F0)
13.1.37 FDVCT—Feature Vector Register
(LPC I/F—D31:F0)
Offset Address: E4h–EBh Attribute: RO
Default Value: See Description Size: 64 bit
Power Well: Core
13.1.38 RCBA—Root Complex Base Address Register
(LPC I/F—D31:F0)
Offset Address: F0–F3h Attribute: R/W
Default Value: 00000000h Size: 32 bit
Bit Description
63:45 Reserved
44
Intel® Identity Protection Technology—RO
0 = Capable
1 = Disabled
43:14 Reserved
13
USB* 2.0 Ports 6 and 7—RO
0 = Capable
1 = Disabled
12 Reserved
11
PCI Express* Ports 7and 8—RO
0 = Capable
1 = Disabled
10:7 Reserved
6
SATA Ports 2 and 3—RO
0 = Capable
1 = Disabled
5
SATA RAID 0/1/5/10 Capability—RO
0 = Capable
1 = Disabled
4:0 Reserved
Bit Description
31:14 Base Address (BA)—R/W. Base Address for the root complex register block decode
range. This address is aligned on a 16-KB boundary.
13:1 Reserved
0Enable (EN)—R/W. When set, this bit enables the range specified in BA to be claimed
as the Root Complex Register Block.
LPC Interface Bridge Registers (D31:F0)
492 Datasheet
13.2 DMA I/O Registers
Table 13-2. DMA Registers (Sheet 1 of 2)
Port Alias Register Name Default Type
00h 10h Channel 0 DMA Base & Current Address Undefined R/W
01h 11h Channel 0 DMA Base & Current Count Undefined R/W
02h 12h Channel 1 DMA Base & Current Address Undefined R/W
03h 13h Channel 1 DMA Base & Current Count Undefined R/W
04h 14h Channel 2 DMA Base & Current Address Undefined R/W
05h 15h Channel 2 DMA Base & Current Count Undefined R/W
06h 16h Channel 3 DMA Base & Current Address Undefined R/W
07h 17h Channel 3 DMA Base & Current Count Undefined R/W
08h 18h Channel 0–3 DMA Command Undefined WO
Channel 0–3 DMA Status Undefined RO
0Ah 1Ah Channel 0–3 DMA Write Single Mask 000001XXb WO
0Bh 1Bh Channel 0–3 DMA Channel Mode 000000XXb WO
0Ch 1Ch Channel 0–3 DMA Clear Byte Pointer Undefined WO
0Dh 1Dh Channel 0–3 DMA Master Clear Undefined WO
0Eh 1Eh Channel 0–3 DMA Clear Mask Undefined WO
0Fh 1Fh Channel 0–3 DMA Write All Mask 0Fh R/W
80h 90h Reserved Page Undefined R/W
81h 91h Channel 2 DMA Memory Low Page Undefined R/W
82h Channel 3 DMA Memory Low Page Undefined R/W
83h 93h Channel 1 DMA Memory Low Page Undefined R/W
84h–86h 94h–96h Reserved Pages Undefined R/W
87h 97h Channel 0 DMA Memory Low Page Undefined R/W
88h 98h Reserved Page Undefined R/W
89h 99h Channel 6 DMA Memory Low Page Undefined R/W
8Ah 9Ah Channel 7 DMA Memory Low Page Undefined R/W
8Bh 9Bh Channel 5 DMA Memory Low Page Undefined R/W
8Ch–8Eh 9Ch–9Eh Reserved Page Undefined R/W
8Fh 9Fh Refresh Low Page Undefined R/W
C0h C1h Channel 4 DMA Base & Current Address Undefined R/W
C2h C3h Channel 4 DMA Base & Current Count Undefined R/W
C4h C5h Channel 5 DMA Base & Current Address Undefined R/W
C6h C7h Channel 5 DMA Base & Current Count Undefined R/W
C8h C9h Channel 6 DMA Base & Current Address Undefined R/W
CAh CBh Channel 6 DMA Base & Current Count Undefined R/W
CCh CDh Channel 7 DMA Base & Current Address Undefined R/W
CEh CFh Channel 7 DMA Base & Current Count Undefined R/W
Datasheet 493
LPC Interface Bridge Registers (D31:F0)
13.2.1 DMABASE_CA—DMA Base and Current Address Registers
I/O Address: Ch. #0 = 00h; Ch. #1 = 02h Attribute: R/W
Ch. #2 = 04h; Ch. #3 = 06h Size: 16 bit (per channel),
Ch. #5 = C4h Ch. #6 = C8h but accessed in two 8-bit
Ch. #7 = CCh; quantities
Default Value: Undefined
Lockable: No Power Well:Core
D0h D1h Channel 4–7 DMA Command Undefined WO
Channel 4–7 DMA Status Undefined RO
D4h D5h Channel 4–7 DMA Write Single Mask 000001XXb WO
D6h D7h Channel 4–7 DMA Channel Mode 000000XXb WO
D8h D9h Channel 4–7 DMA Clear Byte Pointer Undefined WO
DAh DBh Channel 4–7 DMA Master Clear Undefined WO
DCh DDh Channel 4–7 DMA Clear Mask Undefined WO
DEh DFh Channel 4–7 DMA Write All Mask 0Fh R/W
Table 13-2. DMA Registers (Sheet 2 of 2)
Port Alias Register Name Default Type
Bit Description
15:0
Base and Current Address—R/W. This register determines the address for the
transfers to be performed. The address specified points to two separate registers. On
writes, the value is stored in the Base Address register and copied to the Current
Address register. On reads, the value is returned from the Current Address register.
The address increments/decrements in the Current Address register after each transfer,
depending on the mode of the transfer. If the channel is in auto-initialize mode, the
Current Address register will be reloaded from the Base Address register after a
terminal count is generated.
For transfers to/from a 16-bit slave (channels 5–7), the address is shifted left one bit
location. Bit 15 will be shifted into Bit 16.
The register is accessed in 8 bit quantities. The byte is pointed to by the current byte
pointer flip/flop. Before accessing an address register, the byte pointer flip/flop should
be cleared to ensure that the low byte is accessed first
LPC Interface Bridge Registers (D31:F0)
494 Datasheet
13.2.2 DMABASE_CC—DMA Base and Current Count Registers
I/O Address: Ch. #0 = 01h; Ch. #1 = 03h Attribute: R/W
Ch. #2 = 05h; Ch. #3 = 07h Size: 16-bit (per channel),
Ch. #5 = C6h; Ch. #6 = CAh but accessed in two 8-bit
Ch. #7 = CEh; quantities
Default Value: Undefined
Lockable: No Power Well:Core
13.2.3 DMAMEM_LP—DMA Memory Low Page Registers
I/O Address: Ch. #0 = 87h; Ch. #1 = 83h
Ch. #2 = 81h; Ch. #3 = 82h
Ch. #5 = 8Bh; Ch. #6 = 89h
Ch. #7 = 8Ah; Attribute: R/W
Default Value: Undefined Size: 8-bit
Lockable: No Power Well: Core
Bit Description
15:0
Base and Current Count—R/W. This register determines the number of transfers to
be performed. The address specified points to two separate registers. On writes, the
value is stored in the Base Count register and copied to the Current Count register. On
reads, the value is returned from the Current Count register.
The actual number of transfers is one more than the number programmed in the Base
Count Register (that is, programming a count of 4h results in 5 transfers). The count is
decrements in the Current Count register after each transfer. When the value in the
register rolls from 0 to FFFFh, a terminal count is generated. If the channel is in auto-
initialize mode, the Current Count register will be reloaded from the Base Count
register after a terminal count is generated.
For transfers to/from an 8-bit slave (channels 0–3), the count register indicates the
number of bytes to be transferred. For transfers to/from a 16-bit slave (channels 5–7),
the count register indicates the number of words to be transferred.
The register is accessed in 8 bit quantities. The byte is pointed to by the current byte
pointer flip/flop. Before accessing a count register, the byte pointer flip/flop should be
cleared to ensure that the low byte is accessed first.
Bit Description
7:0
DMA Low Page (ISA Address bits [23:16])—R/W. This register works in conjunction
with the DMA controller's Current Address Register to define the complete 24-bit
address for the DMA channel. This register remains static throughout the DMA transfer.
Bit 16 of this register is ignored when in 16 bit I/O count by words mode as it is
replaced by the bit 15 shifted out from the current address register.
Datasheet 495
LPC Interface Bridge Registers (D31:F0)
13.2.4 DMACMD—DMA Command Register
I/O Address: Ch. #03 = 08h;
Ch. #47 = D0h Attribute: WO
Default Value: Undefined Size: 8-bit
Lockable: No Power Well: Core
13.2.5 DMASTA—DMA Status Register
I/O Address: Ch. #03 = 08h;
Ch. #47 = D0h Attribute: RO
Default Value: Undefined Size: 8-bit
Lockable: No Power Well: Core
Bit Description
7:5 Reserved. Must be 0.
4
DMA Group Arbitration Priority—WO. Each channel group is individually assigned
either fixed or rotating arbitration priority. At part reset, each group is initialized in
fixed priority.
0 = Fixed priority to the channel group
1 = Rotating priority to the group.
3 Reserved. Must be 0.
2
DMA Channel Group Enable—WO. Both channel groups are enabled following part
reset.
0 = Enable the DMA channel group.
1 = Disable. Disabling channel group 4–7 also disables channel group 0–3, which is
cascaded through channel 4.
1:0 Reserved. Must be 0.
Bit Description
7:4
Channel Request Status—RO. When a valid DMA request is pending for a channel,
the corresponding bit is set to 1. When a DMA request is not pending for a particular
channel, the corresponding bit is set to 0. The source of the DREQ may be hardware or
a software request. Note that channel 4 is the cascade channel, so the request status of
channel 4 is a logical OR of the request status for channels 0 through 3.
4 = Channel 0
5 = Channel 1 (5)
6 = Channel 2 (6)
7 = Channel 3 (7)
3:0
Channel Terminal Count Status—RO. When a channel reaches terminal count (TC),
its status bit is set to 1. If TC has not been reached, the status bit is set to 0. Channel 4
is programmed for cascade, so the TC bit response for channel 4 is irrelevant:
0 = Channel 0
1 = Channel 1 (5)
2 = Channel 2 (6)
3 = Channel 3 (7)
LPC Interface Bridge Registers (D31:F0)
496 Datasheet
13.2.6 DMA_WRSMSK—DMA Write Single Mask Register
I/O Address: Ch. #03 = 0Ah;
Ch. #47 = D4h Attribute: WO
Default Value: 0000 01xx Size: 8-bit
Lockable: No Power Well: Core
Bit Description
7:3 Reserved. Must be 0.
2
Channel Mask Select—WO.
0 = Enable DREQ for the selected channel. The channel is selected through bits [1:0].
Therefore, only one channel can be masked / unmasked at a time.
1 = Disable DREQ for the selected channel.
1:0
DMA Channel Select—WO. These bits select the DMA Channel Mode Register to
program.
00 = Channel 0 (4)
01 = Channel 1 (5)
10 = Channel 2 (6)
11 = Channel 3 (7)
Datasheet 497
LPC Interface Bridge Registers (D31:F0)
13.2.7 DMACH_MODE—DMA Channel Mode Register
I/O Address: Ch. #03 = 0Bh;
Ch. #47 = D6h Attribute: WO
Default Value: 0000 00xx Size: 8-bit
Lockable: No Power Well: Core
Bit Description
7:6
DMA Transfer Mode—WO. Each DMA channel can be programmed in one of four
different modes:
00 = Demand mode
01 = Single mode
10 = Reserved
11 = Cascade mode
5
Address Increment/Decrement Select—WO. This bit controls address increment/
decrement during DMA transfers.
0 = Address increment. (default after part reset or Master Clear)
1 = Address decrement.
4
Autoinitialize Enable—WO.
0 = Autoinitialize feature is disabled and DMA transfers terminate on a terminal count.
A part reset or Master Clear disables autoinitialization.
1 = DMA restores the Base Address and Count registers to the current registers
following a terminal count (TC).
3:2
DMA Transfer Type—WO. These bits represent the direction of the DMA transfer.
When the channel is programmed for cascade mode, (bits[7:6] = 11) the transfer type
is irrelevant.
00 = Verify – No I/O or memory strobes generated
01 = Write – Data transferred from the I/O devices to memory
10 = Read – Data transferred from memory to the I/O device
11 = Invalid
1:0
DMA Channel Select—WO. These bits select the DMA Channel Mode Register that will
be written by bits [7:2].
00 = Channel 0 (4)
01 = Channel 1 (5)
10 = Channel 2 (6)
11 = Channel 3 (7)
LPC Interface Bridge Registers (D31:F0)
498 Datasheet
13.2.8 DMA Clear Byte Pointer Register
I/O Address: Ch. #03 = 0Ch;
Ch. #47 = D8h Attribute: WO
Default Value: xxxx xxxx Size: 8-bit
Lockable: No Power Well: Core
13.2.9 DMA Master Clear Register
I/O Address: Ch. #03 = 0Dh;
Ch. #47 = DAh Attribute: WO
Default Value: xxxx xxxx Size: 8-bit
13.2.10 DMA_CLMSK—DMA Clear Mask Register
I/O Address: Ch. #03 = 0Eh;
Ch. #47 = DCh Attribute: WO
Default Value: xxxx xxxx Size: 8-bit
Lockable: No Power Well: Core
Bit Description
7:0
Clear Byte Pointer—WO. No specific pattern. Command enabled with a write to the I/
O port address. Writing to this register initializes the byte pointer flip/flop to a known
state. It clears the internal latch used to address the upper or lower byte of the 16-bit
Address and Word Count Registers. The latch is also cleared by part reset and by the
Master Clear command. This command precedes the first access to a 16-bit DMA
controller register. The first access to a 16-bit register will then access the significant
byte, and the second access automatically accesses the most significant byte.
Bit Description
7:0
Master ClearWO. No specific pattern. Enabled with a write to the port. This has the
same effect as the hardware Reset. The Command, Status, Request, and Byte Pointer
flip/flop registers are cleared and the Mask Register is set.
Bit Description
7:0 Clear Mask Register—WO. No specific pattern. Command enabled with a write to the
port.
Datasheet 499
LPC Interface Bridge Registers (D31:F0)
13.2.11 DMA_WRMSK—DMA Write All Mask Register
I/O Address: Ch. #03 = 0Fh;
Ch. #47 = DEh Attribute: R/W
Default Value: 0000 1111 Size: 8-bit
Lockable: No Power Well: Core
13.3 Timer I/O Registers
Bit Description
7:4 Reserved. Must be 0.
3:0
Channel Mask Bits—R/W. This register permits all four channels to be simultaneously
enabled/disabled instead of enabling/disabling each channel individually, as is the case
with the Mask Register – Write Single Mask Bit. In addition, this register has a read
path to allow the status of the channel mask bits to be read. A channel's mask bit is
automatically set to 1 when the Current Byte/Word Count Register reaches terminal
count (unless the channel is in auto-initialization mode).
Setting the bit(s) to a 1 disables the corresponding DREQ(s). Setting the bit(s) to a 0
enables the corresponding DREQ(s). Bits [3:0] are set to 1 upon part reset or Master
Clear. When read, bits [3:0] indicate the DMA channel [3:0] ([7:4]) mask status.
Bit 0 = Channel 0 (4)1 = Masked, 0 = Not Masked
Bit 1 = Channel 1 (5)1 = Masked, 0 = Not Masked
Bit 2 = Channel 2 (6)1 = Masked, 0 = Not Masked
Bit 3 = Channel 3 (7)1 = Masked, 0 = Not Masked
NOTE: Disabling channel 4 also disables channels 0–3 due to the cascade of channels
0–3 through channel 4.
Port Aliases Register Name Default Value Type
40h 50h Counter 0 Interval Time Status Byte Format 0XXXXXXXb RO
Counter 0 Counter Access Port Undefined R/W
41h 51h Counter 1 Interval Time Status Byte Format 0XXXXXXXb RO
Counter 1 Counter Access Port Undefined R/W
42h 52h Counter 2 Interval Time Status Byte Format 0XXXXXXXb RO
Counter 2 Counter Access Port Undefined R/W
43h 53h
Timer Control Word Undefined WO
Timer Control Word Register XXXXXXX0b WO
Counter Latch Command X0h WO
LPC Interface Bridge Registers (D31:F0)
500 Datasheet
13.3.1 TCW—Timer Control Word Register
I/O Address: 43h Attribute: WO
Default Value: All bits undefined Size: 8 bits
This register is programmed prior to any counter being accessed to specify counter
modes. Following part reset, the control words for each register are undefined and each
counter output is 0. Each timer must be programmed to bring it into a known state.
There are two special commands that can be issued to the counters through this
register, the Read Back Command and the Counter Latch Command. When these
commands are chosen, several bits within this register are redefined. These register
formats are described below:
Bit Description
7:6
Counter SelectWO. The Counter Selection bits select the counter the control word
acts upon as shown below. The Read Back Command is selected when bits[7:6] are
both 1.
00 = Counter 0 select
01 = Counter 1 select
10 = Counter 2 select
11 = Read Back Command
5:4
Read/Write Select—WO. These bits are the read/write control bits. The actual
counter programming is done through the counter port (40h for counter 0, 41h for
counter 1, and 42h for counter 2).
00 = Counter Latch Command
01 = Read/Write Least Significant Byte (LSB)
10 = Read/Write Most Significant Byte (MSB)
11 = Read/Write LSB then MSB
3:1
Counter Mode Selection—WO. These bits select one of six possible modes of
operation for the selected counter.
0
Binary/BCD Countdown Select—WO.
0 = Binary countdown is used. The largest possible binary count is 216
1 = Binary coded decimal (BCD) count is used. The largest possible BCD count is 104
000b Mode 0 Out signal on end of count (=0)
001b Mode 1 Hardware retriggerable one-
shot
x10b Mode 2 Rate generator (divide by n
counter)
x11b Mode 3 Square wave output
100b Mode 4 Software triggered strobe
101b Mode 5 Hardware triggered strobe
Datasheet 501
LPC Interface Bridge Registers (D31:F0)
RDBK_CMD—Read Back Command
The Read Back Command is used to determine the count value, programmed mode,
and current states of the OUT pin and Null count flag of the selected counter or
counters. Status and/or count may be latched in any or all of the counters by selecting
the counter during the register write. The count and status remain latched until read,
and further latch commands are ignored until the count is read. Both count and status
of the selected counters may be latched simultaneously by setting both bit 5 and bit 4
to 0. If both are latched, the first read operation from that counter returns the latched
status. The next one or two reads, depending on whether the counter is programmed
for one or two byte counts, returns the latched count. Subsequent reads return an
unlatched count.
LTCH_CMD—Counter Latch Command
The Counter Latch Command latches the current count value. This command is used to
insure that the count read from the counter is accurate. The count value is then read
from each counter's count register through the Counter Ports Access Ports Register
(40h for counter 0, 41h for counter 1, and 42h for counter 2). The count must be read
according to the programmed format; that is, if the counter is programmed for two
byte counts, two bytes must be read. The two bytes do not have to be read one right
after the other (read, write, or programming operations for other counters may be
inserted between the reads). If a counter is latched once and then latched again before
the count is read, the second Counter Latch Command is ignored.
Bit Description
7:6 Read Back Command. Must be 11 to select the Read Back Command
5
Latch Count of Selected Counters.
0 = Current count value of the selected counters will be latched
1 = Current count will not be latched
4
Latch Status of Selected Counters.
0 = Status of the selected counters will be latched
1 = Status will not be latched
3Counter 2 Select.
1 = Counter 2 count and/or status will be latched
2Counter 1 Select.
1 = Counter 1 count and/or status will be latched
1Counter 0 Select.
1 = Counter 0 count and/or status will be latched.
0 Reserved. Must be 0.
Bit Description
7:6
Counter Selection. These bits select the counter for latching. If “11” is written, then
the write is interpreted as a read back command.
00 = Counter 0
01 = Counter 1
10 = Counter 2
5:4 Counter Latch Command.
00 = Selects the Counter Latch Command.
3:0 Reserved. Must be 0.
LPC Interface Bridge Registers (D31:F0)
502 Datasheet
13.3.2 SBYTE_FMT—Interval Timer Status Byte Format Register
I/O Address: Counter 0 = 40h,
Counter 1 = 41h, Attribute: RO
Counter 2 = 42h Size: 8 bits per counter
Default Value: Bits[6:0] undefined, Bit 7=0
Each counter's status byte can be read following a Read Back Command. If latch status
is chosen (bit 4=0, Read Back Command) as a read back option for a given counter, the
next read from the counter's Counter Access Ports Register (40h for counter 0, 41h for
counter 1, and 42h for counter 2) returns the status byte. The status byte returns the
following:
Bit Description
7
Counter OUT Pin State—RO.
0 = OUT pin of the counter is also a 0
1 = OUT pin of the counter is also a 1
6
Count Register Status—RO. This bit indicates when the last count written to the
Count Register (CR) has been loaded into the counting element (CE). The exact time
this happens depends on the counter mode, but until the count is loaded into the
counting element (CE), the count value will be incorrect.
0 = Count has been transferred from CR to CE and is available for reading.
1 = Null Count. Count has not been transferred from CR to CE and is not yet available
for reading.
5:4
Read/Write Selection Status—RO. These reflect the read/write selection made
through bits[5:4] of the control register. The binary codes returned during the status
read match the codes used to program the counter read/write selection.
00 = Counter Latch Command
01 = Read/Write Least Significant Byte (LSB)
10 = Read/Write Most Significant Byte (MSB)
11 = Read/Write LSB then MSB
3:1
Mode Selection Status—RO. These bits return the counter mode programming. The
binary code returned matches the code used to program the counter mode, as listed
under the bit function above.
000 = Mode 0—Out signal on end of count (=0)
001 = Mode 1—Hardware retriggerable one-shot
x10 = Mode 2—Rate generator (divide by n counter)
x11 = Mode 3—Square wave output
100 = Mode 4—Software triggered strobe
101 = Mode 5—Hardware triggered strobe
0
Countdown Type Status—RO. This bit reflects the current countdown type.
0 = Binary countdown
1 = Binary Coded Decimal (BCD) countdown.
Datasheet 503
LPC Interface Bridge Registers (D31:F0)
13.3.3 Counter Access Ports Register
I/O Address: Counter 0 40h,
Counter 1 41h, Attribute: R/W
Counter 2 42h
Default Value: All bits undefined Size: 8 bit
13.4 8259 Interrupt Controller (PIC) Registers
13.4.1 Interrupt Controller I/O MAP
The interrupt controller registers are located at 20h and 21h for the master controller
(IRQ 0–7), and at A0h and A1h for the slave controller (IRQ 8–13). These registers
have multiple functions, depending upon the data written to them. Table 13-3 shows
the different register possibilities for each address.
Note: See note addressing active-low interrupt sources in 8259 Interrupt Controllers section
(Chapter 5.8).
Bit Description
7:0
Counter Port—R/W. Each counter port address is used to program the 16-bit Count
Register. The order of programming, either LSB only, MSB only, or LSB then MSB, is
defined with the Interval Counter Control Register at port 43h. The counter port is also
used to read the current count from the Count Register, and return the status of the
counter programming following a Read Back Command.
Table 13-3. PIC Registers
Port Aliases Register Name Default
Value Type
20h
24h, 28h,
2Ch, 30h,
34h, 38h, 3Ch
Master PIC ICW1 Init. Cmd Word 1 Undefined WO
Master PIC OCW2 Op Ctrl Word 2 001XXXXXb WO
Master PIC OCW3 Op Ctrl Word 3 X01XXX10b WO
21h
25h, 29h,
2Dh, 31h,
35h, 39h,
3Dh
Master PIC ICW2 Init. Cmd Word 2 Undefined WO
Master PIC ICW3 Init. Cmd Word 3 Undefined WO
Master PIC ICW4 Init. Cmd Word 4 01h WO
Master PIC OCW1 Op Ctrl Word 1 00h R/W
A0h
A4h, A8h,
ACh, B0h,
B4h, B8h,
BCh
Slave PIC ICW1 Init. Cmd Word 1 Undefined WO
Slave PIC OCW2 Op Ctrl Word 2 001XXXXXb WO
Slave PIC OCW3 Op Ctrl Word 3 X01XXX10b WO
A1h
A5h, A9h,
ADh, B1h,
B5h, B9h,
BDh
Slave PIC ICW2 Init. Cmd Word 2 Undefined WO
Slave PIC ICW3 Init. Cmd Word 3 Undefined WO
Slave PIC ICW4 Init. Cmd Word 4 01h WO
Slave PIC OCW1 Op Ctrl Word 1 00h R/W
4D0h Master PIC Edge/Level Triggered 00h R/W
4D1h Slave PIC Edge/Level Triggered 00h R/W
LPC Interface Bridge Registers (D31:F0)
504 Datasheet
13.4.2 ICW1—Initialization Command Word 1 Register
Offset Address: Master Controller 20h Attribute: WO
Slave Controller A0h Size: 8 bit /controller
Default Value: All bits undefined
A write to Initialization Command Word 1 starts the interrupt controller initialization
sequence, during which the following occurs:
1. The Interrupt Mask register is cleared.
2. IRQ7 input is assigned priority 7.
3. The slave mode address is set to 7.
4. Special mask mode is cleared and Status Read is set to IRR.
Once this write occurs, the controller expects writes to ICW2, ICW3, and ICW4 to
complete the initialization sequence.
Bit Description
7:5 ICW/OCW SelectWO. These bits are MCS-85 specific, and not needed.
000 = Should be programmed to “000”
4
ICW/OCW Select—WO.
1 = This bit must be a 1 to select ICW1 and enable the ICW2, ICW3, and ICW4
sequence.
3Edge/Level Bank Select (LTIM)—WO. Disabled. Replaced by the edge/level
triggered control registers (ELCR, D31:F0:4D0h, D31:F0:4D1h).
2ADI—WO.
0 = Ignored for the PCH. Should be programmed to 0.
1Single or Cascade (SNGL)—WO.
0 = Must be programmed to a 0 to indicate two controllers operating in cascade mode.
0
ICW4 Write Required (IC4)—WO.
1 = This bit must be programmed to a 1 to indicate that ICW4 needs to be
programmed.
Datasheet 505
LPC Interface Bridge Registers (D31:F0)
13.4.3 ICW2—Initialization Command Word 2 Register
Offset Address: Master Controller 21h Attribute: WO
Slave Controller A1h Size: 8 bit /controller
Default Value: All bits undefined
ICW2 is used to initialize the interrupt controller with the five most significant bits of
the interrupt vector address. The value programmed for bits[7:3] is used by the
processor to define the base address in the interrupt vector table for the interrupt
routines associated with each IRQ on the controller. Typical ISA ICW2 values are 08h
for the master controller and 70h for the slave controller.
13.4.4 ICW3—Master Controller Initialization Command
Word 3 Register
Offset Address: 21h Attribute: WO
Default Value: All bits undefined Size: 8 bits
Bit Description
7:3
Interrupt Vector Base Address—WO. Bits [7:3] define the base address in the
interrupt vector table for the interrupt routines associated with each interrupt request
level input.
2:0
Interrupt Request Level—WO. When writing ICW2, these bits should all be 0. During
an interrupt acknowledge cycle, these bits are programmed by the interrupt controller
with the interrupt to be serviced. This is combined with bits [7:3] to form the interrupt
vector driven onto the data bus during the second INTA# cycle. The code is a three bit
binary code:
000b IRQ0 IRQ8
001b IRQ1 IRQ9
010b IRQ2 IRQ10
011b IRQ3 IRQ11
100b IRQ4 IRQ12
101b IRQ5 IRQ13
110b IRQ6 IRQ14
111b IRQ7 IRQ15
Bit Description
7:3 0 = These bits must be programmed to 0.
2
Cascaded Interrupt Controller IRQ Connection—WO. This bit indicates that the
slave controller is cascaded on IRQ2. When IRQ8#–IRQ15 is asserted, it goes through
the slave controller’s priority resolver. The slave controller’s INTR output onto IRQ2.
IRQ2 then goes through the master controller’s priority solver. If it wins, the INTR
signal is asserted to the processor, and the returning interrupt acknowledge returns the
interrupt vector for the slave controller.
1 = This bit must always be programmed to a 1.
1:0 0 = These bits must be programmed to 0.
LPC Interface Bridge Registers (D31:F0)
506 Datasheet
13.4.5 ICW3—Slave Controller Initialization Command
Word 3 Register
Offset Address: A1h Attribute: WO
Default Value: All bits undefined Size: 8 bits
13.4.6 ICW4—Initialization Command Word 4 Register
Offset Address: Master Controller 021h Attribute: WO
Slave Controller 0A1h Size: 8 bits
Default Value: 01h
Bit Description
7:3 0 = These bits must be programmed to 0.
2:0
Slave Identification CodeWO. These bits are compared against the slave
identification code broadcast by the master controller from the trailing edge of the first
internal INTA# pulse to the trailing edge of the second internal INTA# pulse. These bits
must be programmed to 02h to match the code broadcast by the master controller.
When 02h is broadcast by the master controller during the INTA# sequence, the slave
controller assumes responsibility for broadcasting the interrupt vector.
Bit Description
7:5 0 = These bits must be programmed to 0.
4
Special Fully Nested Mode (SFNM)—WO.
0 = Should normally be disabled by writing a 0 to this bit.
1 = Special fully nested mode is programmed.
3Buffered Mode (BUF)—WO.
0 = Must be programmed to 0 for the PCH. This is non-buffered mode.
2Master/Slave in Buffered Mode—WO. Not used.
0 = Should always be programmed to 0.
1
Automatic End of Interrupt (AEOI)—WO.
0 = This bit should normally be programmed to 0. This is the normal end of interrupt.
1 = Automatic End of Interrupt (AEOI) mode is programmed.
0
Microprocessor Mode—WO.
1 = Must be programmed to 1 to indicate that the controller is operating in an Intel
Architecture-based system.
Datasheet 507
LPC Interface Bridge Registers (D31:F0)
13.4.7 OCW1—Operational Control Word 1 (Interrupt Mask)
Register
Offset Address: Master Controller 021h Attribute: R/W
Slave Controller 0A1h Size: 8 bits
Default Value: 00h
13.4.8 OCW2—Operational Control Word 2 Register
Offset Address: Master Controller 020h Attribute: WO
Slave Controller 0A0h Size: 8 bits
Default Value: Bit[4:0]=undefined, Bit[7:5]=001
Following a part reset or ICW initialization, the controller enters the fully nested mode
of operation. Non-specific EOI without rotation is the default. Both rotation mode and
specific EOI mode are disabled following initialization.
Bit Description
7:0
Interrupt Request Mask—R/W. When a 1 is written to any bit in this register, the
corresponding IRQ line is masked. When a 0 is written to any bit in this register, the
corresponding IRQ mask bit is cleared, and interrupt requests will again be accepted by
the controller. Masking IRQ2 on the master controller will also mask the interrupt
requests from the slave controller.
Bit Description
7:5
Rotate and EOI Codes (R, SL, EOI)—WO. These three bits control the Rotate and End
of Interrupt modes and combinations of the two.
000 = Rotate in Auto EOI Mode (Clear)
001 = Non-specific EOI command
010 = No Operation
011 = *Specific EOI Command
100 = Rotate in Auto EOI Mode (Set)
101 = Rotate on Non-Specific EOI Command
110 = *Set Priority Command
111 = *Rotate on Specific EOI Command
*L0 – L2 Are Used
4:3 OCW2 Select—WO. When selecting OCW2, bits 4:3 = 00
2:0
Interrupt Level Select (L2, L1, L0)—WO. L2, L1, and L0 determine the interrupt level
acted upon when the SL bit is active. A simple binary code, outlined below, selects the
channel for the command to act upon. When the SL bit is inactive, these bits do not
have a defined function; programming L2, L1 and L0 to 0 is sufficient in this case.
000b IRQ0/8 000b IRQ4/12
001b IRQ1/9 001b IRQ5/13
010b IRQ2/10 010b IRQ6/14
011b IRQ3/11 011b IRQ7/15
LPC Interface Bridge Registers (D31:F0)
508 Datasheet
13.4.9 OCW3—Operational Control Word 3 Register
Offset Address: Master Controller 020h Attribute:WO
Slave Controller 0A0h Size: 8 bits
Default Value: Bit[6,0]=0, Bit[7,4:2]=undefined,
Bit[5,1]=1
Bit Description
7 Reserved. Must be 0.
6
Special Mask Mode (SMM)—WO.
1 = The Special Mask Mode can be used by an interrupt service routine to dynamically
alter the system priority structure while the routine is executing, through selective
enabling/disabling of the other channel's mask bits. Bit 5, the ESMM bit, must be
set for this bit to have any meaning.
5
Enable Special Mask Mode (ESMM)—WO.
0 = Disable. The SMM bit becomes a “don't care”.
1 = Enable the SMM bit to set or reset the Special Mask Mode.
4:3 OCW3 Select—WO. When selecting OCW3, bits 4:3 = 01
2
Poll Mode Command—WO.
0 = Disable. Poll Command is not issued.
1 = Enable. The next I/O read to the interrupt controller is treated as an interrupt
acknowledge cycle. An encoded byte is driven onto the data bus, representing the
highest priority level requesting service.
1:0
Register Read Command—WO. These bits provide control for reading the In-Service
Register (ISR) and the Interrupt Request Register (IRR). When bit 1=0, bit 0 will not
affect the register read selection. When bit 1=1, bit 0 selects the register status
returned following an OCW3 read. If bit 0=0, the IRR will be read. If bit 0=1, the ISR
will be read. Following ICW initialization, the default OCW3 port address read will be
“read IRR. To retain the current selection (read ISR or read IRR), always write a 0 to
bit 1 when programming this register. The selected register can be read repeatedly
without reprogramming OCW3. To select a new status register, OCW3 must be
reprogrammed prior to attempting the read.
00 = No Action
01 = No Action
10 = Read IRQ Register
11 = Read IS Register
Datasheet 509
LPC Interface Bridge Registers (D31:F0)
13.4.10 ELCR1—Master Controller Edge/Level Triggered Register
Offset Address: 4D0h Attribute: R/W
Default Value: 00h Size: 8 bits
In edge mode, (bit[x] = 0), the interrupt is recognized by a low to high transition. In
level mode (bit[x] = 1), the interrupt is recognized by a high level. The cascade
channel, IRQ2, the heart beat timer (IRQ0), and the keyboard controller (IRQ1),
cannot be put into level mode.
Bit Description
7
IRQ7 ECL—R/W.
0 = Edge.
1 = Level.
6
IRQ6 ECL—R/W.
0 = Edge.
1 = Level.
5
IRQ5 ECL—R/W.
0 = Edge.
1 = Level.
4
IRQ4 ECL—R/W.
0 = Edge.
1 = Level.
3
IRQ3 ECL—R/W.
0 = Edge.
1 = Level.
2:0 Reserved. Must be 0.
LPC Interface Bridge Registers (D31:F0)
510 Datasheet
13.4.11 ELCR2—Slave Controller Edge/Level Triggered Register
Offset Address: 4D1h Attribute: R/W
Default Value: 00h Size: 8 bits
In edge mode, (bit[x] = 0), the interrupt is recognized by a low to high transition. In
level mode (bit[x] = 1), the interrupt is recognized by a high level. The real time clock,
IRQ8#, and the floating point error interrupt, IRQ13, cannot be programmed for level
mode.
Bit Description
7
IRQ15 ECL—R/W.
0 = Edge
1 = Level
6
IRQ14 ECL—R/W.
0 = Edge
1 = Level
5 Reserved. Must be 0.
4
IRQ12 ECL—R/W.
0 = Edge
1 = Level
3
IRQ11 ECL—R/W.
0 = Edge
1 = Level
2
IRQ10 ECL—R/W.
0 = Edge
1 = Level
1
IRQ9 ECL—R/W.
0 = Edge
1 = Level
0 Reserved. Must be 0.
Datasheet 511
LPC Interface Bridge Registers (D31:F0)
13.5 Advanced Programmable Interrupt Controller
(APIC)
13.5.1 APIC Register Map
The APIC is accessed using an indirect addressing scheme. Two registers are visible by
software for manipulation of most of the APIC registers. These registers are mapped
into memory space. The address bits 19:12 of the address range are programmable
through bits 7:0 of OIC register (Chipset Config Registers:Offset 31FEh) The registers
are shown in Table 13-4.
Table 13-5 lists the registers which can be accessed within the APIC using the Index
Register. When accessing these registers, accesses must be done one DWord at a time.
For example, software should never access byte 2 from the Data register before
accessing bytes 0 and 1. The hardware will not attempt to recover from a bad
programming model in this case.
13.5.2 IND—Index Register
Memory Address FEC_ _0000h Attribute: R/W
Default Value: 00h Size: 8 bits
The Index Register will select which APIC indirect register to be manipulated by
software. The selector values for the indirect registers are listed in Table 13-5. Software
will program this register to select the desired APIC internal register
.
Table 13-4. APIC Direct Registers
Address Mnemonic Register Name Size Type
FEC_ _0000h IND Index 8 bits R/W
FEC_ _0010h DAT Data 32 bits R/W
FEC_ _0040h EOIR EOI 32 bits WO
Table 13-5. APIC Indirect Registers
Index Mnemonic Register Name Size Type
00 ID Identification 32 bits R/W
01 VER Version 32 bits RO
02–0F Reserved RO
10–11 REDIR_TBL0 Redirection Table 0 64 bits R/W, RO
12–13 REDIR_TBL1 Redirection Table 1 64 bits R/W, RO
... ... ... ... ...
3E–3F REDIR_TBL23 Redirection Table 23 64 bits R/W, RO
40–FF Reserved RO
Bit Description
7:0 APIC Index—R/W. This is an 8-bit pointer into the I/O APIC register table.
LPC Interface Bridge Registers (D31:F0)
512 Datasheet
13.5.3 DAT—Data Register
Memory Address FEC_ _0000h Attribute: R/W
Default Value: 00000000h Size: 32 bits
This is a 32-bit register specifying the data to be read or written to the register pointed
to by the Index register. This register can only be accessed in DWord quantities.
13.5.4 EOIR—EOI Register
Memory Address FEC_ _0000h Attribute: R/W
Default Value: N/A Size: 32 bits
The EOI register is present to provide a mechanism to maintain the level triggered
semantics for level-triggered interrupts issued on the parallel bus.
When a write is issued to this register, the I/O APIC will check the lower 8 bits written
to this register, and compare it with the vector field for each entry in the I/O
Redirection Table. When a match is found, the Remote_IRR bit (Index Offset 10h, bit
14) for that I/O Redirection Entry will be cleared.
Note: If multiple I/O Redirection entries, for any reason, assign the same vector for more
than one interrupt input, each of those entries will have the Remote_IRR bit reset to 0.
The interrupt, which was prematurely reset, will not be lost because if its input
remained active when the Remote_IRR bit was cleared, the interrupt will be reissued
and serviced at a later time. Note that only bits 7:0 are actually used. Bits 31:8 are
ignored by the PCH.
Note: To provide for future expansion, the processor should always write a value of 0 to Bits
31:8.
Bit Description
7:0
APIC Data—R/W. This is a 32-bit register for the data to be read or written to the APIC
indirect register (Figure 13-5) pointed to by the Index register (Memory Address
FEC0_0000h).
Bit Description
31:8 Reserved. To provide for future expansion, the processor should always write a value of
0 to Bits 31:8.
7:0
Redirection Entry Clear—WO. When a write is issued to this register, the I/O APIC will
check this field, and compare it with the vector field for each entry in the I/O
Redirection Table. When a match is found, the Remote_IRR bit for that I/O Redirection
Entry will be cleared.
Datasheet 513
LPC Interface Bridge Registers (D31:F0)
13.5.5 ID—Identification Register
Index Offset: 00h Attribute: R/W
Default Value: 00000000h Size: 32 bits
The APIC ID serves as a physical name of the APIC. The APIC bus arbitration ID for the
APIC is derived from its I/O APIC ID. This register is reset to 0 on power-up reset.
13.5.6 VER—Version Register
Index Offset: 01h Attribute: RO, RWO
Default Value: 00170020h Size: 32 bits
Each I/O APIC contains a hardwired Version Register that identifies different
implementation of APIC and their versions. The maximum redirection entry information
also is in this register, to let software know how many interrupt are supported by this
APIC.
Bit Description
31:28 Reserved
27:24 APIC ID—R/W. Software must program this value before using the APIC.
23:16 Reserved
15 Scratchpad Bit.
14:0 Reserved
Bit Description
31:24 Reserved
23:16
Maximum Redirection Entries (MRE)—RWO. This is the entry number (0 being the
lowest entry) of the highest entry in the redirection table. It is equal to the number of
interrupt input pins minus one and is in the range 0 through 239. In the PCH this field
is hardwired to 17h to indicate 24 interrupts.
BIOS must write to this field after PLTRST# to lockdown the value. this allows BIOS to
use some of the entries for its own purpose and thus advertising fewer IOxAPIC
Redirection Entries to the OS.
15 Pin Assertion Register Supported (PRQ)—RO. Indicate that the IOxAPIC does not
implement the Pin Assertion Register.
14:8 Reserved
7:0 Version (VS)—RO. This is a version number that identifies the implementation
version.
LPC Interface Bridge Registers (D31:F0)
514 Datasheet
13.5.7 REDIR_TBL—Redirection Table
Index Offset: 10h11h (vector 0) through Attribute:R/W, RO
3E3Fh (vector 23)
Default Value: Bit 16 = 1. All other bits undefined Size: 64 bits each, (accessed
as two 32 bit quantities)
The Redirection Table has a dedicated entry for each interrupt input pin. The
information in the Redirection Table is used to translate the interrupt manifestation on
the corresponding interrupt pin into an APIC message.
The APIC will respond to an edge triggered interrupt as long as the interrupt is held
until after the acknowledge cycle has begun. Once the interrupt is detected, a delivery
status bit internally to the I/O APIC is set. The state machine will step ahead and wait
for an acknowledgment from the APIC unit that the interrupt message was sent. Only
then will the I/O APIC be able to recognize a new edge on that interrupt pin. That new
edge will only result in a new invocation of the handler if its acceptance by the
destination APIC causes the Interrupt Request Register bit to go from 0 to 1.
(In other words, if the interrupt was not already pending at the destination.)
Bit Description
63:56
Destination—R/W. If bit 11 of this entry is 0 (Physical), then bits 59:56 specifies an
APIC ID. In this case, bits 63:59 should be programmed by software to 0.
If bit 11 of this entry is 1 (Logical), then bits 63:56 specify the logical destination
address of a set of processors.
55:48 Extended Destination ID (EDID)—RO. These bits are sent to a local APIC only when
in Processor System Bus mode. They become bits 11:4 of the address.
47:17 Reserved
16
Mask—R/W.
0 = Not masked: An edge or level on this interrupt pin results in the delivery of the
interrupt to the destination.
1 = Masked: Interrupts are not delivered nor held pending. Setting this bit after the
interrupt is accepted by a local APIC has no effect on that interrupt. This behavior
is identical to the device withdrawing the interrupt before it is posted to the
processor. It is software's responsibility to deal with the case where the mask bit is
set after the interrupt message has been accepted by a local APIC unit but before
the interrupt is dispensed to the processor.
15
Trigger Mode—R/W. This field indicates the type of signal on the interrupt pin that
triggers an interrupt.
0 = Edge triggered.
1 = Level triggered.
14
Remote IRR—R/W. This bit is used for level triggered interrupts; its meaning is
undefined for edge triggered interrupts.
0 = Reset when an EOI message is received from a local APIC.
1 = Set when Local APIC/s accept the level interrupt sent by the I/O APIC.
13
Interrupt Input Pin Polarity—R/W. This bit specifies the polarity of each interrupt
signal connected to the interrupt pins.
0 = Active high.
1 = Active low.
12
Delivery Status—RO. This field contains the current status of the delivery of this
interrupt. Writes to this bit have no effect.
0 = Idle. No activity for this interrupt.
1 = Pending. Interrupt has been injected, but delivery is not complete.
Datasheet 515
LPC Interface Bridge Registers (D31:F0)
NOTE: Delivery Mode encoding:
000 = Fixed. Deliver the signal on the INTR signal of all processor cores listed in the destination.
Trigger Mode can be edge or level.
001 = Lowest Priority. Deliver the signal on the INTR signal of the processor core that is
executing at the lowest priority among all the processors listed in the specified
destination. Trigger Mode can be edge or level.
010 = SMI (System Management Interrupt). Requires the interrupt to be programmed as edge
triggered. The vector information is ignored but must be programmed to all 0s for future
compatibility: not supported
011 = Reserved
100 = NMI. Deliver the signal on the NMI signal of all processor cores listed in the destination.
Vector information is ignored. NMI is treated as an edge triggered interrupt even if it is
programmed as level triggered. For proper operation this redirection table entry must be
programmed to edge triggered. The NMI delivery mode does not set the RIRR bit. If the
redirection table is incorrectly set to level, the loop count will continue counting through
the redirection table addresses. Once the count for the NMI pin is reached again, the
interrupt will be sent again: not supported
101 = INIT. Deliver the signal to all processor cores listed in the destination by asserting the
INIT signal. All addressed local APICs will assume their INIT state. INIT is always treated
as an edge triggered interrupt even if programmed as level triggered. For proper
operation this redirection table entry must be programmed to edge triggered. The INIT
delivery mode does not set the RIRR bit. If the redirection table is incorrectly set to level,
the loop count will continue counting through the redirection table addresses. Once the
count for the INIT pin is reached again, the interrupt will be sent again: not supported
110 = Reserved
111 = ExtINT. Deliver the signal to the INTR signal of all processor cores listed in the destination
as an interrupt that originated in an externally connected 8259A compatible interrupt
controller. The INTA cycle that corresponds to this ExtINT delivery will be routed to the
external controller that is expected to supply the vector. Requires the interrupt to be
programmed as edge triggered.
11
Destination Mode—R/W. This field determines the interpretation of the Destination
field.
0 = Physical. Destination APIC ID is identified by bits 59:56.
1 = Logical. Destinations are identified by matching bit 63:56 with the Logical
Destination in the Destination Format Register and Logical Destination Register in
each Local APIC.
10:8
Delivery Mode—R/W. This field specifies how the APICs listed in the destination field
should act upon reception of this signal. Certain Delivery Modes will only operate as
intended when used in conjunction with a specific trigger mode. These encodings are
listed in the note below:
7:0 Vector—R/W. This field contains the interrupt vector for this interrupt. Values range
between 10h and FEh.
Bit Description
LPC Interface Bridge Registers (D31:F0)
516 Datasheet
13.6 Real Time Clock Registers
13.6.1 I/O Register Address Map
The RTC internal registers and RAM are organized as two banks of 128 bytes each,
called the standard and extended banks. The first 14 bytes of the standard bank
contain the RTC time and date information along with four registers, A–D, that are used
for configuration of the RTC. The extended bank contains a full 128 bytes of battery
backed SRAM, and will be accessible even when the RTC module is disabled (using the
RTC configuration register). Registers A–D do not physically exist in the RAM.
All data movement between the host processor and the real-time clock is done through
registers mapped to the standard I/O space. The register map appears in Table 13-6.
NOTES:
1. I/O locations 70h and 71h are the standard legacy location for the real-time clock.
The map for this bank is shown in Tab l e 13-7. Locations 72h and 73h are for
accessing the extended RAM. The extended RAM bank is also accessed using an
indexed scheme. I/O address 72h is used as the address pointer and I/O address
73h is used as the data register. Index addresses above 127h are not valid. If the
extended RAM is not needed, it may be disabled.
2. Software must preserve the value of bit 7 at I/O addresses 70h and 74h. When
writing to this address, software must first read the value, and then write the same
value for bit 7 during the sequential address write. Note that port 70h is not
directly readable. The only way to read this register is through Alt Access mode.
Although RTC Index bits 6:0 are readable from port 74h, bit 7 will always return 0.
If the NMI# enable is not changed during normal operation, software can
alternatively read this bit once and then retain the value for all subsequent writes
to port 70h.
Table 13-6. RTC I/O Registers
I/O
Locations If U128E bit = 0 Function
70h and 74h Also alias to 72h and 76h Real-Time Clock (Standard RAM) Index Register
71h and 75h Also alias to 73h and 77h Real-Time Clock (Standard RAM) Target Register
72h and 76h Extended RAM Index Register (if enabled)
73h and 77h Extended RAM Target Register (if enabled)
Datasheet 517
LPC Interface Bridge Registers (D31:F0)
13.6.2 Indexed Registers
The RTC contains two sets of indexed registers that are accessed using the two
separate Index and Target registers (70/71h or 72/73h), as shown in Table 13-7.
Table 13-7. RTC (Standard) RAM Bank
Index Name
00h Seconds
01h Seconds Alarm
02h Minutes
03h Minutes Alarm
04h Hours
05h Hours Alarm
06h Day of Week
07h Day of Month
08h Month
09h Year
0Ah Register A
0Bh Register B
0Ch Register C
0Dh Register D
0Eh–7Fh 114 Bytes of User RAM
LPC Interface Bridge Registers (D31:F0)
518 Datasheet
13.6.2.1 RTC_REGA—Register A
RTC Index: 0A Attribute: R/W
Default Value: Undefined Size: 8-bit
Lockable: No Power Well: RTC
This register is used for general configuration of the RTC functions. None of the bits are
affected by RSMRST# or any other PCH reset signal.
Bit Description
7
Update In Progress (UIP)—R/W. This bit may be monitored as a status flag.
0 = The update cycle will not start for at least 488 µs. The time, calendar, and alarm
information in RAM is always available when the UIP bit is 0.
1 = The update is soon to occur or is in progress.
6:4
Division Chain Select (DV[2:0])—R/W. These three bits control the divider chain for
the oscillator, and are not affected by RSMRST# or any other reset signal.
010 = Normal Operation
11X = Divider Reset
101 = Bypass 15 stages (test mode only)
100 = Bypass 10 stages (test mode only)
011 = Bypass 5 stages (test mode only)
001 = Invalid
000 = Invalid
3:0
Rate Select (RS[3:0])—R/W. Selects one of 13 taps of the 15 stage divider chain. The
selected tap can generate a periodic interrupt if the PIE bit is set in Register B.
Otherwise this tap will set the PF flag of Register C. If the periodic interrupt is not to be
used, these bits should all be set to 0. RS3 corresponds to bit 3.
0000 = Interrupt never toggles
0001 = 3.90625 ms
0010 = 7.8125 ms
0011 = 122.070 µs
0100 = 244.141 µs
0101 = 488.281 µs
0110 = 976.5625 µs
0111 = 1.953125 ms
1000 = 3.90625 ms
1001 = 7.8125 ms
1010 = 15.625 ms
1011 = 31.25 ms
1100 = 62.5 ms
1101 = 125 ms
1110 = 250 ms
1111= 500 ms
Datasheet 519
LPC Interface Bridge Registers (D31:F0)
13.6.2.2 RTC_REGB—Register B (General Configuration)
RTC Index: 0Bh Attribute: R/W
Default Value: U0U00UUU (U: Undefined) Size: 8-bit
Lockable: No Power Well: RTC
Bit Description
7
Update Cycle Inhibit (SET)—R/W. Enables/Inhibits the update cycles. This bit is not
affected by RSMRST# nor any other reset signal.
0 = Update cycle occurs normally once each second.
1 = A current update cycle will abort and subsequent update cycles will not occur until
SET is returned to 0. When set is one, the BIOS may initialize time and calendar
bytes safely.
NOTE: This bit should be set then cleared early in BIOS POST after each powerup
directly after coin-cell battery insertion.
6
Periodic Interrupt Enable (PIE)—R/W. This bit is cleared by RSMRST#, but not on
any other reset.
0 = Disable.
1 = Enable. Allows an interrupt to occur with a time base set with the RS bits of register
A.
5
Alarm Interrupt Enable (AIE)—R/W. This bit is cleared by RTCRST#, but not on any
other reset.
0 = Disable.
1 = Enable. Allows an interrupt to occur when the AF is set by an alarm match from the
update cycle. An alarm can occur once a second, one an hour, once a day, or one a
month.
4
Update-Ended Interrupt Enable (UIE)—R/W. This bit is cleared by RSMRST#, but
not on any other reset.
0 = Disable.
1 = Enable. Allows an interrupt to occur when the update cycle ends.
3
Square Wave Enable (SQWE)—R/W. This bit serves no function in the PCH. It is left
in this register bank to provide compatibility with the Motorola 146818B. The PCH has
no SQW pin. This bit is cleared by RSMRST#, but not on any other reset.
2
Data Mode (DM)—R/W. This bit specifies either binary or BCD data representation.
This bit is not affected by RSMRST# nor any other reset signal.
0 = BCD
1 = Binary
1
Hour Format (HOURFORM)—R/W. This bit indicates the hour byte format. This bit is
not affected by RSMRST# nor any other reset signal.
0 = Twelve-hour mode. In twelve-hour mode, the seventh bit represents AM as 0 and
PM as one.
1 = Twenty-four hour mode.
0
Daylight Savings Legacy Software Support (DSLSWS)—R/W. Daylight savings
functionality is no longer supported. This bit is used to maintain legacy software
support and has no associated functionality. If BUC.DSO bit is set, the DSLSWS bit
continues to be R/W.
LPC Interface Bridge Registers (D31:F0)
520 Datasheet
13.6.2.3 RTC_REGC—Register C (Flag Register)
RTC Index: 0Ch Attribute: RO
Default Value: 00U00000 (U: Undefined) Size: 8-bit
Lockable: No Power Well: RTC
Writes to Register C have no effect.
13.6.2.4 RTC_REGD—Register D (Flag Register)
RTC Index: 0Dh Attribute: R/W
Default Value: 10UUUUUU (U: Undefined) Size: 8-bit
Lockable: No Power Well: RTC
Bit Description
7
Interrupt Request Flag (IRQF)—RO. IRQF = (PF * PIE) + (AF * AIE) + (UF *UFE).
This bit also causes the RTC Interrupt to be asserted. This bit is cleared upon RSMRST#
or a read of Register C.
6
Periodic Interrupt Flag (PF)—RO. This bit is cleared upon RSMRST# or a read of
Register C.
0 = If no taps are specified using the RS bits in Register A, this flag will not be set.
1 = Periodic interrupt Flag will be 1 when the tap specified by the RS bits of register A is
1.
5
Alarm Flag (AF)—RO.
0 = This bit is cleared upon RTCRST# or a read of Register C.
1 = Alarm Flag will be set after all Alarm values match the current time.
4
Update-Ended Flag (UF)—RO.
0 = The bit is cleared upon RSMRST# or a read of Register C.
1 = Set immediately following an update cycle for each second.
3:0 Reserved. Will always report 0.
Bit Description
7
Valid RAM and Time Bit (VRT)—R/W.
0 = This bit should always be written as a 0 for write cycle, however it will return a 1 for
read cycles.
1 = This bit is hardwired to 1 in the RTC power well.
6 Reserved. This bit always returns a 0 and should be set to 0 for write cycles.
5:0
Date Alarm—R/W. These bits store the date of month alarm value. If set to 000000b,
then a don’t care state is assumed. The host must configure the date alarm for these
bits to do anything, yet they can be written at any time. If the date alarm is not
enabled, these bits will return 0s to mimic the functionality of the Motorola 146818B.
These bits are not affected by any reset assertion.
Datasheet 521
LPC Interface Bridge Registers (D31:F0)
13.7 Processor Interface Registers
Table 13-8 is the register address map for the processor interface registers.
13.7.1 NMI_SC—NMI Status and Control Register
I/O Address: 61h Attribute: R/W, RO
Default Value: 00h Size: 8-bit
Lockable: No Power Well: Core
Table 13-8. Processor Interface PCI Register Address Map
Offset Mnemonic Register Name Default Type
61h NMI_SC NMI Status and Control 00h R/W, RO
70h NMI_EN NMI Enable 80h R/W (special)
92h PORT92 Fast A20 and Init 00h R/W
F0h COPROC_ERR Coprocessor Error 00h WO
CF9h RST_CNT Reset Control 00h R/W
Bit Description
7
SERR# NMI Source Status (SERR#_NMI_STS)—RO.
1 = Bit is set if a PCI agent detected a system error and pulses the PCI SERR# line and
if bit 2 (PCI_SERR_EN) is cleared. This interrupt source is enabled by setting bit 2
to 0. To reset the interrupt, set bit 2 to 1 and then set it to 0. When writing to port
61h, this bit must be 0.
NOTE: This bit is set by any of the PCH internal sources of SERR; this includes SERR
assertions forwarded from the secondary PCI bus, errors on a PCI Express*
port, or other internal functions that generate SERR#.
6
IOCHK# NMI Source Status (IOCHK_NMI_STS)—RO.
1 = Bit is set if an LPC agent (using SERIRQ) asserted IOCHK# and if bit 3
(IOCHK_NMI_EN) is cleared. This interrupt source is enabled by setting bit 3 to 0.
To reset the interrupt, set bit 3 to 1 and then set it to 0. When writing to port 61h,
this bit must be a 0.
5
Timer Counter 2 OUT Status (TMR2_OUT_STS)—RO. This bit reflects the current
state of the 8254 counter 2 output. Counter 2 must be programmed following any PCI
reset for this bit to have a determinate value. When writing to port 61h, this bit must
be a 0.
4
Refresh Cycle Toggle (REF_TOGGLE)—RO. This signal toggles from either 0 to 1 or
1 to 0 at a rate that is equivalent to when refresh cycles would occur. When writing to
port 61h, this bit must be a 0.
3
IOCHK# NMI Enable (IOCHK_NMI_EN)—R/W.
0 = Enabled.
1 = Disabled and cleared.
2
PCI SERR# Enable (PCI_SERR_EN)—R/W.
0 = SERR# NMIs are enabled.
1 = SERR# NMIs are disabled and cleared.
1
Speaker Data Enable (SPKR_DAT_EN)—R/W.
0 = SPKR output is a 0.
1 = SPKR output is equivalent to the Counter 2 OUT signal value.
0
Timer Counter 2 Enable (TIM_CNT2_EN)—R/W.
0 = Disable
1 = Enable
LPC Interface Bridge Registers (D31:F0)
522 Datasheet
13.7.2 NMI_EN—NMI Enable (and Real Time Clock Index)
Register
I/O Address: 70h Attribute: R/W (special)
Default Value: 80h Size: 8-bit
Lockable: No Power Well: Core
Note: The RTC Index field is write-only for normal operation. This field can only be read in Alt-
Access Mode. Note, however, that this register is aliased to Port 74h (documented in
Table 13-6), and all bits are readable at that address.
13.7.3 PORT92—Fast A20 and Init Register
I/O Address: 92h Attribute: R/W
Default Value: 00h Size: 8-bit
Lockable: No Power Well: Core
13.7.4 COPROC_ERR—Coprocessor Error Register
I/O Address: F0h Attribute: WO
Default Value: 00h Size: 8-bits
Lockable: No Power Well: Core
Bits Description
7
NMI Enable (NMI_EN)—R/W (special).
0 = Enable NMI sources.
1 = Disable All NMI sources.
6:0 Real Time Clock Index Address (RTC_INDX)—R/W (special). This data goes to the
RTC to select which register or CMOS RAM address is being accessed.
Bit Description
7:2 Reserved
1
Alternate A20 Gate (ALT_A20_GATE)—R/W. This bit is Or’d with the A20GATE input
signal to generate A20M# to the processor.
0 = A20M# signal can potentially go active.
1 = This bit is set when INIT# goes active.
0INIT_NOW—R/W. When this bit transitions from a 0 to a 1, the PCH will force INIT#
active for 16 PCI clocks.
Bits Description
7:0
Coprocessor Error (COPROC_ERR)—WO. Any value written to this register will
cause IGNNE# to go active, if FERR# had generated an internal IRQ13. For FERR# to
generate an internal IRQ13, the CEN bit must be 1.
Datasheet 523
LPC Interface Bridge Registers (D31:F0)
13.7.5 RST_CNT—Reset Control Register
I/O Address: CF9h Attribute: R/W
Default Value: 00h Size: 8-bit
Lockable: No Power Well: Core
Bit Description
7:4 Reserved
3
Full Reset (FULL_RST)—R/W. This bit is used to determine the states of SLP_S3#,
SLP_S4#, and SLP_S5# after a CF9 hard reset (SYS_RST =1 and RST_CPU is set to 1),
after PWROK going low (with RSMRST# high), or after two TCO timeouts.
0 = PCH will keep SLP_S3#, SLP_S4# and SLP_S5# high.
1 = PCH will drive SLP_S3#, SLP_S4# and SLP_S5# low for 3–5 seconds.
NOTE: When this bit is set, it also causes the full power cycle (SLP_S3/4/5# assertion)
in response to SYS_RESET#, PWROK#, and Watchdog timer reset sources.
2Reset CPU (RST_CPU)—R/W. When this bit transitions from a 0 to a 1, it initiates a
hard or soft reset, as determined by the SYS_RST bit (bit 1 of this register).
1
System Reset (SYS_RST)—R/W. This bit is used to determine a hard or soft reset to
the processor.
0 = When RST_CPU bit goes from 0 to 1, the PCH performs a soft reset by activating
INIT# for 16 PCI clocks.
1 = When RST_CPU bit goes from 0 to 1, the PCH performs a hard reset by activating
PLTRST# and SUS_STAT# active for a minimum of about 1 milliseconds. In this
case, SLP_S3#, SLP_S4# and SLP_S5# state (assertion or de-assertion) depends
on FULL_RST bit setting. The PCH main power well is reset when this bit is 1. It
also resets the resume well bits (except for those noted throughout the EDS).
0 Reserved
LPC Interface Bridge Registers (D31:F0)
524 Datasheet
13.8 Power Management Registers (PM—D31:F0)
The power management registers are distributed within the PCI Device 31: Function 0
space, as well as a separate I/O range. Each register is described below. Unless
otherwise indicate, bits are in the main (core) power well.
Bits not explicitly defined in each register are assumed to be reserved. When writing to
a reserved bit, the value should always be 0. Software should not attempt to use the
value read from a reserved bit, as it may not be consistently 1 or 0.
13.8.1 Power Management PCI Configuration Registers
(PM—D31:F0)
Table 13-9 shows a small part of the configuration space for PCI Device 31: Function 0.
It includes only those registers dedicated for power management. Some of the
registers are only used for Legacy Power management schemes.
13.8.1.1 GEN_PMCON_1—General PM Configuration 1 Register
(PM—D31:F0)
Offset Address: A0h Attribute: R/W, RO, R/WO
Default Value: 0000h Size: 16-bit
Lockable: No Usage: ACPI, Legacy
Power Well: Core
Table 13-9. Power Management PCI Register Address Map (PM—D31:F0)
Offset Mnemonic Register Name Default Type
A0h GEN_PMCON_1 General Power Management
Configuration 1 0000h R/W, R/WO,
RO
A2h GEN_PMCON_2 General Power Management
Configuration 2 00h R/W, R/WC,
RO
A4h GEN_PMCON_3 General Power Management
Configuration 3 00h R/W, R/WC
A6h GEN_PMCON_LO
CK
General Power Management
Configuration Lock 00h RO, R/WLO
A9h CIR4 Chipset Initialization Register 4 01h R/W
ABh BM_BREAK_EN BM_BREAK_EN 00h R/W
ACh PMIR Power Management Initialization 00000000h R/W, R/WL
B8–BBh GPI_ROUT GPI Route Control 00000000h R/W
Bit Description
15:11 Reserved
10
BIOS_PCI_EXP_EN—R/W. This bit acts as a global enable for the SCI associated
with the PCI Express* ports.
0 = The various PCI Express ports and Processor cannot cause the PCI_EXP_STS
bit to go active.
1 = The various PCI Express ports and Processor can cause the PCI_EXP_STS bit to
go active.
9
PWRBTN_LVL—RO. This bit indicates the current state of the PWRBTN# signal.
0 = Low.
1 = High.
Datasheet 525
LPC Interface Bridge Registers (D31:F0)
13.8.1.2 GEN_PMCON_2—General PM Configuration 2 Register
(PM—D31:F0)
Offset Address: A2h Attribute: R/W, RO, R/WC
Default Value: 00h Size: 8-bit
Lockable: No Usage: ACPI, Legacy
Power Well: Resume
8:5 Reserved
4
SMI_LOCK—R/WO. When this bit is set, writes to the GLB_SMI_EN bit (PMBASE +
30h, bit 0) will have no effect. Once the SMI_LOCK bit is set, writes of 0 to
SMI_LOCK bit will have no effect (that is, once set, this bit can only be cleared by
PLTRST#).
3 (Mobile
Only) Reserved
3 (Desktop
Only)
Pseudo CLKRUN_EN(PSEUDO_CLKRUN_EN)—R/W.
0 = Disable.
1 = Enable internal CLKRUN# logic to allow DMI PLL shutdown. This bit has no
impact on state of external CLKRUN# pin.
NOTES:
1. PSEUDO_CLKRUN_EN bit does not result in STP_PCI# assertion to actually
stop the external PCICLK.
2. This bit should be set mutually exclusive with the CLKRUN_EN bit. Setting
PSEUDO_CLKRUN_EN in a mobile sku could result in unspecified behavior.
2 (Mobile
Only)
PCI CLKRUN# Enable (CLKRUN_EN)—R/W.
0 = Disable. PCH drives the CLKRUN# signal low.
1 = Enable CLKRUN# logic to control the system PCI clock using the CLKRUN# and
STP_PCI# signals.
NOTES:
1. When the SLP_EN# bit is set, the PCH drives the CLKRUN# signal low
regardless of the state of the CLKRUN_EN bit. This ensures that the PCI and
LPC clocks continue running during a transition to a sleep state.
2. This bit should be set mutually exclusive with the PSEUDO_CLKRUN_EN bit.
Setting CLKRUN_EN in a non-mobile sku could result in unspecified
behavior.
2 (Desktop
Only) Reserved
1:0
Periodic SMI# Rate Select (PER_SMI_SEL)R/W. Set by software to control
the rate at which periodic SMI# is generated.
00 = 64 seconds
01 = 32 seconds
10 = 16 seconds
11 = 8 seconds
Bit Description
Bit Description
7
DRAM Initialization Bit—R/W. This bit does not effect hardware functionality in any
way. BIOS is expected to set this bit prior to starting the DRAM initialization sequence
and to clear this bit after completing the DRAM initialization sequence. BIOS can detect
that a DRAM initialization sequence was interrupted by a reset by reading this bit during
the boot sequence.
If the bit is 1, then the DRAM initialization was interrupted.
This bit is reset by the assertion of the RSMRST# pin.
LPC Interface Bridge Registers (D31:F0)
526 Datasheet
6 Reserved
5
Memory Placed in Self-Refresh (MEM_SR)—RO.
If the bit is 1, DRAM should have remained powered and held in Self-Refresh
through the last power state transition (that is, the last time the system left S0).
This bit is reset by the assertion of the RSMRST# pin.
4
System Reset Status (SRS)—R/WC. Software clears this bit by writing a 1 to it.
0 = SYS_RESET# button Not pressed.
1 = PCH sets this bit when the SYS_RESET# button is pressed. BIOS is expected to
read this bit and clear it, if it is set.
NOTES:
1. This bit is also reset by RSMRST# and CF9h resets.
2. The SYS_RESET# is implemented in the Main power well. This pin must be
properly isolated and masked to prevent incorrectly setting this Suspend well
status bit.
3
CPU Thermal Trip Status (CTS)—R/WC.
0 = Software clears this bit by writing a 1 to it.
1 = This bit is set when PLTRST# is inactive and THRMTRIP# goes active while the
system is in an S0 or S1 state.
NOTES:
1. This bit is also reset by RSMRST#, and CF9h resets. It is not reset by the
shutdown and reboot associated with the CPUTHRMTRIP# event.
2. The CF9h reset in the description refers to CF9h type core well reset which
includes SYS_RST#, PWROK/SYS_PWROK low, SMBus hard reset, TCO Timeout.
This type of reset will clear CTS bit.
2
Minimum SLP_S4# Assertion Width Violation Status—R/WC.
0 = Software clears this bit by writing a 1 to it.
1 = Hardware sets this bit when the SLP_S4# assertion width is less than the time
programmed in the SLP_S4# Minimum Assertion Width field (D31:F0:Offset
A4h:bits 5:4). The PCH begins the timer when SLP_S4# is asserted during S4/S5
entry, or when the RSMRST# input is de-asserted during G3 exit. Note that this bit
is functional regardless of the value in the SLP_S4# Assertion Stretch Enable
(D31:F0:Offset A4h:bit 3).
NOTE: This bit is reset by the assertion of the RSMRST# pin, but can be set in some
cases before the default value is readable.
1 Reserved
0
PWROK Failure (PWROK_FLR)—R/WC.
0 = Software clears this bit by writing a 1 to it, or when the system goes into a G3
state.
1 = This bit will be set any time PWROK goes low, when the system was in S0, or S1
state.
NOTE: See Chapter 5.13.10.3 for more details about the PWROK pin functionality.
Bit Description
Datasheet 527
LPC Interface Bridge Registers (D31:F0)
13.8.1.3 GEN_PMCON_3—General PM Configuration 3 Register
(PM—D31:F0)
Offset Address: A4h Attribute: R/W, R/WC
Default Value: 00h Size: 16-bit
Lockable: No Usage: ACPI, Legacy
Power Well: RTC, SUS
Bit Description
15
PME B0 S5 Disable (PME_B0_S5_DIS)—R/W. When set to 1, this bit blocks
wake events from PME_B0_STS in S5, regardless of the state of PME_B0_EN.
When cleared (default), wake events from PME_B0_STS are allowed in S5 if
PME_B0_EN = 1.
Wakes from power states other than S5 are not affected by this policy bit.
The net effect of setting PME_B0_S5_DIS = '1' is described by the truth table
below:
Y = Wake; N = Don't wake; B0 = PME_B0_EN; OV = WOL Enable Override
This bit is cleared by the RTCRST# pin.
14 Reserved
13
WOL Enable Override—R/W.
0 = WOL policies are determined by PMEB0 enable bit and appropriate LAN status
bits
1 = Enable integrated LAN to wake the system in S5 only regardless of the value in
the PME_B0_EN bit in the GPE0_EN register.
This bit is cleared by the RTCRST# pin.
12
Disable SLP_S4# Stretching after G3: R/W
0 = Enables stretching on SLP_S4# in conjunction with SLP_S4# Assertion Stretch
Enable (bit 3) and the Minimum Assertion Width (bits 5:4)
1 = Disables stretching on SLP_S4# regardless of the state of the SLP_S4#
Assertion Stretch Enable (bit 3).
This bit is cleared by the RTCRST# pin.
NOTE: This field is RO when the SLP_Sx# Stretching Policy Lock- Down bit is set.
11:10
SLP_S3# Minimum Assertion Width: R/W This 2-bit value indicates the
minimum assertion width of the SLP_S3# signal to ensure that the Main power
supplies have been fully power-cycled.
Valid Settings are:
00 = 60–100 us
01 = 1–1.2 ms
10 = 50–50.2 ms
11 = 2–2.0002 s
This bit is cleared by the RSMRST# pin.
NOTE: This field is RO when the SLP_Sx# Stretching Policy Lock-Down bit is set.
B0/OV S1/S3/S4 S5
00 N N
01 N Y (LAN only)
11 Y (all PME B0 sources) Y (LAN only)
10 Y (all PME B0 sources) N
LPC Interface Bridge Registers (D31:F0)
528 Datasheet
9
General Reset Status (GEN_RST_STS)—R/WC. This bit is set by hardware
whenever PLTRST# asserts for any reason other than going into a software-
entered sleep state (using PM1CNT.SLP_EN write) or a suspend well power failure
(RSMRST# pin assertion). BIOS is expected to consult and then write a 1 to clear
this bit during the boot flow before determining what action to take based on
PM1_STS.WAK_STS = 1. If GEN_RST_STS = 1, the cold reset boot path should be
followed rather than the resume path, regardless of the setting of WAK_STS.
This bit is cleared by the RSMRST# pin.
8
SLP_LAN# Default Value (SLP_LAN_DEFAULT)—R/W. This bit specifies the
value to drive on the SLP_LAN# pin when in Sx/Moff and ME FW nor host BIOS has
configured SLP_LAN#/GPIO29 as an output. When this bit is set to 1 SLP_LAN#
will default to be driven high, when set to 0 SLP_LAN# will default to be driven low.
This bit will always determine SLP_LAN# behavior when in S4/S5/Moff after a G3,
in S5/Moff after a host partition reset with power down and when in S5/Moff due to
an unconditional power down.
This bit is cleared by RTCRST#.
7:6
SWSMI_RATE_SEL—R/W. This field indicates when the SWSMI timer will time
out.
Valid values are:
00 = 1.5 ms ± 0.6 ms
01 = 16 ms ± 4 ms
10 = 32 ms ± 4 ms
11 = 64 ms ± 4 ms
These bits are not cleared by any type of reset except RTCRST#.
5:4
SLP_S4# Minimum Assertion Width—R/W. This field indicates the minimum
assertion width of the SLP_S4# signal to ensure that the DRAMs have been safely
power-cycled.
Valid values are:
11 = 1 second
10 = 2 seconds
01 = 3 seconds
00 = 4 seconds
This value is used in two ways:
1. If the SLP_S4# assertion width is ever shorter than this time, a status bit is
set for BIOS to read when S0 is entered.
2. If enabled by bit 3 in this register, the hardware will prevent the SLP_S4#
signal from de-asserting within this minimum time period after asserting.
RTCRST# forces this field to the conservative default state (00b).
NOTE: This field is RO when the SLP_S4# Stretching Policy Lock-Down bit is set.
3
SLP_S4# Assertion Stretch Enable—R/W.
0 = The SLP_S4# minimum assertion time is 1 to 2 RTCCLK.
1 = The SLP_S4# signal minimally assert for the time specified in bits 5:4 of this
register.
This bit is cleared by RTCRST#.
NOTE: This bit is RO when the SLP_S4# Stretching Policy Lock-Down bit is set.
2
RTC Power Status (RTC_PWR_STS)—R/W. This bit is set when RTCRST#
indicates a weak or missing battery. The bit is not cleared by any type of reset. The
bit will remain set until the software clears it by writing a 0 back to this bit position.
Bit Description
Datasheet 529
LPC Interface Bridge Registers (D31:F0)
NOTE: RSMRST# is sampled using the RTC clock. Therefore, low times that are less than one RTC
clock period may not be detected by the PCH.
13.8.1.4 GEN_PMCON_LOCK—General Power Management Configuration
Lock Register
Offset Address: A6h Attribute: RO, R/WLO
Default Value: 00h Size: 8-bit
Lockable: No Usage: ACPI
Power Well: Core
C
1
Power Failure (PWR_FLR)—R/WC. This bit is in the RTC well, and is not cleared
by any type of reset except RTCRST#.
0 = Indicates that the trickle current has not failed since the last time the bit was
cleared. Software clears this bit by writing a 1 to it.
1 = Indicates that the trickle current (from the main battery or trickle supply) was
removed or failed.
NOTE: Clearing CMOS in a PCH-based platform can be done by using a jumper on
RTCRST# or GPI, or using SAFEMODE strap. Implementations should not
attempt to clear CMOS by using a jumper to pull VccRTC low.
0
AFTERG3_EN—R/W. This bit determines what state to go to when power is re-
applied after a power failure (G3 state). This bit is in the RTC well and is only
cleared by RTCRST# assertion.
0 = System will return to S0 state (boot) after power is re-applied.
1 = System will return to the S5 state (except if it was in S4, in which case it will
return to S4). In the S5 state, the only enabled wake event is the Power
Button or any enabled wake event that was preserved through the power
failure.
Bit Description
Bit Description
7:3 Reserved
2
SLP_S4# Stretching Policy Lock-Down—R/WLO. When set to 1, this bit locks
down the SLP_S4# Minimum Assertion Width, the SLP_S4# Assertion Stretch
Enable, the Disable SLP_S4# Stretching after G3 and SLP_S4# Assertion Stretch
Enable bits in the GEN_PMCON_3 register, making them read-only.
This bit becomes locked when a value of 1b is written to it. Writes of 0 to this bit
are always ignored.
This bit is cleared by platform reset.
1
ACPI_BASE_LOCK—R/WLO. When set to 1, this bit locks down the ACPI Base
Address Register (ABASE) at offset 40h. The Base Address Field becomes read-
only.
This bit becomes locked when a value of 1b is written to it. Writes of 0 to this bit
are always ignored. Once locked by writing 1, the only way to clear this bit is to
perform a platform reset.
0Reserved
LPC Interface Bridge Registers (D31:F0)
530 Datasheet
13.8.1.5 Chipset Initialization Register 4 (PM—D31:F0)
Offset Address: A9h Attribute: R/W
Default Value: 01h Size: 8-bit
Lockable: No Usage: ACPI, Legacy
Power Well: Core
13.8.1.6 BM_BREAK_EN Register (PM—D31:F0)
Offset Address: ABh Attribute: R/W
Default Value: 00h Size: 8-bit
Lockable: No Usage: ACPI, Legacy
Power Well: Core
Bit Description
7:0 CIR4 Field 1—R/W. BIOS must program this field to 45h.
Bit Description
7
STORAGE_BREAK_EN—R/W.
0 = Serial ATA traffic will not act as a break event.
1 = Serial ATA traffic acts as a break event, Serial ATA master activity will cause
BM_STS to be set and will cause a break from C3/C4.
6
PCIE_BREAK_EN—R/W.
0 = PCI Express* traffic will not act as a break event.
1 = PCI Express traffic acts as a break event, PCI Express master activity will cause
BM_STS to be set and will cause a break from C3/C4.
5
PCI_BREAK_EN—R/W.
0 = PCI traffic will not act as a break event.
1 = PCI traffic acts as a break event, PCI master activity will cause BM_STS to be set
and will cause a break from C3/C4.
4:3 Reserved
2
EHCI_BREAK_EN—R/W.
0 = EHCI traffic will not act as a break event.
1 = EHCI traffic acts as a break event, EHCI master activity will cause BM_STS to be
set and will cause a break from C3/C4.
1 Reserved
0
HDA_BREAK_EN—R/W.
0 = Intel® High Definition Audio traffic will not act as a break event.
1 = Intel® High Definition Audio traffic acts as a break event, Intel® High Definition
Audio master activity will cause BM_STS to be set and will cause a break from C3/
C4.
Datasheet 531
LPC Interface Bridge Registers (D31:F0)
13.8.1.7 PMIR—Power Management Initialization Register (PM—D31:F0)
Offset Address: ACh Attribute: R/W
Default Value: 00000000h Size: 32-bit
0
13.8.1.8 GPIO_ROUT—GPIO Routing Control Register
(PM—D31:F0)
Offset Address: B8h–BBh Attribute: R/W
Default Value: 00000000h Size: 32-bit
Lockable: No Power Well: Resume
Note: GPIOs that are not implemented will not have the corresponding bits implemented in
this register.
13.8.2 APM I/O Decode
Table 13-10 shows the I/O registers associated with APM support. This register space is
enabled in the PCI Device 31: Function 0 space (APMDEC_EN), and cannot be moved
(fixed I/O location).
Bit Description
31:30 PMIR Field 1—R/W. BIOS must program these bits to 11b.
Note: In the manufacturing/debug environments these bits will need to be left as default “00h”.
29:21 Reserved
20
CF9h Global Reset (CF9GR)—R/W.
When set, a CF9h write of 6h or Eh will cause a Global reset of both the Host and Intel®
ME partitions. If this bit is cleared, a CF9h write of 6h or Eh will only reset the host
partition. This bit field is not reset by a CF9h reset.
NOTE: Bit 20 is read only when bit 31 set to 1.
19:0 PMIR Field 0—R/W. BIOS must program these bits to 00300h.
Bit Description
31:30 GPIO15 Route—R/W. See bits 1:0 for description.
Same pattern for GPIO14 through GPIO3
5:4 GPIO2 Route—R/W. See bits 1:0 for description.
3:2 GPIO1 Route—R/W. See bits 1:0 for description.
1:0
GPIO0 Route—R/W. GPIO can be routed to cause an NMI, SMI# or SCI when the
GPIO[n]_STS bit is set. If the GPIO0 is not set to an input, this field has no effect.
If the system is in an S1–S5 state and if the GPE0_EN bit is also set, then the GPIO can
cause a Wake event, even if the GPIO is NOT routed to cause an NMI, SMI# or SCI.
00 = No effect.
01 = SMI# (if corresponding ALT_GPI_SMI_EN bit is also set)
10 = SCI (if corresponding GPE0_EN bit is also set)
11 = NMI (If corresponding GPI_NMI_EN is also set)
Table 13-10. APM Register Map
Address Mnemonic Register Name Default Type
B2h APM_CNT Advanced Power Management Control Port 00h R/W
B3h APM_STS Advanced Power Management Status Port 00h R/W
LPC Interface Bridge Registers (D31:F0)
532 Datasheet
13.8.2.1 APM_CNT—Advanced Power Management Control Port Register
I/O Address: B2h Attribute: R/W
Default Value: 00h Size: 8-bit
Lockable: No Usage: Legacy Only
Power Well: Core
13.8.2.2 APM_STS—Advanced Power Management Status Port Register
I/O Address: B3h Attribute: R/W
Default Value: 00h Size: 8-bit
Lockable: No Usage: Legacy Only
Power Well: Core
13.8.3 Power Management I/O Registers
Table 13-11 shows the registers associated with ACPI and Legacy power management
support. These registers are enabled in the PCI Device 31: Function 0 space
(PM_IO_EN), and can be moved to any I/O location (128-byte aligned). The registers
are defined to support the ACPI 3.0a specification, and use the same bit names.
Note: All reserved bits and registers will always return 0 when read, and will have no effect
when written.
Bit Description
7:0
Used to pass an APM command between the OS and the SMI handler. Writes to this
port not only store data in the APMC register, but also generates an SMI# when the
APMC_EN bit is set.
Bit Description
7:0 Used to pass data between the OS and the SMI handler. Basically, this is a scratchpad
register and is not affected by any other register or function (other than a PCI reset).
Table 13-11. ACPI and Legacy I/O Register Map (Sheet 1 of 2)
PMBASE
+ Offset Mnemonic Register Name ACPI Pointer Default Type
00h–01h PM1_STS PM1 Status PM1a_EVT_BLK 0000h R/WC
02h–03h PM1_EN PM1 Enable PM1a_EVT_BLK+
20000h R/W
04h–07h PM1_CNT PM1 Control PM1a_CNT_BLK 00000000h R/W, WO
08h–0Bh PM1_TMR PM1 Timer PMTMR_BLK xx000000h RO
0Ch–1Fh Reserved
20–27h GPE0_STS General Purpose Event 0
Status GPE0_BLK 00000000h R/WC
28–2Fh GPE0_EN General Purpose Event 0
Enables GPE0_BLK+8
00000000
00000000h R/W
30h–33h SMI_EN SMI# Control and Enable 00000002h R/W, WO,
R/WO
34h–37h SMI_STS SMI Status 00000000h R/WC, RO
38h–39h ALT_GP_SMI_EN Alternate GPI SMI Enable 0000h R/W
3Ah–3Bh ALT_GP_SMI_STS Alternate GPI SMI Status 0000h R/WC
Datasheet 533
LPC Interface Bridge Registers (D31:F0)
13.8.3.1 PM1_STS—Power Management 1 Status Register
I/O Address: PMBASE + 00h
(ACPI PM1a_EVT_BLK)Attribute: R/WC
Default Value: 0000h Size: 16-bit
Lockable: No Usage: ACPI or Legacy
Power Well: Bits 07: Core,
Bits 815: Resume, except Bit 11 in RTC
If bit 10 or 8 in this register is set, and the corresponding _EN bit is set in the PM1_EN
register, then the PCH will generate a Wake Event. Once back in an S0 state (or if
already in an S0 state when the event occurs), the PCH will also generate an SCI if the
SCI_EN bit is set, or an SMI# if the SCI_EN bit is not set.
Note: Bit 5 does not cause an SMI# or a wake event. Bit 0 does not cause a wake event but
can cause an SMI# or SCI.
3Ch–3Dh UPRWC USB Per-Port Registers Write
Control 0000h R/WC, RO,
R/WO
3Eh–41h Reserved
42h GPE_CNTL General Purpose Event
Control 00h RO, R/W
43h Reserved
44h–45h DEVACT_STS Device Activity Status 0000h R/WC
46h–4Fh Reserved
50h PM2_CNT PM2 Control PM2a_CNT_BLK 00h R/W
51h–5Fh Reserved
60h–7Fh Reserved for TCO
Table 13-11. ACPI and Legacy I/O Register Map (Sheet 2 of 2)
PMBASE
+ Offset Mnemonic Register Name ACPI Pointer Default Type
Bit Description
15
Wake Status (WAK_STS)R/WC. This bit is not affected by hard resets caused by a
CF9 write, but is reset by RSMRST#.
0 = Software clears this bit by writing a 1 to it.
1 = Set by hardware when the system is in one of the sleep states (using the SLP_EN
bit) and an enabled wake event occurs. Upon setting this bit, the PCH will transition
the system to the ON state.
If the AFTERG3_EN bit is not set and a power failure (such as removed batteries)
occurs without the SLP_EN bit set, the system will return to an S0 state when power
returns, and the WAK_STS bit will not be set.
If the AFTERG3_EN bit is set and a power failure occurs without the SLP_EN bit having
been set, the system will go into an S5 state when power returns, and a subsequent
wake event will cause the WAK_STS bit to be set. Note that any subsequent wake event
would have to be caused by either a Power Button press, or an enabled wake event that
was preserved through the power failure (enable bit in the RTC well).
LPC Interface Bridge Registers (D31:F0)
534 Datasheet
14
PCI Express Wake Status (PCIEXPWAK_STS)—R/WC.
0 = Software clears this bit by writing a 1 to it. If the WAKE# pin is still active during
the write or the PME message received indication has not been cleared in the root
port, then the bit will remain active (that is, all inputs to this bit are level-
sensitive).
1 = This bit is set by hardware to indicate that the system woke due to a PCI Express
wakeup event. This wakeup event can be caused by the PCI Express WAKE# pin
being active or receipt of a PCI Express PME message at a root port. This bit is set
only when one of these events causes the system to transition from a non-S0
system power state to the S0 system power state. This bit is set independent of the
state of the PCIEXP_WAKE_DIS bit.
NOTE: This bit does not itself cause a wake event or prevent entry to a sleeping state.
Thus, if the bit is 1 and the system is put into a sleeping state, the system will
not automatically wake.
13:12 Reserved
11
Power Button Override Status (PWRBTNOR_STS)—R/WC.
0 = Software clears this bit by writing a 1 to it.
1 = This bit is set any time a Power Button Override occurs (that is, the power button is
pressed for at least 4 consecutive seconds), due to the corresponding bit in the
SMBus slave message, Intel® ME Initiated Power Button Override, Intel® ME
Initiated Host Reset with Power down or due to an internal thermal sensor
catastrophic condition. The power button override causes an unconditional
transition to the S5 state. The BIOS or SCI handler clears this bit by writing a 1 to
it. This bit is not affected by hard resets using CF9h writes, and is not reset by
RSMRST#. Thus, this bit is preserved through power failures. Note that if this bit is
still asserted when the global SCI_EN is set then an SCI will be generated.
10
RTC Status (RTC_STS)—R/WC. This bit is not affected by hard resets caused by a
CF9 write, but is reset by RSMRST#.
0 = Software clears this bit by writing a 1 to it.
1 = Set by hardware when the RTC generates an alarm (assertion of the IRQ8# signal).
Additionally if the RTC_EN bit (PMBASE + 02h, bit 10) is set, the setting of the
RTC_STS bit will generate a wake event.
9
ME_STS—R/WC. This bit is set when the Intel® Management Engine generates a Non-
Maskable wake event, and is not affected by any other enable bit. When this bit is set,
the Host Power Management logic wakes to S0.
This bit is only set by hardware and can only be reset by writing a one to this bit
position. This bit is not affected by hard resets caused by a CF9 write, but is reset by
RSMRST#.
8
Power Button Status (PWRBTN__STS)—R/WC. This bit is not affected by hard
resets caused by a CF9 write.
0 = If the PWRBTN# signal is held low for more than 4 seconds, the hardware clears
the PWRBTN_STS bit, sets the PWRBTNOR_STS bit, and the system transitions to
the S5 state with only PWRBTN# enabled as a wake event.
This bit can be cleared by software by writing a one to the bit position.
1 = This bit is set by hardware when the PWRBTN# signal is asserted Low, independent
of any other enable bit.
In the S0 state, while PWRBTN_EN and PWRBTN_STS are both set, an SCI (or
SMI# if SCI_EN is not set) will be generated.
In any sleeping state S1–S5, while PWRBTN_EN (PMBASE + 02h, bit 8) and
PWRBTN_STS are both set, a wake event is generated.
NOTE: If the PWRBTN_STS bit is cleared by software while the PWRBTN# signal is sell
asserted, this will not cause the PWRBN_STS bit to be set. The PWRBTN# signal
must go inactive and active again to set the PWRBTN_STS bit.
Bit Description
Datasheet 535
LPC Interface Bridge Registers (D31:F0)
7:6 Reserved
5
Global Status (GBL _STS)—R/WC.
0 = The SCI handler should then clear this bit by writing a 1 to the bit location.
1 = Set when an SCI is generated due to BIOS wanting the attention of the SCI
handler. BIOS has a corresponding bit, BIOS_RLS, which will cause an SCI and set
this bit.
4
Bus Master Status (BM_STS)—R/WC. This bit will not cause a wake event, SCI or
SMI#.
0 = Software clears this bit by writing a 1 to it.
1 = Set by the PCH when a PCH-visible bus master requests access to memory or the
BM_BUSY# signal is active.
3:1 Reserved
0
Timer Overflow Status (TMROF_STS)—R/WC.
0 = The SCI or SMI# handler clears this bit by writing a 1 to the bit location.
1 = This bit gets set any time bit 22 of the 24-bit timer goes high (bits are numbered
from 0 to 23). This will occur every 2.3435 seconds. When the TMROF_EN bit
(PMBASE + 02h, bit 0) is set, then the setting of the TMROF_STS bit will
additionally generate an SCI or SMI# (depending on the SCI_EN).
Bit Description
LPC Interface Bridge Registers (D31:F0)
536 Datasheet
13.8.3.2 PM1_EN—Power Management 1 Enable Register
I/O Address: PMBASE + 02h
(ACPI PM1a_EVT_BLK + 2) Attribute: R/W
Default Value: 0000h Size: 16-bit
Lockable: No Usage: ACPI or Legacy
Power Well: Bits 07: Core,
Bits 89, 1115: Resume,
Bit 10: RTC
Bit Description
15 Reserved
14
PCI Express* Wake Disable(PCIEXPWAK_DIS)—R/W. Modification of this bit has
no impact on the value of the PCIEXP_WAKE_STS bit.
0 = Inputs to the PCIEXP_WAKE_STS bit in the PM1 Status register enabled to wake
the system.
1 = Inputs to the PCIEXP_WAKE_STS bit in the PM1 Status register disabled from
waking the system.
13:11 Reserved
10
RTC Event Enable (RTC_EN)—R/W. This bit is in the RTC well to allow an RTC event
to wake after a power failure. This bit is not cleared by any reset other than RTCRST#
or a Power Button Override event.
0 = No SCI (or SMI#) or wake event is generated then RTC_STS (PMBASE + 00h, bit
10) goes active.
1 = An SCI (or SMI#) or wake event will occur when this bit is set and the RTC_STS bit
goes active.
9 Reserved
8
Power Button Enable (PWRBTN_EN)—R/W. This bit is used to enable the setting of
the PWRBTN_STS bit to generate a power management event (SMI#, SCI).
PWRBTN_EN has no effect on the PWRBTN_STS bit (PMBASE + 00h, bit 8) being set by
the assertion of the power button. The Power Button is always enabled as a Wake
event.
0 = Disable.
1 = Enable.
7:6 Reserved
5
Global Enable (GBL_EN)—R/W. When both the GBL_EN and the GBL_STS bit
(PMBASE + 00h, bit 5) are set, an SCI is raised.
0 = Disable.
1 = Enable SCI on GBL_STS going active.
4:1 Reserved
0
Timer Overflow Interrupt Enable (TMROF_EN)—R/W. Works in conjunction with
the SCI_EN bit (PMBASE + 04h, bit 0) as described below:
0 X No SMI# or SCI
10 SMI#
11 SCI
Datasheet 537
LPC Interface Bridge Registers (D31:F0)
13.8.3.3 PM1_CNT—Power Management 1 Control Register
I/O Address: PMBASE + 04h
(ACPI PM1a_CNT_BLK) Attribute: R/W, WO
Default Value: 00000000h Size: 32-bit
Lockable: No Usage: ACPI or Legacy
Power Well: Bits 07: Core,
Bits 812: RTC,
Bits 1315: Resume
Bit Description
31:14 Reserved
13 Sleep Enable (SLP_EN)—WO. Setting this bit causes the system to sequence into
the Sleep state defined by the SLP_TYP field.
12:10
Sleep Type (SLP_TYP)—R/W. This 3-bit field defines the type of Sleep the system
should enter when the SLP_EN bit is set to 1. These bits are only reset by RTCRST#.
9:3 Reserved
2
Global Release (GBL_RLS)—WO.
0 = This bit always reads as 0.
1 = ACPI software writes a 1 to this bit to raise an event to the BIOS. BIOS software
has a corresponding enable and status bits to control its ability to receive ACPI
events.
1
Bus Master Reload (BM_RLD)—R/W. This bit is treated as a scratchpad bit. This
bit is reset to 0 by PLTRST#
0 = Bus master requests will not cause a break from the C3 state.
1 = Enables Bus Master requests (internal or external) to cause a break from the C3
state.
If software fails to set this bit before going to C3 state, the PCH will still return to a
snoopable state from C3 or C4 states due to bus master activity.
0
SCI Enable (SCI_EN)—R/W. Selects the SCI interrupt or the SMI# interrupt for
various events including the bits in the PM1_STS register (bit 10, 8, 0), and bits in
GPE0_STS.
0 = These events will generate an SMI#.
1 = These events will generate an SCI.
000b ON: Typically maps to S0 state.
001b Puts CPU in S1 state.
010b Reserved
011b Reserved
100b Reserved
101b Suspend-To-RAM. Assert SLP_S3#: Typically maps to S3 state.
110b Suspend-To-Disk. Assert SLP_S3#, and SLP_S4#: Typically maps to
S4 state.
111b Soft Off. Assert SLP_S3#, SLP_S4#, and SLP_S5#: Typically maps to
S5 state.
LPC Interface Bridge Registers (D31:F0)
538 Datasheet
13.8.3.4 PM1_TMR—Power Management 1 Timer Register
I/O Address: PMBASE + 08h
(ACPI PMTMR_BLK)
Attribute: RO
Default Value: xx000000h Size: 32-bit
Lockable: No Usage: ACPI
Power Well: Core
13.8.3.5 PM1_TMR—Power Management 1 Timer Register
I/O Address: PMBASE + 08h
(ACPI PMTMR_BLK)
Attribute: RO
Default Value: xx000000h Size: 32-bit
Lockable: No Usage: ACPI
Power Well: Core
Bit Description
31:24 Reserved
23:0
Timer Value (TMR_VAL)—RO. Returns the running count of the PM timer. This
counter runs off a 3.579545 MHz clock (14.31818 MHz divided by 4). It is reset to 0
during a PCI reset, and then continues counting as long as the system is in the S0
state. After an S1 state, the counter will not be reset (it will continue counting from the
last value in S0 state.
Anytime bit 22 of the timer goes HIGH to LOW (bits referenced from 0 to 23), the
TMROF_STS bit (PMBASE + 00h, bit 0) is set. The High-to-Low transition will occur
every 2.3435 seconds. If the TMROF_EN bit (PMBASE + 02h, bit 0) is set, an SCI
interrupt is also generated.
Bit Description
31:24 Reserved
23:0
Timer Value (TMR_VAL)—RO. Returns the running count of the PM timer. This
counter runs off a 3.579545 MHz clock (14.31818 MHz divided by 4). It is reset to 0
during a PCI reset, and then continues counting as long as the system is in the S0
state. After an S1 state, the counter will not be reset (it will continue counting from the
last value in S0 state.
Anytime bit 22 of the timer goes HIGH to LOW (bits referenced from 0 to 23), the
TMROF_STS bit (PMBASE + 00h, bit 0) is set. The High-to-Low transition will occur
every 2.3435 seconds. If the TMROF_EN bit (PMBASE + 02h, bit 0) is set, an SCI
interrupt is also generated.
Datasheet 539
LPC Interface Bridge Registers (D31:F0)
13.8.3.6 GPE0_STS—General Purpose Event 0 Status Register
I/O Address: PMBASE + 20h
(ACPI GPE0_BLK)Attribute: Bits 0:32 R/WC
Bits 33:63 RO
Default Value: 0000000000000000h Size: 64-bit
Lockable: No Usage: ACPI
Power Well: Resume
This register is symmetrical to the General Purpose Event 0 Enable Register. Unless
indicated otherwise below, if the corresponding _EN bit is set, then when the _STS bit
get set, the PCH will generate a Wake Event. Once back in an S0 state (or if already in
an S0 state when the event occurs), the PCH will also generate an SCI if the SCI_EN bit
is set, or an SMI# if the SCI_EN bit (PMBASE + 04h, bit 0) is not set. Bits 31:16 are
reset by a CF9h write; bits 63:32 and 15:0 are not. All are reset by RSMRST#.
Bit Description
63:36 Reserved
35
GPIO27_STS—R/WC.
0 = Disable.
1 = Set by hardware and can be reset by writing a one to this bit position or a
resume well reset. This bit is set at the level specified in GP27IO_POL. Note that
GPIO27 is always monitored as an input for the purpose of setting this bit,
regardless of the actual GPIO configuration.,
34:32 Reserved
31:16
GPIOn_STS—R/WC.
0 = Software clears this bit by writing a 1 to it.
1 = These bits are set any time the corresponding GPIO is set up as an input and the
corresponding GPIO signal is high (or low if the corresponding GP_INV bit is set).
If the corresponding enable bit is set in the GPE0_EN register, then when the
GPIO[n]_STS bit is set:
If the system is in an S1–S5 state, the event will also wake the system.
If the system is in an S0 state (or upon waking back to an S0 state), a SCI will be
caused depending on the GPIO_ROUT bits (D31:F0:B8h, bits 31:30) for the
corresponding GPI.
NOTE: Mapping is as follows: bit 31 corresponds to GPIO[15]... and bit 16
corresponds to GPIO[0].
15:14 Reserved
13
PME_B0_STS—R/WC. This bit will be set to 1 by the PCH when any internal device
with PCI Power Management capabilities on bus 0 asserts the equivalent of the PME#
signal. Additionally, if the PME_B0_EN bit is set, and the system is in an S0 state,
then the setting of the PME_B0_STS bit will generate an SCI (or SMI# if SCI_EN is
not set). If the PME_B0_STS bit is set, and the system is in an S1–S4 state (or S5
state due to SLP_TYP and SLP_EN), then the setting of the PME_B0_STS bit will
generate a wake event, and an SCI (or SMI# if SCI_EN is not set) will be generated.
If the system is in an S5 state due to power button override, then the PME_B0_STS
bit will not cause a wake event or SCI.
The default for this bit is 0. Writing a 1 to this bit position clears this bit.
NOTE: HD audio wake events are reported in this bit.
Intel® Management Engine “maskable” wake events are also reported in this bit.
12 Reserved
LPC Interface Bridge Registers (D31:F0)
540 Datasheet
11
PME_STS—R/WC.
0 = Software clears this bit by writing a 1 to it.
1 = Set by hardware when the PME# signal goes active. Additionally, if the PME_EN
bit is set, and the system is in an S0 state, then the setting of the PME_STS bit
will generate an SCI or SMI# (if SCI_EN is not set). If the PME_EN bit is set, and
the system is in an S1–S4 state (or S5 state due to setting SLP_TYP and
SLP_EN), then the setting of the PME_STS bit will generate a wake event, and an
SCI will be generated. If the system is in an S5 state due to power button
override or a power failure, then PME_STS will not cause a wake event or SCI.
10
(Desktop
Only)
Reserved
10
(Mobile
Only)
BATLOW_STS—R/WC. (Mobile Only) Software clears this bit by writing a 1 to it.
0 = BATLOW# Not asserted
1 = Set by hardware when the BATLOW# signal is asserted.
9
PCI_EXP_STS—R/WC.
0 = Software clears this bit by writing a 1 to it.
1 = Set by hardware to indicate that:
The PME event message was received on one or more of the PCI Express* ports
An Assert PMEGPE message received from the Processor using DMI
NOTES:
1. The PCI WAKE# pin has no impact on this bit.
2. If the PCI_EXP_STS bit went active due to an Assert PMEGPE message, then a
Deassert PMEGPE message must be received prior to the software write for
the bit to be cleared.
3. If the bit is not cleared and the corresponding PCI_EXP_EN bit is set, the
level-triggered SCI will remain active.
4. A race condition exists where the PCI Express device sends another PME
message because the PCI Express device was not serviced within the time
when it must resend the message. This may result in a spurious interrupt,
and this is comprehended and approved by the PCI Express* Specification,
Revision 1.0a. The window for this race condition is approximately 95-105
milliseconds.
8
RI_STS—R/WC.
0 = Software clears this bit by writing a 1 to it.
1 = Set by hardware when the RI# input signal goes active.
7
SMBus Wake Status (SMB_WAK_STS)—R/WC. Software clears this bit by writing
a 1 to it.
0 = Wake event Not caused by the PCH’s SMBus logic.
1 = Set by hardware to indicate that the wake event was caused by the PCH’s SMBus
logic.This bit will be set by the WAKE/SMI# command type, even if the system is
already awake. The SMI handler should then clear this bit.
NOTES:
1. The SMBus controller will independently cause an SMI# so this bit does not
need to do so (unlike the other bits in this register).
2. This bit is set by the SMBus slave command 01h (Wake/SMI#) even when the
system is in the S0 state. Therefore, to avoid an instant wake on subsequent
transitions to sleep states, software must clear this bit after each reception of
the Wake/SMI# command or just prior to entering the sleep state.
3. The SMBALERT_STS bit (D31:F3:I/O Offset 00h:Bit 5) should be cleared by
software before the SMB_WAK_STS bit is cleared.
Bit Description
Datasheet 541
LPC Interface Bridge Registers (D31:F0)
13.8.3.7 GPE0_EN—General Purpose Event 0 Enables Register
I/O Address: PMBASE + 28h
(ACPI GPE0_BLK + 8)Attribute: R/W
Default Value: 0000000000000000h Size: 64-bit
Lockable: No Usage: ACPI
Power Well: Bits 0–7, 9, 12, 14–63 Resume,
Bits 8, 10–11, 13 RTC
This register is symmetrical to the General Purpose Event 0 Status Register. All the bits
in this register should be cleared to 0 based on a Power Button Override or processor
Thermal Trip event. The resume well bits are all cleared by RSMRST#. The RTC well bits
are cleared by RTCRST#.
6
TCOSCI_STS—R/WC. Software clears this bit by writing a 1 to it.
0 = TOC logic or thermal sensor logic did Not cause SCI.
1 = Set by hardware when the TCO logic or thermal sensor logic causes an SCI.
5:3 Reserved
2SWGPE_STS—R/WC.
The SWGPE_CTRL bit (bit 1 of GPE_CTRL reg) acts as a level input to this bit.
1
HOT_PLUG_STS—R/WC.
0 = This bit is cleared by writing a 1 to this bit position.
1 = When a PCI Express* Hot-Plug event occurs. This will cause an SCI if the
HOT_PLUG_EN bit is set in the GEP0_EN register.
0 Reserved
Bit Description
Bit Description
63:36 Reserved
35
GPIO27_EN—R/W.
0 = Disable.
1 = Enable the setting of the GPIO27_STS bit to generate a wake event/SCI/SMI#.
34:32 Reserved
31:16
GPIn_EN—R/W. These bits enable the corresponding GPI[n]_STS bits being set to
cause a SCI, and/or wake event. These bits are cleared by RSMRST#.
NOTE: Mapping is as follows: bit 31 corresponds to GPIO15... and bit 16
corresponds to GPIO0.
15 Reserved
14 Reserved
13
PME_B0_EN—R/W.
0 = Disable
1 = Enables the setting of the PME_B0_STS bit to generate a wake event and/or an
SCI or SMI#. PME_B0_STS can be a wake event from the S1–S4 states, or from
S5 (if entered using SLP_TYP and SLP_EN) or power failure, but not Power
Button Override. This bit defaults to 0.
NOTE: It is only cleared by Software or RTCRST#. It is not cleared by CF9h writes.
12 Reserved
11
PME_EN—R/W.
0 = Disable.
1 = Enables the setting of the PME_STS to generate a wake event and/or an SCI.
PME# can be a wake event from the S1–S4 state or from S5 (if entered using
SLP_EN, but not power button override).
LPC Interface Bridge Registers (D31:F0)
542 Datasheet
10
(Desktop
Only)
Reserved
10
(Mobile
Only)
BATLOW_EN—R/W. (Mobile Only)
0 = Disable.
1 = Enables the BATLOW# signal to cause an SMI# or SCI (depending on the
SCI_EN bit) when it goes low. This bit does not prevent the BATLOW# signal
from inhibiting the wake event.
9
PCI_EXP_EN—R/W.
0 = Disable SCI generation upon PCI_EXP_STS bit being set.
1 = Enables PCH to cause an SCI when PCI_EXP_STS bit is set. This is used to allow
the PCI Express* ports, including the link to the Processor, to cause an SCI due
to wake/PME events.
8
RI_EN—R/W. The value of this bit will be maintained through a G3 state and is not
affected by a hard reset caused by a CF9h write.
0 = Disable.
1 = Enables the setting of the RI_STS to generate a wake event.
7 Reserved
6
TCOSCI_EN—R/W.
0 = Disable.
1 = Enables the setting of the TCOSCI_STS to generate an SCI.
5:3 Reserved
2
SWGPE_EN—R/W. This bit allows software to control the assertion of SWGPE_STS
bit. This bit This bit, when set to 1, enables the SW GPE function. If SWGPE_CTRL is
written to a 1, hardware will set SWGPE_STS (acts as a level input)
If SWGPE_STS, SWGPE_EN, and SCI_EN are all 1's, an SCI will be generated
If SWGPE_STS = 1, SWGPE_EN = 1, SCI_EN = 0, and GBL_SMI_EN = 1 then an
SMI# will be generated
1
HOT_PLUG_EN—R/W.
0 = Disables SCI generation upon the HOT_PLUG_STS bit being set.
1 = Enables the PCH to cause an SCI when the HOT_PLUG_STS bit is set. This is
used to allow the PCI Express ports to cause an SCI due to hot-plug events.
0 Reserved
Bit Description
Datasheet 543
LPC Interface Bridge Registers (D31:F0)
13.8.3.8 SMI_EN—SMI Control and Enable Register
I/O Address: PMBASE + 30h Attribute: R/W, R/WO, WO
Default Value: 00000002h Size: 32 bit
Lockable: No Usage: ACPI or Legacy
Power Well: Core
Note: This register is symmetrical to the SMI status register.
Bit Description
31:28 Reserved
27
GPIO_UNLOCK_SMI_EN—R/WO. Setting this bit will cause the Intel® PCH to
generate an SMI# when the GPIO_UNLOCK_SMI_STS bit is set in the SMI_STS
register.
Once written to 1, this bit can only be cleared by PLTRST#.
26:19 Reserved
18
INTEL_USB2_EN—R/W.
0 = Disable
1 = Enables Intel-Specific USB2 SMI logic to cause SMI#.
17
LEGACY_USB2_EN—R/W.
0 = Disable
1 = Enables legacy USB2 logic to cause SMI#.
16:15 Reserved
14
PERIODIC_EN—R/W.
0 = Disable.
1 = Enables the PCH to generate an SMI# when the PERIODIC_STS bit (PMBASE +
34h, bit 14) is set in the SMI_STS register (PMBASE + 34h).
13
TCO_EN—R/W.
0 = Disables TCO logic generating an SMI#. Note that if the NMI2SMI_EN bit is set,
SMIs that are caused by re-routed NMIs will not be gated by the TCO_EN bit. Even
if the TCO_EN bit is 0, NMIs will still be routed to cause SMIs.
1 = Enables the TCO logic to generate SMI#.
NOTE: This bit cannot be written once the TCO_LOCK bit is set.
12 Reserved
11
MCSMI_ENMicrocontroller SMI Enable (MCSMI_EN)—R/W.
0 = Disable.
1 = Enables PCH to trap accesses to the microcontroller range (62h or 66h) and
generate an SMI#. Note that “trapped’ cycles will be claimed by the PCH on PCI,
but not forwarded to LPC.
10:8 Reserved
7
BIOS Release (BIOS_RLS)—WO.
0 = This bit will always return 0 on reads. Writes of 0 to this bit have no effect.
1 = Enables the generation of an SCI interrupt for ACPI software when a one is written
to this bit position by BIOS software.
NOTE: GBL_STS being set will cause an SCI, even if the SCI_EN bit is not set.
Software must take great care not to set the BIOS_RLS bit (which causes
GBL_STS to be set) if the SCI handler is not in place.
LPC Interface Bridge Registers (D31:F0)
544 Datasheet
6
Software SMI# Timer Enable (SWSMI_TMR_EN)—R/W.
0 = Disable. Clearing the SWSMI_TMR_EN bit before the timer expires will reset the
timer and the SMI# will not be generated.
1 = Starts Software SMI# Timer. When the SWSMI timer expires (the timeout period
depends upon the SWSMI_RATE_SEL bit setting), SWSMI_TMR_STS is set and an
SMI# is generated. SWSMI_TMR_EN stays set until cleared by software.
5
APMC_EN—R/W.
0 = Disable. Writes to the APM_CNT register will not cause an SMI#.
1 = Enables writes to the APM_CNT register to cause an SMI#.
4
SLP_SMI_EN—R/W.
0 = Disables the generation of SMI# on SLP_EN. Note that this bit must be 0 before
the software attempts to transition the system into a sleep state by writing a 1 to
the SLP_EN bit.
1 = A write of 1 to the SLP_EN bit (bit 13 in PM1_CNT register) will generate an SMI#,
and the system will not transition to the sleep state based on that write to the
SLP_EN bit.
3
LEGACY_USB_EN—R/W.
0 = Disable.
1 = Enables legacy USB circuit to cause SMI#.
2
BIOS_EN—R/W.
0 = Disable.
1 = Enables the generation of SMI# when ACPI software writes a 1 to the GBL_RLS bit
(D31:F0:PMBase + 04h:bit 2). Note that if the BIOS_STS bit (D31:F0:PMBase +
34h:bit 2), which gets set when software writes 1 to GBL_RLS bit, is already a 1 at
the time that BIOS_EN becomes 1, an SMI# will be generated when BIOS_EN gets
set.
1
End of SMI (EOS)—R/W (special). This bit controls the arbitration of the SMI signal to
the processor. This bit must be set for the PCH to assert SMI# low to the processor
after SMI# has been asserted previously.
0 = Once the PCH asserts SMI# low, the EOS bit is automatically cleared.
1 = When this bit is set to 1, SMI# signal will be de-asserted for 4 PCI clocks before its
assertion. In the SMI handler, the processor should clear all pending SMIs (by
servicing them and then clearing their respective status bits), set the EOS bit, and
exit SMM. This will allow the SMI arbiter to re-assert SMI upon detection of an SMI
event and the setting of a SMI status bit.
NOTE: The PCH is able to generate 1st SMI after reset even though EOS bit is not set.
Subsequent SMI require EOS bit is set.
0
GBL_SMI_EN—R/W.
0 = No SMI# will be generated by PCH. This bit is reset by a PCI reset event.
1 = Enables the generation of SMI# in the system upon any enabled SMI event.
NOTE: When the SMI_LOCK bit is set, this bit cannot be changed.
Bit Description
Datasheet 545
LPC Interface Bridge Registers (D31:F0)
13.8.3.9 SMI_STS—SMI Status Register
I/O Address: PMBASE + 34h Attribute: RO, R/WC
Default Value: 00000000h Size: 32-bit
Lockable: No Usage: ACPI or Legacy
Power Well: Core
Note: If the corresponding _EN bit is set when the _STS bit is set, the PCH will cause an SMI#
(except bits 8–10 and 12, which do not need enable bits since they are logic ORs of
other registers that have enable bits). The PCH uses the same GPE0_EN register (I/O
address: PMBase+2Ch) to enable/disable both SMI and ACPI SCI general purpose input
events. ACPI OS assumes that it owns the entire GPE0_EN register per the ACPI
specification. Problems arise when some of the general-purpose inputs are enabled as
SMI by BIOS, and some of the general purpose inputs are enabled for SCI. In this case
ACPI OS turns off the enabled bit for any GPIx input signals that are not indicated as
SCI general-purpose events at boot, and exit from sleeping states. BIOS should define
a dummy control method which prevents the ACPI OS from clearing the SMI GPE0_EN
bits.
Bit Description
31:28 Reserved
27 GPIO_UNLOCK_SMI_STS—R/WC. This bit will be set if the GPIO registers lockdown
logic is requesting an SMI#. Writing a 1 to this bit position clears this bit to 0.
26
SPI_STSRO. This bit will be set if the SPI logic is generating an SMI#. This bit is read
only because the sticky status and enable bits associated with this function are located
in the SPI registers.
25:22 Reserved
21
MONITOR_STS—RO. This bit will be set if the Trap/SMI logic has caused the SMI. This
will occur when the processor or a bus master accesses an assigned register (or a
sequence of accesses). See Section 10.1.26 through Section 10.1.42 for details on the
specific cause of the SMI.
20 PCI_EXP_SMI_STS—RO. PCI Express* SMI event occurred. This could be due to a
PCI Express PME event or Hot-Plug event.
19 Reserved
18
INTEL_USB2_STS—RO. This non-sticky read-only bit is a logical OR of each of the
SMI status bits in the Intel-Specific USB2 SMI Status Register ANDed with the
corresponding enable bits. Additionally, the Port Disable Write Enable SMI is reported in
this bit; the specific status bit for this event is contained in the USB Per-Port Registers
Write Control Register in this I/O space. This bit will not be active if the enable bits are
not set. Writes to this bit will have no effect.
All integrated USB2 Host Controllers are represented with this bit.
17
LEGACY_USB2_STS—RO. This non-sticky read-only bit is a logical OR of each of the
SMI status bits in the USB2 Legacy Support Register ANDed with the corresponding
enable bits. This bit will not be active if the enable bits are not set. Writes to this bit will
have no effect.
All integrated USB2 Host Controllers are represented with this bit.
LPC Interface Bridge Registers (D31:F0)
546 Datasheet
16
SMBus SMI Status (SMBUS_SMI_STS)—R/WC. Software clears this bit by writing a
1 to it.
0 = This bit is set from the 64 kHz clock domain used by the SMBus. Software must
wait at least 15.63 μs after the initial assertion of this bit before clearing it.
1 = Indicates that the SMI# was caused by:
1. The SMBus Slave receiving a message that an SMI# should be caused, or
2. The SMBALERT# signal goes active and the SMB_SMI_EN bit is set and the
SMBALERT_DIS bit is cleared, or
3. The SMBus Slave receiving a Host Notify message and the
HOST_NOTIFY_INTREN and the SMB_SMI_EN bits are set, or
4. The PCH detecting the SMLINK_SLAVE_SMI command while in the S0 state.
15
SERIRQ_SMI_STS—RO.
0 = SMI# was not caused by the SERIRQ decoder.
1 = Indicates that the SMI# was caused by the SERIRQ decoder.
NOTE: This is not a sticky bit
14
PERIODIC_STS—R/WC. Software clears this bit by writing a 1 to it.
0 = Software clears this bit by writing a 1 to it.
1 = This bit is set at the rate determined by the PER_SMI_SEL bits. If the
PERIODIC_EN bit (PMBASE + 30h, bit 14) is also set, the PCH generates an SMI#.
13
TCO_STS—R/WC. Software clears this bit by writing a 1 to it.
0 = SMI# not caused by TCO logic.
1 = Indicates the SMI# was caused by the TCO logic. Note that this is not a wake
event.
12
Device Monitor Status (DEVMON_STS)—RO.
0 = SMI# not caused by Device Monitor.
1 = Set if bit 0 of the DEVACT_STS register (PMBASE + 44h) is set. The bit is not sticky,
so writes to this bit will have no effect.
11
Microcontroller SMI# Status (MCSMI_STS)—R/WC. Software clears this bit by
writing a 1 to it.
0 = Indicates that there has been no access to the power management microcontroller
range (62h or 66h).
1 = Set if there has been an access to the power management microcontroller range
(62h or 66h) and the Microcontroller Decode Enable #1 bit in the LPC Bridge I/O
Enables configuration register is 1 (D31:F0:Offset 82h:bit 11). Note that this
implementation assumes that the Microcontroller is on LPC. If this bit is set, and
the MCSMI_EN bit is also set, the PCH will generate an SMI#.
10
GPE0_STS—RO. This bit is a logical OR of the bits in the ALT_GP_SMI_STS register
that are also set up to cause an SMI# (as indicated by the GPI_ROUT registers) and
have the corresponding bit set in the ALT_GP_SMI_EN register. Bits that are not routed
to cause an SMI# will have no effect on this bit.
0 = SMI# was not generated by a GPI assertion.
1 = SMI# was generated by a GPI assertion.
9
GPE0_STS—RO. This bit is a logical OR of the bits 47:32, 14:10, 8, 6:2, and 0 in the
GPE0_STS register (PMBASE + 28h) that also have the corresponding bit set in the
GPE0_EN register (PMBASE + 2Ch).
0 = SMI# was not generated by a GPE0 event.
1 = SMI# was generated by a GPE0 event.
8
PM1_STS_REG—RO. This is an ORs of the bits in the ACPI PM1 Status Register (offset
PMBASE+00h) that can cause an SMI#.
0 = SMI# was not generated by a PM1_STS event.
1 = SMI# was generated by a PM1_STS event.
7 Reserved
Bit Description
Datasheet 547
LPC Interface Bridge Registers (D31:F0)
13.8.3.10 ALT_GP_SMI_EN—Alternate GPI SMI Enable Register
I/O Address: PMBASE +38h Attribute: R/W
Default Value: 0000h Size: 16-bit
Lockable: No Usage: ACPI or Legacy
Power Well: Resume
6
SWSMI_TMR_STS—R/WC. Software clears this bit by writing a 1 to it.
0 = Software SMI# Timer has Not expired.
1 = Set by the hardware when the Software SMI# Timer expires.
5
APM_STS—R/WC. Software clears this bit by writing a 1 to it.
0 = No SMI# generated by write access to APM Control register with APMCH_EN bit set.
1 = SMI# was generated by a write access to the APM Control register with the
APMC_EN bit set.
4
SLP_SMI_STS—R/WC. Software clears this bit by writing a 1 to the bit location.
0 = No SMI# caused by write of 1 to SLP_EN bit when SLP_SMI_EN bit is also set.
1 = Indicates an SMI# was caused by a write of 1 to SLP_EN bit when SLP_SMI_EN bit
is also set.
3
LEGACY_USB_STS—RO. This bit is a logical OR of each of the SMI status bits in the
USB Legacy Keyboard/Mouse Control Registers ANDed with the corresponding enable
bits. This bit will not be active if the enable bits are not set.
0 = SMI# was not generated by USB Legacy event.
1 = SMI# was generated by USB Legacy event.
2
BIOS_STS—R/WC.
0 = No SMI# generated due to ACPI software requesting attention.
1 = This bit gets set by hardware when a 1 is written by software to the GBL_RLS bit
(D31:F0:PMBase + 04h:bit 2). When both the BIOS_EN bit (D31:F0:PMBase +
30h:bit 2) and the BIOS_STS bit are set, an SMI# will be generated. The
BIOS_STS bit is cleared when software writes a 1 to its bit position.
1:0 Reserved
Bit Description
Bit Description
15:0
Alternate GPI SMI Enable—R/W. These bits are used to enable the corresponding
GPIO to cause an SMI#. For these bits to have any effect, the following must be true.
The corresponding bit in the ALT_GP_SMI_EN register is set.
The corresponding GPI must be routed in the GPI_ROUT register to cause an SMI.
The corresponding GPIO must be implemented.
NOTE: Mapping is as follows: bit 15 corresponds to GPIO15... bit 0 corresponds to
GPIO0.
LPC Interface Bridge Registers (D31:F0)
548 Datasheet
13.8.3.11 ALT_GP_SMI_STS—Alternate GPI SMI Status Register
I/O Address: PMBASE +3Ah Attribute: R/WC
Default Value: 0000h Size: 16-bit
Lockable: No Usage: ACPI or Legacy
Power Well: Resume
13.8.3.12 UPRWC—USB Per-Port Registers Write Control
I/O Address: PMBASE +3Ch Attribute: R/WC, R/W, R/WO
Default Value: 0000h Size: 16-bit
Lockable: No Usage: ACPI or Legacy
Power Well: Resume
Bit Description
15:0
Alternate GPI SMI Status—R/WC. These bits report the status of the corresponding
GPIOs.
0 = Inactive. Software clears this bit by writing a 1 to it.
1 = Active
These bits are sticky. If the following conditions are true, then an SMI# will be
generated and the GPE0_STS bit set:
The corresponding bit in the ALT_GPI_SMI_EN register (PMBASE + 38h) is set
The corresponding GPIO must be routed in the GPI_ROUT register to cause an SMI.
The corresponding GPIO must be implemented.
All bits are in the resume well. Default for these bits is dependent on the state of the
GPIO pins.
Bit Description
15:9 Reserved
8
Write Enable Status—R/WC
0 = This bit gets set by hardware when the “Per-Port Registers Write Enable” bit is
written from 0 to 1
1 = This bit is cleared by software writing a 1b to this bit location
The setting condition takes precedence over the clearing condition in the event that
both occur at once.
When this bit is 1b and bit 0 is 1b, the INTEL_USB2_STS bit is set in the SMI_STS
register.
7:1 Reserved
0
Write Enable SMI Enable—R/WO
0 = Disable
1 = Enables the generation of SMI when the Per-Port Registers Write Enable (bit 1) is
written from 0 to 1. Once written to 1b, this bit can not be cleared by software.
Datasheet 549
LPC Interface Bridge Registers (D31:F0)
13.8.3.13 GPE_CNTL—General Purpose Control Register
I/O Address: PMBASE +42h Attribute: R/W
Default Value: 00h Size: 8-bit
Lockable: No Usage: ACPI or Legacy
Power Well: Resume
Bit Description
8:2 Reserved
2
GPIO27_POL—R/W. This bit controls the polarity of the GPIO27 pin needed to set the
GPIO27_STS bit.
0 = GPIO27 = 0 will set the GPIO27_STS bit.
1 = GPIO27 = 1 will set the GPIO27_STS bit.
1
SWGPE_CTRL—R/W. This bit allows software to control the assertion of SWGPE_STS
bit. This bit is used by hardware as the level input signal for the SWGPE_STS bit in the
GPE0_STS register. When SWGPE_CTRL is 1, SWGPE_STS will be set to 1, and writes to
SWGPE_STS with a value of 1 to clear SWGPE_STS will result in SWGPE_STS being set
back to 1 by hardware. When SWGPE_CTRL is 0, writes to SWGPE_STS with a value of
1 will clear SWGPE_STS to 0.
This bit is cleared to 0 based on a Power Button Override, CPU Thermal Event as well as
by the RSMRST# pin assertion.
0 Reserved
LPC Interface Bridge Registers (D31:F0)
550 Datasheet
13.8.3.14 DEVACT_STS—Device Activity Status Register
I/O Address: PMBASE +44h Attribute: R/WC
Default Value: 0000h Size: 16-bit
Lockable: No Usage: Legacy Only
Power Well: Core
Each bit indicates if an access has occurred to the corresponding device’s trap range, or
for bits 6:9 if the corresponding PCI interrupt is active. This register is used in
conjunction with the Periodic SMI# timer to detect any system activity for legacy power
management. The periodic SMI# timer indicates if it is the right time to read the
DEVACT_STS register (PMBASE + 44h).
Note: Software clears bits that are set in this register by writing a 1 to the bit position.
13.8.3.15 PM2_CNT—Power Management 2 Control Register
I/O Address: PMBASE + 50h
(ACPI PM2_CNT_BLK)Attribute: R/W
Default Value: 00h Size: 8-bit
Lockable: No Usage: ACPI
Power Well: Core
Bit Description
15:13 Reserved
12
KBC_ACT_STS—R/WC. KBC (60/64h).
0 = Indicates that there has been no access to this device I/O range.
1 = This device I/O range has been accessed. Clear this bit by writing a 1 to the bit
location.
11:10 Reserved
9
PIRQDH_ACT_STS—R/WC. PIRQ[D or H].
0 = The corresponding PCI interrupts have not been active.
1 = At least one of the corresponding PCI interrupts has been active. Clear this bit by
writing a 1 to the bit location.
8
PIRQCG_ACT_STS—R/WC. PIRQ[C or G].
0 = The corresponding PCI interrupts have not been active.
1 = At least one of the corresponding PCI interrupts has been active. Clear this bit by
writing a 1 to the bit location.
7
PIRQBF_ACT_STS—R/WC. PIRQ[B or F].
0 = The corresponding PCI interrupts have not been active.
1 = At least one of the corresponding PCI interrupts has been active. Clear this bit by
writing a 1 to the bit location.
6
PIRQAE_ACT_STS—R/WC. PIRQ[A or E].
0 = The corresponding PCI interrupts have not been active.
1 = At least one of the corresponding PCI interrupts has been active. Clear this bit by
writing a 1 to the bit location.
5:0 Reserved
Bit Description
7:1 Reserved
0Arbiter Disable (ARB_DIS)—R/W This bit is a scratchpad bit for legacy software
compatibility.
Datasheet 551
LPC Interface Bridge Registers (D31:F0)
13.9 System Management TCO Registers
The TCO logic is accessed using registers mapped to the PCI configuration space
(Device 31:Function 0) and the system I/O space. For TCO PCI Configuration registers,
see LPC Device 31:Function 0 PCI Configuration registers.
TCO Register I/O Map
The TCO I/O registers reside in a 32-byte range pointed to by a TCOBASE value, which
is, PMBASE + 60h in the PCI config space. The following table shows the mapping of
the registers within that 32-byte range. Each register is described in the following
sections.
13.9.1 TCO_RLD—TCO Timer Reload and Current Value Register
I/O Address: TCOBASE +00h Attribute: R/W
Default Value: 0000h Size: 16-bit
Lockable: No Power Well: Core
Table 13-12. TCO I/O Register Address Map
TCOBASE
+ Offset Mnemonic Register Name Default Type
00h–01h TCO_RLD TCO Timer Reload and Current
Value 0000h R/W
02h TCO_DAT_IN TCO Data In 00h R/W
03h TCO_DAT_OUT TCO Data Out 00h R/W
04h–05h TCO1_STS TCO1 Status 0000h R/WC, RO
06h–07h TCO2_STS TCO2 Status 0000h R/WC
08h–09h TCO1_CNT TCO1 Control 0000h R/W,
R/WLO, R/WC
0Ah–0Bh TCO2_CNT TCO2 Control 0008h R/W
0Ch–0Dh TCO_MESSAGE1,
TCO_MESSAGE2 TCO Message 1 and 2 00h R/W
0Eh TCO_WDCNT Watchdog Control 00h R/W
0Fh Reserved
10h SW_IRQ_GEN Software IRQ Generation 03h R/W
11h Reserved
12h–13h TCO_TMR TCO Timer Initial Value 0004h R/W
14h–1Fh Reserved
Bit Description
15:10 Reserved
9:0 TCO Timer Value—R/W. Reading this register will return the current count of the TCO
timer. Writing any value to this register will reload the timer to prevent the timeout.
LPC Interface Bridge Registers (D31:F0)
552 Datasheet
13.9.2 TCO_DAT_IN—TCO Data In Register
I/O Address: TCOBASE +02h Attribute: R/W
Default Value: 00h Size: 8-bit
Lockable: No Power Well: Core
13.9.3 TCO_DAT_OUT—TCO Data Out Register
I/O Address: TCOBASE +03h Attribute: R/W
Default Value: 00h Size: 8-bit
Lockable: No Power Well: Core
13.9.4 TCO1_STS—TCO1 Status Register
I/O Address: TCOBASE +04h Attribute: R/WC, RO
Default Value: 2000h ‘Size: 16-bit
Lockable: No Power Well: Core
(Except bit 7, in RTC)
Bit Description
7:0
TCO Data In Value—R/W. This data register field is used for passing commands from
the OS to the SMI handler. Writes to this register will cause an SMI and set the
SW_TCO_SMI bit in the TCO1_STS register (D31:F0:04h).
Bit Description
7:0
TCO Data Out Value—R/W. This data register field is used for passing commands from
the SMI handler to the OS. Writes to this register will set the TCO_INT_STS bit in the
TCO_STS1 register. It will also cause an interrupt, as selected by the TCO_INT_SEL
bits.
Bit Description
15:14 Reserved
13
TCO_SLVSEL (TCO Slave Select)—RO. This register bit is Read Only by Host and
indicates the value of TCO Slave Select Soft Strap. See the PCH Soft Straps section of
the SPI Chapter for details.
12
DMISERR_STS—R/WC.
0 = Software clears this bit by writing a 1 to it.
1 = PCH received a DMI special cycle message using DMI indicating that it wants to
cause an SERR#. The software must read the Processor to determine the reason
for the SERR#.
11 Reserved
10
DMISMI_STS—R/WC.
0 = Software clears this bit by writing a 1 to it.
1 = PCH received a DMI special cycle message using DMI indicating that it wants to
cause an SMI. The software must read the Processor to determine the reason for
the SMI.
9
DMISCI_STS—R/WC.
0 = Software clears this bit by writing a 1 to it.
1 = PCH received a DMI special cycle message using DMI indicating that it wants to
cause an SCI. The software must read the Processor to determine the reason for
the SCI.
Datasheet 553
LPC Interface Bridge Registers (D31:F0)
8
BIOSWR_STS—R/WC.
0 = Software clears this bit by writing a 1 to it.
1 = PCH sets this bit and generates and SMI# to indicate an invalid attempt to write to
the BIOS. This occurs when either:
a) The BIOSWP bit is changed from 0 to 1 and the BLD bit is also set, or
b) any write is attempted to the BIOS and the BIOSWP bit is also set.
NOTE: On write cycles attempted to the 4 MB lower alias to the BIOS space, the
BIOSWR_STS will not be set.
7
NEWCENTURY_STS—R/WC. This bit is in the RTC well.
0 = Cleared by writing a 1 to the bit position or by RTCRST# going active.
1 = This bit is set when the Year byte (RTC I/O space, index offset 09h) rolls over from
99 to 00. Setting this bit will cause an SMI# (but not a wake event).
NOTE: The NEWCENTURY_STS bit is not valid when the RTC battery is first installed (or
when RTC power has not been maintained). Software can determine if RTC
power has not been maintained by checking the RTC_PWR_STS bit
(D31:F0:A4h, bit 2), or by other means (such as a checksum on RTC RAM). If
RTC power is determined to have not been maintained, BIOS should set the
time to a valid value and then clear the NEWCENTURY_STS bit.
The NEWCENTURY_STS bit may take up to 3 RTC clocks for the bit to be cleared after a
1 is written to the bit to clear it. After writing a 1 to this bit, software should not exit the
SMI handler until verifying that the bit has actually been cleared. This will ensure that
the SMI is not re-entered.
6:4 Reserved
3
TIMEOUT—R/WC.
0 = Software clears this bit by writing a 1 to it.
1 = Set by PCH to indicate that the SMI was caused by the TCO timer reaching 0.
2
TCO_INT_STS—R/WC.
0 = Software clears this bit by writing a 1 to it.
1 = SMI handler caused the interrupt by writing to the TCO_DAT_OUT register
(TCOBASE + 03h).
1
SW_TCO_SMI—R/WC.
0 = Software clears this bit by writing a 1 to it.
1 = Software caused an SMI# by writing to the TCO_DAT_IN register (TCOBASE +
02h).
0
NMI2SMI_STS—RO.
0 = Cleared by clearing the associated NMI status bit.
1 = Set by the PCH when an SMI# occurs because an event occurred that would
otherwise have caused an NMI (because NMI2SMI_EN is set).
Bit Description
LPC Interface Bridge Registers (D31:F0)
554 Datasheet
13.9.5 TCO2_STS—TCO2 Status Register
I/O Address: TCOBASE +06h Attribute: R/WC
Default Value: 0000h Size: 16-bit
Lockable: No Power Well: Resume
(Except Bit 0, in RTC)
Bit Description
15:5 Reserved
4
SMLink Slave SMI Status (SMLINK_SLV_SMI_STS)—R/WC. Allow the software to
go directly into a pre-determined sleep state. This avoids race conditions. Software
clears this bit by writing a 1 to it.
0 = The bit is reset by RSMRST#, but not due to the PCI Reset associated with exit
from S3–S5 states.
1 = PCH sets this bit to 1 when it receives the SMI message on the SMLink Slave
Interface.
3Reserved
2
BOOT_STS—R/WC.
0 = Cleared by PCH based on RSMRST# or by software writing a 1 to this bit. Note that
software should first clear the SECOND_TO_STS bit before writing a 1 to clear the
BOOT_STS bit.
1 = Set to 1 when the SECOND_TO_STS bit goes from 0 to 1 and the processor has not
fetched the first instruction.
If rebooting due to a second TCO timer timeout, and if the BOOT_STS bit is set, the
PCH will reboot using the ‘safe’ multiplier (1111). This allows the system to recover
from a processor frequency multiplier that is too high, and allows the BIOS to check the
BOOT_STS bit at boot. If the bit is set and the frequency multiplier is 1111, then the
BIOS knows that the processor has been programmed to an invalid multiplier.
1
SECOND_TO_STS—R/WC.
0 = Software clears this bit by writing a 1 to it, or by a RSMRST#.
1 = PCH sets this bit to 1 to indicate that the TIMEOUT bit had been (or is currently) set
and a second timeout occurred before the TCO_RLD register was written. If this bit
is set and the NO_REBOOT config bit is 0, then the PCH will reboot the system after
the second timeout. The reboot is done by asserting PLTRST#.
0
Intruder Detect (INTRD_DET)—R/WC.
0 = Software clears this bit by writing a 1 to it, or by RTCRST# assertion.
1 = Set by PCH to indicate that an intrusion was detected. This bit is set even if the
system is in G3 state.
NOTES:
1. This bit has a recovery time. After writing a 1 to this bit position (to clear it), the bit
may be read back as a 1 for up 65 microseconds before it is read as a 0. Software
must be aware of this recovery time when reading this bit after clearing it.
2. If the INTRUDER# signal is active when the software attempts to clear the
INTRD_DET bit, the bit will remain as a 1, and the SMI# will be generated again
immediately. The SMI handler can clear the INTRD_SEL bits (TCOBASE + 0Ah, bits
2:1), to avoid further SMIs. However, if the INTRUDER# signals goes inactive and
then active again, there will not be further SMI’s (because the INTRD_SEL bits
would select that no SMI# be generated).
3. If the INTRUDER# signal goes inactive some point after the INTRD_DET bit is
written as a 1, then the INTRD_DET signal will go to a 0 when INTRUDER# input
signal goes inactive. Note that this is slightly different than a classic sticky bit, since
most sticky bits would remain active indefinitely when the signal goes active and
would immediately go inactive when a 1 is written to the bit
Datasheet 555
LPC Interface Bridge Registers (D31:F0)
13.9.6 TCO1_CNT—TCO1 Control Register
I/O Address: TCOBASE +08h Attribute: R/W, R/WLO, R/WC
Default Value: 0000h Size: 16-bit
Lockable: No Power Well: Core
Bit Description
15:13 Reserved
12
TCO_LOCK—R/WLO. When set to 1, this bit prevents writes from changing the TCO_EN
bit (in offset 30h of Power Management I/O space). Once this bit is set to 1, it can not
be cleared by software writing a 0 to this bit location. A core-well reset is required to
change this bit from 1 to 0. This bit defaults to 0.
11
TCO Timer Halt (TCO_TMR_HLT)—R/W.
0 = The TCO Timer is enabled to count.
1 = The TCO Timer will halt. It will not count, and thus cannot reach a value that will
cause an SMI# or set the SECOND_TO_STS bit. When set, this bit will prevent
rebooting and prevent Alert On LAN event messages from being transmitted on the
SMLink (but not Alert On LAN* heartbeat messages).
10 Reserved
9
NMI2SMI_EN—R/W.
0 = Normal NMI functionality.
1 = Forces all NMIs to instead cause SMIs. The functionality of this bit is dependent
upon the settings of the NMI_EN bit and the GBL_SMI_EN bit as detailed in the
following table:
8
NMI_NOW—R/WC.
0 = Software clears this bit by writing a 1 to it. The NMI handler is expected to clear
this bit. Another NMI will not be generated until the bit is cleared.
1 = Writing a 1 to this bit causes an NMI. This allows the BIOS or SMI handler to force
an entry to the NMI handler.
7:0 Reserved
0b 0b No SMI# at all because GBL_SMI_EN = 0
0b 1b SMI# will be caused due to NMI events
1b 0b No SMI# at all because GBL_SMI_EN = 0
1b 1b No SMI# due to NMI because NMI_EN = 1
LPC Interface Bridge Registers (D31:F0)
556 Datasheet
13.9.7 TCO2_CNT—TCO2 Control Register
I/O Address: TCOBASE +0Ah Attribute: R/W
Default Value: 0008h Size: 16-bit
Lockable: No Power Well: Resume
13.9.8 TCO_MESSAGE1 and TCO_MESSAGE2 Registers
I/O Address: TCOBASE +0Ch (Message 1)Attribute: R/W
TCOBASE +0Dh (Message 2)
Default Value: 00h Size: 8-bit
Lockable: No Power Well: Resume
Bit Description
15:6 Reserved
5:4
OS_POLICY—R/W. OS-based software writes to these bits to select the policy that the
BIOS will use after the platform resets due the WDT. The following convention is
recommended for the BIOS and OS:
00 = Boot normally
01 = Shut down
10 = Do not load OS. Hold in pre-boot state and use LAN to determine next step
11 = Reserved
NOTE: These are just scratchpad bits. They should not be reset when the TCO logic
resets the platform due to Watchdog Timer.
3
GPIO11_ALERT_DISABLE—R/W. At reset (using RSMRST# asserted) this bit is set
and GPIO[11] alerts are disabled.
0 = Enable.
1 = Disable GPIO11/SMBALERT# as an alert source for the heartbeats and the SMBus
slave.
2:1
INTRD_SEL—R/W. This field selects the action to take if the INTRUDER# signal goes
active.
00 = No interrupt or SMI#
01 = Interrupt (as selected by TCO_INT_SEL).
10 = SMI
11 = Reserved
0Reserved
Bit Description
7:0
TCO_MESSAGE[n]—R/W. BIOS can write into these registers to indicate its boot
progress. The external microcontroller can read these registers to monitor the boot
progress.
Datasheet 557
LPC Interface Bridge Registers (D31:F0)
13.9.9 TCO_WDCNT—TCO Watchdog Control Register
Offset Address: TCOBASE + 0Eh Attribute: R/W
Default Value: 00h Size: 8 bits
Power Well: Resume
13.9.10 SW_IRQ_GEN—Software IRQ Generation Register
Offset Address: TCOBASE + 10h Attribute: R/W
Default Value: 03h Size: 8 bits
Power Well: Core
13.9.11 TCO_TMR—TCO Timer Initial Value Register
I/O Address: TCOBASE +12h Attribute: R/W
Default Value: 0004h Size: 16-bit
Lockable: No Power Well: Core
Bit Description
7:0
The BIOS or system management software can write into this register to indicate more
details on the boot progress. The register will reset to 00h based on a RSMRST# (but
not PLTRST#). The external microcontroller can read this register to monitor boot
progress.
Bit Description
7:2 Reserved
1IRQ12_CAUSE—R/W. When software sets this bit to 1, IRQ12 will be asserted. When
software sets this bit to 0, IRQ12 will be de-asserted.
0IRQ1_CAUSE—R/W. When software sets this bit to 1, IRQ1 will be asserted. When
software sets this bit to 0, IRQ1 will be de-asserted.
Bit Description
15:10 Reserved
9:0
TCO Timer Initial Value—R/W. Value that is loaded into the timer each time the
TCO_RLD register is written. Values of 0000h or 0001h will be ignored and should not
be attempted. The timer is clocked at approximately 0.6 seconds, and thus allows
timeouts ranging from 1.2 second to 613.8 seconds.
NOTE: The timer has an error of ±1 tick (0.6 S).
The TCO Timer will only count down in the S0 state.
LPC Interface Bridge Registers (D31:F0)
558 Datasheet
13.10 General Purpose I/O Registers
The control for the general purpose I/O signals is handled through a 128-byte I/O
space. The base offset for this space is selected by the GPIOBASE register.
Table 13-13. Registers to Control GPIO Address Map
GPIOBASE
+ Offset Mnemonic Register Name Default Access
00h–03h GPIO_USE_SEL GPIO Use Select F96BA1FF R/W
04h–07h GP_IO_SEL GPIO Input/Output Select F6FF6EFFh R/W
08h–0Bh Reserved 0h
0Ch–0Fh GP_LVL GPIO Level for Input or
Output 02FE0100h R/W
10h–13h Reserved 0h
14h–17h Reserved 0h
18h–1Bh GPO_BLINK GPIO Blink Enable 00040000h R/W
1Ch–1Fh GP_SER_BLINK GP Serial Blink 00000000h R/W
20–23h GP_SB_CMDSTS GP Serial Blink Command
Status 00080000h R/W
24–27h GP_SB_DATA GP Serial Blink Data 00000000h R/W
28–29h GPI_NMI_EN GPI NMI Enable 0000 R/W
2A–2Bh GPI_NMI_STS GPI NMI Status 0000 R/WC
2C–2Fh GPI_INV GPIO Signal Invert 00000000h R/W
30h–33h GPIO_USE_SEL2 GPIO Use Select 2
020300FEh
(mobile
only) /
020300FFh
(Desktop
only)
R/W
34h–37h GP_IO_SEL2 GPIO Input/Output Select 2 1F57FFF4h R/W
38h–3Bh GP_LVL2 GPIO Level for Input or
Output 2 A4AA0003h R/W
3Ch–3Fh Reserved 0h
40h–43h GPIO_USE_SEL3 GPIO Use Select 3
00000000h
(mobile
only)/
00000100h
(desktop
only)
R/W
44h–47h GPIO_SEL3 GPIO Input/Output Select 3 00000F00h R/W
48h–4Bh GP_LVL3 GPIO Level for Input or
Output 3 00000000h R/W
4Ch–5Fh — Reserved 0h
60h–63h GP_RST_SEL[31:0] GPIO Reset Select 1 01000000h R/W
64h–67h GP_RST_SEL[63:32] GPIO Reset Select 2 0h R/W
68h–6Bh GP_RST_SEL[95:64] GPIO Reset Select 3 0h R/W
6Ch–7Fh — Reserved 0h
Datasheet 559
LPC Interface Bridge Registers (D31:F0)
13.10.1 GPIO_USE_SEL—GPIO Use Select Register
Offset Address: GPIOBASE + 00h Attribute: R/W
Default Value: F96BA1FFh Size: 32-bit
Lockable: Yes Power Well: Core for 0:7, 16:23,
Resume for 8:15, 24:3
13.10.2 GP_IO_SEL—GPIO Input/Output Select Register
Offset Address: GPIOBASE +04h Attribute: R/W
Default Value: F6FF6EFFh Size: 32-bit
Lockable: Yes Power Well: Core for 0:7, 16:23,
Resume for 8:15, 24:31
Bit Description
31:0
GPIO_USE_SEL[31:0]—R/W. Each bit in this register enables the corresponding GPIO
(if it exists) to be used as a GPIO, rather than for the native function.
0 = Signal used as native function.
1 = Signal used as a GPIO.
NOTES:
1. The following bits are always 1 because they are always unMultiplexed: 0, 8, 15,
24, 27, and 28.
2. If GPIO[n] does not exist, then, the n-bit in this register will always read as 0
and writes will have no effect. The following bits are always 0 in mobile: 15 and
25.
3. After a full reset (RSMRST#) all multiplexed signals in the resume and core
wells are configured as their default function. After only a PLTRST#, the GPIOs
in the core well are configured as their default function.
4. When configured to GPIO mode, the muxing logic will present the inactive state
to native logic that uses the pin as an input.
5. All GPIOs are reset to the default state by CF9h reset except GPIO24.
6. Bit 26 may be overridden by bit 8 in the GEN_PMCON_3 Register.
7. Bit 29 must only be used to configure SLP_LAN# behavior in Sx/Moff when ME
FW is not configuring the pin as SLP_LAN#. GPIO29 can not be used for any
other usage.
Bit Description
31:0
GP_IO_SEL[31:0]—R/W.
When configured in native mode (GPIO_USE_SEL[n] is 0), writes to these bits have
no effect. The value reported in this register is undefined when programmed as
native mode.
0 = Output. The corresponding GPIO signal is an output.
1 = Input. The corresponding GPIO signal is an input.
NOTE: GPIO29 can not be configured as an input, must be used as an output in Sx/
Moff to configure SLP_LAN#.
LPC Interface Bridge Registers (D31:F0)
560 Datasheet
13.10.3 GP_LVL—GPIO Level for Input or Output Register
Offset Address: GPIOBASE +0Ch Attribute: R/W
Default Value: 02FE0100h Size: 32-bit
Lockable: Yes Power Well: Core for 0:7, 16:23,
Resume for 8:15, 24:31
13.10.4 GPO_BLINK—GPO Blink Enable Register
Offset Address: GPIOBASE +18h Attribute: R/W
Default Value: 00040000h Size: 32-bit
Lockable: No Power Well: Core for 0:7, 16:23,
Resume for 8:15, 24:31
NOTE: GPIO18 will blink by default immediately after reset. This signal could be connected to an
LED to indicate a failed boot (by programming BIOS to clear GP_BLINK18 after successful
POST).
Bit Description
31:0
GP_LVL[31:0]—R/W. These registers are implemented as dual read/write with
dedicated storage each. Write value will be stored in the write register, while read is
coming from the read register which will always reflect the value of the pin.
If GPIO[n] is programmed to be an output (using the corresponding bit in the
GP_IO_SEL register), then the corresponding GP_LVL[n] write register value will
drive a high or low value on the output pin. 1 = high, 0 = low.
When configured in native mode (GPIO_USE_SEL[n] is 0), writes to these bits are
stored but have no effect to the pin value. The value reported in this register is
undefined when programmed as native mode.
NOTE: Bit 29 setting will be ignored if ME FW is configuring SLP_LAN# behavior.
Bit Description
31:0
GP_BLINK[31:0]—R/W. The setting of this bit has no effect if the corresponding
GPIO signal is programmed as an input.
0 = The corresponding GPIO will function normally.
1 = If the corresponding GPIO is programmed as an output, the output signal will
blink at a rate of approximately once per second. The high and low times have
approximately 0.5 seconds each. The GP_LVL bit is not altered when this bit is
set.
The value of the corresponding GP_LVL bit remains unchanged during the blink
process, and does not effect the blink in any way. The GP_LVL bit is not altered
when programmed to blink. It will remain at its previous value.
These bits correspond to GPIO in the Resume well. These bits revert to the default
value based on RSMRST# or a write to the CF9h register (but not just on
PLTRST#).
Datasheet 561
LPC Interface Bridge Registers (D31:F0)
13.10.5 GP_SER_BLINK—GP Serial Blink Register
Offset Address: GPIOBASE +1Ch Attribute: R/W
Default Value: 00000000h Size: 32-bit
Lockable: No Power Well: Core for 0:7, 16:23,
Resume for 8:15, 24:31
Bit Description
31:0
GP_SER_BLINK[31:0]—R/W. The setting of this bit has no effect if the
corresponding GPIO is programmed as an input or if the corresponding GPIO has the
GPO_BLINK bit set.
When set to a 0, the corresponding GPIO will function normally.
When using serial blink, this bit should be set to a 1 while the corresponding
GP_IO_SEL bit is set to 1. Setting the GP_IO_SEL bit to 0 after the GP_SER_BLINK bit
ensures PCH will not drive a 1 on the pin as an output. When this corresponding bit is
set to a 1 and the pin is configured to output mode, the serial blink capability is
enabled. The PCH will serialize messages through an open-drain buffer configuration.
The value of the corresponding GP_LVL bit remains unchanged and does not impact
the serial blink capability in any way.
Writes to this register have no effect when the corresponding pin is configured in
native mode and the read value returned is undefined.
LPC Interface Bridge Registers (D31:F0)
562 Datasheet
13.10.6 GP_SB_CMDSTS—GP Serial Blink Command
Status Register
Offset Address: GPIOBASE +20h Attribute: R/W, RO
Default Value: 00080000h Size: 32-bit
Lockable: No Power Well: Core
13.10.7 GP_SB_DATA—GP Serial Blink Data Register
Offset Address: GPIOBASE +24h Attribute: R/W
Default Value: 00000000h Size: 32-bit
Lockable: No Power Well: Core
Bit Description
31:24 Reserved
23:22
Data Length Select (DLS)—R/W. This field determines the number of bytes to
serialize on GPIO
00 = Serialize bits 7:0 of GP_SB_DATA (1 byte)
01 = Serialize bits 15:0 of GP_SB_DATA (2 bytes)
10 = Undefined - Software must not write this value
11 = Serialize bits 31:0 of GP_SB_DATA (4 bytes)
Software should not modify the value in this register unless the Busy bit is clear. Writes
to this register have no effect when the corresponding pin is configured in native mode
and the read value returned is undefined.
21:16
Data Rate Select (DRS)—R/W. This field selects the number of 120ns time intervals
to count between Manchester data transitions. The default of 8h results in a 960 ns
minimum time between transitions. A value of 0h in this register produces undefined
behavior.
Software should not modify the value in this register unless the Busy bit is clear.
15:9 Reserved
8
Busy—RO. This read-only status bit is the hardware indication that a serialization is in
progress. Hardware sets this bit to 1 based on the Go bit being set. Hardware clears
this bit when the Go bit is cleared by the hardware.
7:1 Reserved
0
Go—R/W. This bit is set to 1 by software to start the serialization process. Hardware
clears the bit after the serialized data is sent. Writes of 0 to this register have no effect.
Software should not write this bit to 1 unless the Busy status bit is cleared.
Bit Description
31:0
GP_SB_DATA[31:0]—R/W. This register contains the data serialized out. The
number of bits shifted out are selected through the DLS field in the GP_SB_CMDSTS
register. This register should not be modified by software when the Busy bit is set.
Datasheet 563
LPC Interface Bridge Registers (D31:F0)
13.10.8 GPI_NMI_EN—GPI NMI Enable Register
Offset Address: GPIOBASE +28h Attribute: R/W
Default Value: 00000h Size: 16-bit
Lockable: No Power Well: Core for 0:7
Resume for 8:15
13.10.9 GPI_NMI_STS—GPI NMI Status Register
Offset Address: GPIOBASE +2Ah Attribute: R/WC
Default Value: 00000h Size: 16-bit
Lockable: Yes Power Well: Core for 0:7
Resume for 8:15
13.10.10 GPI_INV—GPIO Signal Invert Register
Offset Address: GPIOBASE +2Ch Attribute: R/W
Default Value: 00000000h Size: 32-bit
Lockable: No Power Well: Core for 17, 16, 7:0
Bit Description
15:0
GPI_NMI_EN[15:0]. GPI NMI Enable: This bit only has effect if the
corresponding GPIO is used as an input and its GPI_ROUT register is being
programmed to NMI functionality. When set to 1, it used to allow active-low and
active-high inputs (depends on inversion bit) to cause NMI.
Bit Description
15:0
GPI_NMI_STS[15:0]. GPI NMI Status: GPI_NMI_STS[15:0]. GPI NMI Status:
This bit is set if the corresponding GPIO is used as an input, and its GPI_ROUT
register is being programmed to NMI functionality and also GPI_NMI_EN bit is set
when it detects either:
1) active-high edge when its corresponding GPI_INV is configured with value 0.
2) active-low edge when its corresponding GPI_INV is configured with value 1.
NOTE: Writing value of 1 will clear the bit, while writing value of 0 have no effect.
Bit Description
31:16 Reserved
15:0
Input Inversion (GP_INV[n])—R/W. This bit only has effect if the corresponding
GPIO is used as an input and used by the GPE logic, where the polarity matters. When
set to ‘1’, then the GPI is inverted as it is sent to the GPE logic that is using it. This bit
has no effect on the value that is reported in the GP_LVL register.
These bits are used to allow both active-low and active-high inputs to cause SMI# or
SCI. Note that in the S0 or S1 state, the input signal must be active for at least two PCI
clocks to ensure detection by the PCH. In the S3, S4 or S5 states the input signal must
be active for at least 2 RTC clocks to ensure detection. The setting of these bits has no
effect if the corresponding GPIO is programmed as an output. These bits correspond to
GPI that are in the resume well, and will be reset to their default values by RSMRST# or
by a write to the CF9h register.
0 = The corresponding GPI_STS bit is set when the PCH detects the state of the input
pin to be high.
1 = The corresponding GPI_STS bit is set when the PCH detects the state of the input
pin to be low.
LPC Interface Bridge Registers (D31:F0)
564 Datasheet
13.10.11 GPIO_USE_SEL2—GPIO Use Select 2 Register
Offset Address: GPIOBASE +30h Attribute: R/W
Default Value: 020300FFh (Desktop) Size: 32-bit
020300FEh (Mobile)
Lockable: Yes Power Well: Core for 0:7, 16:23,
Resume for 8:15, 24:31
13.10.12 GP_IO_SEL2—GPIO Input/Output Select 2 Register
Offset Address: GPIOBASE +34h Attribute: R/W
Default Value: 1F57FFF4h
Lockable: Yes Power Well: Core for 0:7, 16:23,
Resume for 8:15, 24:31
Bit Description
31:0
GPIO_USE_SEL2[63:32]—R/W. Each bit in this register enables the corresponding
GPIO (if it exists) to be used as a GPIO, rather than for the native function.
0 = Signal used as native function.
1 = Signal used as a GPIO.
NOTES:
1. The following bit are always 1 because it is always unMultiplexed: 3, 25. The
following bits are unMultiplexed in desktop and are also 1: 0.
2. If GPIO[n] does not exist, then, the (n-32) bit in this register will always read as
0 and writes will have no effect. The following bits are always 0: 29, 30 and 31.
The following bit is also not used in mobile and is always 0: 0.
3. After a full reset RSMRST# all multiplexed signals in the resume and core wells
are configured as their default function. After only a PLTRST#, the GPIOs in the
core well are configured as their default function.
4. When configured to GPIO mode, the muxing logic will present the inactive state
to native logic that uses the pin as an input.
5. Bit 26 is ignored, functionality is configured by bits 9:8 of FLMAP0 register.
This register corresponds to GPIO[63:32]. Bit 0 corresponds to GPIO32 and bit 28
corresponds to GPIO60.
Bit Description
31:0
GP_IO_SEL2[63:32]R/W.
0 = GPIO signal is programmed as an output.
1 = Corresponding GPIO signal (if enabled in the GPIO_USE_SEL2 register) is
programmed as an input.
This register corresponds to GPIO[63:32]. Bit 0 corresponds to GPIO32.
Datasheet 565
LPC Interface Bridge Registers (D31:F0)
13.10.13 GP_LVL2—GPIO Level for Input or Output 2 Register
Offset Address: GPIOBASE +38h Attribute: R/W
Default Value: A4AA0003h Size: 32-bit
Lockable: Yes Power Well: Core for 0:7, 16:23,
Resume for 8:15, 24:31
Bit Description
31:0
GP_LVL[63:32]—R/W.
These registers are implemented as dual read/write with dedicated storage each. Write
value will be stored in the write register, while read is coming from the read register
which will always reflect the value of the pin. If GPIO[n] is programmed to be an output
(using the corresponding bit in the GP_IO_SEL register), then the corresponding
GP_LVL[n] write register value will drive a high or low value on the output pin.
1 = high, 0 = low.
When configured in native mode (GPIO_USE_SEL[n] is 0), writes to these bits are
stored but have no effect to the pin value. The value reported in this register is
undefined when programmed as native mode.
NOTE: This register corresponds to GPIO[63:32]. Bit 0 corresponds to GPIO32.
LPC Interface Bridge Registers (D31:F0)
566 Datasheet
13.10.14 GPIO_USE_SEL3—GPIO Use Select 3 Register
Offset Address: GPIOBASE +40h Attribute: R/W
Default Value: 00000100h (Desktop) Size: 32-bit
00000000h (Mobile)
Lockable: Yes Power Well: Core for 0:7, 16:23,
Resume for 8:15, 24:31
Bit Description
31:9 Always 0. No corresponding GPIO.
11:8
GPIO_USE_SEL3[75:72]—R/W. Each bit in this register enables the corresponding
GPIO (if it exists) to be used as a GPIO, rather than for the native function.
0 = Signal used as native function.
1 = Signal used as a GPIO.
NOTES:
1. The following bit is always 1 because it is always unMultiplexed: 8
2. If GPIO[n] does not exist, then, the (n-32) bit in this register will always read as
0 and writes will have no effect.
3. After a full reset RSMRST# all multiplexed signals in the resume and core wells
are configured as their default function. After only a PLTRST#, the GPIOs in the
core well are configured as their default function.
4. When configured to GPIO mode, the muxing logic will present the inactive state
to native logic that uses the pin as an input.
This register corresponds to GPIO[95:64]. Bit 0 corresponds to GPIO64 and bit 32
corresponds to GPIO95.
7:4 Always 0. No corresponding GPIO.
3:0
GPIO_USE_SEL3[67:64]—R/W. Each bit in this register enables the corresponding
GPIO (if it exists) to be used as a GPIO, rather than for the native function.
0 = Signal used as native function.
1 = Signal used as a GPIO.
NOTES:
1. If GPIO[n] does not exist, then, the (n-32) bit in this register will always read as
0 and writes will have no effect.
2. After a full reset RSMRST# all multiplexed signals in the resume and core wells
are configured as their default function. After only a PLTRST#, the GPIOs in the
core well are configured as their default function.
3. When configured to GPIO mode, the muxing logic will present the inactive state
to native logic that uses the pin as an input.
This register corresponds to GPIO[95:64]. Bit 0 corresponds to GPIO64 and bit 32
corresponds to GPIO95.
Datasheet 567
LPC Interface Bridge Registers (D31:F0)
13.10.15 GP_IO_SEL3—GPIO Input/Output Select 3 Register
Offset Address: GPIOBASE +44h Attribute: R/W
Default Value: 00000F00 Size: 32-bit
Lockable: Yes Power Well: Core for 0:7, 16:23,
Resume for 8:15, 24:31
Bit Description
31:12 Always 0. No corresponding GPIO.
11:8
GPIO_IO_SEL3[75:72]—R/W.
0 = GPIO signal is programmed as an output.
1 = Corresponding GPIO signal (if enabled in the GPIO_USE_SEL3 register) is
programmed as an input.
This register corresponds to GPIO[95:64]. Bit 0 corresponds to GPIO64.
7:4 Always 0. No corresponding GPIO.
3:0
GPIO_IO_SEL3[67:64]—R/W.
0 = GPIO signal is programmed as an output.
1 = Corresponding GPIO signal (if enabled in the GPIO_USE_SEL3 register) is
programmed as an input.
This register corresponds to GPIO[95:64]. Bit 0 corresponds to GPIO64.
LPC Interface Bridge Registers (D31:F0)
568 Datasheet
13.10.16 GP_LVL3—GPIO Level for Input or Output 3 Register
Offset Address: GPIOBASE +48h Attribute: R/W
Default Value: 00000000h Size: 32-bit
Lockable: Yes Power Well: Core for 0:7, 16:23,
Resume for 8:15, 24:31
Bit Description
31:12 Always 0. No corresponding GPIO.
11:8
GP_LVL[75:72]—R/W.
These registers are implemented as dual read/write with dedicated storage each. Write
value will be stored in the write register, while read is coming from the read register
which will always reflect the value of the pin. If GPIO[n] is programmed to be an output
(using the corresponding bit in the GP_IO_SEL register), then the corresponding
GP_LVL[n] write register value will drive a high or low value on the output pin. 1 =
high, 0 = low.
When configured in native mode (GPIO_USE_SEL[n] is 0), writes to these bits are
stored but have no effect to the pin value. The value reported in this register is
undefined when programmed as native mode.
This register corresponds to GPIO[95:64]. Bit 0 corresponds to GPIO64.
7:4 Always 0. No corresponding GPIO.
3:0
GP_LVL[67:64]—R/W.
These registers are implemented as dual read/write with dedicated storage each. Write
value will be stored in the write register, while read is coming from the read register
which will always reflect the value of the pin. If GPIO[n] is programmed to be an output
(using the corresponding bit in the GP_IO_SEL register), then the corresponding
GP_LVL[n] write register value will drive a high or low value on the output pin.
1 = high, 0 = low.
When configured in native mode (GPIO_USE_SEL[n] is 0), writes to these bits are
stored but have no effect to the pin value. The value reported in this register is
undefined when programmed as native mode.
This register corresponds to GPIO[95:64]. Bit 0 corresponds to GPIO64.
Datasheet 569
LPC Interface Bridge Registers (D31:F0)
13.10.17 GP_RST_SEL1—GPIO Reset Select Register
Offset Address: GPIOBASE +60h Attribute: R/W
Default Value: 01000000h Size: 32-bit
Lockable: Yes Power Well: Core for 0:7, 16:23,
Resume for 8:15, 24:31
13.10.18 GP_RST_SEL2—GPIO Reset Select Register
Offset Address: GPIOBASE +64h Attribute: R/W
Default Value: 00000000h Size: 32-bit
Lockable: Yes Power Well: Core for 0:7, 16:23,
Resume for 8:15, 24:31
Bit Description
31:24
GP_RST_SEL[31:24]—R/W.
0 = Corresponding GPIO registers will be reset by host partition reset, global resets,
and straight-to-S5 events such as THRMTRIP# or Power Button Override.
1 = Corresponding GPIO registers will be reset by RSMRST# assertion only.
NOTE: GPIO[24] register bits are not cleared by CF9h reset by default.
NOTE: For a list of causes of host partition and global resets, see Tab le 5 - 35 .
23:16 Reserved
15:8
GP_RST_SEL[15:8]—R/W.
0 = Corresponding GPIO registers will be reset by host partition reset, global resets,
and straight-to-S5 events such as THRMTRIP# or Power Button Override.
1 = Corresponding GPIO registers will be reset by RSMRST# assertion only.
NOTE: For a list of causes of host partition and global resets, see Tabl e 5-3 5 .
7:0 Reserved
Bit Description
31:24
GP_RST_SEL[63:56]—R/W.
0 = Corresponding GPIO registers will be reset by host partition reset, global resets,
and straight-to-S5 events such as THRMTRIP# or Power Button Override.
1 = Corresponding GPIO registers will be reset by RSMRST# assertion only.
NOTE: For a list of causes of host partition and global resets, see Tab le 5 - 35 .
23:16 Reserved
15:8
GP_RST_SEL[47:40]—R/W.
0 = Corresponding GPIO registers will be reset by host partition reset, global resets,
and straight-to-S5 events such as THRMTRIP# or Power Button Override.
1 = Corresponding GPIO registers will be reset by RSMRST# assertion only.
NOTE: For a list of causes of host partition and global resets, see Tab le 5 - 35 .
7:0 Reserved
LPC Interface Bridge Registers (D31:F0)
570 Datasheet
13.10.19 GP_RST_SEL3—GPIO Reset Select Register
Offset Address: GPIOBASE +68h Attribute: R/W
Default Value: 00000000h Size: 32-bit
Lockable: Yes Power Well: Core for 0:7, 16:23,
Resume for 8:15, 24:31
§ §
Bit Description
31:12 Reserved
11:8
GP_RST_SEL[75:72]—R/W.
0 = Corresponding GPIO registers will be reset by host partition reset, global resets,
and straight-to-S5 events such as THRMTRIP# or Power Button Override.
1 = Corresponding GPIO registers will be reset by RSMRST# assertion only.
NOTE: For a list of causes of host partition and global resets, see Table 5-35.
7:0 Reserved
Datasheet 571
SATA Controller Registers (D31:F2)
14 SATA Controller Registers
(D31:F2)
14.1 PCI Configuration Registers (SATA–D31:F2)
Note: Address locations that are not shown should be treated as Reserved.
All of the SATA registers are in the core well. None of the registers can be locked.
Table 14-1. SATA Controller PCI Register Address Map (SATA–D31:F2) (Sheet 1 of 2)
Offset Mnemonic Register Name Default Type
00h–01h VID Vendor Identification 8086h RO
02h–03h DID Device Identification See register
description RO
04h–05h PCICMD PCI Command 0000h R/W, RO
06h–07h PCISTS PCI Status 02B0h R/WC, RO
08h RID Revision Identification See register
description RO
09h PI Programming Interface See register
description
See
register
description
0Ah SCC Sub Class Code See register
description
See
register
description
0Bh BCC Base Class Code 01h RO
0Dh PMLT Primary Master Latency Timer 00h RO
0Eh HTYPE Header Type 00h RO
10h–13h PCMD_BAR Primary Command Block Base Address 00000001h R/W, RO
14h–17h PCNL_BAR Primary Control Block Base Address 00000001h R/W, RO
18h–1Bh SCMD_BAR Secondary Command Block Base
Address 00000001h R/W, RO
1Ch–1Fh SCNL_BAR Secondary Control Block Base Address 00000001h R/W, RO
20h–23h BAR Legacy Bus Master Base Address 00000001h R/W, RO
24h–27h ABAR /
SIDPBA
AHCI Base Address / SATA Index Data
Pair Base Address
See register
description
See
register
description
2Ch–2Dh SVID Subsystem Vendor Identification 0000h R/WO
2Eh–2Fh SID Subsystem Identification 0000h R/WO
34h CAP Capabilities Pointer 80h RO
3Ch INT_LN Interrupt Line 00h R/W
3Dh INT_PN Interrupt Pin See register
description RO
40h–41h IDE_TIM Primary IDE Timing Register 0000h R/W
SATA Controller Registers (D31:F2)
572 Datasheet
NOTE: The PCH SATA controller is not arbitrated as a PCI device, therefore it does not need a
master latency timer.
42h–43h IDE_TIM Secondary IDE Timing Register 0000h R/W
44h SIDETIM Slave IDE Timing 00h R/W
48h SDMA_CNT Synchronous DMA Control 00h R/W
4Ah–4Bh SDMA_TIM Synchronous DMA Timing 0000h R/W
54h–57h IDE_CONFIG IDE I/O Configuration 00000000h R/W
70h–71h PID PCI Power Management Capability ID See register
description RO
72h–73h PC PCI Power Management Capabilities See register
description RO
74h–75h PMCS PCI Power Management Control and
Status
See register
description
R/W, RO,
R/WC
80h–81h MSICI Message Signaled Interrupt Capability
ID 7005h RO
82h–83h MSIMC Message Signaled Interrupt Message
Control 0000h RO, R/W
84h–87h MSIMA Message Signaled Interrupt Message
Address 00000000h RO, R/W
88h–89h MSIMD Message Signaled Interrupt Message
Data 0000h R/W
90h MAP Address Map 0000h R/W
92h–93h PCS Port Control and Status 0000h R/W, RO
94h–97h SCGC SATA Clock Gating Control 00000000h R/W
9Ch–9Fh SCLKGC SATA Clock General Configuration 00000000h R/W, R/WO
A0h SIRI SATA Indexed Registers Index 00h R/W
A4h STRD SATA Indexed Register Data XXXXXXXXh R/W
A8h–ABh SATACR0 SATA Capability Register 0 0010B012h RO, R/WO
ACh–AFh SATACR1 SATA Capability Register 1 00000048h RO
B0h–B1h FLRCID FLR Capability ID 0009h RO
B2h–B3h FLRCLV FLR Capability Length and Version See register
description R/WO, RO
B4h–B5h FLRCTRL FLR Control 0000h RO, R/W
C0h ATC APM Trapping Control 00h R/W
C4h ATS ATM Trapping Status 00h R/WC
D0h–D3h SP Scratch Pad 00000000h R/W
E0h–E3h BFCS BIST FIS Control/Status 00000000h R/W, R/WC
E4h–E7h BFTD1 BIST FIS Transmit Data, DW1 00000000h R/W
E8h–EBh BFTD2 BIST FIS Transmit Data, DW2 00000000h R/W
Table 14-1. SATA Controller PCI Register Address Map (SATA–D31:F2) (Sheet 2 of 2)
Offset Mnemonic Register Name Default Type
Datasheet 573
SATA Controller Registers (D31:F2)
14.1.1 VID—Vendor Identification Register (SATA—D31:F2)
Offset Address: 00h01h Attribute: RO
Default Value: 8086h Size: 16 bit
Lockable: No Power Well: Core
14.1.2 DID—Device Identification Register (SATA—D31:F2)
Offset Address: 02h03h Attribute: RO
Default Value: See bit description Size: 16 bit
Lockable: No Power Well: Core
14.1.3 PCICMD—PCI Command Register (SATA–D31:F2)
Address Offset: 04h05h Attribute: RO, R/W
Default Value: 0000h Size: 16 bits
Bit Description
15:0 Vendor ID—RO. This is a 16-bit value assigned to Intel. Intel VID = 8086h
Bit Description
15:0
Device ID—RO. This is a 16-bit value assigned to the PCH SATA controller.
NOTE: The value of this field will change dependent upon the value of the MAP
Register. See Section 14.1.34
Bit Description
15:11 Reserved
10
Interrupt Disable—R/W. This disables pin-based INTx# interrupts. This bit has no
effect on MSI operation.
0 = Internal INTx# messages are generated if there is an interrupt and MSI is not
enabled.
1 = Internal INTx# messages will not be generated.
9 Fast Back to Back Enable (FBE)—RO. Reserved as 0.
8 SERR# Enable (SERR_EN)RO. Reserved as 0.
7 Wait Cycle Control (WCC)—RO. Reserved as 0.
6
Parity Error Response (PER)—R/W.
0 = Disabled. SATA controller will not generate PERR# when a data parity error is
detected.
1 = Enabled. SATA controller will generate PERR# when a data parity error is detected.
5 VGA Palette Snoop (VPS)—RO. Reserved as 0.
4 Postable Memory Write Enable (PMWE)—RO. Reserved as 0.
3 Special Cycle Enable (SCE)—RO. Reserved as 0.
2
Bus Master Enable (BME)—R/W. This bit controls the PCH’s ability to act as a PCI
master for IDE Bus Master transfers. This bit does not impact the generation of
completions for split transaction commands.
1Memory Space Enable (MSE)—R/W / RO. Controls access to the SATA controller’s
target memory space (for AHCI). This bit is RO 0 when not in AHCI/RAID modes.
0
I/O Space Enable (IOSE)—R/W. This bit controls access to the I/O space registers.
0 = Disables access to the Legacy or Native IDE ports (both Primary and Secondary) as
well as the Bus Master I/O registers.
1 = Enable. Note that the Base Address register for the Bus Master registers should be
programmed before this bit is set.
SATA Controller Registers (D31:F2)
574 Datasheet
14.1.4 PCISTS—PCI Status Register (SATA–D31:F2)
Address Offset: 06h07h Attribute: R/WC, RO
Default Value: 02B0h Size: 16 bits
Note: For the writable bits, software must write a 1 to clear bits that are set. Writing a 0 to
the bit has no effect.
Bit Description
15
Detected Parity Error (DPE)—R/WC.
0 = No parity error detected by SATA controller.
1 = SATA controller detects a parity error on its interface.
14 Signaled System Error (SSE)—RO. Reserved as 0.
13
Received Master Abort (RMA)—R/WC.
0 = Master abort Not generated.
1 = SATA controller, as a master, generated a master abort.
12 Reserved as 0RO.
11 Signaled Target Abort (STA)—RO. Reserved as 0.
10:9 DEVSEL# Timing Status (DEV_STS)—RO.
01 = Hardwired; Controls the device select time for the SATA controller’s PCI interface.
8
Data Parity Error Detected (DPED)—R/WC. For PCH, this bit can only be set on read
completions received from the bus when there is a parity error.
1 = SATA controller, as a master, either detects a parity error or sees the parity error
line asserted, and the parity error response bit (bit 6 of the command register) is
set.
7 Fast Back to Back Capable (FB2BC)—RO. Reserved as 1.
6 User Definable Features (UDF)RO. Reserved as 0.
5 66MHz Capable (66MHZ_CAP)RO. Reserved as 1.
4
Capabilities List (CAP_LIST)—RO. This bit indicates the presence of a capabilities
list. The minimum requirement for the capabilities list must be PCI power management
for the SATA controller.
3
Interrupt Status (INTS)—RO. Reflects the state of INTx# messages, IRQ14 or
IRQ15.
0 = Interrupt is cleared (independent of the state of Interrupt Disable bit in the
command register [offset 04h]).
1 = Interrupt is to be asserted
2:0 Reserved
Datasheet 575
SATA Controller Registers (D31:F2)
14.1.5 RID—Revision Identification Register (SATA—D31:F2)
Offset Address: 08h Attribute: RO
Default Value: See bit description Size: 8 bits
14.1.6 PI—Programming Interface Register (SATA–D31:F2)
14.1.6.1 When Sub Class Code Register (D31:F2:Offset 0Ah) = 01h
Address Offset: 09h Attribute: R/W, RO
Default Value: See bit description Size: 8 bits
Bit Description
7:0 Revision ID—RO. See the Intel® 5 Series Chipset and Intel® 3400 Series Chipset
Specification Update for the value of the Revision ID Register
Bit Description
7 This read-only bit is a 1 to indicate that the PCH supports bus master operation
6:4 Reserved. Will always return 0.
3
Secondary Mode Native Capable (SNC)—RO.
0 = Secondary controller only supports legacy mode.
1 = Secondary controller supports both legacy and native modes.
When MAP.MV (D31:F2:Offset 90:bits 1:0) is any value other than 00b, this bit reports
as a 0. When MAP.MV is 00b, this bit reports as a 1.
2
Secondary Mode Native Enable (SNE)—R/W.
Determines the mode that the secondary channel is operating in.
0 = Secondary controller operating in legacy (compatibility) mode
1 = Secondary controller operating in native PCI mode.
When MAP.MV (D31:F2:Offset 90:bits 1:0) is any value other than 00b, this bit is read-
only (RO). When MAP.MV is 00b, this bit is read/write (R/W).
If this bit is set by software, then the PNE bit (bit 0 of this register) must also be set by
software. While in theory these bits can be programmed separately, such a
configuration is not supported by hardware.
1
Primary Mode Native Capable (PNC)—RO.
0 = Primary controller only supports legacy mode.
1 = Primary controller supports both legacy and native modes.
When MAP.MV (D31:F2:Offset 90:bits 1:0) is any value other than 00b, this bit reports
as a 0. When MAP.MV is 00b, this bit reports as a 1.
0
Primary Mode Native Enable (PNE)—R/W.
Determines the mode that the primary channel is operating in.
0 = Primary controller operating in legacy (compatibility) mode.
1 = Primary controller operating in native PCI mode.
If this bit is set by software, then the SNE bit (bit 2 of this register) must also be set by
software simultaneously.
SATA Controller Registers (D31:F2)
576 Datasheet
14.1.6.2 When Sub Class Code Register (D31:F2:Offset 0Ah) = 04h
Address Offset: 09h Attribute: RO
Default Value: 00h Size: 8 bits
14.1.6.3 When Sub Class Code Register (D31:F2:Offset 0Ah) = 06h
Address Offset: 09h Attribute: RO
Default Value: 01h Size: 8 bits
14.1.7 SCC—Sub Class Code Register (SATA–D31:F2)
Address Offset: 0Ah Attribute: RO
Default Value: See bit description Size: 8 bits
Bit Description
7:0 Interface (IF)—RO.
When configured as RAID, this register becomes read only 0.
Bit Description
7:0 Interface (IF)—RO.
Indicates the SATA Controller supports AHCI, rev 1.2.
Bit Description
7:0
Sub Class Code (SCC)
This field specifies the sub-class code of the controller, per the table below:
PCH Only:
PCH Mobile Only:
Intel® Rapid Storage Technology Enabled PCH components Only:
SCC Register Attribute SCC Register Value
RO 01h (IDE Controller)
MAP.SMS (D31:F2:Offset
90h:bit 7:6) SCC Register Value
00b 01h (IDE Controller)
01b 06h (AHCI Controller)
MAP.SMS (D31:F2:Offset
90h:bit 7:6)
SCC Default Register
Value
00b 01h (IDE Controller)
01b 06h (AHCI Controller)
10b 04h (RAID Controller)
Datasheet 577
SATA Controller Registers (D31:F2)
14.1.8 BCC—Base Class Code Register
(SATA–D31:F2SATA–D31:F2)
Address Offset: 0Bh Attribute: RO
Default Value: 01h Size: 8 bits
14.1.9 PMLT—Primary Master Latency Timer Register
(SATA–D31:F2)
Address Offset: 0Dh Attribute: RO
Default Value: 00h Size: 8 bits
14.1.10 HTYPE—Header Type Register
(SATA–D31:F2)
Address Offset: 0Eh Attribute: RO
Default Value: 00h Size: 8 bits
14.1.11 PCMD_BAR—Primary Command Block Base Address
Register (SATA–D31:F2)
Address Offset: 10h13h Attribute: R/W, RO
Default Value: 00000001h Size: 32 bits
.
NOTE: This 8-byte I/O space is used in native mode for the Primary Controller’s Command Block.
Bit Description
7:0 Base Class Code (BCC)—RO.
01h = Mass storage device
Bit Description
7:0
Master Latency Timer Count (MLTC)—RO.
00h = Hardwired. The SATA controller is implemented internally, and is not arbitrated
as a PCI device, so it does not need a Master Latency Timer.
Bit Description
7Multi-function Device (MFD)—RO.
Indicates this SATA controller is not part of a multifunction device.
6:0 Header Layout (HL)—RO.
Indicates that the SATA controller uses a target device layout.
Bit Description
31:16 Reserved
15:3 Base Address—R/W. This field provides the base address of the I/O space (8
consecutive I/O locations).
2:1 Reserved
0Resource Type Indicator (RTE)—RO. Hardwired to 1 to indicate a request for I/O
space.
SATA Controller Registers (D31:F2)
578 Datasheet
14.1.12 PCNL_BAR—Primary Control Block Base Address
Register (SATA–D31:F2)
Address Offset: 14h17h Attribute: R/W, RO
Default Value: 00000001h Size: 32 bits
.
NOTE: This 4-byte I/O space is used in native mode for the Primary Controller’s Command Block.
14.1.13 SCMD_BAR—Secondary Command Block Base Address
Register (IDE D31:F2)
Address Offset: 18h1Bh Attribute: R/W, RO
Default Value: 00000001h Size: 32 bits
NOTE: This 4-byte I/O space is used in native mode for the Secondary Controller’s Command
Block.
14.1.14 SCNL_BAR—Secondary Control Block Base Address
Register (IDE D31:F2)
Address Offset: 1Ch1Fh Attribute: R/W, RO
Default Value: 00000001h Size: 32 bits
NOTE: This 4-byte I/O space is used in native mode for the Secondary Controller Command Block.
Bit Description
31:16 Reserved
15:2 Base Address—R/W. This field provides the base address of the I/O space (4
consecutive I/O locations).
1 Reserved
0 Resource Type Indicator (RTE)—RO. Hardwired to 1 to indicate a request for I/O
space.
Bit Description
31:16 Reserved
15:3 Base Address—R/W. This field provides the base address of the I/O space (8
consecutive I/O locations).
2:1 Reserved
0Resource Type Indicator (RTE)—RO. Hardwired to 1 to indicate a request for I/O
space.
Bit Description
31:16 Reserved
15:2 Base Address—R/W. This field provides the base address of the I/O space (4
consecutive I/O locations).
1Reserved
0Resource Type Indicator (RTE)—RO. Hardwired to 1 to indicate a request for I/O
space.
Datasheet 579
SATA Controller Registers (D31:F2)
14.1.15 BAR—Legacy Bus Master Base Address Register
(SATA–D31:F2)
Address Offset: 20h23h Attribute: R/W, RO
Default Value: 00000001h Size: 32 bits
The Bus Master IDE interface function uses Base Address register 5 to request a 16-
byte I/O space to provide a software interface to the Bus Master functions. Only 12
bytes are actually used (6 bytes for primary, 6 bytes for secondary). Only bits [15:4]
are used to decode the address.
14.1.16 ABAR/SIDPBA1—AHCI Base Address Register/Serial ATA
Index Data Pair Base Address (SATA–D31:F2)
When the programming interface is not IDE (that is, SCC is not 01h), this register is
named ABAR. When the programming interface is IDE, this register becomes SIDPBA.
Note that hardware does not clear those BA bits when switching from IDE component
to non-IDE component or vice versa. BIOS is responsible for clearing those bits to 0
since the number of writable bits changes after component switching (as indicated by a
change in SCC). In the case, this register will then have to be re-programmed to a
proper value.
14.1.16.1 When SCC is not 01h
When the programming interface is not IDE, the register represents a memory BAR
allocating space for the AHCI memory registers defined in Section 14.4.
.
Address Offset: 24–27h Attribute: R/W, RO
Default Value: 00000000h Size: 32 bits
NOTE:
1. The ABAR register must be set to a value of 0001_0000h or greater.
Bit Description
31:16 Reserved
15:5 Base Address—R/W. This field provides the base address of the I/O space (16
consecutive I/O locations).
4
Base—R/W / RO. When SCC is 01h, this bit will be R/W resulting in requesting 16B of I/
O space. When SCC is not 01h, this bit will be Read Only 0, resulting in requesting 32B
of I/O space.
3:1 Reserved
0Resource Type Indicator (RTE)—RO. Hardwired to 1 to indicate a request for I/O
space.
Bit Description
31:11 Base Address (BA)—R/W. Base address of register memory space (aligned to 1 KB)
10:4 Reserved
3Prefetchable (PF)—RO. Indicates that this range is not pre-fetchable
2:1 Type (TP)—RO. Indicates that this range can be mapped anywhere in 32-bit address
space.
0Resource Type Indicator (RTE)—RO. Hardwired to 0 to indicate a request for
register memory space.
SATA Controller Registers (D31:F2)
580 Datasheet
14.1.16.2 When SCC is 01h
When the programming interface is IDE, the register becomes an I/O BAR allocating 16
bytes of I/O space for the I/O-mapped registers defined in Section 14.2. Note that
although 16 bytes of locations are allocated, only 8 bytes are used as SINDX and
SDATA registers; with the remaining 8 bytes preserved for future enhancement.
Address Offset: 24h27h Attribute: R/WO
Default Value: 00000001h Size: 32 bits
14.1.17 SVID—Subsystem Vendor Identification Register
(SATA–D31:F2)
Address Offset: 2Ch2Dh Attribute: R/WO
Default Value: 0000h Size: 16 bits
Lockable: No Power Well: Core
Function Level Reset: No
14.1.18 SID—Subsystem Identification Register (SATA–D31:F2)
Address Offset: 2Eh2Fh Attribute: R/WO
Default Value: 0000h Size: 16 bits
Lockable: No Power Well: Core
Function Level Reset: No
14.1.19 CAP—Capabilities Pointer Register (SATA–D31:F2)
Address Offset: 34h Attribute: RO
Default Value: 80h Size: 8 bits
Bit Description
31:16 Reserved
15:4 Base Address (BA)—R/W. Base address of the I/O space.
3:1 Reserved
0Resource Type Indicator (RTE)—RO. Indicates a request for I/O space.
Bit Description
15:0 Subsystem Vendor ID (SVID)—R/WO. Value is written by BIOS. No hardware action
taken on this value.
Bit Description
15:0 Subsystem ID (SID)—R/WO. Value is written by BIOS. No hardware action taken on
this value.
Bit Description
7:0
Capabilities Pointer (CAP_PTR)—RO. Indicates that the first capability pointer offset
is 80h. This value changes to 70h if the Sub Class Code (SCC) (Dev 31:F2:0Ah) is
configure as IDE mode (value of 01).
Datasheet 581
SATA Controller Registers (D31:F2)
14.1.20 INT_LN—Interrupt Line Register (SATA–D31:F2)
Address Offset: 3Ch Attribute: R/W
Default Value: 00h Size: 8 bits
Function Level Reset: No
14.1.21 INT_PN—Interrupt Pin Register (SATA–D31:F2)
Address Offset: 3Dh Attribute: RO
Default Value: See Register Description Size: 8 bits
14.1.22 IDE_TIM—IDE Timing Register (SATA–D31:F2)
Address Offset: Primary: 40h41h Attribute: R/W
Secondary: 42h43h
Default Value: 0000h Size: 16 bits
Note: Bits 14:12 and 9:0 of this register are R/W to maintain software compatibility. These
bits have no effect on hardware.
Bit Description
7:0
Interrupt Line—R/W. This field is used to communicate to software the interrupt line
that the interrupt pin is connected to.
Interrupt Line register is not reset by FLR.
Bit Description
7:0 Interrupt Pin—RO. This reflects the value of D31IP.SIP (Chipset Config
Registers:Offset 3100h:bits 11:8).
Bit Description
15
IDE Decode Enable (IDE)—R/W. Individually enable/disable the Primary or
Secondary decode.
0 = Disable.
1 = Enables the PCH to decode the associated Command Block (1F0–1F7h for primary,
170–177h for secondary, or their native mode BAR equivalents) and Control Block
(3F6h for primary, 376h for secondary, or their native mode BAR equivalents).
This bit effects the IDE decode ranges for both legacy and native-Mode decoding.
14:12 IDE_TIM Field 2—R/W. This field is R/W to maintain software compatibility. This field
has no effect on hardware.
11:10 Reserved
9:0 IDE_TIM Field 1—R/W. This field is R/W to maintain software compatibility. This field
has no effect on hardware.
SATA Controller Registers (D31:F2)
582 Datasheet
14.1.23 SIDETIM—Slave IDE Timing Register (SATA–D31:F2)
Address Offset: 44h Attribute: R/W
Default Value: 00h Size: 8 bits
Note: This register is R/W to maintain software compatibility. These bits have no effect on
hardware.
14.1.24 SDMA_CNT—Synchronous DMA Control Register
(SATA–D31:F2)
Address Offset: 48h Attribute: R/W
Default Value: 00h Size: 8 bits
Note: This register is R/W to maintain software compatibility. These bits have no effect on
hardware.
14.1.25 SDMA_TIM—Synchronous DMA Timing Register
(SATA–D31:F2)
Address Offset: 4Ah–4Bh Attribute: R/W
Default Value: 0000h Size: 16 bits
Note: This register is R/W to maintain software compatibility. These bits have no effect on
hardware.
Bit Description
7:0 SIDETIM Field 1—R/W. This field is R/W to maintain software compatibility. This field
has no effect on hardware.
Bit Description
7:4 Reserved
3:0 SDMA_CNT Field 1—R/W. This field is R/W to maintain software compatibility. This
field has no effect on hardware.
Bit Description
15:14 Reserved
13:12 SDMA_TIM Field 4—R/W. This field is R/W to maintain software compatibility. This
field has no effect on hardware.
11:10 Reserved
9:8 SDMA_TIM Field 3—R/W. This field is R/W to maintain software compatibility. This
field has no effect on hardware.
7:6 Reserved
5:4 SDMA_TIM Field 2—R/W. This field is R/W to maintain software compatibility. This
field has no effect on hardware.
3:2 Reserved
1:0 SDMA_TIM Field 1—R/W. This field is R/W to maintain software compatibility. This
field has no effect on hardware.
Datasheet 583
SATA Controller Registers (D31:F2)
14.1.26 IDE_CONFIG—IDE I/O Configuration Register
(SATA–D31:F2)
Address Offset: 54h–57h Attribute: R/W
Default Value: 00000000h Size: 32 bits
Note: This register is R/W to maintain software compatibility. These bits have no effect on
hardware.
14.1.27 PID—PCI Power Management Capability Identification
Register (SATA–D31:F2)
Address Offset: 70h71h Attribute: RO
Default Value: XX01h Size: 16 bits
Bit Description
31:24 Reserved
23:12 IDE_CONFIG Field 2—R/W. This field is R/W to maintain software compatibility. This
field has no effect on hardware.
11:8 Reserved
7:0 IDE_CONFIG Field 1—R/W. This field is R/W to maintain software compatibility. This
field has no effect on hardware.
Bits Description
15:8
Next Capability (NEXT)—RO.
B0h—if SCC = 01h (IDE mode) indicating next item is FLR capability pointer.
A8h—for all other values of SCC to point to the next capability structure.
7:0 Capability ID (CID)—RO. Indicates that this pointer is a PCI power management.
SATA Controller Registers (D31:F2)
584 Datasheet
14.1.28 PC—PCI Power Management Capabilities Register
(SATA–D31:F2)
Address Offset: 72h73h Attribute: RO
Default Value: x003h Size: 16 bits
f
Bits Description
15:11
PME Support (PME_SUP)—RO.
00000 = If SCC = 01h, indicates no PME support in IDE mode.
01000 = If SCC is not 01h, in a non-IDE mode, indicates PME# can be generated from
the D3HOT state in the SATA host controller.
10 D2 Support (D2_SUP)—RO. Hardwired to 0. The D2 state is not supported
9 D1 Support (D1_SUP)—RO. Hardwired to 0. The D1 state is not supported
8:6 Auxiliary Current (AUX_CUR)—RO. PME# from D3COLD state is not supported,
therefore this field is 000b.
5Device Specific Initialization (DSI)—RO. Hardwired to 0 to indicate that no device-
specific initialization is required.
4 Reserved
3PME Clock (PME_CLK)—RO. Hardwired to 0 to indicate that PCI clock is not required to
generate PME#.
2:0 Version (VER)—RO. Hardwired to 011 to indicates support for Revision 1.2 of the PCI
Power Management Specification.
Datasheet 585
SATA Controller Registers (D31:F2)
14.1.29 PMCS—PCI Power Management Control and Status
Register (SATA–D31:F2)
Address Offset: 74h75h Attribute: R/W, R/WC
Default Value: xx08h Size: 16 bits
Function Level Reset: No (Bits 8 and 15)
Bits Description
15
PME Status (PMES)—R/WC. Bit is set when a PME event is to be requested, and if this
bit and PMEE is set, a PME# will be generated from the SATA controller
NOTE: Whenever SCC = 01h, hardware will automatically change the attribute of this
bit to RO 0. Software is advised to clear PMEE and PMES together prior to
changing SCC thru MAP.SMS.
This bit is not reset by Function Level Reset.
14:9 Reserved
8
PME Enable (PMEE)—R/W. When set, the SATA controller generates PME# form D3HOT
on a wake event.
NOTE: Whenever SCCSCC = 01h, hardware will automatically change the attribute of
this bit to RO 0. Software is advised to clear PMEE and PMES together prior to
changing SCC thru MAP.SMS.
This bit is not reset by Function Level Reset.
7:4 Reserved
3
No Soft Reset (NSFRST)—RO. These bits are used to indicate whether devices
transitioning from D3HOT state to D0 state will perform an internal reset.
0 = Device transitioning from D3HOT state to D0 state perform an internal reset.
1 = Device transitioning from D3HOT state to D0 state do not perform an internal reset.
Configuration content is preserved. Upon transition from the D3HOT state to D0 state
initialized state, no additional operating system intervention is required to preserve
configuration context beyond writing to the PowerState bits.
Regardless of this bit, the controller transition from D3HOT state to D0 state by a system
or bus segment reset will return to the state D0 uninitialized with only PME context
preserved if PME is supported and enabled.
2Reserved
1:0
Power State (PS)—R/W. These bits are used both to determine the current power
state of the SATA controller and to set a new power state.
00 = D0 state
11 = D3HOT state
When in the D3HOT state, the controller’s configuration space is available, but the I/O
and memory spaces are not. Additionally, interrupts are blocked.
SATA Controller Registers (D31:F2)
586 Datasheet
14.1.30 MSICI—Message Signaled Interrupt Capability
Identification Register (SATA–D31:F2)
Address Offset: 80h81h Attribute: RO
Default Value: 7005h Size: 16 bits
Note: There is no support for MSI when the software is operating in legacy (IDE) mode when
AHCI is not enabled. Prior to switching from AHCI to IDE mode, software must make
sure that MSI is disabled.
14.1.31 MSIMC—Message Signaled Interrupt Message
Control Register (SATA–D31:F2)
Address Offset: 82h83h Attribute: R/W, RO
Default Value: 0000h Size: 16 bits
Note: There is no support for MSI when the software is operating in legacy (IDE) mode when
AHCI is not enabled. Prior to switching from AHCI to IDE mode, software must make
sure that MSI is disabled.
Bits Description
15:8 Next Pointer (NEXT)—RO. Indicates the next item in the list is the PCI power
management pointer.
7:0 Capability ID (CID)—RO. Capabilities ID indicates MSI.
Bits Description
15:8 Reserved
764 Bit Address Capable (C64)—RO. Capable of generating a 32-bit message only.
Datasheet 587
SATA Controller Registers (D31:F2)
6:4
Multiple Message Enable (MME)—R/W.
= 000 (and MSIE is set), a single MSI message will be generated for all SATA ports, and
bits [15:0] of the message vector will be driven from MD[15:0].
Values ‘011b’ to ‘111b’ are reserved. If this field is set to one of these reserved values,
the results are undefined.
NOTE: The CCC interrupt is generated on unimplemented port (AHCI PI register bit
equal to 0). If CCC interrupt is disabled, no MSI shall be generated for the port
dedicated to the CCC interrupt. When CCC interrupt occurs, MD[2:0] is
dependant on CCC_CTL.INT (in addition to MME).
3:1
Multiple Message Capable (MMC)—RO. Indicates the number of interrupt messages
supported by the PCH SATA controller.
000 = 1 MSI Capable (When SCC bit is set to 01h. MSI is not supported in IDE mode)
100 = 8 MSI Capable
0
MSI Enable (MSIE)—R/W /RO. If set, MSI is enabled and traditional interrupt pins are
not used to generate interrupts. This bit is RW when SC.SCC is not 01h and is read-only
0 when SCC is 01h. Note that CMD.ID bit has no effect on MSI.
NOTE: Software must clear this bit to 0 to disable MSI first before changing the number
of messages allocated in the MMC field. Software must also make sure this bit is
cleared to ‘0’ when operating in legacy mode (when GHC.AE = 0).
Bits Description
For 6 port components:
MME Value Driven on
MSI Memory Write
Bits[15:3] Bit[2] Bit[1] Bit[0]
000,
001, 010 MD[15:3] MD[2] MD[1] MD[0]
100 MD[15:3]
Port 0: 0
Port 1: 0
Port 2: 0
Port 3: 0
Port 4: 1
Port 5: 1
Port 0: 0
Port 1: 0
Port 2: 1
Port 3: 1
Port 4: 0
Port 5: 0
Port 0: 0
Port 1: 1
Port 2: 0
Port 3: 1
Port 4: 0
Port 5: 1
For 4 port components:
MME Value Driven on
MSI Memory Write
Bits[15:3] Bit[2] Bit[1] Bit[0]
000,
001, 010 MD[15:3] MD[2] MD[1] MD[0]
100 MD[15:3]
Port 0: 0
Port 1: 0
Port 4: 1
Port 5: 1
Port 0: 0
Port 1: 0
Port 2: 0
Port 3: 0
Port 0: 0
Port 1: 1
Port 2: 0
Port 3: 1
SATA Controller Registers (D31:F2)
588 Datasheet
14.1.32 MSIMA—Message Signaled Interrupt Message
Address Register (SATA–D31:F2)
Address Offset: 84h87h Attribute: R/W
Default Value: 00000000h Size: 32 bits
Note: There is no support for MSI when the software is operating in legacy (IDE) mode when
AHCI is not enabled. Prior to switching from AHCI to IDE mode, software must make
sure that MSI is disabled.
14.1.33 MSIMD—Message Signaled Interrupt Message
Data Register (SATA–D31:F2)
Address Offset: 88h–89h Attribute: R/W
Default Value: 0000h Size: 16 bits
Note: There is no support for MSI when the software is operating in legacy (IDE) mode when
AHCI is not enabled. Prior to switching from AHCI to IDE mode, software must make
sure that MSI is disabled.
Bits Description
31:2 Address (ADDR)—R/W. Lower 32 bits of the system specified message address,
always DWORD aligned.
1:0 Reserved
Bits Description
15:0
Data (DATA)—R/W. This 16-bit field is programmed by system software if MSI is
enabled. Its content is driven onto the lower word of the data bus of the MSI memory
write transaction. Note that when the MME field is set to ‘001’ or ‘010’, bit [0] and bits
[1:0] respectively of the MSI memory write transaction will be driven based on the
source of the interrupt rather than from MD[2:0]. See the description of the MME field.
Datasheet 589
SATA Controller Registers (D31:F2)
14.1.34 MAP—Address Map Register (SATA–D31:F2)
Address Offset: 90h Attribute: R/W, R/WO
Default Value: 0000h Size: 16 bits
Function Level Reset: No (Bits 7:5 and 13:8 only)
Bits Description
15:8 Reserved
7:6
SATA Mode Select (SMS)—R/W. Software programs these bits to control the mode in
which the SATA Controller should operate:
00b = IDE mode
01b = AHCI mode
10b = RAID mode
11b = Reserved
NOTES:
1. The SATA Function Device ID will change based on the value of this register.
2. When switching from AHCI or RAID mode to IDE mode, a 2 port SATA controller
(Device 31, Function 5) will be enabled.
3. AHCI mode may only be selected when MV = 00
4. RAID mode may only be selected when MV = 00
5. Programming these bits with values that are invalid (such as, selecting RAID
when in combined mode) will result in indeterministic behavior by the HW
6. SW shall not manipulate SMS during runtime operation; that is, the OS will not
do this. The BIOS may choose to switch from one mode to another during POST.
These bits are not reset by Function Level Reset.
5
SATA Port-to-Controller Configuration (SC)—R/W. This bit changes the number of
SATA ports available within each SATA Controller.
0 = Up to 4 SATA ports are available for Controller 1 (Device 31 Function 2) with ports
[3:0] and up to 2 SATA ports are available for Controller 2 (Device 31 Function 5)
with ports [5:4].
1 = Up to 6 SATA ports are available for Controller 1 (Device 31 Function 2) with ports
[5:0] and no SATA ports are available for Controller 2 (Device 31 Function 5).
NOTE: This bit should be set to 1 in AHCI/RAID mode. This bit is not reset by Function
Level Reset.
4:2 Reserved
1:0 Map Value (MV)—RO. Reserved
SATA Controller Registers (D31:F2)
590 Datasheet
14.1.35 PCS—Port Control and Status Register (SATA–D31:F2)
Address Offset: 92h93h Attribute: R/W, RO
Default Value: 0000h Size: 16 bits
Function Level Reset: No
By default, the SATA ports are set to the disabled state (bits [5:0] = 0). When enabled
by software, the ports can transition between the on, partial, and slumber states and
can detect devices. When disabled, the port is in the “off” state and cannot detect any
devices.
If an AHCI-aware or RAID enabled operating system is being booted, then system BIOS
shall insure that all supported SATA ports are enabled prior to passing control to the
OS. Once the AHCI aware OS is booted it becomes the enabling/disabling policy owner
for the individual SATA ports. This is accomplished by manipulating a port’s PxSCTL and
PxCMD fields. Because an AHCI or RAID aware OS will typically not have knowledge of
the PxE bits and because the PxE bits act as master on/off switches for the ports, pre-
boot software must insure that these bits are set to 1 prior to booting the OS,
regardless as to whether or not a device is currently on the port.
Bits Description
15
OOB Retry Mode (ORM)—RW.
0 = The SATA controller will not retry after an OOB failure
1 = The SATA controller will continue to retry after an OOB failure until successful
(infinite retry)
14 Reserved
13
Port 5 Present (P5P)RO. The status of this bit may change at any time. This bit is
cleared when the port is disabled using P5E. This bit is not cleared upon surprise
removal of a device.
0 = No device detected.
1 = The presence of a device on Port 5 has been detected.
12
Port 4 Present (P4P)RO. The status of this bit may change at any time. This bit is
cleared when the port is disabled using P4E. This bit is not cleared upon surprise
removal of a device.
0 = No device detected.
1 = The presence of a device on Port 4 has been detected.
11
(Desktop
Only)
Port 3 Present (P3P)RO. The status of this bit may change at any time. This bit is
cleared when the port is disabled using P3E. This bit is not cleared upon surprise
removal of a device.
0 = No device detected.
1 = The presence of a device on Port 3 has been detected.
10
(Desktop
Only)
Port 2 Present (P2P)RO. The status of this bit may change at any time. This bit is
cleared when the port is disabled using P2E. This bit is not cleared upon surprise
removal of a device.
0 = No device detected.
1 = The presence of a device on Port 2 has been detected.
11:10
(Mobile
Only)
Reserved
9
Port 1 Present (P1P)RO. The status of this bit may change at any time. This bit is
cleared when the port is disabled using P1E. This bit is not cleared upon surprise
removal of a device.
0 = No device detected.
1 = The presence of a device on Port 1 has been detected.
Datasheet 591
SATA Controller Registers (D31:F2)
8
Port 0 Present (P0P)—RO. The status of this bit may change at any time. This bit is
cleared when the port is disabled using P0E. This bit is not cleared upon surprise
removal of a device.
0 = No device detected.
1 = The presence of a device on Port 0 has been detected.
7:6 Reserved
5
Port 5 Enabled (P5E)—R/W.
0 = Disabled. The port is in the ‘off’ state and cannot detect any devices.
1 = Enabled. The port can transition between the on, partial, and slumber states and
can detect devices.
NOTE: This bit takes precedence over P5CMD.SUD (offset ABAR+298h:bit 1)
If MAP.SC is 0, if SCC is 01h, this bit will be read only 0 or if MAP.SPD[5] is 1.
4
Port 4 Enabled (P4E)—R/W.
0 = Disabled. The port is in the ‘off’ state and cannot detect any devices.
1 = Enabled. The port can transition between the on, partial, and slumber states and
can detect devices.
NOTE: This bit takes precedence over P4CMD.SUD (offset ABAR+298h:bit 1)
If MAP.SC is 0, if SCC is 01h, this bit will be read only 0 or if MAP.SPD[4] is 1.
3
(Desktop
Only)
Port 3 Enabled (P3E)—R/W.
0 = Disabled. The port is in the ‘off’ state and cannot detect any devices.
1 = Enabled. The port can transition between the on, partial, and slumber states and
can detect devices.
NOTE: This bit takes precedence over P3CMD.SUD (offset ABAR+298h:bit 1). When
MAP.SPD[3] is 1 this is reserved and is read-only 0.
2
(Desktop
Only)
Port 2 Enabled (P2E)—R/W.
0 = Disabled. The port is in the ‘off’ state and cannot detect any devices.
1 = Enabled. The port can transition between the on, partial, and slumber states and
can detect devices.
NOTE: This bit takes precedence over P2CMD.SUD (offset ABAR+218h:bit 1). When
MAP.SPD[2] is 1 this is reserved and is read-only 0.
3:2
(Mobile
Only)
Reserved
1
Port 1 Enabled (P1E)—R/W.
0 = Disabled. The port is in the ‘off’ state and cannot detect any devices.
1 = Enabled. The port can transition between the on, partial, and slumber states and
can detect devices.
NOTE: This bit takes precedence over P1CMD.SUD (offset ABAR+198h:bit 1). When
MAP.SPD[1] is 1 this is reserved and is read-only 0.
0
Port 0 Enabled (P0E)—R/W.
0 = Disabled. The port is in the ‘off’ state and cannot detect any devices.
1 = Enabled. The port can transition between the on, partial, and slumber states and
can detect devices.
NOTE: This bit takes precedence over P0CMD.SUD (offset ABAR+118h:bit 1). When
MAP.SPD[0] is 1 this is reserved and is read-only 0.
Bits Description
SATA Controller Registers (D31:F2)
592 Datasheet
14.1.36 SCLKCG—SATA Clock Gating Control Register
Address Offset: 94h–97h Attribute: R/W
Default Value: 00000000h Size: 32 bits
.
Bit Description
31:30 Reserved
29:24
Port Clock Disable (PCD)—R/W.
0 = All clocks to the associated port logic will operate normally.
1 = The backbone clock driven to the associated port logic is gated and will not
toggle.
Bit 29: Port 5
Bit 28: Port 4
Bit 27: Port 3
BIt 26: Port 2
Bit 25: Port 1
Bit 24: Port 0
If a port is not available, software shall set the corresponding bit to 1. Software can
also set the corresponding bits to 1 on ports that are disabled.
Software cannot set the PCD [port x]=1 if the corresponding PCS.PxE=1 in either
Dev31Func2 or Dev31Func5 (dual controller IDE mode) or AHCI GHC.PI[x] = “1”.
23:9 Reserved
8:0 SCLKCG Field 1—R/W. BIOS must program these bits to 183h.
Datasheet 593
SATA Controller Registers (D31:F2)
14.1.37 SCLKGC—SATA Clock General Configuration Register
Address Offset: 9Ch–9Fh Attribute: R/W, R/WO
Default Value: 00000000h Size: 32 bits
Function Level Reset: No
Bit Description
31:8 Reserved
7
(non-RAID
Capable
SKUs Only)
Reserved
7
(Raid
Capable
SKUs Only)
Alternate ID Enable (AIE)—R/WO.
0 = When in RAID mode the SATA Controller located at Device 31: Function 2 will
report the Device ID 2822h for Desktop or 282Ah for Mobile and the Microsoft
Windows Vista* and Windows* 7 in-box version of the Intel® Rapid Storage
Manager will load on the platform.
1 = When in RAID mode the SATA Controller located at Device 31: Function 2 will
report the Device ID 3B25h for Desktop RAID 0/1/5/10, 3B2Ch for Mobile to
prevent the Microsoft Windows Vista or Windows 7 in-box version of the
Intel® Rapid Storage Manager from loading on the platform and will require
the user to perform an ‘F6’ installation of the appropriate Intel® Rapid Storage
Manager.
NOTE: This field is applicable when the AHCI is configured for RAID mode of
operation. It has no impact for AHCI and IDE modes of operation. BIOS is
recommended to program this bit prior to programming the MAP.SMS field
to reflect RAID. This field is reset by PLTRST#. BIOS is required to
reprogram the value of this bit after resuming from S3, S4 and S5.
6:2 Reserved
1
SATA2-port Configuration Indicator (SATA2PIND)—RO.
0 = Normal configuration.
1 = One IDE Controller is implemented supporting only two ports for a Primary
Master and a Secondary Master.
NOTE: When set, BIOS must ensure that bit 2 and bit 3 of the AHCI PI registers
are zeros. BIOS must also make sure that Port 2 and Port 3 are disabled
(using PCS configuration register) and the port clocks are gated (using
SCLKCG configuration register).
0
SATA4-port All Master Configuration Indicator (SATA4PMIND)—RO.
0 = Normal configuration.
1 = Two IDE Controllers are implemented, each supporting two ports for a Primary
Master and a Secondary Master.
NOTE: When set, BIOS must ensure that bit 2 and bit 3 of the AHCI PI registers
are zeros. BIOS must also make sure that Port 2 and Port 3 are disabled
(using PCS configuration register) and the port clocks are gated (using
SCLKCG configuration register).
SATA Controller Registers (D31:F2)
594 Datasheet
14.1.38 SIRI—SATA Indexed Registers Index Register
Address Offset: A0h Attribute: R/W
Default Value: 00h Size: 8 bits
.
14.1.39 FLRCID—FLR Capability ID Register (SATA–D31:F2)
Address Offset: B0–B1h Attribute: RO
Default Value: 0009h Size: 16 bits
Bit Description
7:2 Index (IDX)—R/W. This field is a 5-bit index pointer into the SATA Indexed Register
space. Data is written into and read from the SIRD register (D31:F2:A4h).
1:0 Reserved
Bit Description
15:8 Next Capability Pointer—RO. 00h indicates the final item in the capability list.
7:0
Capability ID—RO. The value of this field depends on the FLRCSSEL bit.
13h = If PFLRCSSEL = 0
09h (Vendor Specific) = If PFLRCSSEL = 1
Datasheet 595
SATA Controller Registers (D31:F2)
14.1.40 FLRCLV—FLR Capability Length and Version
Register (SATA–D31:F2)
Address Offset: B2–B3h Attribute: RO, R/WO
Default Value: xx06h Size: 16 bits
Function Level Reset: No (Bit 9:8 Only when FLRCSSEL = 0)
When FLRCSSEL = 0, this register is defined as follows:
When FLRCSSEL = 1, this register is defined as follows:
14.1.41 FLRC—FLR Control Register (SATA–D31:F2)
Address Offset: B4–B5h Attribute: RO, R/W
Default Value: 0000h Size: 16 bits
Bit Description
15:10 Reserved
9
FLR Capability—R/WO.
1 = Support for Function Level reset.
This bit is not reset by the Function Level Reset.
8
TXP Capability—R/WO.
1 = Support for Transactions Pending (TXP) bit. TXP must be supported if FLR is
supported.
7:0
Vendor-Specific Capability ID—RO. This field indicates the # of bytes of this Vendor
Specific capability as required by the PCI specification. It has the value of 06h for the
FLR capability.
Bit Description
15:12 Vendor-Specific Capability ID—RO. A value of 2h identifies this capability as the
Function Level Reset (FLR).
11:8 Capability Version—RO. This field indicates the version of the FLR capability.
7:0
Vendor-Specific Capability ID—RO. This field indicates the # of bytes of this Vendor
Specific capability as required by the PCI specification. It has the value of 06h for the
FLR capability.
Bit Description
15:9 Reserved
8
Transactions Pending (TXP)—RO.
0 = Controller has received all non-posted requests.
1 = Controller has issued non-posted requests which has not been completed.
7:1 Reserved
0
Initiate FLR—R/W. Used to initiate FLR transition. A write of 1 indicates FLR transition.
Since hardware must no t respond to any cycles till FLR completion the value read by
software from this bit is 0.
SATA Controller Registers (D31:F2)
596 Datasheet
14.1.42 ATC—APM Trapping Control Register (SATA–D31:F2)
Address Offset: C0h Attribute: R/W
Default Value: 00h Size: 8 bits
Function Level Reset:No
.
14.1.43 ATS—APM Trapping Status Register (SATA–D31:F2)
Address Offset: C4h Attribute: R/WC
Default Value: 00h Size: 8 bits
Function Level Reset: No
.
14.1.44 SP Scratch Pad Register (SATA–D31:F2)
Address Offset: D0h Attribute: R/W
Default Value: 00000000h Size: 32 bits
.
Bit Description
7:4 Reserved
3
Secondary Slave Trap (SST)—R/W. Enables trapping and SMI# assertion on legacy
I/O accesses to 170h–177h and 376h. The active device on the secondary interface
must be device 1 for the trap and/or SMI# to occur.
2
Secondary Master Trap (SPT)—R/W. Enables trapping and SMI# assertion on legacy
I/O accesses to 170h-177h and 376h. The active device on the secondary interface
must be device 0 for the trap and/or SMI# to occur.
1
Primary Slave Trap (PST)—R/W. Enables trapping and SMI# assertion on legacy I/O
accesses to 1F0h–1F7h and 3F6h. The active device on the primary interface must be
device 1 for the trap and/or SMI# to occur.
0
Primary Master Trap (PMT)—R/W. Enables trapping and SMI# assertion on legacy I/
O accesses to 1F0h–1F7h and 3F6h. The active device on the primary interface must be
device 0 for the trap and/or SMI# to occur.
Bit Description
7:4 Reserved
3Secondary Slave Trap (SST)—R/WC. Indicates that a trap occurred to the secondary
slave device.
2Secondary Master Trap (SPT)—R/WC. Indicates that a trap occurred to the
secondary master device.
1Primary Slave Trap (PST)—R/WC. Indicates that a trap occurred to the primary slave
device.
0Primary Master Trap (PMT)—R/WC. Indicates that a trap occurred to the primary
master device.
Bit Description
31:0 Data (DT)—R/W. This is a read/write register that is available for software to use. No
hardware action is taken on this register.
Datasheet 597
SATA Controller Registers (D31:F2)
14.1.45 BFCS—BIST FIS Control/Status Register (SATA–D31:F2)
Address Offset: E0hE3h Attribute: R/W, R/WC
Default Value: 00000000h Size: 32 bits
Bits Description
31:16 Reserved
15
Port 5 BIST FIS Initiate (P5BFI)—R/W. When a rising edge is detected on this bit
field, the PCH initiates a BIST FIS to the device on Port 5, using the parameters
specified in this register and the data specified in BFTD1 and BFTD2. The BIST FIS
will only be initiated if a device on Port 5 is present and ready (not partial/slumber
state). After a BIST FIS is successfully completed, software must disable and re-
enable the port using the PxE bits at offset 92h prior to attempting additional BIST
FISs or to return the PCH to a normal operational mode. If the BIST FIS fails to
complete, as indicated by the BFF bit in the register, then software can clear then set
the P5BFI bit to initiate another BIST FIS. This can be retried until the BIST FIS
eventually completes successfully
14
Port 4 BIST FIS Initiate (P4BFI)—R/W. When a rising edge is detected on this bit
field, the PCH initiates a BIST FIS to the device on Port 4, using the parameters
specified in this register and the data specified in BFTD1 and BFTD2. The BIST FIS
will only be initiated if a device on Port 4 is present and ready (not partial/slumber
state). After a BIST FIS is successfully completed, software must disable and re-
enable the port using the PxE bits at offset 92h prior to attempting additional BIST
FISs or to return the PCH to a normal operational mode. If the BIST FIS fails to
complete, as indicated by the BFF bit in the register, then software can clear then set
the P4BFI bit to initiate another BIST FIS. This can be retried until the BIST FIS
eventually completes successfully
13
(Desktop
Only)
Port 3 BIST FIS Initiate (P3BFI)—R/W. When a rising edge is detected on this bit
field, the PCH initiates a BIST FIS to the device on Port 3, using the parameters
specified in this register and the data specified in BFTD1 and BFTD2. The BIST FIS
will only be initiated if a device on Port 3 is present and ready (not partial/slumber
state). After a BIST FIS is successfully completed, software must disable and re-
enable the port using the PxE bits at offset 92h prior to attempting additional BIST
FISs or to return the PCH to a normal operational mode. If the BIST FIS fails to
complete, as indicated by the BFF bit in the register, then software can clear then set
the P3BFI bit to initiate another BIST FIS. This can be retried until the BIST FIS
eventually completes successfully
12
(Desktop
Only)
Port 2 BIST FIS Initiate (P2BFI)—R/W. When a rising edge is detected on this bit
field, the PCH initiates a BIST FIS to the device on Port 2, using the parameters
specified in this register and the data specified in BFTD1 and BFTD2. The BIST FIS
will only be initiated if a device on Port 2 is present and ready (not partial/slumber
state). After a BIST FIS is successfully completed, software must disable and re-
enable the port using the PxE bits at offset 92h prior to attempting additional BIST
FISes or to return the PCH to a normal operational mode. If the BIST FIS fails to
complete, as indicated by the BFF bit in the register, then software can clear then set
the P2BFI bit to initiate another BIST FIS. This can be retried until the BIST FIS
eventually completes successfully
13:12
(Mobile
Only)
Reserved
SATA Controller Registers (D31:F2)
598 Datasheet
11
BIST FIS Successful (BFS)—R/WC.
0 = Software clears this bit by writing a 1 to it.
1 = This bit is set any time a BIST FIS transmitted by PCH receives an R_OK
completion status from the device.
NOTE: This bit must be cleared by software prior to initiating a BIST FIS.
10
BIST FIS Failed (BFF)—R/WC.
0 = Software clears this bit by writing a 1 to it.
1 = This bit is set any time a BIST FIS transmitted by PCH receives an R_ERR
completion status from the device.
NOTE: This bit must be cleared by software prior to initiating a BIST FIS.
9
Port 1 BIST FIS Initiate (P1BFI)—R/W. When a rising edge is detected on this bit
field, the PCH initiates a BIST FIS to the device on Port 1, using the parameters
specified in this register and the data specified in BFTD1 and BFTD2. The BIST FIS
will only be initiated if a device on Port 1 is present and ready (not partial/slumber
state). After a BIST FIS is successfully completed, software must disable and re-
enable the port using the PxE bits at offset 92h prior to attempting additional BIST
FISes or to return the PCH to a normal operational mode. If the BIST FIS fails to
complete, as indicated by the BFF bit in the register, then software can clear then set
the P1BFI bit to initiate another BIST FIS. This can be retried until the BIST FIS
eventually completes successfully.
8
Port 0 BIST FIS Initiate (P0BFI)R/W. When a rising edge is detected on this bit
field, the PCH initiates a BIST FIS to the device on Port 0, using the parameters
specified in this register and the data specified in BFTD1 and BFTD2. The BIST FIS
will only be initiated if a device on Port 0 is present and ready (not partial/slumber
state). After a BIST FIS is successfully completed, software must disable and re-
enable the port using the PxE bits at offset 92h prior to attempting additional BIST
FISes or to return the PCH to a normal operational mode. If the BIST FIS fails to
complete, as indicated by the BFF bit in the register, then software can clear then set
the P0BFI bit to initiate another BIST FIS. This can be retried until the BIST FIS
eventually completes successfully.
7:2
BIST FIS Parameters (BFP)—R/W. These 6 bits form the contents of the upper 6
bits of the BIST FIS Pattern Definition in any BIST FIS transmitted by the PCH. This
field is not port specific—its contents will be used for any BIST FIS initiated on port 0,
port 1, port 2 or port 3. The specific bit definitions are:
Bit 7: T – Far End Transmit mode
Bit 6: A – Align Bypass mode
Bit 5: S – Bypass Scrambling
Bit 4: L – Far End Retimed Loopback
Bit 3: F – Far End Analog Loopback
Bit 2: P – Primitive bit for use with Transmit mode
1:0 Reserved
Bits Description
Datasheet 599
SATA Controller Registers (D31:F2)
14.1.46 BFTD1—BIST FIS Transmit Data1 Register (SATA–D31:F2)
Address Offset: E4hE7h Attribute: R/W
Default Value: 00000000h Size: 32 bits
14.1.47 BFTD2—BIST FIS Transmit Data2 Register (SATA–D31:F2)
Address Offset: E8hEBh Attribute: R/W
Default Value: 00000000h Size: 32 bits
Bits Description
31:0
BIST FIS Transmit Data 1—R/W. The data programmed into this register will form the
contents of the second DWord of any BIST FIS initiated by the PCH. This register is not
port specific—its contents will be used for BIST FIS initiated on any port. Although the
2nd and 3rd DWs of the BIST FIS are only meaningful when the “T” bit of the BIST FIS
is set to indicateFar-End Transmit mode, this register’s contents will be transmitted as
the BIST FIS 2nd DW regardless of whether or not the “T” bit is indicated in the BFCS
register (D31:F2:E0h).
Bits Description
31:0
BIST FIS Transmit Data 2—R/W. The data programmed into this register will form the
contents of the third DWord of any BIST FIS initiated by the PCH. This register is not
port specific—its contents will be used for BIST FIS initiated on any port. Although the
2nd and 3rd DWs of the BIST FIS are only meaningful when the “T” bit of the BIST FIS
is set to indicateFar-End Transmit mode, this register’s contents will be transmitted as
the BIST FIS 3rd DW regardless of whether or not the “T” bit is indicated in the BFCS
register (D31:F2:E0h).
SATA Controller Registers (D31:F2)
600 Datasheet
14.2 Bus Master IDE I/O Registers (D31:F2)
The bus master IDE function uses 16 bytes of I/O space, allocated using the BAR
register, located in Device 31:Function 2 Configuration space, offset 20h. All bus
master IDE I/O space registers can be accessed as byte, word, or DWord quantities.
Reading reserved bits returns an indeterminate, inconsistent value, and writes to
reserved bits have no affect (but should not be attempted). These registers are only
used for legacy operation. Software must not use these registers when running AHCI.
All I/O registers are reset by Function Level Reset. The register address I/O map is
shown in Table 14-2.
Table 14-2. Bus Master IDE I/O Register Address Map
BAR+
Offset Mnemonic Register Default Type
00 BMICP Command Register Primary 00h R/W
01 Reserved RO
02 BMISP Bus Master IDE Status Register Primary 00h R/W, R/
WC, RO
03 Reserved RO
04–07 BMIDP Bus Master IDE Descriptor Table Pointer
Primary xxxxxxxxh R/W
08 BMICS Command Register Secondary 00h R/W
09 Reserved RO
0Ah BMISS Bus Master IDE Status Register Secondary 00h R/W, R/
WC, RO
0Bh Reserved RO
0Ch–0F
hBMIDS Bus Master IDE Descriptor Table Pointer
Secondary xxxxxxxxh R/W
10h AIR AHCI Index Register 00000000h R/W, RO
14h AIDR AHCI Index Data Register xxxxxxxxh R/W
Datasheet 601
SATA Controller Registers (D31:F2)
14.2.1 BMIC[P,S]—Bus Master IDE Command Register (D31:F2)
Address Offset: Primary: BAR + 00h Attribute: R/W
Secondary: BAR + 08h
Default Value: 00h Size: 8 bits
Bit Description
7:4 Reserved. Returns 0.
3
Read / Write Control (R/WC)—R/W. This bit sets the direction of the bus master
transfer. This bit must NOT be changed when the bus master function is active.
0 = Memory reads
1 = Memory writes
2:1 Reserved. Returns 0.
0
Start/Stop Bus Master (START)—R/W.
0 = All state information is lost when this bit is cleared. Master mode operation cannot
be stopped and then resumed. If this bit is reset while bus master operation is still
active (that is, the Bus Master IDE Active bit (D31:F2:BAR + 02h, bit 0) of the Bus
Master IDE Status register for that IDE channel is set) and the drive has not yet
finished its data transfer (the Interrupt bit in the Bus Master IDE Status register for
that IDE channel is not set), the bus master command is said to be aborted and
data transferred from the drive may be discarded instead of being written to
system memory.
1 = Enables bus master operation of the controller. Bus master operation does not
actually start unless the Bus Master Enable bit (D31:F2:04h, bit 2) in PCI
configuration space is also set. Bus master operation begins when this bit is
detected changing from 0 to 1. The controller will transfer data between the IDE
device and memory only when this bit is set. Master operation can be halted by
writing a 0 to this bit.
NOTE: This bit is intended to be cleared by software after the data transfer is
completed, as indicated by either the Bus Master IDE Active bit being cleared or
the Interrupt bit of the Bus Master IDE Status register for that IDE channel
being set, or both. Hardware does not clear this bit automatically. If this bit is
cleared to 0 prior to the DMA data transfer being initiated by the drive in a
device to memory data transfer, then the PCH will not send DMAT to terminate
the data transfer. SW intervention (such as, sending SRST) is required to reset
the interface in this condition.
SATA Controller Registers (D31:F2)
602 Datasheet
14.2.2 BMIS[P,S]—Bus Master IDE Status Register (D31:F2)
Address Offset: Primary: BAR + 02h Attribute: R/W, R/WC, RO
Secondary: BAR + 0Ah
Default Value: 00h Size: 8 bits
Bit Description
7
PRD Interrupt Status (PRDIS)—R/WC.
0 = Software clears this bit by writing a 1 to it.
1 = This bit is set when the host controller execution of a PRD that has its PRD_INT bit
set.
6
Drive 1 DMA Capable—R/W.
0 = Not Capable.
1 = Capable. Set by device dependent code (BIOS or device driver) to indicate that
drive 1 for this channel is capable of DMA transfers, and that the controller has
been initialized for optimum performance. The PCH does not use this bit. It is
intended for systems that do not attach BMIDE to the PCI bus.
5
Drive 0 DMA Capable—R/W.
0 = Not Capable
1 = Capable. Set by device dependent code (BIOS or device driver) to indicate that
drive 0 for this channel is capable of DMA transfers, and that the controller has
been initialized for optimum performance. The PCH does not use this bit. It is
intended for systems that do not attach BMIDE to the PCI bus.
4:3 Reserved. Returns 0.
2
Interrupt—R/WC.
0 = Software clears this bit by writing a 1 to it.
1 = Set when a device FIS is received with theI bit set, provided that software has not
disabled interrupts using the IEN bit of the Device Control Register (see chapter 5
of the Serial ATA Specification, Revision 1.0a).
1
Error—R/WC.
0 = Software clears this bit by writing a 1 to it.
1 = This bit is set when the controller encounters a target abort or master abort when
transferring data on PCI.
0
Bus Master IDE Active (ACT)—RO.
0 = This bit is cleared by the PCH when the last transfer for a region is performed,
where EOT for that region is set in the region descriptor. It is also cleared by the
PCH when the Start Bus Master bit (D31:F2:BAR+ 00h, bit 0) is cleared in the
Command register. When this bit is read as a 0, all data transferred from the drive
during the previous bus master command is visible in system memory, unless the
bus master command was aborted.
1 = Set by the PCH when the Start bit is written to the Command register.
Datasheet 603
SATA Controller Registers (D31:F2)
14.2.3 BMID[P,S]—Bus Master IDE Descriptor Table Pointer
Register (D31:F2)
Address Offset: Primary: BAR + 04h–07h Attribute: R/W
Secondary: BAR + 0Ch0Fh
Default Value: All bits undefined Size: 32 bits
14.2.4 AIR—AHCI Index Register (D31:F2)
Address Offset: Primary: BAR + 10h Attribute: R/W
Default Value: 00000000h Size: 32 bits
This register is available only when SCC is not 01h.
14.2.5 AIDR—AHCI Index Data Register (D31:F2)
Address Offset: Primary: BAR + 14h Attribute: R/W
Default Value: All bits undefined Size: 32 bits
This register is available only when SCC is not 01h.
Bit Description
31:2
Address of Descriptor Table (ADDR)—R/W. The bits in this field correspond to bits
[31:2] of the memory location of the Physical Region Descriptor (PRD). The Descriptor
Table must be Dword-aligned. The Descriptor Table must not cross a 64-K boundary in
memory.
1:0 Reserved
Bit Description
31:11 Reserved
10:2
Index (INDEX)—R/W. This Index register is used to select the Dword offset of the
Memory Mapped AHCI register to be accessed. A Dword, Word or Byte access is
specified by the active byte enables of the I/O access to the Data register.
1:0 Reserved
Bit Description
31:0
Data (DATA)—R/W. This Data register is a “window” through which data is read or
written to the AHCI memory mapped registers. A read or write to this Data register
triggers a corresponding read or write to the memory mapped register pointed to by
the Index register. The Index register must be setup prior to the read or write to this
Data register.
Note that a physical register is not actually implemented as the data is actually stored
in the memory mapped registers.
Since this is not a physical register, the “default” value is the same as the default value
of the register pointed to by Index.
SATA Controller Registers (D31:F2)
604 Datasheet
14.3 Serial ATA Index/Data Pair Superset Registers
All of these I/O registers are in the core well. They are exposed only when SCC is 01h
(that is, IDE programming interface).
These are Index/Data Pair registers that are used to access the SerialATA superset
registers (SerialATA Status, SerialATA Control, and SerialATA Error). The I/O space for
these registers is allocated through SIDPBA. Locations with offset from 08h to 0Fh are
reserved for future expansion. Software-write operations to the reserved locations will
have no effect while software-read operations to the reserved locations will return 0.
14.3.1 SINDX—Serial ATA Index Register (D31:F2)
Address Offset: SIDPBA + 00h Attribute: R/W
Default Value: 00000000h Size: 32 bits
Offset Mnemonic Register
00h–03h SINDEX Serial ATA Index
04h–07h SDATA Serial ATA Data
08h–0Ch Reserved
0Ch–0Fh Reserved
Bit Description
31:16 Reserved
15.8
Port Index (PIDX)—R/W. This Index field is used to specify the port of the SATA
controller at which the port-specific SSTS, SCTL, and SERR registers are located.
00h = Primary Master (Port 0)
01h = Primary Slave (Port 2)
02h = Secondary Master (Port 1)
03h = Secondary Slave (Port 3)
All other values are Reserved.
7:0
Register Index (RIDX)—R/W. This index field is used to specify one out of three
registers currently being indexed into. These three registers are the Serial ATA superset
SStatus, SControl and SError memory registers and are port specific, hence for this
SATA controller, there are four sets of these registers. See Section 14.4.2.10,
Section 14.4.2.11, and Section 14.4.2.12 for definitions of the SStatus, SControl and
SError registers.
00h = SSTS
01h = SCTL
02h = SERR
All other values are Reserved.
Datasheet 605
SATA Controller Registers (D31:F2)
14.3.2 SDATA—Serial ATA Data Register (D31:F2)
Address Offset: SIDPBA + 04h Attribute: R/W
Default Value: 00000000h Size: 32 bits
14.3.2.1 PxSSTS—Serial ATA Status Register (D31:F2)
Address Offset: Attribute: RO
Default Value: 00000000h Size: 32 bits
SDATA when SINDX.RIDX is 00h. This is a 32-bit register that conveys the current state
of the interface and host. The PCH updates it continuously and asynchronously. When
the PCH transmits a COMRESET to the device, this register is updated to its reset
values.
Bit Description
31:0
Data (DATA)—R/W. This Data register is a “window” through which data is read or
written to from the register pointed to by the Serial ATA Index (SINDX) register above.
Note that a physical register is not actually implemented as the data is actually stored
in the memory mapped registers.
Since this is not a physical register, the “default” value is the same as the default value
of the register pointed to by SINDX.RIDX field.
Bit Description
31:12 Reserved
11:8
Interface Power Management (IPM)—RO. Indicates the current interface state:
All other values reserved.
7:4
Current Interface Speed (SPD)—RO. Indicates the negotiated interface
communication speed.
All other values reserved.
The PCH Supports Generation 1 communication rates (1.5 Gb/s) and Gen 2 rates
(3.0 Gb/s).
3:0
Device Detection (DET)—RO. This field indicates the interface device detection and
Phy state:
All other values reserved.
Value Description
0h Device not present or communication not established
1h Interface in active state
2h Interface in PARTIAL power management state
6h Interface in SLUMBER power management state
Value Description
0h Device not present or communication not established
1h Generation 1 communication rate negotiated
2h Generation 2 communication rate negotiated
Value Description
0h No device detected and Phy communication not established
1h Device presence detected but Phy communication not established
3h Device presence detected and Phy communication established
4h Phy in offline mode as a result of the interface being disabled or
running in a BIST loopback mode
SATA Controller Registers (D31:F2)
606 Datasheet
14.3.2.2 PxSCTL—Serial ATA Control Register (D31:F2)
Address Offset: Attribute: R/W, RO
Default Value: 00000004h Size: 32 bits
SDATA when SINDX.RIDX is 01h. This is a 32-bit read-write register by which software
controls SATA capabilities. Writes to the SControl register result in an action being
taken by the PCH or the interface. Reads from the register return the last value written
to it.
Bit Description
31:16 Reserved
15:12 Select Power Management (SPM)—RO. This field is not used by AHCI.
11:8
Interface Power Management Transitions Allowed (IPM)—R/W. This field
indicates which power states the PCH is allowed to transition to:
All other values reserved
7:4
Speed Allowed (SPD)—R/W. Indicates the highest allowable speed of the interface.
This speed is limited by the CAP.ISS (ABAR+00h:bit 23:20) field.
All other values reserved.
The PCH Supports Generation 1 communication rates (1.5 Gb/s) and Gen 2 rates
(3.0 Gb/s).
3:0
Device Detection Initialization (DET)—R/W. Controls the PCH’s device detection
and interface initialization.
All other values reserved.
When this field is written to a 1h, the PCH initiates COMRESET and starts the
initialization process. When the initialization is complete, this field shall remain 1h until
set to another value by software.
This field may only be changed to 1h or 4h when PxCMD.ST is 0. Changing this field
while the PCH is running results in undefined behavior.
Value Description
0h No interface restrictions
1h Transitions to the PARTIAL state disabled
2h Transitions to the SLUMBER state disabled
3h Transitions to both PARTIAL and SLUMBER states disabled
Value Description
0h No speed negotiation restrictions
1h Limit speed negotiation to Generation 1 communication rate
2h Limit speed negotiation to Generation 2 communication rate
Value Description
0h No device detection or initialization action requested
1h
Perform interface communication initialization sequence to establish
communication. This is functionally equivalent to a hard reset and
results in the interface being reset and communications re-initialized
4h Disable the Serial ATA interface and put Phy in offline mode
Datasheet 607
SATA Controller Registers (D31:F2)
14.3.2.3 PxSERR—Serial ATA Error Register (D31:F2)
Address Offset: Attribute: R/WC
Default Value: 00000000h Size: 32 bits
SDATA when SINDx.RIDX is 02h. Bits 26:16 of this register contain diagnostic error
information for use by diagnostic software in validating correct operation or isolating
failure modes. Bits 11:0 contain error information used by host software in determining
the appropriate response to the error condition. If one or more of bits 11:8 of this
register are set, the controller will stop the current transfer.
Bit Description
31:27 Reserved
26
Exchanged (X): When set to one, this bit indicates that a change in device presence has
been detected since the last time this bit was cleared. This bit shall always be set to 1
anytime a COMINIT signal is received. This bit is reflected in the P0IS.PCS bit.
25 Unrecognized FIS Type (F): Indicates that one or more FISs were received by the
Transport layer with good CRC, but had a type field that was not recognized.
24
Transport state transition error (T): Indicates that an error has occurred in the
transition from one state to another within the Transport layer since the last time this bit
was cleared.
23
Link Sequence Error (S): Indicates that one or more Link state machine error
conditions was encountered. The Link Layer state machine defines the conditions under
which the link layer detects an erroneous transition.
22
Handshake (H). Indicates that one or more R_ERR handshake response was received in
response to frame transmission. Such errors may be the result of a CRC error detected by
the recipient, a disparity or 8b/10b decoding error, or other error condition leading to a
negative handshake on a transmitted frame.
21 CRC Error (C). Indicates that one or more CRC errors occurred with the Link Layer.
20 Disparity Error (D). This field is not used by AHCI.
19 10b to 8b Decode Error (B). Indicates that one or more 10b to 8b decoding errors
occurred.
18 Comm Wake (W). Indicates that a Comm Wake signal was detected by the Phy.
17 Phy Internal Error (I). Indicates that the Phy detected some internal error.
16
PhyRdy Change (N): When set to 1, this bit indicates that the internal PhyRdy signal
changed state since the last time this bit was cleared. In the PCH, this bit will be set when
PhyRdy changes from a 0 -> 1 or a 1 -> 0. The state of this bit is then reflected in the
PxIS.PRCS interrupt status bit and an interrupt will be generated if enabled. Software
clears this bit by writing a 1 to it.
15:12 Reserved
11 Internal Error (E). The SATA controller failed due to a master or target abort when
attempting to access system memory.
10
Protocol Error (P). A violation of the Serial ATA protocol was detected.
NOTE: PCH does not set this bit for all protocol violations that may occur on the SATA
link.
9
Persistent Communication or Data Integrity Error (C). A communication error that
was not recovered occurred that is expected to be persistent. Persistent communications
errors may arise from faulty interconnect with the device, from a device that has been
removed or has failed, or a number of other causes.
8Transient Data Integrity Error (T): A data integrity error occurred that was not
recovered by the interface.
7:2 Reserved
1
Recovered Communications Error (M). Communications between the device and host
was temporarily lost but was re-established. This can arise from a device temporarily
being removed, from a temporary loss of Phy synchronization, or from other causes and
may be derived from the PhyNRdy signal between the Phy and Link layers.
0Recovered Data Integrity Error (I). A data integrity error occurred that was
recovered by the interface through a retry operation or other recovery action.
SATA Controller Registers (D31:F2)
608 Datasheet
14.4 AHCI Registers (D31:F2)
Note: These registers are AHCI-specific and available when the PCH is properly configured.
The Serial ATA Status, Control, and Error registers are special exceptions and may be
accessed on all PCH components if properly configured; see Section 14.3 for details.
The memory mapped registers within the SATA controller exist in non-cacheable
memory space. Additionally, locked accesses are not supported. If software attempts to
perform locked transactions to the registers, indeterminate results may occur. Register
accesses shall have a maximum size of 64-bits; 64-bit access must not cross an 8-byte
alignment boundary. All memory registers are reset by Function Level Reset unless
specified otherwise.
The registers are broken into two sections—generic host control and port control. The
port control registers are the same for all ports, and there are as many registers banks
as there are ports.
Table 14-3. AHCI Register Address Map
ABAR + Offset Mnemonic Register
00–1Fh GHC Generic Host Control
20h–FFh Reserved
100h–17Fh P0PCR Port 0 port control registers
180h–1FFh P1PCR Port 1 port control registers
200h–27Fh P2PCR
Port 2 port control registers (Desktop Only)
Registers are not available and software must not read or write
registers. (Mobile Only)
280h–2FFh P3PCR
Port 3 port control registers (Desktop Only)
Registers are not available and software must not read or write
registers. (Mobile Only)
300h–37Fh P4PCR Port 4 port control registers
380h–3FFh P5PCR Port 5 port control registers
400h–47Fh P6PCR Port 6 port control registers
480h–4FFh P7PCR Port 7 port control registers
Datasheet 609
SATA Controller Registers (D31:F2)
14.4.1 AHCI Generic Host Control Registers (D31:F2)
14.4.1.1 CAP—Host Capabilities Register (D31:F2)
Address Offset: ABAR + 00h–03h Attribute: R/WO, RO
Default Value: FF22FFC2h (Desktop) Size: 32 bits
DE127F03h (Mobile)
Function Level Reset: No
All bits in this register that are R/WO are reset only by PLTRST#.
Table 14-4. Generic Host Controller Register Address Map
ABAR +
Offset Mnemonic Register Default Type
00h–03h CAP Host Capabilities
FF22FFC2h
(desktop)
DE127F03h
(mobile)
R/WO, RO
04h–07h GHC Global PCH Control 00000000h R/W, RO
08h–0Bh IS Interrupt Status 00000000h R/WC
0Ch–0Fh PI Ports Implemented 00000000h R/WO, RO
10h–13h VS AHCI Version 00010200h RO
14h–17h CCC_CTL Command Completion Coalescing
Control 00010121h R/W, RO
18h–1Bh CCC_PORTS Command Completion Coalescing
Ports 00000000h R/W
1Ch–1Fh EM_LOC Enclosure Management Location 01600002h RO
20h–23h EM_CTRL Enclosure Management Control 07010000h R/W, R/WO,
RO
70h–73h VS AHCI Version 00010000h RO
A0h–A3h VSP Vendor Specific 00000001h RO, R/WO
C8h–C9h RSTF Intel® RST Feature Capabilities 003Fh RWO
Bit Description
31
Supports 64-bit Addressing (S64A)—RO. Indicates that the SATA controller can
access 64-bit data structures. The 32-bit upper bits of the port DMA Descriptor, the
PRD Base, and each PRD entry are read/write.
30
Supports Command Queue Acceleration (SCQA)—RO. Hardwired to 1 to
indicate that the SATA controller supports SATA command queuing using the DMA
Setup FIS. The PCH handles DMA Setup FISes natively, and can handle auto-
activate optimization through that FIS.
29 Supports SNotification Register (SSNTF)—RO. The PCH SATA Controller does not
support the SNotification register.
28
Supports Interlock Switch (SIS)—R/WO. Indicates whether the SATA controller
supports interlock switches on its ports for use in Hot Plug operations. This value is
loaded by platform BIOS prior to OS initialization.
If this bit is set, BIOS must also map the SATAGP pins to the SATA controller
through GPIO space.
SATA Controller Registers (D31:F2)
610 Datasheet
27
Supports Staggered Spin-up (SSS)—R/WO. Indicates whether the SATA
controller supports staggered spin-up on its ports, for use in balancing power
spikes. This value is loaded by platform BIOS prior to OS initialization.
0 = Staggered spin-up not supported.
1 = Staggered spin-up supported.
26
Supports Aggressive Link Power Management (SALP)R/WO.
0 = Software shall treat the PxCMD.ALPE and PxCMD.ASP bits as reserved.
1 = The SATA controller supports auto-generating link requests to the partial or
slumber states when there are no commands to process.
25 Supports Activity LED (SAL)—RO. Indicates that the SATA controller supports a
single output pin (SATALED#) which indicates activity.
24
Supports Command List Override (SCLO)—R/WO. When set to 1, indicates that
the Controller supports the PxCMD.CLO bit and its associated function. When
cleared to 0, the Controller is not capable of clearing the BSY and DRQ bits in the
Status register to issue a software reset if these bits are still set from a previous
operation.
23:20
Interface Speed Support (ISS)—R/WO. Indicates the maximum speed the SATA
controller can support on its ports.
2h =3.0 Gb/s.
19 Supports Non-Zero DMA Offsets (SNZO)—RO. Reserved, as per the AHCI Revision
1.2 specification
18
Supports AHCI Mode Only (SAM)—RO. The SATA controller may optionally
support AHCI access mechanism only.
0 = SATA controller supports both IDE and AHCI Modes
1 = SATA controller supports AHCI Mode Only
17:16 BIOS must set these bits to 00.
15 PIO Multiple DRQ Block (PMD)—RO. The SATA controller supports PIO Multiple
DRQ Command Block
14 Slumber State Capable (SSC)—R/WO. The SATA controller supports the slumber
state.
13 Partial State Capable (PSC)—R/WO. The SATA controller supports the partial
state.
12:8 Number of Command Slots (NCS)—RO. Hardwired to 1Fh to indicate support for
32 slots.
7
Command Completion Coalescing Supported (CCCS)—R/WO.
0 = Command Completion Coalescing Not Supported
1 = Command Completion Coalescing Supported
6
Enclosure Management Supported (EMS)—R/WO.
0 = Enclosure Management Not Supported
1 = Enclosure Management Supported
5
Supports External SATA (SXS)—R/WO.
0 = External SATA is not supported on any ports
1 = External SATA is supported on one or more ports
When set, SW can examine each SATA port’s Command Register (PxCMD) to
determine which port is routed externally.
4:0
Number of Ports (NPS)—RO. Indicates number of supported ports. Note that the
number of ports indicated in this field may be more than the number of ports
indicated in the PI (ABAR + 0Ch) register.
Bit Description
Datasheet 611
SATA Controller Registers (D31:F2)
14.4.1.2 GHC—Global PCH Control Register (D31:F2)
Address Offset: ABAR + 04h–07h Attribute: R/W, RO
Default Value: 00000000h Size: 32 bits
Bit Description
31
AHCI Enable (AE)—R/W. When set, this bit indicates that an AHCI driver is loaded and
the controller will be talked to using AHCI mechanisms. This can be used by an PCH
that supports both legacy mechanisms (such as SFF-8038i) and AHCI to know when the
controller will not be talked to as legacy.
0 = Software will communicate with the PCH using legacy mechanisms.
1 = Software will communicate with the PCH using AHCI. The PCH will not have to allow
command processing using both AHCI and legacy mechanisms.
Software shall set this bit to 1 before accessing other AHCI registers.
30:3 Reserved
2
MSI Revert to Single Message (MRSM)—RO: When set to 1 by hardware, this bit
indicates that the host controller requested more than one MSI vector but has reverted
to using the first vector only. When this bit is cleared to 0, the Controller has not
reverted to single MSI mode (that is, hardware is already in single MSI mode, software
has allocated the number of messages requested, or hardware is sharing interrupt
vectors if MC.MME < MC.MMC).
"MC.MSIE = 1 (MSI is enabled)
"MC.MMC > 0 (multiple messages requested)
"MC.MME > 0 (more than one message allocated)
"MC.MME!= MC.MMC (messages allocated not equal to number requested)
When this bit is set to 1, single MSI mode operation is in use and software is
responsible for clearing bits in the IS register to clear interrupts.
This bit shall be cleared to 0 by hardware when any of the four conditions stated is
false. This bit is also cleared to 0 when MC.MSIE = 1 and MC.MME = 0h. In this case,
the hardware has been programmed to use single MSI mode, and is not "reverting" to
that mode.
For PCH, the Controller shall always revert to single MSI mode when the number of
vectors allocated by the host is less than the number requested. This bit is ignored
when GHC.HR = 1.
1
Interrupt Enable (IE)—R/W. This global bit enables interrupts from the PCH.
0 = All interrupt sources from all ports are disabled.
1 = Interrupts are allowed from the AHCI controller.
0
Controller Reset (HR)—R/W. Resets the PCH AHCI controller.
0 = No effect
1 = When set by software, this bit causes an internal reset of the PCH AHCI controller.
All state machines that relate to data transfers and queuing return to an idle
condition, and all ports are re-initialized using COMRESET.
NOTE: For further details, see Section 12.3.3 of the Serial ATA Advanced Host
Controller Interface specification.
SATA Controller Registers (D31:F2)
612 Datasheet
14.4.1.3 IS—Interrupt Status Register (D31:F2)
Address Offset: ABAR + 08h0Bh Attribute: R/WC
Default Value: 00000000h Size: 32 bits
This register indicates which of the ports within the controller have an interrupt pending
and require service.
Bit Description
31:9 Reserved. Returns 0.
8
(Desktop
Only)
Coalescing Interrupt Pending Status (CIPS)—R/WC.
0 = No interrupt pending.
1 = A command completion coalescing interrupt has been generated.
7
Interrupt Pending Status Port[7] (IPS[6])—R/WC.
0 = No interrupt pending.
1 = Port 7 has an interrupt pending. Software can use this information to determine
which ports require service after an interrupt.
6
Interrupt Pending Status Port[6] (IPS[6])—R/WC.
0 = No interrupt pending.
1 = Port 6 has an interrupt pending. Software can use this information to determine
which ports require service after an interrupt.
5
Interrupt Pending Status Port[5] (IPS[5])—R/WC.
0 = No interrupt pending.
1 = Port 5 has an interrupt pending. Software can use this information to determine
which ports require service after an interrupt.
4
Interrupt Pending Status Port[4] (IPS[4])—R/WC.
0 = No interrupt pending.
1 = Port 4 has an interrupt pending. Software can use this information to determine
which ports require service after an interrupt.
3
(Desktop
Only)
Interrupt Pending Status Port[3] (IPS[3])—R/WC.
0 = No interrupt pending.
1 = Port 3 has an interrupt pending. Software can use this information to determine
which ports require service after an interrupt.
2
(Desktop
Only)
Interrupt Pending Status Port[2] (IPS[2])—R/WC.
0 = No interrupt pending.
1 = Port 2 has an interrupt pending. Software can use this information to determine
which ports require service after an interrupt.
3:2
(Mobile
Only)
Reserved. Returns 0.
1
Interrupt Pending Status Port[1] (IPS[1])—R/WC.
0 = No interrupt pending.
1 = Port 1has an interrupt pending. Software can use this information to determine
which ports require service after an interrupt.
0
Interrupt Pending Status Port[0] (IPS[0])—R/WC.
0 = No interrupt pending.
1 = Port 0 has an interrupt pending. Software can use this information to determine
which ports require service after an interrupt.
Datasheet 613
SATA Controller Registers (D31:F2)
14.4.1.4 PI—Ports Implemented Register (D31:F2)
Address Offset: ABAR + 0Ch–0Fh Attribute: R/WO, RO
Default Value: 00000000h Size: 32 bits
Function Level Reset: No
This register indicates which ports are exposed to the PCH. It is loaded by platform
BIOS. It indicates which ports that the device supports are available for software to
use. For ports that are not available, software must not read or write to registers within
that port.
Bit Description
31:6 Reserved. Returns 0.
5
Ports Implemented Port 5 (PI5)—R/WO.
0 = The port is not implemented.
1 = The port is implemented.
This bit is read-only 0 if MAP.SC = 0 or SCC = 01h.
4
Ports Implemented Port 4 (PI4)—R/WO.
0 = The port is not implemented.
1 = The port is implemented.
This bit is read-only 0 if MAP.SC = 0 or SCC = 01h.
3
(Mobile
Only)
Ports Implemented Port 3 (PI3)—RO.
0 = The port is not implemented.
3
Ports Implemented Port 3 (PI3)—R/WO.
0 = The port is not implemented.
1 = The port is implemented.
2
(Mobile
Only)
Ports Implemented Port 2 (PI2)—RO.
0 = The port is not implemented.
2
Ports Implemented Port 2 (PI2)—R/WO.
0 = The port is not implemented.
1 = The port is implemented.
1
Ports Implemented Port 1 (PI1)—R/WO.
0 = The port is not implemented.
1 = The port is implemented.
0
Ports Implemented Port 0 (PI0)—R/WO.
0 = The port is not implemented.
1 = The port is implemented.
SATA Controller Registers (D31:F2)
614 Datasheet
14.4.1.5 VS—AHCI Version Register (D31:F2)
Address Offset: ABAR + 10h–13h Attribute: RO
Default Value: 00010200h Size: 32 bits
This register indicates the major and minor version of the AHCI specification. It is BCD
encoded. The upper two bytes represent the major version number, and the lower two
bytes represent the minor version number. Example: Version 3.12 would be
represented as 00030102h. The current version of the specification is 1.20
(00010200h).
14.4.1.6 CCC_CTL—Command Completion Coalescing Control
Register (D31:F2)
Address Offset: ABAR + 14h–17h Attribute: R/W, RO
Default Value: 00010131h Size: 32 bits
This register is used to configure the command coalescing feature. This register is
reserved if command coalescing is not supported (CAP_CCCS = 0).
Bit Description
31:16 Major Version Number (MJR)—RO. Indicates the major version is 1
15:0 Minor Version Number (MNR)—RO. Indicates the minor version is 20.
Bit Description
31:16
Timeout Value (TV)—R/W. The timeout value is specified in 10 microsecond
intervals. hbaCCC_Timer is loaded with this timeout value. hbaCCC_Timer is only
decremented when commands are outstanding on the selected ports. The Controller
will signal a CCC interrupt when hbaCCC_Timer has decremented to 0. The
hbaCCC_Timer is reset to the timeout value on the assertion of each CCC interrupt. A
timeout value of 0 is invalid.
15:8
Command Completions (CC)—R/W. Specifies the number of command completions
that are necessary to cause a CCC interrupt. The Controller has an internal command
completion counter, hbaCCC_CommandsComplete.
hbaCCC_CommandsComplete is incremented by one each time a selected port has a
command completion. When hbaCCC_CommandsComplete is equal to the command
completions value, a CCC interrupt is signaled. The internal command completion
counter is reset to ‘0’ on the assertion of each CCC interrupt.
7:3
Interrupt (INT)—RO. Specifies the interrupt used by the CCC feature. This interrupt
must be marked as unused in the AHCI Ports Implemented memory register by the
corresponding bit being set to 0. Thus, the CCC_interrupt corresponds to the interrupt
for an unimplemented port on the controller. When a CCC interrupt occurs, the
IS[INT] bit shall be asserted to 1 regardless of whether PIRQ interrupt or MSI is used.
Note that in MSI, CC interrupt may share an interrupt vector with other ports. For
example, if the number of message allocated is 4, then CCC interrupt share interrupt
vector 3 along with port 3, 4, and 5 but IS[6] shall get set.
2:1 Reserved
0
Enable (EN)—R/W.
0 = The command completion coalescing feature is disabled and no CCC interrupts are
generated
1 = The command completion coalescing feature is enabled and CCC interrupts may
be generated based on timeout or command completion conditions.
Software shall only change the contents of the TV and CC fields when EN is cleared to
0. On transition of this bit from 0 to 1, any updated values for the TV and CC fields
shall take effect.
Datasheet 615
SATA Controller Registers (D31:F2)
14.4.1.7 CCC_Ports—Command Completion Coalescing Ports
Register (D31:F2)
Address Offset: ABAR + 18h–1Bh Attribute: R/W
Default Value: 00000000h Size: 32 bits
This register is used to specify the ports that are coalesced as part of the CCC feature
when CCC_CTL.EN = 1. This register is reserved if command coalescing is not
supported (CAP_CCCS = 0).
14.4.1.8 EM_LOC—Enclosure Management Location Register (D31:F2)
Address Offset: ABAR + 1Ch–1Fh Attribute: RO
Default Value: 01600002h Size: 32 bits
This register identifies the location and size of the enclosure management message
buffer. This register is reserved if enclosure management is not supported (that is,
CAP.EMS = 0).
Bit Description
31:0
Ports (PRT)—R/W.
0 = The port is not part of the command completion coalescing feature.
1 = The corresponding port is part of the command completion coalescing feature.
Bits set to 1 in this register must also have the corresponding bit set to 1 in the
Ports Implemented register.
Bits set to 1 in this register must also have the corresponding bit set to 1 in the Ports
Implemented register. An updated value for this field shall take effect within one timer
increment (1 millisecond).
Bit Description
31:16 Offset (OFST)—RO. The offset of the message buffer in Dwords from the beginning
of the ABAR.
15:0
Buffer Size (SZ)—RO. Specifies the size of the transmit message buffer area in
Dwords. The PCH SATA controller only supports transmit buffer.
A value of 0 is invalid.
SATA Controller Registers (D31:F2)
616 Datasheet
14.4.1.9 EM_CTRL—Enclosure Management Control Register (D31:F2)
Address Offset: ABAR + 20h–23h Attribute: R/W, R/WO, RO
Default Value: 07010000h Size: 32 bits
This register is used to control and obtain status for the enclosure management
interface. This register includes information on the attributes of the implementation,
enclosure management messages supported, the status of the interface, whether any
message are pending, and is used to initiate sending messages. This register is
reserved if enclosure management is not supported (CAP_EMS = 0).
Bit Description
31:27 Reserved
26
Activity LED Hardware Driven (ATTR.ALHD)—R/WO.
1 = The SATA controller drives the activity LED for the LED message type in hardware
and does not use software for this LED.
The host controller does not begin transmitting the hardware based activity signal
until after software has written CTL.TM=1 after a reset condition.
25
Transmit Only (ATTR.XMT)—RO.
0 = The SATA controller supports transmitting and receiving messages.
1 = The SATA controller only supports transmitting messages and does not support
receiving messages.
24
Single Message Buffer (ATTR.SMB)—RO.
0 = There are separate receive and transmit buffers such that unsolicited messages
could be supported.
1 = The SATA controller has one message buffer that is shared for messages to
transmit and messages received. Unsolicited receive messages are not supported
and it is software’s responsibility to manage access to this buffer.
23:20 Reserved
19 SGPIO Enclosure Management Messages (SUPP.SGPIO)—RO.
1 = The SATA controller supports the SGPIO register interface message type.
18 SES-2 Enclosure Management Messages (SUPP.SES2)—RO.
1 = The SATA controller supports the SES-2 message type.
17 SAF-TE Enclosure Management Messages (SUPP.SAFTE)—RO.
1 = The SATA controller supports the SAF-TE message type.
16 LED Message Types (SUPP.LED)—RO.
1 = The SATA controller supports the LED message type.
15:10 Reserved
9
Reset (RST):R/W.
0 = A write of 0 to this bit by software will have no effect.
1 = When set by software, The SATA controller shall reset all enclosure management
message logic and take all appropriate reset actions to ensure messages can be
transmitted / received after the reset. After the SATA controller completes the
reset operation, the SATA controller shall set the value to 0.
8
Transmit Message (CTL.TM)—R/W.
0 = A write of 0 to this bit by software will have no effect.
1 = When set by software, The SATA controller shall transmit the message contained
in the message buffer. When the message is completely sent, the SATA controller
shall set the value to 0.
Software shall not change the contents of the message buffer while CTL.TM is set to 1.
7:1 Reserved
0Message Received (STS.MR):—RO. Message Received is not supported in the PCH.
Datasheet 617
SATA Controller Registers (D31:F2)
14.4.1.10 VS—AHCI Version Register (D31:F2)
Address Offset: ABAR + 70h–73h Attribute: RO
Default Value: 00010000h Size: 32 bits
This register indicates the major and minor version of the NVMHCI specification. It is
BCD encoded. The upper two bytes represent the major version number, and the lower
two bytes represent the minor version number. Example: Version 3.12 would be
represented as 00030102h. The current version of the specification is 1.0
(00010000h).
14.4.1.11 VSP—Vendor Specific Register (D31:F2)
Address Offset: ABAR + A0h–A3h Attribute: RO, RWO
Default Value: 00000001h Size: 32 bits
14.4.1.12 RSTF—Intel® RST Feature Capabilities Register
Address Offset: ABAR + C8h–C9h Attribute: RWO
Default Value: 003Fh Size: 16 bits
No hardware action is taken on this register. This register is needed for the Intel®
Rapid Storage Technology software. These bits are set by BIOS to request the feature
from the appropriate Intel Rapid Storage Technology software.
Bit Description
31:16 Major Version Number (MJR)—RO. Indicates the major version is 1
15:0 Minor Version Number (MNR)—RO. Indicates the minor version is 0.
Bit Description
31:1 Reserved
0
Supports Low Power Device Detection (SLPD)—RWO
Indicates whether SATA power management and device hot (un)pulg is supported.
0 = Not supported.
1 = Supported.
Bit Description
15:12 Reserved
11:10
OROM UI Normal Delay (OUD)—R/WO. The values of these bits specify the delay of
the OROM UI Splash Screen in a normal status.
00 = 2 Seconds (Default)
01 = 4 Seconds
10 = 6 Seconds
11 = 8 Seconds
If bit 5 = 0b, these values will be disregarded.
9 Reserved
SATA Controller Registers (D31:F2)
618 Datasheet
8
Intel® RRT Only on eSATA (ROES)—R/WO
Indicates the request that only Intel® Rapid Recovery Technology (RRT) volumes can
can span internal and external SATA (eSATA). If not set, any RAID volume can span
internal and external SATA.
0 = Disabled
1 = Enabled
7 Reserved
6
HDD Unlock (HDDLK)—RWO
Indicates the requested status of HDD password unlock in the OS.
0 = Disabled
1 = Enabled
5
Intel RST OROM UI (RSTOROMUI)—R/WO. Indicates the requested status of the
Intel® RST OROM UI display.
0 = The Intel RST OROM UI and banner are not displayed if all disks and RAID volumes
have a normal status.
1 = The Intel RST OROM UI is displayed during each boot.
4
Intel® RRT Enable (RSTE)—RWO
Indicates the requested status of the Intel® Rapid Recovery Technology Support
0 = Disabled
1 = Enabled
3
RAID 5 Enable (R5E)—RWO
Indicates the requested status of RAID 5 Support
0 = Disabled
1 = Enabled
2
RAID 10 Enable (R10E)—RWO
Indicates the requested status of RAID 10 Support
0 = Disabled
1 = Enabled
1
RAID 1 Enable (R1E)—RWO
Indicates the requested status of RAID 1 Support
0 = Disabled
1 = Enabled
0
RAID 0 Enable (R0E)—RWO
Indicates the requested status of RAID 0 Support
0 = Disabled
1 = Enabled
Bit Description
Datasheet 619
SATA Controller Registers (D31:F2)
14.4.2 Port Registers (D31:F2)
Ports not available will result in the corresponding Port DMA register space being
reserved. The controller shall ignore writes to the reserved space on write cycles and
shall return 0 on read cycle accesses to the reserved location.
Table 14-5. Port [5:0] DMA Register Address Map (Sheet 1 of 4)
ABAR +
Offset Mnemonic Register
100h–103h P0CLB Port 0 Command List Base Address
104h–107h P0CLBU Port 0 Command List Base Address Upper 32-Bits
108h–10Bh P0FB Port 0 FIS Base Address
10Ch–10Fh P0FBU Port 0 FIS Base Address Upper 32-Bits
110h–113h P0IS Port 0 Interrupt Status
114h–117h P0IE Port 0 Interrupt Enable
118h–11Bh P0CMD Port 0 Command
11Ch–11Fh Reserved
120h–123h P0TFD Port 0 Task File Data
124h–127h P0SIG Port 0 Signature
128h–12Bh P0SSTS Port 0 Serial ATA Status
12Ch–12Fh P0SCTL Port 0 Serial ATA Control
130h–133h P0SERR Port 0 Serial ATA Error
134h–137h P0SACT Port 0 Serial ATA Active
138h–13Bh P0CI Port 0 Command Issue
13Ch–17Fh Reserved
180h–183h P1CLB Port 1 Command List Base Address
184h–187h P1CLBU Port 1 Command List Base Address Upper 32-Bits
188h–18Bh P1FB Port 1 FIS Base Address
18Ch–18Fh P1FBU Port 1 FIS Base Address Upper 32-Bits
190h–193h P1IS Port 1 Interrupt Status
194h–197h P1IE Port 1 Interrupt Enable
198h–19Bh P1CMD Port 1 Command
19Ch–19Fh Reserved
1A0h–1A3h P1TFD Port 1 Task File Data
1A4h–1A7h P1SIG Port 1 Signature
1A8h–1ABh P1SSTS Port 1 Serial ATA Status
1ACh–1AFh P1SCTL Port 1 Serial ATA Control
1B0h–1B3h P1SERR Port 1 Serial ATA Error
1B4h–1B7h P1SACT Port 1 Serial ATA Active
1B8h–1BBh P1CI Port 1 Command Issue
1BCh–1FFh Reserved
SATA Controller Registers (D31:F2)
620 Datasheet
200h–27Fh
(Mobile Only)
Reserved
Registers are not available and software must not read from or
write to registers.
200h–203h P2CLB Port 2 Command List Base Address
204h–207h P2CLBU Port 2 Command List Base Address Upper 32-Bits
208h–20Bh P2FB Port 2 FIS Base Address
20Ch–20Fh P2FBU Port 2 FIS Base Address Upper 32-Bits
210h–213h P2IS Port 2 Interrupt Status
214h–217h P2IE Port 2 Interrupt Enable
218h–21Bh P2CMD Port 2 Command
21Ch–21Fh Reserved
220h–223h P2TFD Port 2 Task File Data
224h–227h P2SIG Port 2 Signature
228h–22Bh P2SSTS Port 2 Serial ATA Status
22Ch–22Fh P2SCTL Port 2 Serial ATA Control
230h–233h P2SERR Port 2 Serial ATA Error
234h–237h P2SACT Port 2 Serial ATA Active
238h–23Bh P2CI Port 2 Command Issue
23Ch–27Fh Reserved
280h–2FFh
(Mobile Only)
Reserved
Registers are not available and software must not read from or
write to registers.
280h–283h P3CLB Port 3 Command List Base Address
284h–287h P3CLBU Port 3 Command List Base Address Upper 32-Bits
288h–28Bh P3FB Port 3 FIS Base Address
28Ch–28Fh P3FBU Port 3 FIS Base Address Upper 32-Bits
290h–293h P3IS Port 3 Interrupt Status
294h–297h P3IE Port 3 Interrupt Enable
298h–29Bh P3CMD Port 3 Command
29Ch–29Fh Reserved
2A0h–2A3h P3TFD Port 3 Task File Data
2A4h–2A7h P3SIG Port 3 Signature
2A8h–2ABh P3SSTS Port 3 Serial ATA Status
2ACh–2AFh P3SCTL Port 3 Serial ATA Control
2B0h–2B3h P3SERR Port 3 Serial ATA Error
2B4h–2B7h P3SACT Port 3 Serial ATA Active
2B8h–2BBh P3CI Port 3 Command Issue
2BCh–2FFh Reserved
Table 14-5. Port [5:0] DMA Register Address Map (Sheet 2 of 4)
ABAR +
Offset Mnemonic Register
Datasheet 621
SATA Controller Registers (D31:F2)
300h–303h P4CLB Port 4 Command List Base Address
304h–307h P4CLBU Port 4 Command List Base Address Upper 32-Bits
308h–30Bh P4FB Port 4 FIS Base Address
30Ch–30Fh P4FBU Port 4 FIS Base Address Upper 32-Bits
310h–313h P4IS Port 4 Interrupt Status
314h–317h P4IE Port 4 Interrupt Enable
318h–31Bh P4CMD Port 4 Command
31Ch–31Fh Reserved
320h–323h P4TFD Port 4 Task File Data
324h–327h P4SIG Port 4 Signature
328h–32Bh P4SSTS Port 4 Serial ATA Status
32Ch–32Fh P4SCTL Port 4 Serial ATA Control
330h–333h P4SERR Port 4 Serial ATA Error
334h–337h P4SACT Port 4 Serial ATA Active
338h–33Bh P4CI Port 4 Command Issue
340h–341h P4FBSI Port 4 FIS-Based Switching Control
342h–37Fh Reserved
380h–383h P5CLB Port 5 Command List Base Address
384h–387h P5CLBU Port 5 Command List Base Address Upper 32-Bits
388h–38Bh P5FB Port 5 FIS Base Address
38Ch–38Fh P5FBU Port 5 FIS Base Address Upper 32-Bits
390h–393h P5IS Port 5 Interrupt Status
394h–397h P5IE Port 5 Interrupt Enable
398h–39Bh P5CMD Port 5 Command
39Ch–39Fh Reserved
3A0h–3A3h P5TFD Port 5 Task File Data
3A4h–3A7h P5SIG Port 5 Signature
3A8h–3ABh P5SSTS Port 5 Serial ATA Status
3ACh–3AFh P5SCTL Port 5 Serial ATA Control
3B0h–3B3h P5SERR Port 5 Serial ATA Error
3B4h–3B7h P5SACT Port 5 Serial ATA Active
3B8h–3BBh P5CI Port 5 Command Issue
3C0h–3C3h P5FBSI Port 5 FIS-Based Switching Control
3C4h–3FFh Reserved
400h–403h P6CLB Port 6 Command List Base Address
404h–407h P6CLBU Port 6 Command List Base Address Upper 32-Bits
408h–40Bh P6FB Port 6 FIS Base Address
Table 14-5. Port [5:0] DMA Register Address Map (Sheet 3 of 4)
ABAR +
Offset Mnemonic Register
SATA Controller Registers (D31:F2)
622 Datasheet
40Ch–40Fh P6FBU Port 6 FIS Base Address Upper 32-Bits
410h–413h P6IS Port 6 Interrupt Status
414h–417h P6IE Port 6 Interrupt Enable
418h–41Bh P6CMD Port 6 Command
41Ch–41Fh Reserved
420h–423h P6TFD Port 6 Task File Data
424h–427h P6SIG Port 6 Signature
428h–42Bh P6SSTS Port 6 Serial ATA Status
42Ch–42Fh P6SCTL Port 6 Serial ATA Control
430h–433h P6SERR Port 6 Serial ATA Error
434h–437h Reserved
438h–43Bh P6CI Port 6Command Issue
43Ch–47Fh Reserved
480h–483h P7CLB Port 7 Command List Base Address
484h–487h P7CLBU Port 7 Command List Base Address Upper 32-Bits
488h–48Fh Reserved
490h–493h P7IS Port 7 Interrupt Status
494h–497h P7IE Port 7 Interrupt Enable
498h–49Bh P7CMD Port 7 Command
49Ch–4A3h Reserved
4A4h–4A7h P7SIG Port 7 Signature
4A8h–4B7h P7SSTS Reserved
4B8h–4BBh P7CI Port 7 Command Issue
4BCh–FFFh Reserved
Table 14-5. Port [5:0] DMA Register Address Map (Sheet 4 of 4)
ABAR +
Offset Mnemonic Register
Datasheet 623
SATA Controller Registers (D31:F2)
14.4.2.1 PxCLB—Port [5:0] Command List Base Address Register
(D31:F2)
Address Offset: Port 0: ABAR + 100h Attribute: R/W
Port 1: ABAR + 180h
Port 2: ABAR + 200h (Desktop Only)
Port 3: ABAR + 280h (Desktop Only)
Port 4: ABAR + 300h
Port 5: ABAR + 380h
Port 6: ABAR + 400h
Default Value: Undefined Size: 32 bits
14.4.2.2 PxCLBU—Port [5:0] Command List Base Address Upper
32-Bits Register (D31:F2)
Address Offset: Port 0: ABAR + 104h Attribute: R/W
Port 1: ABAR + 184h
Port 2: ABAR + 204h (Desktop Only)
Port 3: ABAR + 284h (Desktop Only)
Port 4: ABAR + 304h
Port 5: ABAR + 384h
Port 6: ABAR + 404h
Default Value: Undefined Size: 32 bits
Bit Description
31:10
Command List Base Address (CLB)—R/W. Indicates the 32-bit base for the
command list for this port. This base is used when fetching commands to execute. The
structure pointed to by this address range is 1 KB in length. This address must be 1-KB
aligned as indicated by bits 31:10 being read/write.
Note that these bits are not reset on a Controller reset.
9:0 Reserved
Bit Description
31:0
Command List Base Address Upper (CLBU)—R/W. Indicates the upper 32-bits for
the command list base address for this port. This base is used when fetching
commands to execute.
Note that these bits are not reset on a Controller reset.
SATA Controller Registers (D31:F2)
624 Datasheet
14.4.2.3 PxFB—Port [5:0] FIS Base Address Register (D31:F2)
Address Offset: Port 0: ABAR + 108h Attribute: R/W
Port 1: ABAR + 188h
Port 2: ABAR + 208h (Desktop Only)
Port 3: ABAR + 288h (Desktop Only)
Port 4: ABAR + 308h
Port 5: ABAR + 388h
Port 6: ABAR + 408h
Default Value: Undefined Size: 32 bits
14.4.2.4 PxFBU—Port [5:0] FIS Base Address Upper 32-Bits
Register (D31:F2)
Address Offset: Port 0: ABAR + 10Ch Attribute: R/W
Port 1: ABAR + 18Ch
Port 2: ABAR + 20Ch (Desktop Only)
Port 3: ABAR + 28Ch (Desktop Only)
Port 4: ABAR + 30Ch
Port 5: ABAR + 38Ch
Port 6: ABAR + 40Ch
Default Value: Undefined Size: 32 bits
Bit Description
31:8
FIS Base Address (FB)—R/W. Indicates the 32-bit base for received FISes. The
structure pointed to by this address range is 256 bytes in length. This address must be
256-byte aligned, as indicated by bits 31:3 being read/write.
Note that these bits are not reset on a Controller reset.
7:0 Reserved
Bit Description
31:0
FIS Base Address Upper (FBU)—R/W. Indicates the upper 32-bits for the received
FIS base for this port.
Note that these bits are not reset on a Controller reset.
Datasheet 625
SATA Controller Registers (D31:F2)
14.4.2.5 PxIS—Port [5:0] Interrupt Status Register (D31:F2)
Address Offset: Port 0: ABAR + 110h Attribute: R/WC, RO
Port 1: ABAR + 190h
Port 2: ABAR + 210h (Desktop Only)
Port 3: ABAR + 290h (Desktop Only)
Port 4: ABAR + 310h
Port 5: ABAR + 390h
Port 6: ABAR + 410h
Default Value: 00000000h Size: 32 bits
Bit Description
31 Cold Port Detect Status (CPDS)—RO. Cold presence detect is not supported.
30 Task File Error Status (TFES)—R/WC. This bit is set whenever the status register is
updated by the device and the error bit (PxTFD.bit 0) is set.
29
Host Bus Fatal Error Status (HBFS)—R/WC. Indicates that the PCH encountered an
error that it cannot recover from due to a bad software pointer. In PCI, such an
indication would be a target or master abort.
28
Host Bus Data Error Status (HBDS)—R/WC. Indicates that the PCH encountered a
data error (uncorrectable ECC / parity) when reading from or writing to system
memory.
27 Interface Fatal Error Status (IFS)—R/WC. Indicates that the PCH encountered an
error on the SATA interface which caused the transfer to stop.
26 Interface Non-fatal Error Status (INFS)—R/WC. Indicates that the PCH
encountered an error on the SATA interface but was able to continue operation.
25 Reserved
24 Overflow Status (OFS)—R/WC. Indicates that the PCH received more bytes from a
device than was specified in the PRD table for the command.
23 Incorrect Port Multiplier Status (IPMS)—R/WC. The PCH SATA controller does not
support Port Multipliers.
22
PhyRdy Change Status (PRCS)—RO. When set to one, this bit indicates the internal
PhyRdy signal changed state. This bit reflects the state of PxSERR.DIAG.N. Unlike most
of the other bits in the register, this bit is RO and is only cleared when PxSERR.DIAG.N
is cleared.
Note that the internal PhyRdy signal also transitions when the port interface enters
partial or slumber power management states. Partial and slumber must be disabled
when Surprise Removal Notification is desired, otherwise the power management state
transitions will appear as false insertion and removal events.
21:8 Reserved
7
Device Interlock Status (DIS)—R/WC. When set, this bit indicates that a platform
interlock switch has been opened or closed, which may lead to a change in the
connection state of the device. This bit is only valid in systems that support an interlock
switch (CAP.SIS [ABAR+00:bit 28] set).
For systems that do not support an interlock switch, this bit will always be 0.
6
Port Connect Change Status (PCS)—RO. This bit reflects the state of
PxSERR.DIAG.X. (ABAR+130h/1D0h/230h/2D0h, bit 26) Unlike other bits in this
register, this bit is only cleared when PxSERR.DIAG.X is cleared.
0 = No change in Current Connect Status.
1 = Change in Current Connect Status.
5Descriptor Processed (DPS)—R/WC. A PRD with the I bit set has transferred all its
data.
SATA Controller Registers (D31:F2)
626 Datasheet
14.4.2.6 PxIE—Port [5:0] Interrupt Enable Register (D31:F2)
Address Offset: Port 0: ABAR + 114h Attribute: R/W, RO
Port 1: ABAR + 194h
Port 2: ABAR + 214h (Desktop Only)
Port 3: ABAR + 294h (Desktop Only)
Port 4: ABAR + 314h
Port 5: ABAR + 394h
Port 6: ABAR + 414h
Default Value: 00000000h Size: 32 bits
This register enables and disables the reporting of the corresponding interrupt to
system software. When a bit is set (1) and the corresponding interrupt condition is
active, then an interrupt is generated. Interrupt sources that are disabled (0) are still
reflected in the status registers.
4
Unknown FIS Interrupt (UFS)—RO. When set to 1, this bit indicates that an
unknown FIS was received and has been copied into system memory. This bit is cleared
to 0 by software clearing the PxSERR.DIAG.F bit to 0. Note that this bit does not
directly reflect the PxSERR.DIAG.F bit. PxSERR.DIAG.F is set immediately when an
unknown FIS is detected, whereas this bit is set when the FIS is posted to memory.
Software should wait to act on an unknown FIS until this bit is set to 1 or the two bits
may become out of sync.
3Set Device Bits Interrupt (SDBS)—R/WC. A Set Device Bits FIS has been received
with the I bit set and has been copied into system memory.
2DMA Setup FIS Interrupt (DSS)R/WC. A DMA Setup FIS has been received with
the I bit set and has been copied into system memory.
1
PIO Setup FIS Interrupt (PSS)—R/WC. A PIO Setup FIS has been received with the
I bit set, it has been copied into system memory, and the data related to that FIS has
been transferred.
0Device to Host Register FIS Interrupt (DHRS)—R/WC. A D2H Register FIS has
been received with the I bit set, and has been copied into system memory.
Bit Description
Bit Description
31 Cold Presence Detect Enable (CPDE)—RO. Cold Presence Detect is not supported.
30
Task File Error Enable (TFEE)—R/W. When set, and GHC.IE and PxTFD.STS.ERR
(due to a reception of the error register from a received FIS) are set, the PCH will
generate an interrupt.
29 Host Bus Fatal Error Enable (HBFE)R/W. When set, and GHC.IE and PxS.HBFS are
set, the PCH will generate an interrupt.
28 Host Bus Data Error Enable (HBDE)—R/W. When set, and GHC.IE and PxS.HBDS
are set, the PCH will generate an interrupt.
27 Host Bus Data Error Enable (HBDE)—R/W. When set, GHC.IE is set, and PxIS.HBDS
is set, the PCH will generate an interrupt.
26 Interface Non-fatal Error Enable (INFE)—R/W. When set, GHC.IE is set, and
PxIS.INFS is set, the PCH will generate an interrupt.
25 Reserved
24 Overflow Error Enable (OFE)—R/W. When set, and GHC.IE and PxS.OFS are set, the
PCH will generate an interrupt.
Datasheet 627
SATA Controller Registers (D31:F2)
23 Incorrect Port Multiplier Enable (IPME)—R/W. The PCH SATA controller does not
support Port Multipliers. BIOS and storage software should keep this bit cleared to 0.
22 PhyRdy Change Interrupt Enable (PRCE)—R/W. When set, and GHC.IE is set, and
PxIS.PRCS is set, the PCH shall generate an interrupt.
21:8 Reserved
7
Device Interlock Enable (DIE)—R/W. When set, and PxIS.DIS is set, the PCH will
generate an interrupt.
For systems that do not support an interlock switch, this bit shall be a read-only 0.
6Port Change Interrupt Enable (PCE)—R/W. When set, and GHC.IE and PxS.PCS are
set, the PCH will generate an interrupt.
5Descriptor Processed Interrupt Enable (DPE)—R/W. When set, and GHC.IE and
PxS.DPS are set, the PCH will generate an interrupt
4Unknown FIS Interrupt Enable (UFIE)—R/W. When set, and GHC.IE is set and an
unknown FIS is received, the PCH will generate this interrupt.
3Set Device Bits FIS Interrupt Enable (SDBE)—R/W. When set, and GHC.IE and
PxS.SDBS are set, the PCH will generate an interrupt.
2DMA Setup FIS Interrupt Enable (DSE)—R/W. When set, and GHC.IE and PxS.DSS
are set, the PCH will generate an interrupt.
1PIO Setup FIS Interrupt Enable (PSE)—R/W. When set, and GHC.IE and PxS.PSS
are set, the PCH will generate an interrupt.
0Device to Host Register FIS Interrupt Enable (DHRE)—R/W. When set, and
GHC.IE and PxS.DHRS are set, the PCH will generate an interrupt.
Bit Description
SATA Controller Registers (D31:F2)
628 Datasheet
14.4.2.7 PxCMD—Port [5:0] Command Register (D31:F2)
Address Offset: Port 0: ABAR + 118h Attribute: R/W, RO, R/WO
Port 1: ABAR + 198h
Port 2: ABAR + 218h (Desktop Only)
Port 3: ABAR + 298h (Desktop Only)
Port 4: ABAR + 318h
Port 5: ABAR + 398h
Port 6: ABAR + 418h
Default Value: 0000w00wh Size: 32 bits
where w = 00?0b (for?, see bit description)
Function Level Reset:No (Bit 21, 19 and 18 only)
Bit Description
31:28
Interface Communication Control (ICC)—R/W.This is a four bit field that can be
used to control reset and power states of the interface. Writes to this field will cause
actions on the interface, either as primitives or an OOB sequence, and the resulting
status of the interface will be reported in the PxSSTS register (Address offset Port
0:ABAR+124h, Port 1: ABAR+1A4h, Port 2: ABAR+224h, Port 3: ABAR+2A4h, Port 4:
ABAR+224h, Port 5: ABAR+2A4h).
When system software writes a non-reserved value other than No-Op (0h), the PCH
will perform the action and update this field back to Idle (0h).
If software writes to this field to change the state to a state the link is already in (such
as, interface is in the active state and a request is made to go to the active state), the
PCH will take no action and return this field to Idle.
NOTE: When the ALPE bit (bit 26) is set, then this register should not be set to 02h or
06h.
27
Aggressive Slumber / Partial (ASP)—R/W. When set, and the ALPE bit (bit 26) is
set, the PCH shall aggressively enter the slumber state when it clears the PxCI register
and the PxSACT register is cleared. When cleared, and the ALPE bit is set, the PCH will
aggressively enter the partial state when it clears the PxCI register and the PxSACT
register is cleared. If CAP.SALP is cleared to 0, software shall treat this bit as reserved.
26
Aggressive Link Power Management Enable (ALPE)—R/W. When set, the PCH
will aggressively enter a lower link power state (partial or slumber) based upon the
setting of the ASP bit (bit 27).
Value Definition
Fh–7h Reserved
6h
Slumber: This will cause the PCH to request a transition of the
interface to the slumber state. The SATA device may reject the
request and the interface will remain in its current state
5h–3h Reserved
2h
Partial: This will cause the PCH to request a transition of the
interface to the partial state. The SATA device may reject the
request and the interface will remain in its current state.
1h Active: This will cause the PCH to request a transition of the
interface into the active
0h
No-Op / Idle: When software reads this value, it indicates the PCH is
not in the process of changing the interface state or sending a
device reset, and a new link command may be issued.
Datasheet 629
SATA Controller Registers (D31:F2)
25
Drive LED on ATAPI Enable (DLAE)—R/W. When set, the PCH will drive the LED pin
active for ATAPI commands (PxCLB[CHz.A] set) in addition to ATA commands. When
cleared, the PCH will only drive the LED pin active for ATA commands. See
Section 5.16.9 for details on the activity LED.
24
Device is ATAPI (ATAPI)—R/W. When set, the connected device is an ATAPI device.
This bit is used by the PCH to control whether or not to generate the desktop LED
when commands are active. See Section 5.16.9 for details on the activity LED.
23 Reserved
22 BIOS must set this bit to 0.
21
External SATA Port (ESP)—R/WO.
0 = This port supports internal SATA devices only.
1 = This port will be used with an external SATA device and hot plug is supported.
When set, CAP.SXS must also be set.
This bit is not reset by Function Level Reset.
20 Reserved
19
Mechanical Switch Attached to Port (MPSP)—R/WO. When interlock switches are
supported in the platform (CAP.SIS [ABAR+00h:bit 28] set), this indicates whether
this particular port has an interlock switch attached. This bit can be used by system
software to enable such features as aggressive power management, as disconnects
can always be detected regardless of PHY state with an interlock switch. When this bit
is set, it is expected that HPCP (bit 18) in this register is also set.
The PCH takes no action on the state of this bit – it is for system software only. For
example, if this bit is cleared, and an interlock switch toggles, the PCH still treats it as
a proper interlock switch event.
NOTE: This bit is not reset on a Controller reset or by a Function Level Reset.
18
Hot Plug Capable Port (HPCP)—R/WO.
0 = Port is not capable of Hot-Plug.
1 = Port is Hot-Plug capable.
This indicates whether the platform exposes this port to a device which can be Hot-
Plugged. SATA by definition is hot-pluggable, but not all platforms are constructed to
allow the device to be removed (it may be screwed into the chassis, for example). This
bit can be used by system software to indicate a feature such as “eject device” to the
end-user. The PCH takes no action on the state of this bit—it is for system software
only. For example, if this bit is cleared, and a Hot-Plug event occurs, the PCH still
treats it as a proper Hot-Plug event.
NOTE: This bit is not reset on a Controller reset or by a Function Level Reset.
17 BIOS must set this bit to 0.
16 Reserved
15
Controller Running (CR)—RO. When this bit is set, the DMA engines for a port are
running. See section 5.2.2 of the Serial ATA AHCI Specification for details on when this
bit is set and cleared by the PCH.
14
FIS Receive Running (FR)—RO. When set, the FIS Receive DMA engine for the port
is running. See section 12.2.2 of the Serial ATA AHCI Specification for details on when
this bit is set and cleared by the PCH.
Bit Description
SATA Controller Registers (D31:F2)
630 Datasheet
13
Interlock Switch State (ISS)—RO. For systems that support interlock switches
(using CAP.SIS [ABAR+00h:bit 28]), if an interlock switch exists on this port (using
ISP in this register), this bit indicates the current state of the interlock switch. A 0
indicates the switch is closed, and a 1 indicates the switch is opened.
For systems that do not support interlock switches, or if an interlock switch is not
attached to this port, this bit reports 0.
12:8
Current Command Slot (CCS)—RO. Indicates the current command slot the PCH is
processing. This field is valid when the ST bit is set in this register, and is constantly
updated by the PCH. This field can be updated as soon as the PCH recognizes an active
command slot, or at some point soon after when it begins processing the command.
This field is used by software to determine the current command issue location of the
PCH. In queued mode, software shall not use this field, as its value does not represent
the current command being executed. Software shall only use PxCI and PxSACT when
running queued commands.
7:5 Reserved
4
FIS Receive Enable (FRE)—R/W. When set, the PCH may post received FISes into
the FIS receive area pointed to by PxFB (ABAR+108h/188h/208h/288h) and PxFBU
(ABAR+10Ch/18Ch/20Ch/28Ch). When cleared, received FISes are not accepted by
the PCH, except for the first D2H (device-to-host) register FIS after the initialization
sequence.
System software must not set this bit until PxFB (PxFBU) have been programmed with
a valid pointer to the FIS receive area, and if software wishes to move the base, this
bit must first be cleared, and software must wait for the FR bit (bit 14) in this register
to be cleared.
3
Command List Override (CLO)—R/W. Setting this bit to 1 causes PxTFD.STS.BSY
and PxTFD.STS.DRQ to be cleared to 0. This allows a software reset to be transmitted
to the device regardless of whether the BSY and DRQ bits are still set in the
PxTFD.STS register. The Controller sets this bit to 0 when PxTFD.STS.BSY and
PxTFD.STS.DRQ have been cleared to 0. A write to this register with a value of 0 shall
have no effect.
This bit shall only be set to 1 immediately prior to setting the PxCMD.ST bit to 1 from
a previous value of 0. Setting this bit to 1 at any other time is not supported and will
result in indeterminate behavior. Software must wait for CLO to be cleared to 0 before
setting PxCMD.ST to 1.
2Power On Device (POD)—RO. Cold presence detect not supported. Defaults to 1.
1
Spin-Up Device (SUD)—R/W / RO. This bit is R/W and defaults to 0 for systems that
support staggered spin-up (R/W when CAP.SSS (ABAR+00h:bit 27) is 1). Bit is RO 1
for systems that do not support staggered spin-up (when CAP.SSS is 0).
0 = No action.
1 = On an edge detect from 0 to 1, the PCH starts a COMRESET initialization sequence
to the device.
Clearing this bit to 0 does not cause any OOB signal to be sent on the interface. When
this bit is cleared to 0 and PxSCTL.DET=0h, the Controller will enter listen mode.
0
Start (ST)—R/W. When set, the PCH may process the command list. When cleared,
the PCH may not process the command list. Whenever this bit is changed from a 0 to
a 1, the PCH starts processing the command list at entry 0. Whenever this bit is
changed from a 1 to a 0, the PxCI register is cleared by the PCH upon the PCH putting
the controller into an idle state.
See Section 12.2.1 of the Serial ATA AHCI Specification for important restrictions on
when ST can be set to 1.
Bit Description
Datasheet 631
SATA Controller Registers (D31:F2)
14.4.2.8 PxTFD—Port [5:0] Task File Data Register (D31:F2)
Address Offset: Port 0: ABAR + 120h Attribute: RO
Port 1: ABAR + 1A0h
Port 2: ABAR + 220h (Desktop Only)
Port 3: ABAR + 2A0h (Desktop Only)
Port 4: ABAR + 320h
Port 5: ABAR + 3A0h
Port 6: ABAR + 420h
Default Value: 0000007Fh Size: 32 bits
This is a 32-bit register that copies specific fields of the task file when FISes are
received. The FISes that contain this information are: D2H Register FIS,PIO Setup FIS
and Set Device Bits FIS
14.4.2.9 PxSIG—Port [5:0] Signature Register (D31:F2)
Address Offset: Port 0: ABAR + 124h Attribute: RO
Port 1: ABAR + 1A4h
Port 2: ABAR + 224h (Desktop Only)
Port 3: ABAR + 2A4h (Desktop Only)
Port 4: ABAR + 324h
Port 5: ABAR + 3A4h
Port 6: ABAR + 424h
Default Value: FFFFFFFFh Size: 32 bits
This is a 32-bit register which contains the initial signature of an attached device when
the first D2H Register FIS is received from that device. It is updated once after a reset
sequence.
Bit Description
31:16 Reserved
15:8 Error (ERR)—RO. Contains the latest copy of the task file error register.
7:0
Status (STS)—RO. Contains the latest copy of the task file status register. Fields of
note in this register that affect AHCI.
Bit Field Definition
7 BSY Indicates the interface is busy
6:4 N/A Not applicable
3 DRQ Indicates a data transfer is requested
2:1 N/A Not applicable
0 ERR Indicates an error during the transfer
Bit Description
31:0
Signature (SIG)RO. Contains the signature received from a device on the first D2H
register FIS. The bit order is as follows:
Bit Field
31:24 LBA High Register
23:16 LBA Mid Register
15:8 LBA Low Register
7:0 Sector Count Register
SATA Controller Registers (D31:F2)
632 Datasheet
14.4.2.10 PxSSTS—Port [5:0] Serial ATA Status Register (D31:F2)
Address Offset: Port 0: ABAR + 128h Attribute: RO
Port 1: ABAR + 1A8h
Port 2: ABAR + 228h (Desktop Only)
Port 3: ABAR + 2A8h (Desktop Only)
Port 4: ABAR + 328h
Port 5: ABAR + 3A8h
Port 6: ABAR + 428h
Default Value: 00000000h Size: 32 bits
This is a 32-bit register that conveys the current state of the interface and host. The
PCH updates it continuously and asynchronously. When the PCH transmits a COMRESET
to the device, this register is updated to its reset values.
Bit Description
31:12 Reserved
11:8
Interface Power Management (IPM)—RO. Indicates the current interface state:
All other values reserved.
7:4
Current Interface Speed (SPD)—RO. Indicates the negotiated interface
communication speed.
All other values reserved.
The PCH supports Gen 1 communication rates (1.5 Gb/s) and Gen 2 rates (3.0 Gb/s).
3:0
Device Detection (DET)—RO. Indicates the interface device detection and Phy state:
All other values reserved.
Value Description
0h Device not present or communication not established
1h Interface in active state
2h Interface in PARTIAL power management state
6h Interface in SLUMBER power management state
Value Description
0h Device not present or communication not established
1h Generation 1 communication rate negotiated
2h Generation 2 communication rate negotiated
Value Description
0h No device detected and Phy communication not established
1h Device presence detected but Phy communication not established
3h Device presence detected and Phy communication established
4h Phy in offline mode as a result of the interface being disabled or
running in a BIST loopback mode
Datasheet 633
SATA Controller Registers (D31:F2)
14.4.2.11 PxSCTL—Port [5:0] Serial ATA Control Register (D31:F2)
Address Offset: Port 0: ABAR + 12Ch Attribute: R/W, RO
Port 1: ABAR + 1ACh
Port 2: ABAR + 22Ch (Desktop Only)
Port 3: ABAR + 2ACh (Desktop Only)
Port 4: ABAR + 32Ch
Port 5: ABAR + 3ACh
Port 6: ABAR + 42Ch
Default Value: 00000004h Size: 32 bits
This is a 32-bit read-write register by which software controls SATA capabilities. Writes
to the SControl register result in an action being taken by the PCH or the interface.
Reads from the register return the last value written to it.
Bit Description
31:16 Reserved
15:12 Select Power Management (SPM)—R/W. This field is not used by AHCI
11:8
Interface Power Management Transitions Allowed (IPM)—R/W. Indicates which
power states the PCH is allowed to transition to:
All other values reserved
7:4
Speed Allowed (SPD)—R/W. Indicates the highest allowable speed of the interface.
This speed is limited by the CAP.ISS (ABAR+00h:bit 23:20) field.
The PCH Supports Gen 1 communication rates (1.5 Gb/s) and Gen 2 rates
(3.0 Gb/s).
3:0
Device Detection Initialization (DET)—R/W. Controls the PCH’s device detection
and interface initialization.
All other values reserved.
When this field is written to a 1h, the PCH initiates COMRESET and starts the
initialization process. When the initialization is complete, this field shall remain 1h until
set to another value by software.
This field may only be changed to 1h or 4h when PxCMD.ST is 0. Changing this field
while the PCH is running results in undefined behavior.
NOTE: It is permissible to implement any of the Serial ATA defined behaviors for
transmission of COMRESET when DET=1h.
Value Description
0h No interface restrictions
1h Transitions to the PARTIAL state disabled
2h Transitions to the SLUMBER state disabled
3h Transitions to both PARTIAL and SLUMBER states disabled
Value Description
0h No speed negotiation restrictions
1h Limit speed negotiation to Generation 1 communication rate
2h Limit speed negotiation to Generation 2 communication rate
Value Description
0h No device detection or initialization action requested
1h
Perform interface communication initialization sequence to
establish communication. This is functionally equivalent to a hard
reset and results in the interface being reset and communications
re-initialized
4h Disable the Serial ATA interface and put Phy in offline mode
SATA Controller Registers (D31:F2)
634 Datasheet
14.4.2.12 PxSERR—Port [5:0] Serial ATA Error Register (D31:F2)
Address Offset: Port 0: ABAR + 130h Attribute: R/WC
Port 1: ABAR + 1B0h
Port 2: ABAR + 230h (Desktop Only)
Port 3: ABAR + 2B0h (Desktop Only)
Port 4: ABAR + 330h
Port 5: ABAR + 3B0h
Port 6: ABAR + 430h
Default Value: 00000000h Size: 32 bits
Bits 26:16 of this register contain diagnostic error information for use by diagnostic
software in validating correct operation or isolating failure modes. Bits 11:0 contain
error information used by host software in determining the appropriate response to the
error condition. If one or more of bits 11:8 of this register are set, the controller will
stop the current transfer.
Bit Description
31:27 Reserved
26
Exchanged (X)—R/WC. When set to 1, this bit indicates that a change in device
presence has been detected since the last time this bit was cleared. This bit shall
always be set to 1 anytime a COMINIT signal is received. This bit is reflected in the
P0IS.PCS bit.
25 Unrecognized FIS Type (F)—R/WC. Indicates that one or more FISs were received
by the Transport layer with good CRC, but had a type field that was not recognized.
24
Transport state transition error (T)—R/WC. Indicates that an error has occurred in
the transition from one state to another within the Transport layer since the last time
this bit was cleared.
23
Link Sequence Error (S)—R/WC: Indicates that one or more Link state machine error
conditions was encountered. The Link Layer state machine defines the conditions under
which the link layer detects an erroneous transition.
22
Handshake (H)—R/WC. Indicates that one or more R_ERR handshake response was
received in response to frame transmission. Such errors may be the result of a CRC
error detected by the recipient, a disparity or 8b/10b decoding error, or other error
condition leading to a negative handshake on a transmitted frame.
21 CRC Error (C)—R/WC. Indicates that one or more CRC errors occurred with the Link
Layer.
20 Disparity Error (D)—R/WC. This field is not used by AHCI.
19 10b to 8b Decode Error (B)—R/WC. Indicates that one or more 10b to 8b decoding
errors occurred.
18 Comm Wake (W)—R/WC. Indicates that a Comm Wake signal was detected by the
Phy.
17 Phy Internal Error (I)—R/WC. Indicates that the Phy detected some internal error.
16
PhyRdy Change (N)—R/WC. When set to 1, this bit indicates that the internal PhyRdy
signal changed state since the last time this bit was cleared. In the PCH, this bit will be
set when PhyRdy changes from a 0 -> 1 or a 1 -> 0. The state of this bit is then
reflected in the PxIS.PRCS interrupt status bit and an interrupt will be generated if
enabled. Software clears this bit by writing a 1 to it.
15:12 Reserved
11 Internal Error (E)—R/WC. The SATA controller failed due to a master or target abort
when attempting to access system memory.
Datasheet 635
SATA Controller Registers (D31:F2)
14.4.2.13 PxSACT—Port [5:0] Serial ATA Active Register (D31:F2)
Address Offset: Port 0: ABAR + 134h Attribute: R/W
Port 1: ABAR + 1B4h
Port 2: ABAR + 234h (Desktop Only)
Port 3: ABAR + 2B4h (Desktop Only)
Port 4: ABAR + 334h
Port 5: ABAR + 3B4h
Port 6: ABAR + 434h
Default Value: 00000000h Size: 32 bits
10
Protocol Error (P)—R/WC. A violation of the Serial ATA protocol was detected.
NOTE: The PCH does not set this bit for all protocol violations that may occur on the
SATA link.
9
Persistent Communication or Data Integrity Error (C)—R/WC. A communication
error that was not recovered occurred that is expected to be persistent. Persistent
communications errors may arise from faulty interconnect with the device, from a
device that has been removed or has failed, or a number of other causes.
8Transient Data Integrity Error (T)—R/WC. A data integrity error occurred that was
not recovered by the interface.
7:2 Reserved
1
Recovered Communications Error (M)—R/WC. Communications between the device
and host was temporarily lost but was re-established. This can arise from a device
temporarily being removed, from a temporary loss of Phy synchronization, or from
other causes and may be derived from the PhyNRdy signal between the Phy and Link
layers.
0Recovered Data Integrity Error (I)—R/WC. A data integrity error occurred that was
recovered by the interface through a retry operation or other recovery action.
Bit Description
Bit Description
31:0
Device Status (DS)—R/W. System software sets this bit for SATA queuing operations
prior to setting the PxCI.CI bit in the same command slot entry. This field is cleared
using the Set Device Bits FIS.
This field is also cleared when PxCMD.ST (ABAR+118h/198h/218h/298h:bit 0) is
cleared by software, and as a result of a COMRESET or SRST.
SATA Controller Registers (D31:F2)
636 Datasheet
14.4.2.14 PxCI—Port [5:0] Command Issue Register (D31:F2)
Address Offset: Port 0: ABAR + 138h Attribute: R/W
Port 1: ABAR + 1B8h
Port 2: ABAR + 238h (Desktop Only)
Port 3: ABAR + 2B8h (Desktop Only)
Port 4: ABAR + 338h
Port 5: ABAR + 3B8h
Port 6: ABAR + 438h
Default Value: 00000000h Size: 32 bits
§ §
Bit Description
31:0
Commands Issued (CI)—R/W. This field is set by software to indicate to the PCH that
a command has been built-in system memory for a command slot and may be sent to
the device. When the PCH receives a FIS which clears the BSY and DRQ bits for the
command, it clears the corresponding bit in this register for that command slot. Bits in
this field shall only be set to 1 by software when PxCMD.ST is set to 1.
This field is also cleared when PxCMD.ST (ABAR+118h/198h/218h/298h:bit 0) is
cleared by software.
Datasheet 637
SATA Controller Registers (D31:F5)
15 SATA Controller Registers
(D31:F5)
15.1 PCI Configuration Registers (SATA–D31:F5)
Note: Address locations that are not shown should be treated as Reserved.
All of the SATA registers are in the core well. None of the registers can be locked.
Table 15-1. SATA Controller PCI Register Address Map (SATA–D31:F5) (Sheet 1 of 2)
Offset Mnemonic Register Name Default Type
00h–01h VID Vendor Identification 8086h RO
02h–03h DID Device Identification See register
description RO
04h–05h PCICMD PCI Command 0000h R/W, RO
06h–07h PCISTS PCI Status 02B0h R/WC, RO
08h RID Revision Identification See register
description RO
09h PI Programming Interface See register
description
See
register
description
0Ah SCC Sub Class Code See register
description
See
register
description
0Bh BCC Base Class Code 01h RO
0Dh PMLT Primary Master Latency Timer 00h RO
10h–13h PCMD_BAR Primary Command Block Base Address 00000001h R/W, RO
14h–17h PCNL_BAR Primary Control Block Base Address 00000001h R/W, RO
18h–1Bh SCMD_BAR Secondary Command Block Base
Address 00000001h R/W, RO
1Ch–1Fh SCNL_BAR Secondary Control Block Base Address 00000001h R/W, RO
20h–23h BAR Legacy Bus Master Base Address 00000001h R/W, RO
24h–27h SIDPBA Serial ATA Index / Data Pair Base
Address 00000000h
See
register
description
2Ch–2Dh SVID Subsystem Vendor Identification 0000h R/WO
2Eh–2Fh SID Subsystem Identification 0000h R/WO
34h CAP Capabilities Pointer 80h RO
3Ch INT_LN Interrupt Line 00h R/W
3Dh INT_PN Interrupt Pin See register
description RO
40h–41h IDE_TIM Primary IDE Timing Register 0000h R/W
42h–43h IDE_TIM Secondary IDE Timing Registers 0000h R/W
SATA Controller Registers (D31:F5)
638 Datasheet
NOTE: The PCH SATA controller is not arbitrated as a PCI device; therefore, it does not need a
master latency timer.
15.1.1 VID—Vendor Identification Register (SATA—D31:F5)
Offset Address: 00h01h Attribute: RO
Default Value: 8086h Size: 16 bit
Lockable: No Power Well: Core
15.1.2 DID—Device Identification Register (SATA—D31:F5)
Offset Address: 02h03h Attribute: RO
Default Value: See bit description Size: 16 bit
Lockable: No Power Well: Core
48h SDMA_CNT Synchronous DMA Control 00h R/W
4Ah–4Bh SDMA_TIM Synchronous DMA Timing 0000h R/W
54h–57h IDE_CONFIG DE I/O Configuration 00000000h R/W
70h–71h PID PCI Power Management Capability ID See register
description RO
72h–73h PC PCI Power Management Capabilities 4003h RO
74h–75h PMCS PCI Power Management Control and
Status 0008h R/W, RO,
R/WC
90h MAP Address Map 00h R/W
92h–93h PCS Port Control and Status 0000h R/W, RO,
R/WC
A8h–ABh SCAP0 SATA Capability Register 0 0010B012h RO
ACh–AFh SCAP1 SATA Capability Register 1 00000048h RO
B0h–B1h FLRCID FLR Capability ID 0009h RO
B2h–B3h FLRCLV FLR Capability Length and Value 2006h RO
B4h–B5h FLRCTRL FLR Control 0000h R/W, RO
C0h ATC APM Trapping Control 00h R/W
C4h ATS ATM Trapping Status 00h R/WC
Table 15-1. SATA Controller PCI Register Address Map (SATA–D31:F5) (Sheet 2 of 2)
Offset Mnemonic Register Name Default Type
Bit Description
15:0 Vendor ID—RO. This is a 16-bit value assigned to Intel. Intel VID = 8086h
Bit Description
15:0
Device ID—RO. This is a 16-bit value assigned to the PCH SATA controller.
NOTE: The value of this field will change dependent upon the value of the MAP
Register. See Section § § and Section 15.1.28
Datasheet 639
SATA Controller Registers (D31:F5)
15.1.3 PCICMD—PCI Command Register (SATA–D31:F5)
Address Offset: 04h05h Attribute: RO, R/W
Default Value: 0000h Size: 16 bits
Bit Description
15:11 Reserved
10
Interrupt Disable—R/W. This disables pin-based INTx# interrupts. This bit has no
effect on MSI operation.
0 = Internal INTx# messages are generated if there is an interrupt and MSI is not
enabled.
1 = Internal INTx# messages will not be generated.
9 Fast Back to Back Enable (FBE)—RO. Reserved as 0.
8 SERR# Enable (SERR_EN)RO. Reserved as 0.
7 Wait Cycle Control (WCC)—RO. Reserved as 0.
6
Parity Error Response (PER)—R/W.
0 = Disabled. SATA controller will not generate PERR# when a data parity error is
detected.
1 = Enabled. SATA controller will generate PERR# when a data parity error is detected.
5 VGA Palette Snoop (VPS)—RO. Reserved as 0.
4 Postable Memory Write Enable (PMWE)—RO. Reserved as 0.
3 Special Cycle Enable (SCE)—RO. Reserved as 0.
2
Bus Master Enable (BME)—R/W. This bit controls the PCH ability to act as a PCI
master for IDE Bus Master transfers. This bit does not impact the generation of
completions for split transaction commands.
1Memory Space Enable (MSE)—RO. This controller does not support AHCI; therefore,
no memory space is required.
0
I/O Space Enable (IOSE)—R/W. This bit controls access to the I/O space registers.
0 = Disables access to the Legacy or Native IDE ports (both Primary and Secondary) as
well as the Bus Master I/O registers.
1 = Enable. Note that the Base Address register for the Bus Master registers should be
programmed before this bit is set.
SATA Controller Registers (D31:F5)
640 Datasheet
15.1.4 PCISTS—PCI Status Register (SATA–D31:F5)
Address Offset: 06h07h Attribute: R/WC, RO
Default Value: 02B0h Size: 16 bits
Note: For the writable bits, software must write a 1 to clear bits that are set. Writing a 0 to
the bit has no effect.
15.1.5 RID—Revision Identification Register (SATA—D31:F5)
Offset Address: 08h Attribute: RO
Default Value: See bit description Size: 8 bits
Bit Description
15
Detected Parity Error (DPE)—R/WC.
0 = No parity error detected by SATA controller.
1 = SATA controller detects a parity error on its interface.
14 Signaled System Error (SSE)—RO. Reserved as 0.
13
Received Master Abort (RMA)—R/WC.
0 = Master abort Not generated.
1 = SATA controller, as a master, generated a master abort.
12 Reserved
11 Signaled Target Abort (STA)—RO. Reserved as 0.
10:9 DEVSEL# Timing Status (DEV_STS)—RO.
01 = Hardwired; Controls the device select time for the SATA controller’s PCI interface.
8
Data Parity Error Detected (DPED)—R/WC. For PCH, this bit can only be set on
read completions received from SiBUS where there is a parity error.
1 = SATA controller, as a master, either detects a parity error or sees the parity error
line asserted, and the parity error response bit (bit 6 of the command register) is
set.
7Fast Back to Back Capable (FB2BC)—RO. Reserved as 1.
6User Definable Features (UDF)—RO. Reserved as 0.
566MHz Capable (66MHZ_CAP)—RO. Reserved as 1.
4
Capabilities List (CAP_LIST)—RO. This bit indicates the presence of a capabilities
list. The minimum requirement for the capabilities list must be PCI power management
for the SATA controller.
3
Interrupt Status (INTS)—RO. Reflects the state of INTx# messages, IRQ14 or
IRQ15.
0 = Interrupt is cleared (independent of the state of Interrupt Disable bit in the
command register [offset 04h]).
1 = Interrupt is to be asserted
2:0 Reserved
Bit Description
7:0 Revision ID—RO. See the Intel® 5 Series Chipset and Intel® 3400 Series Chipset
Specification Update for the value of the Revision ID Register
Datasheet 641
SATA Controller Registers (D31:F5)
15.1.6 PI—Programming Interface Register (SATA–D31:F5)
Address Offset: 09h Attribute: RO
Default Value: 85h Size: 8 bits
When SCC = 01h
15.1.7 SCC—Sub Class Code Register (SATA–D31:F5)
Address Offset: 0Ah Attribute: RO
Default Value: 01h Size: 8 bits
15.1.8 BCC—Base Class Code Register
(SATA–D31:F5SATA–D31:F5)
Address Offset: 0Bh Attribute: RO
Default Value: 01h Size: 8 bits
Bit Description
7 This read-only bit is a 1 to indicate that the PCH supports bus master operation
6:4 Reserved
3
Secondary Mode Native Capable (SNC)—RO. Indicates whether or not the
secondary channel has a fixed mode of operation.
0 = Indicates the mode is fixed and is determined by the (read-only) value of bit 2.
This bit will always return 0.
2
Secondary Mode Native Enable (SNE)—RO.
Determines the mode that the secondary channel is operating in.
1 = Secondary controller operating in native PCI mode.
This bit will always return 1.
1
Primary Mode Native Capable (PNC)—RO. Indicates whether or not the primary
channel has a fixed mode of operation.
0 = Indicates the mode is fixed and is determined by the (read-only) value of bit 0.
This bit will always return 0.
0
Primary Mode Native Enable (PNE)—RO.
Determines the mode that the primary channel is operating in.
1 = Primary controller operating in native PCI mode.
This bit will always return 1.
Bit Description
7:0 Sub Class Code (SCC)—RO.
The value of this field determines whether the controller supports legacy IDE mode.
Bit Description
7:0 Base Class Code (BCC)—RO.
01h = Mass storage device
SATA Controller Registers (D31:F5)
642 Datasheet
15.1.9 PMLT—Primary Master Latency Timer Register
(SATA–D31:F5)
Address Offset: 0Dh Attribute: RO
Default Value: 00h Size: 8 bits
15.1.10 PCMD_BAR—Primary Command Block Base Address
Register (SATA–D31:F5)
Address Offset: 10h13h Attribute: R/W, RO
Default Value: 00000001h Size: 32 bits
.
NOTE: This 8-byte I/O space is used in native mode for the Primary Controller’s Command Block.
15.1.11 PCNL_BAR—Primary Control Block Base Address Register
(SATA–D31:F5)
Address Offset: 14h17h Attribute: R/W, RO
Default Value: 00000001h Size: 32 bits
.
NOTE: This 4-byte I/O space is used in native mode for the Primary Controller’s Command Block.
Bit Description
7:0
Master Latency Timer Count (MLTC)—RO.
00h = Hardwired. The SATA controller is implemented internally, and is not arbitrated
as a PCI device, so it does not need a Master Latency Timer.
Bit Description
31:16 Reserved
15:3 Base Address—R/W. This field provides the base address of the I/O space (8
consecutive I/O locations).
2:1 Reserved
0Resource Type Indicator (RTE)—RO. Hardwired to 1 to indicate a request for I/O
space.
Bit Description
31:16 Reserved
15:2 Base Address—R/W. This field provides the base address of the I/O space (4
consecutive I/O locations).
1 Reserved
0 Resource Type Indicator (RTE)—RO. Hardwired to 1 to indicate a request for I/O
space.
Datasheet 643
SATA Controller Registers (D31:F5)
15.1.12 SCMD_BAR—Secondary Command Block Base Address
Register (IDE D31:F5)
Address Offset: 18h1Bh Attribute: R/W, RO
Default Value: 00000001h Size: 32 bits
NOTE: This 8-byte I/O space is used in native mode for the Secondary Controller’s Command
Block.
15.1.13 SCNL_BAR—Secondary Control Block Base Address
Register (IDE D31:F5)
Address Offset: 1Ch1Fh Attribute: R/W, RO
Default Value: 00000001h Size: 32 bits
NOTE: This 4-byte I/O space is used in native mode for the Secondary Controller’s Command
Block.
Bit Description
31:16 Reserved
15:3 Base Address—R/W. This field provides the base address of the I/O space (8
consecutive I/O locations).
2:1 Reserved
0Resource Type Indicator (RTE)—RO. Hardwired to 1 to indicate a request for I/O
space.
Bit Description
31:16 Reserved
15:2 Base Address—R/W. This field provides the base address of the I/O space (4
consecutive I/O locations).
1 Reserved
0Resource Type Indicator (RTE)—RO. Hardwired to 1 to indicate a request for I/O
space.
SATA Controller Registers (D31:F5)
644 Datasheet
15.1.14 BAR—Legacy Bus Master Base Address Register
(SATA–D31:F5)
Address Offset: 20h23h Attribute: R/W, RO
Default Value: 00000001h Size: 32 bits
The Bus Master IDE interface function uses Base Address register 5 to request a 16-
byte IO space to provide a software interface to the Bus Master functions. Only 12
bytes are actually used (6 bytes for primary, 6 bytes for secondary). Only bits [15:4]
are used to decode the address.
15.1.15 SIDPBA—SATA Index/Data Pair Base Address Register
(SATA–D31:F5)
Address Offset: 24h27h Attribute: R/W, RO
Default Value: 00000000h Size: 32 bits
When SCC is 01h
When the programming interface is IDE, the register represents an I/O BAR allocating
16B of I/O space for the I/O mapped registers defined in Section 15.3. Note that
although 16B of locations are allocated, some maybe reserved.
Bit Description
31:16 Reserved
15:5 Base Address—R/W. This field provides the base address of the I/O space (16
consecutive I/O locations).
4Base Address 4 (BA4)—R/W.
When SCC is 01h, this bit will be R/W resulting in requesting 16B of I/O space.
3:1 Reserved
0Resource Type Indicator (RTE)—RO. Hardwired to 1 to indicate a request for I/O
space.
Bit Description
31:16 Reserved
15:4 Base Address (BA)—R/W. Base address of register I/O space
3:1 Reserved
0Resource Type Indicator (RTE)—RO. Hardwired to 1 to indicate a request for I/O
space.
Datasheet 645
SATA Controller Registers (D31:F5)
15.1.16 SVID—Subsystem Vendor Identification Register
(SATA–D31:F5)
Address Offset: 2Ch2Dh Attribute: R/WO
Default Value: 0000h Size: 16 bits
Lockable: No Power Well: Core
Function Level Reset: No
15.1.17 SID—Subsystem Identification Register (SATA–D31:F5)
Address Offset: 2Eh2Fh Attribute: R/WO
Default Value: 0000h Size: 16 bits
Lockable: No Power Well: Core
15.1.18 CAP—Capabilities Pointer Register (SATA–D31:F5)
Address Offset: 34h Attribute: RO
Default Value: 70h Size: 8 bits
15.1.19 INT_LN—Interrupt Line Register (SATA–D31:F5)
Address Offset: 3Ch Attribute: R/W
Default Value: 00h Size: 8 bits
Function Level Reset: No
15.1.20 INT_PN—Interrupt Pin Register (SATA–D31:F5)
Address Offset: 3Dh Attribute: RO
Default Value: See Register Description Size: 8 bits
Bit Description
15:0 Subsystem Vendor ID (SVID)R/WO. Value is written by BIOS. No hardware action
taken on this value.
Bit Description
15:0 Subsystem ID (SID)—R/WO. Value is written by BIOS. No hardware action taken on
this value.
Bit Description
7:0
Capabilities Pointer (CAP_PTR)—RO. Indicates that the first capability pointer offset
is 70h if the Sub Class Code (SCC) (Dev 31:F2:0Ah) is configure as IDE mode (value of
01).
Bit Description
7:0 Interrupt Line—R/W. This field is used to communicate to software the interrupt line
that the interrupt pin is connected to. These bits are not reset by FLR.
Bit Description
7:0 Interrupt Pin—RO. This reflects the value of D31IP.SIP1 (Chipset Config
Registers:Offset 3100h:bits 11:8).
SATA Controller Registers (D31:F5)
646 Datasheet
15.1.21 IDE_TIM—IDE Timing Register (SATA–D31:F5)
Address Offset: Primary: 40h–41h Attribute: R/W
Secondary: 42h–43h
Default Value: 0000h Size: 16 bits
Note: Bits 14:12 and 9:0 of this register are R/W to maintain software compatibility. These
bits have no effect on hardware.
15.1.22 SDMA_CNT—Synchronous DMA Control Register
(SATA–D31:F5)
Address Offset: 48h Attribute: R/W
Default Value: 00h Size: 8 bits
Note: This register is R/W to maintain software compatibility. These bits have no effect on
hardware.
Bit Description
15
IDE Decode Enable (IDE)—R/W. Individually enable/disable the Primary or
Secondary decode.
0 = Disable.
1 = Enables the PCH to decode the associated Command Block and Control Block.
14:12 IDE_TIM Field 2—R/W. This field is R/W to maintain software compatibility. This field
has no effect on hardware.
11:10 Reserved
9:0 IDE_TIM Field 1—R/W. This field is R/W to maintain software compatibility. This field
has no effect on hardware.
Bit Description
7:4 Reserved
3:0 SDMA_CNT Field 1—R/W. This field is R/W to maintain software compatibility. This
field has no effect on hardware.
Datasheet 647
SATA Controller Registers (D31:F5)
15.1.23 SDMA_TIM—Synchronous DMA Timing Register
(SATA–D31:F5)
Address Offset: 4Ah–4Bh Attribute: R/W
Default Value: 0000h Size: 16 bits
Note: This register is R/W to maintain software compatibility. These bits have no effect on
hardware.
15.1.24 IDE_CONFIG—IDE I/O Configuration Register
(SATA–D31:F5)
Address Offset: 54h–57h Attribute: R/W
Default Value: 00000000h Size: 32 bits
Note: This register is R/W to maintain software compatibility. These bits have no effect on
hardware.
Bit Description
15:10 Reserved
9:8 SDMA_TIM Field 2—R/W. This field is R/W to maintain software compatibility. This
field has no effect on hardware.
7:2 Reserved
1:0 SDMA_TIM Field 1R/W. This field is R/W to maintain software compatibility. This
field has no effect on hardware.
Bit Description
31:24 Reserved
23:16 IDE_CONFIG Field 6—R/W. This field is R/W to maintain software compatibility. This
field has no effect on hardware.
15 Reserved
14 IDE_CONFIG Field 5—R/W. This field is R/W to maintain software compatibility. This
field has no effect on hardware.
13 Reserved
12 IDE_CONFIG Field 4—R/W. This field is R/W to maintain software compatibility. This
field has no effect on hardware.
11:8 Reserved
7:4 IDE_CONFIG Field 3—R/W. This field is R/W to maintain software compatibility. This
field has no effect on hardware.
3 Reserved
2IDE_CONFIG Field 2—R/W. This field is R/W to maintain software compatibility. This
field has no effect on hardware.
1 Reserved
0IDE_CONFIG Field 1—R/W. This field is R/W to maintain software compatibility. This
field has no effect on hardware.
SATA Controller Registers (D31:F5)
648 Datasheet
15.1.25 PID—PCI Power Management Capability Identification
Register (SATA–D31:F5)
Address Offset: 70h71h Attribute: RO
Default Value: B001h Size: 16 bits
15.1.26 PC—PCI Power Management Capabilities Register
(SATA–D31:F5)
Address Offset: 72h73h Attribute: RO
Default Value: 4003h Size: 16 bits
f
Bits Description
15:8
Next Capability (NEXT)—RO.
When SCC is 01h, this field will be B0h indicating the next item is FLR Capability Pointer
in the list.
7:0 Capability ID (CID)—RO. Indicates that this pointer is a PCI power management.
Bits Description
15:11 PME Support (PME_SUP)—RO. By default with SCC = 01h, the default value of 00000
indicates no PME support in IDE mode.
10 D2 Support (D2_SUP)—RO. Hardwired to 0. The D2 state is not supported
9 D1 Support (D1_SUP)—RO. Hardwired to 0. The D1 state is not supported
8:6 Auxiliary Current (AUX_CUR)—RO. PME# from D3COLD state is not supported, therefore
this field is 000b.
5Device Specific Initialization (DSI)—RO. Hardwired to 0 to indicate that no device-
specific initialization is required.
4 Reserved
3PME Clock (PME_CLK)—RO. Hardwired to 0 to indicate that PCI clock is not required to
generate PME#.
2:0 Version (VER)—RO. Hardwired to 011 to indicates support for Revision 1.2 of the PCI
Power Management Specification.
Datasheet 649
SATA Controller Registers (D31:F5)
15.1.27 PMCS—PCI Power Management Control and Status
Register (SATA–D31:F5)
Address Offset: 74h75h Attribute: RO, R/W, R/WC
Default Value: 0008h Size: 16 bits
Function Level Reset:No (Bits 8 and 15 only)
Bits Description
15
PME Status (PMES)—R/WC. Bit is set when a PME event is to be requested, and if this
bit and PMEE is set, a PME# will be generated from the SATA controller.
NOTE: When SCC=01h this bit will be RO 0. Software is advised to clear PMEE together
with PMES prior to changing SCC through MAP.SMS.
This bit is not reset by Function Level Reset.
14:9 Reserved
8
PME Enable (PMEE)—R/W. When SCC is not 01h, this bit R/W. When set, the SATA
controller generates PME# form D3HOT on a wake event.
NOTE: When SCC=01h this bit will be RO 0. Software is advised to clear PMEE together
with PMES prior to changing SCC through MAP.SMS.
This bit is not reset by Function Level Reset.
7:4 Reserved
3
No Soft Reset (NSFRST)—RO. These bits are used to indicate whether devices
transitioning from D3HOT state to D0 state will perform an internal reset.
0 = Device transitioning from D3HOT state to D0 state perform an internal reset.
1 = Device transitioning from D3HOT state to D0 state do not perform an internal reset.
Configuration content is preserved. Upon transition from the D3HOT state to D0 state
initialized state, no additional operating system intervention is required to preserve
configuration context beyond writing to the PowerState bits.
Regardless of this bit, the controller transition from D3HOT state to D0 state by a system
or bus segment reset will return to the state D0 uninitialized with only PME context
preserved if PME is supported and enabled.
2Reserved
1:0
Power State (PS)—R/W. These bits are used both to determine the current power
state of the
SATA controller and to set a new power state.
00 = D0 state
11 = D3HOT state
When in the D3HOT state, the controller’s configuration space is available, but the I/O
and memory spaces are not. Additionally, interrupts are blocked.
SATA Controller Registers (D31:F5)
650 Datasheet
15.1.28 MAP—Address Map Register (SATA–D31:F5)
Address Offset: 90h Attribute: R/W, R/WO, RO
Default Value: 00h Size: bits
Function Level Reset: No (Bits 9:8 only)
Bits Description
15:8 Reserved
7:6
SATA Mode Select (SMS)—R/W. Software programs these bits to control the mode in
which the SATA Controller should operate.
00b = IDE Mode
All other combinations are reserved.
5:2 Reserved
1:0 Map Value (MV)—Reserved.
Datasheet 651
SATA Controller Registers (D31:F5)
15.1.29 PCS—Port Control and Status Register (SATA–D31:F5)
Address Offset: 92h93h Attribute: R/W, RO
Default Value: 0000h Size: 16 bits
Function Level Reset: No
By default, the SATA ports are set to the disabled state (bits [5:0] = 0). When enabled
by software, the ports can transition between the on, partial, and slumber states and
can detect devices. When disabled, the port is in the “off” state and cannot detect any
devices.
If an AHCI-aware or RAID enabled operating system is being booted then system BIOS
shall insure that all supported SATA ports are enabled prior to passing control to the
OS. Once the AHCI aware OS is booted it becomes the enabling/disabling policy owner
for the individual SATA ports. This is accomplished by manipulating a port’s PxSCTL and
PxCMD fields. Because an AHCI or RAID aware OS will typically not have knowledge of
the PxE bits and because the PxE bits act as master on/off switches for the ports, pre-
boot software must insure that these bits are set to 1 prior to booting the OS,
regardless as to whether or not a device is currently on the port.
Bits Description
15:10 Reserved
9
Port 5 Present (P5P)—RO. The status of this bit may change at any time. This bit is
cleared when the port is disabled using P1E. This bit is not cleared upon surprise
removal of a device.
0 = No device detected.
1 = The presence of a device on Port 1 has been detected.
8
Port 4 Present (P4P)—RO. The status of this bit may change at any time. This bit is
cleared when the port is disabled using P0E. This bit is not cleared upon surprise
removal of a device.
0 = No device detected.
1 = The presence of a device on Port 0 has been detected.
7:2 Reserved
1
Port 5 Enabled (P5E)—R/W.
0 = Disabled. The port is in the ‘off’ state and cannot detect any devices.
1 = Enabled. The port can transition between the on, partial, and slumber states and
can detect devices.
This bit is read-only 0 when MAP.SPD[1]= 1.
0
Port 4 Enabled (P4E)—R/W.
0 = Disabled. The port is in the ‘off’ state and cannot detect any devices.
1 = Enabled. The port can transition between the on, partial, and slumber states and
can detect devices.
This bit is read-only 0 when MAP.SPD[0]= 1.
SATA Controller Registers (D31:F5)
652 Datasheet
15.1.30 SATACR0—SATA Capability Register 0 (SATA–D31:F5)
Address Offset: A8h–ABh Attribute: RO, RWO
Default Value: 0010B012h Size: 32 bits
Function Level Reset: No (Bits 15:8 only)
Note: When SCC is 01h this register is read-only 0.
.
15.1.31 SATACR1—SATA Capability Register 1 (SATA–D31:F5)
Address Offset: ACh–AFh Attribute: RO
Default Value: 00000048h Size: 32 bits
When SCC is 01h this register is read-only 0.
.
15.1.32 FLRCID—FLR Capability ID Register (SATA–D31:F5)
Address Offset: B0h–B1h Attribute: RO
Default Value: 0009h Size: 16 bits
.
Bit Description
31:24 Reserved
23:20 Major Revision (MAJREV)—RO. Major revision number of the SATA Capability Pointer
implemented.
19:16 Minor Revision (MINREV)—RO. Minor revision number of the SATA Capability Pointer
implemented.
15:8 Next Capability Pointer (NEXT)—RWO. Points to the next capability structure.
7:0 Capability ID (CAP)—RO. The value of 12h has been assigned by the PCI SIG to
designate the SATA capability pointer.
Bit Description
31:16 Reserved
15:4
BAR Offset (BAROFST)—RO. Indicates the offset into the BAR where the index/Data
pair are located (in DWord granularity). The index and Data I/O registers are located at
offset 10h within the I/O space defined by LBAR (BAR4). A value of 004h indicates
offset 10h.
3:0
BAR Location (BARLOC)—RO. Indicates the absolute PCI Configuration Register
address of the BAR containing the Index/Data pair (in DWord granularity). The Index
and Data I/O registers reside within the space defined by LBAR (BAR4) in the SATA
controller. a value of 8h indicates and offset of 20h, which is LBAR (BAR4).
Bit Description
15:8 Next Capability Pointer—RO. A value of 00h indicates the final item in the Capability
List.
7:0
Capability ID—RO. The value of this field depends on the FLRCSSECL bit.
If FLRCSSEL = 0, this field is 13h
If FLRCSSEL = 1, this field is 09h, indicating vendor specific capability.
Datasheet 653
SATA Controller Registers (D31:F5)
15.1.33 FLRCLV—FLR Capability Length and Value
Register (SATA–D31:F5)
Address Offset: B2h–B3h Attribute: RO, RWO
Default Value: 2006h Size: 16 bits
Function Level Reset: No (Bits 9:8 only)
When FLRCSSEL = 0, this register is defined as follows:
When FLRCSSEL = 1, this register is defined as follows:
15.1.34 FLRCTRL—FLR Control Register (SATA–D31:F5)
Address Offset: B4h–B5h Attribute: R/W, RO
Default Value: 0000h Size: 16 bits
Bit Description
15:10 Reserved
9FLR Capability—RWO. This field indicates support for Function Level Reset.
8TXP Capability—RWO. This field indicates support for the Transactions Pending (TXP)
bit. TXP must be supported if FLR is supported.
7:0 Capability Length—RO. This field indicates the number of bytes of the Vendor Specific
capability as required by the PCI spec. It has the value of 06h for FLR Capability.
Bit Description
15:12 Vendor Specific Capability ID—RO. A value of 02h identifies this capability as a
Function Level Reset.
11:8 Capability Version—RO. This field indicates the version of the FLR capability.
7:0 Capability Length—RO. This field indicates the number of bytes of the Vendor Specific
capability as required by the PCI spec. It has the value of 06h for FLR Capability.
Bit Description
15:9 Reserved
8
Transactions Pending (TXP)—RO.
0 = Completions for all Non-Posted requests have been received by the controller.
1 = Controller has issued Non-Posted request which has not been completed.
7:1 Reserved
0Initiate FLR—R/W. Used to initiate FLR transition. A write of 1 indicates FLR transition.
SATA Controller Registers (D31:F5)
654 Datasheet
15.1.35 ATC—APM Trapping Control Register (SATA–D31:F5)
Address Offset: C0h Attribute: R/W
Default Value: 00h Size: 8 bits
Note: This SATA controller does not support legacy I/O access. Therefore, this register is
reserved. Software shall not change the default values of the register; otherwise, the
result will be undefined.
.
15.1.36 ATC—APM Trapping Control Register (SATA–D31:F5)
Address Offset: C4h Attribute: R/WC
Default Value: 00h Size: 8 bits
Note: This SATA controller does not support legacy I/O access. Therefore, this register is
reserved. Software shall not change the default values of the register; otherwise, the
result will be undefined.
.
Bit Description
7:0 Reserved
Bit Description
7:0 Reserved
Datasheet 655
SATA Controller Registers (D31:F5)
15.2 Bus Master IDE I/O Registers (D31:F5)
The bus master IDE function uses 16 bytes of I/O space, allocated using the BAR
register, located in Device 31:Function 2 Configuration space, offset 20h. All bus
master IDE I/O space registers can be accessed as byte, word, or DWord quantities.
Reading reserved bits returns an indeterminate, inconsistent value, and writes to
reserved bits have no affect (but should not be attempted). These registers are only
used for legacy operation. Software must not use these registers when running AHCI.
The description of the I/O registers is shown in Table 1 5 - 2 .
Table 15-2. Bus Master IDE I/O Register Address Map
BAR+
Offset Mnemonic Register Default Type
00 BMICP Command Register Primary 00h R/W
01 Reserved RO
02 BMISP Bus Master IDE Status Register Primary 00h R/W, R/WC,
RO
03 Reserved RO
04–07 BMIDP Bus Master IDE Descriptor Table Pointer
Primary
xxxxxxxx
hR/W
08 BMICS Command Register Secondary 00h R/W
09 Reserved RO
0Ah BMISS Bus Master IDE Status Register Secondary 00h R/W, R/WC,
RO
0Bh Reserved RO
0Ch–0Fh BMIDS Bus Master IDE Descriptor Table Pointer
Secondary
xxxxxxxx
hR/W
SATA Controller Registers (D31:F5)
656 Datasheet
15.2.1 BMIC[P,S]—Bus Master IDE Command Register (D31:F5)
Address Offset: Primary: BAR + 00h Attribute: R/W
Secondary: BAR + 08h
Default Value: 00h Size: 8 bits
Bit Description
7:4 Reserved
3
Read / Write Control (R/WC)—R/W. This bit sets the direction of the bus master
transfer: This bit must NOT be changed when the bus master function is active.
0 = Memory reads
1 = Memory writes
2:1 Reserved
0
Start/Stop Bus Master (START)—R/W.
0 = All state information is lost when this bit is cleared. Master mode operation cannot
be stopped and then resumed. If this bit is reset while bus master operation is still
active (that is, the Bus Master IDE Active bit (D31:F5:BAR + 02h, bit 0) of the Bus
Master IDE Status register for that IDE channel is set) and the drive has not yet
finished its data transfer (the Interrupt bit in the Bus Master IDE Status register for
that IDE channel is not set), the bus master command is said to be aborted and
data transferred from the drive may be discarded instead of being written to
system memory.
1 = Enables bus master operation of the controller. Bus master operation does not
actually start unless the Bus Master Enable bit (D31:F5:04h, bit 2) in PCI
configuration space is also set. Bus master operation begins when this bit is
detected changing from 0 to 1. The controller will transfer data between the IDE
device and memory only when this bit is set. Master operation can be halted by
writing a 0 to this bit.
NOTE: This bit is intended to be cleared by software after the data transfer is
completed, as indicated by either the Bus Master IDE Active bit being cleared or
the Interrupt bit of the Bus Master IDE Status register for that IDE channel
being set, or both. Hardware does not clear this bit automatically. If this bit is
cleared to 0 prior to the DMA data transfer being initiated by the drive in a
device to memory data transfer, then the PCH will not send DMAT to terminate
the data transfer. Software intervention (such as, sending SRST) is required to
reset the interface in this condition.
Datasheet 657
SATA Controller Registers (D31:F5)
15.2.2 BMIS[P,S]—Bus Master IDE Status Register (D31:F5)
Address Offset: Primary: BAR + 02h Attribute: R/W, R/WC, RO
Secondary: BAR + 0Ah
Default Value: 00h Size: 8 bits
15.2.3 BMID[P,S]—Bus Master IDE Descriptor Table Pointer
Register (D31:F5)
Address Offset: Primary: BAR + 04h–07h Attribute: R/W
Secondary: BAR + 0Ch0Fh
Default Value: All bits undefined Size: 32 bits
Bit Description
7
PRD Interrupt Status (PRDIS)—R/WC.
0 = Software clears this bit by writing a 1 to it.
1 = This bit is set when the host controller execution of a PRD that has its PRD_INT bit
set.
6 Reserved
5
Drive 0 DMA Capable—R/W.
0 = Not Capable
1 = Capable. Set by device dependent code (BIOS or device driver) to indicate that
drive 0 for this channel is capable of DMA transfers, and that the controller has
been initialized for optimum performance. The PCH does not use this bit. It is
intended for systems that do not attach BMIDE to the PCI bus.
4:3 Reserved
2
Interrupt—R/WC.
0 = Software clears this bit by writing a 1 to it.
1 = Set when a device FIS is received with theI bit set, provided that software has not
disabled interrupts using the IEN bit of the Device Control Register (see chapter 5
of the Serial ATA Specification, Revision 1.0a).
1
Error—R/WC.
0 = Software clears this bit by writing a 1 to it.
1 = This bit is set when the controller encounters a target abort or master abort when
transferring data on PCI.
0
Bus Master IDE Active (ACT)—RO.
0 = This bit is cleared by the PCH when the last transfer for a region is performed,
where EOT for that region is set in the region descriptor. It is also cleared by the
PCH when the Start Bus Master bit (D31:F5:BAR+ 00h, bit 0) is cleared in the
Command register. When this bit is read as a 0, all data transferred from the drive
during the previous bus master command is visible in system memory, unless the
bus master command was aborted.
1 = Set by the PCH when the Start bit is written to the Command register.
Bit Description
31:2
Address of Descriptor Table (ADDR)—R/W. The bits in this field correspond to bits
[31:2] of the memory location of the Physical Region Descriptor (PRD). The Descriptor
Table must be DWord-aligned. The Descriptor Table must not cross a 64-K boundary in
memory.
1:0 Reserved
SATA Controller Registers (D31:F5)
658 Datasheet
15.3 Serial ATA Index/Data Pair Superset Registers
All of these I/O registers are in the core well. They are exposed only when SCC is 01h
(that is, IDE programming interface) and the controller is not in combined mode. These
are Index/Data Pair registers that are used to access the SerialATA superset registers
(SerialATA Status, SerialATA Control and SerialATA Error). The I/O space for these
registers is allocated through SIDPBA. Locations with offset from 08h to 0Fh are
reserved for future expansion. Software-write operations to the reserved locations shall
have no effect while software-read operations to the reserved locations shall return 0.
15.3.1 SINDX—SATA Index Register (D31:F5)
Address Offset: SIDPBA + 00h Attribute: R/W
Default Value: 00000000h Size: 32 bits
Note: These are Index/Data Pair Registers that are used to access the SSTS, SCTL, and
SERR. The I/O space for these registers is allocated through SIDPBA.
15.3.2 SDATA—SATA Index Data Register (D31:F5)
Address Offset: SIDPBA + 04h Attribute: R/W
Default Value: All bits undefined Size: 32 bits
Note: These are Index/Data Pair Registers that are used to access the SSTS, SCTL, and
SERR. The I/O space for these registers is allocated through SIDPBA.
Bit Description
31:16 Reserved
15:8
Port Index (PIDX)—R/W. This Index field is used to specify the port of the SATA
controller at which the port-specific SSTS, SCTL, and SERR registers are located.
00h = Primary Master (Port 4)
02h = Secondary Master (Port 5)
All other values are Reserved.
7:0
Register Index (RIDX)—R/W. This Index field is used to specify one out of three
registers currently being indexed into.
00h = SSTS
01h = SCTL
02h = SERR
All other values are Reserved
Bit Description
31:0
Data (DATA)—R/W. This Data register is a “window” through which data is read or
written to the memory mapped registers. A read or write to this Data register triggers a
corresponding read or write to the memory mapped register pointed to by the Index
register. The Index register must be setup prior to the read or write to this Data
register.
Note that a physical register is not actually implemented as the data is actually stored
in the memory mapped registers.
Since this is not a physical register, the “default” value is the same as the default value
of the register pointed to by Index.
Datasheet 659
SATA Controller Registers (D31:F5)
15.3.2.1 PxSSTS—Serial ATA Status Register (D31:F5)
Address Offset: Attribute: RO
Default Value: 00000000h Size: 32 bits
SDATA when SINDX.RIDX is 00h. This is a 32-bit register that conveys the current state
of the interface and host. The PCH updates it continuously and asynchronously. When
the PCH transmits a COMRESET to the device, this register is updated to its reset
values.
Bit Description
31:12 Reserved
11:8
Interface Power Management (IPM)—RO. Indicates the current interface state:
All other values reserved.
7:4
Current Interface Speed (SPD)—RO. Indicates the negotiated interface
communication speed.
All other values reserved.
The PCH Supports Gen 1 communication rates (1.5 Gb/s) and Gen 2 rates
(3.0 Gb/s).
3:0
Device Detection (DET)—RO. Indicates the interface device detection and Phy state:
All other values reserved.
Value Description
0h Device not present or communication not established
1h Interface in active state
2h Interface in PARTIAL power management state
6h Interface in SLUMBER power management state
Value Description
0h Device not present or communication not established
1h Generation 1 communication rate negotiated
2h Generation 2 communication rate negotiated
Value Description
0h No device detected and Phy communication not established
1h Device presence detected but Phy communication not established
3h Device presence detected and Phy communication established
4h Phy in offline mode as a result of the interface being disabled or
running in a BIST loopback mode
SATA Controller Registers (D31:F5)
660 Datasheet
15.3.2.2 PxSCTL—Serial ATA Control Register (D31:F5)
Address Offset: Attribute: R/W, RO
Default Value: 00000004h Size: 32 bits
SDATA when SINDX.RIDX is 01h. This is a 32-bit read-write register by which software
controls SATA capabilities. Writes to the SControl register result in an action being
taken by the PCH or the interface. Reads from the register return the last value written
to it.
Bit Description
31:16 Reserved
15:12 Select Power Management (SPM)—RO. This field is not used by AHCI.
11:8
Interface Power Management Transitions Allowed (IPM)—R/W. Indicates which
power states the PCH is allowed to transition to:
All other values reserved
7:4
Speed Allowed (SPD)—R/W. Indicates the highest allowable speed of the interface.
This speed is limited by the CAP.ISS (ABAR+00h:bit 23:20) field.
All other values reserved.
The PCH Supports Gen 1 communication rates (1.5 Gb/s) and Gen 2 rates
(3.0 Gb/s).
3:0
Device Detection Initialization (DET)—R/W. Controls the PCH’s device detection
and interface initialization.
All other values reserved.
Value Description
0h No interface restrictions
1h Transitions to the PARTIAL state disabled
2h Transitions to the SLUMBER state disabled
3h Transitions to both PARTIAL and SLUMBER states disabled
Value Description
0h No speed negotiation restrictions
1h Limit speed negotiation to Generation 1 communication rate
2h Limit speed negotiation to Generation 2 communication rate
Value Description
0h No device detection or initialization action requested
1h
Perform interface communication initialization sequence to
establish communication. This is functionally equivalent to a hard
reset and results in the interface being reset and communications
re-initialized
4h Disable the Serial ATA interface and put Phy in offline mode
Datasheet 661
SATA Controller Registers (D31:F5)
15.3.2.3 PxSERR—Serial ATA Error Register (D31:F5)
Address Offset: Attribute: R/WC
Default Value: 00000000h Size: 32 bits
SDATA when SINDx.RIDX is 02h. Bits 26:16 of this register contain diagnostic error
information for use by diagnostic software in validating correct operation or isolating
failure modes. Bits 11:0 contain error information used by host software in determining
the appropriate response to the error condition. If one or more of bits 11:8 of this
register are set, the controller will stop the current transfer.
Bit Description
31:27 Reserved
26
Exchanged (X)—R/WC. When set to 1, this bit indicates that a change in device
presence has been detected since the last time this bit was cleared. This bit shall always
be set to 1 anytime a COMINIT signal is received. This bit is reflected in the P0IS.PCS
bit.
25 Unrecognized FIS Type (F)—R/WC. Indicates that one or more FISs were received by
the Transport layer with good CRC, but had a type field that was not recognized.
24
Transport state transition error (T)—R/WC. Indicates that an error has occurred in
the transition from one state to another within the Transport layer since the last time
this bit was cleared.
23
Link Sequence Error (S)—R/WC: Indicates that one or more Link state machine error
conditions was encountered. The Link Layer state machine defines the conditions under
which the link layer detects an erroneous transition.
22
Handshake (H)—R/WC. Indicates that one or more R_ERR handshake response was
received in response to frame transmission. Such errors may be the result of a CRC
error detected by the recipient, a disparity or 8b/10b decoding error, or other error
condition leading to a negative handshake on a transmitted frame.
21 CRC Error (C)—R/WC. Indicates that one or more CRC errors occurred with the Link
Layer.
20 Disparity Error (D)—R/WC. This field is not used by AHCI.
19 10b to 8b Decode Error (B)—R/WC. Indicates that one or more 10b to 8b decoding
errors occurred.
18 Comm Wake (W)—R/WC. Indicates that a Comm Wake signal was detected by the
Phy.
17 Phy Internal Error (I)—R/WC. Indicates that the Phy detected some internal error.
16
PhyRdy Change (N)—R/WC. When set to 1, this bit indicates that the internal PhyRdy
signal changed state since the last time this bit was cleared. In the PCH, this bit will be
set when PhyRdy changes from a 0 -> 1 or a 1 -> 0. The state of this bit is then
reflected in the PxIS.PRCS interrupt status bit and an interrupt will be generated if
enabled. Software clears this bit by writing a 1 to it.
15:12 Reserved
11 Internal Error (E)—R/WC. The SATA controller failed due to a master or target abort
when attempting to access system memory.
10
Protocol Error (P)—R/WC. A violation of the Serial ATA protocol was detected.
NOTE: The PCH does not set this bit for all protocol violations that may occur on the
SATA link.
SATA Controller Registers (D31:F5)
662 Datasheet
§ §
9
Persistent Communication or Data Integrity Error (C)—R/WC. A communication
error that was not recovered occurred that is expected to be persistent. Persistent
communications errors may arise from faulty interconnect with the device, from a
device that has been removed or has failed, or a number of other causes.
8Transient Data Integrity Error (T)—R/WC. A data integrity error occurred that was
not recovered by the interface.
7:2 Reserved
1
Recovered Communications Error (M)—R/WC. Communications between the device
and host was temporarily lost but was re-established. This can arise from a device
temporarily being removed, from a temporary loss of Phy synchronization, or from other
causes and may be derived from the PhyNRdy signal between the Phy and Link layers.
0Recovered Data Integrity Error (I)—R/WC. A data integrity error occurred that was
recovered by the interface through a retry operation or other recovery action.
Bit Description
Datasheet 663
EHCI Controller Registers (D29:F0, D26:F0)
16 EHCI Controller Registers
(D29:F0, D26:F0)
16.1 USB EHCI Configuration Registers
(USB EHCI—D29:F0, D26:F0)
Note: Prior to BIOS initialization of the PCH USB subsystem, the EHCI controllers will appear
as Function 7. After BIOS initialization, the EHCI controllers will be Function 0.
Note: Register address locations that are not shown in Ta b l e 16-1 should be treated as
Reserved (see Section 9.2 for details).
Table 16-1. USB EHCI PCI Register Address Map (USB EHCI—D29:F0, D26:F0) (Sheet 1 of
2)
Offset Mnemonic Register Name Default Value Type
00h–01h VID Vendor Identification 8086h RO
02h–03h DID Device Identification See register
description RO
04h–05h PCICMD PCI Command 0000h R/W, RO
06h–07h PCISTS PCI Status 0290h R/WC, RO
08h RID Revision Identification See register
description RO
09h PI Programming Interface 20h RO
0Ah SCC Sub Class Code 03h RO
0Bh BCC Base Class Code 0Ch RO
0Dh PMLT Primary Master Latency Timer 00h RO
0Eh HEADTYP Header Type 80h RO
10h–13h MEM_BASE Memory Base Address 00000000h R/W, RO
2Ch–2Dh SVID USB EHCI Subsystem Vendor
Identification XXXXh R/W
2Eh–2Fh SID USB EHCI Subsystem
Identification XXXXh R/W
34h CAP_PTR Capabilities Pointer 50h RO
3Ch INT_LN Interrupt Line 00h R/W
3Dh INT_PN Interrupt Pin See register
description RO
50h PWR_CAPID PCI Power Management
Capability ID 01h RO
51h NXT_PTR1 Next Item Pointer 58h R/W
52h–53h PWR_CAP Power Management Capabilities C9C2h R/W
54h–55h PWR_CNTL_STS Power Management Control/
Status 0000h R/W, R/WC,
RO
58h DEBUG_CAPID Debug Port Capability ID 0Ah RO
EHCI Controller Registers (D29:F0, D26:F0)
664 Datasheet
Note: All configuration registers in this section are in the core well and reset by a core well
reset and the D3-to-D0 warm reset, except as noted.
16.1.1 VID—Vendor Identification Register
(USB EHCI—D29:F0, D26:F0)
Offset Address: 00h01h Attribute: RO
Default Value: 8086h Size: 16 bits
59h NXT_PTR2 Next Item Pointer #2 98h RO
5Ah–5Bh DEBUG_BASE Debug Port Base Offset 20A0h RO
60h USB_RELNUM USB Release Number 20h RO
61h FL_ADJ Frame Length Adjustment 20h R/W
62h–63h PWAKE_CAP Port Wake Capabilities 01FFh R/W
64h–67h Reserved
68h–6Bh LEG_EXT_CAP USB EHCI Legacy Support
Extended Capability 00000001h R/W, RO
6Ch–6Fh LEG_EXT_CS USB EHCI Legacy Extended
Support Control/Status 00000000h R/W, R/WC,
RO
70h–73h SPECIAL_SMI Intel Specific USB 2.0 SMI 00000000h R/W, R/WC
74h–7Fh Reserved
80h ACCESS_CNTL Access Control 00h R/W
84h EHCIIR1 EHCI Initialization Register 1 03081F01h R/W, RWL
88h–8Bh EHCIIR2 EHCI Initialization Register 2 04000010h R/W
98h FLR_CID FLR Capability ID 09h RO
99h FLR_NEXT FLR Next Capability Pointer 00h RO
9Ah–9Bh FLR_CLV FLR Capability Length and
Version 2006h RO, R/WO
9Ch FLR_CTRL FLR Control 00h R/W
9Dh FLR_STAT FLR Status 00h RO
F4h–F7h EHCIIR3 EHCI Initialization Register 3 00408588h R/W
FCh–FFh EHCIIR4 EHCI Initialization Register 4 20591708h R/W
Table 16-1. USB EHCI PCI Register Address Map (USB EHCI—D29:F0, D26:F0) (Sheet 2 of
2)
Offset Mnemonic Register Name Default Value Type
Bit Description
15:0 Vendor ID—RO. This is a 16-bit value assigned to Intel.
Datasheet 665
EHCI Controller Registers (D29:F0, D26:F0)
16.1.2 DID—Device Identification Register
(USB EHCI—D29:F0, D26:F0)
Offset Address: 02h03h Attribute: RO
Default Value: See bit description Size: 16 bits
16.1.3 PCICMD—PCI Command Register
(USB EHCI—D29:F0, D26:F0)
Address Offset: 04h05h Attribute: R/W, RO
Default Value: 0000h Size: 16 bits
Bit Description
15:0
Device ID—RO. This is a 16-bit value assigned to the PCH USB EHCI controller. See
the Intel® 5 Series Chipset and Intel® 3400 Series Chipset Specification Update for the
value of the Device ID Register.
Bit Description
15:11 Reserved
10
Interrupt Disable—R/W.
0 = The function is capable of generating interrupts.
1 = The function can not generate its interrupt to the interrupt controller.
Note that the corresponding Interrupt Status bit (D29:F0, D26:F0:06h, bit 3) is not
affected by the interrupt enable.
9 Fast Back to Back Enable (FBE)—RO. Hardwired to 0.
8
SERR# Enable (SERR_EN)—R/W.
0 = Disables EHC’s capability to generate an SERR#.
1 = The Enhanced Host controller (EHC) is capable of generating (internally) SERR# in
the following cases:
When it receive a completion status other than “successful” for one of its DMA
initiated memory reads on DMI (and subsequently on its internal interface).
When it detects an address or command parity error and the Parity Error
Response bit is set.
When it detects a data parity error (when the data is going into the EHC) and
the Parity Error Response bit is set.
7 Wait Cycle Control (WCC)—RO. Hardwired to 0.
6
Parity Error Response (PER)—R/W.
0 = The EHC is not checking for correct parity (on its internal interface).
1 = The EHC is checking for correct parity (on its internal interface) and halt operation
when bad parity is detected during the data phase.
NOTE: If the EHC detects bad parity on the address or command phases when the bit is
set to 1, the host controller does not take the cycle. It halts the host controller
(if currently not halted) and sets the Host System Error bit in the USBSTS
register. This applies to both requests and completions from the system
interface.
This bit must be set for the parity errors to generate SERR#.
5 VGA Palette Snoop (VPS)—RO. Hardwired to 0.
4 Postable Memory Write Enable (PMWE)—RO. Hardwired to 0.
3 Special Cycle Enable (SCE)—RO. Hardwired to 0.
EHCI Controller Registers (D29:F0, D26:F0)
666 Datasheet
16.1.4 PCISTS—PCI Status Register
(USB EHCI—D29:F0, D26:F0)
Address Offset: 06h07h Attribute: R/WC, RO
Default Value: 0290h Size: 16 bits
Note: For the writable bits, software must write a 1 to clear bits that are set. Writing a 0 to
the bit has no effect.
2
Bus Master Enable (BME)—R/W.
0 = Disables this functionality.
1 = Enables the PCH to act as a master on the PCI bus for USB transfers.
1
Memory Space Enable (MSE)—R/W. This bit controls access to the USB 2.0 Memory
Space registers.
0 = Disables this functionality.
1 = Enables accesses to the USB 2.0 registers. The Base Address register (D29:F0,
D26:F0:10h) for USB 2.0 should be programmed before this bit is set.
0 I/O Space Enable (IOSE)—RO. Hardwired to 0.
Bit Description
Bit Description
15
Detected Parity Error (DPE)—R/WC.
0 = No parity error detected.
1 = This bit is set by the PCH when a parity error is seen by the EHCI controller,
regardless of the setting of bit 6 or bit 8 in the Command register or any other
conditions.
14
Signaled System Error (SSE)R/WC.
0 = No SERR# signaled by the PCH.
1 = This bit is set by the PCH when it signals SERR# (internally). The SER_EN bit (bit 8
of the Command Register) must be 1 for this bit to be set.
13
Received Master Abort (RMA)—R/WC.
0 = No master abort received by EHC on a memory access.
1 = This bit is set when EHC, as a master, receives a master abort status on a memory
access. This is treated as a Host Error and halts the DMA engines. This event can
optionally generate an SERR# by setting the SERR# Enable bit.
12
Received Target Abort (RTA)—R/WC.
0 = No target abort received by EHC on memory access.
1 = This bit is set when EHC, as a master, receives a target abort status on a memory
access. This is treated as a Host Error and halts the DMA engines. This event can
optionally generate an SERR# by setting the SERR# Enable bit (D29:F0,
D26:F0:04h, bit 8).
11
Signaled Target Abort (STA)—RO. This bit is used to indicate when the EHCI function
responds to a cycle with a target abort. There is no reason for this to happen, so this bit
is hardwired to 0.
10:9 DEVSEL# Timing Status (DEVT_STS)—RO. This 2-bit field defines the timing for
DEVSEL# assertion.
8
Master Data Parity Error Detected (DPED)—R/WC.
0 = No data parity error detected on USB2.0 read completion packet.
1 = This bit is set by the PCH when a data parity error is detected on a USB 2.0 read
completion packet on the internal interface to the EHCI host controller and bit 6 of
the Command register is set to 1.
Datasheet 667
EHCI Controller Registers (D29:F0, D26:F0)
16.1.5 RID—Revision Identification Register
(USB EHCI—D29:F0, D26:F0)
Offset Address: 08h Attribute: RO
Default Value: See bit description Size: 8 bits
16.1.6 PI—Programming Interface Register
(USB EHCI—D29:F0, D26:F0)
Address Offset: 09h Attribute: RO
Default Value: 20h Size: 8 bits
16.1.7 SCC—Sub Class Code Register
(USB EHCI—D29:F0, D26:F0)
Address Offset: 0Ah Attribute: RO
Default Value: 03h Size: 8 bits
7 Fast Back to Back Capable (FB2BC)—RO. Hardwired to 1.
6 User Definable Features (UDF)—RO. Hardwired to 0.
5 66 MHz Capable (66 MHz _CAP)—RO. Hardwired to 0.
4Capabilities List (CAP_LIST)—RO. Hardwired to 1 indicating that offset 34h contains a
valid capabilities pointer.
3
Interrupt Status—RO. This bit reflects the state of this function’s interrupt at the
input of the enable/disable logic.
0 = This bit will be 0 when the interrupt is de-asserted.
1 = This bit is a 1 when the interrupt is asserted.
The value reported in this bit is independent of the value in the Interrupt Enable bit.
2:0 Reserved
Bit Description
Bit Description
7:0 Revision ID—RO. See the Intel® 5 Series Chipset and Intel® 3400 Series Chipset
Specification Update for the value of the Revision ID Register
Bit Description
7:0 Programming Interface—RO. A value of 20h indicates that this USB 2.0 host
controller conforms to the EHCI Specification.
Bit Description
7:0 Sub Class Code (SCC)—RO.
03h = Universal serial bus host controller.
EHCI Controller Registers (D29:F0, D26:F0)
668 Datasheet
16.1.8 BCC—Base Class Code Register
(USB EHCI—D29:F0, D26:F0)
Address Offset: 0Bh Attribute: RO
Default Value: 0Ch Size: 8 bits
16.1.9 PMLT—Primary Master Latency Timer Register
(USB EHCI—D29:F0, D26:F0)
Address Offset: 0Dh Attribute: RO
Default Value: 00h Size: 8 bits
16.1.10 HEADTYP—Header Type Register
(USB EHCI—D29:F0, D26:F0)
Address Offset: 0Eh Attribute: RO
Default Value: 80h Size: 8 bits
Bit Description
7:0 Base Class Code (BCC)—RO.
0Ch = Serial bus controller.
Bit Description
7:0
Master Latency Timer Count (MLTC)—RO. Hardwired to 00h. Because the EHCI
controller is internally implemented with arbitration on an interface (and not PCI), it
does not need a master latency timer.
Bit Description
7
Multi-Function Device—RO. When set to ‘1’ indicates this is a multifunction device:
0 = Single-function device
1 = Multi-function device.
When RMH is enabled, this bit defaults to 1. When RMH is disabled, this bit defaults to
0.
6:0 Configuration Layout. Hardwired to 00h, which indicates the standard PCI configuration
layout.
Datasheet 669
EHCI Controller Registers (D29:F0, D26:F0)
16.1.11 MEM_BASE—Memory Base Address Register
(USB EHCI—D29:F0, D26:F0)
Address Offset: 10h13h Attribute: R/W, RO
Default Value: 00000000h Size: 32 bits
16.1.12 SVID—USB EHCI Subsystem Vendor ID Register
(USB EHCI—D29:F0, D26:F0)
Address Offset: 2Ch2Dh Attribute: R/W
Default Value: XXXXh Size: 16 bits
Reset: None
16.1.13 SID—USB EHCI Subsystem ID Register
(USB EHCI—D29:F0, D26:F0)
Address Offset: 2Eh2Fh Attribute: R/W
Default Value: XXXXh Size: 16 bits
Reset: None
Bit Description
31:10 Base Address—R/W. Bits [31:10] correspond to memory address signals [31:10],
respectively. This gives 1-KB of locatable memory space aligned to 1-KB boundaries.
9:4 Reserved
3Prefetchable—RO. Hardwired to 0 indicating that this range should not be prefetched.
2:1 Type—RO. Hardwired to 00b indicating that this range can be mapped anywhere within
32-bit address space.
0Resource Type Indicator (RTE)—RO. Hardwired to 0 indicating that the base
address field in this register maps to memory space.
Bit Description
15:0
Subsystem Vendor ID (SVID)—R/W. This register, in combination with the USB 2.0
Subsystem ID register, enables the operating system to distinguish each subsystem
from the others.
NOTE: Writes to this register are enabled when the WRT_RDONLY bit (D29:F0,
D26:F0:80h, bit 0) is set to 1.
Bit Description
15:0
Subsystem ID (SID)—R/W. BIOS sets the value in this register to identify the
Subsystem ID. This register, in combination with the Subsystem Vendor ID register,
enables the operating system to distinguish each subsystem from other(s).
NOTE: Writes to this register are enabled when the WRT_RDONLY bit (D29:F0,
D26:F0:80h, bit 0) is set to 1.
EHCI Controller Registers (D29:F0, D26:F0)
670 Datasheet
16.1.14 CAP_PTR—Capabilities Pointer Register
(USB EHCI—D29:F0, D26:F0)
Address Offset: 34h Attribute: RO
Default Value: 50h Size: 8 bits
16.1.15 INT_LN—Interrupt Line Register
(USB EHCI—D29:F0, D26:F0)
Address Offset: 3Ch Attribute: R/W
Default Value: 00h Size: 8 bits
Function Level Reset: No
16.1.16 INT_PN—Interrupt Pin Register
(USB EHCI—D29:F0, D26:F0)
Address Offset: 3Dh Attribute: RO
Default Value: See Description Size: 8 bits
16.1.17 PWR_CAPID—PCI Power Management Capability ID
Register (USB EHCI—D29:F0, D26:F0)
Address Offset: 50h Attribute: RO
Default Value: 01h Size: 8 bits
Bit Description
7:0 Capabilities Pointer (CAP_PTR)RO. This register points to the starting offset of the
USB 2.0 capabilities ranges.
Bit Description
7:0
Interrupt Line (INT_LN)—R/W. This data is not used by the PCH. It is used as a
scratchpad register to communicate to software the interrupt line that the interrupt pin
is connected to.
Bit Description
7:0
Interrupt Pin—RO. This reflects the value of D29IP.E1IP (Chipset Config
Registers:Offset 3108:bits 3:0) or D26IP.E2IP (Chipset Config Registers:Offset
3114:bits 3:0).
NOTE: Bits 7:4 are always 0h.
Bit Description
7:0 Power Management Capability ID—RO. A value of 01h indicates that this is a PCI
Power Management capabilities field.
Datasheet 671
EHCI Controller Registers (D29:F0, D26:F0)
16.1.18 NXT_PTR1—Next Item Pointer #1 Register
(USB EHCI—D29:F0, D26:F0)
Address Offset: 51h Attribute: R/W
Default Value: 58h Size: 8 bits
16.1.19 PWR_CAP—Power Management Capabilities Register
(USB EHCI—D29:F0, D26:F0)
Address Offset: 52h53h Attribute: R/W, RO
Default Value: C9C2h Size: 16 bits
NOTES:
1. Normally, this register is read-only to report capabilities to the power management
software. To report different power management capabilities, depending on the system in
which the PCH is used, bits 15:11 and 8:6 in this register are writable when the
WRT_RDONLY bit (D29:F0, D26:F0:80h, bit 0) is set. The value written to this register
does not affect the hardware other than changing the value returned during a read.
2. Reset: core well, but not D3-to-D0 warm reset.
Bit Description
7:0
Next Item Pointer 1 Value—R/W (special). This register defaults to 58h, which
indicates that the next capability registers begin at configuration offset 58h. This
register is writable when the WRT_RDONLY bit (D29:F0, D26:F0:80h, bit 0) is set. This
allows BIOS to effectively hide the Debug Port capability registers, if necessary. This
register should only be written during system initialization before the plug-and-play
software has enabled any master-initiated traffic. Only values of 58h (Debug Port and
FLR capabilities visible) and 98h (Debug Port invisible, next capability is FLR) are
expected to be programmed in this register.
NOTE: Register not reset by D3-to-D0 warm reset.
Bit Description
15:11
PME Support (PME_SUP)—R/W. This 5-bit field indicates the power states in which
the function may assert PME#. The PCH EHC does not support the D1 or D2 states. For
all other states, the PCH EHC is capable of generating PME#. Software should never
need to modify this field.
10 D2 Support (D2_SUP)RO.
0 = D2 State is not supported
9D1 Support (D1_SUP)—RO.
0 = D1 State is not supported
8:6 Auxiliary Current (AUX_CUR)—R/W. The PCH EHC reports 375 mA maximum
suspend well current required when in the D3COLD state.
5Device Specific Initialization (DSI)—RO. The PCH reports 0, indicating that no
device-specific initialization is required.
4 Reserved
3PME Clock (PME_CLK)—RO. The PCH reports 0, indicating that no PCI clock is
required to generate PME#.
2:0 Version (VER)—RO. The PCH reports 010b, indicating that it complies with Revision
1.1 of the PCI Power Management Specification.
EHCI Controller Registers (D29:F0, D26:F0)
672 Datasheet
16.1.20 PWR_CNTL_STS—Power Management Control/
Status Register (USB EHCI—D29:F0, D26:F0)
Address Offset: 54h55h Attribute: R/W, R/WC, RO
Default Value: 0000h Size: 16 bits
Function Level Reset: No (Bits 8 and 15 only)
NOTE: Reset (bits 15, 8): suspend well, and not D3-to-D0 warm reset nor core well reset.
Bit Description
15
PME Status—R/WC.
0 = Writing a 1 to this bit will clear it and cause the internal PME to de-assert (if
enabled).
1 = This bit is set when the PCH EHC would normally assert the PME# signal
independent of the state of the PME_En bit.
NOTE: This bit must be explicitly cleared by the operating system each time the
operating system is loaded.
This bit is not reset by Function Level Reset.
14:13 Data Scale—RO. Hardwired to 00b indicating it does not support the associated Data
register.
12:9 Data Select—RO. Hardwired to 0000b indicating it does not support the associated Data
register.
8
PME Enable—R/W.
0 = Disable.
1 = Enables the PCH EHC to generate an internal PME signal when PME_Status is 1.
NOTE: This bit must be explicitly cleared by the operating system each time it is
initially loaded.
This bit is not reset by Function Level Reset.
7:2 Reserved
1:0
Power State—R/W. This 2-bit field is used both to determine the current power state
of EHC function and to set a new power state. The definition of the field values are:
00 = D0 state
11 = D3HOT state
If software attempts to write a value of 10b or 01b in to this field, the write operation
completes normally; however, the data is discarded and no state change occurs.
When in the D3HOT state, the PCH does not accept accesses to the EHC memory range;
but the configuration space is still be accessible. When not in the D0 state, the
generation of the interrupt output is blocked. Specifically, the EHC Interrupt is not
asserted by the PCH when not in the D0 state.
When software changes this value from the D3HOT state to the D0 state, an internal
warm (soft) controlled reset is generated, and software must re-initialize the function.
Datasheet 673
EHCI Controller Registers (D29:F0, D26:F0)
16.1.21 DEBUG_CAPID—Debug Port Capability ID Register
(USB EHCI—D29:F0, D26:F0)
Address Offset: 58h Attribute: RO
Default Value: 0Ah Size: 8 bits
16.1.22 NXT_PTR2—Next Item Pointer #2 Register
(USB EHCI—D29:F0, D26:F0)
Address Offset: 59h Attribute: RO
Default Value: 98h Size: 8 bits
Function Level Reset: No
16.1.23 DEBUG_BASE—Debug Port Base Offset Register
(USB EHCI—D29:F0, D26:F0)
Address Offset: 5Ah5Bh Attribute: RO
Default Value: 20A0h Size: 16 bits
16.1.24 USB_RELNUM—USB Release Number Register
(USB EHCI—D29:F0, D26:F0)
Address Offset: 60h Attribute: RO
Default Value: 20h Size: 8 bits
Bit Description
7:0 Debug Port Capability ID—RO. Hardwired to 0Ah indicating that this is the start of a
Debug Port Capability structure.
Bit Description
7:0 Next Item Pointer 2 Capability—RO. This register points to the next capability in the
Function Level Reset capability structure.
Bit Description
15:13 BAR Number—RO. Hardwired to 001b to indicate the memory BAR begins at offset
10h in the EHCI configuration space.
12:0 Debug Port Offset—RO. Hardwired to 0A0h to indicate that the Debug Port registers
begin at offset A0h in the EHCI memory range.
Bit Description
7:0 USB Release Number—RO. A value of 20h indicates that this controller follows
Universal Serial Bus (USB) Specification, Revision 2.0.
EHCI Controller Registers (D29:F0, D26:F0)
674 Datasheet
16.1.25 FL_ADJ—Frame Length Adjustment Register
(USB EHCI—D29:F0, D26:F0)
Address Offset: 61h Attribute: R/W
Default Value: 20h Size: 8 bits
Function Level Reset: No
This feature is used to adjust any offset from the clock source that generates the clock
that drives the SOF counter. When a new value is written into these six bits, the length
of the frame is adjusted. Its initial programmed value is system dependent based on
the accuracy of hardware USB clock and is initialized by system BIOS. This register
should only be modified when the HChalted bit (D29:F0, D26:F0:CAPLENGTH + 24h,
bit 12) in the USB2.0_STS register is a 1. Changing value of this register while the host
controller is operating yields undefined results. It should not be reprogrammed by USB
system software unless the default or BIOS programmed values are incorrect, or the
system is restoring the register while returning from a suspended state.
These bits in suspend well and not reset by a D3-to-D0 warm rest or a core well reset.
Bit Description
7:6 Reserved—RO. These bits are reserved for future use and should read as 00b.
5:0
Frame Length Timing Value—R/W. Each decimal value change to this register
corresponds to 16 high-speed bit times. The SOF cycle time (number of SOF counter
clock periods to generate a SOF micro-frame length) is equal to 59488 + value in this
field. The default value is decimal 32 (20h), which gives a SOF cycle time of 60000.
Frame Length (# 480 MHz
Clocks) (decimal)
Frame Length Timing Value (this
register) (decimal)
59488 0
59504 1
59520 2
——
59984 31
60000 32
——
60480 62
Datasheet 675
EHCI Controller Registers (D29:F0, D26:F0)
16.1.26 PWAKE_CAP—Port Wake Capability Register
(USB EHCI—D29:F0, D26:F0)
Address Offset: 6263h Attribute: R/W
Default Value: 01FFh Size: 16 bits
Default Value: 07FFh
Function Level Reset: No
This register is in the suspend power well. The intended use of this register is to
establish a policy about which ports are to be used for wake events. Bit positions
1–8(D29) or 1–6(D26) in the mask correspond to a physical port implemented on the
current EHCI controller. A 1 in a bit position indicates that a device connected below the
port can be enabled as a wake-up device and the port may be enabled for disconnect/
connect or overcurrent events as wake-up events. This is an information-only mask
register. The bits in this register do not affect the actual operation of the EHCI host
controller. The system-specific policy can be established by BIOS initializing this
register to a system-specific value. System software uses the information in this
register when enabling devices and ports for remote wake-up.
These bits are not reset by a D3-to-D0 warm rest or a core well reset.
Bit Description
15:9 (D29)
15:7 (D26) Reserved
8:1 (D29)
6:1 (D26)
Port Wake Up Capability Mask—R/W. Bit positions 1 through 8 (Device 29) or 1
through 6(Device 26) correspond to a physical port implemented on this host
controller. For example, bit position 1 corresponds to port 1, bit position 2
corresponds to port 2, etc.
0Port Wake Implemented—R/W. A 1 in this bit indicates that this register is
implemented to software.
EHCI Controller Registers (D29:F0, D26:F0)
676 Datasheet
16.1.27 LEG_EXT_CAP—USB EHCI Legacy Support Extended
Capability Register (USB EHCI—D29:F0, D26:F0)
Address Offset: 686Bh Attribute: R/W, RO
Default Value: 00000001h Size: 32 bits
Power Well: Suspend
Function Level Reset: No
Note: These bits are not reset by a D3-to-D0 warm rest or a core well reset.
Bit Description
31:25 Reserved—RO. Hardwired to 00h
24
HC OS Owned Semaphore—R/W. System software sets this bit to request ownership
of the EHCI controller. Ownership is obtained when this bit reads as 1 and the HC BIOS
Owned Semaphore bit reads as clear.
23:17 Reserved—RO. Hardwired to 00h
16
HC BIOS Owned Semaphore—R/W. The BIOS sets this bit to establish ownership of
the EHCI controller. System BIOS will clear this bit in response to a request for
ownership of the EHCI controller by system software.
15:8 Next EHCI Capability Pointer—RO. Hardwired to 00h to indicate that there are no
EHCI Extended Capability structures in this device.
7:0 Capability ID—RO. Hardwired to 01h to indicate that this EHCI Extended Capability is
the Legacy Support Capability.
Datasheet 677
EHCI Controller Registers (D29:F0, D26:F0)
16.1.28 LEG_EXT_CS—USB EHCI Legacy Support Extended
Control / Status Register (USB EHCI—D29:F0, D26:F0)
Address Offset: 6C6Fh Attribute: R/W, R/WC, RO
Default Value: 00000000h Size: 32 bits
Power Well: Suspend
Function Level Reset: No
Note: These bits are not reset by a D3-to-D0 warm rest or a core well reset.
Bit Description
31
SMI on BAR—R/WC. Software clears this bit by writing a 1 to it.
0 = Base Address Register (BAR) not written.
1 = This bit is set to 1 when the Base Address Register (BAR) is written.
30
SMI on PCI Command—R/WC. Software clears this bit by writing a 1 to it.
0 = PCI Command (PCICMD) Register Not written.
1 = This bit is set to 1 when the PCI Command (PCICMD) Register is written.
29
SMI on OS Ownership Change—R/WC. Software clears this bit by writing a 1 to it.
0 = No HC OS Owned Semaphore bit change.
1 = This bit is set to 1 when the HC OS Owned Semaphore bit in the LEG_EXT_CAP
register (D29:F0, D26:F0:68h, bit 24) transitions from 1 to 0 or 0 to 1.
28:22 Reserved
21
SMI on Async Advance—RO. This bit is a shadow bit of the Interrupt on Async
Advance bit (D29:F0, D26:F0:CAPLENGTH + 24h, bit 5) in the USB2.0_STS register.
NOTE: To clear this bit system software must write a 1 to the Interrupt on Async
Advance bit in the USB2.0_STS register.
20
SMI on Host System Error—RO. This bit is a shadow bit of Host System Error bit in
the USB2.0_STS register (D29:F0, D26:F0:CAPLENGTH + 24h, bit 4).
NOTE: To clear this bit system software must write a 1 to the Host System Error bit in
the USB2.0_STS register.
19
SMI on Frame List Rollover—RO. This bit is a shadow bit of Frame List Rollover bit
(D29:F0, D26:F0:CAPLENGTH + 24h, bit 3) in the USB2.0_STS register.
NOTE: To clear this bit system software must write a 1 to the Frame List Rollover bit in
the USB2.0_STS register.
18
SMI on Port Change Detect—RO. This bit is a shadow bit of Port Change Detect bit
(D29:F0, D26:F0:CAPLENGTH + 24h, bit 2) in the USB2.0_STS register.
NOTE: To clear this bit system software must write a 1 to the Port Change Detect bit in
the USB2.0_STS register.
17
SMI on USB Error—RO. This bit is a shadow bit of USB Error Interrupt (USBERRINT)
bit (D29:F0, D26:F0:CAPLENGTH + 24h, bit 1) in the USB2.0_STS register.
NOTE: To clear this bit system software must write a 1 to the USB Error Interrupt bit in
the USB2.0_STS register.
16
SMI on USB Complete—RO. This bit is a shadow bit of USB Interrupt (USBINT) bit
(D29:F0, D26:F0:CAPLENGTH + 24h, bit 0) in the USB2.0_STS register.
NOTE: To clear this bit system software must write a 1 to the USB Interrupt bit in the
USB2.0_STS register.
EHCI Controller Registers (D29:F0, D26:F0)
678 Datasheet
15
SMI on BAR Enable—R/W.
0 = Disable.
1 = Enable. When this bit is 1 and SMI on BAR (D29:F0, D26:F0:6Ch, bit 31) is 1, then
the host controller will issue an SMI.
14
SMI on PCI Command Enable—R/W.
0 = Disable.
1 = Enable. When this bit is 1 and SMI on PCI Command (D29:F0, D26:F0:6Ch, bit 30)
is 1, then the host controller will issue an SMI.
13
SMI on OS Ownership Enable—R/W.
0 = Disable.
1 = Enable. When this bit is a 1 AND the OS Ownership Change bit (D29:F0,
D26:F0:6Ch, bit 29) is 1, the host controller will issue an SMI.
12:6 Reserved
5
SMI on Async Advance Enable—R/W.
0 = Disable.
1 = Enable. When this bit is a 1, and the SMI on Async Advance bit (D29:F0,
D26:F0:6Ch, bit 21) is a 1, the host controller will issue an SMI immediately.
4
SMI on Host System Error Enable—R/W.
0 = Disable.
1 = Enable. When this bit is a 1, and the SMI on Host System Error (D29:F0,
D26:F0:6Ch, bit 20) is a 1, the host controller will issue an SMI.
3
SMI on Frame List Rollover Enable—R/W.
0 = Disable.
1 = Enable. When this bit is a 1, and the SMI on Frame List Rollover bit (D29:F0,
D26:F0:6Ch, bit 19) is a 1, the host controller will issue an SMI.
2
SMI on Port Change Enable—R/W.
0 = Disable.
1 = Enable. When this bit is a 1, and the SMI on Port Change Detect bit (D29:F0,
D26:F0:6Ch, bit 18) is a 1, the host controller will issue an SMI.
1
SMI on USB Error Enable—R/W.
0 = Disable.
1 = Enable. When this bit is a 1, and the SMI on USB Error bit (D29:F0, D26:F0:6Ch,
bit 17) is a 1, the host controller will issue an SMI immediately.
0
SMI on USB Complete Enable—R/W.
0 = Disable.
1 = Enable. When this bit is a 1, and the SMI on USB Complete bit (D29:F0,
D26:F0:6Ch, bit 16) is a 1, the host controller will issue an SMI immediately.
Bit Description
Datasheet 679
EHCI Controller Registers (D29:F0, D26:F0)
16.1.29 SPECIAL_SMI—Intel Specific USB 2.0 SMI Register
(USB EHCI—D29:F0, D26:F0)
Address Offset: 70h73h Attribute: R/W, R/WC
Default Value: 00000000h Size: 32 bits
Power Well: Suspend
Function Level Reset: No
Note: These bits are not reset by a D3-to-D0 warm rest or a core well reset.
Bit Description
31:30 (D29)
31:28 (D26) Reserved
29:22 (D29)
27:22 (D26)
SMI on PortOwner—R/WC. Software clears these bits by writing a 1 to it.
0 = No Port Owner bit change.
1 = Bits 29:22, 27:22 correspond to the Port Owner bits for ports 0 (22) through
5 (27) or 7 (29). These bits are set to 1 when the associated Port Owner bits
transition from 0 to 1 or 1 to 0.
21
SMI on PMCSR—R/WC. Software clears these bits by writing a 1 to it.
0 = Power State bits Not modified.
1 = Software modified the Power State bits in the Power Management Control/
Status (PMCSR) register (D29:F0, D26:F0:54h).
20
SMI on Async—R/WC. Software clears these bits by writing a 1 to it.
0 = No Async Schedule Enable bit change
1 = Async Schedule Enable bit transitioned from 1 to 0 or 0 to 1.
19
SMI on Periodic—R/WC. Software clears this bit by writing a 1 it.
0 = No Periodic Schedule Enable bit change.
1 = Periodic Schedule Enable bit transitions from 1 to 0 or 0 to 1.
18
SMI on CF—R/WC. Software clears this bit by writing a 1 it.
0 = No Configure Flag (CF) change.
1 = Configure Flag (CF) transitions from 1 to 0 or 0 to 1.
17
SMI on HCHalted—R/WC. Software clears this bit by writing a 1 it.
0 = HCHalted did Not transition to 1 (as a result of the Run/Stop bit being
cleared).
1 = HCHalted transitions to 1 (as a result of the Run/Stop bit being cleared).
16
SMI on HCReset—R/WC. Software clears this bit by writing a 1 it.
0 = HCRESET did Not transitioned to 1.
1 = HCRESET transitioned to 1.
15:14 Reserved
13:6
SMI on PortOwner Enable—R/W.
0 = Disable.
1 = Enable. When any of these bits are 1 and the corresponding SMI on
PortOwner bits are 1, then the host controller will issue an SMI. Unused
ports should have their corresponding bits cleared.
5
SMI on PMSCR Enable—R/W.
0 = Disable.
1 = Enable. When this bit is 1 and SMI on PMSCR is 1, then the host controller
will issue an SMI.
EHCI Controller Registers (D29:F0, D26:F0)
680 Datasheet
16.1.30 ACCESS_CNTL—Access Control Register
(USB EHCI—D29:F0, D26:F0)
Address Offset: 80h Attribute: R/W
Default Value: 00h Size: 8 bits
Function Level Reset: No
4
SMI on Async Enable—R/W.
0 = Disable.
1 = Enable. When this bit is 1 and SMI on Async is 1, then the host controller will
issue an SMI
3
SMI on Periodic Enable—R/W.
0 = Disable.
1 = Enable. When this bit is 1 and SMI on Periodic is 1, then the host controller
will issue an SMI.
2
SMI on CF Enable—R/W.
0 = Disable.
1 = Enable. When this bit is 1 and SMI on CF is 1, then the host controller will
issue an SMI.
1
SMI on HCHalted Enable—R/W.
0 = Disable.
1 = Enable. When this bit is a 1 and SMI on HCHalted is 1, then the host
controller will issue an SMI.
0
SMI on HCReset Enable—R/W.
0 = Disable.
1 = Enable. When this bit is a 1 and SMI on HCReset is 1, then host controller
will issue an SMI.
Bit Description
Bit Description
7:1 Reserved
0
WRT_RDONLY—R/W. When set to 1, this bit enables a select group of normally
read-only registers in the EHC function to be written by software. Registers that
may only be written when this mode is entered are noted in the summary tables
and detailed description as “Read/Write-Special”. The registers fall into two
categories:
1. System-configured parameters
2. Status bits
Datasheet 681
EHCI Controller Registers (D29:F0, D26:F0)
16.1.31 EHCIIR1—EHCI Initialization Register 1
(USB EHCI—D29:F0, D26:F0)
Address Offset: 84h–87h Attribute: R/W
Default Value: 83088E01h Size: 32 bits
16.1.32 EHCIIR2—EHCI Initialization Register 2 (USB
EHCI—D29:F0, D26:F0)
Offset Address: 88h–8Bh Attribute: R/W
Default Value: 04000010h Size: 32-bit
Bit Description
31:29 Reserved
28
EHCI Prefetch Entry Clear—R/W.
0 = EHC will clear prefetched entries in DMA.
1 = EHC will not clear prefetched entries in DMA
27:19 Reserved
18 EHCI Initialization Register 1 Field 2—R/W.
BIOS must set this bit to 1.
17:11 Reserved
10:8 EHCI Initialization Register 1 Field 1—R/W.
BIOS must set this field to 11.
7:5 Reserved
4
Pre-fetch Based Pause Enable—R/W.
0 = Pre-fetch Based Pause is disabled.
1 = Pre-fetch Based Pause is enabled.
3:0 Reserved
Bit Description
31:30 Reserved
29 EHCI Initialization Register 2 Field 6—R/W.
BIOS must set this bit to 0.
28:20 Reserved
19 EHCI Initialization Register 2 Field 5—R/W.
BIOS must set this bit to 1.
18:12 Reserved
11 EHCI Initialization Register 2 Field 4—R/W.
BIOS must set this bit to 1.
10 EHCI Initialization Register 2 Field 3—R/W.
BIOS must set this bit to 1.
9 Reserved
8EHCI Initialization Register 2 Field 2—R/W.
BIOS must set this bit to 1.
7:6 Reserved
5EHCI Initialization Register 2 Field 1—R/W.
BIOS must set this bit to 1.
4:0 Reserved
EHCI Controller Registers (D29:F0, D26:F0)
682 Datasheet
16.1.33 FLR_CID—Function Level Reset Capability ID
Register (USB EHCI—D29:F0, D26:F0)
Address Offset: 98h Attribute: RO
Default Value: 09h Size: 8 bits
Function Level Reset: No
16.1.34 FLR_NEXT—Function Level Reset Next Capability Pointer
Register (USB EHCI—D29:F0, D26:F0)
Address Offset: 99h Attribute: RO
Default Value: 00h Size: 8 bits
Function Level Reset: No
Bit Description
7:0
Capability ID—R0.
13h = If FLRCSSEL = 0
09h (Vendor Specific Capability) = If FLRCSSEL = 1
Bit Description
7:0 A value of 00h in this register indicates this is the last capability field.
Datasheet 683
EHCI Controller Registers (D29:F0, D26:F0)
16.1.35 FLR_CLV—Function Level Reset Capability Length and
Version Register (USB EHCI—D29:F0, D26:F0)
Address Offset: 9Ah–9Bh Attribute: R/WO, RO
Default Value: 2006h Size: 16 bits
Function Level Reset: No
When FLRCSSEL = 0, this register is defined as follows:
When FLRCSSEL = 1, this register is defined as follows:
16.1.36 FLR_CTRL—Function Level Reset Control Register
(USB EHCI—D29:F0, D26:F0)
Address Offset: 9Ch Attribute: R/W
Default Value: 00h Size: 8 bits
Function Level Reset: No
Bit Description
15:10 Reserved
9FLR Capability—R/WO.
1 = Support for Function Level Reset (FLR).
8
TXP Capability—R/WO.
1 = Support for Transactions Pending (TXP) bit. TXP must be supported if FLR is
supported.
7:0
Capability Length—RO. This field indicates the # of bytes of this vendor specific
capability as required by the PCI specification. It has the value of 06h for the FLR
capability.
Bit Description
15:12 Vendor Specific Capability ID—RO. A value of 2h in this field identifies this capability
as Function Level Reset.
11:8 Capability Version—RO. This field indicates the version of the FLR capability.
7:0
Capability Length—RO. This field indicates the # of bytes of this vendor specific
capability as required by the PCI specification. It has the value of 06h for the FLR
capability.
Bit Description
7:1 Reserved
0
Initiate FLR—R/W. This bit is used to initiate FLR transition. A write of 1 initiates FLR
transition. Since hardware must not respond to any cycles until FLR completion, the
value read by software from this bit is always 0.
EHCI Controller Registers (D29:F0, D26:F0)
684 Datasheet
16.1.37 FLR_STS—Function Level Reset Status Register
(USB EHCI—D29:F0, D26:F0)
Address Offset: 9Dh Attribute: RO
Default Value: 00h Size: 8 bits
Function Level Reset: No
16.1.38 EHCIIR3—EHCI Initialization Register 3 (USB
EHCI—D29:F0, D26:F0)
Offset Address: F4h–F7h Attribute: R/W
Default Value: 00408588h Size: 32-bit
16.1.39 EHCIIR4—EHCI Initialization Register 4 (USB
EHCI—D29:F0, D26:F0)
Offset Address: FCh–FFh Attribute: R/W
Default Value: 20591708h Size: 32-bit
Bit Description
7:1 Reserved
0
Transactions Pending (TXP)—RO.
0 = Completions for all non-posted requests have been received.
1 = Controller has issued non-posted requests which have no bee completed.
Bit Description
31
EHCIIR3 Write Enable—R/W.
0 = Writes to the EHCIIR3 register are disabled
1 = If set, the values of the EHCIIR3 register may be modified
30:24 Reserved
23:22 EHCI Initialization Register 3 Field 1—R/W.
BIOS must program this field to 10b.
21:0 Reserved
Bit Description
31:18 Reserved
17 EHCI Initialization Register 4 Field 2—R/W.
BIOS must set this bit to 1.
16 Reserved
15 EHCI Initialization Register 4 Field 1—R/W.
BIOS must set this bit to 1.
14:0 Reserved
Datasheet 685
EHCI Controller Registers (D29:F0, D26:F0)
16.2 Memory-Mapped I/O Registers
The EHCI memory-mapped I/O space is composed of two sets of registers: Capability
Registers and Operational Registers.
Note: The PCH EHCI controller will not accept memory transactions (neither reads nor writes)
as a target that are locked transactions. The locked transactions should not be
forwarded to PCI as the address space is known to be allocated to USB.
Note: When the EHCI function is in the D3 PCI power state, accesses to the USB 2.0 memory
range are ignored and result a master abort. Similarly, if the Memory Space Enable
(MSE) bit (D29:F0, D26:F0:04h, bit 1) is not set in the Command register in
configuration space, the memory range will not be decoded by the PCH enhanced host
controller (EHC). If the MSE bit is not set, the PCH must default to allowing any
memory accesses for the range specified in the BAR to go to PCI. This is because the
range may not be valid and, therefore, the cycle must be made available to any other
targets that may be currently using that range.
16.2.1 Host Controller Capability Registers
These registers specify the limits, restrictions and capabilities of the host controller
implementation. Within the host controller capability registers, only the structural
parameters register is writable. These registers are implemented in the suspend well
and is only reset by the standard suspend-well hardware reset, not by HCRESET or the
D3-to-D0 reset.
Note: Note that the EHCI controller does not support as a target memory transactions that
are locked transactions. Attempting to access the EHCI controller Memory-Mapped I/O
space using locked memory transactions will result in undefined behavior.
Note: Note that when the USB2 function is in the D3 PCI power state, accesses to the USB2
memory range are ignored and will result in a master abort. Similarly, if the Memory
Space Enable (MSE) bit is not set in the Command register in configuration space, the
memory range will not be decoded by the Enhanced Host Controller (EHC). If the MSE
bit is not set, the EHC will not claim any memory accesses for the range specified in the
BAR.
NOTE: “Read/Write Special” means that the register is normally read-only, but may be written
when the WRT_RDONLY bit is set. Because these registers are expected to be programmed
by BIOS during initialization, their contents must not get modified by HCRESET or D3-to-
D0 internal reset.
Table 16-2. Enhanced Host Controller Capability Registers
MEM_BASE
+ Offset Mnemonic Register Default Type
00h CAPLENGTH Capabilities Registers Length 20h RO
02h–03h HCIVERSION Host Controller Interface Version
Number 0100h RO
04h–07h HCSPARAMS Host Controller Structural
Parameters
00204208h
(D29:F0)
00203206
(D26:F0)
R/W
(special), RO
08h–0Bh HCCPARAMS Host Controller Capability
Parameters 00006881h RO
EHCI Controller Registers (D29:F0, D26:F0)
686 Datasheet
16.2.1.1 CAPLENGTH—Capability Registers Length Register
Offset: MEM_BASE + 00h Attribute: RO
Default Value: 20h Size: 8 bits
16.2.1.2 HCIVERSION—Host Controller Interface Version Number
Register
Offset: MEM_BASE + 02h03h Attribute: RO
Default Value: 0100h Size: 16 bits
16.2.1.3 HCSPARAMS—Host Controller Structural Parameters Register
Offset: MEM_BASE + 04h07h Attribute: R/W, RO
Default Value: 00204208h (D29:F0) Size: 32 bits
00203206h (D26:F0)
Function Level Reset: No
Note: This register is reset by a suspend well reset and not a D3-to-D0 reset or HCRESET.
NOTE: This register is writable when the WRT_RDONLY bit is set.
Bit Description
7:0
Capability Register Length Value—RO. This register is used as an offset to add to
the Memory Base Register (D29:F0, D26:F0:10h) to find the beginning of the
Operational Register Space. This field is hardwired to 20h indicating that the Operation
Registers begin at offset 20h.
Bit Description
15:0
Host Controller Interface Version Number—RO. This is a two-byte register
containing a BCD encoding of the version number of interface that this host controller
interface conforms.
Bit Description
31:24 Reserved
23:20
Debug Port Number (DP_N)—RO. Hardwired to 2h indicating that the Debug Port is
on the second lowest numbered port on the EHCI.
EHCI#1: Port 1
EHCI#2: Port 9
19:16 Reserved
15:12
Number of Companion Controllers (N_CC)—R/W. This field indicates the number of
companion controllers associated with this USB EHCI host controller.
BIOS must program this field to 0b to indicate companion host controllers are not
supported. Port-ownership hand-off is not supported. Only high-speed devices are
supported on the host controller root ports.
11:8
Number of Ports per Companion Controller (N_PCC)—RO. This field indicates the
number of ports supported per companion host controller. This field is 0h indication no
other companion controller support.
7:4 Reserved. These bits are reserved and default to 0.
3:0
N_PORTS—R/W. This field specifies the number of physical downstream ports
implemented on this host controller. The value of this field determines how many port
registers are addressable in the Operational Register Space. Valid values are in the
range of 1h to Fh. A 0 in this field is undefined.
For Integrated USB 2.0 Rate Matching Hub Enabled: Each EHCI reports 2 ports by
default. Port 0 assigned to the RMH and port 1 assigned as the debug port. When the
KVM/USB-R feature is enabled it will show up as Port2 on the EHCI, and BIOS would
need to update this field to 3h.
Datasheet 687
EHCI Controller Registers (D29:F0, D26:F0)
16.2.1.4 HCCPARAMS—Host Controller Capability Parameters
Register
Offset: MEM_BASE + 08h0Bh Attribute: RO
Default Value: 00006881h Size: 32 bits
Bit Description
31:18 Reserved
17 Asynchronous Schedule Update Capability (ASUC)—R/W. There is no functionality
associated with this bit.
16
Periodic Schedule Update Capability (PSUC)—RO. This field is hardwired to 0b to
indicate that the EHC hardware supports the Periodic Schedule Update Event Flag in the
USB2.0_CMD register.
15:8
EHCI Extended Capabilities Pointer (EECP)—RO. This field is hardwired to 68h,
indicating that the EHCI capabilities list exists and begins at offset 68h in the PCI
configuration space.
7:4
Isochronous Scheduling Threshold—RO. This field indicates, relative to the current
position of the executing host controller, where software can reliably update the
isochronous schedule. When bit 7 is 0, the value of the least significant 3 bits indicates
the number of micro-frames a host controller hold a set of isochronous data structures
(one or more) before flushing the state. When bit 7 is a 1, then host software assumes
the host controller may cache an isochronous data structure for an entire frame. See
the EHCI specification for details on how software uses this information for scheduling
isochronous transfers.
This field is hardwired to 8h.
3 Reserved
2Asynchronous Schedule Park Capability—RO. This bit is hardwired to 0 indicating
that the host controller does not support this optional feature
1
Programmable Frame List Flag—RO.
0 = System software must use a frame list length of 1024 elements with this host
controller. The USB2.0_CMD register (D29:F0, D26:F0:CAPLENGTH + 20h, bits
3:2) Frame List Size field is a read-only register and must be set to 0.
1 = System software can specify and use a smaller frame list and configure the host
controller using the USB2.0_CMD register Frame List Size field. The frame list must
always be aligned on a 4K page boundary. This requirement ensures that the frame
list is always physically contiguous.
0
64-bit Addressing Capability—RO. This field documents the addressing range
capability of this implementation. The value of this field determines whether software
should use the 32-bit or 64-bit data structures.
This bit is hardwired to 1.
NOTE: The PCH supports 64 bit addressing only.
EHCI Controller Registers (D29:F0, D26:F0)
688 Datasheet
16.2.2 Host Controller Operational Registers
This section defines the enhanced host controller operational registers. These registers
are located after the capabilities registers. The operational register base must be
DWord-aligned and is calculated by adding the value in the first capabilities register
(CAPLENGTH) to the base address of the enhanced host controller register address
space (MEM_BASE). Since CAPLENGTH is always 20h, Table 16-3 already accounts for
this offset. All registers are 32 bits in length.
Note: Software must read and write these registers using only DWord accesses.These
registers are divided into two sets. The first set at offsets MEM_BASE + 00:3Bh are
implemented in the core power well. Unless otherwise noted, the core well registers are
reset by the assertion of any of the following:
Core well hardware reset
HCRESET
•D3-to-D0 reset
Table 16-3. Enhanced Host Controller Operational Register Address Map
MEM_BASE
+ Offset Mnemonic Register Name Default Special
Notes Type
20h–23h USB2.0_CMD USB 2.0 Command 00080000h R/W, RO
24h–27h USB2.0_STS USB 2.0 Status 00001000h R/WC, RO
28h–2Bh USB2.0_INTR USB 2.0 Interrupt
Enable 00000000h R/W
2Ch–2Fh FRINDEX USB 2.0 Frame Index 00000000h R/W,
30h–33h CTRLDSSEGMENT Control Data Structure
Segment 00000000h R/W, RO
34h–37h PERODICLISTBASE Period Frame List Base
Address 00000000h R/W
38h–3Bh ASYNCLISTADDR Current Asynchronous
List Address 00000000h R/W
3Ch–5Fh Reserved 0h RO
60h–63h CONFIGFLAG Configure Flag 00000000h Suspend R/W
64h–67h PORT0SC Port 0 Status and
Control 00003000h Suspend R/W,
R/WC, RO
68h–6Bh PORT1SC Port 1 Status and
Control 00003000h Suspend R/W,
R/WC, RO
6Ch–6Fh PORT2SC Port 2 Status and
Control 00003000h Suspend R/W,
R/WC, RO
70h–73h PORT3SC Port 3 Status and
Control 00003000h Suspend R/W,
R/WC, RO
74h–77h PORT4SC Port 4 Status and
Control 00003000h Suspend R/W,
R/WC, RO
78h–7Bh PORT5SC Port 5 Status and
Control 00003000h Suspend R/W,
R/WC, RO
74h–77h
(D29 Only) PORT6SC Port 6 Status and
Control 00003000h Suspend R/W,
R/WC, RO
78h–7Bh
(D29 Only) PORT7SC Port 7 Status and
Control 00003000h Suspend R/W,
R/WC, RO
7Ch–9Fh Reserved Undefined RO
A0h–B3h Debug Port Registers Undefined See register
description
B4h–3FFh Reserved Undefined RO
Datasheet 689
EHCI Controller Registers (D29:F0, D26:F0)
The second set at offsets MEM_BASE + 60h to the end of the implemented register
space are implemented in the Suspend power well. Unless otherwise noted, the
suspend well registers are reset by the assertion of either of the following:
Suspend well hardware reset
HCRESET
16.2.2.1 USB2.0_CMD—USB 2.0 Command Register
Offset: MEM_BASE + 20–23h Attribute: R/W, RO
Default Value: 00080000h Size: 32 bits
Bit Description
31:24 Reserved
23:16
Interrupt Threshold Control—R/W. System software uses this field to select the
maximum rate at which the host controller will issue interrupts. The only valid values
are defined below. If software writes an invalid value to this register, the results are
undefined.
15:14 Reserved
13 Asynch Schedule Update (ASC)—R/W. There is no functionality associated with this
bit.
12
Periodic Schedule Prefetch Enable—R/W. This bit is used by software to enable the
host controller to prefetch the periodic schedule even in C0.
0 = Prefetch based pause enabled only when not in C0.
1 = Prefetch based pause enable in C0.
Once software has written a 1b to this bit to enable periodic schedule prefetching, it
must disable prefecthing by writing a 0b to this bit whenever periodic schedule updates
are about to begin. Software should continue to dynamically disable and re-enable the
prefetcher surrounding any updates to the periodic scheduler (that is, until the host
controller has been reset using a HCRESET).
11:8 Unimplemented Asynchronous Park Mode Bits—RO. Hardwired to 000b indicating the
host controller does not support this optional feature.
7Light Host Controller Reset—RO. Hardwired to 0. The PCH does not implement this
optional reset.
Value Maximum Interrupt Interval
00h Reserved
01h 1 micro-frame
02h 2 micro-frames
04h 4 micro-frames
08h 8 micro-frames (default, equates to 1 ms)
10h 16 micro-frames (2 ms)
20h 32 micro-frames (4 ms)
40h 64 micro-frames (8 ms)
EHCI Controller Registers (D29:F0, D26:F0)
690 Datasheet
6
Interrupt on Async Advance Doorbell—R/W. This bit is used as a doorbell by
software to tell the host controller to issue an interrupt the next time it advances
asynchronous schedule.
0 = The host controller sets this bit to a 0 after it has set the Interrupt on Async
Advance status bit (D29:F0, D26:F0:CAPLENGTH + 24h, bit 5) in the USB2.0_STS
register to a 1.
1 = Software must write a 1 to this bit to ring the doorbell. When the host controller
has evicted all appropriate cached schedule state, it sets the Interrupt on Async
Advance status bit in the USB2.0_STS register. If the Interrupt on Async Advance
Enable bit in the USB2.0_INTR register (D29:F0, D26:F0:CAPLENGTH + 28h, bit 5)
is a 1 then the host controller will assert an interrupt at the next interrupt
threshold. See the EHCI specification for operational details.
NOTE: Software should not write a 1 to this bit when the asynchronous schedule is
inactive. Doing so will yield undefined results.
5
Asynchronous Schedule Enable—R/W. This bit controls whether the host controller
skips processing the Asynchronous Schedule.
0 = Do not process the Asynchronous Schedule
1 = Use the ASYNCLISTADDR register to access the Asynchronous Schedule.
4
Periodic Schedule Enable—R/W. This bit controls whether the host controller skips
processing the Periodic Schedule.
0 = Do not process the Periodic Schedule
1 = Use the PERIODICLISTBASE register to access the Periodic Schedule.
3:2 Frame List Size—RO. The PCH hardwires this field to 00b because it only supports the
1024-element frame list size.
1
Host Controller Reset (HCRESET)—R/W. This control bit used by software to reset
the host controller. The effects of this on root hub registers are similar to a Chip
Hardware Reset (that is, RSMRST# assertion and PWROK de-assertion on the PCH).
When software writes a 1 to this bit, the host controller resets its internal pipelines,
timers, counters, state machines, etc. to their initial value. Any transaction currently in
progress on USB is immediately terminated. A USB reset is not driven on downstream
ports.
NOTE: PCI configuration registers and Host controller capability registers are not
effected by this reset.
All operational registers, including port registers and port state machines are set to
their initial values. Port ownership reverts to the companion host controller(s), with the
side effects described in the EHCI spec. Software must re-initialize the host controller
to return the host controller to an operational state.
This bit is set to 0 by the host controller when the reset process is complete. Software
cannot terminate the reset process early by writing a 0 to this register.
Software should not set this bit to a 1 when the HCHalted bit (D29:F0,
D26:F0:CAPLENGTH + 24h, bit 12) in the USB2.0_STS register is a 0. Attempting to
reset an actively running host controller will result in undefined behavior. This reset me
be used to leave EHCI port test modes.
Bit Description
Datasheet 691
EHCI Controller Registers (D29:F0, D26:F0)
NOTE: The Command Register indicates the command to be executed by the serial bus host
controller. Writing to the register causes a command to be executed.
0
Run/Stop (RS)—R/W.
0 = Stop (default)
1 = Run. When set to a 1, the Host controller proceeds with execution of the schedule.
The Host controller continues execution as long as this bit is set. When this bit is
set to 0, the Host controller completes the current transaction on the USB and then
halts. The HCHalted bit in the USB2.0_STS register indicates when the Host
controller has finished the transaction and has entered the stopped state.
Software should not write a 1 to this field unless the host controller is in the Halted
state (that is, HCHalted in the USBSTS register is a 1). The Halted bit is cleared
immediately when the Run bit is set.
The following table explains how the different combinations of Run and Halted should
be interpreted:
Memory read cycles initiated by the EHC that receive any status other than Successful
will result in this bit being cleared.
Bit Description
Run/Stop Halted Interpretation
0b 0b In the process of halting
0b 1b Halted
1b 0b Running
1b 1b Invalid - the HCHalted bit clears immediately
EHCI Controller Registers (D29:F0, D26:F0)
692 Datasheet
16.2.2.2 USB2.0_STS—USB 2.0 Status Register
Offset: MEM_BASE + 24h–27h Attribute: R/WC, RO
Default Value: 00001000h Size: 32 bits
This register indicates pending interrupts and various states of the Host controller. The
status resulting from a transaction on the serial bus is not indicated in this register. See
the Interrupts description in section 4 of the EHCI specification for additional
information concerning USB 2.0 interrupt conditions.
Note: For the writable bits, software must write a 1 to clear bits that are set. Writing a 0 has
no effect.
Bit Description
31:16 Reserved
15
Asynchronous Schedule Status RO. This bit reports the current real status of the
Asynchronous Schedule.
0 = Disabled. (Default)
1 = Enabled.
NOTE: The Host controller is not required to immediately disable or enable the
Asynchronous Schedule when software transitions the Asynchronous Schedule
Enable bit (D29:F0, D26:F0:CAPLENGTH + 20h, bit 5) in the USB2.0_CMD
register. When this bit and the Asynchronous Schedule Enable bit are the same
value, the Asynchronous Schedule is either enabled (1) or disabled (0).
14
Periodic Schedule Status RO. This bit reports the current real status of the Periodic
Schedule.
0 = Disabled. (Default)
1 = Enabled.
NOTE: The Host controller is not required to immediately disable or enable the Periodic
Schedule when software transitions the Periodic Schedule Enable bit (D29:F0,
D26:F0:CAPLENGTH + 20h, bit 4) in the USB2.0_CMD register. When this bit and
the Periodic Schedule Enable bit are the same value, the Periodic Schedule is
either enabled (1) or disabled (0).
13
Reclamation RO. This read-only status bit is used to detect an empty asynchronous
schedule. The operational model and valid transitions for this bit are described in
Section 4 of the EHCI Specification.
12
HCHalted RO.
0 = This bit is a 0 when the Run/Stop bit is a 1.
1 = The Host controller sets this bit to 1 after it has stopped executing as a result of the
Run/Stop bit being set to 0, either by software or by the Host controller hardware
(such as, internal error). (Default)
11:6 Reserved
5
Interrupt on Async Advance—R/WC. System software can force the host controller to
issue an interrupt the next time the host controller advances the asynchronous schedule
by writing a 1 to the Interrupt on Async Advance Doorbell bit (D29:F0,
D26:F0:CAPLENGTH + 20h, bit 6) in the USB2.0_CMD register. This bit indicates the
assertion of that interrupt source.
Datasheet 693
EHCI Controller Registers (D29:F0, D26:F0)
4
Host System Error—R/WC.
0 = No serious error occurred during a host system access involving the Host controller
module
1 = The Host controller sets this bit to 1 when a serious error occurs during a host
system access involving the Host controller module. A hardware interrupt is
generated to the system. Memory read cycles initiated by the EHC that receive any
status other than Successful will result in this bit being set.
When this error occurs, the Host controller clears the Run/Stop bit in the
USB2.0_CMDregister (D29:F0, D26:F0:CAPLENGTH + 20h, bit 0) to prevent further
execution of the scheduled TDs. A hardware interrupt is generated to the system (if
enabled in the Interrupt Enable Register).
3
Frame List Rollover—R/WC.
0 = No Frame List Index rollover from its maximum value to 0.
1 = The Host controller sets this bit to a 1 when the Frame List Index rolls over from its
maximum value to 0. Since the PCH only supports the 1024-entry Frame List Size,
the Frame List Index rolls over every time FRNUM13 toggles.
2
Port Change Detect—R/WC. This bit is allowed to be maintained in the Auxiliary power
well. Alternatively, it is also acceptable that on a D3 to D0 transition of the EHCI HC
device, this bit is loaded with the OR of all of the PORTSC change bits (including: Force
port resume, overcurrent change, enable/disable change and connect status change).
Regardless of the implementation, when this bit is readable (that is, in the D0 state), it
must provide a valid view of the Port Status registers.
0 = No change bit transition from a 0 to 1 or No Force Port Resume bit transition from 0
to 1 as a result of a J-K transition detected on a suspended port.
1 = The Host controller sets this bit to 1 when any port for which the Port Owner bit is
set to 0 has a change bit transition from a 0 to 1 or a Force Port Resume bit
transition from 0 to 1 as a result of a J-K transition detected on a suspended port.
1
USB Error Interrupt (USBERRINT)—R/WC.
0 = No error condition.
1 = The Host controller sets this bit to 1 when completion of a USB transaction results in
an error condition (such as, error counter underflow). If the TD on which the error
interrupt occurred also had its IOC bit set, both this bit and Bit 0 are set. See the
EHCI specification for a list of the USB errors that will result in this interrupt being
asserted.
0
USB Interrupt (USBINT)—R/WC.
0 = No completion of a USB transaction whose Transfer Descriptor had its IOC bit set.
No short packet is detected.
1 = The Host controller sets this bit to 1 when the cause of an interrupt is a completion
of a USB transaction whose Transfer Descriptor had its IOC bit set.
The Host controller also sets this bit to 1 when a short packet is detected (actual
number of bytes received was less than the expected number of bytes).
Bit Description
EHCI Controller Registers (D29:F0, D26:F0)
694 Datasheet
16.2.2.3 USB2.0_INTR—USB 2.0 Interrupt Enable Register
Offset: MEM_BASE + 28h–2Bh Attribute: R/W
Default Value: 00000000h Size: 32 bits
This register enables and disables reporting of the corresponding interrupt to the
software. When a bit is set and the corresponding interrupt is active, an interrupt is
generated to the host. Interrupt sources that are disabled in this register still appear in
the USB2.0_STS Register to allow the software to poll for events. Each interrupt enable
bit description indicates whether it is dependent on the interrupt threshold mechanism
(see Section 4 of the EHCI specification), or not.
Bit Description
31:6 Reserved
5
Interrupt on Async Advance Enable—R/W.
0 = Disable.
1 = Enable. When this bit is a 1, and the Interrupt on Async Advance bit (D29:F0,
D26:F0:CAPLENGTH + 24h, bit 5) in the USB2.0_STS register is a 1, the host
controller will issue an interrupt at the next interrupt threshold. The interrupt is
acknowledged by software clearing the Interrupt on Async Advance bit.
4
Host System Error Enable—R/W.
0 = Disable.
1 = Enable. When this bit is a 1, and the Host System Error Status bit (D29:F0,
D26:F0:CAPLENGTH + 24h, bit 4) in the USB2.0_STS register is a 1, the host
controller will issue an interrupt. The interrupt is acknowledged by software
clearing the Host System Error bit.
3
Frame List Rollover Enable—R/W.
0 = Disable.
1 = Enable. When this bit is a 1, and the Frame List Rollover bit (D29:F0,
D26:F0:CAPLENGTH + 24h, bit 3) in the USB2.0_STS register is a 1, the host
controller will issue an interrupt. The interrupt is acknowledged by software
clearing the Frame List Rollover bit.
2
Port Change Interrupt Enable—R/W.
0 = Disable.
1 = Enable. When this bit is a 1, and the Port Change Detect bit (D29:F0,
D26:F0:CAPLENGTH + 24h, bit 2) in the USB2.0_STS register is a 1, the host
controller will issue an interrupt. The interrupt is acknowledged by software
clearing the Port Change Detect bit.
1
USB Error Interrupt Enable—R/W.
0 = Disable.
1 = Enable. When this bit is a 1, and the USBERRINT bit (D29:F0, D26:F0:CAPLENGTH
+ 24h, bit 1) in the USB2.0_STS register is a 1, the host controller will issue an
interrupt at the next interrupt threshold. The interrupt is acknowledged by software
by clearing the USBERRINT bit in the USB2.0_STS register.
0
USB Interrupt Enable—R/W.
0 = Disable.
1 = Enable. When this bit is a 1, and the USBINT bit (D29:F0, D26:F0:CAPLENGTH +
24h, bit 0) in the USB2.0_STS register is a 1, the host controller will issue an
interrupt at the next interrupt threshold. The interrupt is acknowledged by software
by clearing the USBINT bit in the USB2.0_STS register.
Datasheet 695
EHCI Controller Registers (D29:F0, D26:F0)
16.2.2.4 FRINDEX—Frame Index Register
Offset: MEM_BASE + 2Ch–2Fh Attribute: R/W
Default Value: 00000000h Size: 32 bits
The SOF frame number value for the bus SOF token is derived or alternatively managed
from this register. See Section 4 of the EHCI specification for a detailed explanation of
the SOF value management requirements on the host controller. The value of FRINDEX
must be within 125 µs (1 micro-frame) ahead of the SOF token value. The SOF value
may be implemented as an 11-bit shadow register. For this discussion, this shadow
register is 11 bits and is named SOFV. SOFV updates every 8 micro-frames
(1 millisecond). An example implementation to achieve this behavior is to increment
SOFV each time the FRINDEX[2:0] increments from 0 to 1.
Software must use the value of FRINDEX to derive the current micro-frame number,
both for high-speed isochronous scheduling purposes and to provide the get micro-
frame number function required to client drivers. Therefore, the value of FRINDEX and
the value of SOFV must be kept consistent if chip is reset or software writes to
FRINDEX. Writes to FRINDEX must also write-through FRINDEX[13:3] to
SOFV[10:0]. To keep the update as simple as possible, software should never write a
FRINDEX value where the three least significant bits are 111b or 000b.
Note: This register is used by the host controller to index into the periodic frame list. The
register updates every 125 microseconds (once each micro-frame). Bits [12:3] are
used to select a particular entry in the Periodic Frame List during periodic schedule
execution. The number of bits used for the index is fixed at 10 for the PCH since it only
supports 1024-entry frame lists. This register must be written as a DWord. Word and
byte writes produce undefined results. This register cannot be written unless the Host
controller is in the Halted state as indicated by the HCHalted bit (D29:F0,
D26:F0:CAPLENGTH + 24h, bit 12). A write to this register while the Run/Stop bit
(D29:F0, D26:F0:CAPLENGTH + 20h, bit 0) is set to a 1 (USB2.0_CMD register)
produces undefined results. Writes to this register also effect the SOF value. See
Section 4 of the EHCI specification for details.
16.2.2.5 CTRLDSSEGMENT—Control Data Structure Segment
Register
Offset: MEM_BASE + 30h–33h Attribute: R/W, RO
Default Value: 00000000h Size: 32 bits
This 32-bit register corresponds to the most significant address bits [63:32] for all
EHCI data structures. Since the PCH hardwires the 64-bit Addressing Capability field in
HCCPARAMS to 1, this register is used with the link pointers to construct 64-bit
addresses to EHCI control data structures. This register is concatenated with the link
pointer from either the PERIODICLISTBASE, ASYNCLISTADDR, or any control data
structure link field to construct a 64-bit address. This register allows the host software
to locate all control data structures within the same 4 GB memory segment.
Bit Description
31:14 Reserved
13:0
Frame List Current Index/Frame Number—R/W. The value in this register increments
at the end of each time frame (such as, micro-frame).
Bits [12:3] are used for the Frame List current index. This means that each location of the
frame list is accessed 8 times (frames or micro-frames) before moving to the next index.
Bit Description
31:12 Upper Address[63:44]—RO. Hardwired to 0s. The PCH EHC is only capable of
generating addresses up to 16 terabytes (44 bits of address).
11:0 Upper Address[43:32]—R/W. This 12-bit field corresponds to address bits 43:32
when forming a control data structure address.
EHCI Controller Registers (D29:F0, D26:F0)
696 Datasheet
16.2.2.6 PERIODICLISTBASE—Periodic Frame List Base Address
Register
Offset: MEM_BASE + 34h–37h Attribute: R/W
Default Value: 00000000h Size: 32 bits
This 32-bit register contains the beginning address of the Periodic Frame List in the
system memory. Since the PCH host controller operates in 64-bit mode (as indicated by
the 1 in the 64-bit Addressing Capability field in the HCCSPARAMS register) (offset 08h,
bit 0), then the most significant 32 bits of every control data structure address comes
from the CTRLDSSEGMENT register. HCD loads this register prior to starting the
schedule execution by the host controller. The memory structure referenced by this
physical memory pointer is assumed to be 4-Kbyte aligned. The contents of this
register are combined with the Frame Index Register (FRINDEX) to enable the Host
controller to step through the Periodic Frame List in sequence.
16.2.2.7 ASYNCLISTADDR—Current Asynchronous List Address
Register
Offset: MEM_BASE + 38h–3Bh Attribute: R/W
Default Value: 00000000h Size: 32 bits
This 32-bit register contains the address of the next asynchronous queue head to be
executed. Since the PCH host controller operates in 64-bit mode (as indicated by a 1 in
64-bit Addressing Capability field in the HCCPARAMS register) (offset 08h, bit 0), then
the most significant 32 bits of every control data structure address comes from the
CTRLDSSEGMENT register (offset 08h). Bits [4:0] of this register cannot be modified by
system software and will always return 0s when read. The memory structure
referenced by this physical memory pointer is assumed to be 32-byte aligned.
Bit Description
31:12 Base Address (Low)—R/W. These bits correspond to memory address signals
[31:12], respectively.
11:0 Reserved
Bit Description
31:5 Link Pointer Low (LPL)—R/W. These bits correspond to memory address signals
[31:5], respectively. This field may only reference a Queue Head (QH).
4:0 Reserved
Datasheet 697
EHCI Controller Registers (D29:F0, D26:F0)
16.2.2.8 CONFIGFLAG—Configure Flag Register
Offset: MEM_BASE + 60h–63h Attribute: R/W
Default Value: 00000000h Size: 32 bits
This register is in the suspend power well. It is only reset by hardware when the
suspend power is initially applied or in response to a host controller reset.
16.2.2.9 PORTSC—Port N Status and Control Register
When RMH is disabled:
Offset: Port 0, Port 8: MEM_BASE + 64h67h
Port 1, Port 9: MEM_BASE + 686Bh
Port 2, Port 10: MEM_BASE + 6C6Fh
Port 3, Port 11: MEM_BASE + 7073h
Port 4: Port 12: MEM_BASE + 7477h
Port 5: Port 13: MEM_BASE + 787Bh
Port 6: MEM_BASE + 7Ch–7Bh
Port 7: MEM_BASE + 80h–83h
When RMH is enabled:
Offset: Port 0 RMH: MEM_BASE + 64h67h
Port 1 Debug Port: MEM_BASE + 686Bh
Port 2 USB redirect (if enabled): MEM_BASE + 6C6Fh
Attribute: R/W, R/WC, RO
Default Value: 00003000h Size: 32 bits
Note: When RMH is enabled this register is associated with the upstream ports of the EHCI
controller and does not represent downstream hub ports. USB Hub class commands
must be used to determine RMH port status and enable test modes. See Chapter 11 of
the USB Specification, Revision 2.0 for more details. Rate Matching Hub wake
capabilities can be configured by the RMHWKCTL Register (RCBA+35B0h) located in
the Chipset Configuration chapter.
A host controller must implement one or more port registers. Software uses the N_Port
information from the Structural Parameters Register to determine how many ports
need to be serviced. All ports have the structure defined below. Software must not
write to unreported Port Status and Control Registers.
This register is in the suspend power well. It is only reset by hardware when the
suspend power is initially applied or in response to a host controller reset. The initial
conditions of a port are:
No device connected
•Port disabled.
Bit Description
31:1 Reserved
0
Configure Flag (CF)—R/W. Host software sets this bit as the last action in its process
of configuring the Host controller. This bit controls the default port-routing control logic.
Bit values and side-effects are listed below. See section 4 of the EHCI spec for
operation details.
0 = Compatibility debug only (default).
1 = Port routing control logic default-routes all ports to this host controller.
EHCI Controller Registers (D29:F0, D26:F0)
698 Datasheet
When a device is attached, the port state transitions to the attached state and system
software will process this as with any status change notification. See Section 4 of the
EHCI specification for operational requirements for how change events interact with
port suspend mode.
Bit Description
31:23 Reserved
22
Wake on Overcurrent Enable (WKOC_E)—R/W.
0 = Disable. (Default)
1 = Enable. Writing this bit to a 1 enables the setting of the PME Status bit in the Power
Management Control/Status Register (offset 54, bit 15) when the overcurrent
Active bit (bit 4 of this register) is set.
21
Wake on Disconnect Enable (WKDSCNNT_E)—R/W.
0 = Disable. (Default)
1 = Enable. Writing this bit to a 1 enables the setting of the PME Status bit in the Power
Management Control/Status Register (offset 54, bit 15) when the Current Connect
Status changes from connected to disconnected (that is, bit 0 of this register
changes from 1 to 0).
20
Wake on Connect Enable (WKCNNT_E)—R/W.
0 = Disable. (Default)
1 = Enable. Writing this bit to a 1 enables the setting of the PME Status bit in the Power
Management Control/Status Register (offset 54, bit 15) when the Current Connect
Status changes from disconnected to connected (that is, bit 0 of this register
changes from 0 to 1).
19:16
Port Test Control—R/W. When this field is 0s, the port is NOT operating in a test
mode. A non-zero value indicates that it is operating in test mode and the specific test
mode is indicated by the specific value. The encoding of the test mode bits are (0110b
– 1111b are reserved):
See the USB Specification Revision 2.0, Chapter 7 for details on each test mode.
15:14 Reserved
13
Port OwnerR/W. This bit unconditionally goes to a 0 when the Configured Flag bit in
the USB2.0_CMD register makes a 0 to 1 transition.
System software uses this field to release ownership of the port to a selected host
controller (in the event that the attached device is not a high-speed device). Software
writes a 1 to this bit when the attached device is not a high-speed device. A 1 in this bit
means that a companion host controller owns and controls the port. See Section 4 of
the EHCI Specification for operational details.
12 Port Power (PP)—RO. Read-only with a value of 1. This indicates that the port does
have power.
Value Maximum Interrupt Interval
0000b Test mode not enabled (default)
0001b Test J_STATE
0010b Test K_STATE
0011b Test SE0_NAK
0100b Test Packet
0101b FORCE_ENABLE
Datasheet 699
EHCI Controller Registers (D29:F0, D26:F0)
11:10
Line Status—RO.These bits reflect the current logical levels of the D+ (bit 11) and D–
(bit 10) signal lines. These bits are used for detection of low-speed USB devices prior to
the port reset and enable sequence. This field is valid only when the port enable bit is 0
and the current connect status bit is set to a 1.
00 = SE0
10 = J-state
01 = K-state
11 = Undefined
9 Reserved
8
Port Reset—R/W. When software writes a 1 to this bit (from a 0), the bus reset
sequence as defined in the USB Specification, Revision 2.0 is started. Software writes a
0 to this bit to terminate the bus reset sequence. Software must keep this bit at a 1
long enough to ensure the reset sequence completes as specified in the USB
Specification, Revision 2.0.
1 = Port is in Reset.
0 = Port is not in Reset.
NOTE: When software writes a 0 to this bit, there may be a delay before the bit status
changes to a 0. The bit status will not read as a 0 until after the reset has
completed. If the port is in high-speed mode after reset is complete, the host
controller will automatically enable this port (such as, set the Port Enable bit to
a 1). A host controller must terminate the reset and stabilize the state of the
port within 2 milliseconds of software transitioning this bit from 0 to 1.
For example: if the port detects that the attached device is high-speed during
reset, then the host controller must have the port in the enabled state within
2 ms of software writing this bit to a 0. The HCHalted bit (D29:F0,
D26:F0:CAPLENGTH + 24h, bit 12) in the USB2.0_STS register should be a 0
before software attempts to use this bit. The host controller may hold Port Reset
asserted to a 1 when the HCHalted bit is a 1. This bit is 0 if Port Power is 0
NOTE: System software should not attempt to reset a port if the HCHalted bit in the
USB2.0_STS register is a 1. Doing so will result in undefined behavior.
7
Suspend—R/W.
0 = Port not in suspend state.(Default)
1 = Port in suspend state.
Port Enabled Bit and Suspend bit of this register define the port states as follows:
When in suspend state, downstream propagation of data is blocked on this port, except
for port reset. Note that the bit status does not change until the port is suspended and
that there may be a delay in suspending a port depending on the activity on the port.
The host controller will unconditionally set this bit to a 0 when software sets the Force
Port Resume bit to a 0 (from a 1). A write of 0 to this bit is ignored by the host
controller.
If host software sets this bit to a 1 when the port is not enabled (that is, Port enabled
bit is a 0) the results are undefined.
Bit Description
Port Enabled Suspend Port State
0XDisabled
10Enabled
11Suspend
EHCI Controller Registers (D29:F0, D26:F0)
700 Datasheet
6
Force Port Resume—R/W.
0 = No resume (K-state) detected/driven on port. (Default)
1 = Resume detected/driven on port. Software sets this bit to a 1 to drive resume
signaling. The Host controller sets this bit to a 1 if a J-to-K transition is detected
while the port is in the Suspend state. When this bit transitions to a 1 because a J-
to-K transition is detected, the Port Change Detect bit (D29:F0,
D26:F0:CAPLENGTH + 24h, bit 2) in the USB2.0_STS register is also set to a 1. If
software sets this bit to a 1, the host controller must not set the Port Change
Detect bit.
NOTE: When the EHCI controller owns the port, the resume sequence follows the
defined sequence documented in the USB Specification, Revision 2.0. The
resume signaling (Full-speed 'K') is driven on the port as long as this bit
remains a 1. Software must appropriately time the Resume and set this bit to a
0 when the appropriate amount of time has elapsed. Writing a 0 (from 1)
causes the port to return to high-speed mode (forcing the bus below the port
into a high-speed idle). This bit will remain a 1 until the port has switched to the
high-speed idle.
5
Overcurrent Change—R/WC. The functionality of this bit is not dependent upon the
port owner. Software clears this bit by writing a 1 to it.
0 = No change. (Default)
1 = There is a change to Overcurrent Active.
4
Overcurrent Active—RO.
0 = This port does not have an overcurrent condition. (Default)
1 = This port currently has an overcurrent condition. This bit will automatically
transition from 1 to 0 when the over current condition is removed. The PCH
automatically disables the port when the overcurrent active bit is 1.
3
Port Enable/Disable Change—R/WC. For the root hub, this bit gets set to a 1 only
when a port is disabled due to the appropriate conditions existing at the EOF2 point
(See Chapter 11 of the USB Specification for the definition of a port error). This bit is
not set due to the Disabled-to-Enabled transition, nor due to a disconnect. Software
clears this bit by writing a 1 to it.
0 = No change in status. (Default).
1 = Port enabled/disabled status has changed.
2
Port Enabled/Disabled—R/W. Ports can only be enabled by the host controller as a
part of the reset and enable. Software cannot enable a port by writing a 1 to this bit.
Ports can be disabled by either a fault condition (disconnect event or other fault
condition) or by host software. Note that the bit status does not change until the port
state actually changes. There may be a delay in disabling or enabling a port due to
other host controller and bus events.
0 = Disable
1 = Enable (Default)
1
Connect Status Change—R/WC. This bit indicates a change has occurred in the port’s
Current Connect Status. Software sets this bit to 0 by writing a 1 to it.
0 = No change (Default).
1 = Change in Current Connect Status. The host controller sets this bit for all changes
to the port device connect status, even if system software has not cleared an
existing connect status change. For example, the insertion status changes twice
before system software has cleared the changed condition, hub hardware will be
“setting” an already-set bit (that is, the bit will remain set).
0
Current Connect Status—RO. This value reflects the current state of the port, and
may not correspond directly to the event that caused the Connect Status Change bit
(Bit 1) to be set.
0 = No device is present. (Default)
1 = Device is present on port.
Bit Description
Datasheet 701
EHCI Controller Registers (D29:F0, D26:F0)
16.2.3 USB 2.0-Based Debug Port Registers
The Debug port’s registers are located in the same memory area, defined by the Base
Address Register (MEM_BASE), as the standard EHCI registers. The base offset for the
debug port registers (A0h) is declared in the Debug Port Base Offset Capability Register
at Configuration offset 5Ah (D29:F0, D26:F0:offset 5Ah). The specific EHCI port that
supports this debug capability (Port 1 for D29:F0 and Port 9 for D26:F0) is indicated by
a 4-bit field (bits 20–23) in the HCSPARAMS register of the EHCI controller. The address
map of the Debug Port registers is shown in Table 16-4.
NOTES:
1. All of these registers are implemented in the core well and reset by PLTRST#, EHC
HCRESET, and a EHC D3-to-D0 transition.
2. The hardware associated with this register provides no checks to ensure that software
programs the interface correctly. How the hardware behaves when programmed
improperly is undefined.
Table 16-4. Debug Port Register Address Map
MEM_BASE +
Offset Mnemonic Register Name Default Type
A0–A3h CNTL_STS Control/Status 00000000h R/W, R/WC,
RO
A4–A7h USBPID USB PIDs 00000000h R/W, RO
A8–AFh DATABUF[7:0] Data Buffer (Bytes 7:0) 00000000
00000000h R/W
B0–B3h CONFIG Configuration 00007F01h R/W
EHCI Controller Registers (D29:F0, D26:F0)
702 Datasheet
16.2.3.1 CNTL_STS—Control/Status Register
Offset: MEM_BASE + A0h Attribute: R/W, R/WC, RO
Default Value: 00000000h Size: 32 bits
Bit Description
31 Reserved
30
OWNER_CNT—R/W.
0 = Ownership of the debug port is NOT forced to the EHCI controller (Default)
1 = Ownership of the debug port is forced to the EHCI controller (that is,
immediately taken away from the companion Classic USB Host controller) If the
port was already owned by the EHCI controller, then setting this bit has no
effect. This bit overrides all of the ownership-related bits in the standard EHCI
registers.
29 Reserved
28
ENABLED_CNT—R/W.
0 = Software can clear this by writing a 0 to it. The hardware clears this bit for the
same conditions where the Port Enable/Disable Change bit (in the PORTSC
register) is set. (Default)
1 = Debug port is enabled for operation. Software can directly set this bit if the port
is already enabled in the associated PORTSC register (this is enforced by the
hardware).
27:17 Reserved
16
DONE_STS—R/WC. Software can clear this by writing a 1 to it.
0 = Request Not complete
1 = Set by hardware to indicate that the request is complete.
15:12 LINK_ID_STS—RO. This field identifies the link interface.
0h = Hardwired. Indicates that it is a USB Debug Port.
11 Reserved
10
IN_USE_CNT—R/W. Set by software to indicate that the port is in use. Cleared by
software to indicate that the port is free and may be used by other software. This bit
is cleared after reset. (This bit has no affect on hardware.)
9:7
EXCEPTION_STS—RO. This field indicates the exception when the
ERROR_GOOD#_STS bit is set. This field should be ignored if the
ERROR_GOOD#_STS bit is 0.
000 =No Error. (Default)
NOTE: This should not be seen since this field should only be checked if there
is an error.
001 =Transaction error: Indicates the USB 2.0 transaction had an error (CRC, bad
PID, timeout, etc.)
010 =Hardware error. Request was attempted (or in progress) when port was
suspended or reset.
All Other combinations are reserved
Datasheet 703
EHCI Controller Registers (D29:F0, D26:F0)
NOTES:
1. Software should do Read-Modify-Write operations to this register to preserve the contents
of bits not being modified. This include Reserved bits.
2. To preserve the usage of RESERVED bits in the future, software should always write the
same value read from the bit until it is defined. Reserved bits will always return 0 when
read.
6
ERROR_GOOD#_STS—RO.
0 = Hardware clears this bit to 0 after the proper completion of a read or write.
(Default)
1 = Error has occurred. Details on the nature of the error are provided in the
Exception field.
5
GO_CNT—R/W.
0 = Hardware clears this bit when hardware sets the DONE_STS bit. (Default)
1 = Causes hardware to perform a read or write request.
NOTE: Writing a 1 to this bit when it is already set may result in undefined behavior.
4
WRITE_READ#_CNT—R/W. Software clears this bit to indicate that the current
request is a read. Software sets this bit to indicate that the current request is a write.
0 = Read (Default)
1 = Write
3:0
DATA_LEN_CNT—R/W. This field is used to indicate the size of the data to be
transferred.
default = 0h.
For write operations, this field is set by software to indicate to the hardware how
many bytes of data in Data Buffer are to be transferred to the console. A value of 0h
indicates that a zero-length packet should be sent. A value of 1–8 indicates 1–8
bytes are to be transferred. Values 9–Fh are invalid and how hardware behaves if
used is undefined.
For read operations, this field is set by hardware to indicate to software how many
bytes in Data Buffer are valid in response to a read operation. A value of 0h indicates
that a zero length packet was returned and the state of Data Buffer is not defined. A
value of 1–8 indicates 1–8 bytes were received. Hardware is not allowed to return
values 9–Fh.
The transferring of data always starts with byte 0 in the data area and moves toward
byte 7 until the transfer size is reached.
Bit Description
EHCI Controller Registers (D29:F0, D26:F0)
704 Datasheet
16.2.3.2 USBPID—USB PIDs Register
Offset: MEM_BASE + A4h–A7h Attribute: R/W, RO
Default Value: 00000000h Size: 32 bits
This Dword register is used to communicate PID information between the USB debug
driver and the USB debug port. The debug port uses some of these fields to generate
USB packets, and uses other fields to return PID information to the USB debug driver.
16.2.3.3 DATABUF[7:0]—Data Buffer Bytes[7:0] Register
Offset: MEM_BASE + A8h–AFh Attribute: R/W
Default Value: 0000000000000000h Size: 64 bits
This register can be accessed as 8 separate 8-bit registers or 2 separate 32-bit register.
16.2.3.4 CONFIG—Configuration Register
Offset: MEM_BASE + B0–B3h Attribute: R/W
Default Value: 00007F01h Size: 32 bits
§ §
Bit Description
31:24 Reserved
23:16
RECEIVED_PID_STS[23:16]—RO. Hardware updates this field with the received PID
for transactions in either direction. When the controller is writing data, this field is
updated with the handshake PID that is received from the device. When the host
controller is reading data, this field is updated with the data packet PID (if the device
sent data), or the handshake PID (if the device NAKs the request). This field is valid
when the hardware clears the GO_DONE#_CNT bit.
15:8
SEND_PID_CNT[15:8]—R/W. Hardware sends this PID to begin the data packet
when sending data to USB (that is, WRITE_READ#_CNT is asserted). Software
typically sets this field to either DATA0 or DATA1 PID values.
7:0
TOKEN_PID_CNT[7:0]—R/W. Hardware sends this PID as the Token PID for each
USB transaction. Software typically sets this field to either IN, OUT, or SETUP PID
values.
Bit Description
63:0
DATABUFFER[63:0]—R/W. This field is the 8 bytes of the data buffer. Bits 7:0
correspond to least significant byte (byte 0). Bits 63:56 correspond to the most
significant byte (byte 7).
The bytes in the Data Buffer must be written with data before software initiates a write
request. For a read request, the Data Buffer contains valid data when DONE_STS bit
(offset A0, bit 16) is cleared by the hardware, ERROR_GOOD#_STS (offset A0, bit 6) is
cleared by the hardware, and the DATA_LENGTH_CNT field (offset A0, bits 3:0)
indicates the number of bytes that are valid.
Bit Description
31:15 Reserved
14:8 USB_ADDRESS_CNF—R/W. This 7-bit field identifies the USB device address used
by the controller for all Token PID generation. (Default = 7Fh)
7:4 Reserved
3:0 USB_ENDPOINT_CNF—R/W. This 4-bit field identifies the endpoint used by the
controller for all Token PID generation. (Default = 1h)
Datasheet 705
Intel® High Definition Audio Controller Registers (D27:F0)
17 Intel® High Definition Audio
Controller Registers (D27:F0)
The Intel® High Definition Audio controller resides in PCI Device 27, Function 0 on bus
0. This function contains a set of DMA engines that are used to move samples of
digitally encoded data between system memory and external codecs.
Note: All registers in this function (including memory-mapped registers) must be addressable
in byte, word, and DWord quantities. The software must always make register accesses
on natural boundaries (that is, DWord accesses must be on DWord boundaries; word
accesses on word boundaries, etc.). Register access crossing the DWord boundary are
ignored. In addition, the memory-mapped register space must not be accessed with
the LOCK semantic exclusive-access mechanism. If software attempts exclusive-access
mechanisms to the Intel® High Definition Audio memory-mapped space, the results are
undefined.
Note: Users interested in providing feedback on the Intel® High Definition Audio specification
or planning to implement the Intel® High Definition Audio specification into a future
product will need to execute the Intel® High Definition Audio Specification Developer’s
Agreement. For more information, contact nextgenaudio@intel.com.
17.1 Intel® High Definition Audio PCI Configuration
Space (Intel® High Definition Audio—D27:F0)
Note: Address locations that are not shown should be treated as Reserved.
Table 17-1. Intel® High Definition Audio PCI Register Address Map
(Intel® High Definition Audio D27:F0) (Sheet 1 of 2)
Offset Mnemonic Register Name Default Access
00h–01h VID Vendor Identification 8086h RO
02h–03h DID Device Identification See register
description RO
04h–05h PCICMD PCI Command 0000h R/W, RO
06h–07h PCISTS PCI Status 0010h R/WC, RO
08h RID Revision Identification See register
description RO
09h PI Programming Interface 00h RO
0Ah SCC Sub Class Code 03h RO
0Bh BCC Base Class Code 04h RO
0Ch CLS Cache Line Size 00h R/W
0Dh LT Latency Timer 00h RO
0Eh HEADTYP Header Type 00h RO
10h–13h HDBARL Intel® High Definition Audio Lower Base
Address (Memory) 00000004h R/W, RO
14h–17h HDBARU Intel High Definition Audio Upper Base
Address (Memory) 00000000h R/W
2Ch–2Dh SVID Subsystem Vendor Identification 0000h R/WO
2Eh–2Fh SID Subsystem Identification 0000h R/WO
Intel® High Definition Audio Controller Registers (D27:F0)
706 Datasheet
34h CAPPTR Capability List Pointer 50h RO
3Ch INTLN Interrupt Line 00h R/W
3Dh INTPN Interrupt Pin See Register
Description RO
40h HDCTL Intel® High Definition Audio Control 01h R/W, RO
43h HDINIT1 Intel High Definition Audio Initialization
Register 1 07h RO
44h TCSEL Traffic Class Select 00h R/W
4Ch DCKCTL Docking Control (Mobile Only) 00h R/W, RO
4Dh DCKSTS Docking Status (Mobile Only) 80h R/WO, RO
50h–51h PID PCI Power Management Capability ID 6001h R/WO, RO
52h–53h PC Power Management Capabilities C842h RO
54h–57h PCS Power Management Control and Status 00000000h R/W, RO,
R/WC
60h–61h MID MSI Capability ID 7005h RO
62h–63h MMC MSI Message Control 0080h R/W, RO
64h–67h MMLA MSI Message Lower Address 00000000h R/W, RO
68h–6Bh MMUA MSI Message Upper Address 00000000h R/W
6Ch–6Dh MMD MSI Message Data 0000h R/W
70h–71h PXID PCI Express* Capability Identifiers 0010h RO
72h–73h PXC PCI Express Capabilities 0091h RO
74h–77h DEVCAP Device Capabilities 10000000h RO, R/WO
78h–79h DEVC Device Control 0800h R/W, RO
7Ah–7Bh DEVS Device Status 0010h RO
100h–103h VCCAP Virtual Channel Enhanced Capability
Header 13010002h R/WO
104h–107h PVCCAP1 Port VC Capability Register 1 00000001h RO
108h–10Bh PVCCAP2 Port VC Capability Register 2 00000000h RO
10Ch–10D PVCCTL Port VC Control 0000h RO
10Eh–10Fh PVCSTS Port VC Status 0000h RO
110h–113h VC0CAP VC0 Resource Capability 00000000h RO
114h–117h VC0CTL VC0 Resource Control 800000FFh R/W, RO
11Ah–11Bh VC0STS VC0 Resource Status 0000h RO
11Ch–11Fh VCiCAP VCi Resource Capability 00000000h RO
120h–123h VCiCTL VCi Resource Control 00000000h R/W, RO
126h–127h VCiSTS VCi Resource Status 0000h RO
130h–133h RCCAP Root Complex Link Declaration Enhanced
Capability Header 00010005h RO
134h–137h ESD Element Self Description 0F000100h RO
140h–143h L1DESC Link 1 Description 00000001h RO
148h–14Bh L1ADDL Link 1 Lower Address See Register
Description RO
14Ch–14Fh L1ADDU Link 1 Upper Address 00000000h RO
Table 17-1. Intel® High Definition Audio PCI Register Address Map
(Intel® High Definition Audio D27:F0) (Sheet 2 of 2)
Offset Mnemonic Register Name Default Access
Datasheet 707
Intel® High Definition Audio Controller Registers (D27:F0)
17.1.1 VID—Vendor Identification Register
(Intel® High Definition Audio Controller—D27:F0)
Offset: 00h–01h Attribute: RO
Default Value: 8086h Size: 16 bits
17.1.2 DID—Device Identification Register
(Intel® High Definition Audio Controller—D27:F0)
Offset Address: 02h03h Attribute: RO
Default Value: See bit description Size: 16 bits
Bit Description
15:0 Vendor ID—RO. This is a 16-bit value assigned to Intel. Intel VID = 8086h
Bit Description
15:0
Device ID—RO. This is a 16-bit value assigned to the PCH’s Intel® High Definition
Audio controller. See the Intel® 5 Series Chipset and Intel® 3400 Series Chipset
Specification Update for the value of the Device ID Register.
Intel® High Definition Audio Controller Registers (D27:F0)
708 Datasheet
17.1.3 PCICMD—PCI Command Register
(Intel® High Definition Audio Controller—D27:F0)
Offset Address: 04h–05h Attribute: R/W, RO
Default Value: 0000h Size: 16 bits
Bit Description
15:11 Reserved
10
Interrupt Disable (ID)—R/W.
0= The INTx# signals may be asserted.
1= The Intel® High Definition Audio controller’s INTx# signal will be de-asserted.
NOTE: This bit does not affect the generation of MSIs.
9 Fast Back to Back Enable (FBE)—RO. Not implemented. Hardwired to 0.
8SERR# Enable (SERR_EN)—R/W. SERR# is not generated by the PCH Intel® High
Definition Audio Controller.
7 Wait Cycle Control (WCC)—RO. Not implemented. Hardwired to 0.
6 Parity Error Response (PER)—R/W. PER functionality not implemented.
5 VGA Palette Snoop (VPS). Not implemented. Hardwired to 0.
4 Memory Write and Invalidate Enable (MWIE)—RO. Not implemented. Hardwired to 0.
3 Special Cycle Enable (SCE). Not implemented. Hardwired to 0.
2
Bus Master Enable (BME)—R/W. Controls standard PCI Express* bus mastering
capabilities for Memory and I/O, reads and writes. Note that this bit also controls MSI
generation since MSI’s are essentially Memory writes.
0 = Disable
1 = Enable
1
Memory Space Enable (MSE)—R/W. Enables memory space addresses to the Intel®
High Definition Audio controller.
0 = Disable
1 = Enable
0I/O Space Enable (IOSE)—RO. Hardwired to 0 since the Intel® High Definition Audio
controller does not implement I/O space.
Datasheet 709
Intel® High Definition Audio Controller Registers (D27:F0)
17.1.4 PCISTS—PCI Status Register
(Intel® High Definition Audio Controller—D27:F0)
Offset Address: 06h–07h Attribute: RO, R/WC
Default Value: 0010h Size: 16 bits
Bit Description
15 Detected Parity Error (DPE)—RO. Not implemented. Hardwired to 0.
14 SERR# Status (SERRS)—RO. Not implemented. Hardwired to 0.
13
Received Master Abort (RMA)—R/WC. Software clears this bit by writing a 1 to it.
0 = No master abort received.
1 = The Intel® High Definition Audio controller sets this bit when, as a bus master, it
receives a master abort. When set, the Intel® High Definition Audio controller
clears the run bit for the channel that received the abort.
12 Received Target Abort (RTA)—RO. Not implemented. Hardwired to 0.
11 Signaled Target Abort (STA)—RO. Not implemented. Hardwired to 0.
10:9 DEVSEL# Timing Status (DEV_STS)—RO. Does not apply. Hardwired to 0.
8 Data Parity Error Detected (DPED)—RO. Not implemented. Hardwired to 0.
7 Fast Back to Back Capable (FB2BC)—RO. Does not apply. Hardwired to 0.
6 Reserved
5 66 MHz Capable (66MHZ_CAP)—RO. Does not apply. Hardwired to 0.
4
Capabilities List (CAP_LIST)—RO. Hardwired to 1. Indicates that the controller
contains a capabilities pointer list. The first item is pointed to by looking at
configuration offset 34h.
3
Interrupt Status (IS)—RO.
0 = This bit is 0 after the interrupt is cleared.
1 = This bit is 1 when the INTx# is asserted.
Note that this bit is not set by an MSI.
2:0 Reserved
Intel® High Definition Audio Controller Registers (D27:F0)
710 Datasheet
17.1.5 RID—Revision Identification Register
(Intel® High Definition Audio Controller—D27:F0)
Offset: 08h Attribute: RO
Default Value: See bit description Size: 8 Bits
17.1.6 PI—Programming Interface Register
(Intel® High Definition Audio Controller—D27:F0)
Offset: 09h Attribute: RO
Default Value: 00h Size: 8 bits
17.1.7 SCC—Sub Class Code Register
(Intel® High Definition Audio Controller—D27:F0)
Address Offset: 0Ah Attribute: RO
Default Value: 03h Size: 8 bits
17.1.8 BCC—Base Class Code Register
(Intel® High Definition Audio Controller—D27:F0)
Address Offset: 0Bh Attribute: RO
Default Value: 04h Size: 8 bits
17.1.9 CLS—Cache Line Size Register
(Intel® High Definition Audio Controller—D27:F0)
Address Offset: 0Ch Attribute: R/W
Default Value: 00h Size: 8 bits
Bit Description
7:0 Revision ID—RO. See the Intel® 5 Series Chipset and Intel® 3400 Series Chipset
Specification Update for the value of the Revision ID Register
Bit Description
7:0 Programming Interface—RO.
Bit Description
7:0 Sub Class Code (SCC)—RO.
03h = Audio Device
Bit Description
7:0 Base Class Code (BCC)—RO.
04h = Multimedia device
Bit Description
7:0 Cache Line Size—R/W. Implemented as R/W register, but has no functional impact to
the PCH
Datasheet 711
Intel® High Definition Audio Controller Registers (D27:F0)
17.1.10 LT—Latency Timer Register
(Intel® High Definition Audio Controller—D27:F0)
Address Offset: 0Dh Attribute: RO
Default Value: 00h Size: 8 bits
17.1.11 HEADTYP—Header Type Register
(Intel® High Definition Audio Controller—D27:F0)
Address Offset: 0Eh Attribute: RO
Default Value: 00h Size: 8 bits
17.1.12 HDBARL—Intel® High Definition Audio Lower Base Address
Register (Intel® High Definition Audio—D27:F0)
Address Offset: 10h–13h Attribute: R/W, RO
Default Value: 00000004h Size: 32 bits
17.1.13 HDBARU—Intel® High Definition Audio Upper Base
Address Register
(Intel® High Definition Audio Controller—D27:F0)
Address Offset: 14h–17h Attribute: R/W
Default Value: 00000000h Size: 32 bits
Bit Description
7:0 Latency Timer—RO. Hardwired to 00
Bit Description
7:0 Header Type—RO. Hardwired to 00.
Bit Description
31:14
Lower Base Address (LBA)—R/W. Base address for the Intel® High Definition Audio
controller’s memory mapped configuration registers. 16 Kbytes are requested by
hardwiring bits 13:4 to 0s.
13:4 Reserved
3 Prefetchable (PREF)—RO. Hardwired to 0 to indicate that this BAR is NOT prefetchable
2:1 Address Range (ADDRNG)—RO. Hardwired to 10b, indicating that this BAR can be
located anywhere in 64-bit address space.
0Space Type (SPTYP)—RO. Hardwired to 0. Indicates this BAR is located in memory
space.
Bit Description
31:0 Upper Base Address (UBA)—R/W. Upper 32 bits of the Base address for the Intel®
High Definition Audio controller’s memory mapped configuration registers.
Intel® High Definition Audio Controller Registers (D27:F0)
712 Datasheet
17.1.14 SVID—Subsystem Vendor Identification Register
(Intel® High Definition Audio Controller—D27:F0)
Address Offset: 2Ch–2Dh Attribute: R/WO
Default Value: 0000h Size: 16 bits
Function Level Reset: No
The SVID register, in combination with the Subsystem ID register (D27:F0:2Eh),
enable the operating environment to distinguish one audio subsystem from the
other(s).
This register is implemented as write-once register. Once a value is written to it, the
value can be read back. Any subsequent writes will have no effect.
This register is not affected by the D3HOT to D0 transition.
17.1.15 SID—Subsystem Identification Register
(Intel® High Definition Audio Controller—D27:F0)
Address Offset: 2Eh–2Fh Attribute: R/WO
Default Value: 0000h Size: 16 bits
Function Level Reset: No
The SID register, in combination with the Subsystem Vendor ID register (D27:F0:2Ch)
make it possible for the operating environment to distinguish one audio subsystem
from the other(s).
This register is implemented as write-once register. Once a value is written to it, the
value can be read back. Any subsequent writes will have no effect.
This register is not affected by the D3HOT to D0 transition.
T
17.1.16 CAPPTR—Capabilities Pointer Register
(Intel® High Definition Audio Controller—D27:F0)
Address Offset: 34h Attribute: RO
Default Value: 50h Size: 8 bits
This register indicates the offset for the capability pointer.
Bit Description
15:0 Subsystem Vendor ID—R/WO.
Bit Description
15:0 Subsystem ID—R/WO.
Bit Description
7:0 Capabilities Pointer (CAP_PTR)—RO. This field indicates that the first capability
pointer offset is offset 50h (Power Management Capability)
Datasheet 713
Intel® High Definition Audio Controller Registers (D27:F0)
17.1.17 INTLN—Interrupt Line Register
(Intel® High Definition Audio Controller—D27:F0)
Address Offset: 3Ch Attribute: R/W
Default Value: 00h Size: 8 bits
17.1.18 INTPN—Interrupt Pin Register
(Intel® High Definition Audio Controller—D27:F0)
Address Offset: 3Dh Attribute: RO
Default Value: See Description Size: 8 bits
17.1.19 HDCTL—Intel® High Definition Audio Control Register
(Intel® High Definition Audio Controller—D27:F0)
Address Offset: 40h Attribute: RO
Default Value: 01h Size: 8 bits
17.1.20 HDINIT1—Intel® High Definition Audio Initialization
Register 1 (Intel® High Definition
Audio Controller—D27:F0)
Address Offset: 43h Attribute: RO
Default Value: 07h Size: 8 bits
Bit Description
7:0
Interrupt Line (INT_LN)—R/W. This data is not used by the PCH. It is used to
communicate to software the interrupt line that the interrupt pin is connected to.
Note: This register is not reset by a Function Level Reset.
Bit Description
7:4 Reserved
3:0 Interrupt Pin—RO. This reflects the value of D27IP.ZIP (Chipset Config
Registers:Offset 3110h:bits 3:0).
Bit Description
7:1 Reserved
0Intel® High Definition Signal Mode—RO.
This bit is hardwired to 1 (High Definition Audio mode).
Bit Description
7 Reserved
6HDINIT1 Field 2—R/W. BIOS must set this bit to 1.
5:3 Reserved
2:0 HDINIT1 Field 1—R/W. BIOS must program this field to 111b.
Intel® High Definition Audio Controller Registers (D27:F0)
714 Datasheet
17.1.21 TCSEL—Traffic Class Select Register
(Intel® High Definition Audio Controller—D27:F0)
Address Offset: 44h Attribute: R/W
Default Value: 00h Size: 8 bits
Function Level Reset: No
This register assigned the value to be placed in the TC field. CORB and RIRB data will
always be assigned TC0.
17.1.22 DCKCTL—Docking Control Register (Mobile Only)
(Intel® High Definition Audio Controller—D27:F0)
Address Offset: 4Ch Attribute: R/W, RO
Default Value: 00h Size: 8 bits
Function Level Reset: No
Bit Description
7:3 Reserved
2:0
Intel® HIgh Definition Audio Traffic Class Assignment (TCSEL)—R/W.
This register assigns the value to be placed in the Traffic Class field for input data,
output data, and buffer descriptor transactions.
000 = TC0
001 = TC1
010 = TC2
011 = TC3
100 = TC4
101 = TC5
110 = TC6
111 = TC7
NOTE: These bits are not reset on D3HOT to D0 transition; however, they are reset by
PLTRST#.
Bit Description
7:1 Reserved
0
Dock Attach (DA)—R/W / RO. Software writes a 1 to this bit to initiate the docking
sequence on the HDA_DOCK_EN# and HDA_DOCK_RST# signals. When the docking
sequence is complete, hardware will set the Dock Mated (GSTS.DM) status bit to 1.
Software writes a 0 to this bit to initiate the undocking sequence on the
HDA_DOCK_EN# and HDA_DOCK_RST# signals. When the undocking sequence is
complete, hardware will set the Dock Mated (GSTS.DM) status bit to 0.
Note that software must check the state of the Dock Mated (GSTS.DM) bit prior to
writing to the Dock Attach bit. Software shall only change the DA bit from 0 to 1 when
DM=0. Likewise, software shall only change the DA bit from 1 to 0 when DM=1. If
these rules are violated, the results are undefined.
Note that this bit is Read Only when the DCKSTS.DS bit = 0.
Datasheet 715
Intel® High Definition Audio Controller Registers (D27:F0)
17.1.23 DCKSTS—Docking Status Register (Mobile Only)
(Intel® High Definition Audio Controller—D27:F0)
Address Offset: 4Dh Attribute: R/WO, RO
Default Value: 80h Size: 8 bits
Function Level Reset: No
17.1.24 PID—PCI Power Management Capability ID Register
(Intel® High Definition Audio Controller—D27:F0)
Address Offset: 50h–51h Attribute: R/WO, RO
Default Value: 6001h Size: 16 bits
Function Level Reset: No (Bits 7:0 only)
Bit Description
7
Docking Supported (DS)—R/WO: A 1 indicates that PCH supports HD Audio Docking.
The DCKCTL.DA bit is only writable when this DS bit is 1. ACPI BIOS software should
only branch to the docking routine when this DS bit is 1. BIOS may clear this bit to 0 to
prohibit the ACPI BIOS software from attempting to run the docking routines.
Note that this bit is reset to its default value only on a PLTRST#, but not on a CRST# or
D3hot-to-D0 transition.
6:1 Reserved
0
Dock Mated (DM)—RO: This bit effectively communicates to software that an Intel®
HD Audio docked codec is physically and electrically attached.
Controller hardware sets this bit to 1 after the docking sequence triggered by writing a
1 to the Dock Attach (GCTL.DA) bit is completed (HDA_DOCK_RST# de-assertion). This
bit indicates to software that the docked codec(s) may be discovered using the
STATESTS register and then enumerated.
Controller hardware sets this bit to 0 after the undocking sequence triggered by writing
a 0 to the Dock Attach (GCTL.DA) bit is completed (HDA_DOCK_EN# de-asserted). This
bit indicates to software that the docked codec(s) may be physically undocked.
Bit Description
15:8 Next Capability (Next)—R/WO. Points to the next capability structure (MSI).
7:0 Cap ID (CAP)—RO. Hardwired to 01h. Indicates that this pointer is a PCI power
management capability. These bits are not reset by Function Level Reset.
Intel® High Definition Audio Controller Registers (D27:F0)
716 Datasheet
17.1.25 PC—Power Management Capabilities Register
(Intel® High Definition Audio Controller—D27:F0)
Address Offset: 52h–53h Attribute: RO
Default Value: C842h Size: 16 bits
17.1.26 PCS—Power Management Control and Status Register
(Intel® High Definition Audio Controller—D27:F0)
Address Offset: 54h–57h Attribute: RO, R/W, R/WC
Default Value: 00000000h Size: 32 bits
Function Level Reset: No
Bit Description
15:11 PME Support—RO. Hardwired to 11001b. Indicates PME# can be generated from D3
and D0 states.
10 D2 Support—RO. Hardwired to 0. Indicates that D2 state is not supported.
9 D1 Support—RO. Hardwired to 0. Indicates that D1 state is not supported.
8:6 Aux Current—RO. Hardwired to 001b. Reports 55 mA maximum suspend well current
required when in the D3COLD state.
5Device Specific Initialization (DSI)—RO. Hardwired to 0. Indicates that no device
specific initialization is required.
4 Reserved
3 PME Clock (PMEC)—RO. Does not apply. Hardwired to 0.
2:0 Version—RO. Hardwired to 010b. Indicates support for version 1.1 of the PCI Power
Management Specification.
Bit Description
31:24 Data—RO. Does not apply. Hardwired to 0.
23 Bus Power/Clock Control Enable—RO. Does not apply. Hardwired to 0.
22 B2/B3 Support—RO. Does not apply. Hardwired to 0.
21:16 Reserved
15
PME Status (PMES)—R/WC.
0 = Software clears the bit by writing a 1 to it.
1 = This bit is set when the Intel® High Definition Audio controller would normally
assert the PME# signal independent of the state of the PME_EN bit (bit 8 in this
register).
This bit is in the resume well and is cleared by a power-on reset. Software must not
make assumptions about the reset state of this bit and must set it appropriately.
14:9 Reserved
8
PME Enable (PMEE)—R/W.
0 = Disable
1 = When set and if corresponding PMES also set, the Intel® High Definition Audio
controller sets the PME_B0_STS bit in the GPE0_STS register (PMBASE +28h).
This bit is in the resume well and is cleared on a power-on reset. Software must not
make assumptions about the reset state of this bit and must set it appropriately.
7:2 Reserved
Datasheet 717
Intel® High Definition Audio Controller Registers (D27:F0)
17.1.27 MID—MSI Capability ID Register
(Intel® High Definition Audio Controller—D27:F0)
Address Offset: 60h–61h Attribute: RO
Default Value: 7005h Size: 16 bits
17.1.28 MMC—MSI Message Control Register
(Intel® High Definition Audio Controller—D27:F0)
Address Offset: 62h–63h Attribute: RO, R/W
Default Value: 0080h Size: 16 bits
1:0
Power State (PS)—R/W. This field is used both to determine the current power state
of the Intel® High Definition Audio controller and to set a new power state.
00 = D0 state
11 = D3HOT state
Others = reserved
NOTES:
1. If software attempts to write a value of 01b or 10b in to this field, the write
operation must complete normally; however, the data is discarded and no state
change occurs.
2. When in the D3HOT states, the Intel® High Definition Audio controller’s configuration
space is available, but the IO and memory space are not. Additionally, interrupts are
blocked.
3. When software changes this value from D3HOT state to the D0 state, an internal
warm (soft) reset is generated, and software must re-initialize the function.
Bit Description
Bit Description
15:8 Next Capability (Next)—RO. Hardwired to 70h. Points to the PCI Express* capability
structure.
7:0 Cap ID (CAP)—RO. Hardwired to 05h. Indicates that this pointer is a MSI capability
Bit Description
15:8 Reserved
764b Address Capability (64ADD)—RO. Hardwired to 1. Indicates the ability to
generate a 64-bit message address
6:4 Multiple Message Enable (MME)—RO. Normally this is a R/W register. However since
only 1 message is supported, these bits are hardwired to 000 = 1 message.
3:1 Multiple Message Capable (MMC)—RO. Hardwired to 0 indicating request for 1
message.
0
MSI Enable (ME)—R/W.
0 = an MSI may not be generated
1 = an MSI will be generated instead of an INTx signal.
Intel® High Definition Audio Controller Registers (D27:F0)
718 Datasheet
17.1.29 MMLA—MSI Message Lower Address Register
(Intel® High Definition Audio Controller—D27:F0)
Address Offset: 64h–67h Attribute: RO, R/W
Default Value: 00000000h Size: 32 bits
17.1.30 MMUA—MSI Message Upper Address Register
(Intel® High Definition Audio Controller—D27:F0)
Address Offset: 68h–6Bh Attribute: R/W
Default Value: 00000000h Size: 32 bits
17.1.31 MMD—MSI Message Data Register
(Intel® High Definition Audio Controller—D27:F0)
Address Offset: 6Ch–6Dh Attribute: R/W
Default Value: 0000h Size: 16 bits
17.1.32 PXID—PCI Express* Capability ID Register
(Intel® High Definition Audio Controller—D27:F0)
Address Offset: 70h–71h Attribute: RO
Default Value: 0010h Size: 16 bits
Bit Description
31:2 Message Lower Address (MLA)—R/W. Lower address used for MSI message.
1:0 Reserved
Bit Description
31:0 Message Upper Address (MUA)—R/W. Upper 32-bits of address used for MSI
message.
Bit Description
15:0 Message Data (MD)—R/W. Data used for MSI message.
Bit Description
15:8 Next Capability (Next)—RO. Hardwired to 0. Indicates that this is the last capability
structure in the list.
7:0 Cap ID (CAP)—RO. Hardwired to 10h. Indicates that this pointer is a PCI Express*
capability structure.
Datasheet 719
Intel® High Definition Audio Controller Registers (D27:F0)
17.1.33 PXC—PCI Express* Capabilities Register
(Intel® High Definition Audio Controller—D27:F0)
Address Offset: 72h–73h Attribute: RO
Default Value: 0091h Size: 16 bits
17.1.34 DEVCAP—Device Capabilities Register
(Intel® High Definition Audio Controller—D27:F0)
Address Offset: 74h–77h Attribute: R/WO, RO
Default Value: 10000000h Size: 32 bits
Function Level Reset: No
Bit Description
15:14 Reserved
13:9 Interrupt Message Number (IMN)—RO. Hardwired to 0.
8 Slot Implemented (SI)—RO. Hardwired to 0.
7:4 Device/Port Type (DPT)—RO. Hardwired to 1001b. Indicates that this is a Root
Complex Integrated endpoint device.
3:0 Capability Version (CV)—RO. Hardwired to 0001b. Indicates version #1 PCI Express
capability
Bit Description
31:29 Reserved
28 Function Level Reset (FLR)—R/WO. A 1 indicates that the PCH HD Audio Controller
supports the Function Level Reset Capability.
27:26 Captured Slot Power Limit Scale (SPLS)—RO. Hardwired to 0.
25:18 Captured Slot Power Limit Value (SPLV)—RO. Hardwired to 0.
17:15 Reserved
14 Power Indicator Present—RO. Hardwired to 0.
13 Attention Indicator Present—RO. Hardwired to 0.
12 Attention Button Present—RO. Hardwired to 0.
11:9 Endpoint L1 Acceptable Latency—R/WO.
8:6 Endpoint L0s Acceptable Latency—R/WO.
5Extended Tag Field Support—RO. Hardwired to 0. Indicates 5-bit tag field support
4:3 Phantom Functions Supported—RO. Hardwired to 0. Indicates that phantom functions
not supported
2:0 Max Payload Size Supported—RO. Hardwired to 0. Indicates 128-B maximum
payload size capability
Intel® High Definition Audio Controller Registers (D27:F0)
720 Datasheet
17.1.35 DEVC—Device Control Register
(Intel® High Definition Audio Controller—D27:F0)
Address Offset: 78h–79h Attribute: R/W, RO
Default Value: 0800h Size: 16 bits
Function Level Reset: No (Bit 11 Only)
Bit Description
15
Initiate FLR (IF)—R/W. This bit is used to initiate FLR transition.
1 = A write of 1 initiates FLR transition. Since hardware does not respond to any cycles
until FLR completion, the read value by software from this bit is 0.
14:12 Max Read Request Size—RO. Hardwired to 0 enabling 128B maximum read request
size.
11
No Snoop Enable (NSNPEN)—R/W.
0 = The Intel® High Definition Audio controller will not set the No Snoop bit. In this
case, isochronous transfers will not use VC1 (VCi) even if it is enabled since VC1 is
never snooped. Isochronous transfers will use VC0.
1 = The Intel® High Definition Audio controller is permitted to set the No Snoop bit in
the Requester Attributes of a bus master transaction. In this case, VC0 or VC1 may
be used for isochronous transfers.
NOTE: This bit is not reset on D3HOT to D0 transition; however, it is reset by PLTRST#.
This bit is not reset by Function Level Reset.
10 Auxiliary Power Enable—RO. Hardwired to 0, indicating that Intel® High Definition
Audio device does not draw AUX power
9 Phantom Function Enable—RO. Hardwired to 0 disabling phantom functions.
8Extended Tag Field Enable—RO. Hardwired to 0 enabling 5-bit tag.
7:5 Max Payload Size—RO. Hardwired to 0 indicating 128B.
4 Enable Relaxed Ordering—RO. Hardwired to 0 disabling relaxed ordering.
3 Unsupported Request Reporting Enable—R/W. Not implemented.
2 Fatal Error Reporting Enable—R/W. Not implemented.
1 Non-Fatal Error Reporting Enable—R/W. Not implemented.
0 Correctable Error Reporting Enable—R/W. Not implemented.
Datasheet 721
Intel® High Definition Audio Controller Registers (D27:F0)
17.1.36 DEVS—Device Status Register
(Intel® High Definition Audio Controller—D27:F0)
Address Offset: 7Ah–7Bh Attribute: RO
Default Value: 0010h Size: 16 bits
17.1.37 VCCAP—Virtual Channel Enhanced Capability Header
(Intel® High Definition Audio Controller—D27:F0)
Address Offset: 100h–103h Attribute: R/WO
Default Value: 13010002h Size: 32 bits
Bit Description
15:6 Reserved
5
Transactions Pending—RO.
0 = Indicates that completions for all non-posted requests have been received
1 = Indicates that Intel® High Definition Audio controller has issued non-posted
requests which have not been completed.
4AUX Power Detected—RO. Hardwired to 1 indicating the device is connected to
resume power
3 Unsupported Request Detected—RO. Not implemented. Hardwired to 0.
2 Fatal Error Detected—RO. Not implemented. Hardwired to 0.
1 Non-Fatal Error Detected—RO. Not implemented. Hardwired to 0.
0 Correctable Error Detected—RO. Not implemented. Hardwired to 0.
Bit Description
31:20
Next Capability Offset—R/WO. Points to the next capability header.
130h = Root Complex Link Declaration Enhanced Capability Header
000h = Root Complex Link Declaration Enhanced Capability Header is not supported.
19:16
Capability Version—R/WO.
0h =PCI Express Virtual channel capability and the Root Complex Topology Capability
structure are not supported.
1h =PCI Express Virtual channel capability and the Root Complex Topology Capability
structure are supported.
15:0
PCI Express* Extended Capability—R/WO.
0000h =PCI Express Virtual channel capability and the Root Complex Topology
Capability structure are not supported.
0002h =PCI Express Virtual channel capability and the Root Complex Topology
Capability structure are supported.
Intel® High Definition Audio Controller Registers (D27:F0)
722 Datasheet
17.1.38 PVCCAP1—Port VC Capability Register 1
(Intel® High Definition Audio Controller—D27:F0)
Address Offset: 104h–107h Attribute: RO
Default Value: 00000001h Size: 32 bits
17.1.39 PVCCAP2—Port VC Capability Register 2
(Intel® High Definition Audio Controller—D27:F0)
Address Offset: 108h–10Bh Attribute: RO
Default Value: 00000000h Size: 32 bits
17.1.40 PVCCTL—Port VC Control Register
(Intel® High Definition Audio Controller—D27:F0)
Address Offset: 10Ch–10Dh Attribute: RO
Default Value: 0000h Size: 16 bits
Bit Description
31:12 Reserved
11:10 Port Arbitration Table Entry Size—RO. Hardwired to 0 since this is an endpoint device.
9:8 Reference Clock—RO. Hardwired to 0 since this is an endpoint device.
7Reserved
6:4 Low Priority Extended VC Count—RO. Hardwired to 0. Indicates that only VC0 belongs
to the low priority VC group
3Reserved
2:0 Extended VC Count—RO. Hardwired to 001b. Indicates that 1 extended VC (in
addition to VC0) is supported by the Intel® High Definition Audio controller.
Bit Description
31:24 VC Arbitration Table Offset—RO. Hardwired to 0 indicating that a VC arbitration table is
not present.
23:8 Reserved
7:0
VC Arbitration Capability—RO. Hardwired to 0. These bits are not applicable since the
Intel® High Definition Audio controller reports a 0 in the Low Priority Extended VC
Count bits in the PVCCAP1 register.
Bit Description
15:4 Reserved
3:1
VC Arbitration Select—RO. Hardwired to 0. Normally these bits are R/W. However, these
bits are not applicable since the Intel® High Definition Audio controller reports a 0 in
the Low Priority Extended VC Count bits in the PVCCAP1 register
0 Load VC Arbitration Table—RO. Hardwired to 0 since an arbitration table is not present.
Datasheet 723
Intel® High Definition Audio Controller Registers (D27:F0)
17.1.41 PVCSTS—Port VC Status Register
(Intel® High Definition Audio Controller—D27:F0)
Address Offset: 10Eh–10Fh Attribute: RO
Default Value: 0000h Size: 16 bits
17.1.42 VC0CAP—VC0 Resource Capability Register
(Intel® High Definition Audio Controller—D27:F0)
Address Offset: 110h–113h Attribute: RO
Default Value: 00000000h Size: 32 bits
Bit Description
15:1 Reserved
0VC Arbitration Table Status—RO. Hardwired to 0 since an arbitration table is not
present.
Bit Description
31:24 Port Arbitration Table Offset—RO. Hardwired to 0 since this field is not valid for endpoint
devices
23 Reserved
22:16 Maximum Time Slots—RO. Hardwired to 0 since this field is not valid for endpoint
devices
15 Reject Snoop Transactions—RO. Hardwired to 0 since this field is not valid for endpoint
devices.
14 Advanced Packet Switching—RO. Hardwired to 0 since this field is not valid for endpoint
devices
13:8 Reserved
7:0 Port Arbitration Capability—RO. Hardwired to 0 since this field is not valid for endpoint
devices
Intel® High Definition Audio Controller Registers (D27:F0)
724 Datasheet
17.1.43 VC0CTL—VC0 Resource Control Register
(Intel® High Definition Audio Controller—D27:F0)
Address Offset: 114h–117h Attribute: R/W, RO
Default Value: 800000FFh Size: 32 bits
Function Level Reset: No
17.1.44 VC0STS—VC0 Resource Status Register
(Intel® High Definition Audio Controller—D27:F0)
Address Offset: 11Ah–11Bh Attribute: RO
Default Value: 0000h Size: 16 bits
Bit Description
31 VC0 Enable—RO. Hardwired to 1 for VC0.
30:27 Reserved
26:24 VC0 ID—RO. Hardwired to 0 since the first VC is always assigned as VC0
23:20 Reserved
19:17 Port Arbitration Select—RO. Hardwired to 0 since this field is not valid for endpoint
devices
16 Load Port Arbitration Table—RO. Hardwired to 0 since this field is not valid for endpoint
devices
15:8 Reserved
7:0 TC/VC0 Map—R/W, RO. Bit 0 is hardwired to 1 since TC0 is always mapped VC0. Bits
[7:1] are implemented as R/W bits.
Bit Description
15:2 Reserved
1VC0 Negotiation Pending—RO. Hardwired to 0 since this bit does not apply to the
integrated Intel® High Definition Audio device
0Port Arbitration Table Status—RO. Hardwired to 0 since this field is not valid for
endpoint devices
Datasheet 725
Intel® High Definition Audio Controller Registers (D27:F0)
17.1.45 VCiCAP—VCi Resource Capability Register
(Intel® High Definition Audio Controller—D27:F0)
Address Offset: 11Ch–11Fh Attribute: RO
Default Value: 00000000h Size: 32 bits
17.1.46 VCiCTL—VCi Resource Control Register
(Intel® High Definition Audio Controller—D27:F0)
Address Offset: 120h–123h Attribute: R/W, RO
Default Value: 00000000h Size: 32 bits
Function Level Reset: No
Bit Description
31:24 Port Arbitration Table Offset—RO. Hardwired to 0 since this field is not valid for endpoint
devices.
23 Reserved
22:16 Maximum Time Slots—RO. Hardwired to 0 since this field is not valid for endpoint
devices
15 Reject Snoop Transactions—RO. Hardwired to 0 since this field is not valid for endpoint
devices
14 Advanced Packet Switching—RO. Hardwired to 0 since this field is not valid for endpoint
devices
13:8 Reserved
7:0 Port Arbitration Capability—RO. Hardwired to 0 since this field is not valid for endpoint
devices
Bit Description
31
VCi Enable—R/W.
0 = VCi is disabled
1 = VCi is enabled
NOTE: This bit is not reset on D3HOT to D0 transition; however, it is reset by PLTRST#.
30:27 Reserved
26:24 VCi ID—R/W. This field assigns a VC ID to the VCi resource. This field is not used by
the PCH hardware, but it is R/W to avoid confusing software.
23:20 Reserved
19:17 Port Arbitration Select—RO. Hardwired to 0 since this field is not valid for endpoint
devices
16 Load Port Arbitration Table—RO. Hardwired to 0 since this field is not valid for endpoint
devices
15:8 Reserved
7:0
TC/VCi Map—R/W, RO. This field indicates the TCs that are mapped to the VCi
resource. Bit 0 is hardwired to 0 indicating that it cannot be mapped to VCi. Bits [7:1]
are implemented as R/W bits. This field is not used by the PCH hardware, but it is R/W
to avoid confusing software.
Intel® High Definition Audio Controller Registers (D27:F0)
726 Datasheet
17.1.47 VCiSTS—VCi Resource Status Register
(Intel® High Definition Audio Controller—D27:F0)
Address Offset: 126h–127h Attribute: RO
Default Value: 0000h Size: 16 bits
17.1.48 RCCAP—Root Complex Link Declaration Enhanced
Capability Header Register
(Intel® High Definition Audio Controller—D27:F0)
Address Offset: 130h Attribute: RO
Default Value: 00010005h Size: 32 bits
17.1.49 ESD—Element Self Description Register
(Intel® High Definition Audio Controller—D27:F0)
Address Offset: 134h–137h Attribute: RO
Default Value: 0F000100h Size: 32 bits
Bit Description
15:2 Reserved
1 VCi Negotiation Pending—RO. Does not apply. Hardwired to 0.
0Port Arbitration Table Status—RO. Hardwired to 0 since this field is not valid for
endpoint devices.
Bit Description
31:20 Next Capability Offset—RO. Hardwired to 0 indicating this is the last capability.
19:16 Capability Version—RO. Hardwired to 1h.
15:0 PCI Express* Extended Capability ID—RO. Hardwired to 0005h.
Bit Description
31:24 Port Number—RO. Hardwired to 0Fh indicating that the Intel® High Definition Audio
controller is assigned as Port #15d.
23:16 Component ID—RO. This field returns the value of the ESD.CID field of the chip
configuration section. ESD.CID is programmed by BIOS.
15:8 Number of Link Entries—RO. The Intel® High Definition Audio only connects to one
device, the PCH egress port. Therefore, this field reports a value of 1h.
7:4 Reserved
3:0 Element Type (ELTYP)—RO. The Intel® High Definition Audio controller is an
integrated Root Complex Device. Therefore, the field reports a value of 0h.
Datasheet 727
Intel® High Definition Audio Controller Registers (D27:F0)
17.1.50 L1DESC—Link 1 Description Register
(Intel® High Definition Audio Controller—D27:F0)
Address Offset: 140h–143h Attribute: RO
Default Value: 00000001h Size: 32 bits
17.1.51 L1ADDL—Link 1 Lower Address Register
(Intel® High Definition Audio Controller—D27:F0)
Address Offset: 148h–14Bh Attribute: RO
Default Value: See Register Description Size: 32 bits
17.1.52 L1ADDU—Link 1 Upper Address Register
(Intel® High Definition Audio Controller—D27:F0)
Address Offset: 14Ch–14Fh Attribute: RO
Default Value: 00000000h Size: 32 bits
Bit Description
31:24 Target Port Number—RO. The Intel® High Definition Audio controller targets the
PCH’s Port 0.
23:16 Target Component ID—RO. This field returns the value of the ESD.CID field of the
chip configuration section. ESD.CID is programmed by BIOS.
15:2 Reserved
1Link Type—RO. Hardwired to 0 indicating Type 0.
0Link Valid—RO. Hardwired to 1.
Bit Description
31:14 Link 1 Lower Address—RO. Hardwired to match the RCBA register value in the PCI-
LPC bridge (D31:F0:F0h).
13:0 Reserved
Bit Description
31:0 Link 1 Upper Address—RO. Hardwired to 00000000h.
Intel® High Definition Audio Controller Registers (D27:F0)
728 Datasheet
17.2 Intel® High Definition Audio Memory Mapped
Configuration Registers
(Intel® High Definition Audio—D27:F0)
The base memory location for these memory mapped configuration registers is
specified in the HDBAR register (D27:F0:offset 10h and D27:F0:offset 14h). The
individual registers are then accessible at HDBAR + Offset as indicated in Table 17-2.
These memory mapped registers must be accessed in byte, word, or DWord quantities.
Note: Address locations that are not shown in Ta b l e 17-2 should be treated as Reserved.
Table 17-2. Intel® High Definition Audio PCI Register Address Map
(Intel® High Definition Audio D27:F0) (Sheet 1 of 4)
HDBAR +
Offset Mnemonic Register Name Default Access
00h–01h GCAP Global Capabilities 4401h RO
02h VMIN Minor Version 00h RO
03h VMAJ Major Version 01h RO
04h–05h OUTPAY Output Payload Capability 003Ch RO
06h–07h INPAY Input Payload Capability 001Dh RO
08h–0Bh GCTL Global Control 00000000h R/W
0Ch–0Dh WAKEEN Wake Enable 0000h R/W
0Eh–0Fh STATESTS State Change Status 0000h R/WC
10h–11h GSTS Global Status 0000h R/WC
12h–13h Rsv Reserved 0000h RO
14h–17h Rsv Reserved 00000000h RO
18h–19h OUTSTRMPAY Output Stream Payload Capability 0030h RO
1Ah–1Bh INSTRMPAY Input Stream Payload Capability 0018h RO
1Ch–1Fh Rsv Reserved 00000000h RO
20h–23h INTCTL Interrupt Control 00000000h R/W
24h–27h INTSTS Interrupt Status 00000000h RO
30h–33h WALCLK Wall Clock Counter 00000000h RO
34–37h Rsv Reserved 00000000h RO
38h–3Bh SSYNC Stream Synchronization 00000000h R/W
40h–43h CORBLBASE CORB Lower Base Address 00000000h R/W, RO
44h–47h CORBUBASE CORB Upper Base Address 00000000h R/W
48h–49h CORBWP CORB Write Pointer 0000h R/W
4Ah–4Bh CORBRP CORB Read Pointer 0000h R/W, RO
4Ch CORBCTL CORB Control 00h R/W
4Dh CORBST CORB Status 00h R/WC
4Eh CORBSIZE CORB Size 42h RO
50h–53h RIRBLBASE RIRB Lower Base Address 00000000h R/W, RO
Datasheet 729
Intel® High Definition Audio Controller Registers (D27:F0)
54h–57h RIRBUBASE RIRB Upper Base Address 00000000h R/W
58h–59h RIRBWP RIRB Write Pointer 0000h R/W, RO
5Ah–5Bh RINTCNT Response Interrupt Count 0000h R/W
5Ch RIRBCTL RIRB Control 00h R/W
5Dh RIRBSTS RIRB Status 00h R/WC
5Eh RIRBSIZE RIRB Size 42h RO
60h–63h IC Immediate Command 00000000h R/W
64h–67h IR Immediate Response 00000000h RO
68h–69h ICS Immediate Command Status 0000h R/W, R/
WC
70h–73h DPLBASE DMA Position Lower Base Address 00000000h R/W, RO
74h–77h DPUBASE DMA Position Upper Base Address 00000000h R/W
80–82h ISD0CTL Input Stream Descriptor 0 (ISD0)
Control 040000h R/W, RO
83h ISD0STS ISD0 Status 00h R/WC, RO
84h–87h ISD0LPIB ISD0 Link Position in Buffer 00000000h RO
88h–8Bh ISD0CBL ISD0 Cyclic Buffer Length 00000000h R/W
8Ch–8Dh ISD0LVI ISD0 Last Valid Index 0000h R/W
8Eh–8F ISD0FIFOW ISD0 FIFO Watermark 0004h R/W
90h–91h ISD0FIFOS ISD0 FIFO Size 0077h RO
92h–93h ISD0FMT ISD0 Format 0000h R/W
98h–9Bh ISD0BDPL ISD0 Buffer Descriptor List Pointer-
Lower Base Address 00000000h R/W, RO
9Ch–9Fh ISD0BDPU ISD0 Buffer Description List Pointer-
Upper Base Address 00000000h R/W
A0h–A2h ISD1CTL Input Stream Descriptor 1(ISD01)
Control 040000h R/W, RO
A3h ISD1STS ISD1 Status 00h R/WC, RO
A4h–A7h ISD1LPIB ISD1 Link Position in Buffer 00000000h RO
A8h–ABh ISD1CBL ISD1 Cyclic Buffer Length 00000000h R/W
ACh–ADh ISD1LVI ISD1 Last Valid Index 0000h R/W
AEh–AFh ISD1FIFOW ISD1 FIFO Watermark 0004h R/W
B0h–B1h ISD1FIFOS ISD1 FIFO Size 0077h RO
B2h–B3h ISD1FMT ISD1 Format 0000h R/W
B8h–BBh ISD1BDPL ISD1 Buffer Descriptor List Pointer-
Lower Base Address 00000000h R/W, RO
BCh–BFh ISD1BDPU ISD1 Buffer Description List Pointer-
Upper Base Address 00000000h R/W
Table 17-2. Intel® High Definition Audio PCI Register Address Map
(Intel® High Definition Audio D27:F0) (Sheet 2 of 4)
HDBAR +
Offset Mnemonic Register Name Default Access
Intel® High Definition Audio Controller Registers (D27:F0)
730 Datasheet
C0h–C2h ISD2CTL Input Stream Descriptor 2 (ISD2)
Control 040000h R/W, RO
C3h ISD2STS ISD2 Status 00h R/WC, RO
C4h–C7h ISD2LPIB ISD2 Link Position in Buffer 00000000h RO
C8h–CBh ISD2CBL ISD2 Cyclic Buffer Length 00000000h R/W
CCh–CDh ISD2LVI ISD2 Last Valid Index 0000h R/W
CEh–CFh ISD1FIFOW ISD1 FIFO Watermark 0004h R/W
D0h–D1h ISD2FIFOS ISD2 FIFO Size 0077h RO
D2h–D3h ISD2FMT ISD2 Format 0000h R/W
D8h–DBh ISD2BDPL ISD2 Buffer Descriptor List Pointer-
Lower Base Address 00000000h R/W, RO
DCh–DFh ISD2BDPU ISD2 Buffer Description List Pointer-
Upper Base Address 00000000h R/W
E0h–E2h ISD3CTL Input Stream Descriptor 3 (ISD3)
Control 040000h R/W, RO
E3h ISD3STS ISD3 Status 00h R/WC, RO
E4h–E7h ISD3LPIB ISD3 Link Position in Buffer 00000000h RO
E8h–EBh ISD3CBL ISD3 Cyclic Buffer Length 00000000h R/W
ECh–EDh ISD3LVI ISD3 Last Valid Index 0000h R/W
EEh–EFh ISD3FIFOW ISD3 FIFO Watermark 0004h R/W
F0h–F1h ISD3FIFOS ISD3 FIFO Size 0077h RO
F2h–F3h ISD3FMT ISD3 Format 0000h R/W
F8h–FBh ISD3BDPL ISD3 Buffer Descriptor List Pointer-
Lower Base Address 00000000h R/W, RO
FCh–FFh ISD3BDPU ISD3 Buffer Description List Pointer-
Upper Base Address 00000000h R/W
100h–102h OSD0CTL Output Stream Descriptor 0 (OSD0)
Control 040000h R/W, RO
103h OSD0STS OSD0 Status 00h R/WC, RO
104h–107h OSD0LPIB OSD0 Link Position in Buffer 00000000h RO
108h–10Bh OSD0CBL OSD0 Cyclic Buffer Length 00000000h R/W
10Ch–10Dh OSD0LVI OSD0 Last Valid Index 0000h R/W
10Eh–10Fh OSD0FIFOW OSD0 FIFO Watermark 0004h R/W
110h–111h OSD0FIFOS OSD0 FIFO Size 00BFh R/W
112–113h OSD0FMT OSD0 Format 0000h R/W
118h–11Bh OSD0BDPL OSD0 Buffer Descriptor List Pointer-
Lower Base Address 00000000h R/W, RO
11Ch–11Fh OSD0BDPU OSD0 Buffer Description List Pointer-
Upper Base Address 00000000h R/W
Table 17-2. Intel® High Definition Audio PCI Register Address Map
(Intel® High Definition Audio D27:F0) (Sheet 3 of 4)
HDBAR +
Offset Mnemonic Register Name Default Access
Datasheet 731
Intel® High Definition Audio Controller Registers (D27:F0)
120h–122h OSD1CTL Output Stream Descriptor 1 (OSD1)
Control 040000h R/W, RO
123h OSD1STS OSD1 Status 00h R/WC, RO
124h–127h OSD1LPIB OSD1 Link Position in Buffer 00000000h RO
128h–12Bh OSD1CBL OSD1 Cyclic Buffer Length 00000000h R/W
12Ch–12Dh OSD1LVI OSD1 Last Valid Index 0000h R/W
12Eh–12Fh OSD1FIFOW OSD1 FIFO Watermark 0004h R/W
130h–131h OSD1FIFOS OSD1 FIFO Size 00BFh R/W
132h–133h OSD1FMT OSD1 Format 0000h R/W
138h–13Bh OSD1BDPL OSD1 Buffer Descriptor List Pointer-
Lower Base Address 00000000h R/W, RO
13Ch–13Fh OSD1BDPU OSD1 Buffer Description List Pointer-
Upper Base Address 00000000h R/W
140h–142h OSD2CTL Output Stream Descriptor 2 (OSD2)
Control 040000h R/W, RO
143h OSD2STS OSD2 Status 00h R/WC, RO
144h–147h OSD2LPIB OSD2 Link Position in Buffer 00000000h RO
148h–14Bh OSD2CBL OSD2 Cyclic Buffer Length 00000000h R/W
14Ch–14Dh OSD2LVI OSD2 Last Valid Index 0000h R/W
14Eh–14Fh OSD2FIFOW OSD2 FIFO Watermark 0004h R/W
150h–151h OSD2FIFOS OSD2 FIFO Size 00BFh R/W
152h–153h OSD2FMT OSD2 Format 0000h R/W
158h–15Bh OSD2BDPL OSD2 Buffer Descriptor List Pointer-
Lower Base Address 00000000h R/W, RO
15Ch–15Fh OSD2BDPU OSD2 Buffer Description List Pointer-
Upper Base Address 00000000h R/W
160h–162h OSD3CTL Output Stream Descriptor 3 (OSD3)
Control 040000h R/W, RO
163h OSD3STS OSD3 Status 00h R/WC, RO
164h–167h OSD3LPIB OSD3 Link Position in Buffer 00000000h RO
168h–16Bh OSD3CBL OSD3 Cyclic Buffer Length 00000000h R/W
16Ch–16Dh OSD3LVI OSD3 Last Valid Index 0000h R/W
16Eh–16Fh OSD3FIFOW OSD3 FIFO Watermark 0004h R/W
170h–171h OSD3FIFOS OSD3 FIFO Size 00BFh R/W
172h–173h OSD3FMT OSD3 Format 0000h R/W
178h–17Bh OSD3BDPL OSD3 Buffer Descriptor List Pointer-
Lower Base Address 00000000h R/W, RO
17Ch–17Fh OSD3BDPU OSD3 Buffer Description List Pointer-
Upper Base Address 00000000h R/W
Table 17-2. Intel® High Definition Audio PCI Register Address Map
(Intel® High Definition Audio D27:F0) (Sheet 4 of 4)
HDBAR +
Offset Mnemonic Register Name Default Access
Intel® High Definition Audio Controller Registers (D27:F0)
732 Datasheet
17.2.1 GCAP—Global Capabilities Register
(Intel® High Definition Audio Controller—D27:F0)
Memory Address:HDBAR + 00h Attribute: RO
Default Value: 4401h Size: 16 bits
17.2.2 VMIN—Minor Version Register
(Intel® High Definition Audio Controller—D27:F0)
Memory Address:HDBAR + 02h Attribute: RO
Default Value: 00h Size: 8 bits
17.2.3 VMAJ—Major Version Register
(Intel® High Definition Audio Controller—D27:F0)
Memory Address:HDBAR + 03h Attribute: RO
Default Value: 01h Size: 8 bits
Bit Description
15:12 Number of Output Stream Supported—RO. Hardwired to 0100b indicating that the
PCH’s Intel® High Definition Audio controller supports 4 output streams.
11:8 Number of Input Stream Supported—RO. Hardwired to 0100b indicating that the
PCH’s Intel® High Definition Audio controller supports 4 input streams.
7:3 Number of Bidirectional Stream Supported—RO. Hardwired to 0 indicating that the
PCH’s Intel® High Definition Audio controller supports 0 bidirectional stream.
2 Reserved
1Number of Serial Data Out Signals—RO. Hardwired to 0 indicating that the PCH’s
Intel® High Definition Audio controller supports 1 serial data output signal.
0
64-bit Address Supported—RO. Hardwired to 1b indicating that the PCH’s Intel®
High Definition Audio controller supports 64-bit addressing for BDL addresses, data
buffer addressees, and command buffer addresses.
Bit Description
7:0 Minor Version—RO. Hardwired to 0 indicating that the PCH supports minor revision
number 00h of the Intel® High Definition Audio specification.
Bit Description
7:0 Major Version—RO. Hardwired to 01h indicating that the PCH supports major revision
number 1 of the Intel® High Definition Audio specification.
Datasheet 733
Intel® High Definition Audio Controller Registers (D27:F0)
17.2.4 OUTPAY—Output Payload Capability Register
(Intel® High Definition Audio Controller—D27:F0)
Memory Address:HDBAR + 04h Attribute: RO
Default Value: 003Ch Size: 16 bits
17.2.5 INPAY—Input Payload Capability Register
(Intel® High Definition Audio Controller—D27:F0)
Memory Address:HDBAR + 06h Attribute: RO
Default Value: 001Dh Size: 16 bits
Bit Description
15:7 Reserved
6:0
Output Payload Capability—RO. Hardwired to 3Ch indicating 60 word payload.
This field indicates the total output payload available on the link. This does not include
bandwidth used for command and control. This measurement is in 16-bit word
quantities per 48 MHz frame. The default link clock of 24.000 MHz (the data is double
pumped) provides 1000 bits per frame, or 62.5 words in total. 40 bits are used for
command and control, leaving 60 words available for data payload.
00h = 0 word
01h = 1 word payload.
.....
FFh = 256 word payload.
Bit Description
15:7 Reserved
6:0
Input Payload Capability—RO. Hardwired to 1Dh indicating 29 word payload.
This field indicates the total output payload available on the link. This does not include
bandwidth used for response. This measurement is in 16-bit word quantities per
48 MHz frame. The default link clock of 24.000 MHz provides 500 bits per frame, or
31.25 words in total. 36 bits are used for response, leaving 29 words available for data
payload.
00h = 0 word
01h = 1 word payload.
.....
FFh = 256 word payload.
Intel® High Definition Audio Controller Registers (D27:F0)
734 Datasheet
17.2.6 GCTL—Global Control Register
(Intel® High Definition Audio Controller—D27:F0)
Memory Address:HDBAR + 08h Attribute: R/W
Default Value: 00000000h Size: 32 bits
Bit Description
31:9 Reserved
8
Accept Unsolicited Response Enable—R/W.
0 = Unsolicited responses from the codecs are not accepted.
1 = Unsolicited response from the codecs are accepted by the controller and placed
into the Response Input Ring Buffer.
7:2 Reserved
1
Flush Control—R/W. Writing a 1 to this bit initiates a flush. When the flush
completion is received by the controller, hardware sets the Flush Status bit and clears
this Flush Control bit. Before a flush cycle is initiated, the DMA Position Buffer must be
programmed with a valid memory address by software, but the DMA Position Buffer bit
0 needs not be set to enable the position reporting mechanism. Also, all streams must
be stopped (the associated RUN bit must be 0).
When the flush is initiated, the controller will flush the pipelines to memory to ensure
that the hardware is ready to transition to a D3 state. Setting this bit is not a critical
step in the power state transition if the content of the FIFOs is not critical.
0
Controller Reset #—R/W.
0 = Writing a 0 causes the Intel® High Definition Audio controller to be reset. All state
machines, FIFOs, and non-resume well memory mapped configuration registers
(not PCI configuration registers) in the controller will be reset. The Intel® High
Definition Audio link RESET# signal will be asserted, and all other link signals will
be driven to their default values. After the hardware has completed sequencing
into the reset state, it will report a 0 in this bit. Software must read a 0 from this
bit to verify the controller is in reset.
1 = Writing a 1 causes the controller to exit its reset state and de-assert the Intel®
High Definition Audio link RESET# signal. Software is responsible for setting/
clearing this bit such that the minimum Intel® High Definition Audio link RESET#
signal assertion pulse width specification is met. When the controller hardware is
ready to begin operation, it will report a 1 in this bit. Software must read a 1 from
this bit before accessing any controller registers. This bit defaults to a 0 after
Hardware reset, therefore, software needs to write a 1 to this bit to begin
operation.
NOTES:
1. The CORB/RIRB RUN bits and all stream RUN bits must be verified cleared to 0
before writing a 0 to this bit to assure a clean re-start.
2. When setting or clearing this bit, software must ensure that minimum link timing
requirements (minimum RESET# assertion time, etc.) are met.
3. When this bit is 0 indicating that the controller is in reset, writes to all Intel High
Definition Audio memory mapped registers are ignored as if the device is not
present. The only exception is this register itself. The Global Control register is
write-able as a DWord, Word, or Byte even when CRST# (this bit) is 0 if the byte
enable for the byte containing the CRST# bit (Byte Enable 0) is active. If Byte
Enable 0 is not active, writes to the Global Control register will be ignored when
CRST# is 0. When CRST# is 0, reads to Intel High Definition Audio memory
mapped registers will return their default value except for registers that are not
reset with PLTRST# or on a D3HOT to D0 transition.
Datasheet 735
Intel® High Definition Audio Controller Registers (D27:F0)
17.2.7 WAKEEN—Wake Enable Register
(Intel® High Definition Audio Controller—D27:F0)
Memory Address: HDBAR + 0Ch Attribute: R/W
Default Value: 0000h Size: 16 bits
Function Level Reset: No
17.2.8 STATESTS—State Change Status Register
(Intel® High Definition Audio Controller—D27:F0)
Memory Address: HDBAR + 0Eh Attribute: R/WC
Default Value: 0000h Size: 16 bits
Function Level Reset: No
Bit Description
15:4 Reserved
3:0
SDIN Wake Enable Flags—R/W. These bits control which SDI signal(s) may generate
a wake event. A 1b in the bit mask indicates that the associated SDIN signal is enabled
to generate a wake.
Bit 0 is used for SDI[0]
Bit 1 is used for SDI[1]
Bit 2 is used for SDI[2]
Bit 3 is used for SDI[3]
NOTE: These bits are in the resume well and only cleared on a power on reset.
Software must not make assumptions about the reset state of these bits and
must set them appropriately.
Bit Description
15:4 Reserved
3:0
SDIN State Change Status Flags—R/WC. Flag bits that indicate which SDI signal(s)
received a state change event. The bits are cleared by writing 1s to them.
Bit 0 = SDI[0]
Bit 1 = SDI[1]
Bit 2 = SDI[2]
Bit 3 = SDI[3]
These bits are in the resume well and only cleared on a power on reset. Software must
not make assumptions about the reset state of these bits and must set them
appropriately.
Intel® High Definition Audio Controller Registers (D27:F0)
736 Datasheet
17.2.9 GSTS—Global Status Register
(Intel® High Definition Audio Controller—D27:F0)
Memory Address:HDBAR + 10h Attribute: R/WC
Default Value: 0000h Size: 16 bits
17.2.10 OUTSTRMPAY—Output Stream Payload Capability
Register (Intel® High Definition Audio Controller—D27:F0)
Memory Address:HDBAR + 18h Attribute: RO
Default Value: 0030h Size: 16 bits
Bit Description
15:2 Reserved
1
Flush Status—R/WC. This bit is set to 1 by hardware to indicate that the flush cycle
initiated when the Flush Control bit (HDBAR + 08h, bit 1) was set has completed.
Software must write a 1 to clear this bit before the next time the Flush Control bit is
set to clear the bit.
0 Reserved
Bit Description
15:8 Reserved
7:0
Output Stream Payload Capability (OUTSTRMPAY)—RO: Indicates maximum
number of words per frame for any single output stream. This measurement is in 16 bit
word quantities per 48 kHz frame. 48 Words (96B) is the maximum supported,
therefore a value of 30h is reported in this register. Software must ensure that a format
which would cause more words per frame than indicated is not programmed into the
Output Stream Descriptor register.
00h = 0 words
01h = 1 word payload
FFh = 255h word payload
Datasheet 737
Intel® High Definition Audio Controller Registers (D27:F0)
17.2.11 INSTRMPAY—Input Stream Payload Capability
Register (Intel® High Definition Audio Controller—D27:F0)
Memory Address:HDBAR + 1Ah Attribute: RO
Default Value: 0018h Size: 16 bits
17.2.12 INTCTL—Interrupt Control Register
(Intel® High Definition Audio Controller—D27:F0)
Memory Address:HDBAR + 20h Attribute: R/W
Default Value: 00000000h Size: 32 bits
Bit Description
15:8 Reserved
7:0
Input Stream Payload Capability (INSTRMPAY)—RO. Indicates maximum number
of words per frame for any single input stream. This measurement is in 16 bit word
quantities per 48 kHz frame. 24 Words (48B) is the maximum supported, therefore a
value of 18h is reported in this register. Software must ensure that a format which
would cause more words per frame than indicated is not programmed into the Input
Stream Descriptor register.
00h = 0 words
01h = 1 word payload
FFh = 255h word payload
Bit Description
31
Global Interrupt Enable (GIE)—R/W. Global bit to enable device interrupt
generation.
1 = When set to 1, the Intel High Definition Audio function is enabled to generate an
interrupt. This control is in addition to any bits in the bus specific address space,
such as the Interrupt Enable bit in the PCI configuration space.
NOTE: This bit is not affected by the D3HOT to D0 transition.
30
Controller Interrupt Enable (CIE)—R/W. Enables the general interrupt for controller
functions.
1 = When set to 1, the controller generates an interrupt when the corresponding status
bit gets set due to a Response Interrupt, a Response Buffer Overrun, and State
Change events.
NOTE: This bit is not affected by the D3HOT to D0 transition.
29:8 Reserved
Intel® High Definition Audio Controller Registers (D27:F0)
738 Datasheet
17.2.13 INTSTS—Interrupt Status Register
(Intel® High Definition Audio Controller—D27:F0)
Memory Address:HDBAR + 24h Attribute: RO
Default Value: 00000000h Size: 32 bits
7:0
Stream Interrupt Enable (SIE)—R/W. When set to 1, the individual streams are
enabled to generate an interrupt when the corresponding status bits get set.
A stream interrupt will be caused as a result of a buffer with IOC = 1in the BDL entry
being completed, or as a result of a FIFO error (underrun or overrun) occurring. Control
over the generation of each of these sources is in the associated Stream Descriptor.
The streams are numbered and the SIE bits assigned sequentially, based on their order
in the register set.
Bit 0 = input stream 1
Bit 1 = input stream 2
Bit 2 = input stream 3
Bit 3 = input stream 4
Bit 4 = output stream 1
Bit 5 = output stream 2
Bit 6 = output stream 3
Bit 7 = output stream 4
Bit Description
Bit Description
31
Global Interrupt Status (GIS)RO. This bit is an OR of all the interrupt status bits in
this register.
NOTE: This bit is not affected by the D3HOT to D0 transition.
30
Controller Interrupt Status (CIS)—RO. Status of general controller interrupt.
1 = Interrupt condition occurred due to a Response Interrupt, a Response Buffer
Overrun Interrupt, or a SDIN State Change event. The exact cause can be
determined by interrogating other registers. This bit is an OR of all of the stated
interrupt status bits for this register.
NOTES:
1. This bit is set regardless of the state of the corresponding interrupt enable bit,
but a hardware interrupt will not be generated unless the corresponding enable
bit is set.
2. This bit is not affected by the D3HOT to D0 transition.
29:8 Reserved
7:0
Stream Interrupt Status (SIS)—RO.
1 = Interrupt condition occurred on the corresponding stream. This bit is an OR of all of
the stream’s interrupt status bits.
NOTE: These bits are set regardless of the state of the corresponding interrupt enable
bits.
The streams are numbered and the SIE bits assigned sequentially, based on their order
in the register set.
Bit 0 = input stream 1
Bit 1 = input stream 2
Bit 2 = input stream 3
Bit 3 = input stream 4
Bit 4 = output stream 1
Bit 5 = output stream 2
Bit 6 = output stream 3
Bit 7 = output stream 4
Datasheet 739
Intel® High Definition Audio Controller Registers (D27:F0)
17.2.14 WALCLK—Wall Clock Counter Register
(Intel® High Definition Audio Controller—D27:F0)
Memory Address:HDBAR + 30h Attribute: RO
Default Value: 00000000h Size: 32 bits
17.2.15 SSYNC—Stream Synchronization Register
(Intel® High Definition Audio Controller—D27:F0)
Memory Address:HDBAR + 38h Attribute: R/W
Default Value: 00000000h Size: 32 bits
Bit Description
31:0
Wall Clock Counter—RO. A 32-bit counter that is incremented on each link Bit Clock
period and rolls over from FFFF FFFFh to 0000 0000h. This counter will roll over to 0
with a period of approximately 179 seconds.
This counter is enabled while the Bit Clock bit is set to 1. Software uses this counter to
synchronize between multiple controllers. Will be reset on controller reset.
Bit Description
31:8 Reserved
7:0
Stream Synchronization (SSYNC)—R/W. When set to 1, these bits block data from
being sent on or received from the link. Each bit controls the associated stream
descriptor (that is, bit 0 corresponds to the first stream descriptor, etc.)
To synchronously start a set of DMA engines, these bits are first set to 1. The RUN bits
for the associated stream descriptors are then set to 1 to start the DMA engines. When
all streams are ready (FIFORDY =1), the associated SSYNC bits can all be set to 0 at
the same time, and transmission or reception of bits to or from the link will begin
together at the start of the next full link frame.
To synchronously stop the streams, fist these bits are set, and then the individual RUN
bits in the stream descriptor are cleared by software.
If synchronization is not desired, these bits may be left as 0, and the stream will simply
begin running normally when the stream’s RUN bit is set.
The streams are numbered and the SIE bits assigned sequentially, based on their order
in the register set.
Bit 0 = input stream 1
Bit 1 = input stream 2
Bit 2 = input stream 3
Bit 3 = input stream 4
Bit 4 = output stream 1
Bit 5 = output stream 2
Bit 6 = output stream 3
Bit 7 = output stream 4
Intel® High Definition Audio Controller Registers (D27:F0)
740 Datasheet
17.2.16 CORBLBASE—CORB Lower Base Address Register
(Intel® High Definition Audio Controller—D27:F0)
Memory Address:HDBAR + 40h Attribute: R/W, RO
Default Value: 00000000h Size: 32 bits
17.2.17 CORBUBASE—CORB Upper Base Address Register
(Intel® High Definition Audio Controller—D27:F0)
Memory Address:HDBAR + 44h Attribute: R/W
Default Value: 00000000h Size: 32 bits
17.2.18 CORBWP—CORB Write Pointer Register
(Intel® High Definition Audio Controller—D27:F0)
Memory Address:HDBAR + 48h Attribute: R/W
Default Value: 0000h Size: 16 bits
Bit Description
31:7
CORB Lower Base Address—R/W. Lower address of the Command Output Ring
Buffer, allowing the CORB base address to be assigned on any 128-B boundary. This
register field must not be written when the DMA engine is running or the DMA transfer
may be corrupted.
6:0 CORB Lower Base Unimplemented Bits—RO. Hardwired to 0. This required the
CORB to be allocated with 128B granularity to allow for cache line fetch optimizations.
Bit Description
31:0
CORB Upper Base Address—R/W. Upper 32 bits of the address of the Command
Output Ring buffer. This register field must not be written when the DMA engine is
running or the DMA transfer may be corrupted.
Bit Description
15:8 Reserved
7:0
CORB Write Pointer—R/W. Software writes the last valid CORB entry offset into this
field in DWord granularity. The DMA engine fetches commands from the CORB until the
Read pointer matches the Write pointer. Supports 256 CORB entries (256x4B = 1KB).
This register field may be written when the DMA engine is running.
Datasheet 741
Intel® High Definition Audio Controller Registers (D27:F0)
17.2.19 CORBRP—CORB Read Pointer Register
(Intel® High Definition Audio Controller—D27:F0)
Memory Address:HDBAR + 4Ah Attribute: R/W, RO
Default Value: 0000h Size: 16 bits
17.2.20 CORBCTL—CORB Control Register
(Intel® High Definition Audio Controller—D27:F0)
Memory Address:HDBAR + 4Ch Attribute: R/W
Default Value: 00h Size: 8 bits
Bit Description
15
CORB Read Pointer Reset—R/W. Software writes a 1 to this bit to reset the CORB
Read Pointer to 0 and clear any residual prefetched commands in the CORB hardware
buffer within the Intel High Definition Audio controller. The hardware will physically
update this bit to 1 when the CORB Pointer reset is complete. Software must read a 1
to verify that the reset completed correctly. Software must clear this bit back to 0 and
read back the 0 to verify that the clear completed correctly. The CORB DMA engine
must be stopped prior to resetting the Read Pointer or else DMA transfer may be
corrupted.
14:8 Reserved
7:0
CORB Read Pointer (CORBRP)—RO. Software reads this field to determine how
many commands it can write to the CORB without over-running. The value read
indicates the CORB Read Pointer offset in DWord granularity. The offset entry read from
this field has been successfully fetched by the DMA controller and may be over-written
by software. Supports 256 CORB entries (256 x 4B=1KB). This field may be read while
the DMA engine is running.
Bit Description
7:2 Reserved
1
Enable CORB DMA Engine—R/W.
0 = DMA stop
1 = DMA run
After software writes a 0 to this bit, the hardware may not stop immediately. The
hardware will physically update the bit to 0 when the DMA engine is truly stopped.
Software must read a 0 from this bit to verify that the DMA engine is truly stopped.
0
CORB Memory Error Interrupt Enable—R/W.
If this bit is set, the controller will generate an interrupt if the CMEI status bit (HDBAR
+ 4Dh: bit 0) is set.
Intel® High Definition Audio Controller Registers (D27:F0)
742 Datasheet
17.2.21 CORBST—CORB Status Register
(Intel® High Definition Audio Controller—D27:F0)
Memory Address:HDBAR + 4Dh Attribute: R/WC
Default Value: 00h Size: 8 bits
17.2.22 CORBSIZE—CORB Size Register
Intel® High Definition Audio Controller—D27:F0)
Memory Address:HDBAR + 4Eh Attribute: RO
Default Value: 42h Size: 8 bits
17.2.23 RIRBLBASE—RIRB Lower Base Address Register
(Intel® High Definition Audio Controller—D27:F0)
Memory Address:HDBAR + 50h Attribute: R/W, RO
Default Value: 00000000h Size: 32 bits
Bit Description
7:1 Reserved
0
CORB Memory Error Indication (CMEI)—R/WC.
1 = Controller detected an error in the path way between the controller and memory.
This may be an ECC bit error or any other type of detectable data error which
renders the command data fetched invalid.
Software can clear this bit by writing a 1 to it. However, this type of error leaves the
audio subsystem in an un-viable state and typically requires a controller reset by
writing a 0 to the Controller Reset # bit (HDBAR + 08h: bit 0).
Bit Description
7:4 CORB Size Capability—RO. Hardwired to 0100b indicating that the PCH only supports
a CORB size of 256 CORB entries (1024B)
3:2 Reserved
1:0 CORB Size—RO. Hardwired to 10b which sets the CORB size to 256 entries (1024B)
Bit Description
31:7
RIRB Lower Base Address—R/W. Lower address of the Response Input Ring Buffer,
allowing the RIRB base address to be assigned on any 128-B boundary. This register
field must not be written when the DMA engine is running or the DMA transfer may be
corrupted.
6:0 RIRB Lower Base Unimplemented Bits—RO. Hardwired to 0. This required the RIRB to
be allocated with 128-B granularity to allow for cache line fetch optimizations.
Datasheet 743
Intel® High Definition Audio Controller Registers (D27:F0)
17.2.24 RIRBUBASE—RIRB Upper Base Address Register
(Intel® High Definition Audio Controller—D27:F0)
Memory Address:HDBAR + 54h Attribute: R/W
Default Value: 00000000h Size: 32 bits
17.2.25 RIRBWP—RIRB Write Pointer Register
(Intel® High Definition Audio Controller—D27:F0)
Memory Address:HDBAR + 58h Attribute: R/W, RO
Default Value: 0000h Size: 16 bits
Bit Description
31:0
RIRB Upper Base Address—R/W. Upper 32 bits of the address of the Response Input
Ring Buffer. This register field must not be written when the DMA engine is running or
the DMA transfer may be corrupted.
Bit Description
15
RIRB Write Pointer Reset—R/W. Software writes a 1 to this bit to reset the RIRB
Write Pointer to 0. The RIRB DMA engine must be stopped prior to resetting the Write
Pointer or else DMA transfer may be corrupted.
This bit is always read as 0.
14:8 Reserved
7:0
RIRB Write Pointer (RIRBWP)RO. Indicates the last valid RIRB entry written by
the DMA controller. Software reads this field to determine how many responses it can
read from the RIRB. The value read indicates the RIRB Write Pointer offset in 2 DWord
RIRB entry units (since each RIRB entry is 2 DWords long). Supports up to 256 RIRB
entries (256 x 8 B = 2 KB). This register field may be written when the DMA engine is
running.
Intel® High Definition Audio Controller Registers (D27:F0)
744 Datasheet
17.2.26 RINTCNT—Response Interrupt Count Register
(Intel® High Definition Audio Controller—D27:F0)
Memory Address:HDBAR + 5Ah Attribute: R/W
Default Value: 0000h Size: 16 bits
17.2.27 RIRBCTL—RIRB Control Register
(Intel® High Definition Audio Controller—D27:F0)
Memory Address:HDBAR + 5Ch Attribute: R/W
Default Value: 00h Size: 8 bits
Bit Description
15:8 Reserved
7:0
N Response Interrupt Count—R/W.
0000 0001b = 1 response sent to RIRB
...........
1111 1111b = 255 responses sent to RIRB
0000 0000b = 256 responses sent to RIRB
The DMA engine should be stopped when changing this field or else an interrupt may be
lost.
Note that each response occupies 2 DWords in the RIRB.
This is compared to the total number of responses that have been returned, as opposed
to the number of frames in which there were responses. If more than one codecs
responds in one frame, then the count is increased by the number of responses
received in the frame.
Bit Description
7:3 Reserved
2
Response Overrun Interrupt Control—R/W. If this bit is set, the hardware will
generate an interrupt when the Response Overrun Interrupt Status bit (HDBAR + 5Dh:
bit 2) is set.
1
Enable RIRB DMA Engine—R/W.
0 = DMA stop
1 = DMA run
After software writes a 0 to this bit, the hardware may not stop immediately. The
hardware will physically update the bit to 0 when the DMA engine is truly stopped.
Software must read a 0 from this bit to verify that the DMA engine is truly stopped.
0
Response Interrupt Control—R/W.
0 = Disable Interrupt
1 = Generate an interrupt after N number of responses are sent to the RIRB buffer OR
when an empty Response slot is encountered on all SDI[x] inputs (whichever
occurs first). The N counter is reset when the interrupt is generated.
Datasheet 745
Intel® High Definition Audio Controller Registers (D27:F0)
17.2.28 RIRBSTS—RIRB Status Register
(Intel® High Definition Audio Controller—D27:F0)
Memory Address:HDBAR + 5Dh Attribute: R/WC
Default Value: 00h Size: 8 bits
17.2.29 RIRBSIZE—RIRB Size Register
(Intel® High Definition Audio Controller—D27:F0)
Memory Address:HDBAR + 5Eh Attribute: RO
Default Value: 42h Size: 8 bits
17.2.30 IC—Immediate Command Register
(Intel® High Definition Audio Controller—D27:F0)
Memory Address:HDBAR + 60h Attribute: R/W
Default Value: 00000000h Size: 32 bits
Bit Description
7:3 Reserved
2
Response Overrun Interrupt Status—R/WC.
1 = Software sets this bit to 1 when the RIRB DMA engine is not able to write the
incoming responses to memory before additional incoming responses overrun the
internal FIFO. When the overrun occurs, the hardware will drop the responses
which overrun the buffer. An interrupt may be generated if the Response Overrun
Interrupt Control bit is set. Note that this status bit is set even if an interrupt is not
enabled for this event.
Software clears this bit by writing a 1 to it.
1 Reserved
0
Response Interrupt—R/WC.
1 = Hardware sets this bit to 1 when an interrupt has been generated after N number
of Responses are sent to the RIRB buffer OR when an empty Response slot is
encountered on all SDI[x] inputs (whichever occurs first). Note that this status bit
is set even if an interrupt is not enabled for this event.
Software clears this bit by writing a 1 to it.
Bit Description
7:4 RIRB Size Capability—RO. Hardwired to 0100b indicating that the PCH only supports
a RIRB size of 256 RIRB entries (2048B)
3:2 Reserved
1:0 RIRB Size—RO. Hardwired to 10b which sets the CORB size to 256 entries (2048B)
Bit Description
31:0
Immediate Command Write—R/W. The command to be sent to the codec using the
Immediate Command mechanism is written to this register. The command stored in this
register is sent out over the link during the next available frame after a 1 is written to
the ICB bit (HDBAR + 68h: bit 0)
Intel® High Definition Audio Controller Registers (D27:F0)
746 Datasheet
17.2.31 IR—Immediate Response Register
(Intel® High Definition Audio Controller—D27:F0)
Memory Address:HDBAR + 64h Attribute: RO
Default Value: 00000000h Size: 32 bits
17.2.32 ICS—Immediate Command Status Register
(Intel® High Definition Audio Controller—D27:F0)
Memory Address:HDBAR + 68h Attribute: R/W, R/WC
Default Value: 0000h Size: 16 bits
Bit Description
31:0
Immediate Response Read (IRR)—RO. This register contains the response received
from a codec resulting from a command sent using the Immediate Command
mechanism.
If multiple codecs responded in the same time, there is no assurance as to which
response will be latched. Therefore, broadcast-type commands must not be issued
using the Immediate Command mechanism.
Bit Description
15:2 Reserved
1
Immediate Result Valid (IRV)—R/WC.
1 = Set to 1 by hardware when a new response is latched into the Immediate Response
register (HDBAR + 64). This is a status flag indicating that software may read the
response from the Immediate Response register.
Software must clear this bit by writing a 1 to it before issuing a new command so that
the software may determine when a new response has arrived.
0
Immediate Command Busy (ICB)—R/W. When this bit is read as 0, it indicates that
a new command may be issued using the Immediate Command mechanism. When this
bit transitions from a 0 to a 1 (using software writing a 1), the controller issues the
command currently stored in the Immediate Command register to the codec over the
link. When the corresponding response is latched into the Immediate Response register,
the controller hardware sets the IRV flag and clears the ICB bit back to 0.
NOTE: An Immediate Command must not be issued while the CORB/RIRB mechanism
is operating, otherwise the responses conflict. This must be enforced by
software.
Datasheet 747
Intel® High Definition Audio Controller Registers (D27:F0)
17.2.33 DPLBASE—DMA Position Lower Base Address Register
(Intel® High Definition Audio Controller—D27:F0)
Memory Address:HDBAR + 70h Attribute: R/W, RO
Default Value: 00000000h Size: 32 bits
17.2.34 DPUBASE—DMA Position Upper Base Address Register
(Intel® High Definition Audio Controller—D27:F0)
Memory Address:HDBAR + 74h Attribute: R/W
Default Value: 00000000h Size: 32 bits
Bit Description
31:7
DMA Position Lower Base Address—R/W. Lower 32 bits of the DMA Position Buffer
Base Address. This register field must not be written when any DMA engine is running
or the DMA transfer may be corrupted. This same address is used by the Flush Control
and must be programmed with a valid value before the Flush Control bit
(HDBAR+08h:bit 1) is set.
6:1 DMA Position Lower Base Unimplemented bits—RO. Hardwired to 0 to force the 128-
byte buffer alignment for cache line write optimizations.
0
DMA Position Buffer EnableR/W.
1 = Controller will write the DMA positions of each of the DMA engines to the buffer in
the main memory periodically (typically once per frame). Software can use this
value to know what data in memory is valid data.
Bit Description
31:0
DMA Position Upper Base Address—R/W. Upper 32 bits of the DMA Position Buffer
Base Address. This register field must not be written when any DMA engine is running
or the DMA transfer may be corrupted.
Intel® High Definition Audio Controller Registers (D27:F0)
748 Datasheet
17.2.35 SDCTL—Stream Descriptor Control Register
(Intel® High Definition Audio Controller—D27:F0)
Memory Address:Input Stream[0]: HDBAR + 80h Attribute: R/W, RO
Input Stream[1]: HDBAR + A0h
Input Stream[2]: HDBAR + C0h
Input Stream[3]: HDBAR + E0h
Output Stream[0]: HDBAR + 100h
Output Stream[1]: HDBAR + 120h
Output Stream[2]: HDBAR + 140h
Output Stream[3]: HDBAR + 160h
Default Value: 040000h Size: 24 bits
Bit Description
23:20
Stream Number—R/W. This value reflect the Tag associated with the data being
transferred on the link.
When data controlled by this descriptor is sent out over the link, it will have its stream
number encoded on the SYNC signal.
When an input stream is detected on any of the SDI signals that match this value, the
data samples are loaded into FIFO associated with this descriptor.
Note that while a single SDI input may contain data from more than one stream
number, two different SDI inputs may not be configured with the same stream number.
0000 = Reserved
0001 = Stream 1
........
1110 = Stream 14
1111 = Stream 15
19 Bidirectional Direction Control—RO. This bit is only meaningful for bidirectional
streams; therefore, this bit is hardwired to 0.
18 Traffic Priority—RO. Hardwired to 1 indicating that all streams will use VC1 if it is
enabled through the PCI Express* registers.
17:16 Stripe Control—RO. This bit is only meaningful for input streams; therefore, this bit is
hardwired to 0.
15:5 Reserved
4
Descriptor Error Interrupt Enable—R/W.
0 = Disable
1 = An interrupt is generated when the Descriptor Error Status bit is set.
3
FIFO Error Interrupt Enable—R/W.
This bit controls whether the occurrence of a FIFO error (overrun for input or underrun
for output) will cause an interrupt or not. If this bit is not set, bit 3in the Status register
will be set, but the interrupt will not occur. Either way, the samples will be dropped.
2
Interrupt on Completion Enable—R/W.
This bit controls whether or not an interrupt occurs when a buffer completes with the
IOC bit set in its descriptor. If this bit is not set, bit 2 in the Status register will be set,
but the interrupt will not occur.
Datasheet 749
Intel® High Definition Audio Controller Registers (D27:F0)
1
Stream Run (RUN)—R/W.
0 = DMA engine associated with this input stream will be disabled. The hardware will
report a 0 in this bit when the DMA engine is actually stopped. Software must read
a 0 from this bit before modifying related control registers or restarting the DMA
engine.
1 = DMA engine associated with this input stream will be enabled to transfer data from
the FIFO to the main memory. The SSYNC bit must also be cleared for the DMA
engine to run. For output streams, the cadence generator is reset whenever the
RUN bit is set.
0
Stream Reset (SRST)—R/W.
0 = Writing a 0 causes the corresponding stream to exit reset. When the stream
hardware is ready to begin operation, it will report a 0 in this bit. Software must
read a 0 from this bit before accessing any of the stream registers.
1 = Writing a 1 causes the corresponding stream to be reset. The Stream Descriptor
registers (except the SRST bit itself) and FIFOs for the corresponding stream are
reset. After the stream hardware has completed sequencing into the reset state, it
will report a 1 in this bit. Software must read a 1 from this bit to verify that the
stream is in reset. The RUN bit must be cleared before SRST is asserted.
Bit Description
Intel® High Definition Audio Controller Registers (D27:F0)
750 Datasheet
17.2.36 SDSTS—Stream Descriptor Status Register
(Intel® High Definition Audio Controller—D27:F0)
Memory Address:Input Stream[0]: HDBAR + 83h Attribute: R/WC, RO
Input Stream[1]: HDBAR + A3h
Input Stream[2]: HDBAR + C3h
Input Stream[3]: HDBAR + E3h
Output Stream[0]: HDBAR + 103h
Output Stream[1]: HDBAR + 123h
Output Stream[2]: HDBAR + 143h
Output Stream[3]: HDBAR + 163h
Default Value: 00h Size: 8 bits
Bit Description
7:6 Reserved
5
FIFO Ready (FIFORDY)—RO. For output streams, the controller hardware will set this
bit to 1 while the output DMA FIFO contains enough data to maintain the stream on the
link. This bit defaults to 0 on reset because the FIFO is cleared on a reset.
For input streams, the controller hardware will set this bit to 1 when a valid descriptor
is loaded and the engine is ready for the RUN bit to be set.
4
Descriptor Error—R/WC.
1 = A serious error occurred during the fetch of a descriptor. This could be a result of a
Master Abort, a parity or ECC error on the bus, or any other error which renders
the current Buffer Descriptor or Buffer Descriptor list useless. This error is treated
as a fatal stream error, as the stream cannot continue running. The RUN bit will be
cleared and the stream will stopped.
Software may attempt to restart the stream engine after addressing the cause of the
error and writing a 1 to this bit to clear it.
3
FIFO Error—R/WC.
1 = FIFO error occurred. This bit is set even if an interrupt is not enabled. The bit is
cleared by writing a 1 to it.
For an input stream, this indicates a FIFO overrun occurring while the RUN bit is set.
When this happens, the FIFO pointers do not increment and the incoming data is not
written into the FIFO, thereby being lost.
For an output stream, this indicates a FIFO underrun when there are still buffers to
send. The hardware should not transmit anything on the link for the associated stream
if there is not valid data to send.
2
Buffer Completion Interrupt Status—R/WC.
This bit is set to 1 by the hardware after the last sample of a buffer has been
processed, AND if the Interrupt on Completion bit is set in the command byte of the
buffer descriptor. It remains active until software clears it by writing a 1 to it.
1:0 Reserved
Datasheet 751
Intel® High Definition Audio Controller Registers (D27:F0)
17.2.37 SDLPIB—Stream Descriptor Link Position in Buffer
Register (Intel® High Definition Audio Controller—D27:F0)
Memory Address:Input Stream[0]: HDBAR + 84h Attribute: RO
Input Stream[1]: HDBAR + A4h
Input Stream[2]: HDBAR + C4h
Input Stream[3]: HDBAR + E4h
Output Stream[0]: HDBAR + 104h
Output Stream[1]: HDBAR + 124h
Output Stream[2]: HDBAR + 144h
Output Stream[3]: HDBAR + 164h
Default Value: 00000000h Size: 32 bits
17.2.38 SDCBL—Stream Descriptor Cyclic Buffer Length Register
(Intel® High Definition Audio Controller—D27:F0)
Memory Address:Input Stream[0]: HDBAR + 88h Attribute: R/W
Input Stream[1]: HDBAR + A8h
Input Stream[2]: HDBAR + C8h
Input Stream[3]: HDBAR + E8h
Output Stream[0]: HDBAR + 108h
Output Stream[1]: HDBAR + 128h
Output Stream[2]: HDBAR + 148h
Output Stream[3]: HDBAR + 168h
Default Value: 00000000h Size: 32 bits
Bit Description
31:0
Link Position in Buffer—RO. Indicates the number of bytes that have been received
off the link. This register will count from 0 to the value in the Cyclic Buffer Length
register and then wrap to 0.
Bit Description
31:0
Cyclic Buffer Length—R/W. Indicates the number of bytes in the complete cyclic
buffer. This register represents an integer number of samples. Link Position in Buffer
will be reset when it reaches this value.
Software may only write to this register after Global Reset, Controller Reset, or Stream
Reset has occurred. This value should be only modified when the RUN bit is 0. Once the
RUN bit has been set to enable the engine, software must not write to this register until
after the next reset is asserted, or transfer may be corrupted.
Intel® High Definition Audio Controller Registers (D27:F0)
752 Datasheet
17.2.39 SDLVI—Stream Descriptor Last Valid Index Register
(Intel® High Definition Audio Controller—D27:F0)
Memory Address:Input Stream[0]: HDBAR + 8Ch Attribute: R/W
Input Stream[1]: HDBAR + ACh
Input Stream[2]: HDBAR + CCh
Input Stream[3]: HDBAR + ECh
Output Stream[0]: HDBAR + 10Ch
Output Stream[1]: HDBAR + 12Ch
Output Stream[2]: HDBAR + 14Ch
Output Stream[3]: HDBAR + 16Ch
Default Value: 0000h Size: 16 bits
17.2.40 SDFIFOW—Stream Descriptor FIFO Watermark Register
(Intel® High Definition Audio Controller—D27:F0)
Memory Address:Input Stream[0]: HDBAR + 8Eh Attribute: R/W
Input Stream[1]: HDBAR + AEh
Input Stream[2]: HDBAR + CEh
Input Stream[3]: HDBAR + EEh
Output Stream[0]: HDBAR + 10Eh
Output Stream[1]: HDBAR + 12Eh
Output Stream[2]: HDBAR + 14Eh
Output Stream[3]: HDBAR + 16Eh
Default Value: 0004h Size: 16 bits
Bit Description
15:8 Reserved
7:0
Last Valid Index—R/W. The value written to this register indicates the index for the
last valid Buffer Descriptor in BDL. After the controller has processed this descriptor, it
will wrap back to the first descriptor in the list and continue processing.
This field must be at least 1; that is, there must be at least 2 valid entries in the buffer
descriptor list before DMA operations can begin.
This value should only modified when the RUN bit is 0.
Bit Description
15:3 Reserved
2:0
FIFO Watermark (FIFOW)—R/W. Indicates the minimum number of bytes
accumulated/free in the FIFO before the controller will start a fetch/eviction of data.
010 = 8B
011 = 16B
100 = 32B (Default)
101 = 64B
Others = Unsupported
NOTE: When the bit field is programmed to an unsupported size, the hardware sets
itself to the default value.
Software must read the bit field to test if the value is supported after setting the bit
field.
Datasheet 753
Intel® High Definition Audio Controller Registers (D27:F0)
17.2.41 SDFIFOS—Stream Descriptor FIFO Size Register
(Intel® High Definition Audio Controller—D27:F0)
Memory Address:Input Stream[0]: HDBAR + 90h Attribute: Input: RO
Input Stream[1]: HDBAR + B0h Output: R/W
Input Stream[2]: HDBAR + D0h
Input Stream[3]: HDBAR + F0h
Output Stream[0]: HDBAR + 110h
Output Stream[1]: HDBAR + 130h
Output Stream[2]: HDBAR + 150h
Output Stream[3]: HDBAR + 170h
Default Value: Input Stream: 0077h Size: 16 bits
Output Stream: See Description.
Bit Description
15:10 Reserved
9:0
FIFO Size—RO (Input stream), R/W (Output stream). Indicates the maximum number
of bytes that could be fetched by the controller at one time. This is the maximum
number of bytes that may have been DMA’d into memory but not yet transmitted on
the link, and is also the maximum possible value that the PICB count will increase by at
one time.
The value in this field is different for input and output streams. It is also dependent on
the Bits per Samples setting for the corresponding stream. Following are the values
read/written from/to this register for input and output streams, and for non-padded
and padded bit formats:
Output Stream R/W value:
NOTES:
1. All other values not listed are not supported.
2. When the output stream is programmed to an unsupported size, the hardware
sets itself to the default value (BFh).
3. Software must read the bit field to test if the value is supported after setting the
bit field.
Input Stream RO value:
NOTE: The default value is different for input and output streams, and reflects the
default state of the BITS fields (in Stream Descriptor Format registers) for the
corresponding stream.
Value Output Streams
0Fh = 16B 8, 16, 20, 24, or 32 bit Output Streams
1Fh = 32B 8, 16, 20, 24, or 32 bit Output Streams
3Fh = 64B 8, 16, 20, 24, or 32 bit Output Streams
7Fh = 128B 8, 16, 20, 24, or 32 bit Output Streams
BFh = 192B 8, 16, or 32 bit Output Streams (Default)
FFh = 256B 20 or 24 bit Output Streams (Default)
17Fh = 384B 8, 16, or 32 bit Output Streams
1FFh = 512B 20 or 24 bit Output Streams
Value Input Streams
77h = 120B 8, 16, 32 bit Input Streams
9Fh = 160B 20, 24 bit Input Streams
Intel® High Definition Audio Controller Registers (D27:F0)
754 Datasheet
17.2.42 SDFMT—Stream Descriptor Format Register
(Intel® High Definition Audio Controller—D27:F0)
Memory Address:Input Stream[0]: HDBAR + 92h Attribute: R/W
Input Stream[1]: HDBAR + B2h
Input Stream[2]: HDBAR + D2h
Input Stream[3]: HDBAR + F2h
Output Stream[0]: HDBAR + 112h
Output Stream[1]: HDBAR + 132h
Output Stream[2]: HDBAR + 152h
Output Stream[3]: HDBAR + 172h
Default Value: 0000h Size: 16 bits
Bit Description
15 Reserved
14
Sample Base Rate—R/W
0 = 48 kHz
1 = 44.1 kHz
13:11
Sample Base Rate MultipleR/W
000 = 48 kHz, 44.1 kHz or less
001 = x2 (96 kHz, 88.2 kHz, 32 kHz)
010 = x3 (144 kHz)
011 = x4 (192 kHz, 176.4 kHz)
Others = Reserved.
10:8
Sample Base Rate Devisor—R/W.
000 = Divide by 1(48 kHz, 44.1 kHz)
001 = Divide by 2 (24 kHz, 22.05 kHz)
010 = Divide by 3 (16 kHz, 32 kHz)
011 = Divide by 4 (11.025 kHz)
100 = Divide by 5 (9.6 kHz)
101 = Divide by 6 (8 kHz)
110 = Divide by 7
111 = Divide by 8 (6 kHz)
7 Reserved
6:4
Bits per Sample (BITS)—R/W.
000 = 8 bits. The data will be packed in memory in 8-bit containers on 16-bit
boundaries
001 = 16 bits. The data will be packed in memory in 16-bit containers on 16-bit
boundaries
010 = 20 bits. The data will be packed in memory in 32-bit containers on 32-bit
boundaries
011 = 24 bits. The data will be packed in memory in 32-bit containers on 32-bit
boundaries
100 = 32 bits. The data will be packed in memory in 32-bit containers on 32-bit
boundaries
Others = Reserved.
3:0
Number of Channels (CHAN)—R/W. Indicates number of channels in each frame of the
stream.
0000 =1
0001 =2
........
1111 =16
Datasheet 755
Intel® High Definition Audio Controller Registers (D27:F0)
17.2.43 SDBDPL—Stream Descriptor Buffer Descriptor List
Pointer Lower Base Address Register
(Intel® High Definition Audio Controller—D27:F0)
Memory Address:Input Stream[0]: HDBAR + 98h Attribute: R/W,RO
Input Stream[1]: HDBAR + B8h
Input Stream[2]: HDBAR + D8h
Input Stream[3]: HDBAR + F8h
Output Stream[0]: HDBAR + 118h
Output Stream[1]: HDBAR + 138h
Output Stream[2]: HDBAR + 158h
Output Stream[3]: HDBAR + 178h
Default Value: 00000000h Size: 32 bits
17.2.44 SDBDPU—Stream Descriptor Buffer Descriptor List
Pointer Upper Base Address Register
(Intel® High Definition Audio Controller—D27:F0)
Memory Address:Input Stream[0]: HDBAR + 9Ch Attribute: R/W
Input Stream[1]: HDBAR + BCh
Input Stream[2]: HDBAR + DCh
Input Stream[3]: HDBAR + FCh
Output Stream[0]: HDBAR + 11Ch
Output Stream[1]: HDBAR + 13Ch
Output Stream[2]: HDBAR + 15Ch
Output Stream[3]: HDBAR + 17Ch
Default Value: 00000000h Size: 32 bits
§ §
Bit Description
31:7
Buffer Descriptor List Pointer Lower Base Address—R/W. Lower address of the
Buffer Descriptor List. This value should only be modified when the RUN bit is 0, or DMA
transfer may be corrupted.
6:0 Hardwired to 0 forcing alignment on 128-B boundaries.
Bit Description
31:0
Buffer Descriptor List Pointer Upper Base Address—R/W. Upper 32-bit address of
the Buffer Descriptor List. This value should only be modified when the RUN bit is 0, or
DMA transfer may be corrupted.
Intel® High Definition Audio Controller Registers (D27:F0)
756 Datasheet
Datasheet 757
SMBus Controller Registers (D31:F3)
18 SMBus Controller Registers
(D31:F3)
18.1 PCI Configuration Registers (SMBus—D31:F3)
NOTE: Registers that are not shown should be treated as Reserved (See Section 9.2 for details).
18.1.1 VID—Vendor Identification Register (SMBus—D31:F3)
Address: 00h01h Attribute: RO
Default Value: 8086h Size: 16 bits
Table 18-1. SMBus Controller PCI Register Address Map (SMBus—D31:F3)
Offset Mnemonic Register Name Default Type
00h–01h VID Vendor Identification 8086 RO
02h–03h DID Device Identification See register
description RO
04h–05h PCICMD PCI Command 0000h R/W, RO
06h–07h PCISTS PCI Status 0280h RO
08h RID Revision Identification See register
description RO
09h PI Programming Interface 00h RO
0Ah SCC Sub Class Code 05h RO
0Bh BCC Base Class Code 0Ch RO
10h SMBMBAR0 Memory Base Address Register 0
(Bit 31:0) 00000004h R/W
14h SMBMBAR1 Memory Based Address Register 1
(Bit 63:32) 00000000h R/W
20h–23h SMB_BASE SMBus Base Address 00000001h R/W, RO
2Ch–2Dh SVID Subsystem Vendor Identification 0000h RO
2Eh–2Fh SID Subsystem Identification 0000h R/WO
3Ch INT_LN Interrupt Line 00h R/W
3Dh INT_PN Interrupt Pin See register
description RO
40h HOSTC Host Configuration 00h R/W
Bit Description
15:0 Vendor IDRO. This is a 16-bit value assigned to Intel
SMBus Controller Registers (D31:F3)
758 Datasheet
18.1.2 DID—Device Identification Register (SMBus—D31:F3)
Address: 02h03h Attribute: RO
Default Value: See bit description Size: 16 bits
18.1.3 PCICMD—PCI Command Register (SMBus—D31:F3)
Address: 04h05h Attributes: RO, R/W
Default Value: 0000h Size: 16 bits
Bit Description
15:0
Device ID—RO. This is a 16-bit value assigned to the PCH SMBus controller. See the
Intel® 5 Series Chipset and Intel® 3400 Series Chipset Specification Update for the
value of the Device ID Register.
Bit Description
15:11 Reserved
10
Interrupt Disable—R/W.
0 = Enable
1 = Disables SMBus to assert its PIRQB# signal.
9 Fast Back to Back Enable (FBE)—RO. Hardwired to 0.
8
SERR# Enable (SERR_EN)—R/W.
0 = Enables SERR# generation.
1 = Disables SERR# generation.
7 Wait Cycle Control (WCC)—RO. Hardwired to 0.
6
Parity Error Response (PER)—R/W.
0 = Disable
1 = Sets Detected Parity Error bit (D31:F3:06, bit 15) when a parity error is detected.
5 VGA Palette Snoop (VPS)—RO. Hardwired to 0.
4 Postable Memory Write Enable (PMWE)—RO. Hardwired to 0.
3 Special Cycle Enable (SCE)—RO. Hardwired to 0.
2 Bus Master Enable (BME)—RO. Hardwired to 0.
1
Memory Space Enable (MSE)—R/W.
0 = Disables memory mapped config space.
1 = Enables memory mapped config space.
0
I/O Space Enable (IOSE)—R/W.
0 = Disable
1 = Enables access to the SMBus I/O space registers as defined by the Base Address
Register.
Datasheet 759
SMBus Controller Registers (D31:F3)
18.1.4 PCISTS—PCI Status Register (SMBus—D31:F3)
Address: 06h07h Attributes: RO
Default Value: 0280h Size: 16 bits
Note: For the writable bits, software must write a 1 to clear bits that are set. Writing a 0 to
the bit has no effect.
18.1.5 RID—Revision Identification Register (SMBus—D31:F3)
Offset Address: 08h Attribute: RO
Default Value: See bit description Size: 8 bits
Bit Description
15
Detected Parity Error (DPE)—R/WC.
0 = No parity error detected.
1 = Parity error detected.
14
Signaled System Error (SSE)—R/WC.
0 = No system error detected.
1 = System error detected.
13 Received Master Abort (RMA)—RO. Hardwired to 0.
12 Received Target Abort (RTA)—RO. Hardwired to 0.
11 Signaled Target Abort (STA)—RO. Hardwired to 0.
10:9
DEVSEL# Timing Status (DEVT)—RO. This 2-bit field defines the timing for DEVSEL#
assertion for positive decode.
01 = Medium timing.
8 Data Parity Error Detected (DPED)—RO. Hardwired to 0.
7 Fast Back to Back Capable (FB2BC)—RO. Hardwired to 1.
6 User Definable Features (UDF)—RO. Hardwired to 0.
5 66 MHz Capable (66MHZ_CAP)—RO. Hardwired to 0.
4Capabilities List (CAP_LIST)RO. Hardwired to 0 because there are no capability list
structures in this function
3Interrupt Status (INTS)—RO. This bit indicates that an interrupt is pending. It is
independent from the state of the Interrupt Enable bit in the PCI Command register.
2:0 Reserved
Bit Description
7:0 Revision ID—RO. See the Intel® 5 Series Chipset and Intel® 3400 Series Chipset
Specification Update for the value of the Revision ID Register.
SMBus Controller Registers (D31:F3)
760 Datasheet
18.1.6 PI—Programming Interface Register (SMBus—D31:F3)
Offset Address: 09h Attribute: RO
Default Value: 00h Size: 8 bits
18.1.7 SCC—Sub Class Code Register (SMBus—D31:F3)
Address Offset: 0Ah Attributes: RO
Default Value: 05h Size: 8 bits
18.1.8 BCC—Base Class Code Register (SMBus—D31:F3)
Address Offset: 0Bh Attributes: RO
Default Value: 0Ch Size: 8 bits
18.1.9 SMBMBAR0—D31_F3_SMBus Memory Base Address 0
Register (SMBus—D31:F3)
Address Offset: 10–13h Attributes: R/W, RO
Default Value: 00000004h Size: 32 bits
Bit Description
7:0 Reserved
Bit Description
7:0 Sub Class Code (SCC)—RO.
05h = SMBus serial controller
Bit Description
7:0 Base Class Code (BCC)—RO.
0Ch = Serial controller.
Bit Description
31:8 Base Address—R/W. Provides the 32 byte system memory base address for the PCH
SMB logic.
7:4 Reserved
3 Prefetchable (PREF)—RO. Hardwired to 0. Indicates that SMBMBAR is not pre-fetchable.
2:1 Address Range (ADDRNG)—RO. Indicates that this SMBMBAR can be located
anywhere in 64 bit address space. Hardwired to 10b.
0Memory Space Indicator—RO. This read-only bit always is 0, indicating that the SMB
logic is Memory mapped.
Datasheet 761
SMBus Controller Registers (D31:F3)
18.1.10 SMBMBAR1—D31_F3_SMBus Memory Base Address 1
Register (SMBus—D31:F3)
Address Offset: 14h–17h Attributes: R/W
Default Value: 00000000h Size: 32 bits
18.1.11 SMB_BASE—SMBus Base Address Register
(SMBus—D31:F3)
Address Offset: 2023h Attribute: R/W, RO
Default Value: 00000001h Size: 32-bits
18.1.12 SVID—Subsystem Vendor Identification Register
(SMBus—D31:F2/F4)
Address Offset: 2Ch2Dh Attribute: RO
Default Value: 0000h Size: 16 bits
Lockable: No Power Well: Core
Bit Description
31:0 Base Address—R/W. Provides bits 63–32 system memory base address for the PCH
SMB logic.
Bit Description
31:16 Reserved—RO
15:5 Base Address—R/W. This field provides the 32-byte system I/O base address for the
PCH’s SMB logic.
4:1 Reserved—RO
0 IO Space Indicator—RO. Hardwired to 1 indicating that the SMB logic is I/O mapped.
Bit Description
15:0
Subsystem Vendor ID (SVID)RO. The SVID register, in combination with the
Subsystem ID (SID) register, enables the operating system (OS) to distinguish
subsystems from each other. The value returned by reads to this register is the same as
that which was written by BIOS into the IDE SVID register.
NOTE: Software can write to this register only once per core well reset. Writes should
be done as a single 16-bit cycle.
SMBus Controller Registers (D31:F3)
762 Datasheet
18.1.13 SID—Subsystem Identification Register
(SMBus—D31:F2/F4)
Address Offset: 2Eh2Fh Attribute: R/WO
Default Value: 0000h Size: 16 bits
Lockable: No Power Well: Core
18.1.14 INT_LN—Interrupt Line Register (SMBus—D31:F3)
Address Offset: 3Ch Attributes: R/W
Default Value: 00h Size: 8 bits
18.1.15 INT_PN—Interrupt Pin Register (SMBus—D31:F3)
Address Offset: 3Dh Attributes: RO
Default Value: See description Size: 8 bits
Bit Description
15:0
Subsystem ID (SID)—R/WO. The SID register, in combination with the SVID register,
enables the operating system (OS) to distinguish subsystems from each other. The
value returned by reads to this register is the same as that which was written by BIOS
into the IDE SID register.
NOTE: Software can write to this register only once per core well reset. Writes should
be done as a single 16-bit cycle.
Bit Description
7:0
Interrupt Line (INT_LN)—R/W. This data is not used by the PCH. It is to
communicate to software the interrupt line that the interrupt pin is connected to
PIRQB#.
Bit Description
7:0 Interrupt PIN (INT_PN)—RO. This reflects the value of D31IP.SMIP in chipset
configuration space.
Datasheet 763
SMBus Controller Registers (D31:F3)
18.1.16 HOSTC—Host Configuration Register (SMBus—D31:F3)
Address Offset: 40h Attribute: R/W
Default Value: 00h Size: 8 bits
Bit Description
7:4 Reserved
3
SSRESET - Soft SMBus Reset—R/W.
0 = The HW will reset this bit to 0 when SMBus reset operation is completed.
1 = The SMBus state machine and logic in the PCH is reset.
2
I2C_EN—R/W.
0 = SMBus behavior.
1 = The PCH is enabled to communicate with I2C devices. This will change the
formatting of some commands.
1
SMB_SMI_EN—R/W.
0 = SMBus interrupts will not generate an SMI#.
1 = Any source of an SMB interrupt will instead be routed to generate an SMI#. See
Section 5.20.4 (Interrupts / SMI#).
This bit needs to be set for SMBALERT# to be enabled.
0
SMBus Host Enable (HST_EN)—R/W.
0 = Disable the SMBus Host controller.
1 = Enable. The SMB Host controller interface is enabled to execute commands. The
INTREN bit (offset SM_BASE + 02h, bit 0) needs to be enabled for the SMB Host
controller to interrupt or SMI#. Note that the SMB Host controller will not respond
to any new requests until all interrupt requests have been cleared.
SMBus Controller Registers (D31:F3)
764 Datasheet
18.2 SMBus I/O and Memory Mapped I/O Registers
The SMBus registers (see Table 18-2) can be accessed through I/O BAR or Memory BAR
registers in PCI configuration space. The offsets are the same for both I/O and Memory
Mapped I/O registers.
Table 18-2. SMBus I/O and Memory Mapped I/O Register Address Map
SMB_BASE
+ Offset Mnemonic Register Name Default Type
00h HST_STS Host Status 00h R/WC, RO
02h HST_CNT Host Control 00h R/W, WO
03h HST_CMD Host Command 00h R/W
04h XMIT_SLVA Transmit Slave Address 00h R/W
05h HST_D0 Host Data 0 00h R/W
06h HST_D1 Host Data 1 00h R/W
07h HOST_BLOCK_DB Host Block Data Byte 00h R/W
08h PEC Packet Error Check 00h R/W
09h RCV_SLVA Receive Slave Address 44h R/W
0Ah–0Bh SLV_DATA Receive Slave Data 0000h RO
0Ch AUX_STS Auxiliary Status 00h R/WC, RO
0Dh AUX_CTL Auxiliary Control 00h R/W
0Eh SMLINK_PIN_CTL SMLink Pin Control (TCO
Compatible Mode)
See register
description R/W, RO
0Fh SMBus_PIN_CTL SMBus Pin Control See register
description R/W, RO
10h SLV_STS Slave Status 00h R/WC
11h SLV_CMD Slave Command 00h R/W
14h NOTIFY_DADDR Notify Device Address 00h RO
16h NOTIFY_DLOW Notify Data Low Byte 00h RO
17h NOTIFY_DHIGH Notify Data High Byte 00h RO
Datasheet 765
SMBus Controller Registers (D31:F3)
18.2.1 HST_STS—Host Status Register (SMBus—D31:F3)
Register Offset: SM_BASE + 00h Attribute: R/WC, RO
Default Value: 00h Size: 8-bits
All status bits are set by hardware and cleared by the software writing a one to the
particular bit position. Writing a 0 to any bit position has no effect.
Bit Description
7
Byte Done Status (DS)—R/WC.
0 = Software can clear this by writing a 1 to it.
1 = Host controller received a byte (for Block Read commands) or if it has completed
transmission of a byte (for Block Write commands) when the 32-byte buffer is not
being used. Note that this bit will be set, even on the last byte of the transfer. This
bit is not set when transmission is due to the LAN interface heartbeat.
This bit has no meaning for block transfers when the 32-byte buffer is enabled.
NOTE: When the last byte of a block message is received, the host controller will set
this bit. However, it will not immediately set the INTR bit (bit 1 in this register).
When the interrupt handler clears the DS bit, the message is considered
complete, and the host controller will then set the INTR bit (and generate
another interrupt). Thus, for a block message of n bytes, the PCH will generate
n+1 interrupts. The interrupt handler needs to be implemented to handle these
cases. When not using the 32 Byte Buffer, hardware will drive the SMBCLK
signal low when the DS bit is set until SW clears the bit. This includes the last
byte of a transfer. Software must clear the DS bit before it can clear the BUSY
bit.
6
INUSE_STS—R/W. This bit is used as semaphore among various independent software
threads that may need to use the PCH’s SMBus logic, and has no other effect on
hardware.
0 = After a full PCI reset, a read to this bit returns a 0.
1 = After the first read, subsequent reads will return a 1. A write of a 1 to this bit will
reset the next read value to 0. Writing a 0 to this bit has no effect. Software can
poll this bit until it reads a 0, and will then own the usage of the host controller.
5
SMBALERT_STS—R/WC.
0 = Interrupt or SMI# was not generated by SMBALERT#. Software clears this bit by
writing a 1 to it.
1 = The source of the interrupt or SMI# was the SMBALERT# signal. This bit is only
cleared by software writing a 1 to the bit position or by RSMRST# going low.
If the signal is programmed as a GPIO, then this bit will never be set.
4
FAILED—R/WC.
0 = Software clears this bit by writing a 1 to it.
1 = The source of the interrupt or SMI# was a failed bus transaction. This bit is set in
response to the KILL bit being set to terminate the host transaction.
3
BUS_ERR—R/WC.
0 = Software clears this bit by writing a 1 to it.
1 = The source of the interrupt of SMI# was a transaction collision.
2
DEV_ERR—R/WC.
0 = Software clears this bit by writing a 1 to it. The PCH will then de-assert the
interrupt or SMI#.
1 = The source of the interrupt or SMI# was due to one of the following:
Invalid Command Field,
Unclaimed Cycle (host initiated),
Host Device Time-out Error.
SMBus Controller Registers (D31:F3)
766 Datasheet
18.2.2 HST_CNT—Host Control Register (SMBus—D31:F3)
Register Offset: SM_BASE + 02h Attribute: R/W, WO
Default Value: 00h Size: 8-bits
Note: A read to this register will clear the byte pointer of the 32-byte buffer.
1
INTR—R/WC. This bit can only be set by termination of a command. INTR is not
dependent on the INTREN bit (offset SM_BASE + 02h, bit 0) of the Host controller
register (offset 02h). It is only dependent on the termination of the command. If the
INTREN bit is not set, then the INTR bit will be set, although the interrupt will not be
generated. Software can poll the INTR bit in this non-interrupt case.
0 = Software clears this bit by writing a 1 to it. The PCH then de-asserts the interrupt
or SMI#.
1 = The source of the interrupt or SMI# was the successful completion of its last
command.
0
HOST_BUSY—R/WC.
0 = Cleared by the PCH when the current transaction is completed.
1 = Indicates that the PCH is running a command from the host interface. No SMB
registers should be accessed while this bit is set, except the BLOCK DATA BYTE
Register. The BLOCK DATA BYTE Register can be accessed when this bit is set only
when the SMB_CMD bits in the Host Control Register are programmed for Block
command or I2C Read command. This is necessary to check the DONE_STS bit.
Bit Description
Bit Description
7
PEC_EN—R/W.
0 = SMBus host controller does not perform the transaction with the PEC phase
appended.
1 = Causes the host controller to perform the SMBus transaction with the Packet Error
Checking phase appended. For writes, the value of the PEC byte is transferred from
the PEC Register. For reads, the PEC byte is loaded in to the PEC Register. This bit
must be written prior to the write in which the START bit is set.
6
START—WO.
0 = This bit will always return 0 on reads. The HOST_BUSY bit in the Host Status
register (offset 00h) can be used to identify when the PCH has finished the
command.
1 = Writing a 1 to this bit initiates the command described in the SMB_CMD field. All
registers should be setup prior to writing a 1 to this bit position.
5
LAST_BYTE—WO. This bit is used for Block Read commands.
1 = Software sets this bit to indicate that the next byte will be the last byte to be
received for the block. This causes the PCH to send a NACK (instead of an ACK)
after receiving the last byte.
NOTE: Once the SECOND_TO_STS bit in TCO2_STS register (D31:F0, TCOBASE+6h,
bit 1) is set, the LAST_BYTE bit also gets set. While the SECOND_TO_STS bit is
set, the LAST_BYTE bit cannot be cleared. This prevents the PCH from running
some of the SMBus commands (Block Read/Write, I2C Read, Block I2C Write).
Datasheet 767
SMBus Controller Registers (D31:F3)
4:2
SMB_CMD—R/W. The bit encoding below indicates which command the PCH is to
perform. If enabled, the PCH will generate an interrupt or SMI# when the command
has completed If the value is for a non-supported or reserved command, the PCH will
set the device error (DEV_ERR) status bit (offset SM_BASE + 00h, bit 2) and generate
an interrupt when the START bit is set. The PCH will perform no command, and will not
operate until DEV_ERR is cleared.
000 = Quick: The slave address and read/write value (bit 0) are stored in the
transmit slave address register.
001 = Byte: This command uses the transmit slave address and command registers.
Bit 0 of the slave address register determines if this is a read or write
command.
010 = Byte Data: This command uses the transmit slave address, command, and
DATA0 registers. Bit 0 of the slave address register determines if this is a read
or write command. If it is a read, the DATA0 register will contain the read data.
011 = Word Data: This command uses the transmit slave address, command, DATA0
and DATA1 registers. Bit 0 of the slave address register determines if this is a
read or write command. If it is a read, after the command completes, the
DATA0 and DATA1 registers will contain the read data.
100 = Process Call: This command uses the transmit slave address, command,
DATA0 and DATA1 registers. Bit 0 of the slave address register determines if
this is a read or write command. After the command completes, the DATA0 and
DATA1 registers will contain the read data.
101 = Block: This command uses the transmit slave address, command, DATA0
registers, and the Block Data Byte register. For block write, the count is stored
in the DATA0 register and indicates how many bytes of data will be transferred.
For block reads, the count is received and stored in the DATA0 register. Bit 0 of
the slave address register selects if this is a read or write command. For writes,
data is retrieved from the first n (where n is equal to the specified count)
addresses of the SRAM array. For reads, the data is stored in the Block Data
Byte register.
110 = I2C Read: This command uses the transmit slave address, command, DATA0,
DATA1 registers, and the Block Data Byte register. The read data is stored in
the Block Data Byte register. The PCH continues reading data until the NAK is
received.
111 = Block Process: This command uses the transmit slave address, command,
DATA0 and the Block Data Byte register. For block write, the count is stored in
the DATA0 register and indicates how many bytes of data will be transferred.
For block read, the count is received and stored in the DATA0 register. Bit 0 of
the slave address register always indicate a write command. For writes, data is
retrieved from the first m (where m is equal to the specified count) addresses
of the SRAM array. For reads, the data is stored in the Block Data Byte register.
NOTE: E32B bit in the Auxiliary Control register must be set for this command to work.
1
KILL—R/W.
0 = Normal SMBus host controller functionality.
1 = Kills the current host transaction taking place, sets the FAILED status bit, and
asserts the interrupt (or SMI#). This bit, once set, must be cleared by software to
allow the SMBus host controller to function normally.
0
INTRENR/W.
0 = Disable.
1 = Enable the generation of an interrupt or SMI# upon the completion of the
command.
Bit Description
SMBus Controller Registers (D31:F3)
768 Datasheet
18.2.3 HST_CMD—Host Command Register (SMBus—D31:F3)
Register Offset: SM_BASE + 03h Attribute: R/W
Default Value: 00h Size: 8 bits
18.2.4 XMIT_SLVA—Transmit Slave Address Register
(SMBus—D31:F3)
Register Offset: SM_BASE + 04h Attribute: R/W
Default Value: 00h Size: 8 bits
This register is transmitted by the host controller in the slave address field of the
SMBus protocol.
18.2.5 HST_D0—Host Data 0 Register (SMBus—D31:F3)
Register Offset: SM_BASE + 05h Attribute: R/W
Default Value: 00h Size: 8 bits
18.2.6 HST_D1—Host Data 1 Register (SMBus—D31:F3)
Register Offset: SM_BASE + 06h Attribute: R/W
Default Value: 00h Size: 8 bits
Bit Description
7:0 This 8-bit field is transmitted by the host controller in the command field of the SMBus
protocol during the execution of any command.
Bit Description
7:1 Address—R/W. This field provides a 7-bit address of the targeted slave.
0
RW—R/W. Direction of the host transfer.
0 = Write
1 = Read
Bit Description
7:0
Data0/Count—R/W. This field contains the 8-bit data sent in the DATA0 field of the
SMBus protocol. For block write commands, this register reflects the number of bytes to
transfer. This register should be programmed to a value between 1 and 32 for block
counts. A count of 0 or a count above 32 will result in unpredictable behavior. The host
controller does not check or log invalid block counts.
Bit Description
7:0 Data1—R/W. This 8-bit register is transmitted in the DATA1 field of the SMBus protocol
during the execution of any command.
Datasheet 769
SMBus Controller Registers (D31:F3)
18.2.7 Host_BLOCK_DB—Host Block Data Byte Register
(SMBus—D31:F3)
Register Offset: SM_BASE + 07h Attribute: R/W
Default Value: 00h Size: 8 bits
18.2.8 PEC—Packet Error Check (PEC) Register
(SMBus—D31:F3)
Register Offset: SM_BASE + 08h Attribute: R/W
Default Value: 00h Size: 8 bits
Bit Description
7:0
Block Data (BDTA)—R/W. This is either a register, or a pointer into a 32-byte block
array, depending upon whether the E32B bit is set in the Auxiliary Control register.
When the E32B bit (offset SM_BASE + 0Dh, bit 1) is cleared, this is a register
containing a byte of data to be sent on a block write or read from on a block read.
When the E32B bit is set, reads and writes to this register are used to access the 32-
byte block data storage array. An internal index pointer is used to address the array,
which is reset to 0 by reading the HCTL register (offset 02h). The index pointer then
increments automatically upon each access to this register. The transfer of block data
into (read) or out of (write) this storage array during an SMBus transaction always
starts at index address 0.
When the E2B bit is set, for writes, software will write up to 32-bytes to this register as
part of the setup for the command. After the Host controller has sent the Address,
Command, and Byte Count fields, it will send the bytes in the SRAM pointed to by this
register.
When the E2B bit is cleared for writes, software will place a single byte in this register.
After the host controller has sent the address, command, and byte count fields, it will
send the byte in this register. If there is more data to send, software will write the next
series of bytes to the SRAM pointed to by this register and clear the DONE_STS bit. The
controller will then send the next byte. During the time between the last byte being
transmitted to the next byte being transmitted, the controller will insert wait-states on
the interface.
When the E2B bit is set for reads, after receiving the byte count into the Data0 register,
the first series of data bytes go into the SRAM pointed to by this register. If the byte
count has been exhausted or the 32-byte SRAM has been filled, the controller will
generate an SMI# or interrupt (depending on configuration) and set the DONE_STS bit.
Software will then read the data. During the time between when the last byte is read
from the SRAM to when the DONE_STS bit is cleared, the controller will insert wait-
states on the interface.
Bit Description
7:0
PEC_DATAR/W. This 8-bit register is written with the 8-bit CRC value that is used as
the SMBus PEC data prior to a write transaction. For read transactions, the PEC data is
loaded from the SMBus into this register and is then read by software. Software must
ensure that the INUSE_STS bit is properly maintained to avoid having this field over-
written by a write transaction following a read transaction.
SMBus Controller Registers (D31:F3)
770 Datasheet
18.2.9 RCV_SLVA—Receive Slave Address Register
(SMBus—D31:F3)
Register Offset: SM_BASE + 09h Attribute: R/W
Default Value: 44h Size: 8 bits
Lockable: No Power Well: Resume
18.2.10 SLV_DATA—Receive Slave Data Register (SMBus—D31:F3)
Register Offset: SM_BASE + 0Ah–0Bh Attribute: RO
Default Value: 0000h Size: 16 bits
Lockable: No Power Well: Resume
This register contains the 16-bit data value written by the external SMBus master. The
processor can then read the value from this register. This register is reset by RSMRST#,
but not PLTRST#
.
18.2.11 AUX_STS—Auxiliary Status Register (SMBus—D31:F3)
Register Offset: SM_BASE + 0Ch Attribute: R/WC, RO
Default Value: 00h Size: 8 bits
Lockable: No Power Well: Resume
.
Bit Description
7 Reserved
6:0
SLAVE_ADDR—R/W. This field is the slave address that the PCH decodes for read and
write cycles. the default is not 0, so the SMBus Slave Interface can respond even before
the processor comes up (or if the processor is dead). This register is cleared by
RSMRST#, but not by PLTRST#.
Bit Description
15:8 Data Message Byte 1 (DATA_MSG1)—RO. See Section 5.20.7 for a discussion of this
field.
7:0 Data Message Byte 0 (DATA_MSG0)—RO. See Section 5.20.7 for a discussion of
this field.
Bit Description
7:2 Reserved
1
SMBus TCO Mode (STCO)—RO. This bit reflects the strap setting of TCO compatible
mode versus Advanced TCO mode.
0 = The PCH is in the compatible TCO mode.
1 = The PCH is in the advanced TCO mode.
0
CRC Error (CRCE)—R/WC.
0 = Software clears this bit by writing a 1 to it.
1 = This bit is set if a received message contained a CRC error. When this bit is set, the
DERR bit of the host status register will also be set. This bit will be set by the
controller if a software abort occurs in the middle of the CRC portion of the cycle or
an abort happens after the PCH has received the final data bit transmitted by an
external slave.
Datasheet 771
SMBus Controller Registers (D31:F3)
18.2.12 AUX_CTL—Auxiliary Control Register (SMBus—D31:F3)
Register Offset: SM_BASE + 0Dh Attribute: R/W
Default Value: 00h Size: 8 bits
Lockable: No Power Well: Resume
.
18.2.13 SMLINK_PIN_CTL—SMLink Pin Control Register
(SMBus—D31:F3)
Register Offset: SM_BASE + 0Eh Attribute: R/W, RO
Default Value: See below Size: 8 bits
Note: This register is in the resume well and is reset by RSMRST#.
This register is only applicable in the TCO compatible mode.
Bit Description
7:2 Reserved
1
Enable 32-Byte Buffer (E32B)—R/W.
0 = Disable.
1 = Enable. When set, the Host Block Data register is a pointer into a 32-byte buffer, as
opposed to a single register. This enables the block commands to transfer or receive
up to 32-bytes before the PCH generates an interrupt.
0
Automatically Append CRC (AAC)—R/W.
0 = The PCH will Not automatically append the CRC.
1 = The PCH will automatically append the CRC. This bit must not be changed during
SMBus transactions or undetermined behavior will result. It should be programmed
only once during the lifetime of the function.
Bit Description
7:3 Reserved
2
SMLINK_CLK_CTL—R/W.
0 = The PCH will drive the SMLink0 pin low, independent of what the other SMLink logic
would otherwise indicate for the SMLink0 pin.
1 = The SMLink0 pin is not overdriven low. The other SMLink logic controls the state of
the pin. (Default)
1
SMLINK1_CUR_STS—RO. This read-only bit has a default value that is dependent on
an external signal level. This pin returns the value on the SMLink1 pin. This allows
software to read the current state of the pin.
0 = Low
1 = High
0
SMLINK0_CUR_STS—RO. This read-only bit has a default value that is dependent on
an external signal level. This pin returns the value on the SMLink0 pin. This allows
software to read the current state of the pin.
0 = Low
1 = High
SMBus Controller Registers (D31:F3)
772 Datasheet
18.2.14 SMBus_PIN_CTL—SMBus Pin Control Register
(SMBus—D31:F3)
Register Offset: SM_BASE + 0Fh Attribute: R/W, RO
Default Value: See below Size: 8 bits
Note: This register is in the resume well and is reset by RSMRST#.
18.2.15 SLV_STS—Slave Status Register (SMBus—D31:F3)
Register Offset: SM_BASE + 10h Attribute: R/WC
Default Value: 00h Size: 8 bits
Note: This register is in the resume well and is reset by RSMRST#.
All bits in this register are implemented in the 64 kHz clock domain. Therefore,
software must poll this register until a write takes effect before assuming that a write
has completed internally.
Bit Description
7:3 Reserved
2
SMBCLK_CTL—R/W.
1 = The SMBCLK pin is not overdriven low. The other SMBus logic controls the state of
the pin.
0 = The PCH drives the SMBCLK pin low, independent of what the other SMB logic
would otherwise indicate for the SMBCLK pin. (Default)
1
SMBDATA_CUR_STS—RO. This read-only bit has a default value that is dependent on
an external signal level. This pin returns the value on the SMBDATA pin. This allows
software to read the current state of the pin.
0 = Low
1 = High
0
SMBCLK_CUR_STS—RO. This read-only bit has a default value that is dependent on
an external signal level. This pin returns the value on the SMBCLK pin. This allows
software to read the current state of the pin.
0 = Low
1 = High
Bit Description
7:1 Reserved
0
HOST_NOTIFY_STSR/WC. The PCH sets this bit to a 1 when it has completely
received a successful Host Notify Command on the SMBus pins. Software reads this bit
to determine that the source of the interrupt or SMI# was the reception of the Host
Notify Command. Software clears this bit after reading any information needed from
the Notify address and data registers by writing a 1 to this bit. Note that the PCH will
allow the Notify Address and Data registers to be over-written once this bit has been
cleared. When this bit is 1, the PCH will NACK the first byte (host address) of any new
“Host Notify” commands on the SMBus pins. Writing a 0 to this bit has no effect.
Datasheet 773
SMBus Controller Registers (D31:F3)
18.2.16 SLV_CMD—Slave Command Register (SMBus—D31:F3)
Register Offset: SM_BASE + 11h Attribute: R/W
Default Value: 00h Size: 8 bits
Note: This register is in the resume well and is reset by RSMRST#.
18.2.17 NOTIFY_DADDR—Notify Device Address Register
(SMBus—D31:F3)
Register Offset: SM_BASE + 14h Attribute: RO
Default Value: 00h Size: 8 bits
Note: This register is in the resume well and is reset by RSMRST#.
Bit Description
7:2 Reserved
2
SMBALERT_DIS—R/W.
0 = Allows the generation of the interrupt or SMI#.
1 = Software sets this bit to block the generation of the interrupt or SMI# due to the
SMBALERT# source. This bit is logically inverted and ANDed with the
SMBALERT_STS bit (offset SM_BASE + 00h, bit 5). The resulting signal is
distributed to the SMI# and/or interrupt generation logic. This bit does not effect
the wake logic.
1
HOST_NOTIFY_WKEN—R/W. Software sets this bit to 1 to enable the reception of a
Host Notify command as a wake event. When enabled this event is “OR’d" in with the
other SMBus wake events and is reflected in the SMB_WAK_STS bit of the General
Purpose Event 0 Status register.
0 = Disable
1 = Enable
0
HOST_NOTIFY_INTREN—R/W. Software sets this bit to 1 to enable the generation of
interrupt or SMI# when HOST_NOTIFY_STS (offset SM_BASE + 10h, bit 0) is 1. This
enable does not affect the setting of the HOST_NOTIFY_STS bit. When the interrupt is
generated, either PIRQB# or SMI# is generated, depending on the value of the
SMB_SMI_EN bit (D31:F3:40h, bit 1). If the HOST_NOTIFY_STS bit is set when this bit
is written to a 1, then the interrupt (or SMI#) will be generated. The interrupt (or
SMI#) is logically generated by AND’ing the STS and INTREN bits.
0 = Disable
1 = Enable
Bit Description
7:1
DEVICE_ADDRESS—RO. This field contains the 7-bit device address received during
the Host Notify protocol of the SMBus 2.0 Specification. Software should only consider
this field valid when the HOST_NOTIFY_STS bit (D31:F3:SM_BASE +10, bit 0) is set to
1.
0 Reserved
SMBus Controller Registers (D31:F3)
774 Datasheet
18.2.18 NOTIFY_DLOW—Notify Data Low Byte Register
(SMBus—D31:F3)
Register Offset: SM_BASE + 16h Attribute: RO
Default Value: 00h Size: 8 bits
Note: This register is in the resume well and is reset by RSMRST#.
18.2.19 NOTIFY_DHIGH—Notify Data High Byte Register
(SMBus—D31:F3)
Register Offset: SM_BASE + 17h Attribute: RO
Default Value: 00h Size: 8 bits
Note: This register is in the resume well and is reset by RSMRST#.
§ §
Bit Description
7:0
DATA_LOW_BYTE—RO. This field contains the first (low) byte of data received during
the Host Notify protocol of the SMBus 2.0 specification. Software should only consider
this field valid when the HOST_NOTIFY_STS bit (D31:F3:SM_BASE +10, bit 0) is set to
1.
Bit Description
7:0
DATA_HIGH_BYTE—RO. This field contains the second (high) byte of data received
during the Host Notify protocol of the SMBus 2.0 specification. Software should only
consider this field valid when the HOST_NOTIFY_STS bit (D31:F3:SM_BASE +10, bit 0)
is set to 1.
Datasheet 775
PCI Express* Configuration Registers
19 PCI Express* Configuration
Registers
19.1 PCI Express* Configuration Registers
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7)
Note: Register address locations that are not shown in Ta b l e 19-1, should be treated as
Reserved.
Note: This section assumes the default PCI Express Function Number-to-Root Port mapping is
used. Function numbers for a given root port are assignable through the “Root Port
Function Number and Hide for PCI Express Root Ports” registers (RCBA+0404h).
/
Table 19-1. PCI Express* Configuration Registers Address Map
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7/) (Sheet 1 of 3)
Offset Mnemonic Register Name Function 0–5
Default Type
00h–01h VID Vendor Identification 8086h RO
02h–03h DID Device Identification See register
description RO
04h–05h PCICMD PCI Command 0000h R/W, RO
06h–07h PCISTS PCI Status 0010h R/WC, RO
08h RID Revision Identification See register
description RO
09h PI Programming Interface 00h RO
0Ah SCC Sub Class Code 04h RO
0Bh BCC Base Class Code 06h RO
0Ch CLS Cache Line Size 00h R/W
0Dh PLT Primary Latency Timer 00h RO
0Eh HEADTYP Header Type 81h RO
18h–1Ah BNUM Bus Number 000000h R/W
1Bh SLT Secondary Latency Timer 00h RO
1Ch–1Dh IOBL I/O Base and Limit 0000h R/W, RO
1Eh–1Fh SSTS Secondary Status Register 0000h R/WC
20h–23h MBL Memory Base and Limit 00000000h R/W
24h–27h PMBL Prefetchable Memory Base and Limit 00010001h R/W, RO
28h–2Bh PMBU32 Prefetchable Memory Base Upper 32
Bits 00000000h R/W
2Ch–2Fh PMLU32 Prefetchable Memory Limit Upper 32
Bits 00000000h R/W
34h CAPP Capabilities List Pointer 40h RO
3Ch–3Dh INTR Interrupt Information See bit
description R/W, RO
3Eh–3Fh BCTRL Bridge Control Register 0000h R/W
PCI Express* Configuration Registers
776 Datasheet
40h–41h CLIST Capabilities List 8010 RO
42h–43h XCAP PCI Express* Capabilities 0041 R/WO, RO
44h–47h DCAP Device Capabilities 00000FE0h RO
48h–49h DCTL Device Control 0000h R/W, RO
4Ah–4Bh DSTS Device Status 0010h R/WC, RO
4Ch–4Fh LCAP Link Capabilities See bit
description
R/W, RO,
R/WO
50h–51h LCTL Link Control 0000h R/W, WO,
RO
52h–53h LSTS Link Status See bit
description RO
54h–57h SLCAP Slot Capabilities Register 00000060h R/WO, RO
58h–59h SLCTL Slot Control 0000h R/W, RO
5Ah–5Bh SLSTS Slot Status 0000h R/WC, RO
5Ch–5Dh RCTL Root Control 0000h R/W
60h–63h RSTS Root Status 00000000h R/WC, RO
64h–67h DCAP2 Device Capabilities 2 Register 00000016h RO
68h–69h DCTL2 Device Control 2 Register 0000h R/W, RO
70h–71h LCTL2 Link Control 2 Register 0001h RO
80h–81h MID Message Signaled Interrupt Identifiers 9005h RO
82h–83h MC Message Signaled Interrupt Message
Control 0000h R/W, RO
84h–87h MA Message Signaled Interrupt Message
Address 00000000h R/W
88h–89h MD Message Signaled Interrupt Message
Data 0000h R/W
90h–91h SVCAP Subsystem Vendor Capability A00Dh RO
94h–97h SVID Subsystem Vendor Identification 00000000h R/WO
A0h–A1h PMCAP Power Management Capability 0001h RO
A2h–A3h PMC PCI Power Management Capability C802h RO
A4–A7h PMCS PCI Power Management Control and
Status 00000000h R/W, RO
D4–D7h MPC2 Miscellaneous Port Configuration 2 00000000h R/W, RO
D8–DBh MPC Miscellaneous Port Configuration 08110000h R/W
DC–DFh SMSCS SMI/SCI Status Register 00000000h R/WC
E1h RPDCGEN Rort Port Dynamic Clock Gating Enable 00h R/W
E8–EBh PECR1 PCI Express Configuration Register 1 00000020h R/W
11Ch–143h Reserved
104h–107h UES Uncorrectable Error Status See bit
description R/WC, RO
108h–10Bh UEM Uncorrectable Error Mask 00000000h R/WO, RO
Table 19-1. PCI Express* Configuration Registers Address Map
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7/) (Sheet 2 of 3)
Offset Mnemonic Register Name Function 0–5
Default Type
Datasheet 777
PCI Express* Configuration Registers
19.1.1 VID—Vendor Identification Register
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7/F6/F7)
Address Offset: 00h01h Attribute: RO
Default Value: 8086h Size: 16 bits
19.1.2 DID—Device Identification Register
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7/F6/F7)
Address Offset: 02h–03h Attribute: RO
Default Value: Port 1= Bit Description Size: 16 bits
Port 2= Bit Description
Port 3= Bit Description
Port 4= Bit Description
Port 5= Bit Description
Port 6= Bit Description
Port 7= Bit Description
Port 8= Bit Description
10Ch–10Fh UEV Uncorrectable Error Severity 00060011h RO
110h–113h CES Correctable Error Status 00000000h R/WC
114h–117h CEM Correctable Error Mask 00000000h R/WO
118h–11Bh AECC Advanced Error Capabilities and
Control 00000000h RO
130h–133h RES Root Error Status 00000000h R/WC, RO
180h–183h RCTCL Root Complex Topology Capability List 00010005h RO
184h–187h ESD Element Self Description See bit
description RO
190h–193h ULD Upstream Link Description 00000001h RO
198h–19Fh ULBA Upstream Link Base Address See bit
description RO
300–303h PECR2 PCI Express Configuration Register 2 60005007h R/W
318h PEETM PCI Express Extended Test Mode
Register
See bit
description RO
324h–327h PEC1 PCI Express Configuration Register 1 00000000h RO, R/W
Table 19-1. PCI Express* Configuration Registers Address Map
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7/) (Sheet 3 of 3)
Offset Mnemonic Register Name Function 0–5
Default Type
Bit Description
15:0 Vendor ID—RO. This is a 16-bit value assigned to Intel. Intel VID = 8086h
Bit Description
15:0
Device ID—RO. This is a 16-bit value assigned to the PCH’s PCI Express controller. See
the Intel® 5 Series Chipset and Intel® 3400 Series Chipset Specification Update for the
value of the Device ID Register
PCI Express* Configuration Registers
778 Datasheet
19.1.3 PCICMD—PCI Command Register
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7/F6/F7)
Address Offset: 04h–05h Attribute: R/W, RO
Default Value: 0000h Size: 16 bits
Bit Description
15:11 Reserved
10
Interrupt Disable—R/W. This disables pin-based INTx# interrupts on enabled Hot-
Plug and power management events. This bit has no effect on MSI operation.
0 = Internal INTx# messages are generated if there is an interrupt for Hot-Plug or
power management and MSI is not enabled.
1 = Internal INTx# messages will not be generated.
This bit does not affect interrupt forwarding from devices connected to the root port.
Assert_INTx and Deassert_INTx messages will still be forwarded to the internal
interrupt controllers if this bit is set.
9 Fast Back to Back Enable (FBE)—Reserved per the PCI Express* Base Specification.
8
SERR# Enable (SEE)—R/W.
0 = Disable.
1 = Enables the root port to generate an SERR# message when PSTS.SSE is set.
7 Wait Cycle Control (WCC)—Reserved per the PCI Express Base Specification.
6
Parity Error Response (PER)—R/W.
0 = Disable.
1 = Indicates that the device is capable of reporting parity errors as a master on the
backbone.
5 VGA Palette Snoop (VPS)—Reserved per the PCI Express* Base Specification.
4Postable Memory Write Enable (PMWE)—Reserved per the PCI Express* Base
Specification.
3 Special Cycle Enable (SCE)—Reserved per the PCI Express* Base Specification.
2
Bus Master Enable (BME)—R/W.
0 = Disable. All cycles from the device are master aborted
1 = Enable. Allows the root port to forward cycles onto the backbone from a PCI
Express* device.
1
Memory Space Enable (MSE)—R/W.
0 = Disable. Memory cycles within the range specified by the memory base and limit
registers are master aborted on the backbone.
1 = Enable. Allows memory cycles within the range specified by the memory base and
limit registers can be forwarded to the PCI Express device.
0
I/O Space Enable (IOSE)—R/W. This bit controls access to the I/O space registers.
0 = Disable. I/O cycles within the range specified by the I/O base and limit registers
are master aborted on the backbone.
1 = Enable. Allows I/O cycles within the range specified by the I/O base and limit
registers can be forwarded to the PCI Express device.
Datasheet 779
PCI Express* Configuration Registers
19.1.4 PCISTS—PCI Status Register
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7/F6/F7)
Address Offset: 06h07h Attribute: R/WC, RO
Default Value: 0010h Size: 16 bits
Bit Description
15
Detected Parity Error (DPE)—R/WC.
0 = No parity error detected.
1 = Set when the root port receives a command or data from the backbone with a
parity error. This is set even if PCIMD.PER (D28:F0/F1/F2/F3:04, bit 6) is not set.
14
Signaled System Error (SSE)—R/WC.
0 = No system error signaled.
1 = Set when the root port signals a system error to the internal SERR# logic.
13
Received Master Abort (RMA)—R/WC.
0 = Root port has not received a completion with unsupported request status from the
backbone.
1 = Set when the root port receives a completion with unsupported request status from
the backbone.
12
Received Target Abort (RTA)—R/WC.
0 = Root port has not received a completion with completer abort from the backbone.
1 = Set when the root port receives a completion with completer abort from the
backbone.
11
Signaled Target Abort (STA)—R/WC.
0 = No target abort received.
1 = Set whenever the root port forwards a target abort received from the downstream
device onto the backbone.
10:9 DEVSEL# Timing Status (DEV_STS)—Reserved per the PCI Express* Base
Specification.
8
Master Data Parity Error Detected (DPED)—R/WC.
0 = No data parity error received.
1 = Set when the root port receives a completion with a data parity error on the
backbone and PCIMD.PER (D28:F0/F1/F2/F3:04, bit 6) is set.
7 Fast Back to Back Capable (FB2BC)—Reserved per the PCI Express* Base Specification.
6 Reserved
5 66 MHz Capable—Reserved per the PCI Express* Base Specification.
4Capabilities List—RO. Hardwired to 1. Indicates the presence of a capabilities list.
3
Interrupt Status—RO. Indicates status of Hot-Plug and power management interrupts
on the root port that result in INTx# message generation.
0 = Interrupt is de-asserted.
1 = Interrupt is asserted.
This bit is not set if MSI is enabled. If MSI is not enabled, this bit is set regardless of the
state of PCICMD.Interrupt Disable bit (D28:F0/F1/F2/F3/F4/F5/F6/F7/F6/F7:04h:bit
10).
2:0 Reserved
PCI Express* Configuration Registers
780 Datasheet
19.1.5 RID—Revision Identification Register
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7/F6/F7)
Offset Address: 08h Attribute: RO
Default Value: See bit description Size: 8 bits
19.1.6 PI—Programming Interface Register
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7/F6/F7)
Address Offset: 09h Attribute: RO
Default Value: 00h Size: 8 bits
19.1.7 SCC—Sub Class Code Register
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7/F6/F7)
Address Offset: 0Ah Attribute: RO
Default Value: 04h Size: 8 bits
19.1.8 BCC—Base Class Code Register
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7/F6/F7)
Address Offset: 0Bh Attribute: RO
Default Value: 06h Size: 8 bits
Bit Description
7:0 Revision ID—RO. See the Intel® 5 Series Chipset and Intel® 3400 Series Chipset
Specification Update for the value of the Revision ID Register
Bit Description
7:0 Programming Interface—RO.
00h = No specific register level programming interface defined.
Bit Description
7:0
Sub Class Code (SCC)—RO. This field is determined by bit 2 of the MPC register
(D28:F0-5:Offset D8h, bit 2).
04h = PCI-to-PCI bridge.
00h = Host Bridge.
Bit Description
7:0 Base Class Code (BCC)—RO.
06h = Indicates the device is a bridge device.
Datasheet 781
PCI Express* Configuration Registers
19.1.9 CLS—Cache Line Size Register
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7/F6/F7)
Address Offset: 0Ch Attribute: R/W
Default Value: 00h Size: 8 bits
19.1.10 PLT—Primary Latency Timer Register
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7/F6/F7)
Address Offset: 0Dh Attribute: RO
Default Value: 00h Size: 8 bits
19.1.11 HEADTYP—Header Type Register
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7/F6/F7)
Address Offset: 0Eh Attribute: RO
Default Value: 81h Size: 8 bits
Bit Description
7:0 Cache Line Size (CLS)—R/W. This is read/write but contains no functionality, per the
PCI Express* Base Specification.
Bit Description
7:3 Latency Count. Reserved per the PCI Express* Base Specification.
2:0 Reserved
Bit Description
7
Multi-Function Device—RO.
0 = Single-function device.
1 = Multi-function device.
6:0
Configuration Layout—RO. This field is determined by bit 2 of the MPC register
(D28:F0-5:Offset D8h, bit 2).
00h = Indicates a Host Bridge.
01h = Indicates a PCI-to-PCI bridge.
PCI Express* Configuration Registers
782 Datasheet
19.1.12 BNUM—Bus Number Register
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7/F6/F7)
Address Offset: 18–1Ah Attribute: R/W
Default Value: 000000h Size: 24 bits
19.1.13 SLT—Secondary Latency Timer
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7/F6/F7)
Address Offset: 1Bh Attribute: RO
Default Value: 00h Size: 8 bits
19.1.14 IOBL—I/O Base and Limit Register
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7/F6/F7)
Address Offset: 1Ch–1Dh Attribute: R/W, RO
Default Value: 0000h Size: 16 bits
Bit Description
23:16 Subordinate Bus Number (SBBN)—R/W. Indicates the highest PCI bus number
below the bridge.
15:8 Secondary Bus Number (SCBN)—R/W. Indicates the bus number the port.
7:0 Primary Bus Number (PBN)—R/W. Indicates the bus number of the backbone.
Bit Description
7:0 Secondary Latency TimerReserved for a Root Port per the PCI Express* Base
Specification.
Bit Description
15:12 I/O Limit Address (IOLA)—R/W. I/O Base bits corresponding to address lines 15:12
for 4-KB alignment. Bits 11:0 are assumed to be padded to FFFh.
11:8 I/O Limit Address Capability (IOLC)R/O. Indicates that the bridge does not
support 32-bit I/O addressing.
7:4 I/O Base Address (IOBA)R/W. I/O Base bits corresponding to address lines 15:12
for 4-KB alignment. Bits 11:0 are assumed to be padded to 000h.
3:0 I/O Base Address Capability (IOBC)R/O. Indicates that the bridge does not
support 32-bit I/O addressing.
Datasheet 783
PCI Express* Configuration Registers
19.1.15 SSTS—Secondary Status Register
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7/F6/F7)
Address Offset: 1Eh–1Fh Attribute: R/WC
Default Value: 0000h Size: 16 bits
Bit Description
15
Detected Parity Error (DPE)—R/WC.
0 = No error.
1 = The port received a poisoned TLP.
14
Received System Error (RSE)—R/WC.
0 = No error.
1 = The port received an ERR_FATAL or ERR_NONFATAL message from the device.
13
Received Master Abort (RMA)—R/WC.
0 = Unsupported Request not received.
1 = The port received a completion with “Unsupported Request” status from the device.
12
Received Target Abort (RTA)—R/WC.
0 = Completion Abort not received.
1 = The port received a completion with “Completion Abort” status from the device.
11
Signaled Target Abort (STA)—R/WC.
0 = Completion Abort not sent.
1 = The port generated a completion with “Completion Abort” status to the device.
10:9 Secondary DEVSEL# Timing Status (SDTS): Reserved per PCI Express* Base
Specification.
8
Data Parity Error Detected (DPD)—R/WC.
0 = Conditions below did not occur.
1 = Set when the BCTRL.PERE (D28:FO/F1/F2/F3/F4/F5:3E: bit 0) is set, and either of
the following two conditions occurs:
Port receives completion marked poisoned.
Port poisons a write request to the secondary side.
7Secondary Fast Back to Back Capable (SFBC): Reserved per PCI Express* Base
Specification.
6 Reserved
5 Secondary 66 MHz Capable (SC66): Reserved per PCI Express* Base Specification.
4:0 Reserved
PCI Express* Configuration Registers
784 Datasheet
19.1.16 MBL—Memory Base and Limit Register
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7/F6/F7)
Address Offset: 20h–23h Attribute: R/W
Default Value: 00000000h Size: 32 bits
Accesses that are within the ranges specified in this register will be sent to the attached
device if CMD.MSE (D28:F0/F1/F2/F3/F4/F5/F6/F7/F6/F7:04:bit 1) is set. Accesses
from the attached device that are outside the ranges specified will be forwarded to the
backbone if CMD.BME (D28:F0/F1/F2/F3/F4/F5/F6/F7/F6/F7:04:bit 2) is set. The
comparison performed is MB AD[31:20] ML.
19.1.17 PMBL—Prefetchable Memory Base and Limit Register
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7/F6/F7)
Address Offset: 24h–27h Attribute: R/W, RO
Default Value: 00010001h Size: 32 bits
Accesses that are within the ranges specified in this register will be sent to the device if
CMD.MSE (D28:F0/F1/F2/F3/F4/F5/F6/F7/F6/F7;04, bit 1) is set. Accesses from the
device that are outside the ranges specified will be forwarded to the backbone if
CMD.BME (D28:F0/F1/F2/F3/F4/F5/F6/F7/F6/F7;04, bit 2) is set. The comparison
performed is
PMBU32:PMB AD[63:32]:AD[31:20] PMLU32:PML.
Bit Description
31:20 Memory Limit (ML)—R/W. These bits are compared with bits 31:20 of the incoming
address to determine the upper 1-MB aligned value of the range.
19:16 Reserved
15:4 Memory Base (MB)—R/W. These bits are compared with bits 31:20 of the incoming
address to determine the lower 1-MB aligned value of the range.
3:0 Reserved
Bit Description
31:20 Prefetchable Memory Limit (PML)—R/W. These bits are compared with bits 31:20 of
the incoming address to determine the upper 1-MB aligned value of the range.
19:16 64-bit Indicator (I64L)—RO. Indicates support for 64-bit addressing
15:4 Prefetchable Memory Base (PMB)—R/W. These bits are compared with bits 31:20 of
the incoming address to determine the lower 1-MB aligned value of the range.
3:0 64-bit Indicator (I64B)—RO. Indicates support for 64-bit addressing
Datasheet 785
PCI Express* Configuration Registers
19.1.18 PMBU32—Prefetchable Memory Base Upper 32 Bits
Register (PCI Express*—D28:F0/F1/F2/F3/F4/F5/
F6/F7/F6/F7)
Address Offset: 28h–2Bh Attribute: R/W
Default Value: 00000000h Size: 32 bits
19.1.19 PMLU32—Prefetchable Memory Limit Upper 32 Bits
Register (PCI Express*—D28:F0/F1/F2/F3/F4/F5/
F6/F7/F6/F7)
Address Offset: 2Ch–2Fh Attribute: R/W
Default Value: 00000000h Size: 32 bits
19.1.20 CAPP—Capabilities List Pointer Register
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7/F6/F7)
Address Offset: 34h Attribute: R0
Default Value: 40h Size: 8 bits
Bit Description
31:0 Prefetchable Memory Base Upper Portion (PMBU)—R/W. Upper 32-bits of the
prefetchable address base.
Bit Description
31:0 Prefetchable Memory Limit Upper Portion (PMLU)—R/W. Upper 32-bits of the
prefetchable address limit.
Bit Description
7:0 Capabilities Pointer (PTR)—RO. Indicates that the pointer for the first entry in the
capabilities list is at 40h in configuration space.
PCI Express* Configuration Registers
786 Datasheet
19.1.21 INTR—Interrupt Information Register
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7/F6/F7)
Address Offset: 3Ch–3Dh Attribute: R/W, RO
Default Value: See bit description Size: 16 bits
Function Level Reset: No (Bits 7:0 only)
Bit Description
15:8
Interrupt Pin (IPIN)—RO. Indicates the interrupt pin driven by the root port. At
reset, this register takes on the following values, which reflect the reset state of the
D28IP register in chipset config space:
NOTE: The value that is programmed into D28IP is always reflected in this register.
7:0
Interrupt Line (ILINE)—R/W. Default = 00h. Software written value to indicate which
interrupt line (vector) the interrupt is connected to. No hardware action is taken on this
register. These bits are not reset by FLR.
Port Reset Value
1 D28IP.P1IP
2 D28IP.P2IP
3 D28IP.P3IP
4 D28IP.P4IP
5 D28IP.P5IP
6 D28IP.P6IP
7 D28IP.P7IP
8 D28IP.P8IP
Datasheet 787
PCI Express* Configuration Registers
19.1.22 BCTRL—Bridge Control Register
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7/F6/F7)
Address Offset: 3Eh–3Fh Attribute: R/W
Default Value: 0000h Size: 16 bits
Bit Description
15:12 Reserved
11 Discard Timer SERR# Enable (DTSE): Reserved per PCI Express* Base Specification,
Revision 1.0a
10 Discard Timer Status (DTS): Reserved per PCI Express* Base Specification, Revision
1.0a.
9Secondary Discard Timer (SDT): Reserved per PCI Express* Base Specification,
Revision 1.0a.
8Primary Discard Timer (PDT): Reserved per PCI Express* Base Specification, Revision
1.0a.
7Fast Back to Back Enable (FBE): Reserved per PCI Express* Base Specification,
Revision 1.0a.
6Secondary Bus Reset (SBR)—R/W. Triggers a hot reset on the PCI Express* port.
5 Master Abort Mode (MAM): Reserved per Express specification.
4
VGA 16-Bit Decode (V16)—R/W.
0 = VGA range is enabled.
1 = The I/O aliases of the VGA range (see BCTRL:VE definition below), are not enabled,
and only the base I/O ranges can be decoded.
3
VGA Enable (VE)—R/W.
0 = The ranges below will not be claimed off the backbone by the root port.
1 = The following ranges will be claimed off the backbone by the root port:
Memory ranges A0000h–BFFFFh
I/O ranges 3B0h – 3BBh and 3C0h – 3DFh, and all aliases of bits 15:10 in any
combination of 1s
2
ISA Enable (IE)—R/W. This bit only applies to I/O addresses that are enabled by the
I/O Base and I/O Limit registers and are in the first 64 KB of PCI I/O space.
0 = The root port will not block any forwarding from the backbone as described below.
1 = The root port will block any forwarding from the backbone to the device of I/O
transactions addressing the last 768 bytes in each 1-KB block (offsets 100h to
3FFh).
1
SERR# Enable (SE)—R/W.
0 = The messages described below are not forwarded to the backbone.
1 = ERR_COR, ERR_NONFATAL, and ERR_FATAL messages received are forwarded to
the backbone.
0
Parity Error Response Enable (PERE)—R/W. When set,
0 = Poisoned write TLPs and completions indicating poisoned TLPs will not set the
SSTS.DPD (D28:F0/F1/F2/F3/F4/F5/F6/F7:1E, bit 8).
1 = Poisoned write TLPs and completions indicating poisoned TLPs will set the
SSTS.DPD (D28:F0/F1/F2/F3/F4/F5/F6/F7:1E, bit 8).
PCI Express* Configuration Registers
788 Datasheet
19.1.23 CLIST—Capabilities List Register
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7)
Address Offset: 40–41h Attribute: RO
Default Value: 8010h Size: 16 bits
19.1.24 XCAP—PCI Express* Capabilities Register
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7)
Address Offset: 42h–43h Attribute: R/WO, RO
Default Value: 0042h Size: 16 bits
Bit Description
15:8 Next Capability (NEXT)—RO. Value of 80h indicates the location of the next pointer.
7:0 Capability ID (CID)—RO. Indicates this is a PCI Express* capability.
Bit Description
15:14 Reserved
13:9 Interrupt Message Number (IMN)—RO. The PCH does not have multiple MSI
interrupt numbers.
8
Slot Implemented (SI)R/WO. Indicates whether the root port is connected to a
slot. Slot support is platform specific. BIOS programs this field, and it is maintained
until a platform reset.
7:4 Device / Port Type (DT)—RO. Indicates this is a PCI Express* root port.
3:0 Capability Version (CV)—RO. Indicates PCI Express 2.0.
Datasheet 789
PCI Express* Configuration Registers
19.1.25 DCAP—Device Capabilities Register
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7)
Address Offset: 44h–47h Attribute: RO
Default Value: 00008000h Size: 32 bits
Bit Description
31:28 Reserved
27:26 Captured Slot Power Limit Scale (CSPS)—RO. Not supported.
25:18 Captured Slot Power Limit Value (CSPV)—RO. Not supported.
17:16 Reserved
15
Role Based Error Reporting (RBER)—RO. Indicates that this device implements the
functionality defined in the Error Reporting ECN as required by the PCI Express 2.0
specification.
14:12 Reserved
11:9 Endpoint L1 Acceptable Latency (E1AL)—RO. This field is reserved with a setting of
000b for devices other than Endpoints, per the PCI Express 2.0 specification.
8:6 Endpoint L0s Acceptable Latency (E0AL)—RO. This field is reserved with a setting of
000b for devices other than Endpoints, per the PCI Express 2.0 specification.
5Extended Tag Field Supported (ETFS)—RO. Indicates that 8-bit tag fields are
supported.
4:3 Phantom Functions Supported (PFS)—RO. No phantom functions supported.
2:0 Max Payload Size Supported (MPS)—RO. Indicates the maximum payload size
supported is 128B.
PCI Express* Configuration Registers
790 Datasheet
19.1.26 DCTL—Device Control Register
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7)
Address Offset: 48h–49h Attribute: R/W, RO
Default Value: 0000h Size: 16 bits
Bit Description
15 Reserved
14:12 Max Read Request Size (MRRS)—RO. Hardwired to 0.
11 Enable No Snoop (ENS)RO. Not supported. The root port will never issue non-snoop
requests.
10 Aux Power PM Enable (APME)—R/W. The OS will set this bit to 1 if the device
connected has detected aux power. It has no effect on the root port otherwise.
9 Phantom Functions Enable (PFE)—RO. Not supported.
8 Extended Tag Field Enable (ETFE)—RO. Not supported.
7:5 Max Payload Size (MPS)—R/W. The root port only supports 128-B payloads,
regardless of the programming of this field.
4 Enable Relaxed Ordering (ERO)—RO. Not supported.
3
Unsupported Request Reporting Enable (URE)—R/W.
0 = The root port will ignore unsupported request errors.
1 = Allows signaling ERR_NONFATAL, ERR_FATAL, or ERR_COR to the Root Control
register when detecting an unmasked Unsupported Request (UR). An ERR_COR is
signaled when a unmasked Advisory Non-Fatal UR is received. An ERR_FATAL,
ERR_or NONFATAL, is sent to the Root Control Register when an uncorrectable non-
Advisory UR is received with the severity set by the Uncorrectable Error Severity
register.
2
Fatal Error Reporting Enable (FEE)—R/W.
0 = The root port will ignore fatal errors.
1 = Enables signaling of ERR_FATAL to the Root Control register due to internally
detected errors or error messages received across the link. Other bits also control
the full scope of related error reporting.
1
Non-Fatal Error Reporting Enable (NFE)—R/W.
0 = The root port will ignore non-fatal errors.
1 = Enables signaling of ERR_NONFATAL to the Root Control register due to internally
detected errors or error messages received across the link. Other bits also control
the full scope of related error reporting.
0
Correctable Error Reporting Enable (CEE)—R/W.
0 = The root port will ignore correctable errors.
1 = Enables signaling of ERR_CORR to the Root Control register due to internally
detected errors or error messages received across the link. Other bits also control
the full scope of related error reporting.
Datasheet 791
PCI Express* Configuration Registers
19.1.27 DSTS—Device Status Register
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7)
Address Offset: 4Ah–4Bh Attribute: R/WC, RO
Default Value: 0010h Size: 16 bits
19.1.28 LCAP—Link Capabilities Register
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7)
Address Offset: 4Ch4Fh Attribute: R/WO, RO
Default Value: See bit description Size: 32 bits
Bit Description
15:6 Reserved
5
Transactions Pending (TDP)—RO. This bit has no meaning for the root port since
only one transaction may be pending to the PCH, so a read of this bit cannot occur until
it has already returned to 0.
4AUX Power Detected (APD)—RO. The root port contains AUX power for wakeup.
3Unsupported Request Detected (URD)—R/WC. Indicates an unsupported request
was detected.
2
Fatal Error Detected (FED)—R/WC. Indicates a fatal error was detected.
0 = Fatal has not occurred.
1 = A fatal error occurred from a data link protocol error, link training error, buffer
overflow, or malformed TLP.
1
Non-Fatal Error Detected (NFED)—R/WC. Indicates a non-fatal error was detected.
0 = Non-fatal has not occurred.
1 = A non-fatal error occurred from a poisoned TLP, unexpected completions,
unsupported requests, completer abort, or completer timeout.
0
Correctable Error Detected (CED)—R/WC. Indicates a correctable error was
detected.
0 = Correctable has not occurred.
1 = The port received an internal correctable error from receiver errors / framing
errors, TLP CRC error, DLLP CRC error, replay num rollover, replay timeout.
Bit Description
31:24
Port Number (PN)—RO. Indicates the port number for the root port. This value is
different for each implemented port:
Function Port # Value of PN Field
D28:F0 1 01h
D28:F1 2 02h
D28:F2 3 03h
D28:F3 4 04h
D28:F4 5 05h
D28:F5 6 06h
D28:F6 7 07h
D28:F7 8 08h
PCI Express* Configuration Registers
792 Datasheet
23:21 Reserved
20
Link Active Reporting Capable (LARC)—RO. Hardwired to 1 to indicate that this
port supports the optional capability of reporting the DL_Active state of the Data Link
Control and Management State Machine.
19:18 Reserved
17:15 L1 Exit Latency (EL1)—RO. Set to 010b to indicate an exit latency of 2 µs to 4 µs.
14:12
L0s Exit Latency (EL0)—RO. Indicates as exit latency based upon common-clock
configuration.
NOTE: LCLT.CCC is at D28:F0/F1/F2/F3/F4/F5/F6/F7:50h:bit 6
11:10
Active State Link PM Support (APMS)—R/WO. Indicates what level of active state
link power management is supported on the root port.
9:4
Maximum Link Width (MLW)—RO. For the root ports, several values can be taken,
based upon the value of the chipset config register field RPC.PC1 (Chipset Config
Registers:Offset 0224h:bits1:0) for Ports 1-4 and RPC.PC2 (Chipset Config
Registers:Offset 0224h:bits1:0) for Ports 5 and 6
3:0 Maximum Link Speed (MLS)—RO. Set to 1h to indicate the link speed is 2.5 Gb/s.
Bit Description
LCLT.CCC Value of EL0 (these bits)
0 MPC.UCEL (D28:F0/F1/F2/F3:D8h:bits20:18)
1 MPC.CCEL (D28:F0/F1/F2/F3:D8h:bits17:15)
Bits Definition
00b Neither L0s nor L1 are supported
01b L0s Entry Supported
10b L1 Entry Supported
11b Both L0s and L1 Entry Supported
Value of MLW Field
Port # RPC.PC1=00b RPC.PC1=11b
1 01h 04h
2 01h 01h
3 01h 01h
4 01h 01h
Port # RPC.PC2=00b RPC.PC2=11b
5 01h 04h
6 01h 01h
7 01h 01h
8 01h 01h
Datasheet 793
PCI Express* Configuration Registers
19.1.29 LCTL—Link Control Register
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7)
Address Offset: 50h-51h Attribute: R/W, RO
Default Value: 0000h Size: 16 bits
Bit Description
15:10 Reserved
9Hardware Autonomous Width Disable – RO. Hardware never attempts to change
the link width except when attempting to correct unreliable Link operation.
8 Reserved
7
Extended Synch (ES)—R/W.
0 = Extended synch disabled.
1 = Forces extended transmission of FTS ordered sets in FTS and extra TS2 at exit from
L1 prior to entering L0.
6
Common Clock Configuration (CCC)—R/W.
0 = The PCH and device are not using a common reference clock.
1 = The PCH and device are operating with a distributed common reference clock.
5
Retrain Link (RL)—R/W.
0 = This bit always returns 0 when read.
1 = The root port will train its downstream link.
NOTE: Software uses LSTS.LT (D28:F0/F1/F2/F3/F4/F5/F6/F7:52, bit 11) to check the
status of training.
NOTE: It is permitted to write 1b to this bit while simultaneously writing modified
values to other fields in this register. If the LTSSM is not already in Recovery or
Configuration, the resulting Link training must use the modified values. If the
LTSSM is already in Recovery or Configuration, the modified values are not
required to affect the Link training that is already in progress.
4
Link Disable (LD)—R/W.
0 = Link enabled.
1 = The root port will disable the link.
3Read Completion Boundary Control (RCBC)—RO. Indicates the read completion
boundary is 64 bytes.
2 Reserved
1:0
Active State Link PM Control (APMC)—R/W. Indicates whether the root port should
enter L0s or L1 or both.
Bits Definition
00 Disabled
01 L0s Entry Enabled
10 L1 Entry Enabled
11 L0s and L1 Entry Enabled
PCI Express* Configuration Registers
794 Datasheet
19.1.30 LSTS—Link Status Register
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7)
Address Offset: 52h–53h Attribute: RO
Default Value: See bit description Size: 16 bits
Bit Description
15:14 Reserved
13
Data Link Layer Active (DLLA)—RO. Default value is 0b.
0 = Data Link Control and Management State Machine is not in the DL_Active state
1 = Data Link Control and Management State Machine is in the DL_Active state
12 Slot Clock Configuration (SCC)—RO. Set to 1b to indicate that the PCH uses the
same reference clock as on the platform and does not generate its own clock.
11
Link Training (LT)—RO. Default value is 0b.
0 = Link training completed.
1 = Link training is occurring.
10 Link Training Error (LTE)—RO. Not supported. Set value is 0b.
9:4
Negotiated Link Width (NLW)—RO. This field indicates the negotiated width of the
given PCI Express* link. The contents of this NLW field is undefined if the link has not
successfully trained.
NOTE: 000001b = x1 link width, 000010b =x2 linkwidth, 000100b = x4 linkwidth
3:0
Link Speed (LS)—RO. This field indicates the negotiated Link speed of the given PCI
Express* link.
01h = Link is 2.5 Gb/s.
Port # Possible Values
1 000001b, 000010b, 000100b
2 000001b
3 000001b
4 000001b
5 000001b, 000010b, 000100b
6 000001b
7 000001b
8 000001b
Datasheet 795
PCI Express* Configuration Registers
19.1.31 SLCAP—Slot Capabilities Register
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7)
Address Offset: 54h57h Attribute: R/WO, RO
Default Value: 00040060h Size: 32 bits
Bit Description
31:19 Physical Slot Number (PSN)—R/WO. This is a value that is unique to the slot
number. BIOS sets this field and it remains set until a platform reset.
18:17 Reserved
16:15 Slot Power Limit Scale (SLS)—R/WO. Specifies the scale used for the slot power
limit value. BIOS sets this field and it remains set until a platform reset.
14:7
Slot Power Limit Value (SLV)—R/WO. Specifies the upper limit (in conjunction with
SLS value), on the upper limit on power supplied by the slot. The two values together
indicate the amount of power in watts allowed for the slot. BIOS sets this field and it
remains set until a platform reset.
6Hot Plug Capable (HPC)—R/WO.
1b = Indicates that Hot-Plug is supported.
5Hot Plug Surprise (HPS)—R/WO.
1b = Indicates the device may be removed from the slot without prior notification.
4Power Indicator Present (PIP)—RO.
0b = Indicates that a power indicator LED is not present for this slot.
3Attention Indicator Present (AIP)—RO.
0b = Indicates that an attention indicator LED is not present for this slot.
2MRL Sensor Present (MSP)—RO.
0b = Indicates that an MRL sensor is not present.
1Power Controller Present (PCP)—RO.
0b = Indicates that a power controller is not implemented for this slot.
0Attention Button Present (ABP)—RO.
0b = Indicates that an attention button is not implemented for this slot.
PCI Express* Configuration Registers
796 Datasheet
19.1.32 SLCTL—Slot Control Register
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7)
Address Offset: 58h59h Attribute: R/W, RO
Default Value: 0000h Size: 16 bits
Bit Description
15:13 Reserved
12
Link Active Changed Enable (LACE)—R/W. When set, this field enables generation
of a hot plug interrupt when the Data Link Layer Link Active field (D28:F0/F1/F2/F3/F4/
F5/F6/F7:52h:bit 13) is changed.
11 Reserved
10 Power Controller Control (PCC)—RO.This bit has no meaning for module based Hot-
Plug.
9:6 Reserved
5
Hot Plug Interrupt Enable (HPE)—R/W.
0 = Hot plug interrupts based on Hot-Plug events is disabled.
1 = Enables generation of a Hot-Plug interrupt on enabled Hot-Plug events.
4Reserved
3
Presence Detect Changed Enable (PDE)—R/W.
0 = Hot plug interrupts based on presence detect logic changes is disabled.
1 = Enables the generation of a Hot-Plug interrupt or wake message when the presence
detect logic changes state.
2:0 Reserved
Datasheet 797
PCI Express* Configuration Registers
19.1.33 SLSTS—Slot Status Register
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7)
Address Offset: 5Ah5Bh Attribute: R/WC, RO
Default Value: 0000h Size: 16 bits
Bit Description
15:9 Reserved
8
Link Active State Changed (LASC)—R/WC.
1 = This bit is set when the value reported in Data Link Layer Link Active field of the
Link Status register (D28:F0/F1/F2/F3/F4/F5/F6/F7:52h:bit 13) is changed. In
response to a Data Link Layer State Changed event, software must read Data Link
Layer Link Active field of the Link Status register to determine if the link is active
before initiating configuration cycles to the hot plugged device.
7 Reserved
6
Presence Detect State (PDS)—RO. If XCAP.SI (D28:F0/F1/F2/F3/F4/F5/F6/
F7:42h:bit 8) is set (indicating that this root port spawns a slot), then this bit:
0 = Indicates the slot is empty.
1 = Indicates the slot has a device connected.
Otherwise, if XCAP.SI is cleared, this bit is always set (1).
5 MRL Sensor State (MS)—Reserved as the MRL sensor is not implemented.
4 Reserved
3
Presence Detect Changed (PDC)—R/WC.
0 = No change in the PDS bit.
1 = The PDS bit changed states.
2MRL Sensor Changed (MSC)—Reserved as the MRL sensor is not implemented.
1Power Fault Detected (PFD)—Reserved as a power controller is not implemented.
0 Reserved
PCI Express* Configuration Registers
798 Datasheet
19.1.34 RCTL—Root Control Register
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7)
Address Offset: 5Ch5Dh Attribute: R/W
Default Value: 0000h Size: 16 bits
19.1.35 RSTS—Root Status Register
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7)
Address Offset: 60h63h Attribute: R/WC, RO
Default Value: 00000000h Size: 32 bits
Bit Description
15:4 Reserved
3
PME Interrupt Enable (PIE)—R/W.
0 = Interrupt generation disabled.
1 = Interrupt generation enabled when PCISTS.Inerrupt Status (D28:F0/F1/F2/F3/F4/
F5/F6/F7:60h, bit 16) is in a set state (either due to a 0 to 1 transition, or due to
this bit being set with RSTS.IS already set).
2
System Error on Fatal Error Enable (SFE)—R/W.
0 = An SERR# will not be generated.
1 = An SERR# will be generated, assuming CMD.SEE (D28:F0/F1/F2/F3/F4/F5/F6/
F7:04, bit 8) is set, if a fatal error is reported by any of the devices in the hierarchy
of this root port, including fatal errors in this root port.
1
System Error on Non-Fatal Error Enable (SNE)—R/W.
0 = An SERR# will not be generated.
1 = An SERR# will be generated, assuming CMD.SEE (D28:F0/F1/F2/F3/F4/F5/F6/
F7:04, bit 8) is set, if a non-fatal error is reported by any of the devices in the
hierarchy of this root port, including non-fatal errors in this root port.
0
System Error on Correctable Error Enable (SCE)—R/W.
0 = An SERR# will not be generated.
1 = An SERR# will be generated, assuming CMD.SEE (D28:F0/F1/F2/F3/F4/F5/F6/
F7:04, bit 8) if a correctable error is reported by any of the devices in the hierarchy
of this root port, including correctable errors in this root port.
Bit Description
31:18 Reserved
17
PME Pending (PP)—RO.
0 = When the original PME is cleared by software, it will be set again, the requestor ID
will be updated, and this bit will be cleared.
1 = Indicates another PME is pending when the PME status bit is set.
16
PME Status (PS)R/WC.
0 = PME was not asserted.
1 = Indicates that PME was asserted by the requestor ID in RID. Subsequent PMEs are
kept pending until this bit is cleared.
15:0 PME Requestor ID (RID)—RO. Indicates the PCI requestor ID of the last PME
requestor. Valid only when PS is set.
Datasheet 799
PCI Express* Configuration Registers
19.1.36 DCAP2—Device Capabilities 2 Register
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7)
Address Offset: 64h67h Attribute: RO
Default Value: 00000016h Size: 32 bits
19.1.37 DCTL2—Device Control 2 Register
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7)
Address Offset: 68h69h Attribute: RO, R/W
Default Value: 0000h Size: 16 bits
Bit Description
31:5 Reserved
4Completion Timeout Disable Supported (CTDS)—RO. A value of 1b
indicates support for the Completion Timeout Disable mechanism.
3:0
Completion Timeout Ranges Supported (CTRS) – RO. This field indicates device
support for the optional Completion Timeout programmability mechanism. This
mechanism allows system software to modify the Completion Timeout value.
This field is hardwired to support 10 ms to 250 ms and 250 ms to 4 s.
Bit Description
15:5 Reserved
4
Completion Timeout Disable (CTD)—RW. When set to 1b, this bit
disables the Completion Timeout mechanism.
If there are outstanding requests when the bit is cleared, it is permitted but not
required for hardware to apply the completion timeout mechanism to the outstanding
requests. If this is done, it is permitted to base the start time for each request on either
the time this bit was cleared or the time each request was issued.
3:0
Completion Timeout Value (CTV)—RW. This field allows system software
to modify the Completion Timeout value.
0000b = Default range: 40–50 ms (spec range 50 us to 50 ms)
0101b = 40–50 ms (spec range is 16 ms to 55 ms)
0110b = 160–170 ms (spec range is 65 ms to 210 ms)
1001b = 400–500 ms (spec range is 260 ms to 900 ms)
1010b = 1.6–1.7 s (spec range is 1 s to 3.5 s)
All other values are Reserved.
NOTE: Software is permitted to change the value in this field at any time. For requests
already pending when the Completion Timeout Value is changed, hardware is
permitted to use either the new or the old value for the outstanding requests,
and is permitted to base the start time for each request either on when this
value was changed or on when each request w as issued.
PCI Express* Configuration Registers
800 Datasheet
19.1.38 LCTL2—Link Control 2 Register
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7)
Address Offset: 70h71h Attribute: RO
Default Value: 0001h Size: 16 bits
19.1.39 MID—Message Signaled Interrupt Identifiers Register
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7)
Address Offset: 80h–81h Attribute: RO
Default Value: 9005h Size: 16 bits
19.1.40 MC—Message Signaled Interrupt Message Control Register
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7)
Address Offset: 82–83h Attribute: R/W, RO
Default Value: 0000h Size: 16 bits
Bit Description
15:4 Reserved
3:0
Target Link Speed (TLS)—RO. This field sets an upper limit on Link operational speed
by restricting the values advertised by the upstream component in its training
sequences.
0001b: 2.5 GT/s Target Link Speed
All other values reserved
Bit Description
15:8 Next Pointer (NEXT)—RO. Indicates the location of the next pointer in the list.
7:0 Capability ID (CID)—RO. Capabilities ID indicates MSI.
Bit Description
15:8 Reserved
764 Bit Address Capable (C64)—RO. Capable of generating a 32-bit message only.
6:4 Multiple Message Enable (MME)—R/W. These bits are R/W for software
compatibility, but only one message is ever sent by the root port.
3:1 Multiple Message Capable (MMC)RO. Only one message is required.
0
MSI Enable (MSIE)—R/W.
0 = MSI is disabled.
1 = MSI is enabled and traditional interrupt pins are not used to generate interrupts.
NOTE: CMD.BME (D28:F0/F1/F2/F3/F4/F5/F6/F7:04h:bit 2) must be set for an MSI to
be generated. If CMD.BME is cleared, and this bit is set, no interrupts (not even
pin based) are generated.
Datasheet 801
PCI Express* Configuration Registers
19.1.41 MA—Message Signaled Interrupt Message Address
Register (PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7)
Address Offset: 84h87h Attribute: R/W
Default Value: 00000000h Size: 32 bits
19.1.42 MD—Message Signaled Interrupt Message Data Register
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7)
Address Offset: 88h89h Attribute: R/W
Default Value: 0000h Size: 16 bits
19.1.43 SVCAP—Subsystem Vendor Capability Register
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7)
Address Offset: 90h91h Attribute: RO
Default Value: A00Dh Size: 16 bits
19.1.44 SVID—Subsystem Vendor Identification Register
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7)
Address Offset: 94h97h Attribute: R/WO
Default Value: 00000000h Size: 32 bits
Bit Description
31:2 Address (ADDR)—R/W. Lower 32 bits of the system specified message address,
always DW aligned.
1:0 Reserved
Bit Description
15:0
Data (DATA)—R/W. This 16-bit field is programmed by system software if MSI is
enabled. Its content is driven onto the lower word (PCI AD[15:0]) during the data
phase of the MSI memory write transaction.
Bit Description
15:8 Next Capability (NEXT)—RO. Indicates the location of the next pointer in the list.
7:0 Capability Identifier (CID)—RO. Value of 0Dh indicates this is a PCI bridge
subsystem vendor capability.
Bit Description
31:16
Subsystem Identifier (SID)—R/WO. Indicates the subsystem as identified by the
vendor. This field is write once and is locked down until a bridge reset occurs (not the
PCI bus reset).
15:0
Subsystem Vendor Identifier (SVID)—R/WO. Indicates the manufacturer of the
subsystem. This field is write once and is locked down until a bridge reset occurs (not
the PCI bus reset).
PCI Express* Configuration Registers
802 Datasheet
19.1.45 PMCAP—Power Management Capability Register
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7)
Address Offset: A0hA1h Attribute: RO
Default Value: 0001h Size: 16 bits
19.1.46 PMC—PCI Power Management Capabilities Register
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7)
Address Offset: A2hA3h Attribute: RO
Default Value: C802h Size: 16 bits
Bit Description
15:8 Next Capability (NEXT)—RO. Indicates this is the last item in the list.
7:0 Capability Identifier (CID)—RO. Value of 01h indicates this is a PCI power
management capability.
Bit Description
15:11
PME_Support (PMES)—RO. Indicates PME# is supported for states D0, D3HOT and
D3COLD. The root port does not generate PME#, but reporting that it does is necessary
for some legacy operating systems to enable PME# in devices connected behind this
root port.
10 D2_Support (D2S)—RO. The D2 state is not supported.
9 D1_Support (D1S)—RO The D1 state is not supported.
8:6 Aux_Current (AC)—RO. Reports 375 mA maximum suspend well current required
when in the D3COLD state.
5
Device Specific Initialization (DSI)—RO.
1 = Indicates that no device-specific initialization is required.
4Reserved
3
PME Clock (PMEC)—RO.
1 = Indicates that PCI clock is not required to generate PME#.
2:0 Version (VS)—RO. Indicates support for Revision 1.1 of the PCI Power Management
Specification.
Datasheet 803
PCI Express* Configuration Registers
19.1.47 PMCS—PCI Power Management Control and Status
Register (PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7)
Address Offset: A4hA7h Attribute: R/W, RO
Default Value: 00000000h Size: 32 bits
Bit Description
31:24 Reserved
23 Bus Power / Clock Control Enable (BPCE)Reserved per PCI Express* Base
Specification, Revision 1.0a.
22 B2/B3 Support (B23S)—Reserved per PCI Express* Base Specification, Revision 1.0a.
21:16 Reserved
15
PME Status (PMES)—RO.
1 = Indicates a PME was received on the downstream link.
14:9 Reserved
8
PME Enable (PMEE)—R/W.
1 = Indicates PME is enabled. The root port takes no action on this bit, but it must be
R/W for some legacy operating systems to enable PME# on devices connected to
this root port.
This bit is sticky and resides in the resume well. The reset for this bit is RSMRST# which
is not asserted during a warm reset.
7:2 Reserved
1:0
Power State (PS)R/W. This field is used both to determine the current power state
of the root port and to set a new power state. The values are:
00 = D0 state
11 = D3HOT state
NOTE: When in the D3HOT state, the controller’s configuration space is available, but
the I/O and memory spaces are not. Type 1 configuration cycles are also not
accepted. Interrupts are not required to be blocked as software will disable
interrupts prior to placing the port into D3HOT
. If software attempts to write a
‘10’ or ‘01’ to these bits, the write will be ignored.
PCI Express* Configuration Registers
804 Datasheet
19.1.48 MPC2—Miscellaneous Port Configuration Register 2
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7)
Address Offset: D4hD7h Attribute: R/W, RO
Default Value: 00000000h Size: 32 bits
Bit Description
31:6 Reserved
5
PCIe 2.0 Compliance Mode Enable (PCME)—R/W.
0 = Compliance mode is disabled.
1 = With proper termination PCH PCIe ports will transmit compliance pattern.
Note: This bit should only be set when testing for electrical compliance specified by the PCI
SIG. This bit should not be set during normal system operations.
4
ASPM Control Override Enable (ASPMCOEN)—RW.
1 = Root port will use the values in the ASPM Control Override registers
0 = Root port will use the ASPM Registers in the Link Control register.
NOTES:This register allows BIOS to control the root port ASPM settings instead of
the OS.
3:2
ASPM Control Override (ASPMO)—RW. Provides BIOS control of whether root
port should enter L0s or L1 or both.
00 = Disabled
01 = L0s Entry Enabled
10 = L1 Entry Enabled
11 = L0s and L1 Entry Enabled.
1
EOI Forwarding Disable (EOIFD)—R/W. When set, EOI messages are not
claimed on the backbone by this port an will not be forwarded across the PCIe link.
0 = Broadcast EOI messages that are sent on the backbone are claimed by this
port and forwarded across the PCIe link.
1 = Broadcast EOI messages are not claimed on the backbone by this port and will
not be forwarded across the PCIe Link.
0
L1 Completion Timeout Mode (LICTM)—R/W.
0 = PCI Express Specification Compliant. Completion timeout is disabled during
software initiated L1, and enabled during ASPM initiate L1.
1 = Completion timeout is enabled during L1, regardless of how L1 entry was
initiated.
Datasheet 805
PCI Express* Configuration Registers
19.1.49 MPC—Miscellaneous Port Configuration Register
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7)
Address Offset: D8hDBh Attribute: R/W, RO
Default Value: 08110000h Size: 32 bits
Bit Description
31
Power Management SCI Enable (PMCE)—R/W.
0 = SCI generation based on a power management event is disabled.
1 = Enables the root port to generate SCI whenever a power management event is
detected.
30
Hot Plug SCI Enable (HPCE)—R/W.
0 = SCI generation based on a Hot-Plug event is disabled.
1 = Enables the root port to generate SCI whenever a Hot-Plug event is detected.
29
Link Hold Off (LHO)—R/W.
1 = Port will not take any TLP. This is used during loopback mode to fill up the
downstream queue.
28
Address Translator Enable (ATE)—R/W. This bit is used to enable address
translation using the AT bits in this register during loopback mode.
0 = Disable
1 = Enable
27
Lane Reversal (LR)—R/O.
This register reads the setting of the PCIELR1 Soft Strap.
0 = PCI Express Lanes 0–3 are reversed.
1 = No Lane reversal (default).
NOTE: The port configuration straps must be set such that Port 1 or Port 5 is configured
as a x4 port using lanes 0–3, or 4–7 when Lane Reversal is enabled. x2 lane
reversal is not supported.
NOTE: This register is only valid on port 1 (for ports 1–4) or port 5 (for ports 5–8).
26
Invalid Receive Bus Number Check Enable (IRBNCE)—R/W. When set, the receive
transaction layer will signal an error if the bus number of a Memory request does not
fall within the range between SCBN and SBBN. If this check is enabled and the request
is a memory write, it is treated as an Unsupported Request. If this check is enabled and
the request is a non-posted memory read request, the request is considered a
Malformed TLP and a fatal error.
Messages, I/O, Config, and Completions are never checked for valid bus number.
25
Invalid Receive Range Check Enable (IRRCE)—R/W. When set, the receive
transaction layer will treat the TLP as an Unsupported Request error if the address
range of a Memory request does not outside the range between prefetchable and non-
prefetchable base and limit.
Messages, I/O, Configuration, and Completions are never checked for valid address
ranges.
24
BME Receive Check Enable (BMERCE)—R/W. When set, the receive transaction
layer will treat the TLP as an Unsupported Request error if a memory read or write
request is received and the Bus Master Enable bit is not set.
Messages, IO, Config, and Completions are never checked for BME.
23 Reserved
PCI Express* Configuration Registers
806 Datasheet
22
Detect Override (FORCEDET)—R/W.
0 = Normal operation. Detected output from AFE is sampled for presence detection.
1 = Override mode. Ignores AFE detect output and link training proceeds as if a device
were detected.
21
Flow Control During L1 Entry (FCDL1E)—R/W.
0 = No flow control update DLLPs sent during L1 Ack transmission.
1 = Flow control update DLLPs sent during L1 Ack transmission as required to meet the
30 μs periodic flow control update.
20:18
Unique Clock Exit Latency (UCEL)—R/W. This value represents the L0s Exit Latency
for unique-clock configurations (LCTL.CCC = 0) (D28:F0/F1/F2/F3/F4/F5/F6/F7:Offset
50h:bit 6). It defaults to 512 ns to less than 1 µs, but may be overridden by BIOS.
17:15
Common Clock Exit Latency (CCEL)—R/W. This value represents the L0s Exit
Latency for common-clock configurations (LCTL.CCC = 1) (D28:F0/F1/F2/F3/F4/F5/F6/
F7:Offset 50h:bit 6). It defaults to 128 ns to less than 256 ns, but may be overridden
by BIOS.
14:8 Reserved
7
Port I/OxApic Enable (PAE)—R/W.
0 = Hole is disabled.
1 = A range is opened through the bridge for the following memory addresses:
6:3 Reserved
2
Bridge Type (BT)—RO. This register can be used to modify the Base Class and Header
Type fields from the default P2P bridge to a Host Bridge. Having the root port appear as
a Host Bridge is useful in some server configurations.
0 = The root port bridge type is a P2P Bridge, Header Sub-Class = 04h, and Header
Type = Type 1.
1 = The root port bridge type is a P2P Bridge, Header Sub-Class = 00h, and Header
Type = Type 0.
1
Hot Plug SMI Enable (HPME)—R/W.
0 = SMI generation based on a Hot-Plug event is disabled.
1 = Enables the root port to generate SMI whenever a Hot-Plug event is detected.
0
Power Management SMI Enable (PMME)—R/W.
0 = SMI generation based on a power management event is disabled.
1 = Enables the root port to generate SMI whenever a power management event is
detected.
Bit Description
Port # Address
1 FEC1_0000h – FEC1_7FFFh
2 FEC1_8000h – FEC1_FFFFh
3 FEC2_0000h – FEC2_7FFFh
4 FEC2_8000h – FEC2_FFFFh
5 FEC3_0000h – FEC3_7FFFh
6 FEC3_8000h – FEC3_FFFFh
7 FEC4_0000h – FEC4_7FFFh
8 FEC4_8000h – FEC4_FFFFh
Datasheet 807
PCI Express* Configuration Registers
19.1.50 SMSCS—SMI/SCI Status Register
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7)
Address Offset: DChDFh Attribute: R/WC
Default Value: 00000000h Size: 32 bits
Bit Description
31
Power Management SCI Status (PMCS)—R/WC.
1 = PME control logic needs to generate an interrupt, and this interrupt has been
routed to generate an SCI.
30
Hot Plug SCI Status (HPCS)—R/WC.
1 = Hot-Plug controller needs to generate an interrupt, and has this interrupt been
routed to generate an SCI.
29:5 Reserved
4
Hot Plug Link Active State Changed SMI Status (HPLAS)—R/WC.
1 = SLSTS.LASC (D28:F0/F1/F2/F3/F4/F5/F6/F7:5A, bit 8) transitioned from 0-to-1,
and MPC.HPME (D28:F0/F1/F2/F3/F4/F5/F6/F7:D8, bit 1) is set. When this bit is
set, an SMI# will be generated.
3:2 Reserved
1
Hot Plug Presence Detect SMI Status (HPPDM)—R/WC.
1 = SLSTS.PDC (D28:F0/F1/F2/F3/F4/F5/F6/F7:5A, bit 3) transitioned from 0-to-1,
and MPC.HPME (D28:F0/F1/F2/F3/F4/F5/F6/F7:D8, bit 1) is set. When this bit is
set, an SMI# will be generated.
0
Power Management SMI Status (PMMS)—R/WC.
1 = RSTS.PS (D28:F0/F1/F2/F3/F4/F5/F6/F7:60, bit 16) transitioned from 0-to-1, and
MPC.PMME (D28:F0/F1/F2/F3/F4/F5/F6/F7:D8, bit 1) is set.
PCI Express* Configuration Registers
808 Datasheet
19.1.51 RPDCGEN—Root Port Dynamic Clock Gating Enable
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7)
Address Offset: E1h Attribute: R/W
Default Value: 00h Size: 8-bits
19.1.52 PECR1—PCI Express* Configuration Register 1
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7)
Address Offset: E8h–EBh Attribute: R/W
Default Value: 00000020h Size: 32 bits
Bits Description
7:4 Reserved. RO
3
Shared Resource Dynamic Link Clock Gating Enable (SRDLCGEN)—RW.
0 = Disables dynamic clock gating of the shared resource link clock domain.
1 = Enables dynamic clock gating on the root port shared resource link clock domain.
Only the value from Port 1 is used for ports 1–4. Only the value from Port 5 is used for
ports 5–8.
2
Shared Resource Dynamic Backbone Clock Gate Enable (SRDBCGEN)—RW.
0 = Disables dynamic clock gating of the shared resource backbone clock domain.
1 = Enables dynamic clock gating on the root port shared resource backbone clock
domain.
Only the value from Port 1 is used for ports 1–4. Only the value from Port 5 is used for
ports 5–8.
1
Root Port Dynamic Link Clock Gate Enable (RPDLCGEN)—RW.
0 = Disables dynamic clock gating of the root port link clock domain.
1 = Enables dynamic clock gating on the root port link clock domain.
0
Root Port Dynamic Backbone Clock Gate Enable (RPDBCGEN)—RW.
0 = Disables dynamic clock gating of the root port backbone clock domain.
1 = Enables dynamic clock gating on the root port backbone clock domain.
Bit Description
31:2 Reserved
1PECR1 Field 2—R/W. BIOS may set this bit to 1.
0 Reserved
Datasheet 809
PCI Express* Configuration Registers
19.1.53 UES—Uncorrectable Error Status Register
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7)
Address Offset: 104h107h Attribute: R/WC, RO
Default Value: 00000000000x0xxx0x0x0000000x0000b Size: 32 bits
This register maintains its state through a platform reset. It loses its state upon
suspend.
Bit Description
31:21 Reserved
20 Unsupported Request Error Status (URE)—R/WC. Indicates an unsupported
request was received.
19 ECRC Error Status (EE)—RO. ECRC is not supported.
18 Malformed TLP Status (MT)—R/WC. Indicates a malformed TLP was received.
17 Receiver Overflow Status (RO)—R/WC. Indicates a receiver overflow occurred.
16 Unexpected Completion Status (UC)—R/WC. Indicates an unexpected completion
was received.
15 Completion Abort Status (CA)—R/WC. Indicates a completer abort was received.
14
Completion Timeout Status (CT)—R/WC. Indicates a completion timed out. This bit
is set if Completion Timeout is enabled and a completion is not returned within the time
specified by the Completion TImeout Value
13 Flow Control Protocol Error Status (FCPE)—RO. Flow Control Protocol Errors not
supported.
12 Poisoned TLP Status (PT)—R/WC. Indicates a poisoned TLP was received.
11:5 Reserved
4Data Link Protocol Error Status (DLPE)—R/WC. Indicates a data link protocol error
occurred.
3:1 Reserved
0Training Error Status (TE)—RO. Training Errors not supported.
PCI Express* Configuration Registers
810 Datasheet
19.1.54 UEM—Uncorrectable Error Mask
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7)
Address Offset: 108h10Bh Attribute: R/WO, RO
Default Value: 00000000h Size: 32 bits
When set, the corresponding error in the UES register is masked, and the logged error
will cause no action. When cleared, the corresponding error is enabled.
Bit Description
31:21 Reserved
20
Unsupported Request Error Mask (URE)—R/WO.
0 = The corresponding error in the UES register (D28:F0/F1/F2/F3/F4/F5/F6/F7:144) is
enabled.
1 = The corresponding error in the UES register (D28:F0/F1/F2/F3/F4/F5/F6/F7:144) is
masked.
19 ECRC Error Mask (EE)—RO. ECRC is not supported.
18
Malformed TLP Mask (MT)—R/WO.
0 = The corresponding error in the UES register (D28:F0/F1/F2/F3/F4/F5/F6/F7:144) is
enabled.
1 = The corresponding error in the UES register (D28:F0/F1/F2/F3/F4/F5/F6/F7:144) is
masked.
17
Receiver Overflow Mask (RO)—R/WO.
0 = The corresponding error in the UES register (D28:F0/F1/F2/F3/F4/F5/F6/F7:144) is
enabled.
1 = The corresponding error in the UES register (D28:F0/F1/F2/F3/F4/F5/F6/F7:144) is
masked.
16
Unexpected Completion Mask (UC)—R/WO.
0 = The corresponding error in the UES register (D28:F0/F1/F2/F3/F4/F5/F6/F7:144) is
enabled.
1 = The corresponding error in the UES register (D28:F0/F1/F2/F3/F4/F5/F6/F7:144) is
masked.
15
Completion Abort Mask (CA)—R/WO.
0 = The corresponding error in the UES register (D28:F0/F1/F2/F3/F4/F5/F6/F7:144) is
enabled.
1 = The corresponding error in the UES register (D28:F0/F1/F2/F3/F4/F5/F6/F7:144) is
masked.
14
Completion Timeout Mask (CT)—R/WO.
0 = The corresponding error in the UES register (D28:F0/F1/F2/F3/F4/F5/F6/F7:144) is
enabled.
1 = The corresponding error in the UES register (D28:F0/F1/F2/F3/F4/F5/F6/F7:144) is
masked.
13 Flow Control Protocol Error Mask (FCPE)—RO. Flow Control Protocol Errors not
supported.
12
Poisoned TLP Mask (PT)—R/WO.
0 = The corresponding error in the UES register (D28:F0/F1/F2/F3/F4/F5/F6/F7:144) is
enabled.
1 = The corresponding error in the UES register (D28:F0/F1/F2/F3/F4/F5/F6/F7:144) is
masked.
11:5 Reserved
Datasheet 811
PCI Express* Configuration Registers
19.1.55 UEV—Uncorrectable Error Severity
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7)
Address Offset: 10Ch10Fh Attribute: RO, R/W
Default Value: 00060011h Size: 32 bits
4
Data Link Protocol Error Mask (DLPE)—R/WO.
0 = The corresponding error in the UES register (D28:F0/F1/F2/F3/F4/F5/F6/F7:144) is
enabled.
1 = The corresponding error in the UES register (D28:F0/F1/F2/F3/F4/F5/F6/F7:144) is
masked.
3:1 Reserved
0Training Error Mask (TE)—RO. Training Errors not supported
Bit Description
Bit Description
31:21 Reserved
20
Unsupported Request Error Severity (URE)—R/W.
0 = Error considered non-fatal. (Default)
1 = Error is fatal.
19 ECRC Error Severity (EE)—RO. ECRC is not supported.
18
Malformed TLP Severity (MT)—R/W.
0 = Error considered non-fatal.
1 = Error is fatal. (Default)
17
Receiver Overflow Severity (RO)—R/W.
0 = Error considered non-fatal.
1 = Error is fatal. (Default)
16 Reserved
15
Completion Abort Severity (CA)—R/W.
0 = Error considered non-fatal. (Default)
1 = Error is fatal.
14 Reserved
13 Flow Control Protocol Error Severity (FCPE)—RO. Flow Control Protocol Errors not
supported.
12
Poisoned TLP Severity (PT)—R/W.
0 = Error considered non-fatal. (Default)
1 = Error is fatal.
11:5 Reserved
4
Data Link Protocol Error Severity (DLPE)—R/W.
0 = Error considered non-fatal.
1 = Error is fatal. (Default)
3:1 Reserved
0 Training Error Severity (TE)—R/W. TE is not supported.
PCI Express* Configuration Registers
812 Datasheet
19.1.56 CES—Correctable Error Status Register
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7)
Address Offset: 110h113h Attribute: R/WC
Default Value: 00000000h Size: 32 bits
19.1.57 CEM—Correctable Error Mask Register
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7)
Address Offset: 114h117h Attribute: R/WO
Default Value: 00002000h Size: 32 bits
When set, the corresponding error in the CES register is masked, and the logged error
will cause no action. When cleared, the corresponding error is enabled.
Bit Description
31:14 Reserved
13
Advisory Non-Fatal Error Status (ANFES)—R/WC.
0 = Advisory Non-Fatal Error did not occur.
1 = Advisory Non-Fatal Error did occur.
12 Replay Timer Timeout Status (RTT)—R/WC. Indicates the replay timer timed out.
11:9 Reserved
8Replay Number Rollover Status (RNR)—R/WC. Indicates the replay number rolled
over.
7Bad DLLP Status (BD)—R/WC. Indicates a bad DLLP was received.
6Bad TLP Status (BT)—R/WC. Indicates a bad TLP was received.
5:1 Reserved
0Receiver Error Status (RE)—R/WC. Indicates a receiver error occurred.
Bit Description
31:14 Reserved
13
Advisory Non-Fatal Error Mask (ANFEM)—R/WO.
0 = Does not mask Advisory Non-Fatal errors.
1 = Masks Advisory Non-Fatal errors from (a) signaling ERR_COR to the device control
register and (b) updating the Uncorrectable Error Status register.
This register is set by default to enable compatibility with software that does not
comprehend Role-Based Error Reporting.
NOTE: The correctable error detected bit in device status register is set whenever the
Advisory Non-Fatal error is detected, independent of this mask bit.
12 Replay Timer Timeout Mask (RTT)—R/WO. Mask for replay timer timeout.
11:9 Reserved
8Replay Number Rollover Mask (RNR)—R/WO. Mask for replay number rollover.
7Bad DLLP Mask (BD)—R/WO. Mask for bad DLLP reception.
6Bad TLP Mask (BT)—R/WO. Mask for bad TLP reception.
5:1 Reserved
0Receiver Error Mask (RE)—R/WO. Mask for receiver errors.
Datasheet 813
PCI Express* Configuration Registers
19.1.58 AECC—Advanced Error Capabilities and Control Register
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7)
Address Offset: 118h11Bh Attribute: RO
Default Value: 00000000h Size: 32 bits
19.1.59 RES—Root Error Status Register
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7)
Address Offset: 130h133h Attribute: R/WC, RO
Default Value: 00000000h Size: 32 bits
Bit Description
31:9 Reserved
8 ECRC Check Enable (ECE)—RO. ECRC is not supported.
7 ECRC Check Capable (ECC)—RO. ECRC is not supported.
6 ECRC Generation Enable (EGE)—RO. ECRC is not supported.
5 ECRC Generation Capable (EGC)—RO. ECRC is not supported.
4:0 First Error Pointer (FEP)—RO. Identifies the bit position of the last error reported in the
Uncorrectable Error Status Register.
Bit Description
31:27 Advanced Error Interrupt Message Number (AEMN)—RO. There is only one error
interrupt allocated.
26:7 Reserved
6Fatal Error Messages Received (FEMR)—RO. Set when one or more Fatal
Uncorrectable Error Messages have been received.
5Non-Fatal Error Messages Received (NFEMR)—RO. Set when one or more Non-
Fatal Uncorrectable error messages have been received
4First Uncorrectable Fatal (FUF)—RO. Set when the first Uncorrectable Error
message received is for a fatal error.
3Multiple ERR_FATAL/NONFATAL Received (MENR)—RO. For the PCH, only one
error will be captured.
2
ERR_FATAL/NONFATAL Received (ENR)—R/WC.
0 = No error message received.
1 = Either a fatal or a non-fatal error message is received.
1Multiple ERR_COR Received (MCR)—RO. For the PCH, only one error will be
captured.
0
ERR_COR Received (CR)—R/WC.
0 = No error message received.
1 = A correctable error message is received.
PCI Express* Configuration Registers
814 Datasheet
19.1.60 PECR2—PCI Express* Configuration Register 2
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7)
Address Offset: 300–303h Attribute: R/W
Default Value: 60005007h Size: 32 bits
19.1.61 PEETM—PCI Express* Extended Test Mode Register
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7)
Address Offset: 324h Attribute: RO
Default Value: See Description Size: 8 bits
19.1.62 PEC1—PCI Express* Configuration Register 1
(PCI Express*—D28:F0/F1/F2/F3/F4/F5/F6/F7)
Address Offset: 330 Attribute: RO, R/W
Default Value: 14000016h Size: 32 bits
§ §
Bit Description
31:20 Reserved
21 PECR2 Field 1—R/W. BIOS must set this bit to 1b.
20:0 Reserved
Bit Description
7:3 Reserved
2
Scrambler Bypass Mode (BAU)—R/W.
0 = Normal operation. Scrambler and descrambler are used.
1 = Bypasses the data scrambler in the transmit direction and the data de-scrambler in
the receive direction.
NOTE: This functionality intended for debug/testing only.
NOTE: If bypassing scrambler with the PCH root port 1 in x4 configuration, each PCH
root port must have this bit set.
1:0 Reserved
Bit Description
31:8 Reserved
7:0 PEC1 Field 1—R/W. BIOS must program this field to 40h.
Datasheet 815
High Precision Event Timer Registers
20 High Precision Event Timer
Registers
The timer registers are memory-mapped in a non-indexed scheme. This allows the
processor to directly access each register without having to use an index register. The
timer register space is 1024 bytes. The registers are generally aligned on 64-bit
boundaries to simplify implementation with IA64 processors. There are four possible
memory address ranges beginning at 1) FED0_0000h, 2) FED0_1000h, 3)
FED0_2000h, 4) FED0_3000h. The choice of address range will be selected by
configuration bits in the High Precision Timer Configuration Register (Chipset Config
Registers:Offset 3404h).
Behavioral Rules:
1. Software must not attempt to read or write across register boundaries. For
example, a 32-bit access should be to offset x0h, x4h, x8h, or xCh. 32-bit accesses
should not be to 01h, 02h, 03h, 05h, 06h, 07h, 09h, 0Ah, 0Bh, 0Dh, 0Eh, or 0Fh.
Any accesses to these offsets will result in an unexpected behavior, and may result
in a master abort. However, these accesses should not result in system hangs. 64-
bit accesses can only be to x0h and must not cross 64-bit boundaries.
2. Software should not write to read-only registers.
3. Software should not expect any particular or consistent value when reading
reserved registers or bits.
20.1 Memory Mapped Registers
Table 20-1. Memory-Mapped Registers (Sheet 1 of 2)
Offset Mnemonic Register Default Type
000–007h GCAP_ID General Capabilities and Identification 0429B17F8
086A701h RO
008–00Fh Reserved
010–017h GEN_CONF General Configuration 00000000
00000000h R/W
018–01Fh Reserved
020–027h GINTR_STA General Interrupt Status 00000000
00000000h
R/WC, R/
W
028–0EFh Reserved
0F0–0F7h MAIN_CNT Main Counter Value N/A R/W
0F8–0FFh Reserved
100–107h TIM0_CONF Timer 0 Configuration and Capabilities N/A R/W, RO
108–10Fh TIM0_COMP Timer 0 Comparator Value N/A R/W
110–11Fh Reserved
120–127h TIM1_CONF Timer 1 Configuration and Capabilities N/A R/W, RO
128–12Fh TIM1_COMP Timer 1 Comparator Value N/A R/W
130–13Fh Reserved
High Precision Event Timer Registers
816 Datasheet
NOTES:
1. Reads to reserved registers or bits will return a value of 0.
2. Software must not attempt locks to the memory-mapped I/O ranges for High Precision
Event Timers. If attempted, the lock is not honored, which means potential deadlock
conditions may occur.
140–147h TIM2_CONF Timer 2 Configuration and Capabilities N/A R/W, RO
148–14Fh TIM2_COMP Timer 2 Comparator Value N/A R/W
150–15Fh Reserved
160–167h TIM3_CONG Timer 3 Configuration and Capabilities N/A R/W, RO
168–16Fh TIM3_COMP Timer 3 Comparator Value N/A R/W
180–187h TIM4_CONG Timer 4 Configuration and Capabilities N/A R/W, RO
188–18Fh TIM4_COMP Timer 4 Comparator Value N/A R/W
190–19Fh — Reserved
1A0–1A7h TIM5_CONG Timer 5 Configuration and Capabilities N/A R/W, RO
1A8–1AFh TIM5_COMP Timer 5 Comparator Value N/A R/W
1B0–1BFh — Reserved
1C0–1C7h TIM6_CONG Timer 6 Configuration and Capabilities N/A R/W, RO
1C8–1CFh TIM6_COMP Timer 6 Comparator Value N/A R/W
1D0–1DFh — Reserved
1E0–1E7h TIM7_CONG Timer 7 Configuration and Capabilities N/A R/W, RO
1E8–1EFh TIM7_COMP Timer 7 Comparator Value N/A R/W
1F0–19Fh — Reserved
200–3FFh — Reserved
Table 20-1. Memory-Mapped Registers (Sheet 2 of 2)
Offset Mnemonic Register Default Type
Datasheet 817
High Precision Event Timer Registers
20.1.1 GCAP_ID—General Capabilities and Identification Register
Address Offset: 00h Attribute: RO
Default Value: 0429B17F8086A701h Size: 64 bits
20.1.2 GEN_CONF—General Configuration Register
Address Offset: 010h Attribute: R/W
Default Value: 00000000 00000000h Size: 64 bits
Bit Description
63:32
Main Counter Tick Period (COUNTER_CLK_PER_CAP)—RO. This field indicates
the period at which the counter increments in femptoseconds (10^-15 seconds). This
will return 0429B17F when read. This indicates a period of 69841279 fs
(69.841279 ns).
31:16 Vendor ID Capability (VENDOR_ID_CAP)—RO. This is a 16-bit value assigned to
Intel.
15 Legacy Replacement Rout Capable (LEG_RT_CAP)—RO. Hardwired to 1. Legacy
Replacement Interrupt Rout option is supported.
14 Reserved. This bit returns 0 when read.
13 Counter Size Capability (COUNT_SIZE_CAP)—RO. Hardwired to 1. Counter is
64-bit wide.
12:8
Number of Timer Capability (NUM_TIM_CAP)—RO. This field indicates the
number of timers in this block.
07h = Eight timers.
7:0 Revision Identification (REV_ID)—RO. This indicates which revision of the
function is implemented. Default value will be 01h.
Bit Description
63:2 Reserved. These bits return 0 when read.
1
Legacy Replacement Rout (LEG_RT_CNF)—R/W. If the ENABLE_CNF bit and the
LEG_RT_CNF bit are both set, then the interrupts will be routed as follows:
Timer 0 is routed to IRQ0 in 8259 or IRQ2 in the I/O APIC
Timer 1 is routed to IRQ8 in 8259 or IRQ8 in the I/O APIC
Timer 2-n is routed as per the routing in the timer n config registers.
If the Legacy Replacement Rout bit is set, the individual routing bits for Timers 0
and 1 (APIC) will have no impact.
If the Legacy Replacement Rout bit is not set, the individual routing bits for each of
the timers are used.
This bit will default to 0. BIOS can set it to 1 to enable the legacy replacement
routing, or 0 to disable the legacy replacement routing.
0
Overall Enable (ENABLE_CNF)—R/W. This bit must be set to enable any of the
timers to generate interrupts. If this bit is 0, then the main counter will halt (will not
increment) and no interrupts will be caused by any of these timers. For level-triggered
interrupts, if an interrupt is pending when the ENABLE_CNF bit is changed from 1 to 0,
the interrupt status indications (in the various Txx_INT_STS bits) will not be cleared.
Software must write to the Txx_INT_STS bits to clear the interrupts.
NOTE: This bit will default to 0. BIOS can set it to 1 or 0.
High Precision Event Timer Registers
818 Datasheet
20.1.3 GINTR_STA—General Interrupt Status Register
Address Offset: 020h Attribute: R/W, R/WC
Default Value: 00000000 00000000h Size: 64 bits
.
20.1.4 MAIN_CNT—Main Counter Value Register
Address Offset: 0F0h Attribute: R/W
Default Value: N/A Size: 64 bits
.
Bit Description
63:8 Reserved. These bits will return 0 when read.
7 Timer 7Interrupt Active (T07_INT_STS)—R/W. Same functionality as Timer 0.
6 Timer 6Interrupt Active (T06_INT_STS)—R/W. Same functionality as Timer 0.
5Timer 5Interrupt Active (T05_INT_STS)—R/W. Same functionality as Timer 0.
4 Timer 4Interrupt Active (T04_INT_STS)—R/W. Same functionality as Timer 0.
3Timer 3Interrupt Active (T03_INT_STS)—R/W. Same functionality as Timer 0.
2Timer 2 Interrupt Active (T02_INT_STS)—R/W. Same functionality as Timer 0.
1Timer 1 Interrupt Active (T01_INT_STS)—R/W. Same functionality as Timer 0.
0
Timer 0 Interrupt Active (T00_INT_STS)—R/WC. The functionality of this bit
depends on whether the edge or level-triggered mode is used for this timer.
(default = 0)
If set to level-triggered mode:
This bit will be set by hardware if the corresponding timer interrupt is active. Once
the bit is set, it can be cleared by software writing a 1 to the same bit position.
Writes of 0 to this bit will have no effect.
If set to edge-triggered mode:
This bit should be ignored by software. Software should always write 0 to this bit.
NOTE: Defaults to 0. In edge triggered mode, this bit will always read as 0 and writes
will have no effect.
Bit Description
63:0
Counter Value (COUNTER_VAL[63:0])—R/W. Reads return the current value of the
counter. Writes load the new value to the counter.
NOTES:
1. Writes to this register should only be done while the counter is halted.
2. Reads to this register return the current value of the main counter.
3. 32-bit counters will always return 0 for the upper 32-bits of this register.
4. If 32-bit software attempts to read a 64-bit counter, it should first halt the counter.
Since this delays the interrupts for all of the timers, this should be done only if the
consequences are understood. It is strongly recommended that 32-bit software only
operate the timer in 32-bit mode.
5. Reads to this register are monotonic. No two consecutive reads return the same
value. The second of two reads always returns a larger value (unless the timer has
rolled over to 0).
Datasheet 819
High Precision Event Timer Registers
20.1.5 TIMn_CONF—Timer n Configuration and Capabilities
Register
Address Offset: Timer 0: 100–107h, Attribute: RO, R/W
Timer 1: 120–127h,
Timer 2: 140–147h,
Timer 3: 160–167h,
Timer 4: 180–187h,
Timer 5: 1A0–1A7h,
Timer 6: 1C0–1C7h,
Timer 7: 1E0–1E7h,
Default Value: N/A Size: 64 bit
Note: The letter n can be 0, 1, 2, 3, 4, 5, 6, or 7 referring to Timer 0, 1, 2, 3, 4, 5, 6, or 7.
Bit Description
63:56 Reserved. These bits will return 0 when read.
55:52,
43
Timer Interrupt Rout Capability (TIMERn_INT_ROUT_CAP)—RO.
Timer 0, 1: Bits 52, 53, 54, and 55 in this field (corresponding to IRQ 20, 21, 22,
and 23) have a value of 1. Writes will have no effect.
Timer 2: Bits 43, 52, 53, 54, and 55 in this field (corresponding to IRQ 11, 20,
21, 22, and 23) have a value of 1. Writes will have no effect.
Timer 3: Bits 44, 52, 53, 54, and 55 in this field (corresponding to IRQ 11, 20,
21, 22, and 23) have a value of 1. Writes will have no effect.
Timer 4, 5, 6, 7: This field is always 0 as interrupts from these timers can only be
delivered using direct FSB interrupt messages.
NOTE: If IRQ 11 is used for HPET #2, software should ensure IRQ 11 is not shared
with any other devices to ensure the proper operation of HPET #2.
NOTE: If IRQ 12 is used for HPET #3, software should ensure IRQ 12 is not shared
with any other devices to ensure the proper operation of HPET #3.
51:45,
42:14 Reserved. These bits return 0 when read.
13:9
Interrupt Rout (TIMERn_INT_ROUT_CNF)—R/W. This 5-bit field indicates the
routing for the interrupt to the 8259 or I/O (x) APIC. Software writes to this field to
select which interrupt in the 8259 or I/O (x) will be used for this timer’s interrupt. If
the value is not supported by this particular timer, then the value read back will not
match what is written. The software must only write valid values.
Timer 4, 5, 6, 7: This field is Read-only and reads will return 0.
NOTES:
1. If the interrupt is handled using the 8259, only interrupts 0–15 are applicable
and valid. Software must not program any value other than 0–15 in this field.
2. If the Legacy Replacement Rout bit is set, then Timers 0 and 1 will have a
different routing, and this bit field has no effect for those two timers.
3. Timer 0,1: Software is responsible to make sure it programs a valid value (20,
21, 22, or 23) for this field. The PCH logic does not check the validity of the
value written.
4. Timer 2: Software is responsible to make sure it programs a valid value (11,
20, 21, 22, or 23) for this field. The PCH logic does not check the validity of the
value written.
5. Timer 3: Software is responsible to make sure it programs a valid value (12,
20, 21, 22, or 23) for this field. The PCH logic does not check the validity of the
value written.
High Precision Event Timer Registers
820 Datasheet
NOTE: Reads or writes to unimplemented timers should not be attempted. Read from any
unimplemented registers will return an undetermined value.
8
Timer n 32-bit Mode (TIMERn_32MODE_CNF)—R/W or RO. Software can set this
bit to force a 64-bit timer to behave as a 32-bit timer.
Timer 0: Bit is read/write (default to 0). 0 = 64 bit; 1 = 32 bit
Timers 1, 2, 3, 4, 5, 6, 7: Hardwired to 0. Writes have no effect (since these two
timers are 32-bits).
NOTE: When this bit is set to 1, the hardware counter will do a 32-bit operation on
comparator match and rollovers; thus, the upper 32-bit of the Timer 0
Comparator Value register is ignored. The upper 32-bit of the main counter is
not involved in any rollover from lower 32-bit of the main counter and
becomes all zeros.
7 Reserved. This bit returns 0 when read.
6
Timer n Value Set (TIMERn_VAL_SET_CNF)—R/W. Software uses this bit only for
Timer 0 if it has been set to periodic mode. By writing this bit to a 1, the software is
then allowed to directly set the timer’s accumulator. Software does not have to write
this bit back to 1 (it automatically clears).
Software should not write a 1 to this bit position if the timer is set to non-periodic
mode.
NOTE: This bit will return 0 when read. Writes will only have an effect for Timer 0 if it
is set to periodic mode. Writes will have no effect for Timers 1, 2, 3, 4, 5, 6,
7.
5
Timer n Size (TIMERn_SIZE_CAP)—RO. This read only field indicates the size of
the timer.
Timer 0: Value is 1 (64-bits).
Timers 1, 2, 3, 4, 5, 6, 7.: Value is 0 (32-bits).
4
Periodic Interrupt Capable (TIMERn_PER_INT_CAP)—RO. If this bit is 1, the
hardware supports a periodic mode for this timer’s interrupt.
Timer 0: Hardwired to 1 (supports the periodic interrupt).
Timers 1, 2, 3, 4, 5, 6, 7.: Hardwired to 0 (does not support periodic interrupt).
3
Timer n Type (TIMERn_TYPE_CNF)—R/W or RO.
Timer 0: Bit is read/write. 0 = Disable timer to generate periodic interrupt; 1 =
Enable timer to generate a periodic interrupt.
Timers 1, 2, 3, 4, 5, 6, 7.: Hardwired to 0. Writes have no affect.
2
Timer n Interrupt Enable (TIMERn_INT_ENB_CNF)R/W. This bit must be set
to enable timer n to cause an interrupt when it times out.
0 = Disable (Default). The timer can still count and generate appropriate status bits,
but will not cause an interrupt.
1 = Enable.
1
Timer Interrupt Type (TIMERn_INT_TYPE_CNF)—R/W.
0 = The timer interrupt is edge triggered. This means that an edge-type interrupt is
generated. If another interrupt occurs, another edge will be generated.
1 = The timer interrupt is level triggered. This means that a level-triggered interrupt
is generated. The interrupt will be held active until it is cleared by writing to the
bit in the General Interrupt Status Register. If another interrupt occurs before the
interrupt is cleared, the interrupt will remain active.
Timer 4, 5, 6, 7: This bit is Read-Only, and will return 0 when read
0 Reserved. These bits will return 0 when read.
Bit Description
Datasheet 821
High Precision Event Timer Registers
20.1.6 TIMn_COMP—Timer n Comparator Value Register
Address Offset: Timer 0: 108h–10Fh,
Timer 1: 128h–12Fh,
Timer 2: 148h–14Fh,
Timer 3: 168h–16Fh,
Timer 4: 188h – 18Fh,
Timer 5: 1A8h – 1AFh,
Timer 6: 1C8h – 1CFh,
Timer 7: 1E8h – 1EFh
Attribute: R/W
Default Value: N/A Size: 64 bit
§ §
Bit Description
63:0
Timer Compare Value—R/W. Reads to this register return the current value of the
comparator
Timers 0, 1, 2, 3 4, 5, 6, 7 (4, 5, 6, 7) are configured to non-periodic mode:
Writes to this register load the value against which the main counter should be
compared for this timer.
When the main counter equals the value last written to this register, the
corresponding interrupt can be generated (if so enabled).
The value in this register does not change based on the interrupt being
generated.
Timer 0 is configured to periodic mode:
When the main counter equals the value last written to this register, the
corresponding interrupt can be generated (if so enabled).
After the main counter equals the value in this register, the value in this register
is increased by the value last written to the register.
For example, if the value written to the register is 00000123h, then
1. An interrupt will be generated when the main counter reaches 00000123h.
2. The value in this register will then be adjusted by the hardware to 00000246h.
3. Another interrupt will be generated when the main counter reaches 00000246h
4. The value in this register will then be adjusted by the hardware to 00000369h
As each periodic interrupt occurs, the value in this register will increment. When
the incremented value is greater than the maximum value possible for this
register (FFFFFFFFh for a 32-bit timer or FFFFFFFFFFFFFFFFh for a 64-bit timer),
the value will wrap around through 0. For example, if the current value in a 32-bit
timer is FFFF0000h and the last value written to this register is 20000, then after
the next interrupt the value will change to 00010000h
Default value for each timer is all 1s for the bits that are implemented. For example,
a 32-bit timer has a default value of 00000000FFFFFFFFh. A 64-bit timer has a
default value of FFFFFFFFFFFFFFFFh.
High Precision Event Timer Registers
822 Datasheet
Datasheet 823
Serial Peripheral Interface (SPI)
21 Serial Peripheral Interface
(SPI)
The Serial Peripheral Interface resides in memory mapped space. This function contains
registers that allow for the setup and programming of devices that reside on the SPI
interface.
Note: All registers in this function (including memory-mapped registers) must be addressable
in byte, word, and DWord quantities. The software must always make register accesses
on natural boundaries (that is, DWord accesses must be on DWord boundaries; word
accesses on word boundaries, etc.) In addition, the memory-mapped register space
must not be accessed with the LOCK semantic exclusive-access mechanism. If software
attempts exclusive-access mechanisms to the SPI memory-mapped space, the results
are undefined.
21.1 Serial Peripheral Interface Memory Mapped
Configuration Registers
The SPI Host Interface registers are memory-mapped in the RCRB (Root Complex
Register Block) Chipset Register Space with a base address (SPIBAR) of 3800h and are
located within the range of 3800h to 39FFh. The address for RCRB can be found in
RCBA Register see Section 13.1.38. The individual registers are then accessible at
SPIBAR + Offset as indicated in the following table.
These memory mapped registers must be accessed in byte, word, or DWord quantities.
Table 21-1. Serial Peripheral Interface (SPI) Register Address Map
(SPI Memory Mapped Configuration Registers) (Sheet 1 of 2)
SPIBAR +
Offset Mnemonic Register Name Default
00h–03h BFPR BIOS Flash Primary Region 00000000h
04h–05h HSFSTS Hardware Sequencing Flash Status 0000h
06h–07h HSFCTL Hardware Sequencing Flash Control 0000h
08h–0Bh FADDR Flash Address 00000000h
0Ch–0Fh Reserved Reserved 00000000h
10h–13h FDATA0 Flash Data 0 00000000h
14h–4Fh FDATAN Flash Data N 00000000h
50h–53h FRACC Flash Region Access Permissions 00000202h
54h–57h FREG0 Flash Region 0 00000000h
58h–5Bh FREG1 Flash Region 1 00000000h
5Ch–5F FREG2 Flash Region 2 00000000h
60h–63h FREG3 Flash Region 3 00000000h
64h–67h FREG3 Flash Region 4 00000000h
67h–73h Reserved Reserved for Future Flash Regions
74h–77h FPR0 Flash Protected Range 0 00000000h
Serial Peripheral Interface (SPI)
824 Datasheet
21.1.1 BFPR –BIOS Flash Primary Region Register
(SPI Memory Mapped Configuration Registers)
Memory Address: SPIBAR + 00h Attribute: RO
Default Value: 00000000h Size: 32 bits
Note: This register is only applicable when SPI device is in descriptor mode.
78h–7Bh FPR1 Flash Protected Range 1 00000000h
7Ch–7Fh FPR2 Flash Protected Range 2 00000000h
80–83h FPR3 Flash Protected Range 3 00000000h
84h–87h FPR4 Flash Protected Range 4 00000000h
88h–8Fh Reserved
90h SSFSTS Software Sequencing Flash Status 00h
91h–93h SSFCTL Software Sequencing Flash Control 0000h
94h–95h PREOP Prefix Opcode Configuration 0000h
96h–97h OPTYPE Opcode Type Configuration 0000h
98h–9Fh OPMENU Opcode Menu Configuration 00000000
00000000h
A0h BBAR BIOS Base Address Configuration 00000000h
B0h–B3h FDOC Flash Descriptor Observability Control 00000000h
B4h–B7h FDOD Flash Descriptor Observability Data 00000000h
B8h–C3h Reserved
C0h–C3h AFC Additional Flash Control 00000000h
C4–C7h LVSCC Host Lower Vendor Specific Component
Capabilities 00000000h
C8–C11h UVSCC Host Upper Vendor Specific Component
Capabilities 00000000h
D0–D3h FPB Flash Partition Boundary 00000000h
Table 21-1. Serial Peripheral Interface (SPI) Register Address Map
(SPI Memory Mapped Configuration Registers) (Sheet 2 of 2)
SPIBAR +
Offset Mnemonic Register Name Default
Bit Description
31:29 Reserved
28:16
BIOS Flash Primary Region Limit (PRL)—RO. This specifies address bits 24:12 for
the Primary Region Limit.
The value in this register loaded from the contents in the Flash
Descriptor.FLREG1.Region Limit
15:13 Reserved
12:0
BIOS Flash Primary Region Base (PRB)—RO. This specifies address bits 24:12 for
the Primary Region Base
The value in this register is loaded from the contents in the Flash
Descriptor.FLREG1.Region Base
Datasheet 825
Serial Peripheral Interface (SPI)
21.1.2 HSFS—Hardware Sequencing Flash Status Register
(SPI Memory Mapped Configuration Registers)
Memory Address: SPIBAR + 04h Attribute: RO, R/WC, R/W
Default Value: 0000h Size: 16 bits
Bit Description
15
Flash Configuration Lock-Down (FLOCKDN)—R/W/L. When set to 1, those Flash
Program Registers that are locked down by this FLOCKDN bit cannot be written. Once
set to 1, this bit can only be cleared by a hardware reset due to a global reset or host
partition reset in an Intel® ME enabled system.
14
Flash Descriptor Valid (FDV)—RO. This bit is set to a 1 if the Flash Controller read
the correct Flash Descriptor Signature.
If the Flash Descriptor Valid bit is not 1, software cannot use the Hardware Sequencing
registers, but must use the software sequencing registers. Any attempt to use the
Hardware Sequencing registers will result in the FCERR bit being set.
13
Flash Descriptor Override Pin Strap Status (FDOPSS)—RO. This bit reflects the
value the Flash Descriptor Override Pin-Strap.
0 = The Flash Descriptor Override strap is set
1 = No override
12:6 Reserved
5
SPI Cycle In Progress (SCIP)—RO. Hardware sets this bit when software sets the
Flash Cycle Go (FGO) bit in the Hardware Sequencing Flash Control register. This bit
remains set until the cycle completes on the SPI interface. Hardware automatically sets
and clears this bit so that software can determine when read data is valid and/or when
it is safe to begin programming the next command. Software must only program the
next command when this bit is 0.
NOTE: This field is only applicable when in Descriptor mode and Hardware sequencing
is being used.
4:3
Block/Sector Erase Size (BERASE)—RO. This field identifies the erasable sector size
for all Flash components.
Valid Bit Settings:
00 = 256 Byte
01 = 4 K Byte
10 = 8 K Byte
11 = 64 K Byte
If the FLA is less than FPBA then this field reflects the value in the LVSCC.LBES register.
If the FLA is greater or equal to FPBA then this field reflects the value in the
UVSCC.UBES register.
NOTE: This field is only applicable when in Descriptor mode and Hardware sequencing
is being used.
2
Access Error Log (AEL)—R/W/C. Hardware sets this bit to a 1 when an attempt was
made to access the BIOS region using the direct access method or an access to the
BIOS Program Registers that violated the security restrictions. This bit is simply a log of
an access security violation. This bit is cleared by software writing a 1.
NOTE: This field is only applicable when in Descriptor mode and Hardware sequencing
is being used.
Serial Peripheral Interface (SPI)
826 Datasheet
1
Flash Cycle Error (FCERR)—R/W/C. Hardware sets this bit to 1 when an program
register access is blocked to the FLASH due to one of the protection policies or when
any of the programmed cycle registers is written while a programmed access is already
in progress. This bit remains asserted until cleared by software writing a 1 or until
hardware reset occurs due to a global reset or host partition reset in an Intel® ME
enabled system. Software must clear this bit before setting the FLASH Cycle GO bit in
this register.
NOTE: This field is only applicable when in Descriptor mode and Hardware sequencing
is being used.
0
Flash Cycle Done (FDONE)—R/W/C. The PCH sets this bit to 1 when the SPI Cycle
completes after software previously set the FGO bit. This bit remains asserted until
cleared by software writing a 1 or hardware reset due to a global reset or host partition
reset in an Intel® ME enabled system. When this bit is set and the SPI SMI# Enable bit
is set, an internal signal is asserted to the SMI# generation block. Software must make
sure this bit is cleared prior to enabling the SPI SMI# assertion for a new programmed
access.
NOTE: This field is only applicable when in Descriptor mode and Hardware sequencing
is being used.
Bit Description
Datasheet 827
Serial Peripheral Interface (SPI)
21.1.3 HSFC—Hardware Sequencing Flash Control Register
(SPI Memory Mapped Configuration Registers)
Memory Address: SPIBAR + 06h Attribute: R/W, R/WS
Default Value: 0000h Size: 16 bits
Note: This register is only applicable when SPI device is in descriptor mode.
21.1.4 FADDR—Flash Address Register
(SPI Memory Mapped Configuration Registers)
Memory Address: SPIBAR + 08h Attribute: R/W
Default Value: 00000000h Size: 32 bits
Bit Description
15 Flash SPI SMI# Enable (FSMIE)—R/W. When set to 1, the SPI asserts an SMI#
request whenever the Flash Cycle Done bit is 1.
14 Reserved
13:8
Flash Data Byte Count (FDBC)—R/W. This field specifies the number of bytes to shift
in or out during the data portion of the SPI cycle. The contents of this register are 0s
based with 0b representing 1 byte and 111111b representing 64 bytes. The number of
bytes transferred is the value of this field plus 1.
This field is ignored for the Block Erase command.
7:3 Reserved
2:1
FLASH Cycle (FCYCLE)—R/W. This field defines the Flash SPI cycle type generated to
the FLASH when the FGO bit is set as defined below:
00 = Read (1 up to 64 bytes by setting FDBC)
01 = Reserved
10 = Write (1 up to 64 bytes by setting FDBC)
11 = Block Erase
0
Flash Cycle Go (FGO)—R/W/S. A write to this register with a 1 in this bit initiates a
request to the Flash SPI Arbiter to start a cycle. This register is cleared by hardware
when the cycle is granted by the SPI arbiter to run the cycle on the SPI bus. When the
cycle is complete, the FDONE bit is set.
Software is forbidden to write to any register in the HSFLCTL register between the FGO
bit getting set and the FDONE bit being cleared. Any attempt to violate this rule will be
ignored by hardware.
Hardware allows other bits in this register to be programmed for the same transaction
when writing this bit to 1. This saves an additional memory write.
This bit always returns 0 on reads.
Bit Description
31:25 Reserved
24:0
Flash Linear Address (FLA)—R/W. The FLA is the starting byte linear address of a
SPI Read or Write cycle or an address within a Block for the Block Erase command. The
Flash Linear Address must fall within a region for which BIOS has access permissions.
Hardware must convert the FLA into a Flash Physical Address (FPA) before running this
cycle on the SPI bus.
Serial Peripheral Interface (SPI)
828 Datasheet
21.1.5 FDATA0—Flash Data 0 Register
(SPI Memory Mapped Configuration Registers)
Memory Address: SPIBAR + 10h Attribute: R/W
Default Value: 00000000h Size: 32 bits
21.1.6 FDATAN—Flash Data [N] Register
(SPI Memory Mapped Configuration Registers)
Memory Address: SPIBAR + 14h Attribute: R/W
SPIBAR + 18h
SPIBAR + 1Ch
SPIBAR + 20h
SPIBAR + 24h
SPIBAR + 28h
SPIBAR + 2Ch
SPIBAR + 30h
SPIBAR + 34h
SPIBAR + 38h
SPIBAR + 3Ch
SPIBAR + 40h
SPIBAR + 44h
SPIBAR + 48h
SPIBAR + 4Ch
Default Value: 00000000h Size: 32 bits
Bit Description
31:0
Flash Data 0 (FD0)—R/W. This field is shifted out as the SPI Data on the Master-Out
Slave-In Data pin during the data portion of the SPI cycle.
This register also shifts in the data from the Master-In Slave-Out pin into this register
during the data portion of the SPI cycle.
The data is always shifted starting with the least significant byte, msb to lsb, followed
by the next least significant byte, msb to lsb, etc. Specifically, the shift order on SPI in
terms of bits within this register is: 7-6-5-4-3-2-1-0-15-14-13-…8-23-22-…16-31…24
Bit 24 is the last bit shifted out/in. There are no alignment assumptions; byte 0 always
represents the value specified by the cycle address.
Note that the data in this register may be modified by the hardware during any
programmed SPI transaction. Direct Memory Reads do not modify the contents of this
register.
Bit Description
31:0 Flash Data N (FD[N])—R/W. Similar definition as Flash Data 0. However, this register
does not begin shifting until FD[N-1] has completely shifted in/out.—R/W.
Datasheet 829
Serial Peripheral Interface (SPI)
21.1.7 FRAP—Flash Regions Access Permissions Register
(SPI Memory Mapped Configuration Registers)
Memory Address: SPIBAR + 50h Attribute: RO, R/W
Default Value: 00000202h Size: 32 bits
Note: This register is only applicable when SPI device is in descriptor mode.
Bit Description
31:24
BIOS Master Write Access Grant (BMWAG)—R/W. Each bit [31:29] corresponds to
Master[7:0]. BIOS can grant one or more masters write access to the BIOS region 1
overriding the permissions in the Flash Descriptor.
Master[1] is Host processor/BIOS, Master[2] is Intel® Management Engine, Master[3]
is Host processor/GbE. Master[0] and Master[7:4] are reserved.
The contents of this register are locked by the FLOCKDN bit.
23:16
BIOS Master Read Access Grant (BMRAG)—R/W. Each bit [28:16] corresponds to
Master[7:0]. BIOS can grant one or more masters read access to the BIOS region 1
overriding the read permissions in the Flash Descriptor.
Master[1] is Host processor/BIOS, Master[2] is Intel® Management Engine, Master[3]
is Host processor/GbE. Master[0] and Master[7:4] are reserved.
The contents of this register are locked by the FLOCKDN bit
15:8
BIOS Region Write Access (BRWA)—RO. Each bit [15:8] corresponds to Regions
[7:0]. If the bit is set, this master can erase and write that particular region through
register accesses.
The contents of this register are that of the Flash Descriptor. Flash Master 1 Master
Region Write Access OR a particular master has granted BIOS write permissions in their
Master Write Access Grant register or the Flash Descriptor Security Override strap is
set.
7:0
BIOS Region Read Access (BRRA)—RO. Each bit [7:0] corresponds to Regions
[7:0]. If the bit is set, this master can read that particular region through register
accesses.
The contents of this register are that of the Flash Descriptor.Flash Master 1.Master
Region Write Access OR a particular master has granted BIOS read permissions in their
Master Read Access Grant register or the Flash Descriptor Security Override strap is
set.
Serial Peripheral Interface (SPI)
830 Datasheet
21.1.8 FREG0—Flash Region 0 (Flash Descriptor) Register
(SPI Memory Mapped Configuration Registers)
Memory Address: SPIBAR + 54h Attribute: RO
Default Value: 00000000h Size: 32 bits
Note: This register is only applicable when SPI device is in descriptor mode.
21.1.9 FREG1—Flash Region 1 (BIOS Descriptor) Register
(SPI Memory Mapped Configuration Registers)
Memory Address: SPIBAR + 58h Attribute: RO
Default Value: 00000000h Size: 32 bits
Note: This register is only applicable when SPI device is in descriptor mode.
Bit Description
31:29 Reserved
28:16
Region Limit (RL)—RO. This specifies address bits 24:12 for the Region 0 Limit.
The value in this register is loaded from the contents in the Flash
Descriptor.FLREG0.Region Limit
15:13 Reserved
12:0
Region Base (RB) / Flash Descriptor Base Address Region (FDBAR)—RO. This
specifies address bits 24:12 for the Region 0 Base
The value in this register is loaded from the contents in the Flash
Descriptor.FLREG0.Region Base
Bit Description
31:29 Reserved
28:16
Region Limit (RL)—RO. This specifies address bits 24:12 for the Region 1 Limit.
The value in this register is loaded from the contents in the Flash
Descriptor.FLREG1.Region Limit
15:13 Reserved
12:0
Region Base (RB)—RO. This specifies address bits 24:12 for the Region 1 Base
The value in this register is loaded from the contents in the Flash
Descriptor.FLREG1.Region Base
Datasheet 831
Serial Peripheral Interface (SPI)
21.1.10 FREG2—Flash Region 2 (Intel® ME) Register
(SPI Memory Mapped Configuration Registers)
Memory Address: SPIBAR + 5Ch Attribute: RO
Default Value: 00000000h Size: 32 bits
Note: This register is only applicable when SPI device is in descriptor mode.
21.1.11 FREG3—Flash Region 3 (GbE) Register
(SPI Memory Mapped Configuration Registers)
Memory Address: SPIBAR + 60h Attribute: RO
Default Value: 00000000h Size: 32 bits
Note: This register is only applicable when SPI device is in descriptor mode.
Bit Description
31:29 Reserved
28:16
Region Limit (RL)—RO. This specifies address bits 24:12 for the Region 2 Limit.
The value in this register is loaded from the contents in the Flash
Descriptor.FLREG2.Region Limit
15:13 Reserved
12:0
Region Base (RB)—RO. This specifies address bits 24:12 for the Region 2 Base
The value in this register is loaded from the contents in the Flash
Descriptor.FLREG2.Region Base
Bit Description
31:29 Reserved
28:16
Region Limit (RL)—RO. This specifies address bits 24:12 for the Region 3 Limit.
The value in this register is loaded from the contents in the Flash
Descriptor.FLREG3.Region Limit
15:13 Reserved
12:0
Region Base (RB)—RO. This specifies address bits 24:12 for the Region 3 Base
The value in this register is loaded from the contents in the Flash
Descriptor.FLREG3.Region Base
Serial Peripheral Interface (SPI)
832 Datasheet
21.1.12 FREG4—Flash Region 4 (Platform Data) Register
(SPI Memory Mapped Configuration Registers)
Memory Address: SPIBAR + 64h Attribute: RO
Default Value: 00000000h Size: 32 bits
Note: This register is only applicable when SPI device is in descriptor mode.
21.1.13 PR0—Protected Range 0 Register
(SPI Memory Mapped Configuration Registers)
Memory Address: SPIBAR + 74h Attribute: R/W
Default Value: 00000000h Size: 32 bits
Note: This register can not be written when the FLOCKDN bit is set to 1.
Bit Description
31:29 Reserved
28:16
Region Limit (RL)—RO. This specifies address bits 24:12 for the Region 4 Limit.
The value in this register is loaded from the contents in the Flash
Descriptor.FLREG4.Region Limit
15:13 Reserved
12:0
Region Base (RB)—RO. This specifies address bits 24:12 for the Region 4 Base
The value in this register is loaded from the contents in the Flash
Descriptor.FLREG4.Region Base
Bit Description
31
Write Protection Enable—R/W. When set, this bit indicates that the Base and Limit
fields in this register are valid and that writes and erases directed to addresses between
them (inclusive) must be blocked by hardware. The base and limit fields are ignored
when this bit is cleared.
30:29 Reserved
28:16
Protected Range LimitR/W. This field corresponds to FLA address bits 24:12 and
specifies the upper limit of the protected range. Address bits 11:0 are assumed to be
FFFh for the limit comparison. Any address greater than the value programmed in this
field is unaffected by this protected range.
15
Read Protection Enable—R/W. When set, this bit indicates that the Base and Limit
fields in this register are valid and that read directed to addresses between them
(inclusive) must be blocked by hardware. The base and limit fields are ignored when
this bit is cleared.
14:13 Reserved
12:0
Protected Range Base—R/W. This field corresponds to FLA address bits 24:12 and
specifies the lower base of the protected range. Address bits 11:0 are assumed to be
000h for the base comparison. Any address less than the value programmed in this
field is unaffected by this protected range.
Datasheet 833
Serial Peripheral Interface (SPI)
21.1.14 PR1—Protected Range 1 Register
(SPI Memory Mapped Configuration Registers)
Memory Address: SPIBAR + 78h Attribute: R/W
Default Value: 00000000h Size: 32 bits
Note: This register can not be written when the FLOCKDN bit is set to 1.
Bit Description
31
Write Protection EnableR/W. When set, this bit indicates that the Base and Limit
fields in this register are valid and that writes and erases directed to addresses between
them (inclusive) must be blocked by hardware. The base and limit fields are ignored
when this bit is cleared.
30:29 Reserved
28:16
Protected Range Limit—R/W. This field corresponds to FLA address bits 24:12 and
specifies the upper limit of the protected range. Address bits 11:0 are assumed to be
FFFh for the limit comparison. Any address greater than the value programmed in this
field is unaffected by this protected range.
15
Read Protection Enable—R/W. When set, this bit indicates that the Base and Limit
fields in this register are valid and that read directed to addresses between them
(inclusive) must be blocked by hardware. The base and limit fields are ignored when
this bit is cleared.
14:13 Reserved
12:0
Protected Range Base—R/W. This field corresponds to FLA address bits 24:12 and
specifies the lower base of the protected range. Address bits 11:0 are assumed to be
000h for the base comparison. Any address less than the value programmed in this
field is unaffected by this protected range.
Serial Peripheral Interface (SPI)
834 Datasheet
21.1.15 PR2—Protected Range 2 Register
(SPI Memory Mapped Configuration Registers)
Memory Address: SPIBAR + 7Ch Attribute: R/W
Default Value: 00000000h Size: 32 bits
Note: This register can not be written when the FLOCKDN bit is set to 1.
Bit Description
31
Write Protection Enable—R/W. When set, this bit indicates that the Base and Limit
fields in this register are valid and that writes and erases directed to addresses between
them (inclusive) must be blocked by hardware. The base and limit fields are ignored
when this bit is cleared.
30:29 Reserved
28:16
Protected Range LimitR/W. This field corresponds to FLA address bits 24:12 and
specifies the upper limit of the protected range. Address bits 11:0 are assumed to be
FFFh for the limit comparison. Any address greater than the value programmed in this
field is unaffected by this protected range.
15
Read Protection Enable—R/W. When set, this bit indicates that the Base and Limit
fields in this register are valid and that read directed to addresses between them
(inclusive) must be blocked by hardware. The base and limit fields are ignored when
this bit is cleared.
14:13 Reserved
12:0
Protected Range Base—R/W. This field corresponds to FLA address bits 24:12 and
specifies the lower base of the protected range. Address bits 11:0 are assumed to be
000h for the base comparison. Any address less than the value programmed in this
field is unaffected by this protected range.
Datasheet 835
Serial Peripheral Interface (SPI)
21.1.16 PR3—Protected Range 3 Register
(SPI Memory Mapped Configuration Registers)
Memory Address: SPIBAR + 80h Attribute: R/W
Default Value: 00000000h Size: 32 bits
Note: This register can not be written when the FLOCKDN bit is set to 1.
Bit Description
31
Write Protection EnableR/W. When set, this bit indicates that the Base and Limit
fields in this register are valid and that writes and erases directed to addresses between
them (inclusive) must be blocked by hardware. The base and limit fields are ignored
when this bit is cleared.
30:29 Reserved
28:16
Protected Range Limit—R/W. This field corresponds to FLA address bits 24:12 and
specifies the upper limit of the protected range. Address bits 11:0 are assumed to be
FFFh for the limit comparison. Any address greater than the value programmed in this
field is unaffected by this protected range.
15
Read Protection Enable—R/W. When set, this bit indicates that the Base and Limit
fields in this register are valid and that read directed to addresses between them
(inclusive) must be blocked by hardware. The base and limit fields are ignored when
this bit is cleared.
14:13 Reserved
12:0
Protected Range Base—R/W. This field corresponds to FLA address bits 24:12 and
specifies the lower base of the protected range. Address bits 11:0 are assumed to be
000h for the base comparison. Any address less than the value programmed in this
field is unaffected by this protected range.
Serial Peripheral Interface (SPI)
836 Datasheet
21.1.17 PR4—Protected Range 4 Register
(SPI Memory Mapped Configuration Registers)
Memory Address: SPIBAR + 84h Attribute: R/W
Default Value: 00000000h Size: 32 bits
Note: This register can not be written when the FLOCKDN bit is set to 1.
Bit Description
31
Write Protection Enable—R/W. When set, this bit indicates that the Base and Limit
fields in this register are valid and that writes and erases directed to addresses between
them (inclusive) must be blocked by hardware. The base and limit fields are ignored
when this bit is cleared.
30:29 Reserved
28:16
Protected Range LimitR/W. This field corresponds to FLA address bits 24:12 and
specifies the upper limit of the protected range. Address bits 11:0 are assumed to be
FFFh for the limit comparison. Any address greater than the value programmed in this
field is unaffected by this protected range.
15
Read Protection Enable—R/W. When set, this bit indicates that the Base and Limit
fields in this register are valid and that read directed to addresses between them
(inclusive) must be blocked by hardware. The base and limit fields are ignored when this
bit is cleared.
14:13 Reserved
12:0
Protected Range Base—R/W. This field corresponds to FLA address bits 24:12 and
specifies the lower base of the protected range. Address bits 11:0 are assumed to be
000h for the base comparison. Any address less than the value programmed in this field
is unaffected by this protected range.
Datasheet 837
Serial Peripheral Interface (SPI)
21.1.18 SSFS—Software Sequencing Flash Status Register
(SPI Memory Mapped Configuration Registers)
Memory Address: SPIBAR + 90h Attribute: RO, R/WC
Default Value: 00h Size: 8 bits
Note: The Software Sequencing control and status registers are reserved if the hardware
sequencing control and status registers are used.
Bit Description
7:5 Reserved
4Access Error Log (AEL)—RO. This bit reflects the value of the Hardware Sequencing
Status AEL register.
3
Flash Cycle Error (FCERR)—R/WC. Hardware sets this bit to 1 when a programmed
access is blocked from running on the SPI interface due to one of the protection policies
or when any of the programmed cycle registers is written while a programmed access is
already in progress. This bit remains asserted until cleared by software writing a 1 or
hardware reset due to a global reset or host partition reset in an Intel® ME enabled
system.
2
Cycle Done Status—R/WC. The PCH sets this bit to 1 when the SPI Cycle completes
(that is, SCIP bit is 0) after software sets the GO bit. This bit remains asserted until
cleared by software writing a 1 or hardware reset due to a global reset or host partition
reset in an Intel® ME enabled system. When this bit is set and the SPI SMI# Enable bit
is set, an internal signal is asserted to the SMI# generation block. Software must make
sure this bit is cleared prior to enabling the SPI SMI# assertion for a new programmed
access.
1 Reserved
0
SPI Cycle In Progress (SCIP)—RO. Hardware sets this bit when software sets the
SPI Cycle Go bit in the Command register. This bit remains set until the cycle completes
on the SPI interface. Hardware automatically sets and clears this bit so that software
can determine when read data is valid and/or when it is safe to begin programming the
next command. Software must only program the next command when this bit is 0.
Serial Peripheral Interface (SPI)
838 Datasheet
21.1.19 SSFC—Software Sequencing Flash Control Register
(SPI Memory Mapped Configuration Registers)
Memory Address: SPIBAR + 91h Attribute: R/W
Default Value: F80000h Size: 24 bits
Bit Description
23:19 Reserved. BIOS must set this field to ‘11111’b
18:16
SPI Cycle Frequency (SCF)—R/W. This register sets frequency to use for all SPI
software sequencing cycles (write, erase, fast read, read status, etc.) except for the
read cycle which always run at 20MHz.
000 = 20 MHz
001 = 33 MHz
100 = 50 MHz
All other values reserved.
This register is locked when the SPI Configuration Lock-Down bit is set.
15 SPI SMI# Enable (SME)—R/W. When set to 1, the SPI asserts an SMI# request
whenever the Cycle Done Status bit is 1.
14
Data Cycle (DS)—R/W. When set to 1, there is data that corresponds to this
transaction. When 0, no data is delivered for this cycle, and the DBC and data fields
themselves are don’t cares.
13:8
Data Byte Count (DBC)—R/W. This field specifies the number of bytes to shift in
or out during the data portion of the SPI cycle. The valid settings (in decimal) are
any value from 0 to 63. The number of bytes transferred is the value of this field
plus 1.
Note that when this field is 00_0000b, then there is 1 byte to transfer and that
11_1111b means there are 64 bytes to transfer.
7 Reserved
6:4
Cycle Opcode Pointer (COP)—R/W. This field selects one of the programmed
opcodes in the Opcode Menu to be used as the SPI Command/Opcode. In the case
of an Atomic Cycle Sequence, this determines the second command.—R/W.
3
Sequence Prefix Opcode Pointer (SPOP)—R/W. This field selects one of the two
programmed prefix opcodes for use when performing an Atomic Cycle Sequence. A
value of 0 points to the opcode in the least significant byte of the Prefix Opcodes
register. By making this programmable, the PCH supports flash devices that have
different opcodes for enabling writes to the data space vs. status register.
2
Atomic Cycle Sequence (ACS)—R/W. When set to 1 along with the SCGO
assertion, the PCH will execute a sequence of commands on the SPI interface
without allowing the LAN component to arbitrate and interleave cycles. The
sequence is composed of:
Atomic Sequence Prefix Command (8-bit opcode only)
Primary Command specified below by software (can include address and data)
Polling the Flash Status Register (opcode 05h) until bit 0 becomes 0b.
The SPI Cycle in Progress bit remains set and the Cycle Done Status bit remains
unset until the Busy bit in the Flash Status Register returns 0.
1
SPI Cycle Go (SCGO)R/WS. This bit always returns 0 on reads. However, a write
to this register with a 1 in this bit starts the SPI cycle defined by the other bits of
this register. The “SPI Cycle in Progress” (SCIP) bit gets set by this action. Hardware
must ignore writes to this bit while the Cycle In Progress bit is set.
Hardware allows other bits in this register to be programmed for the same
transaction when writing this bit to 1. This saves an additional memory write.
0 Reserved
Datasheet 839
Serial Peripheral Interface (SPI)
21.1.20 PREOP—Prefix Opcode Configuration Register
(SPI Memory Mapped Configuration Registers)
Memory Address: SPIBAR + 94h Attribute: R/W
Default Value: 0000h Size: 16 bits
NOTE: This register is not writable when the Flash Configuration Lock-Down bit (SPIBAR +
04h:15) is set.
21.1.21 OPTYPE—Opcode Type Configuration Register
(SPI Memory Mapped Configuration Registers)
Memory Address: SPIBAR + 96h Attribute: R/W
Default Value: 0000h Size: 16 bits
Entries in this register correspond to the entries in the Opcode Menu Configuration
register.
Note: The definition below only provides write protection for opcodes that have addresses
associated with them. Therefore, any erase or write opcodes that do not use an address
should be avoided (for example, “Chip Erase” and “Auto-Address Increment Byte
Program”)
NOTE: This register is not writable when the SPI Configuration Lock-Down bit (SPIBAR + 00h:15)
is set.
Bit Description
15:8 Prefix Opcode 1—R/W. Software programs an SPI opcode into this field that is
permitted to run as the first command in an atomic cycle sequence.
7:0 Prefix Opcode 0—R/W. Software programs an SPI opcode into this field that is
permitted to run as the first command in an atomic cycle sequence.
Bit Description
15:14 Opcode Type 7—R/W. See the description for bits 1:0
13:12 Opcode Type 6—R/W. See the description for bits 1:0
11:10 Opcode Type 5—R/W. See the description for bits 1:0
9:8 Opcode Type 4—R/W. See the description for bits 1:0
7:6 Opcode Type 3—R/W. See the description for bits 1:0
5:4 Opcode Type 2—R/W. See the description for bits 1:0
3:2 Opcode Type 1—R/W. See the description for bits 1:0
1:0
Opcode Type 0—R/W. This field specifies information about the corresponding Opcode
0. This information allows the hardware to 1) know whether to use the address field
and 2) provide BIOS and Shared Flash protection capabilities. The encoding of the two
bits is:
00 = No address associated with this Opcode; Read cycle type
01 = No address associated with this Opcode; Write cycle type
10 = Address required; Read cycle type
11 = Address required; Write cycle type
Serial Peripheral Interface (SPI)
840 Datasheet
21.1.22 OPMENU—Opcode Menu Configuration Register
(SPI Memory Mapped Configuration Registers)
Memory Address: SPIBAR + 98h Attribute: R/W
Default Value: 0000000000000000h Size: 64 bits
Eight entries are available in this register to give BIOS a sufficient set of commands for
communicating with the flash device, while also restricting what malicious software can
do. This keeps the hardware flexible enough to operate with a wide variety of SPI
devices.
Note: It is recommended that BIOS avoid programming Write Enable opcodes in this menu.
Malicious software could then perform writes and erases to the SPI flash without using
the atomic cycle mechanism. This could cause functional failures in a shared flash
environment. Write Enable opcodes should only be programmed in the Prefix Opcodes.
This register is not writable when the SPI Configuration Lock-Down bit (SPIBAR +
00h:15) is set.
Bit Description
63:56 Allowable Opcode 7—R/W. See the description for bits 7:0
55:48 Allowable Opcode 6—R/W. See the description for bits 7:0
47:40 Allowable Opcode 5—R/W. See the description for bits 7:0
39:32 Allowable Opcode 4—R/W. See the description for bits 7:0
31:24 Allowable Opcode 3—R/W. See the description for bits 7:0
23:16 Allowable Opcode 2—R/W. See the description for bits 7:0
15:8 Allowable Opcode 1—R/W. See the description for bits 7:0
7:0 Allowable Opcode 0—R/W. Software programs an SPI opcode into this field for use
when initiating SPI commands through the Control Register.
Datasheet 841
Serial Peripheral Interface (SPI)
21.1.23 BBAR—BIOS Base Address Configuration Register
(SPI Memory Mapped Configuration Registers)
Memory Address: SPIBAR + A0h Attribute: R/W, RO
Default Value: 00000000h Size: 32 bits
Eight entries are available in this register to give BIOS a sufficient set of commands for
communicating with the flash device, while also restricting what malicious software can
do. This keeps the hardware flexible enough to operate with a wide variety of SPI
devices.
21.1.24 FDOC—Flash Descriptor Observability Control Register
(SPI Memory Mapped Configuration Registers)
Memory Address: SPIBAR + B0h Attribute: R/W
Default Value: 00000000h Size: 32 bits
Note: This register that can be used to observe the contents of the Flash Descriptor that is
stored in the PCH Flash Controller. This register is only applicable when SPI device is in
descriptor mode.
Bit Description
31:24 Reserved
23:8
Bottom of System Flash—R/W. This field determines the bottom of the System BIOS.
The PCH will not run programmed commands nor memory reads whose address field is
less than this value. this field corresponds to bits 23:8 of the 3-byte address; bits 7:0
are assumed to be 00h for this vector when comparing to a potential SPI address.
NOTE: The SPI host controller prevents any programmed cycle using the address
register with an address less than the value in this register. Some flash devices
specify that the Read ID command must have an address of 0000h or 0001h. If
this command must be supported with these devices, it must be performed with
the BIOS BAR
7:0 Reserved
Bit Description
31:15 Reserved
14:12
Flash Descriptor Section Select (FDSS)—R/W. Selects which section within the
loaded Flash Descriptor to observe.
000 = Flash Signature and Descriptor Map
001 = Component
010 = Region
011 = Master
111 = Reserved
11:2 Flash Descriptor Section Index (FDSI)—R/W. Selects the DW offset within the Flash
Descriptor Section to observe.
1:0 Reserved
Serial Peripheral Interface (SPI)
842 Datasheet
21.1.25 FDOD—Flash Descriptor Observability Data Register
(SPI Memory Mapped Configuration Registers)
Memory Address: SPIBAR + B4h Attribute: RO
Default Value: 00000000h Size: 32 bits
Note: This register that can be used to observe the contents of the Flash Descriptor that is
stored in the PCH Flash Controller.
21.1.26 AFC—Additional Flash Control Register
(SPI Memory Mapped Configuration Registers)
Memory Address: SPIBAR + C0h Attribute: RO, R/W
Default Value: 00000000h Size: 32 bits.
21.1.27 LVSCC—Host Lower Vendor Specific Component
Capabilities Register
(SPI Memory Mapped Configuration Registers)
Memory Address: SPIBAR + C4h Attribute: RO, RWL
Default Value: 00000000h Size: 32 bits
Note: All attributes described in LVSCC must apply to all flash space below the FPBA, even if
it spans between two separate flash parts. This register is only applicable when SPI
device is in descriptor mode.
Bit Description
31:0 Flash Descriptor Section Data (FDSD)—RO. Returns the DW of data to observe as
selected in the Flash Descriptor Observability Control.
Bit Description
31:3 Reserved
2:1
Flash Controller Interface Dynamic Clock Gating Enable—R/W.
0 = Flash Controller Interface Dynamic Clock Gating is Disabled
1 = Flash Controller Interface Dynamic Clock Gating is Enabled
Other configurations are Reserved.
0
Flash Controller Core Dynamic Clock Gating Enable—R/W.
0 = Flash Controller Core Dynamic Clock Gating is Disabled
1 = Flash Controller Core Dynamic Clock Gating is Enabled
Bit Description
31:24 Reserved
23
Vendor Component Lock (LVCL)—RW. This register locks itself when set.
0 = The lock bit is not set
1 = The Vendor Component Lock bit is set.
NOTE: This bit applies to both UVSCC and LVSCC registers.
22:16 Reserved
15:8
Lower Erase Opcode (LEO)—RW. This register is programmed with the Flash erase
instruction opcode required by the vendor’s Flash component.
This register is locked by the Vendor Component Lock (LVCL) bit.
7:5 Reserved
Datasheet 843
Serial Peripheral Interface (SPI)
4
Write Enable on Write Status (LWEWS)—RW. This register is locked by the Vendor
Component Lock (LVCL) bit.
0 = No automatic write of 00h will be made to the SPI flash’s status register)
1 = A write of 00h to the SPI flash’s status register will be sent on EVERY write and erase
to the SPI flash. 06h 01h 00h is the opcode sequence used to unlock the Status
register.
NOTES:
1. This bit should not be set to 1 if there are non-volatile bits in the SPI flash’s
status register. This may lead to premature flash wear out.
2. This is not an atomic sequence. If the SPI components status register is non-
volatile, then BIOS should issue an atomic software sequence cycle to unlock the
flash part.
3. Bit 3 and bit 4 should NOT be both set to 1.
3
Lower Write Status Required (LWSR)—RW. This register is locked by the Vendor
Component Lock (LVCL) bit.
0 = No automatic write of 00h will be made to the SPI flash’s status register)
1 = A write of 00h to the SPI flash’s status register will be sent on EVERY write and erase
to the SPI flash. 50h 01h 00h is the opcode sequence used to unlock the Status
register.
NOTES:
1. This bit should not be set to 1 if there are non volatile bits in the SPI flash’s
status register. This may lead to premature flash wear out.
2. This is not an atomic sequence. If the SPI components status register is non-
volatile, then BIOS should issue an atomic software sequence cycle to unlock the
flash part.
3. Bit 3 and bit 4 should NOT be both set to 1.
2
Lower Write Granularity (LWG)—RW. This register is locked by the Vendor
Component Lock (LVCL) bit.
0 = 1 Byte
1 = 64 Byte
NOTES:
1. If more than one Flash component exists, this field must be set to the lowest
common write granularity of the different Flash components.
2. If using 64 B write, BIOS must ensure that multiple byte writes do not occur over
256 B boundaries. This will lead to corruption as the write will wrap around the
page boundary on the SPI flash part. This is a a feature page writable SPI flash.
1:0
Lower Block/Sector Erase Size (LBES)RW. This field identifies the erasable sector
size for all Flash components.
00 = 256 Byte
01 = 4 KB
10 = 8 KB
11 = 64 KB
This register is locked by the Vendor Component Lock (LVCL) bit.
Hardware takes no action based on the value of this register. The contents of this
register are to be used only by software and can be read in the HSFSTS.BERASE register
in both the BIOS and the GbE program registers if FLA is less than FPBA.
Bit Description
Serial Peripheral Interface (SPI)
844 Datasheet
21.1.28 UVSCC—Host Upper Vendor Specific Component
Capabilities Register
(SPI Memory Mapped Configuration Registers)
Memory Address: SPIBAR + C8h Attribute: RO, RWL
Default Value: 00000000h Size: 32 bits
Note: All attributes described in UVSCC must apply to all flash space equal to or above the
FPBA, even if it spans between two separate flash parts. This register is only applicable
when SPI device is in descriptor mode.
Note: To prevent this register from being modified you must use LVSCC.VCL bit.
Bit Description
31:16 Reserved
15:8
Upper Erase Opcode (UEO)—RW. This register is programmed with the Flash erase
instruction opcode required by the vendor’s Flash component.
This register is locked by the Vendor Component Lock (UVCL) bit.
7:5 Reserved
4
Write Enable on Write Status (UWEWS)—RW. This register is locked by the Vendor
Component Lock (UVCL) bit.
0 = No automatic write of 00h will be made to the SPI flash’s status register)
1 = A write of 00h to the SPI flash’s status register will be sent on EVERY write and
erase to the SPI flash. 06h 01h 00h is the opcode sequence used to unlock the
Status register.
NOTES:
1. This bit should not be set to 1 if there are non volatile bits in the SPI flash’s
status register. This may lead to premature flash wear out.
2. This is not an atomic sequence. If the SPI component’s status register is non-
volatile, then BIOS should issue an atomic software sequence cycle to unlock
the flash part.
3. Bit 3 and bit 4 should NOT be both set to 1.
3
Upper Write Status Required (UWSR)—RW. This register is locked by the Vendor
Component Lock (UVCL) bit.
0 = No automatic write of 00h will be made to the SPI flash’s status register)
1 = A write of 00h to the SPI flash’s status register will be sent on EVERY write and
erase to the SPI flash. 50h 01h 00h is the opcode sequence used to unlock the
Status register.
NOTES:
1. This bit should not be set to ‘1’ if there are non volatile bits in the SPI flash’s
status register. This may lead to premature flash wear out.
2. This is not an atomic sequence. If the SPI component’s status register is non-
volatile, then BIOS should issue an atomic software sequence cycle to unlock
the flash part.
3. Bit 3 and bit 4 should NOT be both set to 1.
Datasheet 845
Serial Peripheral Interface (SPI)
21.1.29 FPB—Flash Partition Boundary Register
(SPI Memory Mapped Configuration Registers)
Memory Address: SPIBAR + D0h Attribute: RO
Default Value: 00000000h Size: 32 bits
Note: This register is only applicable when SPI device is in descriptor mode.
21.2 Flash Descriptor Records
The following sections describe the data structure of the Flash Descriptor on the SPI
device. These are not registers within the PCH.
2
Upper Write Granularity (UWG)—RW. This register is locked by the Vendor
Component Lock (UVCL) bit.
0 = 1 Byte
1 = 64 Byte
NOTES:
1. If more than one Flash component exists, this field must be set to the lowest
common write granularity of the different Flash components.
2. If using 64 B write, BIOS must ensure that multiple byte writes do not occur
over 256 B boundaries. This will lead to corruption as the write will wrap around
the page boundary on the SPI flash part. This is a a feature page writable SPI
flash.
1:0
Upper Block/Sector Erase Size (UBES)—RW. This field identifies the erasable sector
size for all Flash components.
Valid Bit Settings:
00 = 256 Byte
01 = 4 KB
10 = 8 KB
11 = 64 KB
This register is locked by the Vendor Component Lock (UVCL) bit.
Hardware takes no action based on the value of this register. The contents of this
register are to be used only by software and can be read in the HSFSTS.BERASE
register in both the BIOS and the GbE program registers if FLA is greater or equal to
FPBA.
Bit Description
Bit Description
31:13 Reserved
12:0 Flash Partition Boundary Address (FPBA)—RO. This register reflects the value of
Flash Descriptor Component FPBA field.
Serial Peripheral Interface (SPI)
846 Datasheet
21.3 OEM Section
Memory Address: F00h
Default Value: Size: 256 Bytes
256 Bytes are reserved at the top of the Flash Descriptor for use by the OEM. The
information stored by the OEM can only be written during the manufacturing process as
the Flash Descriptor read/write permissions must be set to Read Only when the
computer leaves the manufacturing floor. The PCH Flash controller does not read this
information. FFh is suggested to reduce programming time.
21.4 GbE SPI Flash Program Registers
The GbE Flash registers are memory-mapped with a base address MBARB found in the
GbE LAN register chapter Device 25: Function 0: Offset 14h. The individual registers
are then accessible at MBARB + Offset as indicated in the following table.
These memory mapped registers must be accessed in byte, word, or DWord quantities.
Note: These register are only applicable when SPI flash is used in descriptor mode.
Table 21-2. Gigabit LAN SPI Flash Program Register Address Map
(GbE LAN Memory Mapped Configuration Registers)
MBARB +
Offset Mnemonic Register Name Default Access
00h–03h GLFPR Gigabit LAN Flash Primary Region 00000000h
04h–05h HSFSTS Hardware Sequencing Flash Status 0000h
06h–07h HSFCTL Hardware Sequencing Flash Control 0000h
08h–0Bh FADDR Flash Address 00000000h
0Ch–0Fh Reserved Reserved 00000000h
10h–13h FDATA0 Flash Data 0 00000000h
14h–4Fh Reserved Reserved 00000000h
50h–53h FRACC Flash Region Access Permissions 00000000h
54h–57h FREG0 Flash Region 0 00000000h
58h–5Bh FREG1 Flash Region 1 00000000h
5Ch–5F FREG2 Flash Region 2 00000000h
60h–63h FREG3 Flash Region 3 00000000h
64h–73h Reserved Reserved for Future Flash Regions
74h–77h FPR0 Flash Protected Range 0 00000000h
78h–7Bh FPR1 Flash Protected Range 1 00000000h
7Ch–8Fh Reserved Reserved
90h SSFSTS Software Sequencing Flash Status 00h
91h–93h SSFCTL Software Sequencing Flash Control 000000h
94h–95h PREOP Prefix Opcode Configuration 0000h
96h–97h OPTYPE Opcode Type Configuration 0000h
98h–9Fh OPMENU Opcode Menu Configuration 00000000
00000000h
A0h–DFh Reserved Reserved
Datasheet 847
Serial Peripheral Interface (SPI)
21.4.1 GLFPR –Gigabit LAN Flash Primary Region Register
(GbE LAN Memory Mapped Configuration Registers)
Memory Address: MBARB + 00h Attribute: RO
Default Value: 00000000h Size: 32 bits
21.4.2 HSFS—Hardware Sequencing Flash Status Register
(GbE LAN Memory Mapped Configuration Registers)
Memory Address: MBARB + 04h Attribute: RO, R/WC, R/W
Default Value: 0000h Size: 16 bits
Bit Description
31:29 Reserved
28:16
GbE Flash Primary Region Limit (PRL)—RO. This specifies address bits 24:12 for
the Primary Region Limit.
The value in this register loaded from the contents in the Flash
Descriptor.FLREG3.Region Limit
15:13 Reserved
12:0
GbE Flash Primary Region Base (PRB)—RO. This specifies address bits 24:12 for
the Primary Region Base
The value in this register is loaded from the contents in the Flash
Descriptor.FLREG3.Region Base
Bit Description
15
Flash Configuration Lock-Down (FLOCKDN)—R/W. When set to 1, those Flash
Program Registers that are locked down by this FLOCKDN bit cannot be written. Once
set to 1, this bit can only be cleared by a hardware reset due to a global reset or host
partition reset in an Intel® ME enabled system.
14
Flash Descriptor Valid (FDV)—RO. This bit is set to a 1 if the Flash Controller read
the correct Flash Descriptor Signature.
If the Flash Descriptor Valid bit is not 1, software cannot use the Hardware Sequencing
registers, but must use the software sequencing registers. Any attempt to use the
Hardware Sequencing registers will result in the FCERR bit being set.
13
Flash Descriptor Override Pin Strap Status (FDOPSS)—RO. This bit reflects the
value the Flash Descriptor Override Pin-Strap.
0 = The Flash Descriptor Override strap is set
1 = No override
12:6 Reserved
5
SPI Cycle In Progress (SCIP)—RO. Hardware sets this bit when software sets the
Flash Cycle Go (FGO) bit in the Hardware Sequencing Flash Control register. This bit
remains set until the cycle completes on the SPI interface. Hardware automatically sets
and clears this bit so that software can determine when read data is valid and/or when
it is safe to begin programming the next command. Software must only program the
next command when this bit is 0.
Serial Peripheral Interface (SPI)
848 Datasheet
4:3
Block/Sector Erase Size (BERASE)—RO. This field identifies the erasable sector size
for all Flash components.
00 = 256 Byte
01 = 4 K Byte
10 = 8 K Byte
11 = 64 K Byte
If the Flash Linear Address is less than FPBA then this field reflects the value in the
LVSCC.LBES register.
If the Flash Linear Address is greater or equal to FPBA then this field reflects the value
in the UVSCC.UBES register.
2
Access Error Log (AEL)—R/W/C. Hardware sets this bit to a 1 when an attempt was
made to access the BIOS region using the direct access method or an access to the
BIOS Program Registers that violated the security restrictions. This bit is simply a log of
an access security violation. This bit is cleared by software writing a 1.
1
Flash Cycle Error (FCERR)—R/W/C. Hardware sets this bit to 1 when an program
register access is blocked to the FLASH due to one of the protection policies or when
any of the programmed cycle registers is written while a programmed access is already
in progress. This bit remains asserted until cleared by software writing a 1 or until
hardware reset occurs due to a global reset or host partition reset in an Intel® ME
enabled system. Software must clear this bit before setting the FLASH Cycle GO bit in
this register.
0
Flash Cycle Done (FDONE)—R/W/C. The PCH sets this bit to 1 when the SPI Cycle
completes after software previously set the FGO bit. This bit remains asserted until
cleared by software writing a 1 or hardware reset due to a global reset or host partition
reset in an Intel® ME enabled system. When this bit is set and the SPI SMI# Enable bit
is set, an internal signal is asserted to the SMI# generation block. Software must make
sure this bit is cleared prior to enabling the SPI SMI# assertion for a new programmed
access.
Bit Description
Datasheet 849
Serial Peripheral Interface (SPI)
21.4.3 HSFC—Hardware Sequencing Flash Control Register
(GbE LAN Memory Mapped Configuration Registers)
Memory Address: MBARB + 06h Attribute: R/W, R/WS
Default Value: 0000h Size: 16 bits
Bit Description
15:10 Reserved
9:8
Flash Data Byte Count (FDBC)—R/W. This field specifies the number of bytes to shift
in or out during the data portion of the SPI cycle. The contents of this register are 0s
based with 0b representing 1 byte and 11b representing 4 bytes. The number of bytes
transferred is the value of this field plus 1.
This field is ignored for the Block Erase command.
7:3 Reserved
2:1
FLASH Cycle (FCYCLE)—R/W. This field defines the Flash SPI cycle type generated to
the FLASH when the FGO bit is set as defined below:
00 = Read (1 up to 4 bytes by setting FDBC)
01 = Reserved
10 = Write (1 up to 4 bytes by setting FDBC)
11 = Block Erase
0
Flash Cycle Go (FGO)—R/W/S. A write to this register with a 1 in this bit initiates a
request to the Flash SPI Arbiter to start a cycle. This register is cleared by hardware
when the cycle is granted by the SPI arbiter to run the cycle on the SPI bus. When the
cycle is complete, the FDONE bit is set.
Software is forbidden to write to any register in the HSFLCTL register between the FGO
bit getting set and the FDONE bit being cleared. Any attempt to violate this rule will be
ignored by hardware.
Hardware allows other bits in this register to be programmed for the same transaction
when writing this bit to 1. This saves an additional memory write.
This bit always returns 0 on reads.
Serial Peripheral Interface (SPI)
850 Datasheet
21.4.4 FADDR—Flash Address Register
(GbE LAN Memory Mapped Configuration Registers)
Memory Address: MBARB + 08h Attribute: R/W
Default Value: 00000000h Size: 32 bits
21.4.5 FDATA0—Flash Data 0 Register
(GbE LAN Memory Mapped Configuration Registers)
Memory Address: MBARB + 10h Attribute: R/W
Default Value: 00000000h Size: 32 bits
Bit Description
31:25 Reserved
24:0
Flash Linear Address (FLA)—R/W. The FLA is the starting byte linear address of a
SPI Read or Write cycle or an address within a Block for the Block Erase command. The
Flash Linear Address must fall within a region for which BIOS has access permissions.
Bit Description
31:0
Flash Data 0 (FD0)—R/W. This field is shifted out as the SPI Data on the Master-Out
Slave-In Data pin during the data portion of the SPI cycle.
This register also shifts in the data from the Master-In Slave-Out pin into this register
during the data portion of the SPI cycle.
The data is always shifted starting with the least significant byte, msb to lsb, followed
by the next least significant byte, msb to lsb, etc. Specifically, the shift order on SPI in
terms of bits within this register is: 7-6-5-4-3-2-1-0-15-14-13-…8-23-22-…16-31…24
Bit 24 is the last bit shifted out/in. There are no alignment assumptions; byte 0 always
represents the value specified by the cycle address.
Note that the data in this register may be modified by the hardware during any
programmed SPI transaction. Direct Memory Reads do not modify the contents of this
register.
Datasheet 851
Serial Peripheral Interface (SPI)
21.4.6 FRAP—Flash Regions Access Permissions Register
(GbE LAN Memory Mapped Configuration Registers)
Memory Address: MBARB + 50h Attribute: RO, R/W
Default Value: 00000808h Size: 32 bits
Bit Description
31:28 Reserved
27:25
GbE Master Write Access Grant (GMWAG)—R/W. Each bit 27:25 corresponds to
Master[3:1]. GbE can grant one or more masters write access to the GbE region 3
overriding the permissions in the Flash Descriptor.
Master[1] is Host CPU/BIOS, Master[2] is Intel® Management Engine, Master[3] is Host
processor/GbE.
The contents of this register are locked by the FLOCKDN bit.
24:20 Reserved
19:17
GbE Master Read Access Grant (GMRAG)—R/W. Each bit 19:17 corresponds to
Master[3:1]. GbE can grant one or more masters read access to the GbE region 3
overriding the read permissions in the Flash Descriptor.
Master[1] is Host processor/BIOS, Master[2] is Intel® Management Engine, Master[3]
is GbE.
The contents of this register are locked by the FLOCKDN bit
16:12 Reserved
11:8
GbE Region Write Access (GRWA)—RO. Each bit 11:8 corresponds to Regions 3:0.
If the bit is set, this master can erase and write that particular region through register
accesses.
The contents of this register are that of the Flash Descriptor. Flash Master 3.Master
Region Write Access OR a particular master has granted GbE write permissions in their
Master Write Access Grant register OR the Flash Descriptor Security Override strap is
set.
7:4 Reserved
3:0
GbE Region Read Access (GRRA)—RO. Each bit 3:0 corresponds to Regions 3:0. If
the bit is set, this master can read that particular region through register accesses.
The contents of this register are that of the Flash Descriptor. Flash Master 3.Master
Region Write Access OR a particular master has granted GbE read permissions in their
Master Read Access Grant register.
Serial Peripheral Interface (SPI)
852 Datasheet
21.4.7 FREG0—Flash Region 0 (Flash Descriptor) Register
(GbE LAN Memory Mapped Configuration Registers)
Memory Address: MBARB + 54h Attribute: RO
Default Value: 00000000h Size: 32 bits
21.4.8 FREG1—Flash Region 1 (BIOS Descriptor) Register
(GbE LAN Memory Mapped Configuration Registers)
Memory Address: MBARB + 58h Attribute: RO
Default Value: 00000000h Size: 32 bits
21.4.9 FREG2—Flash Region 2 (Intel® ME) Register
(GbE LAN Memory Mapped Configuration Registers)
Memory Address: MBARB + 5Ch Attribute: RO
Default Value: 00000000h Size: 32 bits
Bit Description
31:29 Reserved
28:16
Region Limit (RL)—RO. This specifies address bits 24:12 for the Region 0 Limit.
The value in this register is loaded from the contents in the Flash
Descriptor.FLREG0.Region Limit
15:13 Reserved
12:0
Region Base (RB)—RO. This specifies address bits 24:12 for the Region 0 Base
The value in this register is loaded from the contents in the Flash
Descriptor.FLREG0.Region Base
Bit Description
31:29 Reserved
28:16
Region Limit (RL)—RO. This specifies address bits 24:12 for the Region 1 Limit.
The value in this register is loaded from the contents in the Flash
Descriptor.FLREG1.Region Limit.
15:13 Reserved
12:0
Region Base (RB)—RO. This specifies address bits 24:12 for the Region 1 Base
The value in this register is loaded from the contents in the Flash
Descriptor.FLREG1.Region Base.
Bit Description
31:29 Reserved
28:16
Region Limit (RL)—RO. This specifies address bits 24:12 for the Region 2 Limit.
The value in this register is loaded from the contents in the Flash
Descriptor.FLREG2.Region Limit.
15:13 Reserved
12:0
Region Base (RB)—RO. This specifies address bits 24:12 for the Region 2 Base
The value in this register is loaded from the contents in the Flash
Descriptor.FLREG2.Region Base.
Datasheet 853
Serial Peripheral Interface (SPI)
21.4.10 FREG3—Flash Region 3 (GbE) Register
(GbE LAN Memory Mapped Configuration Registers)
Memory Address: MBARB + 60h Attribute: RO
Default Value: 00000000hSize: 32 bits
21.4.11 PR0—Protected Range 0 Register
(GbE LAN Memory Mapped Configuration Registers)
Memory Address: MBARB + 74h Attribute: R/W
Default Value: 00000000h Size: 32 bits
Note: This register can not be written when the FLOCKDN bit is set to 1.
Bit Description
31:29 Reserved
28:16
Region Limit (RL)—RO. This specifies address bits 24:12 for the Region 3 Limit.
The value in this register is loaded from the contents in the Flash
Descriptor.FLREG3.Region Limit.
15:13 Reserved
12:0
Region Base (RB)—RO. This specifies address bits 24:12 for the Region 3 Base
The value in this register is loaded from the contents in the Flash
Descriptor.FLREG3.Region Base.
Bit Description
31
Write Protection EnableR/W. When set, this bit indicates that the Base and Limit
fields in this register are valid and that writes and erases directed to addresses between
them (inclusive) must be blocked by hardware. The base and limit fields are ignored
when this bit is cleared.
30:29 Reserved
28:16
Protected Range Limit—R/W. This field corresponds to FLA address bits 24:12 and
specifies the upper limit of the protected range. Address bits 11:0 are assumed to be
FFFh for the limit comparison. Any address greater than the value programmed in this
field is unaffected by this protected range.
15
Read Protection Enable—R/W. When set, this bit indicates that the Base and Limit
fields in this register are valid and that read directed to addresses between them
(inclusive) must be blocked by hardware. The base and limit fields are ignored when
this bit is cleared.
14:13 Reserved
12:0
Protected Range Base—R/W. This field corresponds to FLA address bits 24:12 and
specifies the lower base of the protected range. Address bits 11:0 are assumed to be
000h for the base comparison. Any address less than the value programmed in this
field is unaffected by this protected range.
Serial Peripheral Interface (SPI)
854 Datasheet
21.4.12 PR1—Protected Range 1 Register
(GbE LAN Memory Mapped Configuration Registers)
Memory Address: MBARB + 78h Attribute: R/W
Default Value: 00000000h Size: 32 bits
Note: This register can not be written when the FLOCKDN bit is set to 1.
Bit Description
31
Write Protection Enable—R/W. When set, this bit indicates that the Base and Limit
fields in this register are valid and that writes and erases directed to addresses between
them (inclusive) must be blocked by hardware. The base and limit fields are ignored
when this bit is cleared.
30:29 Reserved
28:16
Protected Range LimitR/W. This field corresponds to FLA address bits 24:12 and
specifies the upper limit of the protected range. Address bits 11:0 are assumed to be
FFFh for the limit comparison. Any address greater than the value programmed in this
field is unaffected by this protected range.
15
Read Protection Enable—R/W. When set, this bit indicates that the Base and Limit
fields in this register are valid and that read directed to addresses between them
(inclusive) must be blocked by hardware. The base and limit fields are ignored when
this bit is cleared.
14:13 Reserved
12:0
Protected Range Base—R/W. This field corresponds to FLA address bits 24:12 and
specifies the lower base of the protected range. Address bits 11:0 are assumed to be
000h for the base comparison. Any address less than the value programmed in this
field is unaffected by this protected range.
Datasheet 855
Serial Peripheral Interface (SPI)
21.4.13 SSFS—Software Sequencing Flash Status Register
(GbE LAN Memory Mapped Configuration Registers)
Memory Address: MBARB + 90h Attribute: RO, R/WC
Default Value: 00h Size: 8 bits
Note: The Software Sequencing control and status registers are reserved if the hardware
sequencing control and status registers are used.
Bit Description
7:5 Reserved
4Access Error Log (AEL)—RO. This bit reflects the value of the Hardware Sequencing
Status AEL register.
3
Flash Cycle Error (FCERR)—R/WC. Hardware sets this bit to 1 when a programmed
access is blocked from running on the SPI interface due to one of the protection policies
or when any of the programmed cycle registers is written while a programmed access is
already in progress. This bit remains asserted until cleared by software writing a 1 or
hardware reset due to a global reset or host partition reset in an Intel® ME enabled
system.
2
Cycle Done Status—R/WC. The PCH sets this bit to 1 when the SPI Cycle completes
(that is, SCIP bit is 0) after software sets the GO bit. This bit remains asserted until
cleared by software writing a 1 or hardware reset due to a global reset or host partition
reset in an Intel® ME enabled system. When this bit is set and the SPI SMI# Enable bit
is set, an internal signal is asserted to the SMI# generation block. Software must make
sure this bit is cleared prior to enabling the SPI SMI# assertion for a new programmed
access.
1 Reserved
0
SPI Cycle In Progress (SCIP)—RO. Hardware sets this bit when software sets the
SPI Cycle Go bit in the Command register. This bit remains set until the cycle completes
on the SPI interface. Hardware automatically sets and clears this bit so that software
can determine when read data is valid and/or when it is safe to begin programming the
next command. Software must only program the next command when this bit is 0.
Serial Peripheral Interface (SPI)
856 Datasheet
21.4.14 SSFC—Software Sequencing Flash Control Register
(GbE LAN Memory Mapped Configuration Registers)
Memory Address: MBARB + 91h Attribute: R/W
Default Value: 000000h Size: 24 bits
Bit Description
23:19 Reserved
18:16
SPI Cycle Frequency (SCF)—R/W. This register sets frequency to use for all SPI
software sequencing cycles (write, erase, fast read, read status, etc.) except for the
read cycle which always run at 20 MHz.
000 = 20 MHz
001 = 33 MHz
All other values = Reserved.
This register is locked when the SPI Configuration Lock-Down bit is set.
15 Reserved
14
Data Cycle (DS)—R/W. When set to 1, there is data that corresponds to this
transaction. When 0, no data is delivered for this cycle, and the DBC and data fields
themselves are don’t cares
13:8
Data Byte Count (DBC)—R/W. This field specifies the number of bytes to shift in or
out during the data portion of the SPI cycle. The valid settings (in decimal) are any
value from 0 to 3. The number of bytes transferred is the value of this field plus 1.
Note that when this field is 00b, then there is 1 byte to transfer and that 11b means
there are 4 bytes to transfer.
7 Reserved
6:4
Cycle Opcode Pointer (COP)—R/W. This field selects one of the programmed
opcodes in the Opcode Menu to be used as the SPI Command/Opcode. In the case of an
Atomic Cycle Sequence, this determines the second command.
3
Sequence Prefix Opcode Pointer (SPOP)—R/W. This field selects one of the two
programmed prefix opcodes for use when performing an Atomic Cycle Sequence. A
value of 0 points to the opcode in the least significant byte of the Prefix Opcodes
register. By making this programmable, the PCH supports flash devices that have
different opcodes for enabling writes to the data space versus status register.
2
Atomic Cycle Sequence (ACS)—R/W. When set to 1 along with the SCGO assertion,
the PCH will execute a sequence of commands on the SPI interface without allowing the
LAN component to arbitrate and interleave cycles. The sequence is composed of:
Atomic Sequence Prefix Command (8-bit opcode only)
Primary Command specified below by software (can include address and data)
Polling the Flash Status Register (opcode 05h) until bit 0 becomes 0b.
The SPI Cycle in Progress bit remains set and the Cycle Done Status bit remains unset
until the Busy bit in the Flash Status Register returns 0.
1
SPI Cycle Go (SCGO)—R/WS. This bit always returns 0 on reads. However, a write to
this register with a ‘1’ in this bit starts the SPI cycle defined by the other bits of this
register. The “SPI Cycle in Progress” (SCIP) bit gets set by this action. Hardware must
ignore writes to this bit while the Cycle In Progress bit is set.
Hardware allows other bits in this register to be programmed for the same transaction
when writing this bit to 1. This saves an additional memory write.
0 Reserved
Datasheet 857
Serial Peripheral Interface (SPI)
21.4.15 PREOP—Prefix Opcode Configuration Register
(GbE LAN Memory Mapped Configuration Registers)
Memory Address: MBARB + 94h Attribute: R/W
Default Value: 0000h Size: 16 bits
NOTE: This register is not writable when the SPI Configuration Lock-Down bit (MBARB + 00h:15)
is set.
21.4.16 OPTYPE—Opcode Type Configuration Register
(GbE LAN Memory Mapped Configuration Registers)
Memory Address: MBARB + 96h Attribute: R/W
Default Value: 0000h Size: 16 bits
Entries in this register correspond to the entries in the Opcode Menu Configuration
register.
Note: The definition below only provides write protection for opcodes that have addresses
associated with them. Therefore, any erase or write opcodes that do not use an address
should be avoided (for example, “Chip Erase” and “Auto-Address Increment Byte
Program”).
NOTE: This register is not writable when the SPI Configuration Lock-Down bit (MBARB + 00h:15)
is set.
Bit Description
15:8 Prefix Opcode 1—R/W. Software programs an SPI opcode into this field that is
permitted to run as the first command in an atomic cycle sequence.
7:0 Prefix Opcode 0—R/W. Software programs an SPI opcode into this field that is
permitted to run as the first command in an atomic cycle sequence.
Bit Description
15:14 Opcode Type 7—R/W. See the description for bits 1:0
13:12 Opcode Type 6—R/W. See the description for bits 1:0
11:10 Opcode Type 5—R/W. See the description for bits 1:0
9:8 Opcode Type 4—R/W. See the description for bits 1:0
7:6 Opcode Type 3—R/W. See the description for bits 1:0
5:4 Opcode Type 2—R/W. See the description for bits 1:0
3:2 Opcode Type 1—R/W. See the description for bits 1:0
1:0
Opcode Type 0—R/W. This field specifies information about the corresponding Opcode
0. This information allows the hardware to 1) know whether to use the address field
and 2) provide BIOS and Shared Flash protection capabilities. The encoding of the two
bits is:
00 = No address associated with this Opcode; Read cycle type
01 = No address associated with this Opcode; Write cycle type
10 = Address required; Read cycle type
11 = Address required; Write cycle type
Serial Peripheral Interface (SPI)
858 Datasheet
21.4.17 OPMENU—Opcode Menu Configuration Register
(GbE LAN Memory Mapped Configuration Registers)
Memory Address: MBARB + 98h Attribute: R/W
Default Value: 0000000000000000h Size: 64 bits
Eight entries are available in this register to give GbE a sufficient set of commands for
communicating with the flash device, while also restricting what malicious software can
do. This keeps the hardware flexible enough to operate with a wide variety of SPI
devices.
Note: It is recommended that GbE avoid programming Write Enable opcodes in this menu.
Malicious software could then perform writes and erases to the SPI flash without using
the atomic cycle mechanism. This could cause functional failures in a shared flash
environment. Write Enable opcodes should only be programmed in the Prefix Opcodes.
This register is not writable when the SPI Configuration Lock-Down bit (MBARB +
00h:15) is set.
§ §
Bit Description
63:56 Allowable Opcode 7—R/W. See the description for bits 7:0
55:48 Allowable Opcode 6—R/W. See the description for bits 7:0
47:40 Allowable Opcode 5—R/W. See the description for bits 7:0
39:32 Allowable Opcode 4—R/W. See the description for bits 7:0
31:24 Allowable Opcode 3—R/W. See the description for bits 7:0
23:16 Allowable Opcode 2—R/W. See the description for bits 7:0
15:8 Allowable Opcode 1—R/W. See the description for bits 7:0
7:0 Allowable Opcode 0—R/W. Software programs an SPI opcode into this field for use
when initiating SPI commands through the Control Register.
Datasheet 859
Thermal Sensor Registers (D31:F6)
22 Thermal Sensor Registers
(D31:F6)
22.1 PCI Bus Configuration Registers
Table 22-1. Thermal Sensor Register Address Map
Offset Mnemonic Register Name Default Type
00h–01h VID Vendor Identification 8086h RO
02h–03h DID Device Identification 3B32h RO
04h–05h CMD Command Register 0000h R/W, RO
06h–07h STS Device Status 0010h R/WC, RO
08h RID Revision ID 00h RO
09h PI Programming Interface 00h RO
0Ah SCC Sub Class Code 80h RO
0Bh BCC Base Class Code 11h RO
0Ch CLS Cache Line Size 00h RO
0Dh LT Latency Timer 00h RO
0Eh HTYPE Header Type 00h RO
0Fh BIST Built-in Self Test 00h RO
10h–13h TBAR Thermal Base Address (Memory) 00000004h R/W, RO
14h–17h TBARH Thermal Base Address High DWord 00000000h RO
2Ch–2Dh SVID Subsystem Vendor Identifier 0000h R/WO
2Eh–2Fh SID Subsystem Identifier 0000h R/WO
34h CAP_PTR Capabilities Pointer 50h RO
3Ch INTLN Interrupt Line 00h RW
3Dh INTPN Interrupt Pin See
Description RO
40h–43h TBARB BIOS Assigned Thermal Base Address 00000004h R/W, RO
44h–47h TBARBH BIOS Assigned Thermal Base High
DWord 00000000h R/W
50h–51h PID Power Management Identifiers 8001h RO
52h–53h PC Power Management Capabilities 0023h RO
54h–57h PCS Power Management Control and Status 0008h R/W, RO
Thermal Sensor Registers (D31:F6)
860 Datasheet
22.1.1 VID—Vendor Identification Register
Offset Address: 00h01h Attribute: RO
Default Value: 8086h Size: 16 bit
Lockable: No Power Well: Core
22.1.2 DID—Device Identification Register
Offset Address: 02h03h Attribute: RO
Default Value: 3B32h Size: 16 bits
22.1.3 CMD—Command Register
Address Offset: 04h05h Attribute: RO, R/W
Default Value: 0000h Size: 16 bits
Bit Description
15:0 Vendor ID—RO. This is a 16-bit value assigned to Intel. Intel VID = 8086h
Bit Description
15:0 Device ID (DID)—RO. Indicates the device number assigned by the SIG.
Bit Description
15:11 Reserved
10
Interrupt Disable (ID)—RW. Enables the device to assert an INTx#.
0 = When cleared, the INTx# signal may be asserted.
1 = When set, the Thermal logic’s INTx# signal will be de-asserted.
9FBE (Fast Back to Back Enable)—RO. Not implemented. Hardwired to 0.
8SEN (SERR Enable)—RO. Not implemented. Hardwired to 0.
7WCC (Wait Cycle Control)—RO. Not implemented. Hardwired to 0.
6PER (Parity Error Response)—RO. Not implemented. Hardwired to 0.
5VPS (VGA Palette Snoop)—RO. Not implemented. Hardwired to 0.
4MWI (Memory Write and Invalidate Enable)—RO. Not implemented. Hardwired to
0.
3SCE (Special Cycle Enable)—RO. Not implemented. Hardwired to 0.
2
BME (Bus Master Enable)—R/W.
0 = Function disabled as bus master.
1 = Function enabled as bus master.
1
Memory Space Enable (MSE)—RW.
0 = Disable
1 = Enable. Enables memory space accesses to the Thermal registers.
0IOS (I/O Space)—RO. The Thermal logic does not implement IO Space; therefore,
this bit is hardwired to 0.
Datasheet 861
Thermal Sensor Registers (D31:F6)
22.1.4 STS—Status Register
Address Offset: 06h07h Attribute: R/WC, RO
Default Value: 0010h Size: 16 bits
22.1.5 RID—Revision Identification Register
Address Offset: 08h Attribute: RO
Default Value: 00h Size: 8 bits
22.1.6 PI—Programming Interface Register
Address Offset: 09h Attribute: RO
Default Value: 00h Size: 8 bits
Bit Description
15
Detected Parity Error (DPE)—R/WC. This bit is set whenever a parity error is seen
on the internal interface for this function, regardless of the setting of bit 6 in the
command register. Software clears this bit by writing a 1 to this bit location.
14 SERR# Status (SERRS)RO. Not implemented. Hardwired to 0.
13 Received Master Abort (RMA)RO. Not implemented. Hardwired to 0.
12 Received Target Abort (RTA)RO. Not implemented. Hardwired to 0.
11 Signaled Target-Abort (STA)RO. Not implemented. Hardwired to 0.
10:9 DEVSEL# Timing Status (DEVT)RO. Does not apply. Hardwired to 0.
8 Master Data Parity Error (MDPE)RO. Not implemented. Hardwired to 0.
7 Fast Back to Back Capable (FBC)RO. Does not apply. Hardwired to 0.
6Reserved
5 66 MHz Capable (C66)RO. Does not apply. Hardwired to 0.
4
Capabilities List Exists (CLIST)—RO. Indicates that the controller contains a
capabilities pointer list. The first item is pointed to by looking at configuration offset
34h.
3
Interrupt Status (IS)—RO. Reflects the state of the INTx# signal at the input of the
enable/disable circuit. This bit is a 1 when the INTx# is asserted. This bit is a 0 after
the interrupt is cleared (independent of the state of the Interrupt Disable bit in the
command register).
2:0 Reserved
Bit Description
7:0 Revision ID (RID)—RO. Indicates the device specific revision identifier.
Bit Description
7:0 Programming Interface (PI)—RO. The PCH Thermal logic has no standard
programming interface.
Thermal Sensor Registers (D31:F6)
862 Datasheet
22.1.7 SCC—Sub Class Code Register
Address Offset: 0Ah Attribute: RO
Default Value: 80h Size: 8 bits
22.1.8 BCC—Base Class Code Register
Address Offset: 0Bh Attribute: RO
Default Value: 11h Size: 8 bits
22.1.9 CLS—Cache Line Size Register
Address Offset: 0Ch Attribute: RO
Default Value: 00h Size: 8 bits
22.1.10 LT—Latency Timer Register
Address Offset: 0Dh Attribute: RO
Default Value: 00h Size: 8 bits
22.1.11 HTYPE—Header Type Register
Address Offset: 0Eh Attribute: RO
Default Value: 00h Size: 8 bits
Bit Description
7:0 Sub Class Code (SCC)—RO. Value assigned to the PCH Thermal logic.
Bit Description
7:0 Base Class Code (BCC)—RO. Value assigned to the PCH Thermal logic.
Bit Description
7:0 Cache Line Size (CLS)—RO. Does not apply to PCI Bus Target-only devices.
Bit Description
7:0 Latency Timer (LT)—RO. Does not apply to PCI Bus Target-only devices.
Bit Description
7
Multi-Function Device (MFD)—RO. This bit is 0 because a multi-function device only
needs to be marked as such in Function 0, and the Thermal registers are not in
Function 0.
6:0 Header Type (HTYPE)—RO. Implements Type 0 Configuration header.
Datasheet 863
Thermal Sensor Registers (D31:F6)
22.1.12 TBAR—Thermal Base Register
Address Offset: 10h13h Attribute: RW, RO
Default Value: 00000004h Size: 32 bits
This BAR creates 4K bytes of memory space to signify the base address of Thermal
memory mapped configuration registers. This memory space is active when the
Command (CMD) register Memory Space Enable (MSE) bit is set and either
TBAR[31:12] or TBARH are programmed to a non-zero address. This BAR is owned by
the Operating System, and allows the OS to locate the Thermal registers in system
memory space.
22.1.13 TBARH—Thermal Base High DWord Register
Address Offset: 14h17h Attribute: RW, RO
Default Value: 00000000h Size: 32 bits
This BAR extension holds the high 32 bits of the 64 bit TBAR. In conjunction with TBAR,
it creates 4 KB of memory space to signify the base address of Thermal memory
mapped configuration registers.
Bit Description
31:12
Thermal Base Address (TBA)—RW. This field provides the base address for the
Thermal logic memory mapped configuration registers. 4 KB bytes are requested by
hardwiring bits 11:4 to 0s.
11:4 Reserved
3Prefetchable (PREF)—RO. Indicates that this BAR is NOT pre-fetchable.
2:1 Address Range (ADDRNG)—RO. Indicates that this BAR can be located anywhere in
64 bit address space.
0Space Type (SPTYP)—RO. Indicates that this BAR is located in memory space.
Bit Description
31:0 Thermal Base Address High (TBAH)—R/W. TBAR bits 63:32.
Thermal Sensor Registers (D31:F6)
864 Datasheet
22.1.14 SVID—Subsystem Vendor ID Register
Address Offset: 2Ch2Dh Attribute: R/WO
Default Value: 0000h Size: 16 bits
This register should be implemented for any function that could be instantiated more
than once in a given system. The SVID register, in combination with the Subsystem ID
register, enables the operating environment to distinguish one subsystem from the
other(s).
Software (BIOS) will write the value to this register. After that, the value can be read,
but writes to the register will have no effect. The write to this register should be
combined with the write to the SID to create one 32-bit write. This register is not
affected by D3HOT to D0 reset.
22.1.15 SID—Subsystem ID Register
Address Offset: 2Eh2Fh Attribute: R/WO
Default Value: 0000h Size: 16 bits
This register should be implemented for any function that could be instantiated more
than once in a given system. The SID register, in combination with the Subsystem
Vendor ID register make it possible for the operating environment to distinguish one
subsystem from the other(s).
Software (BIOS) will write the value to this register. After that, the value can be read,
but writes to the register will have no effect. The write to this register should be
combined with the write to the SVID to create one 32-bit write. This register is not
affected by D3HOT to D0 reset.
22.1.16 CAP_PTR—Capabilities Pointer Register
Address Offset: 34h Attribute: RO
Default Value: 50h Size: 8 bits
Bit Description
15:0 SVID (SVID)—R/WO. These RWO bits have no PCH functionality.
Bit Description
15:0 SID (SAID)R/WO. These RWO bits have no PCH functionality.
Bit Description
7:0 Capability Pointer (CP)—RO. Indicates that the first capability pointer offset is offset
50h (Power Management Capability).
Datasheet 865
Thermal Sensor Registers (D31:F6)
22.1.17 Offset 3Ch – INTLN—Interrupt Line Register
Address Offset: 3Ch Attribute: RW
Default Value: 00h Size: 8 bits
22.1.18 INTPN—Interrupt Pin Register
Address Offset: 3Dh Attribute: RO
Default Value: See description Size: 8 bits
22.1.19 TBARB—BIOS Assigned Thermal Base Address Register
Address Offset: 40h43h Attribute: RW,RO
Default Value: 00000004h Size: 32 bits
This BAR creates 4 KB of memory space to signify the base address of Thermal memory
mapped configuration registers. This memory space is active when TBARB.SPTYPEN is
asserted. This BAR is owned by the BIOS, and allows the BIOS to locate the Thermal
registers in system memory space. If both TBAR and TBARB are programmed, then the
OS and BIOS each have their own independent “view” of the Thermal registers, and
must use the TSIU register to denote Thermal registers ownership/availability.
Bit Description
7:0 Interrupt Line—RW. PCH hardware does not use this field directly. It is used to
communicate to software the interrupt line that the interrupt pin is connected to.
Bit Description
7:4 Reserved
3:0 Interrupt Pin—RO. This reflects the value of the Device 31 interrupt pin bits 27:24
(TTIP) in chipset configuration space.
Bit Description
31:12
Thermal Base Address (TBA)—RW. This field provides the base address for the
Thermal logic memory mapped configuration registers. 4K B bytes are requested by
hardwiring bits 11:4 to 0s.
11:4 Reserved
3Prefetchable (PREF)—RO. Indicates that this BAR is NOT pre-fetchable.
2:1 Address Range (ADDRNG)—RO. Indicates that this BAR can be located anywhere in
64 bit address space.
0
Space Type Enable (SPTYPEN)—RW.
0 = Disable.
1 = Enable. When set to 1b by software, enables the decode of this memory BAR.
Thermal Sensor Registers (D31:F6)
866 Datasheet
22.1.20 TBARBH—BIOS Assigned Thermal Base High DWord
Register
Address Offset: 44h47h Attribute: RW
Default Value: 00000000h Size: 32 bits
This BAR extension holds the high 32 bits of the 64 bit TBARB.
22.1.21 PID—PCI Power Management Capability ID Register
Address Offset: 50h51h Attribute: RO
Default Value: 8001h Size: 16 bits
22.1.22 PC—Power Management Capabilities Register
Address Offset: 52h53h Attribute: RO
Default Value: 0023h Size: 16 bits
Bit Description
31:0 Thermal Base Address High (TBAH)—RW. TBAR bits 61:32.
Bit Description
15:8 Next Capability (NEXT)—RO. Indicates that this is the last capability structure in the
list.
7:0 Cap ID (CAP)—RO. Indicates that this pointer is a PCI power management capability
Bit Description
15:11 PME_Support—RO. Indicates PME# is not supported
10 D2_Support—RO. The D2 state is not supported.
9D1_Support—RO. The D1 state is not supported.
8:6 Aux_Current—RO. PME# from D3COLD state is not supported, therefore this field is
000b.
5Device Specific Initialization (DSI)—RO. Indicates that device-specific initialization
is required.
4Reserved
3 PME Clock (PMEC)—RO. Does not apply. Hardwired to 0.
2:0 Version (VS)—RO. Indicates support for Revision 1.2 of the PCI Power Management
Specification.
Datasheet 867
Thermal Sensor Registers (D31:F6)
22.1.23 PCS—Power Management Control And Status Register
Address Offset: 54h57h Attribute: RW, RO
Default Value: 0008h Size: 32 bits
Bit Description
31:24 Data—RO. Does not apply. Hardwired to 0s.
23 Bus Power/Clock Control Enable (BPCCE)—RO. Hardwired to 0.
22 B2/B3 Support (B23)—RO. Does not apply. Hardwired to 0.
21:16 Reserved
15 PME Status (PMES)—RO. This bit is always 0, since this PCI Function does not
generate PME#
14:9 Reserved
8PME Enable (PMEE)—RO. This bit is always zero, since this PCI Function does not
generate PME#
7:4 Reserved
3
No Soft Reset—RO. When set 1, this bit indicates that devices transitioning from
D3HOT to D0 because of PowerState commands do not perform an internal reset.
Configuration context is preserved. Upon transition from D3HOT to D0 initialized state,
no additional operating system intervention is required to preserve Configuration
Context beyond writing the PowerState bits.
2Reserved
1:0
Power State (PS)R/W. This field is used both to determine the current power state
of the Thermal controller and to set a new power state. The values are:
00 = D0 state
11 = D3HOT state
If software attempts to write a value of 10b or 01b in to this field, the write operation
must complete normally; however, the data is discarded and no state change occurs.
When in the D3HOT states, the Thermal controllers configuration space is available, but
the I/O and memory spaces are not. Additionally, interrupts are blocked.
When software changes this value from the D3HOT state to the D0 state, no internal
warm (soft) reset is generated.
Thermal Sensor Registers (D31:F6)
868 Datasheet
22.2 Thermal Memory Mapped Configuration Registers
(Thermal Sensor – D31:F26)
The base memory for these thermal memory mapped configuration registers is
specified in the TBARB (D31:F6:Offset 40h). The individual registers are then
accessible at TBARB + Offset.
Table 22-2. Thermal Memory Mapped Configuration Register Address Map (Sheet 1 of 2)
Offset Mnemonic Register Name Default Type
0h TSIU Thermal Sensor In Use 00h RO,R/W
1h TSE Thermal Sensor Enable 00h R/W
2h TSS Thermal Sensor Status 00h R/W
3h TSTR Thermal Sensor Thermometer Read FFh RO
4h TSTTP Thermal Sensor Temperature Trip Point 00000000h R/W
8h TSC0 Thermal Sensor Catastrophic Lock Down 00h R/W
0Ch TSES Thermal Sensor Error Status 00h R/WC
0Dh TSGPEN Thermal Sensor General Purpose Event
Enable 00h R/W
0Eh TSPC Thermal Sensor Policy Control 00h R/W, RO
10h PPEC Processor Power Error Correction (Mobile
Only) 0000h R/W
12h CTA Processor Core Temperature Adjust 0000h R/W
16h MGTA Memory Controller/Graphics
Temperature Adjust 0000h R/W
1Ah TRC Thermal Reporting Control 0000h R/W
20h TES Turbo Interrupt Status (Mobile Only) 00h R/WC, RO
21h TEN Turbo Interrupt Enable (Mobile Only) 00h R/W, RO
24h PSC Power Sharing Configuration (Mobile
Only) 00000000h R/W
30h CTV1 Core Temperature Value 1 0000h RO
32h CTV2 Core Temperature Value 2 0000h RO
34h CEV1 Core Energy Value 1 00000000h RO
3Fh AE Alert Enable 00h R/W
50h HTS Host Status (Mobile Only) 00000000000
0h R/W
56h PTL Processor Temperature Limit (Mobile
Only) 0000h R/W
58h MGTV Memory Controller/Graphics
Temperature Value
00000000000
00000h RO
60h PTV Processor Temperature Value 0000h RO
64h MMGPC Max Memory Controller/Graphics Power
Clamp (Mobile Only) 0000h R/W
66h MPPC Max Processor Power Clamp (Mobile
Only) 0000h R/W
Datasheet 869
Thermal Sensor Registers (D31:F6)
22.2.1 TSIU—Thermal Sensor In Use Register
Offset Address: TBARB+00h Attribute: RO, R/W
Default Value: 00h Size: 8 bit
22.2.2 TSE—Thermal Sensor Enable Register
Offset Address: TBARB+01h Attribute: R/W
Default Value: 00h Size: 8 bit
68h MPCPC Max Processor Core Power Clamp (Mobile
Only) 0000h R/W
82h TSPIEN Thermal Sensor PCI Interrupt Event
enable 00h R/W
83h TSLOCK Thermal Sensor Register Lock Control 00h R/W
98h STS Turbo Status (Mobile Only) 00000000h RO
9Ch SEC Event Clear (Mobile Only) 00h RO, R/WO
A4h TC3 Thermal Compares 3 00000000h RO
A8h TC1 Thermal Compares 1 00000000h RO
ACh TC2 Thermal Compares 2 00000000h RO
B0 DTV DIMM Temperature Values 00000000h RO
D8h ITV Internal Temperature Values 00000000h RO
Table 22-2. Thermal Memory Mapped Configuration Register Address Map (Sheet 2 of 2)
Offset Mnemonic Register Name Default Type
Bit Description
7:1 Reserved
0
Thermal Sensor In Use (TSIU)—R/W. This is a SW semaphore bit.
After a core well reset, a read to this bit returns a 0. After the first read, subsequent
reads will return a 1.
A write of a 1 to this bit will reset the next read value to 0. Writing a 0 to this bit has
no effect.
Software can poll this bit until it reads a 0, and will then own the usage of the thermal
sensor. This bit has no other effect on the hardware, and is only used as a semaphore
among various independent software threads that may need to use the thermal
sensor. Software that reads this register but does not intend to claim exclusive access
of the thermal sensor must write a 1 to this bit if it reads a 0, to allow other software
threads to claim it.
Bit Description
7:0
Thermal Sensor Enable (TSE)R/W. BIOS programs this register to the value B8h
to enable the thermal sensor.
All other values are reserved.
Thermal Sensor Registers (D31:F6)
870 Datasheet
22.2.3 TSS—Thermal Sensor Status Register
Offset Address: TBARB+02h Attribute: RO
Default Value: 00h Size: 8 bit
22.2.4 TSTR—Thermal Sensor Thermometer Read Register
Offset Address: TBARB+03h Attribute: RO
Default Value: FFh Size: 8 bit
This register generally provides the calibrated temperature from the thermometer
circuit when the thermometer is enabled.
Bit Description
7
Catastrophic Trip Indicator (CTI)—RO.
0 = The temperature is below the catastrophic setting.
1 = The temperature is above the catastrophic setting.
6
Hot Trip Indicator (HTI)—RO.
0 = The temperature is below the Hot setting.
1 = The temperature is above the Hot setting.
5
Auxiliary Trip Indicator (ATI)—RO.
0 = The temperature is below the Auxiliary setting.
1 = The temperature is above the Auxiliary setting.
4 Reserved
3
Auxiliary2 Trip Indicator (ATI)—RO.
0 = The temperature is below the Auxiliary2 setting.
1 = The temperature is above the Auxiliary2 setting.
2:0 Reserved
Bit Description
7:0
Thermometer Reading (TR)—R/O. Value corresponds to the thermal sensor
temperature. This register has a straight binary encoding that ranges from 0 to FFh.
The value in this field is valid only if the TR value is between 00h and 7Fh.
Datasheet 871
Thermal Sensor Registers (D31:F6)
22.2.5 TSTTP—Thermal Sensor Temperature Trip Point Register
Offset Address: TBARB+04h Attribute: R/W
Default Value: 00000000h Size: 32 bit
22.2.6 TSCO—Thermal Sensor Catastrophic Lock-Down Register
Offset Address: TBARB+08h Attribute: R/W
Default Value: 00h Size: 8 bit
Bit Description
31:24
Auxiliary2 Trip Point Setting (A2TPS)—R/W. These bits set the Auxiliary2 trip
point.
These bits are lockable using programming the policy-lock down bit (bit 7) of TSPC
register.
23:16
Auxiliary Trip Point Setting (ATPS)—R/W. These bits set the Auxiliary trip point.
These bits are lockable using programming the policy-lock down bit (bit 7) of TSPC
register.
These bits may only be programmed from 0h to 7Fh. Setting bit 23 is illegal.
15:8
Hot Trip Point Setting (HTPS)—R/W. These bits set the Hot trip point.
These bits are lockable using programming the policy-lock down bit (bit 7) of TSPC
register.
NOTE: BIOS should program to 3Ah for setting Hot Trip Point to 108 °C.
7:0
Catastrophic Trip Point Setting (CTPS)—R/W. These bits set the catastrophic trip
point.
These bits are lockable using TSCO.bit 7.
NOTE: BIOS should program to 2Bh for setting Catastrophic Trip Point to 120 °C.
Bit Description
7
Lock bit for Catastrophic (LBC)—R/W.
0 = Catastrophic programming interface is unlocked
1 = Locks the Catastrophic programming interface including TSTTP.bits[7:0].
This bit may only be set to a 0 by a host partitioned reset (note that CF9 warm reset is
a host partitioned reset). Writing a 0 to this bit has no effect.
TSCO.[7] is unlocked by default and can be locked through BIOS.
6:0 Reserved
Thermal Sensor Registers (D31:F6)
872 Datasheet
22.2.7 TSES—Thermal Sensor Error Status Register
Offset Address: TBARB+0Ch Attribute: R/WC
Default Value: 00h Size: 8 bit
Bit Description
7
Auxiliary2 High-to-LowEvent—R/WC.
0 = No trip occurs.
1 = Indicates that an Auxiliary2 Thermal Sensor trip event occurred based on a higher
to lower temperature transition through the trip point.
Software must write a 1 to clear this status bit.
6
Catastrophic High-to-LowEvent—R/WC.
0 = No trip occurs.
1 = Indicates that a Catastrophic Thermal Sensor trip event occurred based on a
higher to lower temperature transition through the trip point.
1 = Software must write a 1 to clear this status bit.
5
Hot High-to-LowEvent—R/WC.
0 = No trip occurs.
1 = Indicates that a Hot Thermal Sensor trip event occurred based on a higher to
lower temperature transition through the trip point.
Software must write a 1 to clear this status bit.
4
Auxiliary High-to-LowEvent—R/WC.
0 = No trip occurs.
1 = Indicates that an Auxiliary Thermal Sensor trip event occurred based on a higher
to lower temperature transition through the trip point.
Software must write a 1 to clear this status bit.
3
Auxiliary2 Low-to-High Event—R/WC.
0 = No trip occurs.
1 = Indicates that an Auxiliary2 Thermal Sensor trip event occurred based on a lower
to higher temperature transition through the trip point.
Software must write a 1 to clear this status bit.
2
Catastrophic Low-to-High Event—R/WC.
0 = No trip occurs.
1 = Indicates that a Catastrophic Thermal Sensor trip event occurred based on a lower
to higher temperature transition through the trip point.
Software must write a 1 to clear this status bit.
1
Hot Low-to-High Event—R/WC.
0 = No trip occurs.
1 = Indicates that a hot Thermal Sensor trip event occurred based on a lower to
higher temperature transition through the trip point.
Software must write a 1 to clear this status bit.
0
Auxiliary Low-to-High Event—R/WC.
0 = No trip occurs.
1 = Indicates that an Auxiliary Thermal Sensor trip event occurred based on a lower to
higher temperature transition through the trip point.
Software must write a 1 to clear this status bit.
Datasheet 873
Thermal Sensor Registers (D31:F6)
22.2.8 TSGPEN—Thermal Sensor General Purpose Event
Enable Register
Offset Address: TBARB+0Dh Attribute: R/W
Default Value: 00h Size: 8 bit
This register controls the conditions that result in General Purpose events to be
signalled from Thermal Sensor trip events.
Bit Description
7
Auxiliary2 High-to-Low Enable—R/W.
0 = Corresponding status bit does not result in General Purpose event.
1 = General purpose event is signaled when the corresponding status bit is set in the
Thermal Error Status Register.
6
Catastrophic High-to-Low Enable—R/W.
0 = Corresponding status bit does not result in General Purpose event.
1 = General purpose event is signaled when the corresponding status bit is set in the
Thermal Error Status Register.
5
Hot High-to-Low Enable—R/W.
0 = Corresponding status bit does not result in General Purpose event.
1 = General purpose event is signaled when the corresponding status bit is set in the
Thermal Error Status Register.
4
Auxiliary High-to-Low Enable—R/W.
0 = Corresponding status bit does not result in General Purpose event.
1 = General purpose event is signaled when the corresponding status bit is set in the
Thermal Error Status Register.
3
Auxiliary2 Low-to-High Enable—R/W.
0 = Corresponding status bit does not result in General Purpose event.
1 = General purpose event is signaled when the corresponding status bit is set in the
Thermal Error Status Register.
2
Catastrophic Low-to-High Enable—R/W.
0 = Corresponding status bit does not result in General Purpose event.
1 = General purpose event is signaled when the corresponding status bit is set in the
Thermal Error Status Register.
1
Hot Low-to-High Enable—R/W.
0 = Corresponding status bit does not result in General Purpose event.
1 = General purpose event is signaled when the corresponding status bit is set in the
Thermal Error Status Register.
0
Auxiliary Low-to-High Enable—R/W.
0 = Corresponding status bit does not result in General Purpose event.
1 = General purpose event is signaled when the corresponding status bit is set in the
Thermal Error Status Register.
Thermal Sensor Registers (D31:F6)
874 Datasheet
22.2.9 TSPC—Thermal Sensor Policy Control Register
Offset Address: TBARB+0Eh Attribute: R/W, RO
Default Value: 00h Size: 8 bit
22.2.10 PPEC—Processor Power Error Correction Register
(Mobile Only)
Offset Address: TBARB+10h Attribute: R/W
Default Value: 0000h Size: 16 bit
Bit Description
7
Policy Lock-Down Bit—R/W.
0 = This register can be programmed and modified.
1 = Prevents writes to this register and TSTTP.bits [31:16] (offset 04h).
NOTE: TSCO.bit 7 (offset 08h) and TSLOCK.bit2 (offset 83h) must also be 1 when this
bit is set to 1.
This bit is reset to 0 by a host partitioned reset (note that CF9 warm reset is a host
partitioned reset). Writing a 0 to this bit has no effect.
6
Catastrophic Power-Down EnableR/W.
When set to 1, the power management logic unconditionally transitions to the S5 state
when a catastrophic temperature is detected by the sensor.
NOTE: BIOS should set this bit to 1 to enable Catastrophic power-down.
5:4 Reserved
3
SMI Enable on Auxiliary2 Thermal Sensor Trip—R/W.
0 = Disables SMI# assertion for Auxiliary2 Thermal Sensor events.
1 = Enables SMI# assertions on Auxiliary2 Thermal Sensor events for either low-to-
high or high-to-low events. (Both edges are enabled by this bit.)
2
SMI Enable on Catastrophic Thermal Sensor Trip—R/W.
0 = Disables SMI# assertion for Catastrophic Thermal Sensor events.
1 = Enables SMI# assertions on Catastrophic Thermal Sensor events for either low-to-
high or high-to-low events. (Both edges are enabled by this bit.)
1
SMI Enable on Hot Thermal Sensor Trip—R/W.
0 = Disables SMI# assertion for Hot Thermal Sensor events.
1 = Enables SMI# assertions on Hot Thermal Sensor events for either low-to-high or
high-to-low events. (Both edges are enabled by this bit.)
0
SMI Enable on Auxiliary Thermal Sensor Trip—R/W.
0 = Disables SMI# assertion for Auxiliary Thermal Sensor events.
1 = Enables SMI# assertions on Auxiliary Thermal Sensor events for either low-to-
high or high-to-low events. (Both edges are enabled by this bit.)
Bit Description
15:0 Processor Power Error Correction Data—R/W.
The register is locked by AE.bit7 (offset 3Fh).
Datasheet 875
Thermal Sensor Registers (D31:F6)
22.2.11 CTA—Processor Core Temperature Adjust Register
Offset Address: TBARB+12h Attribute: R/W
Default Value: 0000h Size: 16 bit
22.2.12 PTA—PCH Temperature Adjust Register
Offset Address: TBARB+14h Attribute: R/W
Default Value: 0000h Size: 16 bit
22.2.13 MGTA—Memory Controller/Graphics Temperature
Adjust Register
Offset Address: TBARB+16h Attribute: R/W
Default Value: 0000h Size: 16 bit
Bit Description
15:0
Processor Core Temperature Adjust (CTA)—R/W. BIOS writes the processor core's
TJmax (from the processor MSR) into this register. Intel® ME FW uses the value to
create the processor core's absolute temperature.
Note that the value received from the processor core over PECI is a negative offset
relative to the CTA value.
The register is locked by AE.bit7 (offset 3Fh).
Bit Description
15:8
PCH Slope—R/W. This field contains the PCH slope for calculating PCH temperature.
The bits are locked by AE.bit7 (offset 3Fh).
NOTE: When thermal reporting is enabled, BIOS must write 80h into this field.
7:0
Offset—R/W. This field contains the PCH offset for calculating PCH temperature.
The bits are locked by AE.bit7 (offset 3Fh).
NOTE: When thermal reporting is enabled, BIOS must write 8Ch into this field.
Bit Description
15:8
Memory Controller/Graphics Slope—R/W. This field contains the Memory
Controller/Graphics slope for calculating the Memory Controller/Graphics temperature.
The bits are locked by AE.bit7 (offset 3Fh).
7:0
Offset—R/W. This field contains the Memory Controller/Graphics offset for calculating
the Memory Controller/Graphics temperature.
The bits are locked by AE.bit7 (offset 3Fh).
Thermal Sensor Registers (D31:F6)
876 Datasheet
22.2.14 TRC—Thermal Reporting Control Register
Offset Address: TBARB+1Ah Attribute: R/W
Default Value: 0000h Size: 16 bit
Bit Description
15
Processor Core #2 Temperature Read Enable—R/W. In systems with 2
processors, when set to 1, the bit will enable reads of the 2nd processor core
temperature.
13:14 Reserved
12
Thermal Data Reporting Enable—R/W.
0 = Disable
1 = Enable
11:9 Reserved
8
C6 Workaround Enable—R/W. Setting this bit enables PECI to work with Lynnfield
and Clarksfield Processors that can provide bad readings when they are in C6. This
workaround will bring the Processor Core out of C6 while the PECI transaction is in
progress, and then return the Processor Core to the C6 state after completing the PECI
transaction.
7
Processor Core Temperature Read Enable—R/W.
0 = Disables reads of the processor core temperature
1 = Enables reads of the processor core temperature.
6
Processor Core Energy Read Enable—R/W
0 = Disables reads of the processor core energy values.
1 = Enables reads of the processor core energy values.
5
PCH Temperature Read Enable—R/W
0 = Disables reads of the PCH temperature.
1 = Enables reads of the PCH temperature.
4
Memory Controller/Graphics Temperature Read Enable—R/W
0 = Disables reads of Memory Controller/Graphics temperature.
1 = Enables reads of Memory Controller/Graphics temperature.
3
DIMM4 Temperature Read Enable—R/W
0 = Disables reads of DIMM4 temperature.
1 = Enables reads of DIMM4 temperature.
2
DIMM3 Temperature Read Enable—R/W
0 = Disables reads of DIMM3 temperature.
1 = Enables reads of DIMM3 temperature.
1
DIMM2 Temperature Read Enable—R/W
0 = Disables reads of DIMM2 temperature.
1 = Enables reads of DIMM2 temperature.
0
DIMM1 Temperature Read Enable—R/W
0 = Disables reads of DIMM1 temperature.
1 = Enables reads of DIMM1 temperature.
Datasheet 877
Thermal Sensor Registers (D31:F6)
22.2.15 TES—Turbo Interrupt Status Register (Mobile Only)
Offset Address: TBARB+20h Attribute: R/WC, RO
Default Value: 00h Size: 8 bit
22.2.16 TEN—Turbo Interrupt Enable Register (Mobile Only)
Offset Address: TBARB+21h Attribute: R/W, RO
Default Value: 00h Size: 8 bit
22.2.17 PSC—Power Sharing Configuration Register (Mobile Only)
Offset Address: TBARB+24h Attribute: R/W
Default Value: 00000000h Size: 32 bit
This register is R/W to the host and has no H/W functionality in the PCH.
This register is programmed by BIOS during boot to indicate BIOS's preferences and
behavior for the Intelligent Power Sharing driver. See the Intelligent Power Sharing
BIOS Specification for bit definitions.
Bit Description
7:1 Reserved
0
Update Status—R/WC. The bit indicates updates over SMLink1 to Host has occurred.
When set, it indicates that the Intel® ME has written to the Turbo Status register.
Software must write a 1 to clear this bit.
NOTE: This bit is always set when the ME writes to the Turbo Status Register. If the
interrupt is enabled in TEN, then an interrupt is sent to the host. There is only
one interrupt bit that covers any write to the Turbo Status Register.
Bit Description
7:1 Reserved
0
Update Interrupt Enable—R/W. When set, the bit enables interrupt for updates over
SMLink1, so that updates to the Turbo Status register by an external controller are
signaled to the host.
Thermal Sensor Registers (D31:F6)
878 Datasheet
22.2.18 CTV1—Core Temperature Value 1 Register
Offset Address: TBARB+30h Attribute: RO
Default Value: 0000h Size: 16 bit
22.2.19 CTV2—Core Temperature Value 2 Register
Offset Address: TBARB+32h Attribute: RO
Default Value: 0000h Size: 16 bit
22.2.20 CEV1—Core Energy Value Register
Offset Address: TBARB+34h Attribute: RO
Default Value: 00000000h Size: 32 bit
Bit Description
15:6
Processor Core Temperature—RO. This field provides the processor core
temperature.
Bit 15, when set, indicates an illegal value or error in reading the processor core.
Bits[13:6] contain the integer component (0 to 255) of the processor core
temperature.
5:0 Fraction Value—RO. These bits contains the fraction Value (in 1/64th) of the
processor core temperature.
Bit Description
15:6
Processor Core #2 Temperature—RO. This field provides the processor core
temperature of the second processor if present.
Bit 15, when set, indicates an illegal value or error in reading the processor core.
Bits[13:6] contain the integer component (0 to 255) of the processor core
temperature.
5:0 Fraction Value—RO. These bits contains the fraction Value (in 1/64th) of the
processor core temperature.
Bit Description
31:0
Processor Core Energy—RO. This field provides the processor core energy.
NOTE: Divide decimal value by 65535 to obtain Processor Core Energy in Joules.
Processor Core power is then calculated by the difference between two
Processor Core Energy Value readings in Joules, divided by the time interval in
seconds.
Datasheet 879
Thermal Sensor Registers (D31:F6)
22.2.21 AE—Alert Enable Register
Offset Address: TBARB+3Fh Attribute: R/W
Default Value: 00h Size: 8 bit
22.2.22 HTS—Host Status Register (Mobile Only)
Offset Address: TBARB+50h Attribute: R/W
Default Value: 000000000000h Size: 48 bit
This register represents the data byte [19:14] provided to the external controller when
it does a read. Byte 14 is bit [7:0]. See Section 5.21.2.3 for more details.
Bit Description
7
Lock Enable—R/W.
0 = Lock Disabled.
1 = Lock Enabled. This will lock this register (including this bit) and the following
registers: PPEC (offset 10h), CTA (offset 12h), and MGTA (offset 16h).
This bit is reset by a Host Partitioned Reset. Note that CF9 warm reset is a Host
Partitioned Reset.
6
Processor Core Alert Enable—R/W.
When this bit is set, it will assert the PCH’s TEMP_ALERT# pin if the processor core
temperature is outside the temperature limits.
This bit is lockable by bit 7 in this register.
5
Memory Controller/Graphics Alert Enable—R/W.
When this bit is set, it will assert the PCH’s TEMP_ALERT# pin if the Memory
Controller/graphics temperature is outside the temperature limits.
This bit is lockable by bit 7 in this register.
4
PCH Alert Enable—R/W.
When this bit is set, it will assert the PCH’s TEMP_ALERT# pin if the PCH temperature
is outside the temperature limits.
This bit is lockable by bit 7 in this register.
3
DIMM Alert Enable—R/W.
When this bit is set, it will assert the PCH’s TEMP_ALERT# pin if DIMM1-4 temperature
is outside of the temperature limits.
Note that the actual DIMMs that are read and used for the alert are enabled in the TRC
register (offset 1Ah).
This bit is lockable by bit 7 in this register.
NOTE: Same Upper and Lower limits for triggering TEMP_ALERT# are used for all
enabled DIMMs in the system.
2:0 Reserved
Thermal Sensor Registers (D31:F6)
880 Datasheet
22.2.23 PTL—Processor Temperature Limit Register (Mobile Only)
Offset Address: TBARB+56h Attribute: R/W
Default Value: 0000h Size: 16 bit
22.2.24 MGTV—Memory Controller/Graphics Temperature
Value Register
Offset Address: TBARB+58h Attribute: RO
Default Value: 0000000000000000h Size: 64 bit
22.2.25 PTV—Processor Temperature Value Register
Offset Address: TBARB+60h Attribute: RO
Default Value: 0000h Size: 16 bit
22.2.26 MMGPC—Max Memory Controller/Graphics Power Clamp
Register (Mobile Only)
Offset Address: TBARB+64h Attribute: R/W
Default Value: 0000h Size: 16 bit
Bit Description
15:0 Processor Temperature Limit—R/W. These bits are programmed by BIOS.
This bit is a scratchpad register for SW.
Bit Description
63:0 Memory Controller/Graphics Temperature Value—RO. These bits contain the
Memory Controller/Graphics temperature.
Bit Description
15:8 Reserved
7:0 Processor Temperature Value—RO. These bits contain the max temperature value
of the processor core and the memory controller/graphics.
Bit Description
15:0 Max Memory Controller/Graphics Power Clamp—R/W. These bits set the max
memory controller/graphics power.
Datasheet 881
Thermal Sensor Registers (D31:F6)
22.2.27 MPPC—Max Processor Power Clamp Register (Mobile Only)
Offset Address: TBARB+66h Attribute: R/W
Default Value: 0000h Size: 16 bit
22.2.28 MPCPC—Max Processor Core Power Clamp Register
(Mobile Only)
Offset Address: TBARB+68h Attribute: R/W
Default Value: 0000h Size: 16 bit
Bit Description
15:0 Max Processor Power Clamp—R/W. These bits set the max processor power.
Bit Description
15:0 Max Processor Core Power Clamp—R/W. These bits set the max processor core
power.
Thermal Sensor Registers (D31:F6)
882 Datasheet
22.2.29 TSPIEN—Thermal Sensor PCI Interrupt Enable Register
Offset Address: TBARB+82h Attribute: R/W
Default Value: 00h Size: 8 bit
This register controls the conditions that result in PCI interrupts to be signalled from
Thermal Sensor trip events. Software (device driver) needs to ensure that it can
support PCI interrupts, even though BIOS may enable PCI interrupt capability through
this register.
Bit Description
7
Auxiliary2 High-to-Low Enable—R/W.
0 = Corresponding status bit does not result in PCI interrupt.
1 = PCI interrupt is signaled when the corresponding status bit is set in the Thermal
Error Status Register.
6
Catastrophic High-to-Low Enable—R/W.
0 = Corresponding status bit does not result in PCI interrupt.
1 = PCI interrupt is signaled when the corresponding status bit is set in the Thermal
Error Status Register.
5
Hot High-to-Low Enable—R/W.
0 = Corresponding status bit does not result in PCI interrupt.
1 = PCI interrupt is signaled when the corresponding status bit is set in the Thermal
Error Status Register.
4
Auxiliary High-to-Low Enable—R/W.
0 = Corresponding status bit does not result in PCI interrupt.
1 = PCI interrupt is signaled when the corresponding status bit is set in the Thermal
Error Status Register.
3
Auxiliary2 Low-to-High Enable—R/W.
0 = Corresponding status bit does not result in PCI interrupt.
1 = PCI interrupt is signaled when the corresponding status bit is set in the Thermal
Error Status Register.
2
Catastrophic Low-to-High EnableR/W.
0 = Corresponding status bit does not result in PCI interrupt.
1 = PCI interrupt is signaled when the corresponding status bit is set in the Thermal
Error Status Register.
1
Hot Low-to-High Enable—R/W.
0 = Corresponding status bit does not result in PCI interrupt.
1 = PCI interrupt is signaled when the corresponding status bit is set in the Thermal
Error Status Register.
0
Auxiliary Low-to-High Enable—R/W.
0 = Corresponding status bit does not result in PCI interrupt.
1 = PCI interrupt is signaled when the corresponding status bit is set in the Thermal
Error Status Register.
Datasheet 883
Thermal Sensor Registers (D31:F6)
22.2.30 TSLOCK—Thermal Sensor Register Lock Control Register
Offset Address: TBARB+83h Attribute: R/W
Default Value: 00h Size: 8 bit
22.2.31 STS—Turbo Status (Mobile Only)
Offset Address: TBARB+98h Attribute: RO
Default Value: 00000000h Size: 32 bit
Bits [31:1] in this register are received from the EC when it does the Write STS
Register Command. See Section 5.22.2 for more details
Note that Write STS Register Command is a 48-bit transaction. The upper bits [47:32]
of the write command are written into TC1 register at offset A8h.
22.2.32 SEC—Event Clear Register (Mobile Only)
Offset Address: TBARB+9Ch Attribute: RO, R/WO
Default Value: 00h Size: 8 bit
22.2.33 TC3—Thermal Compares 3 Register
Offset Address: TBARB+A4h Attribute: RO
Default Value: 00000000h Size: 32 bit
Bits [31:0] of this register are set when an external controller (such as EC) does the
Write Processor Core Temp Limits command. See Section 5.21.2 for more information.
Bit Description
7:3 Reserved
2
Lock Control—R/W. This bit can only be set to a 0 by a host-partitioned reset. Writing
a 0 to this bit has no effect.
NOTE: CF9 warm reset is a host-partitioned reset.
1:0 Reserved
Bit Description
7:1 Reserved
0Event Clear—R/WO. When the Host writes a 1 to this bit, it clears bit 0 of the Turbo
Status Register (STS.bit0, offset 98h)
Bit Description
31:16
Processor Core Thermal Compare Upper Limit—RO. This is the upper limit used
to compare against the processor core temperature. If the processor core temperature
is greater than this value, then the PCH’s TEMP_ALERT# signal is asserted if enabled.
15:0
Processor Core Thermal Compare Lower Limit—RO. This is the lower limit used
to compare against the processor core temperature. If the processor core temperature
is lower than this value, then the PCH’s TEMP_ALERT# signal is asserted if enabled.
Thermal Sensor Registers (D31:F6)
884 Datasheet
22.2.34 TC1—Thermal Compares 1 Register
Offset Address: TBARB+A8h Attribute: RO
Default Value: 00000000h Size: 32 bit
Bits [31:16] of this register are set when an external controller (such as EC) does the
Write STS Register Command. See Section 5.21.2 for more info. Note that the Write
STS Command are 48-bit transaction. The lower bits [31:0] are written into STS
register at offset 50h.
Bits [15:0] of this register are set when an external controller (such as EC) does the
Write Memory Controller/Graphics Temp Limits Command. See Section 5.21.2 for more
information.
Bit Description
31:26 Reserved
25:16
(Mobile
Only)
Processor Power Limit (PSL)R/W. The processor power limit encoded as a 10-bit,
unsigned real number with a 1/10th-Watt granularity.
Example: 60.0 Watts would be encoded as 258h
15:8
Memory Controller/Graphics Thermal Compare Upper Limit—RO. This is the
upper limit used to compare against the memory controller/graphics temperature. If
the memory controller/graphics temperature is greater than this value, then the PCH’s
TEMP_ALERT# signal is asserted if enabled.
7:0
Memory Controller/Graphics Thermal Compare Lower Limit—RO. This is the
lower limit used to compare against the memory controller/graphics temperature. If
the memory controller/graphics temperature is lower than this value, then the PCH’s
TEMP_ALERT# signal is asserted if enabled.
Datasheet 885
Thermal Sensor Registers (D31:F6)
22.2.35 TC2—Thermal Compares 2 Register
Offset Address: TBARB+ACh Attribute: RO
Default Value: 00000000h Size: 32 bit
Bits [31:16] of this register are set when an external controller (such as, EC) does the
Write DIMM Temp Limits Command. See Section 5.21.2 for more info.
Bits [15:0] of this register are set when an external controller (such as EC) does the
Write PCH Temp Limits Command. See Section 5.21.2 for more information.
22.2.36 DTV—DIMM Temperature Values Register
Offset Address: TBARB+B0h Attribute: RO
Default Value: 00000000h Size: 32 bit
Bit Description
31:24
DIMM Thermal Compare Upper Limit—RO. This is the upper limit used to compare
against the DIMM’s temperature. If the DIMM’s temperature is greater than this value,
then the PCH’s TEMP_ALERT# signal is asserted if enabled.
23:16
DIMM Thermal Compare Lower Limit—RO. This is the lower limit used to compare
against the DIMM’s temperature. If the DIMMs temperature is lower than this value,
then the PCH’s TEMP_ALERT# signal is asserted if enabled.
15:8
PCH Thermal Compare Upper Limit—RO. This is the upper limit used to compare
against the PCH temperature. If the PCH temperature is greater than this value, then
the PCH’s TEMP_ALERT# signal is asserted if enabled.
7:0
PCH Thermal Compare Lower Limit—RO. This is the lower limit used to compare
against the PCH temperature. If the PCH temperature is lower than this value, then
the PCH’s TEMP_ALERT# signal is asserted if enabled.
Bit Description
31:24
DIMM3 Temperature—RO. The bits contain DIMM3 temperature data in absolute
degrees Celsius.
These bits are data byte 8 provided to the external controller when it does a read over
SMLink1. See Section 5.21.2 for more details.
23:16
DIMM2 Temperature—RO. The bits contain DIMM2 temperature data in absolute
degrees Celsius.
These bits are data byte 7 provided to the external controller when it does a read over
SMLink1. See Section 5.21.2 for more details.
15:8
DIMM1 Temperature—RO. The bits contain DIMM1 temperature data in absolute
degrees Celsius.
These bits are data byte 6 provided to the external controller when it does a read over
SMLink1. See Section 5.21.2 for more details.
7:0
DIMM0 Temperature—RO. The bits contain DIMM0 temperature data in absolute
degrees Celsius.
These bits are data byte 5 provided to the external controller when it does a read over
SMLink1. See Section 5.21.2 for more details.
Thermal Sensor Registers (D31:F6)
886 Datasheet
22.2.37 ITV—Internal Temperature Values Register
Offset Address: TBARB+D8h Attribute: RO
Default Value: 00000000h Size: 32 bit
§ §
Bit Description
31:24 Reserved
23:16
Sequence Number—RO. Provides a sequence number which can be used by the host
to detect if the ME FW has hung. The value will roll over to 00h from FFh. The count is
updated at approximately 200 ms. Host SW can check this value and if it isn't
incriminated over a second or so, software should assume that the ME FW is hung.
NOTE: if the ME is reset, then this value will not change during the reset. After the
reset is done, which may take up to 30 seconds, the ME may be on again and this
value will start incrementing, indicating that the thermal values are valid again.
These bits are data byte 9 provided to the external controller when it does a read over
SMLink1. See Section 5.21.2 for more details.
15:8
Memory Controller/Graphics Temperature—RO. The bits contain memory
controller/graphics temperature data in absolute degrees Celsius.
These bits are data byte 4 provided to the external controller when it does a read over
SMLink1. See Section 5.21.2 for more details.
7:0
PCH Temperature—RO. The bits contain PCH temperature data in absolute degrees
Celsius.
These bits are data byte 1 provided to the external controller when it does a read over
SMLink1. See Section 5.21.2 for more details.
Datasheet 887
Intel® Management Engine Interface (MEI) Subsystem Registers (D22:F0)
23 Intel® Management Engine
Interface (MEI) Subsystem
Registers (D22:F0)
23.1 First Intel® Management Engine Interface
(Intel® MEI) Configuration Registers
(MEI—D22:F0)
/
Table 23-1. Intel® MEI Configuration Registers Address Map
(MEI—D22:F0) (Sheet 1 of 2)
Offset Mnemonic Register Name Default Type
00h–01h VID Vendor Identification 8086h RO
02h–03h DID Device Identification See register
description RO
04h–05h PCICMD PCI Command 0000h R/W, RO
06h–07h PCISTS PCI Status 0010h RO
08h RID Revision Identification See register
description RO
09h–0Bh CC Class Code 0C8000h RO
0Eh HT Header Type 00h RO
10h–17h MEI0_MBAR MEI0 MMIO Base Address 00000000
00000004h R/W, RO
2Ch–2Dh SVID Subsystem Vendor ID 0000h R/WO
2Eh–2Fh SID Subsystem ID 0000h R/WO
34h CAPP Capabilities List Pointer 50h RO
3Ch–3Dh INTR Interrupt Information 0000h R/W, RO
3Eh–3Fh MLMG Maximum Latency/Minimum
Grant 0000h RO
40h–43h HFS Host Firmware Status 00000000h RO
44h–47h ME_UMA Management Engine UMA
Register 00000000h RO
48–4Bh GMES General ME Status 00000000h RO
4Ch–4Fh H_GS Host General Status 00000000h RO
50h–51h PID PCI Power Management
Capability ID 6001h RO
52h–53h PC PCI Power Management
Capabilities C803h RO
54h–55h PMCS PCI Power Management Control
and Status 0008h R/WC, R/W,
RO
8Ch–8Dh MID Message Signaled Interrupt
Identifiers 0005h RO
Intel® Management Engine Interface (MEI) Subsystem Registers (D22:F0)
888 Datasheet
23.1.1 VID—Vendor Identification Register
(MEI—D22:F0)
Address Offset: 00h01h Attribute: RO
Default Value: 8086h Size: 16 bits
23.1.2 DID—Device Identification Register
(MEI—D22:F0)
Address Offset: 02h–03h Attribute: RO
Default Value: See bit description Size: 16 bits
8Eh–8Fh MC Message Signaled Interrupt
Message Control 0080h R/W, RO
90h–93h MA Message Signaled Interrupt
Message Address 00000000h R/W, RO
94h–97h MUA Message Signaled Interrupt Upper
Address 00000000h R/W
98h–99h MD Message Signaled Interrupt
Message Data 0000h R/W
A0h HIDM MEI Interrupt Delivery Mode 00h R/W
BCh–BFh HERS MEI Extended Register Status 40000000h RO
C0h–DFh HER[1:8] MEI Extended Register DW[1:8] 00000000h RO
Table 23-1. Intel® MEI Configuration Registers Address Map
(MEI—D22:F0) (Sheet 2 of 2)
Offset Mnemonic Register Name Default Type
Bit Description
15:0 Vendor ID (VID)—RO. This is a 16-bit value assigned to Intel.
Bit Description
15:0
Device ID (DID)—RO. This is a 16-bit value assigned to the Intel Management Engine
Interface controller. See the Intel® 5 Series Chipset and Intel® 3400 Series Chipset
Specification Update for the value of the Device ID Register.
Datasheet 889
Intel® Management Engine Interface (MEI) Subsystem Registers (D22:F0)
23.1.3 PCICMD—PCI Command Register
(MEI—D22:F0)
Address Offset: 04h–05h Attribute: R/W, RO
Default Value: 0000h Size: 16 bits
23.1.4 PCISTS—PCI Status Register
(MEI—D22:F0)
Address Offset: 06h07h Attribute: RO
Default Value: 0010h Size: 16 bits
Bit Description
15:11 Reserved
10 Interrupt Disable (ID)—R/W. Disables this device from generating PCI line based
interrupts. This bit does not have any effect on MSI operation.
9:3 Reserved
2
Bus Master Enable (BME)—R/W.:
Controls the Intel MEI host controller's ability to act as a system memory master for
data transfers. When this bit is cleared, Intel ME bus master activity stops and any
active DMA engines return to an idle condition. This bit is made visible to firmware
through the H_PCI_CSR register, and changes to this bit may be configured by the
H_PCI_CSR register to generate an ME MSI. When this bit is 0, Intel MEI is blocked
from generating MSI to the host CPU.
NOTE: This bit does not block Intel MEI accesses to ME-UMA; that is, writes or reads to
the host and ME circular buffers through the read window and write window
registers still cause ME backbone transactions to ME-UMA.
1
Memory Space Enable (MSE)—R/W. Controls access to the Intel ME's memory
mapped register space.
0 = Disable. Memory cycles within the range specified by the memory base and limit
registers are master aborted.
1 = Enable. Allows memory cycles within the range specified by the memory base and
limit registers accepted.
0 Reserved
Bit Description
15:5 Reserved
4 Capabilities List (CL)—RO. Indicates the presence of a capabilities list, hardwired to 1.
3
Interrupt Status (IS)RO. Indicates the interrupt status of the device.
0 = Interrupt is de-asserted.
1 = Interrupt is asserted.
2:0 Reserved
Intel® Management Engine Interface (MEI) Subsystem Registers (D22:F0)
890 Datasheet
23.1.5 RID—Revision Identification Register
(MEI—D22:F0)
Offset Address: 08h Attribute: RO
Default Value: See bit description Size: 8 bits
23.1.6 CC—Class Code Register
(MEI—D22:F0)
Address Offset: 09h0Bh Attribute: RO
Default Value: 078000h Size: 24 bits
23.1.7 HTYPE—Header Type Register
(MEI—D22:F0)
Address Offset: 0Eh Attribute: RO
Default Value: 80h Size: 8 bits
Bit Description
7:0 Revision ID—RO. See the Intel® 5 Series Chipset and Intel® 3400 Series Chipset
Specification Update for the value of the Revision ID Register
Bit Description
23:16 Base Class Code (BCC)—RO. Indicates the base class code of the Intel MEI device.
15:8 Sub Class Code (SCC)—RO. Indicates the sub class code of the Intel MEI device.
7:0 Programming Interface (PI)—RO. Indicates the programming interface of the Intel
MEI device.
Bit Description
7Multi-Function Device (MFD)—RO.
Indicates the Intel MEI host controller is part of a multifunction device.
6:0 Header Layout (HL)—RO. Indicates that the Intel MEI uses a target device layout.
Datasheet 891
Intel® Management Engine Interface (MEI) Subsystem Registers (D22:F0)
23.1.8 MEI0_MBAR—MEI0 MMIO Base Address Register
(MEI—D22:F0)
Address Offset: 10h17h Attribute: R/W, RO
Default Value: 0000000000000004h Size: 64 bits
This register allocates space for the MEI0 memory mapped registers.
23.1.9 SVID—Subsystem Vendor ID Register
(MEI—D22:F0)
Address Offset: 2Ch2Dh Attribute: R/WO
Default Value: 0000h Size: 16 bits
23.1.10 SID—Subsystem ID Register
(MEI—D22:F0)
Address Offset: 2Eh2Fh Attribute: R/WO
Default Value: 0000h Size: 16 bits
Bit Description
63:4 Base Address (BA)—R/W. Software programs this field with the base address of this
region.
3Prefetchable Memory (PM)RO. Indicates that this range is not pre-fetchable.
2:1 Type (TP)—RO. Set to 10b to indicate that this range can be mapped anywhere in 64-
bit address space.
0Resource Type Indicator (RTE)—RO. Indicates a request for register memory
space.
Bit Description
15:0
Subsystem Vendor ID (SSVID)—R/WO. Indicates the sub-system vendor identifier.
This field should be programmed by BIOS during boot-up. Once written, this register
becomes Read Only. This field can only be cleared by PLTRST#.
Bit Description
15:0
Subsystem ID (SSID)—R/WO. Indicates the sub-system identifier. This field should
be programmed by BIOS during boot-up. Once written, this register becomes Read
Only. This field can only be cleared by PLTRST#.
Intel® Management Engine Interface (MEI) Subsystem Registers (D22:F0)
892 Datasheet
23.1.11 CAPP—Capabilities List Pointer Register
(MEI—D22:F0)
Address Offset: 34h Attribute: RO
Default Value: 50h Size: 8 bits
23.1.12 INTR—Interrupt Information Register
(MEI—D22:F0)
Address Offset: 3Ch–3Dh Attribute: R/W, RO
Default Value: 0100h Size: 16 bits
23.1.13 HFS—Host Firmware Status Register
(MEI—D22:F0)
Address Offset: 40h–43h Attribute: RO
Default Value: 00000000h Size: 32 bits
Bit Description
7:0 Capabilities Pointer (PTR)—RO. Indicates that the pointer for the first entry in the
capabilities list is at 50h in configuration space.
Bit Description
15:8 Interrupt Pin (IPIN)—RO. This indicates the interrupt pin the Intel MEI host
controller uses. The value of 01h selects INTA# interrupt pin.
7:0 Interrupt Line (ILINE)—R/W. Software written value to indicate which interrupt line
(vector) the interrupt is connected to. No hardware action is taken on this register.
Bit Description
31:0 Host Firmware Status (HFS)—RO. This register field is used by Firmware to reflect
the operating environment to the host.
Datasheet 893
Intel® Management Engine Interface (MEI) Subsystem Registers (D22:F0)
23.1.14 ME_UMA—Management Engine UMA Register
(MEI—D22:F0)
Address Offset: 44h–47h Attribute: RO
Default Value: 80000000h Size: 32 bits
23.1.15 GMES—General ME Status Register
(MEI—D22:F0)
Address Offset: 48h–4Bh Attribute: RO
Default Value: 00000000h Size: 32 bits
23.1.16 H_GS—Host General Status Register
(MEI—D22:F0)
Address Offset: 4Ch–4Fh Attribute: RO
Default Value: 00000000h Size: 32 bits
Bit Description
31 Reserved—RO. Hardwired to 1. Can be used by host software to discover that this
register is valid.
30:7 Reserved
16 ME UMA Size Valid—RO. This bit indicates that FW has written to the MUSZ field.
15:6 Reserved
5:0
ME UMA Size (MUSZ)—RO. This field reflect ME Firmware’s desired size of MEUMA
memory region. This field is set by ME firmware prior to core power bringup allowing
BIOS to initialize memory.
000000b = 0 MB, No memory allocated to MEUMA
000001b = 1 MB
000010b = 2 MB
000100b = 4 MB
001000b = 8 MB
010000b = 16 MB
100000b = 32 MB
Bit Description
31:0 General ME Status (ME_GS)—RO. This field is populated by ME.
Bit Description
31:0 Host General Status(H_GS)—RO. General Status of Host, this field is not used by
Hardware
Intel® Management Engine Interface (MEI) Subsystem Registers (D22:F0)
894 Datasheet
23.1.17 PID—PCI Power Management Capability ID Register
(MEI—D22:F0)
Address Offset: 50h–51h Attribute: RO
Default Value: 6001h Size: 16 bits
23.1.18 PC—PCI Power Management Capabilities Register
(MEI—D22:F0)
Address Offset: 52h53h Attribute: RO
Default Value: C803h Size: 16 bits
Bit Description
15:8 Next Capability (NEXT)—RO. Value of 60h indicates the location of the next pointer.
7:0 Capability ID (CID)—RO. Indicates the linked list item is a PCI Power Management
Register.
Bit Description
15:11
PME_Support (PSUP)—RO. This five-bit field indicates the power states in which the
function may assert PME#. Intel MEI can assert PME# from any D-state except D1 or
D2 which are not supported by Intel MEI.
10:9 Reserved
8:6 Aux_Current (AC)—RO. Reports the maximum Suspend well current required when in
the D3cold state. Value of 00b is reported.
5Device Specific Initialization (DSI)—RO. Indicates whether device-specific
initialization is required.
4Reserved
3PME Clock (PMEC)—RO. Indicates that PCI clock is not required to generate PME#.
2:0 Version (VS)—RO. Hardwired to 011b to indicate support for Revision 1.2 of the PCI
Power Management Specification.
Datasheet 895
Intel® Management Engine Interface (MEI) Subsystem Registers (D22:F0)
23.1.19 PMCS—PCI Power Management Control and Status
Register (MEI—D22:F0)
Address Offset: 54h55h Attribute: R/WC, R/W, RO
Default Value: 0008h Size: 16 bits
23.1.20 MID—Message Signaled Interrupt Identifiers Register
(MEI—D22:F0)
Address Offset: 8Ch–8Dh Attribute: RO
Default Value: 0005h Size: 16 bits
Bit Description
15
PME Status (PMES)—R/WC. Bit is set by ME Firmware. Host software clears bit by
writing ‘1’ to bit.
This bit is reset when CL_RST1# asserted.
14:9 Reserved
8
PME Enable (PMEE)—R/W. This bit is read/write and is under the control of host SW.
It does not directly have an effect on PME events. However, this bit is shadowed so ME
FW can monitor it. ME FW will not cause the PMES bit to transition to 1 while the PMEE
bit is 0, indicating that host SW had disabled PME.
This bit is reset when PLTRST# asserted.
7:4 Reserved
3
No_Soft_Reset (NSR)—RO. This bit indicates that when the Intel MEI host controller
is transitioning from D3hot to D0 due to a power state command, it does not perform an
internal reset. Configuration context is preserved.
2 Reserved
1:0
Power State (PS)R/W. This field is used both to determine the current power state
of the Intel MEI host controller and to set a new power state. The values are:
00 = D0 state (default)
11 = D3hot state
The D1 and D2 states are not supported for the Intel MEI host controller. When in the
D3hot state, the Intel ME’s configuration space is available, but the register memory
spaces are not. Additionally, interrupts are blocked.
Bit Description
15:8 Next Pointer (NEXT)—RO. Value of 00h indicates that this is the last item in the list.
7:0 Capability ID (CID)—RO. Capabilities ID indicates MSI.
Intel® Management Engine Interface (MEI) Subsystem Registers (D22:F0)
896 Datasheet
23.1.21 MC—Message Signaled Interrupt Message Control Register
(MEI—D22:F0)
Address Offset: 8Eh–8Fh Attribute: R/W, RO
Default Value: 0080h Size: 16 bits
23.1.22 MA—Message Signaled Interrupt Message Address
Register (MEI—D22:F0)
Address Offset: 90h–93h Attribute: R/W, RO
Default Value: 00000000h Size: 32 bits
23.1.23 MUA—Message Signaled Interrupt Upper Address Register
(MEI—D22:F0)
Address Offset: 94h–97h Attribute: R/W
Default Value: 00000000h Size: 32 bits
23.1.24 MD—Message Signaled Interrupt Message Data Register
(MEI—D22:F0)
Address Offset: 98h–99h Attribute: R/W
Default Value: 0000h Size: 16 bits
Bit Description
15:8 Reserved
764 Bit Address Capable (C64)—RO. Specifies that function is capable of generating
64-bit messages.
6:1 Reserved
0MSI Enable (MSIE)—R/W. If set, MSI is enabled and traditional interrupt pins are not
used to generate interrupts.
Bit Description
31:2 Address (ADDR)—R/W. Lower 32 bits of the system specified message address,
always DW aligned.
1:0 Reserved
Bit Description
31:0 Upper Address (UADDR)—R/W. Upper 32 bits of the system specified message
address, always DW aligned.
Bit Description
15:0
Data (DATA)—R/W. This 16-bit field is programmed by system software if MSI is
enabled. Its content is driven during the data phase of the MSI memory write
transaction.
Datasheet 897
Intel® Management Engine Interface (MEI) Subsystem Registers (D22:F0)
23.1.25 HIDM—MEI Interrupt Delivery Mode Register
(MEI—D22:F0)
Address Offset: A0h Attribute: R/W
Default Value: 00h Size: 8 bits
23.1.26 HERES—MEI Extend Register Status
(MEI—D22:F0)
Address Offset: BCh–BFh Attribute: RO
Default Value: 00h Size: 32 bits
Bit Description
7:2 Reserved
1
MEI Interrupt Delivery Mode (HIDM)—R/W. These bits control what type of
interrupt the Intel MEI will send when ARC writes to set the M_IG bit in AUX space.
They are interpreted as follows:
00 = Generate Legacy or MSI interrupt
01 = Generate SCI
10 = Generate SMI
0
Synchronous SMI Occurrence (SSMIO)—R/WC. This bit is used by firmware to
indicate that a synchronous SMI source has been triggered. Host BIOS SMM handler
can use this bit as status indication and clear it once processing is completed. A write of
1 from host SW clears this status bit.
NOTE: It is possible that an async SMI has occurred prior to sync SMI occurrence and
when the BIOS enters the SMM handler, it is possible that both bit 0 and bit 1 of
this register could be set.
Bit Description
31
Extend Register Valid (ERV).
Set by firmware after all firmware has been loaded. If ERA field is SHA-1, the result of
the extend operation is in HER:5-1. If ERA field is SHA-256, the result of the extend
operation is in HER:8-1.
30
Extend Feature Present (EFP).
This bit is hardwired to 1 to allow driver software to easily detect the chipset supports
the Extend Register FW measurement feature.
29:4 Reserved
3:0
Extend Register Algorithm (ERA).
This field indicates the hash algorithm used in the FW measurement extend operations.
Encodings are:
0h = SHA-1
2h = SHA-256
Other values = Reserved.
Intel® Management Engine Interface (MEI) Subsystem Registers (D22:F0)
898 Datasheet
23.1.27 HERX—MEI Extend Register DWX
(MEI—D22:F0)
Address Offset: HER1: C0h–C3h Attribute: RO
HER2: C4h–C7h
HER3: C8h–CBh
HER4: CCh–CFh
HER5: D0h–D3h
HER6: D4h–D7h
HER7: D8h–DBh
HER8: DCh–DFh
Default Value: 00000000h Size: 32 bits
Bit Description
31:0
Extend Register DWX (ERDWX). Nth DWORD result of the extend operation.
NOTE: Extend Operation is HER[5:1] if using SHA-1. If using SHA-2 then Extend
Operation is HER[8:1]
Datasheet 899
Intel® Management Engine Interface (MEI) Subsystem Registers (D22:F0)
23.2 Second Management Engine Interface(MEI1)
Configuration Registers
(MEI—D22:F1)
)
Table 23-1. MEI1 Configuration Registers Address Map
(MEI—D22:F1)
Offset Mnemonic Register Name Default Type
00h–01h VID Vendor Identification 8086h RO
02h–03h DID Device Identification See register
description RO
04h–05h PCICMD PCI Command 0000h R/W, RO
06h–07h PCISTS PCI Status 0010h RO
08h RID Revision Identification See register
description RO
09h–0Bh CC Class Code 0C8000h RO
0Eh HT Header Type 00h RO
10h–17h MEI1_MBAR MEI0 MMIO Base Address 00000000
00000004h R/W, RO
2Ch–2Dh SVID Subsystem Vendor ID 0000h R/WO
2Eh–2Fh SID Subsystem ID 0000h R/WO
34h CAPP Capabilities List Pointer 50h RO
3Ch–3Dh INTR Interrupt Information 0000h R/W, RO
3Eh–3Fh MLMG Maximum Latency/Minimum
Grant 0000h RO
40h–43h HFS Host Firmware Status 00000000h RO
48–4Bh GMES General ME Status 00000000h RO
4Ch–4Fh H_GS Host General Status 00000000h RO
50h–51h PID PCI Power Management
Capability ID 6001h RO
52h–53h PC PCI Power Management
Capabilities C803h RO
54h–55h PMCS PCI Power Management Control
and Status 0008h R/WC, R/W,
RO
8Ch–8Dh MID Message Signaled Interrupt
Identifiers 0005h RO
8Eh–8Fh MC Message Signaled Interrupt
Message Control 0080h R/W, RO
90h–93h MA Message Signaled Interrupt
Message Address 00000000h R/W, RO
94h–97h MUA Message Signaled Interrupt Upper
Address 00000000h R/W
98h–99h MD Message Signaled Interrupt
Message Data 0000h R/W
A0h HIDM MEI Interrupt Delivery Mode 00h R/W
BC–BF HERS MEI Extended Register Status 40000000h RO
C0–DF HER[1:8] MEI Extended Register DW[1:8] 00000000h RO
Intel® Management Engine Interface (MEI) Subsystem Registers (D22:F0)
900 Datasheet
23.2.1 VID—Vendor Identification Register
(MEI—D22:F1)
Address Offset: 00h01h Attribute: RO
Default Value: 8086h Size: 16 bits
23.2.2 DID—Device Identification Register
(MEI—D22:F1)
Address Offset: 02h–03h Attribute: RO
Default Value: See bit description Size: 16 bits
23.2.3 PCICMD—PCI Command Register
(MEI—D22:F1)
Address Offset: 04h–05h Attribute: R/W, RO
Default Value: 0000h Size: 16 bits
Bit Description
15:0 Vendor ID (VID)—RO. This is a 16-bit value assigned to Intel.
Bit Description
15:0
Device ID (DID)—RO. This is a 16-bit value assigned to the Intel Management Engine
Interface controller. See the Intel® 5 Series Chipset and Intel® 3400 Series Chipset
Specification Update for the value of the Device ID Register.
Bit Description
15:11 Reserved
10 Interrupt Disable (ID)—R/W. Disables this device from generating PCI line based
interrupts. This bit does not have any effect on MSI operation.
9:3 Reserved
2
Bus Master Enable (BME)—R/W. Controls the Intel MEI host controller's ability to act
as a system memory master for data transfers. When this bit is cleared, Intel MEI bus
master activity stops and any active DMA engines return to an idle condition. This bit is
made visible to firmware through the H_PCI_CSR register, and changes to this bit may
be configured by the H_PCI_CSR register to generate an ME MSI. When this bit is 0,
Intel MEI is blocked from generating MSI to the host CPU.
NOTE: This bit does not block Intel MEI accesses to ME-UMA; that is, writes or reads to
the host and ME circular buffers through the read window and write window
registers still cause ME backbone transactions to ME-UMA.
1
Memory Space Enable (MSE)—R/W. Controls access to the Intel ME's memory
mapped register space.
0 = Disable. Memory cycles within the range specified by the memory base and limit
registers are master aborted.
1 = Enable. Allows memory cycles within the range specified by the memory base and
limit registers accepted.
0 Reserved
Datasheet 901
Intel® Management Engine Interface (MEI) Subsystem Registers (D22:F0)
23.2.4 PCISTS—PCI Status Register
(MEI—D22:F1)
Address Offset: 06h07h Attribute: RO
Default Value: 0010h Size: 16 bits
23.2.5 RID—Revision Identification Register
(MEI—D22:F1)
Offset Address: 08h Attribute: RO
Default Value: See bit description Size: 8 bits
23.2.6 CC—Class Code Register
(MEI—D22:F1)
Address Offset: 09h0Bh Attribute: RO
Default Value: 078000h Size: 24 bits
Bit Description
15:5 Reserved
4 Capabilities List (CL)—RO. Indicates the presence of a capabilities list, hardwired to 1.
3
Interrupt StatusRO. Indicates the interrupt status of the device.
0 = Interrupt is de-asserted.
1 = Interrupt is asserted.
2:0 Reserved
Bit Description
7:0 Revision ID—RO. See the Intel® 5 Series Chipset and Intel® 3400 Series Chipset
Specification Update for the value of the Revision ID Register
Bit Description
23:16 Base Class Code (BCC)—RO. Indicates the base class code of the Intel MEI device.
15:8 Sub Class Code (SCC)—RO. Indicates the sub class code of the Intel MEI device.
7:0 Programming Interface (PI)—RO. Indicates the programming interface of the Intel
MEI device.
Intel® Management Engine Interface (MEI) Subsystem Registers (D22:F0)
902 Datasheet
23.2.7 HTYPE—Header Type Register
(MEI—D22:F1)
Address Offset: 0Eh Attribute: RO
Default Value: 80h Size: 8 bits
23.2.8 MEI_MBAR—MEI MMIO Base Address Register
(MEI—D22:F1)
Address Offset: 10h17h Attribute: R/W, RO
Default Value: 0000000000000004h Size: 64 bits
This register allocates space for the Intel MEI memory mapped registers.
23.2.9 SVID—Subsystem Vendor ID Register
(MEI—D22:F1)
Address Offset: 2Ch2Dh Attribute: R/WO
Default Value: 0000h Size: 16 bits
Bit Description
7Multi-Function Device (MFD)—RO. Indicates the Intel MEI host controller is part of a
multifunction device.
6:0 Header Layout (HL)—RO. Indicates that the Intel MEI uses a target device layout.
Bit Description
63:4 Base Address (BA)—R/W. Software programs this field with the base address of this
region.
3Prefetchable Memory (PM)—RO. Indicates that this range is not pre-fetchable.
2:1 Type (TP)—RO. Set to 10b to indicate that this range can be mapped anywhere in 64-
bit address space.
0Resource Type Indicator (RTE)—RO. Indicates a request for register memory
space.
Bit Description
15:0
Subsystem Vendor ID (SSVID)R/WO. Indicates the sub-system vendor identifier.
This field should be programmed by BIOS during boot-up. Once written, this register
becomes Read Only. This field can only be cleared by PLTRST#.
Datasheet 903
Intel® Management Engine Interface (MEI) Subsystem Registers (D22:F0)
23.2.10 SID—Subsystem ID Register
(MEI—D22:F1)
Address Offset: 2Eh2Fh Attribute: R/WO
Default Value: 0000h Size: 16 bits
23.2.11 CAPP—Capabilities List Pointer Register
(MEI—D22:F1)
Address Offset: 34h Attribute: RO
Default Value: 50h Size: 8 bits
23.2.12 INTR—Interrupt Information Register
(MEI—D22:F1)
Address Offset: 3Ch–3Dh Attribute: R/W, RO
Default Value: 0100h Size: 16 bits
23.2.13 HFS—Host Firmware Status Register
(MEI—D22:F1)
Address Offset: 40h–43h Attribute: RO
Default Value: 00000000h Size: 32 bits
Bit Description
15:0
Subsystem ID (SSID)—R/WO. Indicates the sub-system identifier. This field should
be programmed by BIOS during boot-up. Once written, this register becomes Read
Only. This field can only be cleared by PLTRST#.
Bit Description
7:0 Capabilities Pointer (PTR)—RO. Indicates that the pointer for the first entry in the
capabilities list is at 50h in configuration space.
Bit Description
15:8 Interrupt Pin (IPIN)—RO. This field indicates the interrupt pin the Intel MEI host
controller uses. The value of 01h selects INTA# interrupt pin.
7:0 Interrupt Line (ILINE)—R/W. Software written value to indicate which interrupt line
(vector) the interrupt is connected to. No hardware action is taken on this register.
Bit Description
31:0 Host Firmware Status (HFS)—RO. This register field is used by Firmware to reflect
the operating environment to the host.
Intel® Management Engine Interface (MEI) Subsystem Registers (D22:F0)
904 Datasheet
23.2.14 GMES—General ME Status Register
(MEI—D22:F1)
Address Offset: 48h–4Bh Attribute: RO
Default Value: 00000000h Size: 32 bits
23.2.15 H_GS—Host General Status Register
(MEI—D22:F1)
Address Offset: 4Ch–4Fh Attribute: RO
Default Value: 00000000h Size: 32 bits
23.2.16 PID—PCI Power Management Capability ID Register
(MEI—D22:F1)
Address Offset: 50h–51h Attribute: RO
Default Value: 6001h Size: 16 bits
Bit Description
31:0 General ME Status(ME_GS)—RO. This field is populated by ME.
Bit Description
31:0 Host General Status(H_GS)—RO. General Status of Host, this field is not used by
Hardware
Bit Description
15:8 Next Capability (NEXT)—RO. Value of 60h indicates the location of the next pointer.
7:0 Capability ID (CID)—RO. Indicates the linked list item is a PCI Power Management
Register.
Datasheet 905
Intel® Management Engine Interface (MEI) Subsystem Registers (D22:F0)
23.2.17 PC—PCI Power Management Capabilities Register
(MEI—D22:F1)
Address Offset: 52h53h Attribute: RO
Default Value: C803h Size: 16 bits
Bit Description
15:11
PME_Support (PSUP)—RO. This five-bit field indicates the power states in which the
function may assert PME#. Intel MEI can assert PME# from any D-state except D1 or
D2 which are not supported by Intel MEI.
10:9 Reserved
8:6 Aux_Current (AC)—RO. Reports the maximum Suspend well current required when in
the D3cold state. Value of 00b is reported.
5Device Specific Initialization (DSI)—RO. Indicates whether device-specific
initialization is required.
4 Reserved
3PME Clock (PMEC)—RO. Indicates that PCI clock is not required to generate PME#.
2:0 Version (VS)—RO. Hardwired to 011b to indicate support for Revision 1.2 of the PCI
Power Management Specification.
Intel® Management Engine Interface (MEI) Subsystem Registers (D22:F0)
906 Datasheet
23.2.18 PMCS—PCI Power Management Control and Status
Register (MEI—D22:F1)
Address Offset: 54h55h Attribute: R/WC, R/W, RO
Default Value: 0008h Size: 16 bits
23.2.19 MID—Message Signaled Interrupt Identifiers Register
(MEI—D22:F1)
Address Offset: 8Ch–8Dh Attribute: RO
Default Value: 0005h Size: 16 bits
Bit Description
15
PME Status (PMES)—R/WC. Bit is set by ME Firmware. Host software clears bit by
writing 1 to bit.
This bit is reset when CL_RST1# asserted.
14:9 Reserved
8
PME Enable (PMEE)—R/W. This bit is read/write and is under the control of host SW.
It does not directly have an effect on PME events. However, this bit is shadowed so ME
FW can monitor it. ME FW will not cause the PMES bit to transition to 1 while the PMEE
bit is 0, indicating that host SW had disabled PME.
This bit is reset when PLTRST# asserted.
7:4 Reserved
3
No_Soft_Reset (NSR)—RO. This bit indicates that when the Intel MEI host controller
is transitioning from D3hot to D0 due to a power state command, it does not perform an
internal reset. Configuration context is preserved.
2Reserved
1:0
Power State (PS)R/W. This field is used both to determine the current power state
of the Intel MEI host controller and to set a new power state. The values are:
00 = D0 state (default)
11 = D3hot state
The D1 and D2 states are not supported for the Intel MEI host controller. When in the
D3hot state, the Intel ME’s configuration space is available, but the register memory
spaces are not. Additionally, interrupts are blocked.
Bit Description
15:8 Next Pointer (NEXT)—RO. Value of 00h indicates that this is the last item in the list.
7:0 Capability ID (CID)—RO. Capabilities ID indicates MSI.
Datasheet 907
Intel® Management Engine Interface (MEI) Subsystem Registers (D22:F0)
23.2.20 MC—Message Signaled Interrupt Message Control Register
(MEI—D22:F1)
Address Offset: 8Eh–8Fh Attribute: R/W, RO
Default Value: 0080h Size: 16 bits
23.2.21 MA—Message Signaled Interrupt Message Address
Register (MEI—D22:F1)
Address Offset: 90h–93h Attribute: R/W, RO
Default Value: 00000000h Size: 32 bits
23.2.22 MUA—Message Signaled Interrupt Upper Address Register
(MEI—D22:F1)
Address Offset: 94h–97h Attribute: R/W
Default Value: 00000000h Size: 32 bits
23.2.23 MD—Message Signaled Interrupt Message Data Register
(MEI—D22:F1)
Address Offset: 98h–99h Attribute: R/W
Default Value: 0000h Size: 16 bits
Bit Description
15:8 Reserved
764 Bit Address Capable (C64)—RO. Specifies that function is capable of generating
64-bit messages.
6:1 Reserved
0MSI Enable (MSIE)—R/W. If set, MSI is enabled and traditional interrupt pins are not
used to generate interrupts.
Bit Description
31:2 Address (ADDR)—R/W. Lower 32 bits of the system specified message address,
always DW aligned.
1:0 Reserved
Bit Description
31:0 Upper Address (UADDR)—R/W. Upper 32 bits of the system specified message
address, always DW aligned.
Bit Description
15:0
Data (DATA)—R/W. This 16-bit field is programmed by system software if MSI is
enabled. Its content is driven during the data phase of the MSI memory write
transaction.
Intel® Management Engine Interface (MEI) Subsystem Registers (D22:F0)
908 Datasheet
23.2.24 HIDM—MEI Interrupt Delivery Mode Register
(MEI—D22:F1)
Address Offset: A0h Attribute: R/W
Default Value: 00h Size: 8 bits
23.2.25 HERES—MEI Extend Register Status
(MEI—D22:F1)
Address Offset: BCh–BFh Attribute: RO
Default Value: 00h Size: 32 bits
Bit Description
7:2 Reserved
1
Intel MEI Interrupt Delivery Mode (HIDM)—R/W. These bits control what type of
interrupt the Intel MEI will send when ARC writes to set the M_IG bit in AUX space.
They are interpreted as follows:
00 = Generate Legacy or MSI interrupt
01 = Generate SCI
10 = Generate SMI
0
Synchronous SMI Occurrence (SSMIO)—R/WC. This bit is used by firmware to
indicate that a synchronous SMI source has been triggered. Host BIOS SMM handler
can use this bit as status indication and clear it once processing is completed. A write of
1 from host SW clears this status bit.
NOTE: It is possible that an async SMI has occurred prior to sync SMI occurrence and
when the BIOS enters the SMM handler, it is possible that both bit 0 and bit 1 of
this register could be set.
Bit Description
31
Extend Register Valid (ERV). Set by firmware after all firmware has been loaded. If
ERA field is SHA-1, the result of the extend operation is in HER:5-1. If ERA field is SHA-
256, the result of the extend operation is in HER:8-1.
30 Extend Feature Present (EFP). This bit is hardwired to 1 to allow driver software to
easily detect the chipset supports the Extend Register FW measurement feature.
29:4 Reserved
3:0
Extend Register Algorithm (ERA). This field indicates the hash algorithm used in the
FW measurement extend operations. Encodings are:
0h = SHA-1
2h = SHA-256
Other values = Reserved.
Datasheet 909
Intel® Management Engine Interface (MEI) Subsystem Registers (D22:F0)
23.2.26 HERX—MEI Extend Register DWX
(MEI—D22:F1)
Address Offset: HER1: C0h–C3h Attribute: RO
HER2: C4h–C7h
HER3: C8h–CBh
HER4: CCh–CFh
HER5: D0h–D3h
HER6: D4h–D7h
HER7: D8h–DBh
HER8: DCh–DFh
Default Value: 00000000h Size: 32 bits
23.3 MEI0_MBAR—MEI0 MMIO Registers
These MMIO registers are accessible starting at the MEI MMIO Base Address
(MEI_MBAR) which gets programmed into D22:F0:Offset 10–17h. These registers are
reset by PLTRST# unless otherwise noted.
Bit Description
31:0
Extend Register DWX (ERDWX):
Xth DWORD result of the extend operation.
NOTE: Extend Operation is HER[5:1] if using SHA-1. If using SHA-2, then Extend
Operation is HER[8:1]
Table 23-2. MEI MMIO Register Address Map (VE—D23:F0)
MEI_MBAR+Of
fset Mnemonic Register Name Default Type
00–03h H_CB_WW Host Circular Buffer Write
Window 00000000h RO
04h–07h H_CSR Host Control Status 02000000h R/W, R/WC, RO
08h–0Bh ME_CB_RW ME Circular Buffer Read
Window 00000000h RO
0Ch–0Fh ME CSR_HA ME Control Status Host
Access 02000000h RO
Intel® Management Engine Interface (MEI) Subsystem Registers (D22:F0)
910 Datasheet
23.3.1 H_CB_WW—Host Circular Buffer Write Window Register
(MEI MMIO Register)
Address Offset: MEI0_MBAR + 00h Attribute: RO
Default Value: 00000000h Size: 32 bits
23.3.2 H_CSR—Host Control Status Register
(MEI MMIO Register)
Address Offset: MEI0_MBAR + 04h Attribute: RO
Default Value: 02000000h Size: 32 bits
Bit Description
31:0
Host Circular Buffer Write Window Field (H_CB_WWF). This bit field is for host to
write into its circular buffer. The host's circular buffer is located at the ME subsystem
address specified in the Host CB Base Address register. This field is write only, reads will
return arbitrary data. Writes to this register will increment the H_CBWP as long as
ME_RDY is 1. When ME_RDY is 0, writes to this register have no effect and are not
delivered to the H_CB, nor is H_CBWP incriminated.
Bit Description
31:24
Host Circular Buffer Depth (H_CBD)—RO. This field indicates the maximum number
of 32 bit entries available in the host circular buffer (H_CB). Host software uses this field
along with the H_CBRP and H_CBWP fields to calculate the number of valid entries in the
H_CB to read or # of entries available for write.
This field is implemented with a "1-hot" scheme. Only one bit will be set to a "1" at a
time. Each bit position represents the value n of a buffer depth of (2^n). For example,
when bit# 1 is 1, the buffer depth is 2; when bit#2 is 1, the buffer depth is 4, etc. The
allowed buffer depth values are 2, 4, 8, 16, 32, 64 and 128.
23:16 Host CB Write Pointer (H_CBWP). Points to next location in the H_CB for host to
write the data. Software uses this field along with H_CBRP and H_CBD fields to calculate
the number of valid entries in the H_CB to read or number of entries available for write.
15:8 Host CB Read Pointer (H_CBRP). Points to next location in the H_CB where a valid
data is available for embedded controller to read. Software uses this field along with
H_CBWR and H_CBD fields to calculate the number of valid entries in the host CB to read
or number of entries available for write.
7:5 Reserved Must be programmed to zero
4Host Reset (H_RST). Setting this bit to 1 will initiate a Intel MEI reset sequence to get
the circular buffers into a known good state for host and ME communication. When this
bit transitions from 0 to 1, hardware will clear the H_RDY and ME_RDY bits.
3Host Ready (H_RDY). This bit indicates that the host is ready to process messages.
2Host Interrupt Generate (H_IG). Once message(s) are written into its CB, the host
sets this bit to one for the HW to set the ME_IS bit in the ME_CSR and to generate an
interrupt message to ME. HW will send the interrupt message to ME only if the ME_IE is
enabled. HW then clears this bit to 0.
1Host Interrupt Status (H_IS). Hardware sets this bit to 1 when ME_IG bit is set to 1.
Host clears this bit to 0 by writing a 1 to this bit position. H_IE has no effect on this bit.
0Host Interrupt Enable (H_IE). Host sets this bit to 1 to enable the host interrupt
(INTR# or MSI) to be asserted when H_IS is set to 1.
Datasheet 911
Intel® Management Engine Interface (MEI) Subsystem Registers (D22:F0)
23.3.3 ME_CB_RW—ME Circular Buffer Read Window Register
(MEI MMIO Register)
Address Offset: MEI0_MBAR + 08h Attribute: RO
Default Value: FFFFFFFFh Size: 32 bits
23.3.4 ME CSR_HA—ME Control Status Host Access Register
(MEI MMIO Register)
Address Offset: MEI0_MBAR + 0Ch Attribute: RO
Default Value: 02000000h Size: 32 bits
Bit Description
31:0
ME Circular Buffer Read Window Field (ME_CB_RWF). This bit field is for host to
read from the ME Circular Buffer. The ME's circular buffer is located at the ME
subsystem address specified in the ME CB Base Address register. This field is read only,
writes have no effect. Reads to this register will increment the ME_CBRP as long as
ME_RDY is 1. When ME_RDY is 0, reads to this register have no effect, all 1s are
returned, and ME_CBRP is not incremented.
Bit Description
31:24 ME Circular Buffer Depth Host Read Access (ME_CBD_HRA).
Host read only access to ME_CBD.
23:16 ME CB Write Pointer Host Read Access (ME_CBWP_HRA).
Host read only access to ME_CBWP.
15:8 ME CB Read Pointer Host Read Access (ME_CBRP_HRA).
Host read only access to ME_CBRP.
7:5 Reserved
4ME Reset Host Read Access (ME_RST_HRA).
Host read access to ME_RST.
3ME Ready Host Read Access (ME_RDY_HRA):
Host read access to ME_RDY.
2ME Interrupt Generate Host Read Access (ME_IG_HRA).
Host read only access to ME_IG.
1ME Interrupt Status Host Read Access (ME_IS_HRA).
Host read only access to ME_IS.
0ME Interrupt Enable Host Read Access (ME_IE_HRA).
Host read only access to ME_IE.
Intel® Management Engine Interface (MEI) Subsystem Registers (D22:F0)
912 Datasheet
23.4 MEI1_MBAR—MEI0 MMIO Registers
These MMIO registers are accessible starting at the MEI1 MMIO Base Address
(MEI1_MBAR) which gets programmed into D22:F1:Offset 10–17h. These registers are
reset by PLTRST# unless otherwise noted.
23.4.1 H_CB_WW—Host Circular Buffer Write Window Register
(MEI MMIO Register)
Address Offset: MEI1_MBAR + 00h Attribute: RO
Default Value: 00000000h Size: 32 bits
Table 23-3. MEI MMIO Register Address Map (VE—D23:F0)
MEI_MBAR
+ Offset Mnemonic Register Name Default Type
00–03h H_CB_WW Host Circular Buffer Write Window 00000000h RO
04h–07h H_CSR Host Control Status 02000000h R/W, R/WC,
RO
08h–0Bh ME_CB_RW ME Circular Buffer Read Window 00000000h RO
0Ch–0Fh ME CSR_HA ME Control Status Host Access 02000000h RO
Bit Description
31:0
Host Circular Buffer Write Window Field (H_CB_WWF). This bit field is for host to
write into its circular buffer. The host's circular buffer is located at the ME subsystem
address specified in the Host CB Base Address register. This field is write only, reads will
return arbitrary data. Writes to this register will increment the H_CBWP as long as
ME_RDY is 1. When ME_RDY is 0, writes to this register have no effect and are not
delivered to the H_CB, nor is H_CBWP incremented.
Datasheet 913
Intel® Management Engine Interface (MEI) Subsystem Registers (D22:F0)
23.4.2 H_CSR—Host Control Status Register
(MEI MMIO Register)
Address Offset: MEI1_MBAR + 04h Attribute: RO
Default Value: 02000000h Size: 32 bits
Bit Description
31:24
Host Circular Buffer Depth (H_CBD)—RO. This field indicates the maximum number
of 32 bit entries available in the host circular buffer (H_CB). Host software uses this
field along with the H_CBRP and H_CBWP fields to calculate the number of valid entries
in the H_CB to read or # of entries available for write.
NOTE: This field is implemented with a "1-hot" scheme. Only one bit will be set to a 1
at a time. Each bit position represents the value n of a buffer depth of (2^n).
For example, when bit# 1 is 1, the buffer depth is 2; when bit#2 is 1, the buffer
depth is 4, etc. The allowed buffer depth values are 2, 4, 8, 16, 32, 64 and 128.
23:16
Host CB Write Pointer (H_CBWP). Points to next location in the H_CB for host to
write the data. Software uses this field along with H_CBRP and H_CBD fields to
calculate the number of valid entries in the H_CB to read or number of entries available
for write.
15:8
Host CB Read Pointer (H_CBRP). Points to next location in the H_CB where a valid
data is available for embedded controller to read. Software uses this field along with
H_CBWR and H_CBD fields to calculate the number of valid entries in the host CB to
read or number of entries available for write.
7:5 Reserved Must be programmed to zero
4
Host Reset (H_RST). Setting this bit to 1 will initiate a Intel MEI reset sequence to
get the circular buffers into a known good state for host and ME communication. When
this bit transitions from 0 to 1, hardware will clear the H_RDY and ME_RDY bits.
3Host Ready (H_RDY). This bit indicates that the host is ready to process messages.
2
Host Interrupt Generate (H_IG). Once message(s) are written into its CB, the host
sets this bit to one for the HW to set the ME_IS bit in the ME_CSR and to generate an
interrupt message to ME. HW will send the interrupt message to ME only if the ME_IE is
enabled. HW then clears this bit to 0.
1Host Interrupt Status (H_IS). Hardware sets this bit to 1 when ME_IG bit is set to 1.
Host clears this bit to 0 by writing a 1 to this bit position. H_IE has no effect on this bit.
0Host Interrupt Enable (H_IE). Host sets this bit to 1 to enable the host interrupt
(INTR# or MSI) to be asserted when H_IS is set to 1.
Intel® Management Engine Interface (MEI) Subsystem Registers (D22:F0)
914 Datasheet
23.4.3 ME_CB_RW—ME Circular Buffer Read Window Register
(MEI MMIO Register)
Address Offset: MEI1_MBAR + 08h Attribute: RO
Default Value: FFFFFFFFh Size: 32 bits
23.4.4 ME CSR_HA—ME Control Status Host Access Register
(MEI MMIO Register)
Address Offset: MEI1_MBAR + 0Ch Attribute: RO
Default Value: 02000000h Size: 32 bits
Bit Description
31:0
ME Circular Buffer Read Window Field (ME_CB_RWF). This bit field is for host to
read from the ME Circular Buffer. The ME's circular buffer is located at the ME
subsystem address specified in the ME CB Base Address register. This field is read only,
writes have no effect. Reads to this register will increment the ME_CBRP as long as
ME_RDY is 1. When ME_RDY is 0, reads to this register have no effect, all 1s are
returned, and ME_CBRP is not incremented.
Bit Description
31:24 ME Circular Buffer Depth Host Read Access (ME_CBD_HRA).
Host read only access to ME_CBD.
23:16 ME CB Write Pointer Host Read Access (ME_CBWP_HRA).
Host read only access to ME_CBWP.
15:8 ME CB Read Pointer Host Read Access (ME_CBRP_HRA).
Host read only access to ME_CBRP.
7:5 Reserved
4ME Reset Host Read Access (ME_RST_HRA).
Host read access to ME_RST.
3ME Ready Host Read Access (ME_RDY_HRA).
Host read access to ME_RDY.
2ME Interrupt Generate Host Read Access (ME_IG_HRA).
Host read only access to ME_IG.
1ME Interrupt Status Host Read Access (ME_IS_HRA).
Host read only access to ME_IS.
0ME Interrupt Enable Host Read Access (ME_IE_HRA).
Host read only access to ME_IE.
Datasheet 915
Intel® Management Engine Interface (MEI) Subsystem Registers (D22:F0)
23.5 IDE Function for Remote Boot and Installations
PT IDER Registers (IDER—D22:F2)
Table 23-4. IDE Function for remote boot and Installations PT IDER Register Address Map
Address
Offset
Register
Symbol Register Name Default
Value Attribute
00h–01h VID Vendor Identification 8086h RO
02h–03h DID Device Identification
See
register
description
RO
04h–05h PCICMD PCI Command 0000h RO, R/W
06h–07h PCISTS PCI Status 00B0h RO
08h RID Revision ID
See
register
description
RO
09–0Bh CC Class Codes 010185h RO
0Ch CLS Cache Line Size 00h RO
0Dh PLT Primary Latency Timer 00h RO
10–13h PCMDBA Primary Command Block IO Bar 00000001h RO, R/W
14–17h PCTLBA Primary Control Block Base Address 00000001h RO, R/W
18–1Bh SCMDBA Secondary Command Block Base Address 00000001h RO, R/W
1C–1Fh SCTLBA Secondary Control Block base Address 00000001h RO, R/W
20–23h LBAR Legacy Bus Master Base Address 00000001h RO, R/W
2C–2Fh SS Sub System Identifiers 00008086h R/WO
30–33h EROM Expansion ROM Base Address 00000000h RO
34h CAP Capabilities Pointer C8h RO
3C–3Dh INTR Interrupt Information 0300h R/W, RO
C8–C9h PID PCI Power Management Capability ID D001h RO
CA–CBh PC PCI Power Management Capabilities 0023h RO
CC–CFh PMCS PCI Power Management Control and Status 00000000h RO, R/W,
RO/V
D0–D1h MID Message Signaled Interrupt Capability ID 0005h RO
D2–D3h MC Message Signaled Interrupt Message
Control 0080h RO, R/W
D4–D7h MA Message Signaled Interrupt Message
Address 00000000h R/W, RO
D8–DBh MAU Message Signaled Interrupt Message Upper
Address 00000000h RO, R/W
DC–DDh MD Message Signaled Interrupt Message Data 0000h R/W
Intel® Management Engine Interface (MEI) Subsystem Registers (D22:F0)
916 Datasheet
23.5.1 VID—Vendor Identification Register (IDER—D22:F2)
Address Offset: 00–01h Attribute: RO
Default Value: 8086h Size: 16 bits
23.5.2 DID—Device Identification Register (IDER—D22:F2)
Address Offset: 02–03h Attribute: RO
Default Value: See bit description Size: 16 bits
23.5.3 PCICMD—PCI Command Register (IDER—D22:F2)
Address Offset: 04–05h Attribute: RO, R/W
Default Value: 0000h Size: 16 bits
Bit Description
15:0 Vendor ID (VID)—RO. This is a 16-bit value assigned by Intel.
Bit Description
15:0
Device ID (DID)—RO. This is a 16-bit value assigned to the PCH IDER controller.
See the Intel® 5 Series Chipset and Intel® 3400 Series Chipset Specification Update
for the value of the Device ID Register.
Bit Description
15:11 Reserved
10
Interrupt Disable (ID)—R/W. This disables pin-based INTx# interrupts. This bit
has no effect on MSI operation. When set, internal INTx# messages will not be
generated. When cleared, internal INTx# messages are generated if there is an
interrupt and MSI is not enabled.
9:3 Reserved
2
Bus Master Enable (BME)—RO. This bit controls the PT function's ability to act as a
master for data transfers. This bit does not impact the generation of completions for
split transaction commands.
1Memory Space Enable (MSE)—RO. PT function does not contain target memory
space.
0I/O Space enable (IOSE)—RO. This bit controls access to the PT function's target
I/O space.
Datasheet 917
Intel® Management Engine Interface (MEI) Subsystem Registers (D22:F0)
23.5.4 PCISTS—PCI Device Status Register (IDER—D22:F2)
Address Offset: 06–07h Attribute: RO
Default Value: 00B0h Size: 16 bits
23.5.5 RID—Revision Identification Register (IDER—D22:F2)
Address Offset: 08h Attribute: RO
Default Value: See bit description Size: 8 bits
23.5.6 CC—Class Codes Register (IDER—D22:F2)
Address Offset: 09–0Bh Attribute: RO
Default Value: 010185h Size: 24 bits
Bit Description
15:11 Reserved
10:9 DEVSEL# Timing Status (DEVT)—RO. This bit controls the device select time for
the PT function's PCI interface.
8:5 Reserved
4Capabilities List (CL)—RO. This bit indicates that there is a capabilities pointer
implemented in the device.
3
Interrupt Status (IS)—RO. This bit reflects the state of the interrupt in the
function. Setting of the Interrupt Disable bit to 1 has no affect on this bit. Only when
this bit is a 1 and ID bit is 0 is the INTc interrupt asserted to the Host.
2:0 Reserved
Bit Description
7:0 Revision ID—RO. See the Intel® 5 Series Chipset and Intel® 3400 Series Chipset
Specification Update for the value of the Device ID Register.
Bit Description
23:16 Base Class Code (BCC)—RO This field indicates the base class code of the IDER
host controller device.
15:8 Sub Class Code (SCC)—RO This field indicates the sub class code of the IDER host
controller device.
7:0 Programming Interface (PI)—RO This field indicates the programming interface of
the IDER host controller device.
Intel® Management Engine Interface (MEI) Subsystem Registers (D22:F0)
918 Datasheet
23.5.7 CLS—Cache Line Size Register (IDER—D22:F2)
Address Offset: 0Ch Attribute: RO
Default Value: 00h Size: 8 bits
23.5.8 PCMDBA—Primary Command Block IO Bar Register
(IDER—D22:F2)
Address Offset: 10–13h Attribute: RO, R/W
Default Value: 00000001h Size: 32 bits
23.5.9 PCTLBA—Primary Control Block Base Address Register
(IDER—D22:F2)
Address Offset: 14–17h Attribute: RO, R/W
Default Value: 00000001h Size: 32 bits
Bit Description
7:0 Cache Line Size (CLS)—RO. All writes to system memory are Memory Writes.
Bit Description
31:16 Reserved
15:3 Base Address (BAR)—R/W Base Address of the BAR0 I/O space (8 consecutive I/O
locations).
2:1 Reserved
0Resource Type Indicator (RTE)—RO. This bit indicates a request for I/O space.
Bit Description
31:16 Reserved
15:2 Base Address (BAR)—R/W. Base Address of the BAR1 I/O space (4 consecutive I/O
locations)
1 Reserved
0Resource Type Indicator (RTE)—RO. This bit indicates a request for I/O space
Datasheet 919
Intel® Management Engine Interface (MEI) Subsystem Registers (D22:F0)
23.5.10 SCMDBA—Secondary Command Block Base Address
Register (IDER—D22:F2)
Address Offset: 18–1Bh Attribute: RO, R/W
Default Value: 00000001h Size: 32 bits
23.5.11 SCTLBA—Secondary Control Block base Address
Register (IDER—D22:F2)
Address Offset: 1C–1Fh Attribute: RO, R/W
Default Value: 00000001h1 Size: 32 bits
23.5.12 LBAR—Legacy Bus Master Base Address Register
(IDER—D22:F2)
Address Offset: 20–23h Attribute: RO, R/W
Default Value: 00000001h Size: 32 bits
Bit Description
31:16 Reserved
15:3 Base Address (BAR)—R/W. Base Address of the I/O space (8 consecutive I/O
locations).
2:1 Reserved
0Resource Type Indicator (RTE)—RO. This bit indicates a request for I/O space.
Bit Description
31:16 Reserved
15:2 Base Address (BAR)—R/W. Base Address of the I/O space (4 consecutive I/O
locations).
1Reserved
0Resource Type Indicator (RTE)—RO. This bit indicates a request for I/O space.
Bit Description
31:16 Reserved
15:4 Base Address (BA)—R/W. Base Address of the I/O space (16 consecutive I/O
locations).
3:1 Reserved
0Resource Type Indicator (RTE)—RO. This bit indicates a request for I/O space.
Intel® Management Engine Interface (MEI) Subsystem Registers (D22:F0)
920 Datasheet
23.5.13 SVID—Subsystem Vendor ID Register (IDER—D22:F2)
Address Offset: 2Ch2Dh Attribute: R/WO
Default Value: 0000h Size: 16 bits
23.5.14 SID—Subsystem ID Register (IDER—D22:F2)
Address Offset: 2Eh2Fh Attribute: R/WO
Default Value: 8086h Size: 16 bits
23.5.15 CAPP—Capabilities List Pointer Register
(IDER—D22:F2)
Address Offset: 34h Attribute: RO
Default Value: C8h Size: 8 bits
23.5.16 INTR—Interrupt Information Register
(IDER—D22:F2)
Address Offset: 3C–3Dh Attribute: R/W, RO
Default Value: 0300h Size: 16 bits
Bit Description
15:0
Subsystem Vendor ID (SSVID)R/WO. Indicates the sub-system vendor identifier.
This field should be programmed by BIOS during boot-up. Once written, this register
becomes Read Only. This field can only be cleared by PLTRST#.
Bit Description
15:0
Subsystem ID (SSID)—R/WO. Indicates the sub-system identifier. This field should
be programmed by BIOS during boot-up. Once written, this register becomes Read
Only. This field can only be cleared by PLTRST#.
Bit Description
7:0 Capability Pointer (CP)—R/WO. This field indicates that the first capability pointer
is offset C8h (the power management capability).
Bit Description
15:8
Interrupt Pin (IPIN)—RO. A value of 1h/2h/3h/4h indicates that this function
implements legacy interrupt on INTA/INTB/INTC/INTD, respectively
Function Value INTx
(2 IDE) 03h INTC
7:0
Interrupt Line (ILINE)—R/W. The value written in this register indicates which
input of the system interrupt controller, the device's interrupt pin is connected to.
This value is used by the OS and the device driver, and has no affect on the
hardware.
Datasheet 921
Intel® Management Engine Interface (MEI) Subsystem Registers (D22:F0)
23.5.17 PID—PCI Power Management Capability ID Register
(IDER—D22:F2)
Address Offset: C8–C9h Attribute: RO
Default Value: D001h Size: 16 bits
23.5.18 PC—PCI Power Management Capabilities Register
(IDER—D22:F2)
Address Offset: CA–CBh Attribute: RO
Default Value: 0023h Size: 16 bits
Bit Description
15:8 Next Capability (NEXT)—RO. Its value of D0h points to the MSI capability.
7:0 Cap ID (CID)—RO. This field indicates that this pointer is a PCI power management.
Bit Description
15:11
PME_Support (PSUP)—RO. This five-bit field indicates the power states in which
the function may assert PME#. IDER can assert PME# from any D-state except D1 or
D2 which are not supported by IDER.
10:9 Reserved
8:6 Aux_Current (AC)—RO. Reports the maximum Suspend well current required when
in the D3cold state. Value of 00b is reported.
5Device Specific Initialization (DSI)—RO. Indicates whether device-specific
initialization is required.
4Reserved
3PME Clock (PMEC)—RO. Indicates that PCI clock is not required to generate PME#.
2:0 Version (VS)—RO. Hardwired to 011b to indicate support for Revision 1.2 of the PCI
Power Management Specification.
Intel® Management Engine Interface (MEI) Subsystem Registers (D22:F0)
922 Datasheet
23.5.19 PMCS—PCI Power Management Control and Status
Register (IDER—D22:F2)
Address Offset: CC–CFh Attribute: RO, R/W
Default Value: 00000000h Size: 32 bits
23.5.20 MID—Message Signaled Interrupt Capability ID
Register (IDER—D22:F2)
Address Offset: D0–D1h Attribute: RO
Default Value: 0005h Size: 16 bits
Bit Description
31:4 Reserved
3
No Soft Reset (NSR)—RO. When set to 1, this bit indicates that devices
transitioning from D3hot to D0 because of PowerState commands do not perform an
internal reset. Configuration Context is preserved. Upon transition from the D3hot to
the D0 Initialized state, no additional operating system intervention is required to
preserve Configuration Context beyond writing the PowerState bits.
When cleared to 0, devices do perform an internal reset upon transitioning from
D3hot to D0 via software control of the PowerState bits. Configuration Context is lost
when performing the soft reset. Upon transition from the D3hot to the D0 state, full
re-initialization sequence is needed to return the device to D0 Initialized.
Value in this bit is reflects chicken bit in ME-AUX register x13900, bit [7] which is as
follows:
0 = Device performs internal reset
1 = Device does not perform internal reset
2 Reserved
1:0
Power State (PS)—R/W. This field is used both to determine the current power
state of the PT function and to set a new power state. The values are:
00 = D0 state
11 = D3HOT state
When in the D3HOT state, the controller's configuration space is available, but the I/O
and memory spaces are not. Additionally, interrupts are blocked. If software attempts
to write a '10' or '01' to these bits, the write will be ignored.
Bit Description
15:8 Next Pointer (NEXT)—RO. This value indicates this is the last item in the
capabilities list.
7:0 Capability ID (CID)—RO. The Capabilities ID value indicates device is capable of
generating an MSI.
Datasheet 923
Intel® Management Engine Interface (MEI) Subsystem Registers (D22:F0)
23.5.21 MC—Message Signaled Interrupt Message Control
Register (IDER—D22:F2)
Address Offset: D2–D3h Attribute: RO, R/W
Default Value: 0080h Size: 16 bits
23.5.22 MA—Message Signaled Interrupt Message Address
Register (IDER—D22:F2)
Address Offset: D4–D7h Attribute: R/W, RO
Default Value: 00000000h Size: 32 bits
23.5.23 MAU—Message Signaled Interrupt Message Upper
Address Register (IDER—D22:F2)
Address Offset: D8–DBh Attribute: RO, R/W
Default Value: 00000000h Size: 32 bits
Bit Description
15:8 Reserved
764 Bit Address Capable (C64)—RO. Capable of generating 64-bit and 32-bit
messages.
6:4 Multiple Message Enable (MME)—R/W. These bits are R/W for software
compatibility, but only one message is ever sent by the PT function.
3:1 Multiple Message Capable (MMC)—RO. Only one message is required.
0MSI Enable (MSIE)—R/W. If set, MSI is enabled and traditional interrupt pins are
not used to generate interrupts.
Bit Description
31:2 Address (ADDR)—R/W. This field contains the Lower 32 bits of the system specified
message address, always DWord aligned
1:0 Reserved
Bit Description
31:4 Reserved
3:0 Address (ADDR)—R/W. This field contains the Upper 4 bits of the system specified
message address.
Intel® Management Engine Interface (MEI) Subsystem Registers (D22:F0)
924 Datasheet
23.5.24 MD—Message Signaled Interrupt Message Data
Register (IDER—D22:F2)
Address Offset: DC–DDh Attribute: R/W
Default Value: 0000h Size: 16 bits
23.6 IDE BAR0
Bit Description
15:0 Data (DATA)—R/W. This content is driven onto the lower word of the data bus of the
MSI memory write transaction.
Table 23-5. IDE BAR0 Register Address Map
Address
Offset
Register
Symbol Register Name Default
Value Attribute
0h IDEDATA IDE Data Register 00h R/W
1h IDEERD1 IDE Error Register DEV1 00h R/W
1h IDEERD0 IDE Error Register DEV0 00h R/W
1h IDEFR IDE Features Register 00h R/W
2h IDESCIR IDE Sector Count In Register 00h R/W
2h IDESCOR1 IDE Sector Count Out Register Device 1 00h R/W
2h IDESCOR0 IDE Sector Count Out Register Device 0 00h R/W
3h IDESNOR0 IDE Sector Number Out Register Device 0 00h R/W
3h IDESNOR1 IDE Sector Number Out Register Device 1 00h R/W
3h IDESNIR IDE Sector Number In Register 00h R/W
4h IDECLIR IDE Cylinder Low In Register 00h R/W
4h IDCLOR1 IDE Cylinder Low Out Register Device 1 00h R/W
4h IDCLOR0 IDE Cylinder Low Out Register Device 0 00h R/W
5h IDCHOR0 IDE Cylinder High Out Register Device 0 00h R/W
5h IDCHOR1 IDE Cylinder High Out Register Device 1 00h R/W
5h IDECHIR IDE Cylinder High In Register 00h R/W
6h IDEDHIR IDE Drive/Head In Register 00h R/W
6h IDDHOR1 IDE Drive Head Out Register Device 1 00h R/W
6h IDDHOR0 IDE Drive Head Out Register Device 0 00h R/W
7h IDESD0R IDE Status Device 0 Register 80h R/W
7h IDESD1R IDE Status Device 1 Register 80h R/W
7h IDECR IDE Command Register 00h R/W
Datasheet 925
Intel® Management Engine Interface (MEI) Subsystem Registers (D22:F0)
23.6.1 IDEDATA—IDE Data Register (IDER—D22:F2)
Address Offset: 0h Attribute: R/W
Default Value: 00h Size: 8 bits
The IDE data interface is a special interface that is implemented in the HW. This data
interface is mapped to IO space from the host and takes read and write cycles from the
host targeting master or slave device.
Writes from host to this register result in the data being written to ME memory.
Reads from host to this register result in the data being fetched from ME memory.
Data is typically written/ read in WORDs. ME-FW must enable hardware to allow it to
accept Host initiated Read/ Write cycles, else the cycles are dropped.
23.6.2 IDEERD1—IDE Error Register DEV1
(IDER—D22:F2)
Address Offset: 01h Attribute: R/W
Default Value: 00h Size: 8 bits
This register implements the Error register of the command block of the IDE function.
This register is read only by the HOST interface when DEV = 1 (slave device).
23.6.3 IDEERD0—IDE Error Register DEV0
(IDER—D22:F2)
Address Offset: 01h Attribute: R/W
Default Value: 00h Size: 8 bits
This register implements the Error register of the command block of the IDE function.
This register is read only by the HOST interface when DEV = 0 (master device).
Bit Description
7:0
IDE Data Register (IDEDR)—R/W. Data Register implements the data interface for
IDE. All writes and reads to this register translate into one or more corresponding
write/reads to ME memory
Bit Description
7:0 IDE Error Data (IDEED)—R/W. Drive reflects its error/ diagnostic code to the host
via this register at different times.
Bit Description
7:0 IDE Error Data (IDEED)—R/W. Drive reflects its error/ diagnostic code to the host
via this register at different times.
Intel® Management Engine Interface (MEI) Subsystem Registers (D22:F0)
926 Datasheet
23.6.4 IDEFR—IDE Features Register
(IDER—D22:F2)
Address Offset: 01h Attribute: R/W
Default Value: 00h Size: 8 bits
This register implements the Feature register of the command block of the IDE
function. This register can be written only by the Host.
When the HOST reads the same address, it reads the Error register of Device 0 or
Device 1 depending on the device_select bit (bit 4 of the drive/head register).
23.6.5 IDESCIR—IDE Sector Count In Register
(IDER—D22:F2)
Address Offset: 02h Attribute: R/W
Default Value: 00h Size: 8 bits
This register implements the Sector Count register of the command block of the IDE
function. This register can be written only by the Host. When host writes to this
register, all 3 registers (IDESCIR, IDESCOR0, IDESCOR1) are updated with the written
value.
A host read to this register address reads the IDE Sector Count Out Register IDESCOR0
if DEV=0 or IDESCOR1 if DEV=1
23.6.6 IDESCOR1—IDE Sector Count Out Register Device 1
Register (IDER—D22:F2)
Address Offset: 02h Attribute: R/W
Default Value: 00h Size: 8 bits
This register is read by the HOST interface if DEV = 1. ME-Firmware writes to this
register at the end of a command of the selected device.
When the host writes to this address, the IDE Sector Count In Register (IDESCIR), this
register is updated.
Bit Description
7:0 IDE Feature Data (IDEFD)—R/W. IDE drive specific data written by the Host
Bit Description
7:0 IDE Sector Count Data (IDESCD)—R/W. Host writes the number of sectors to be
read or written.
Bit Description
7:0 IDE Sector Count Out Dev1 (ISCOD1)—R/W. Sector Count register for Slave
Device (that is, Device 1)
Datasheet 927
Intel® Management Engine Interface (MEI) Subsystem Registers (D22:F0)
23.6.7 IDESCOR0—IDE Sector Count Out Register Device
0 Register (IDER—D22:F2)
Address Offset: 02h Attribute: R/W
Default Value: 00h Size: 8 bits
This register is read by the HOST interface if DEV = 0. ME-Firmware writes to this
register at the end of a command of the selected device.
When the host writes to this address, the IDE Sector Count In Register (IDESCIR), this
register is updated.
23.6.8 IDESNOR0—IDE Sector Number Out Register
Device 0 Register (IDER—D22:F2)
Address Offset: 03h Attribute: R/W
Default Value: 00h Size: 8 bits
This register is read by the Host if DEV = 0. ME-Firmware writes to this register at the
end of a command of the selected device.
When the host writes to the IDE Sector Number In Register (IDESNIR), this register is
updated with that value.
23.6.9 IDESNOR1—IDE Sector Number Out Register
Device 1 Register (IDER—D22:F2)
Address Offset: 03h Attribute: R/W
Default Value: 00h Size: 8 bits
This register is read by the Host if DEV = 1. ME-Firmware writes to this register at the
end of a command of the selected device.
When the host writes to the IDE Sector Number In Register (IDESNIR), this register is
updated with that value.
Bit Description
7:0 IDE Sector Count Out Dev0 (ISCOD0)—R/W. Sector Count register for Master
Device (that is, Device 0).
Bit Description
7:0 IDE Sector Number Out DEV 0 (IDESNO0)—R/W. Sector Number Out register for
Master device.
Bit Description
7:0 IDE Sector Number Out DEV 1 (IDESNO1)—R/W. Sector Number Out register for
Slave device.
Intel® Management Engine Interface (MEI) Subsystem Registers (D22:F0)
928 Datasheet
23.6.10 IDESNIR—IDE Sector Number In Register Register
(IDER—D22:F2)
Address Offset: 03h Attribute: R/W
Default Value: 00h Size: 8 bits
This register implements the Sector Number register of the command block of the IDE
function. This register can be written only by the Host. When host writes to this
register, all 3 registers (IDESNIR, IDESNOR0, IDESNOR1) are updated with the written
value.
Host read to this register address reads the IDE Sector Number Out Register
IDESNOR0 if DEV=0 or IDESNOR1 if DEV=1.
23.6.11 IDECLIR—IDE Cylinder Low In Register Register
(IDER—D22:F2)
Address Offset: 04h Attribute: R/W
Default Value: 00h Size: 8 bits
This register implements the Cylinder Low register of the command block of the IDE
function. This register can be written only by the Host. When host writes to this
register, all 3 registers (IDECLIR, IDECLOR0, IDECLOR1) are updated with the written
value.
Host read to this register address reads the IDE Cylinder Low Out Register IDECLOR0 if
DEV=0 or IDECLOR1 if DEV=1.
23.6.12 IDCLOR1—IDE Cylinder Low Out Register Device 1
Register (IDER—D22:F2)
Address Offset: 04h Attribute: R/W
Default Value: 00h Size: 8 bits
This register is read by the Host if DEV = 1. ME-Firmware writes to this register at the
end of a command of the selected device. When the host writes to the IDE Cylinder Low
In Register (IDECLIR), this register is updated with that value.
Bit Description
7:0 IDE Sector Number Data (IDESND)—R/W. This register contains the number of
the first sector to be transferred.
Bit Description
7:0 IDE Cylinder Low Data (IDECLD)R/W. Cylinder Low register of the command
block of the IDE function.
Bit Description
7:0 IDE Cylinder Low Out DEV 1. (IDECLO1)—R/W. Cylinder Low Out Register for
Slave Device.
Datasheet 929
Intel® Management Engine Interface (MEI) Subsystem Registers (D22:F0)
23.6.13 IDCLOR0—IDE Cylinder Low Out Register Device 0
Register (IDER—D22:F2)
Address Offset: 04h Attribute: R/W
Default Value: 00h Size: 8 bits
This register is read by the Host if DEV = 0. ME-Firmware writes to this register at the
end of a command of the selected device. When the host writes to the IDE Cylinder Low
In Register (IDECLIR), this register is updated with that value.
23.6.14 IDCHOR0—IDE Cylinder High Out Register Device 0
Register (IDER—D22:F2)
Address Offset: 05h Attribute: R/W
Default Value: 00h Size: 8 bits
This register is read by the Host if DEVice = 0. ME-Firmware writes to this register at
the end of a command of the selected device. When the host writes to the IDE Cylinder
High In Register (IDECHIR), this register is updated with that value.
23.6.15 IDCHOR1—IDE Cylinder High Out Register Device 1
Register (IDER—D22:F2)
Address Offset: 05h Attribute: R/W
Default Value: 00h Size: 8 bits
This register is read by the Host if Device = 1. ME-Firmware writes to this register at
the end of a command of the selected device. When the host writes to the IDE Cylinder
High In Register (IDECHIR), this register is updated with that value.
Bit Description
7:0 IDE Cylinder Low Out DEV 0. (IDECLO0)—R/W. Cylinder Low Out Register for
Master Device.
Bit Description
7:0 IDE Cylinder High Out DEV 0 (IDECHO0)—R/W. Cylinder High out register for
Master device.
Bit Description
7:0 IDE Cylinder High Out DEV 1 (IDECHO1)—R/W. Cylinder High out register for
Slave device.
Intel® Management Engine Interface (MEI) Subsystem Registers (D22:F0)
930 Datasheet
23.6.16 IDECHIR—IDE Cylinder High In Register
(IDER—D22:F2)
Address Offset: 05h Attribute: R/W
Default Value: 00h Size: 8 bits
This register implements the Cylinder High register of the command block of the IDE
function. This register can be written only by the Host. When host writes to this
register, all 3 registers (IDECHIR, IDECHOR0, IDECHOR1) are updated with the written
value.
Host read to this register address reads the IDE Cylinder High Out Register IDECHOR0
if DEV=0 or IDECHOR1 if DEV=1.
23.6.17 IDEDHIR—IDE Drive/Head In Register
(IDER—D22:F2)
Address Offset: 06h Attribute: R/W
Default Value: 00h Size: 8 bits
This register implements the Drive/Head register of the command block of the IDE.
This register can be written only by the Host. When host writes to this register, all 3
registers (IDEDHIR, IDEDHOR0, IDEDHOR1) are updated with the written value.
Host read to this register address reads the IDE Drive/Head Out Register (IDEDHOR0)
if DEV=0 or IDEDHOR1 if DEV=1.
Bit 4 of this register is the DEV (master/slave) bit. This bit is cleared by hardware on
IDE software reset (S_RST toggles to '1') in addition to Host system reset and D3->D0
transition of the function.
Bit Description
7:0 IDE Cylinder High Data (IDECHD)R/W. Cylinder High data register for IDE
command block.
Bit Description
7:0 IDE Drive/Head Data (IDEDHD)—R/W. Register defines the drive number, head
number and addressing mode.
Datasheet 931
Intel® Management Engine Interface (MEI) Subsystem Registers (D22:F0)
23.6.18 IDDHOR1—IDE Drive Head Out Register Device 1
Register (IDER—D22:F2)
Address Offset: 06h Attribute: R/W
Default Value: 00h Size: 8 bits
This register is read only by the Host. Host read to this Drive/head In register address
reads the IDE Drive/Head Out Register (IDEDHOR0) if DEV=1
Bit 4 of this register is the DEV (master/slave) bit. This bit is cleared by hardware on
IDE software reset (S_RST toggles to '1') in addition to the Host system reset and D3
to D0 transition of the IDE function.
When the host writes to this address, it updates the value of the IDEDHIR register.
23.6.19 IDDHOR0—IDE Drive Head Out Register Device 0
Register (IDER—D22:F2)
Address Offset: 06h Attribute: R/W
Default Value: 00h Size: 8 bits
This register is read only by the Host. Host read to this Drive/head In register address
reads the IDE Drive/Head Out Register (IDEDHOR0) if DEV=0.
Bit 4 of this register is the DEV (master/slave) bit. This bit is cleared by hardware on
IDE software reset (S_RST toggles to 1) in addition to the Host system reset and D3 to
D0 transition of the IDE function.
When the host writes to this address, it updates the value of the IDEDHIR register.
Bit Description
7:0 IDE Drive Head Out DEV 1 (IDEDHO1)—R/W. Drive/Head Out register of Slave
device.
Bit Description
7:0 IDE Drive Head Out DEV 0 (IDEDHO0)—R/W. Drive/Head Out register of Master
device.
Intel® Management Engine Interface (MEI) Subsystem Registers (D22:F0)
932 Datasheet
23.6.20 IDESD0R—IDE Status Device 0 Register
(IDER—D22:F2)
Address Offset: 07h Attribute: R/W
Default Value: 80h Size: 8 bits
This register implements the status register of the Master device (DEV = 0). This
register is read only by the Host. Host read of this register clears the Master device's
interrupt.
When the HOST writes to the same address it writes to the command register
The bits description is for ATA mode.
Bit Description
7
Busy (BSY)—R/W. This bit is set by HW when the IDECR is being written and
DEV=0, or when SRST bit is asserted by Host or host system reset or D3-to-D0
transition of the IDE function.
This bit is cleared by FW write of 0.
6Drive Ready (DRDY)—R/W. When set, this bit indicates drive is ready for command.
5Drive Fault (DF)—R/W. Indicates Error on the drive.
4Drive Seek Complete (DSC)—R/W. Indicates Heads are positioned over the desired
cylinder.
3Data Request (DRQ)—R/W. Set when, the drive wants to exchange data with the
Host via the data register.
2Corrected Data (CORR)—R/W. When set, this bit indicates a correctable read error
has occurred.
1Index (IDX)—R/W. This bit is set once per rotation of the medium when the index
mark passes under the read/write head.
0
Error (ERR)—R/W. When set, this bit indicates an error occurred in the process of
executing the previous command. The Error Register of the selected device contains
the error information.
Datasheet 933
Intel® Management Engine Interface (MEI) Subsystem Registers (D22:F0)
23.6.21 IDESD1R—IDE Status Device 1 Register
(IDER—D22:F2)
Address Offset: 07h Attribute: R/W
Default Value: 80h Size: 8 bits
This register implements the status register of the slave device (DEV = 1). This register
is read only by the Host. Host read of this register clears the slave device's interrupt.
When the HOST writes to the same address it writes to the command register.
The bits description is for ATA mode.
23.6.22 IDECR—IDE Command Register (IDER—D22:F2)
Address Offset: 07h Attribute: R/W
Default Value: 00h Size: 8 bits
This register implements the Command register of the command block of the IDE
function. This register can be written only by the Host.
When the HOST reads the same address it reads the Status register DEV0 if DEV=0 or
Status Register DEV1 if DEV=1 (Drive/Head register bit [4]).
Bit Description
7
Busy (BSY)—R/W. This bit is set by hardware when the IDECR is being written and
DEV=0, or when SRST bit is asserted by the Host or host system reset or D3-to-D0
transition of the IDE function.
This bit is cleared by FW write of 0.
6Drive Ready (DRDY)—R/W. When set, indicates drive is ready for command.
5Drive Fault (DF)—R/W. Indicates Error on the drive.
4Drive Seek Complete (DSC)—R/W. Indicates Heads are positioned over the
desired cylinder.
3Data Request (DRQ)—R/W. Set when the drive wants to exchange data with the
Host via the data register.
2Corrected Data (CORR)—R/W. When set indicates a correctable read error has
occurred.
1Index (IDX)—R/W. This bit is set once per rotation of the medium when the index
mark passes under the read/write head.
0
Error (ERR)—R/W. When set, this bit indicates an error occurred in the process of
executing the previous command. The Error Register of the selected device contains
the error information
Bit Description
7:0 IDE Command Data (IDECD)—R/W. Host sends the commands (read/ write, etc.)
to the drive via this register.
Intel® Management Engine Interface (MEI) Subsystem Registers (D22:F0)
934 Datasheet
23.7 IDE BAR1
23.7.1 IDDCR—IDE Device Control Register (IDER—D22:F2)
Address Offset: 2h Attribute: WO
Default Value: 00h Size: 8 bits
This register implements the Device Control register of the Control block of the IDE
function. This register is Write only by the Host.
When the HOST reads to the same address it reads the Alternate Status register.
23.7.2 IDASR—IDE Alternate status Register (IDER—D22:F2)
Address Offset: 2h Attribute: RO
Default Value: 00h Size: 8 bits
This register implements the Alternate Status register of the Control block of the IDE
function. This register is a mirror register to the status register in the command block.
Reading this register by the HOST does not clear the IDE interrupt of the DEV selected
device
Host read of this register when DEV=0 (Master), Host gets the mirrored data of
IDESD0R register.
Host read of this register when DEV=1 (Slave), host gets the mirrored data of IDESD1R
register.
Address
Offset
Register
Symbol Register Name Default
Value Attribute
2h IDDCR IDE Device Control Register 00h RO, WO
2h IDASR IDE Alternate status Register 00h RO
Bit Description
7:3 Reserved
2Software reset (S_RST)—WO. When this bit is set by the Host, it forces a reset to
the device.
1Host interrupt Disable (nIEN)—WO. When set, this bit disables hardware from
sending interrupt to the Host.
0 Reserved
Bit Description
7:0 IDE Alternate Status Register (IDEASR)—RO. This field mirrors the value of the
DEV0/ DEV1 status register, depending on the state of the DEV bit on Host reads.
Datasheet 935
Intel® Management Engine Interface (MEI) Subsystem Registers (D22:F0)
23.8 IDE BAR4
Table 23-6. IDE BAR4 Register Address Map
Address
Offset
Register
Symbol Register Name Default
Value Attribute
0h IDEPBMCR IDE Primary Bus Master Command
Register 00h RO, R/W
1h IDEPBMDS0R IDE Primary Bus Master Device Specific 0
Register 00h R/W
2h IDEPBMSR IDE Primary Bus Master Status Register 80h RO, R/W
3h IDEPBMDS1R IDE Primary Bus Master Device Specific 1
Register 00h R/W
4h IDEPBMDTPR0 IDE Primary Bus Master Descriptor Table
Pointer Register Byte 0 00h R/W
5h IDEPBMDTPR1 IDE Primary Bus Master Descriptor Table
Pointer Register Byte 1 00h R/W
6h IDEPBMDTPR2 IDE Primary Bus Master Descriptor Table
Pointer Register Byte 2 00h R/W
7h IDEPBMDTPR3 IDE Primary Bus Master Descriptor Table
Pointer Register Byte 3 00h R/W
8h IDESBMCR IDE Secondary Bus Master Command
Register 00h RO, R/W
9h IDESBMDS0R IDE Secondary Bus Master Device
Specific 0 Register 00h R/W
Ah IDESBMSR IDE Secondary Bus Master Status
Register 00h R/W, RO
Bh IDESBMDS1R IDE Secondary Bus Master Device
Specific 1 Register 00h R/W
Ch IDESBMDTPR0 IDE Secondary Bus Master Descriptor
Table Pointer Register Byte 0 00h R/W
Dh IDESBMDTPR1 IDE Secondary Bus Master Descriptor
Table Pointer Register Byte 1 00h R/W
Eh IDESBMDTPR2 IDE Secondary Bus Master Descriptor
Table Pointer Register Byte 2 00h R/W
Fh IDESBMDTPR3 IDE Secondary Bus Master Descriptor
Table Pointer Register Byte 3 00h R/W
Intel® Management Engine Interface (MEI) Subsystem Registers (D22:F0)
936 Datasheet
23.8.1 IDEPBMCR—IDE Primary Bus Master Command
Register (IDER—D22:F2)
Address Offset: 00h Attribute: RO, R/W
Default Value: 00h Size: 8 bits
This register implements the bus master command register of the primary channel.
This register is programmed by the Host.
23.8.2 IDEPBMDS0R—IDE Primary Bus Master Device
Specific 0 Register (IDER—D22:F2)
Address Offset: 01h Attribute: R/W
Default Value: 00h Size: 8 bits
Bit Description
7:4 Reserved
3
Read Write Command (RWC)R/W. This bit sets the direction of bus master
transfer.
0 = Reads are performed from system memory
1 = Writes are performed to System Memory.
This bit should not be changed when the bus master function is active.
2:1 Reserved
0
Start/Stop Bus Master (SSBM)—R/W. This bit gates the bus master operation of
IDE function when 0. Writing 1 enables the bus master operation. Bus master
operation can be halted by writing a 0 to this bit. Operation cannot be stopped and
resumed.
This bit is cleared after data transfer is complete as indicated by either the BMIA bit
or the INT bit of the Bus Master status register is set or both are set.
Bit Description
7:0 Device Specific Data0 (DSD0)—R/W. Device Specific
Datasheet 937
Intel® Management Engine Interface (MEI) Subsystem Registers (D22:F0)
23.8.3 IDEPBMSR—IDE Primary Bus Master Status
Register (IDER—D22:F2)
Address Offset: 02h Attribute: RO, R/W
Default Value: 80h Size: 8 bits
23.8.4 IDEPBMDS1R—IDE Primary Bus Master Device
Specific 1 Register (IDER—D22:F2)
Address Offset: 03h Attribute: R/W
Default Value: 00h Size: 8 bits
Bit Description
7
Simplex Only (SO)—RO. Value indicates whether both Bus Master Channels can be
operated at the same time or not.
0 = Both can be operated independently
1 = Only one can be operated at a time.
6Drive 1 DMA Capable (D1DC)—R/W. This bit is read/write by the host (not write 1
clear).
5Drive 0 DMA Capable (D0DC)—R/W. This bit is read/write by the host (not write 1
clear).
4:3 Reserved
2
Interrupt (INT)—R/W. This bit is set by the hardware when it detects a positive
transition in the interrupt logic (see IDE host interrupt generation diagram).The
hardware will clear this bit when the Host SW writes 1 to it.
1Error (ER)—R/W. Bit is typically set by FW. Hardware will clear this bit when the Host
SW writes 1 to it.
0
Bus Master IDE Active (BMIA)—RO. This bit is set by hardware when SSBM
register is set to 1 by the Host. When the bus master operation ends (for the whole
command) this bit is cleared by FW. This bit is not cleared when the HOST writes 1 to
it.
Bit Description
7:0 Device Specific Data1 (DSD1)—R/W. Device Specific Data.
Intel® Management Engine Interface (MEI) Subsystem Registers (D22:F0)
938 Datasheet
23.8.5 IDEPBMDTPR0—IDE Primary Bus Master Descriptor
Table Pointer Byte 0 Register (IDER—D22:F2)
Address Offset: 04h Attribute: R/W
Default Value: 00h Size: 8 bits
23.8.6 IDEPBMDTPR1—IDE Primary Bus Master Descriptor
Table Pointer Byte 1 Register (IDER—D22:F2)
Address Offset: 05h Attribute: R/W
Default Value: 00h Size: 8 bits
23.8.7 IDEPBMDTPR2—IDE Primary Bus Master Descriptor
Table Pointer Byte 2 Register (IDER—D22:F2)
Address Offset: 06h Attribute: R/W
Default Value: 00h Size: 8 bits
23.8.8 IDEPBMDTPR3—IDE Primary Bus Master Descriptor
Table Pointer Byte 3 Register (IDER—D22:F2)
Address Offset: 07h Attribute: R/W
Default Value: 00h Size: 8 bits
Bit Description
7:0
Descriptor Table Pointer Byte 0 (DTPB0)—R/W. This register implements the
Byte 0 (1 of 4 bytes) of the descriptor table Pointer (four I/O byte addresses) for bus
master operation of the primary channel. This register is read/write by the HOST
interface.
Bit Description
7:0
Descriptor Table Pointer Byte 1 (DTPB1)—R/W. This register implements the
Byte 1 (of four bytes) of the descriptor table Pointer (four I/O byte addresses) for bus
master operation of the primary channel. This register is programmed by the Host.
Bit Description
7:0
Descriptor Table Pointer Byte 2 (DTPB2)—R/W. This register implements the
Byte 2 (of four bytes) of the descriptor table Pointer (four I/O byte addresses) for bus
master operation of the primary channel. This register is programmed by the Host.
Bit Description
7:0
Descriptor Table Pointer Byte 3 (DTPB3)—R/W. This register implements the
Byte 3 (of four bytes) of the descriptor table Pointer (four I/O byte addresses) for bus
master operation of the primary channel. This register is programmed by the Host
Datasheet 939
Intel® Management Engine Interface (MEI) Subsystem Registers (D22:F0)
23.8.9 IDESBMCR—IDE Secondary Bus Master Command
Register (IDER—D22:F2)
Address Offset: 08h Attribute: R/W
Default Value: 00h Size: 8 bits
23.8.10 IDESBMDS0R—IDE Secondary Bus Master Device
Specific 0 Register (IDER—D22:F2)
Address Offset: 09h Attribute: R/W
Default Value: 00h Size: 8 bits
Bit Description
7:4 Reserved
3
Read Write Command (RWC)—R/W. This bit sets the direction of bus master
transfer. When 0, Reads are performed from system memory; when 1, writes are
performed to System Memory. This bit should not be changed when the bus master
function is active.
2:1 Reserved
0
Start/Stop Bus Master (SSBM)—R/W. This bit gates the bus master operation of
IDE function when zero.
Writing 1 enables the bus master operation. Bus master operation can be halted by
writing a 0 to this bit. Operation cannot be stopped and resumed.
This bit is cleared after data transfer is complete as indicated by either the BMIA bit
or the INT bit of the Bus Master status register is set or both are set.
Bit Description
7:0
Device Specific Data0 (DSD0)R/W. This register implements the bus master
Device Specific 1 register of the secondary channel. This register is programmed by
the Host.
Intel® Management Engine Interface (MEI) Subsystem Registers (D22:F0)
940 Datasheet
23.8.11 IDESBMSR—IDE Secondary Bus Master Status
Register (IDER—D22:F2)
Address Offset: 0Ah Attribute: R/W, RO
Default Value: 80h Size: 8 bits
23.8.12 IDESBMDS1R—IDE Secondary Bus Master Device
Specific 1 Register (IDER—D22:F2)
Address Offset: 0Bh Attribute: R/W
Default Value: 00h Size: 8 bits
23.8.13 IDESBMDTPR0—IDE Secondary Bus Master Descriptor
Table Pointer Byte 0 Register (IDER—D22:F2)
Address Offset: 0Ch Attribute: R/W
Default Value: 00h Size: 8 bits
Bit Description
7
Simplex Only (SO)—R/W. This bit indicates whether both Bus Master Channels can
be operated at the same time or not.
0 = Both can be operated independently
1 = Only one can be operated at a time.
6Drive 1 DMA Capable (D1DC)—R/W. This bit is read/write by the host.
5Drive 0 DMA Capable (D0DC)—R/W. This bit is read/write by the host.
4:0 Reserved
Bit Description
7:0
Device Specific Data1 (DSD1)—R/W. This register implements the bus master
Device Specific 1 register of the secondary channel. This register is programmed by
the Host for device specific data if any.
Bit Description
7:0
Descriptor Table Pointer Byte 0 (DTPB0)—R/W. This register implements the
Byte 0 (1 of 4 bytes) of the descriptor table Pointer (four I/O byte addresses) for bus
master operation of the secondary channel. This register is read/write by the HOST
interface.
Datasheet 941
Intel® Management Engine Interface (MEI) Subsystem Registers (D22:F0)
23.8.14 IDESBMDTPR1—IDE Secondary Bus Master Descriptor
Table Pointer Byte 1 Register (IDER—D22:F2)
Address Offset: 0Dh Attribute: R/W
Default Value: 00h Size: 8 bits
23.8.15 IDESBMDTPR2—IDE Secondary Bus Master Descriptor
Table Pointer Byte 2 Register (IDER—D22:F2)
Address Offset: 0Eh Attribute: R/W
Default Value: 00h Size: 8 bits
23.8.16 IDESBMDTPR3—IDE Secondary Bus Master Descriptor
Table Pointer Byte 3 Register (IDER—D22:F2)
Address Offset: 0Fh Attribute: R/W
Default Value: 00h Size: 8 bits
Bit Description
7:0
Descriptor Table Pointer Byte 1 (DTPB1)R/W. This register implements the
Byte 1 (of four bytes) of the descriptor table Pointer (four I/O byte addresses) for bus
master operation of the secondary channel. This register is programmed by the Host.
Bit Description
7:0
Descriptor Table Pointer Byte 2 (DTPB2)R/W. This register implements the
Byte 2 (of four bytes) of the descriptor table Pointer (four I/O byte addresses) for bus
master operation of the secondary channel. This register is programmed by the Host.
Bit Description
7:0
Descriptor Table Pointer Byte 3 (DTPB3)R/W. This register implements the
Byte 3 (of four bytes) of the descriptor table Pointer (four I/O byte addresses) for bus
master operation of the secondary channel. This register is programmed by the Host.
Intel® Management Engine Interface (MEI) Subsystem Registers (D22:F0)
942 Datasheet
23.9 Serial Port for Remote Keyboard and Text (KT)
Redirection (KT—D22:F3)
Table 23-7. Serial Port for Remote Keyboard and Text (KT) Redirection Register
Address Map
Address
Offset
Register
Symbol Register Name Default
Value Attribute
00–01h VID Vendor Identification 8086h RO
02–03h DID Device Identification
See
Register
description
RO
04–05h CMD Command Register 0000h RO, R/W
06–07h STS Device Status 00B0h RO
08h RID Revision ID
See
Register
description
RO
09–0Bh CC Class Codes 070002h RO
0Ch CLS Cache Line Size 00h RO
10–13h KTIBA KT IO Block Base Address 00000001h RO, R/W
14–17h KTMBA KT Memory Block Base Address 00000000h RO, R/W
2C–2Fh SS Sub System Identifiers 00008086h R/WO
30–33h EROM Expansion ROM Base Address 00000000h RO
34h CAP Capabilities Pointer C8h RO
3C–3Dh INTR Interrupt Information 0200h R/W, RO
C8–C9h PID PCI Power Management Capability ID D001h RO
CA–CBh PC PCI Power Management Capabilities 0023h RO
CC–CFh PMCS PCI Power Management Control and
Status 00000000h RO, R/W
D0–D1h MID Message Signaled Interrupt Capability ID 0005h RO
D2–D3h MC Message Signaled Interrupt Message
Control 0080h RO, R/W
D4–D7h MA Message Signaled Interrupt Message
Address 00000000h RO, R/W
D8–DBh MAU Message Signaled Interrupt Message
Upper Address 00000000h RO, R/W
DC–DDh MD Message Signaled Interrupt Message
Data 0000h R/W
Datasheet 943
Intel® Management Engine Interface (MEI) Subsystem Registers (D22:F0)
23.9.1 VVID—Vendor Identification Register (KT—D22:F3)
Address Offset: 00–01h Attribute: RO
Default Value: 8086h Size: 16 bits
23.9.2 DID—Device Identification Register (KT—D22:F3)
Address Offset: 02–03h Attribute: RO
Default Value: See bit description Size: 16 bits
23.9.3 CMD—Command Register Register (KT—D22:F3)
Address Offset: 04–05h Attribute: RO, R/W
Default Value: 0000h Size: 16 bits
Bit Description
15:0 Vendor ID (VID)—RO. This is a 16-bit value assigned by Intel.
Bit Description
15:0
Device ID (DID)—RO. This is a 16-bit value assigned to the PCH KT controller. See
the Intel® 5 Series Chipset and Intel® 3400 Series Chipset Specification Update for
the value of the Device ID Register.
Bit Description
15:11 Reserved
10
Interrupt Disable (ID)—R/W. This bit disables pin-based INTx# interrupts. This bit
has no effect on MSI operation.
1 = Internal INTx# messages will not be generated.
0 = Internal INTx# messages are generated if there is an interrupt and MSI is not
enabled.
9:3 Reserved
2
Bus Master Enable (BME)—R/W. This bit controls the KT function's ability to act as
a master for data transfers. This bit does not impact the generation of completions
for split transaction commands. For KT, the only bus mastering activity is MSI
generation.
1Memory Space Enable (MSE)—R/W. This bit controls Access to the PT function's
target memory space.
0I/O Space enable (IOSE)—R/W. This bit controls access to the PT function's target
I/O space.
Intel® Management Engine Interface (MEI) Subsystem Registers (D22:F0)
944 Datasheet
23.9.4 STS—Device Status Register (KT—D22:F3)
Address Offset: 06–07h Attribute: RO
Default Value: 00B0h Size: 16 bits
23.9.5 RID—Revision ID Register (KT—D22:F3)
Address Offset: 08h Attribute: RO
Default Value: See bit description Size: 8 bits
23.9.6 CC—Class Codes Register (KT—D22:F3)
Address Offset: 09–0Bh Attribute: RO
Default Value: 070002h Size: 24 bits
Bit Description
15:11 Reserved
10:9 DEVSEL# Timing Status (DEVT)—RO. This field controls the device select time for
the PT function's PCI interface.
8:5 Reserved
4Capabilities List (CL)—RO. This bit indicates that there is a capabilities pointer
implemented in the device.
3
Interrupt Status (IS)—RO. This bit reflects the state of the interrupt in the function.
Setting of the Interrupt Disable bit to 1 has no affect on this bit. Only when this bit is
a 1 and ID bit is 0 is the INTB interrupt asserted to the Host.
2:0 Reserved
Bit Description
7:0 Revision ID (RID)—RO. See the Intel® 5 Series Chipset and Intel® 3400 Series
Chipset Specification Update for the value of the Device ID Register.
Bit Description
23:16 Base Class Code (BCC)—RO This field indicates the base class code of the KT host
controller device.
15:8 Sub Class Code (SCC)—RO This field indicates the sub class code of the KT host
controller device.
7:0 Programming Interface (PI)—RO This field indicates the programming interface of
the KT host controller device.
Datasheet 945
Intel® Management Engine Interface (MEI) Subsystem Registers (D22:F0)
23.9.7 CLS—Cache Line Size Register (KT—D22:F3)
Address Offset: 0Ch Attribute: RO
Default Value: 00h Size: 8 bits
This register defines the system cache line size in DWORD increments. Mandatory for
master which use the Memory-Write and Invalidate command.
23.9.8 KTIBA—KT IO Block Base Address Register
(KT—D22:F3)
Address Offset: 10–13h Attribute: RO, R/W
Default Value: 00000001h Size: 32 bits
23.9.9 KTMBA—KT Memory Block Base Address Register
(KT—D22:F3)
Address Offset: 14–17h Attribute: RO, R/W
Default Value: 00000000h Size: 32 bits
Bit Description
7:0 Cache Line Size (CLS)—RO. All writes to system memory are Memory Writes.
Bit Description
31:16 Reserved
15:3 Base Address (BAR)—R/W. This field provides the base address of the I/O space (8
consecutive I/O locations).
2:1 Reserved
0Resource Type Indicator (RTE)—RO. This bit indicates a request for I/O space
Bit Description
31:12 Base Address (BAR)—R/W. This field provides the base address for Memory
Mapped I,O BAR. Bits 31:12 correspond to address signals 31:12.
11:4 Reserved
3Prefetchable (PF)—RO. This bit indicates that this range is not pre-fetchable.
2:1 Type (TP)—RO. This field indicates that this range can be mapped anywhere in 32-
bit address space.
0Resource Type Indicator (RTE)—RO. This bit indicates a request for register
memory space.
Intel® Management Engine Interface (MEI) Subsystem Registers (D22:F0)
946 Datasheet
23.9.10 SVID—Subsystem Vendor ID Register (KT—D22:F3)
Address Offset: 2Ch2Dh Attribute: R/WO
Default Value: 0000h Size: 16 bits
23.9.11 SID—Subsystem ID Register (KT—D22:F3)
Address Offset: 2Eh2Fh Attribute: R/WO
Default Value: 8086h Size: 16 bits
23.9.12 CAP—Capabilities Pointer Register (KT—D22:F3)
Address Offset: 34h Attribute: RO
Default Value: C8h Size: 8 bits
This optional register is used to point to a linked list of new capabilities implemented by
the device.
23.9.13 INTR—Interrupt Information Register (KT—D22:F3)
Address Offset: 3C–3Dh Attribute: R/W, RO
Default Value: 0200h Size: 16 bits
Bit Description
15:0
Subsystem Vendor ID (SSVID)R/WO. Indicates the sub-system vendor identifier.
This field should be programmed by BIOS during boot-up. Once written, this register
becomes Read Only. This field can only be cleared by PLTRST#.
Bit Description
15:0
Subsystem ID (SSID)—R/WO. Indicates the sub-system identifier. This field should
be programmed by BIOS during boot-up. Once written, this register becomes Read
Only. This field can only be cleared by PLTRST#.
Bit Description
7:0 Capability Pointer (CP)—RO. This field indicates that the first capability pointer is
offset C8h (the power management capability).
Bit Description
15:8
Interrupt Pin (IPIN)—RO. A value of 1h/2h/3h/4h indicates that this function
implements legacy interrupt on INTA/INTB/INTC/INTD, respectively
Function Value INTx
(3 KT/Serial Port) 02h INTB
7:0
Interrupt Line (ILINE)—R/W. The value written in this register tells which input of
the system interrupt controller, the device's interrupt pin is connected to. This value
is used by the OS and the device driver, and has no affect on the hardware.
Datasheet 947
Intel® Management Engine Interface (MEI) Subsystem Registers (D22:F0)
23.9.14 PID—PCI Power Management Capability ID Register
(KT—D22:F3)
Address Offset: C8–C9h Attribute: RO
Default Value: D001h Size: 16 bits
23.9.15 PC—PCI Power Management Capabilities ID Register
(KT—D22:F3)
Address Offset: CA–CBh Attribute: RO
Default Value: 0023h Size: 16 bits
23.9.16 MID—Message Signaled Interrupt Capability ID
Register (KT—D22:F3)
Address Offset: D0–D1h Attribute: RO
Default Value: 0005h Size: 16 bits
Message Signalled Interrupt is a feature that allows the device/function to generate an
interrupt to the host by performing a DWORD memory write to a system specified
address with system specified data. This register is used to identify and configure an
MSI capable device.
Bit Description
15:8 Next Capability (NEXT)—RO. A value of D0h points to the MSI capability.
7:0 Cap ID (CID)—RO. This field indicates that this pointer is a PCI power management.
Bit Description
15:11 PME Support (PME)—RO.This field indicates no PME# in the PT function.
10:6 Reserved
5Device Specific Initialization (DSI)—RO. This bit indicates that no device-specific
initialization is required.
4Reserved
3PME Clock (PMEC)—RO. This bit indicates that PCI clock is not required to generate
PME#
2:0 Version (VS)—RO. This field indicates support for the PCI Power Management
Specification, Revision 1.2.
Bit Description
15:8 Next Pointer (NEXT)—RO. This value indicates this is the last item in the list.
7:0 Capability ID (CID)—RO. This field value of Capabilities ID indicates device is
capable of generating MSI.
Intel® Management Engine Interface (MEI) Subsystem Registers (D22:F0)
948 Datasheet
23.9.17 MC—Message Signaled Interrupt Message Control
Register (KT—D22:F3)
Address Offset: D2–D3h Attribute: RO, R/W
Default Value: 0080h Size: 16 bits
23.9.18 MA—Message Signaled Interrupt Message Address
Register (KT—D22:F3)
Address Offset: D4–D7h Attribute: RO, R/W
Default Value: 00000000h Size: 32 bits
This register specifies the DWORD aligned address programmed by system software for
sending MSI.
23.9.19 MAU—Message Signaled Interrupt Message Upper
Address Register (KT—D22:F3)
Address Offset: D8–DBh Attribute: RO, R/W
Default Value: 00000000h Size: 32 bits
Bit Description
15:8 Reserved
764 Bit Address Capable (C64)—RO. Capable of generating 64-bit and 32-bit
messages.
6:4 Multiple Message Enable (MME)—R/W.These bits are R/W for software
compatibility, but only one message is ever sent by the PT function.
3:1 Multiple Message Capable (MMC)—RO. Only one message is required.
0MSI Enable (MSIE)—R/W. If set, MSI is enabled and traditional interrupt pins are
not used to generate interrupts.
Bit Description
31:2 Address (ADDR)—R/W. Lower 32 bits of the system specified message address,
always DWord aligned.
1:0 Reserved
Bit Description
31:4 Reserved
3:0 Address (ADDR)—R/W. Upper 4 bits of the system specified message address.
Datasheet 949
Intel® Management Engine Interface (MEI) Subsystem Registers (D22:F0)
23.9.20 MD—Message Signaled Interrupt Message Data
Register (KT—D22:F3)
Address Offset: DC–DDh Attribute: R/W
Default Value: 0000h Size: 16 bits
This 16-bit field is programmed by system software if MSI is enabled
23.10 KT IO/ Memory Mapped Device Registers
Bit Description
15:0 Data (DATA)—R/W. This MSI data is driven onto the lower word of the data bus of
the MSI memory write transaction.
Table 23-8. KT IO/ Memory Mapped Device Register Address Map
Address
Offset
Register
Symbol Register Name Default
Value Attribute
0h KTRxBR KT Receive Buffer Register 00h RO
0h KTTHR KT Transmit Holding Register 00h WO
0h KTDLLR KT Divisor Latch LSB Register 00h R/W
1h KTIER KT Interrupt Enable register 00h R/W
RO
1h KTDLMR KT Divisor Latch MSB Register 00h R/W
2h KTIIR KT Interrupt Identification register 01h RO
2h KTFCR KT FIFO Control register 00h WO
3h KTLCR KT Line Control register 03h R/W
4h KTMCR KT Modem Control register 00h RO, R/W
5h KTLSR KT Line Status register 00h RO
6h KTMSR KT Modem Status register 00h RO
7h KTSCR KT Scratch register 00h R/W
Intel® Management Engine Interface (MEI) Subsystem Registers (D22:F0)
950 Datasheet
23.10.1 KTRxBR—KT Receive Buffer Register (KT—D23:F3)
Address Offset: 00h Attribute: RO
Default Value: 00h Size: 8 bits
This implements the KT Receiver Data register. Host access to this address, depends on
the state of the DLAB bit (KTLCR[7]). It must be 0 to access the KTRxBR.
RxBR:
Host reads this register when FW provides it the receive data in non-FIFO mode. In
FIFO mode, host reads to this register translate into a read from ME memory (RBR
FIFO).
23.10.2 KTTHR—KT Transmit Holding Register (KT—D23:F3)
Address Offset: 00h Attribute: RO
Default Value: 00h Size: 8 bits
This implements the KT Transmit Data register. Host access to this address, depends on
the state of the DLAB bit (KTLCR[7]). It must be 0 to access the KTTHR.
THR:
When host wants to transmit data in the non-FIFO mode, it writes to this register. In
FIFO mode, writes by host to this address cause the data byte to be written by
hardware to ME memory (THR FIFO).
Bit Description
7:0 Receiver Buffer Register (RBR)—RO. Implements the Data register of the Serial
Interface. If the Host does a read, it reads from the Receive Data Buffer.
Bit Description
7:0
Transmit Holding Register (THR)—WO. Implements the Transmit Data register of
the Serial Interface. If the Host does a write, it writes to the Transmit Holding
Register.
Datasheet 951
Intel® Management Engine Interface (MEI) Subsystem Registers (D22:F0)
23.10.3 KTDLLR—KT Divisor Latch LSB Register (KT—D23:F3)
Address Offset: 00h Attribute: R/W
Default Value: 00h Size: 8 bits
This register implements the KT DLL register. Host can Read/Write to this register only
when the DLAB bit (KTLCR[7]) is 1. When this bit is 0, Host accesses the KTTHR or the
KTRBR depending on Read or Write.
This is the standard Serial Port Divisor Latch register. This register is only for software
compatibility and does not affect performance of the hardware.
23.10.4 KTIER—KT Interrupt Enable Register (KT—D23:F3)
Address Offset: 01h Attribute: R/W
Default Value: 00h Size: 8 bits
This implements the KT Interrupt Enable register. Host access to this address, depends
on the state of the DLAB bit (KTLCR[7]). It must be "0" to access this register. The bits
enable specific events to interrupt the Host.
Bit Description
7:0 Divisor Latch LSB (DLL)—R/W. Implements the DLL register of the Serial Interface.
Bit Description
7:4 Reserved
3MSR (IER2)—R/W. When set, this bit enables bits in the Modem Status register to
cause an interrupt to the host.
2LSR (IER1)—R/W.When set, this bit enables bits in the Receiver Line Status Register
to cause an Interrupt to the Host.
1THR (IER1)—R/W. When set, this bit enables an interrupt to be sent to the Host
when the transmit Holding register is empty.
0DR (IER0)—R/W. When set, the Received Data Ready (or Receive FIFO Timeout)
interrupts are enabled to be sent to Host.
Intel® Management Engine Interface (MEI) Subsystem Registers (D22:F0)
952 Datasheet
23.10.5 KTDLMR—KT Divisor Latch MSB Register (KT—D23:F3)
Address Offset: 01h Attribute: R/W
Default Value: 00h Size: 8 bits
Host can Read/Write to this register only when the DLAB bit (KTLCR[7]) is 1. When this
bit is 0, Host accesses the KTIER.
This is the standard Serial interface's Divisor Latch register's MSB. This register is only
for SW compatibility and does not affect performance of the hardware.
23.10.6 KTIIR—KT Interrupt Identification Register
(KT—D23:F3)
Address Offset: 02h Attribute: RO
Default Value: 00h Size: 8 bits
The KT IIR register prioritizes the interrupts from the function into 4 levels and records
them in the IIR_STAT field of the register. When Host accesses the IIR, hardware
freezes all interrupts and provides the priority to the Host. Hardware continues to
monitor the interrupts but does not change its current indication until the Host read is
over. Table in the Host Interrupt Generation section shows the contents.
Bit Description
7:0 Divisor Latch MSB (DLM)—R/W. Implements the Divisor Latch MSB register of the
Serial Interface.
Bit Description
7FIFO Enable (FIEN1)—RO. This bit is connected by hardware to bit 0 in the FCR
register.
6FIFO Enable (FIEN0)—RO. This bit is connected by hardware to bit 0 in the FCR
register.
5:4 Reserved
3:1 IIR STATUS (IIRSTS)—RO. These bits are asserted by the hardware according to
the source of the interrupt and the priority level.
0
Interrupt Status (INTSTS)—RO.
0 = Pending interrupt to Host
1 = No pending interrupt to Host
Datasheet 953
Intel® Management Engine Interface (MEI) Subsystem Registers (D22:F0)
23.10.7 KTFCR—KT FIFO Control Register (KT—D23:F3)
Address Offset: 02h Attribute: WO
Default Value: 00h Size: 8 bits
When Host writes to this address, it writes to the KTFCR. The FIFO control Register of
the serial interface is used to enable the FIFOs, set the receiver FIFO trigger level and
clear FIFOs under the direction of the Host.
When Host reads from this address, it reads the KTIIR.
23.10.8 KTLCR—KT Line Control Register (KT—D23:F3)
Address Offset: 03h Attribute: R/W
Default Value: 00h Size: 8 bits
The line control register specifies the format of the asynchronous data communications
exchange and sets the DLAB bit. Most bits in this register have no affect on hardware
and are only used by the FW.
Bit Description
7:6
Receiver Trigger Level (RTL)—WO. Trigger level in bytes for the RCV FIFO. Once
the trigger level number of bytes is reached, an interrupt is sent to the Host.
00 = 01
01 = 04
10 = 08
11 = 14
5:3 Reserved
2XMT FIFO Clear (XFIC)—WO. When the Host writes one to this bit, the hardware
will clear the XMT FIFO. This bit is self-cleared by hardware.
1RCV FIFO Clear (RFIC)—WO. When the Host writes one to this bit, the hardware
will clear the RCV FIFO. This bit is self-cleared by hardware.
0
FIFO Enable (FIE)WO.When set, this bit indicates that the KT interface is working
in FIFO node. When this bit value is changed the RCV and XMT FIFO are cleared by
hardware.
Bit Description
7
Divisor Latch Address Bit (DLAB)—R/W. This bit is set when the Host wants to
read/write the Divisor Latch LSB and MSB Registers. This bit is cleared when the Host
wants to access the Receive Buffer Register or the Transmit Holding Register or the
Interrupt Enable Register.
6Break Control (BC)—R/W. This bit has no affect on hardware.
5:4 Parity Bit Mode (PBM)—R/W. This bit has no affect on hardware.
3Parity Enable (PE)—R/W.This bit has no affect on hardware.
2Stop Bit Select (SBS)—R/W. This bit has no affect on hardware.
1:0 Word Select Byte (WSB)—R/W. This bit has no affect on hardware.
Intel® Management Engine Interface (MEI) Subsystem Registers (D22:F0)
954 Datasheet
23.10.9 KTMCR—KT Modem Control Register (KT—D23:F3)
Address Offset: 04h Attribute: R/W
Default Value: 00h Size: 8 bits
The Modem Control Register controls the interface with the modem. Since the FW
emulates the modem, the Host communicates to the FW via this register. Register has
impact on hardware when the Loopback mode is on.
Bit Description
7:5 Reserved
4
Loop Back Mode (LBM)—R/W. When set by the Host, this bit indicates that the
serial port is in loop Back mode. This means that the data that is transmitted by the
host should be received. Helps in debug of the interface.
3
Output 2 (OUT2)—R/W. This bit has no affect on hardware in normal mode. In loop
back mode the value of this bit is written by hardware to the Modem Status Register
bit 7.
2
Output 1 (OUT1)—R/W. This bit has no affect on hardware in normal mode. In loop
back mode the value of this bit is written by hardware to Modem Status Register bit
6.
1
Request to Send Out (RTSO)—R/W. This bit has no affect on hardware in normal
mode. In loopback mode, the value of this bit is written by hardware to Modem Status
Register bit 4.
0
Data Terminal Ready Out (DRTO)—R/W. This bit has no affect on hardware in
normal mode. In loopback mode, the value in this bit is written by hardware to
Modem Status Register Bit 5.
Datasheet 955
Intel® Management Engine Interface (MEI) Subsystem Registers (D22:F0)
23.10.10 KTLSR—KT Line Status Register (KT—D23:F3)
Address Offset: 05h Attribute: WO
Default Value: 00h Size: 8 bits
This register provides status information of the data transfer to the Host. Error
indication, etc. are provided by the HW/FW to the host via this register.
Bit Description
7RX FIFO Error (RXFER)—RO. This bit is cleared in non FIFO mode. This bit is
connected to BI bit in FIFO mode.
6Transmit Shift Register Empty (TEMT)—RO. This bit is connected by HW to bit 5
(THRE) of this register.
5
Transmit Holding Register Empty (THRE)—RO. This bit is always set when the
mode (FIFO/Non-FIFO) is changed by the Host. This bit is active only when the THR
operation is enabled by the FW. This bit has acts differently in the different modes:
Non FIFO: This bit is cleared by hardware when the Host writes to the THR registers
and set by hardware when the FW reads the THR register.
FIFO mode: This bit is set by hardware when the THR FIFO is empty, and cleared by
hardware when the THR FIFO is not empty.
This bit is reset on Host system reset or D3->D0 transition.
4
Break Interrupt (BI)—RO. This bit is cleared by hardware when the LSR register is
being read by the Host.
This bit is set by hardware in two cases:
In FIFO mode the FW sets the BI bit by setting the SBI bit in the KTRIVR register
(See KT AUX registers)
In non-FIFO mode the FW sets the BI bit by setting the BIA bit in the KTRxBR
register (see KT AUX registers)
3:2 Reserved
1
Overrun Error (OE): This bit is cleared by hardware when the LSR register is being
read by the Host. The FW typically sets this bit, but it is cleared by hardware when
the host reads the LSR.
0
Data Ready (DR)—RO.
Non-FIFO Mode: This bit is set when the FW writes to the RBR register and cleared
by hardware when the RBR register is being Read by the Host.
FIFO Mode: This bit is set by hardware when the RBR FIFO is not empty and cleared
by hardware when the RBR FIFO is empty.
This bit is reset on Host System Reset or D3->D0 transition.
Intel® Management Engine Interface (MEI) Subsystem Registers (D22:F0)
956 Datasheet
23.10.11 KTMSR—KT Modem Status Register (KT—D23:F3)
Address Offset: 06h Attribute: RO
Default Value: 00h Size: 8 bits
The functionality of the Modem is emulated by the FW. This register provides the status
of the current state of the control lines from the modem.
§ §
Bit Description
7Data Carrier Detect (DCD)—RO. In Loop Back mode this bit is connected by
hardware to the value of MCR bit 3.
6Ring Indicator (RI)—RO. In Loop Back mode this bit is connected by hardware to
the value of MCR bit 2.
5Data Set Ready (DSR)—RO. In Loop Back mode this bit is connected by hardware
to the value of MCR bit 0.
4Clear To Send (CTS)—RO. In Loop Back mode this bit is connected by hardware to
the value of MCR bit 1.
3Delta Data Carrier Detect (DDCD)—RO. This bit is set when bit 7 is changed. This
bit is cleared by hardware when the MSR register is being read by the HOST driver.
2
Trailing Edge of Read Detector (TERI)—RO. This bit is set when bit 6 is changed
from 1 to 0. This bit is cleared by hardware when the MSR register is being read by
the Host driver.
1Delta Data Set Ready (DDSR)—RO. This bit is set when bit 5 is changed. This bit is
cleared by hardware when the MSR register is being read by the Host driver.
0Delta Clear To Send (DCTS)—RO. This bit is set when bit 4 is changed. This bit is
cleared by hardware when the MSR register is being read by the Host driver.