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CMAXQUSB User’s Guide
1
For pricing, delivery, and ordering information, please contact Maxim Direct
at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
General Description
The Maxim Command Module (CMAXQUSB) receives
commands from an IBM PC through the USB to create
an SPI™ or SMBus™/I2C-compatible interface. Maxim
evaluation kits (EV kits) that make use of the
CMAXQUSB require custom software and can be
ordered together as an evaluation system (EV system).
Ordering information for EV systems is included in the
EV kit’s corresponding data sheet.
An EV system is an EV kit combined with an interface
board such as a CMAXQUSB and custom software.
Refer to the appropriate EV kit data sheet for quick start
and detailed operating instructions.
The use of the CMAXQUSB as a MAXQ2000 develop-
ment target is not supported. Rather, use the
MAXQ2000
EV kit
(available at www.maxim-ic.com/MAXQ2000-KIT)
for this purpose.
The CMAXQUSB has been tested on Windows®98
Second Edition, Windows 2000, and Windows XP®.
Features
oPC-Controlled I/O Platform
oUSB Powered
oProvides 2.5V, 3.3V, or 5V to EV Kit
oSPI Bus: 8MHz Burst
oI2C/2-Wire Bus: Fast 400kHz/Standard 100kHz
oOptional 1.5kΩI2C Bus Pullup Resistors
Component List
19-3838; Rev 2; 12/10
Ordering Information
PART PC INTERFACE OPERATING SYSTEMS
SUPPORTED
CMAXQUSB+ USB Windows 98SE/2000/XP
DESIGNATION QTY DESCRIPTION
C1, C2, C3 3
22µF ±10%, 16V X5R ceramic
capacitors (1210)
TDK C3225X5R1C226K
C4 1
4.7µF ±10%, 10V X7R ceramic
capacitor (0805)
TDK C2012X5R1A475K
C5 1
0.033µF ±10%, 6.3V (min) X7R
ceramic capacitor (0603)
TDK C1608X7R1E333K
Murata GRM188R71E333K
Taiyo Yuden EMK107BJ333KA
C6, C7 2
22pF ±5% C0G ceramic capacitors
(0603)
TDK C1608C0G1H220J
Murata GRM1885C1H220J
C8, C9 2
10pF ±5% C0G ceramic capacitors
(0603)
Murata GRM1885C1H100J
TDK C1608C0G1H100J
C10–C16,
C23–C32
(on back of
board)
17
0.1µF ±10%, 10V (min) X7R ceramic
capacitors (0603)
TDK C1608X7R1E104K
DESIGNATION QTY DESCRIPTION
C17–C22
(on back of
board)
6
1µF, 6.3V (min) X7R ceramic
capacitors (0603)
TDK C1608X5R0J105K
Murata GRM188R60J105K
Taiyo Yuden JMK107BJ105MA
D1 1
100V, 1A bridge rectifier
(D-70/DIP-6)
Diodes Inc. DF005M
J2, J3,
JU2–JU5 0 Not installed, 2-pin headers
LED1, LED2 2 Red LEDs (T1-3/4)
Panasonic LN21RPH
LED3 1
Yellow (amber) LED (T1-3/4)
Panasonic LN41YPH
LED4 1
Green LED (T1-3/4)
Panasonic LN31GCPH
P2 1
USB type-B, right-angle PC-mount
receptacle
P3 1
20-pin (2 x 10) right-angle male
header
P4 1
40-pin (2 x 20) right-angle male
header
P5 (JTAG) 1 10-pin (2 x 5) vertical header,
keyed pin 7
SPI is a trademark of Motorola, Inc.
SMBus is a trademark of Intel Corp.
Windows and Windows XP are registered trademarks of
Microsoft Corp.
+
Denotes lead(Pb)-free and RoHS compliant.
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DESIGNATION QTY DESCRIPTION
P1 0 Not installed (2mm power jack)
P6 1 3-pin header
P7 1 4-pin header
P8 1 6-pin header
R1 1 2.2k ±5% resistor (1206)
R2, R5, R6 3 1.5k ±5% resistors (1206)
R7, R8–R11 5 470k ±5% resistors (1206)
R12, R13 2 27 ±5% resistors (1206)
R14 1 10k ±5% resistor (1206)
R18 1 4.7k ±5% resistor (1206)
R19 1 100k ±5% resistor (1206)
SW1 1 2-circuit DIP switch (DIP-4)
U1 1
Low-power microcontroller (68 QFN)
Maxim MAXQ2000-RAX+
U2 1
FTDI FT232BL (32 TQFP, 7mm x
7mm)
U3 1
LDO linear regulator (5 SC70)
Maxim MAX8511EXK25+T
(Top Mark: ADV)
U4 1
93C46 type 3-wire EEPROM
(8 SO)
16-bit architecture
U5 1
Low-voltage, p-channel MOSFET
(8 SO)
Maxim MAX890LESA+
U6, U7, U8 3
8-channel level translators
(20 TSSOP)
Maxim MAX3001EEUP+
DESIGNATION QTY DESCRIPTION
U9 1
Low-voltage level translator
(8 SOT23)
Maxim MAX3373EEKA+T
(Top Mark: AAKS)
U10 1
Low-voltage level translator
(14 TSSOP)
Maxim MAX3390EEUD+
U11 1
LDO linear regulator (5 SC70)
Maxim MAX8511EXK33+T
(Top Mark: AEI)
Y1 1
16MHz crystal (HC49/US)
Parallel resonant, 20pF load
Suntsu SCS20B-16.000MHz-I
Y2 1
6MHz crystal (HC49/US)
Parallel resonant, 20pF load
Suntsu SCS22B-6.000MHz-I
Y3 0 Not installed, 32.768kHz crystal
— 1 Vertical header 2 x 3 pins
— 4
Rubber bumpers,
0.100in H x 0.400in W square
— 1
USB high-speed A-to-B cable,
5ft (1.5m)
— 1 Shunt
— 1
PCB: COMMAND MODULE
(CMAXQUSB)
Component List (continued)
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CMAXQUSB User’s Guide
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SUPPLIER PHONE WEBSITE
Murata Electronics North America, Inc. 770-436-1300 www.murata-northamerica.com
Panasonic Corp. 800-344-2112 www.panasonic.com
Suntsu Frequency Control 949-305-0220 www.suntsuinc.com
Taiyo Yuden 800-348-2496 www.t-yuden.com
TDK Corp. 847-803-6100 www.component.tdk.com
Component Suppliers
Quick Start
Maxim EV systems whose ordering number ends in
EVCMAXQU are two-board sets, comprising a
CMAXQUSB interface board and an EV kit board specif-
ic to the device being evaluated. For example, the
MAX6870EVCMAXQU would be a two-board set consist-
ing of the MAX6870EVKIT and the CMAXQUSB. The fol-
lowing generic quick start procedure assumes that the
CMAXQUSB board will be used with a companion EV kit.
Required Equipment
• Any Maxim EV system with the EVCMAXQU suffix,
such as the MAX6870EVCMAXQU
Device-specific EV kit board
CMAXQUSB interface board
USB type A-to-B cable (
included with the CMAXQUSB
)
• Computer running Windows 98SE/2000/XP with a
spare USB port
Administrator privileges may be required when first
installing the device on Windows 2000/XP.
Procedure
Do not turn on the power until all connections are
complete.
1) Select 2.5V, 3.3V, or 5V logic by setting the
CMAXQUSB VDD SELECT jumper. See the
Jumper
Tables
section.
2) Ensure that the companion EV kit board’s jumper
settings are correct. Refer to your companion EV
kit’s documentation.
3) Connect the boards together.
4) Install the evaluation software on your computer by
running the INSTALL.EXE program on the installa-
tion disk. The program files are copied and icons
are created for them in the Windows Start menu.
5) Connect the USB cable between the CMAXQUSB
and the computer. When you plug in the CMAXQUSB
board for the first time, the Windows plug-and-play
system detects the new hardware and automatically
runs the Add New Hardware Wizard (if the Add New
Hardware Wizard does not appear after a minute,
unplug the board from the USB and plug it in again).
Make certain to specify the search location. Maxim
software designed for CMAXQUSB includes a copy
of the device driver in the installed software directo-
ry. Refer to Application Note 3601:
Troubleshooting
Windows Plug-and-Play and USB for Maxim
Evaluation Kits
for more details.
6) During device driver installation, Windows XP shows
a warning message indicating that the device driver
Maxim uses does not contain a digital signature.
This is not an error condition and it is safe to pro-
ceed with the installation.
7) Start the EV kit software by clicking its icon in the
Windows Start menu.
8) Refer to the companion EV kit’s documentation for fur-
ther instructions demonstrating its custom software.
Detailed Description of Hardware
The low-voltage RISC microcontroller, MAXQ2000-RAX
(U1), processes commands sent by a program running
on the PC. Each particular EV kit has its own custom
software specific to that kit.
The FTDI FT232BM (U2) provides the USB engine. The
USB 5V power is regulated down to 3.3V by U11 and
down to 2.5V by U3. LED1 indicates USB 5V power is pre-
sent. LED2, LED3, LED4 are general-purpose indicators.
Level translators U6–U10 convert the MAXQ2000’s
2.5V logic signals to the external VDD logic level, which
is jumper-selectable for 2.5V, 3.3V, or 5V logic. U9, the
MAX3372, is a bidirectional level translator specially
designed for the I2C bus. DIP switch SW1 optionally
disables the on-board 1.5kΩtermination resistors,
allowing the use of external, user-supplied I2C pullup
resistors. Level translator U10 is designed for SPI.
Note: Indicate that you are using the CMAXQUSB or MAXQ2000 when contacting these component suppliers.
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CMAXQUSB User’s Guide
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Connectors P3 and P4 are designed to allow hardware
compatibility with previous Maxim EV kit module
designs. Headers P7 and P8 allow convenient probing
of SMBus/I2C and SPI bus signals.
Connector P5 is used during factory test to program the
MAXQ2000 in-circuit using the JTAG interface. The
connector pinout is compatible with the MAXQ2000 EV
kit’s MAXQ-JTAG-001 board.
Platform Capabilities and Limitations
General-Purpose Input and Output (GPIO) Pins
LED1 is lit when VDD is powered. LED2, LED3, and LED4
are general-purpose software-controlled indicators, which
also connect to GPIO lines. When driven as inputs, the
output impedance should be less than 6000Ω.
SMBus/I
2
C/2-Wire Interface
The CMAXQUSB module offers “bit-banged” I2C at
400kHz (full speed, the default) or 100kHz (slow speed).
Optional user-switchable SCL/SDA pullup resistors are
provided on-board. Your PC and its software limits
attainable throughput. The SMBus/I2C bus runs in
bursts at rated speed, but there is some variable “dead
time” between transfers due to communications over-
head. Properly written PC software can minimize this
dead time but cannot completely eliminate it.
SPI/3-Wire Interface
The CMAXQUSB module offers SPI at up to 8MHz,
using the default pin configuration. All four CPOL/CPHA
modes are supported. Your PC and its software limits
attainable throughput. The SPI bus runs in bursts at
rated speed, but there is some variable “dead time”
between transfers, due to communications overhead.
Properly written PC software can minimize this dead
time but cannot completely eliminate it.
Power Supply
The CMAXQUSB is powered by the host PC’s universal
serial bus (USB). The VDD system voltage can be con-
figured for direct USB 5V power, 3.3V, or 2.5V using
one of two on-board linear regulators. An optional
external 9V DC plug-in transformer (“wall wart”) can be
connected for any EV kit board that requires this unreg-
ulated 9V DC power supply. Both the unregulated
9V DC and regulated VDD power-supply voltages are
provided to the EV kit board on the 2 x 10 (P3) and
2 x 20 (P4) connectors. Current available to a compan-
ion EV kit is 80mA.
During USB suspend, the FT232BM drives the MAX890
into a partially powered mode, bringing VDD up to
approximately 1.8V. No commands are sent to the
firmware during this mode, so there is no impact.
However, custom designs not requiring USB suspend
should consider removing the MAX890 to avoid this
problem.
Scripting and Data Acquisition
The CMAXQUSB can store a script of commands in its
internal memory to eliminate communication “dead
time.” A script may be repeated up to 256 times, but
branching and decision making are not supported. A
script may also have a maximum of 126 command/data
bytes. Up to 1024 bytes of data may be collected.
SMBus/I2C/2-Wire Bus Pullup Resistors
SMBus/I2C requires a pullup resistor on both SCL and
SDA. The CMAXQUSB provides 1.5kΩpullup resistors,
enabled by setting both circuits of DIP switch SW1
“ON.” If there are pullup resistors already on the bus,
disable the CMAXQUSB’s pullup resistors by setting
both circuits of SW1 “OFF.”
JUMPER POSITION FUNCTION
2.5V VDD = 2.5V
3.3V VDD = 3.3V
JU1 VDD
SELECT
5V VDD = 5V
J2
(underneath
SW1)
Open Factory assembly option:
replaces SW1-1.
J3
(underneath
SW1)
Open Factory assembly option:
replaces SW1-2.
JU2 Closed
Connects MAXQ2000 P6.2 to
P6.3, supporting the Maxim
1-Wire® interface.
Open JTAG connector P5 does not
connect to the +5V supply.
JU4
Closed JTAG connector P5 connects to
the +5V supply.
Open
Optional higher voltage
unregulated power supply is left
unconnected; connector P1 is
not used.
JU5
Closed
Enable optional unregulated
power supply from P1 to
connectors P3 and P4.
Jumper Tables
1-Wire is a registered trademark of Maxim Integrated Products, Inc.
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Connector P3
Connector P3 is a 20-pin, dual-row header that con-
nects to SMBus/I2C-based kits. The pinout is compati-
ble with Maxim’s previous SMBus/I2C solution, the
MAXSMBus board. See Table 1.
If designing a custom EV kit board, beware: the
ground return system does not connect pin 20.
Connector P4
Connector P4 is a 40-pin, dual-row header that con-
nects to SPI and 8-bit parallel kits. The pinout is com-
patible with Maxim’s previous SPI solution, the
68HC16MODULE board. See Table 2.
GPIO pins K1–K8 and K1’–K15’ must be driven with a
4.7kΩor lower impedance source to turn around the
bidirectional level translators.
Table 1. Connector P3 Description
*
This +12V signal is provided only for legacy systems and is normally unpowered.
*
This +12V signal is provided only for legacy systems and is normally unpowered.
P3 PIN LABEL FUNCTION
1 VDD Power Supply. 2.5V, 3.3V, or 5V selected by CMAXQUSB VDD select jumper.
2, 4, 5, 6, 8, 10,
12, 14, 16, 18, 19 GND Ground Return
3 SDA SMBus/I2C SDA (Data)
7 SCL SMBus/I2C SCL (Clock)
9 K6 General-Purpose I/O Designated as K6. Can be used for SMBus SUSPEND output.
11 K1 General-Purpose I/O Designated as K1. Can be used for SMBus ALERT input.
13 K2 General-Purpose I/O Designated as K2
15 K3 General-Purpose I/O Designated as K3
17 K4 General-Purpose I/O Designated as K4
20 +12V*
Optional Unregulated Higher Voltage (7.5V to 16.5V) Power Supply. Enabled only if CMAXQUSB
jumper JU5 is installed and closed, and if external power is applied through connector P1.
Table 2. Connector P4 Description
P4 PIN LABEL GPIO DESIGNATOR FUNCTION
1–4 GND — Ground Return
5, 6 +12V* —
Optional Unregulated Higher Voltage (7.5V to 16.5V) Power Supply.
Enabled only if CMAXQUSB jumper JU5 is closed, and if external power
is applied through connector P1.
7, 8 VDD — Power Supply. 2.5V, 3.3V, or 5V selected by CMAXQUSB VDD select
jumper.
9RD K13 when K0 = 1 Active-Low Read Strobe
10 WR K14 when K0 = 1 Active-Low Write Strobe
11 CS0 K15 when K0 = 1 Active-Low Memory Chip-Select Strobe
12, 13, 14 — — No Connection. Reserved for additional memory chip-select strobes.
15 A0 K9 when K0 = 1 Memory Address LSB
16 A1 K10 when K0 = 1 Memory Address
17 A2 K11 when K0 = 1 Memory Address
18 A3 K12 when K0 = 1 Memory Address MSB
19 D0 K1 when K0 = 1 Memory Data LSB
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Connector P5: JTAG Debug/Programming
Interface
Connector P5 is used during factory test to program the
firmware into the MAXQ2000. This connector pinout is
identical to the MAXQ2000 EV kit, MAXQ2000-KIT. See
Table 3.
Connector P6: Maxim 1-Wire Interface
Although there are currently no mating EV kits that use
this feature, the MAXQ2000’s 1-Wire interface signal
connects to header P6. See Table 4.
Table 2. Connector P4 Description (continued)
P4 PIN LABEL GPIO DESIGNATOR FUNCTION
20 D1 K2 when K0 = 1 Memory Data
21 D2 K3 when K0 = 1 Memory Data
22 D3 K4 when K0 = 1 Memory Data
23 D4 K5 when K0 = 1 Memory Data
24 D5 K6 when K0 = 1 Memory Data
25 D6 K7 when K0 = 1 Memory Data
26 D7 K8 when K0 = 1 Memory Data MSB
27 K1 K1 General-Purpose I/O
28 K2 K2 General-Purpose I/O
29 K3 K3 General-Purpose I/O
30 K4 K4 General-Purpose I/O
31 K5 K5 General-Purpose I/O
32 K6 K6 General-Purpose I/O
33 K7 K7 General-Purpose I/O
34 K8 K8 General-Purpose I/O
35 MISO K11 SPI Master-In, Slave-Out (MISO) Data
36 MOSI K12 SPI Master-Out, Slave-In (MOSI) Data
37 SCLK K10 SPI Clock
38 CS K9 SPI Chip Select. Configurable active high or active low.
39 OW K15 General-Purpose I/O, Maxim 1-Wire Bus
40 — — No Connection
*
This +12V signal is provided only for legacy systems and is normally unpowered.
P5 PIN LABEL FUNCTION
1 TCK TCK to MAXQ2000 Test Access Port (P4.0)
2, 10 GND Ground Return
3 TDO TDO to MAXQ2000 Test Access Port (P4.3)
4 VDDIO MAXQ2000 VDDIO Power Supply
5 TMS TMS to MAXQ2000 Test Access Port (P4.2)
6 RESET Active-High Reset to MAXQ2000
7 KEY No Connection. Pin is physically removed.
8 +5V Optional +5V Connection
9 TDI TDI from MAXQ2000 Test Access Port
Table 3. Connector P5 Description
P6 PIN LABEL FUNCTION
1 VDD VDD Power Supply
2 OW
Maxim 1-Wire Interface, Through Level
Translator U6
3 GND Ground Return
Table 4. Connector P6 Description
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CMAXQUSB User’s Guide
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Connector P7: SMBus/I2C Test Points
For convenience, the SMBus/I2C interface signals are
connected to labeled pins on header P7. See Table 5.
Connector P8: SPI Test Points
For convenience, the SPI interface signals are connect-
ed to labeled pins on header P8. See Table 6.
Detailed Description of Firmware
The CMAXQUSB firmware was developed using
the MAX-IDE assembly language development
environment. Full source code is available at
www.maxim-ic.com/tools/evkit under the project
name
CMAXQUSB Firmware
.
If designing a custom EV kit board requiring an inter-
rupt service routine in custom firmware, GPIO signals
K5–K8 are the suggested locations for the interrupt sig-
nal. The standard CMAXQUSB firmware does not ser-
vice interrupts on any GPIO pins.
Troubleshooting
Problem: Software reports it cannot find the board.
• Verify that the CMAXQUSB power LED is lit.
• Verify that the USB cable is connected.
• Verify that Windows plug-and-play detected the
board. Bring up Control Panel -> System -> Device
Manager, and look at what device nodes are indicat-
ed for the USB. If there is an “unknown device” node
attached to the USB, delete it—this forces plug-and-
play to try again.
Problem: Unable to find SMBus/I2C device.
• Verify that the SCL and SDA signals are pulled up to
VDD. CMAXQUSB DIP switch SW1 enables the on-
board resistors. There must be pullup resistors
somewhere on the bus.
• If using wires to connect the CMAXQUSB to your
target board, make certain that you have not
swapped the SCL and SDA signals. Verify that the
ground return is connected.
P7 PIN LABEL FUNCTION
1 VDD VDD Power Supply
2 SDA SMBus/I2C SDA (Data)
3 GND Ground Return
4 SCL SMBus/I2C SCL (Clock)
Table 5. Connector P7 Description
P8 PIN LABEL FUNCTION
1 VDD VDD Power Supply
2 MISO Master-In, Slave-Out Data
3 MOSI Master-Out, Slave-In Data
4 SCLK SPI Clock
5CS
Chip Select. Configurable active
high or active low.
6 GND Ground Return
Table 6. Connector P8 Description
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U1P13 1
49 VDD
U1P14 2SEG11/P1.3
SEG7/P0.7/INT3 65 U1P07
SEG8/P1.0 66 U1P10
SEG9/P1.1 67 U1P11
SEG10/P1.2 68 U1P12
SEG6/P0.6/INT2 64 U1P06
SEG5/P0.5/INT1 63 U1P05
SEG4/P0.4/INT0 62 U1P04
SEG3/P0.3 61 U1P03
SEG2/P0.2 60 U1P02
SEG1/P0.1 59 U1P01
SEG0/P0.0 58 U1P00
VADJ 57 VDDIO
VDDIO
VLCD2 56
VLCD1 55
SEG28/P3.4/INT4
18
SEG29/P3.5/INT5
19
SEG30/P3.6/INT6
20
SEG31/P3.7/INT7
21
SEG32
22
SEG33/COM3
23
SEG34/COM2
24
SEG35/COM1
25
COM0
26
VLCD 54
P7.1/RXO/INT15 53 U1P71
P7.0/TXO/INT14 52 U1P70
U1P64
U1P63
46
47
P6.4/TOB/WKOUT
U1P65
48
P6.5/TO/WKOUT
P6.3/T2/OW_IN
U1P62
U1P61
44
45
P6.2/T2B/OW_OUT
P6.1/T1/INT13
U1P60
43
P6.0/T1B/INT12
U1P57
U1P56
40
41
P5.7/MISO
P5.6/SCLK
U1P55
U1P54
38
39
P5.5/MOSI
P5.4/SS
U1P53
U1P52
Y3
32.768kHz
OPEN
36
34
35
37
P5.3/TX1/INT11
P5.2/RX1/INT10
32KIN
32KOUT
U1P40
U1P41
U1P42
U1P43
RESET
Y1
16MHz
51
50
HFXIN
VDDIO
HFXOUT
U1P15 3SEG12/P1.4
U1P16 4SEG13/P1.5
U1P17 5SEG14/P1.6
U1P20 6SEG15/P1.7
U1P21 7
SEG16/P2.0
U1P22 8SEG17/P2.1
U1P23 9SEG18/P2.2
U1P24 10 SEG19/P2.3
U1P25 11
SEG20/P2.4
U1P26 12
SEG21/P2.5
13 SEG22/P2.6
14
SEG23/P2.7
15 SEG24/P3.0
16
28
42
SEG25/P3.1
17 SEG26/P3.2
SEG27/P3.3
33 RESET
32 P4.3/TDO
31 P4.2/TMS
30 P4.1/TDI/INT9
29 P4.0/TCK/INT8
GND
GND
+2.5V
27
VDDIO
C9
10pF
C8
10pF
VDDIO
C24
0.1µF
+2.5
C23
0.1µF
U1
(EXPOSED PAD CONNECTS TO GND)
MAXQ2000-RAX
Figure 1a. CMAXQUSB Schematic (Sheet 1 of 4)
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CMAXQUSB User’s Guide
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USBVCC 4
U1P71
25
6
30 3 26 13
8
7
5
TXD
U1P70
24
RXD
U1P52
23
RTS
U1P65
22
CTS
U1P53
21
DTR
U1P64
20
DSR
19
DCD 18
RI 16
TXDEN 12
TXLED 11
RXLED
15
PWREN 10
SLEEP
14
PWRCTL
EEDATA 2
32
1
VDDIO
C15
0.1µF
C12
0.1µF
R7
470Ω
R12
27Ω
R13
27ΩR2
1.5kΩ
C5
0.033µF
C14
0.1µF
C13
0.1µF
R14
10kΩ
R1
2.2kΩ
USBVCC
RESET
USBDM
USBDP
RSTOUT
3V3OUT
27
31
C6
22pF XTIN
28
C7
22pF
Y2
6MHz
C16
0.1µF
XTOUT
EECS
EESK
AVVC VCC VCC VCCIO
EEDATA
TEST
2CLK
6
7
VCC
NC
NC
EEDATA 3DI
1CS
4D0
8USBVCC
U4
93C46
U2
FT232BM
P2-3
P2-2
P2-1
P2
USB SERIES B
P2-4
MAX8511
U11
+5V
C17
1µF
+3.3V
C2
22µF
5
2
1
3
OUT
GND
IN
SHDN
U3
MAX8511
+5V
C18
1µF
+2.5V VDDIO
C19
1µF
5
2
1
3
OUT
GND
IN
SHDN
GND
17
GND
9
AGND
29
GND
5
R19
100kΩ
R18
4.7kΩ
+5V
C4
4.7µF
7
6
5
43
1
2
8
OUT
OUT
GND
ON/OFF
SET
IN
IN
FAULT
C3
22µF
J3
SW1
J2
VDDIO
C10
0.1µF
C11
0.1µF
VDDIO
VDD
U9
MAX3373
P3-3 P3-7I/OVCC2 I/OVCC1
VCC
TRI-STATE
U1P61 U1P60
GND
VL
I/OVL2 I/OVL1
1
2
45
6
7
8
12
43
3
JU3
VDD
R6
1.5kΩ
R5
1.5kΩ
MAX890
Figure 1b. CMAXQUSB Schematic (Sheet 2 of 4)
Evaluates: SPI and SMBus/I2C-Compatible Parts
CMAXQUSB User’s Guide
10
U1P26 3
2VL
U1P25 4
U1P63
U1P62 1I/OVL1
P4-10
P4-9
16
17
I/OVCC3
P4-11
18
I/OVCC2
P4-39
20
I/OVCC1
I/OVCC4
P4-18
P4-17
14
15
I/OVCC5
I/OVCC6
P4-16
13
I/OVCC7
P4-15
12
I/OVCC8
11
GND
VCC
U1P24 5
U1P23 6
U1P22 7
U1P21 8
U1P20 9
VDDIO
10 EN
VDDIO
19
VDD
JU2
VDDIO
C26
0.1µF
VDD
C31
0.1µF
VDDIO
C32
0.1µF
VDD
1
23
P6
R8
470Ω
R9
470Ω
R10
470Ω
R11
470Ω
VDDIO
LED1
LED
RED
VDDIO
LED2
LED
RED
U1P00
VDDIO
LED3
LED
YELLOW
U1P01
VDDIO
LED4
LED
GREEN
U1P02
U1P16 3
2VL
U1P15 4I/OVL2
U1P17 1I/OVL1
P4-24
P4-23
16
17
I/OVCC3
P4-25
18
I/OVCC2
P4-26
20
I/OVCC1
I/OVCC4
P4-22
P4-21
14
15
I/OVCC5
I/OVCC6
P4-20
13
I/OVCC7
P4-19
12
I/OVCC8
11
GND
VCC
U1P14 5I/OVL3
U1P13 6I/OVL4
U1P12 7I/OVL5
U1P11 8I/OVL6
U1P10 9
I/OVL7
I/OVL8
I/OVL2
I/OVL3
I/OVL4
I/OVL5
I/OVL6
I/OVL7
I/OVL8
VDDIO
10 EN
VDDIO
19
VDD
VDDIO
C27
0.1µF
MAX3001
U7
U1P57 2
1VL
U1P56 3OVL1
P4-37
P4-36
11
12
OVCC2
P4-35
13
IVCC1
OVCC3
P4-38
9
10
OVCC4
N.C.
8
TRI-STATE
VCC
U1P55 4IVL2
U1P54 5IVL3
6IVL4
N.C.
VDDIO
7GND VDDIO
14
VDD
U10
MAX3390
U1P06 3
2VL
U1P05 4I/OVL2
U1P17 1I/OVL1
P4-32
P4-31
16
17
I/OVCC3
P4-33
18
I/OVCC2
P4-34
20
I/OVCC1
I/OVCC4
P4-30
P4-29
14
15
I/OVCC5
I/OVCC6
P4-28
13
I/OVCC7
P4-27
12
I/OVCC8
11
GND
VCC
U1P04 5I/OVL3
U1P03 6I/OVL4
U1P02 7I/OVL5
U1P01 8I/OVL6
U1P00 9
I/OVL7
I/OVL8
VDDIO
10 EN
VDDIO
19
VDD
VDDIO
C30
0.1µF
VDD
C22
1µF
C29
0.1µF
VDD
C21
1µF
C28
0.1µF
VDD
C20
1µF
C25
0.1µF
MAX3001
U8
MAX3001
U6
Figure 1c. CMAXQUSB Schematic (Sheet 3 of 4)
Evaluates: SPI and SMBus/I2C-Compatible Parts
CMAXQUSB User’s Guide
11
JU5
JU4
VDD P3
2 x 10 HEADER
+12V
+
-
-
-
C1
22µFP1
OPEN
P3-3 P3-3
P3-7 P3-7
P4-32 P3-9
P4-27 P3-11
P4-28 P3-13
P4-29 P3-15
P4-30 P3-17
P3-5
P3-19
P3-1
+12V
P3-20
P3-2
P3-4
P3-6
P3-8
P3-10
P3-12
P3-14
P3-16
P3-18
VDD P8
1 x 6 HEADER
P4-35 P8-2
P4-36 P8-3
P4-37 P8-4
P4-38 P8-5
P8-6
P8-1
VDD P7
1 x 4 HEADER
P3-3 P7-2
P3-7 P7-4
P7-3
P7-1
P5
2 x 5 HEADER
U1P42 P5-5
U1P43 P5-3
U1P40 P5-1
U1P41 P5-9
P5-7
VDDIO
P5-2
P5-4
P5-8
P5-10
P5-6 RESET +5V
+12V
P4
2 x 20 HEADER
P4-9 P4-9
P4-11 P4-11
P4-13
P4-15 P4-15
P4-17 P4-17
P4-19 P4-19
P4-21 P4-21
P4-23 P4-23
P4-25 P4-25
P4-27 P4-27
P4-29 P4-29
P4-31 P4-31
P4-33 P4-33
P4-35 P4-35
P4-37 P4-37
P4-39 P4-39
P4-16
P4-18
P4-20
P4-22
P4-24
P4-26
P4-28
P4-30
P4-32
P4-34
P4-36
P4-38
P4-40
P4-14
P4-12
P4-16
P4-10 P4-10
P4-18
P4-20
P4-22
P4-24
P4-26
P4-28
P4-30
P4-32
P4-34
P4-36
P4-38
P4-3
P4-1
P4-5
VDD
P4-7
+12V
P4-4
P4-2
P4-6
VDD
P4-8
VDD JU1
2 x 3 HEADER
JU1-1
+5V
JU1-2
+3.3V
JU1-3
VDD
JU1-4
VDD
JU1-5
+2.5V
JU1-6
D1
BRIDGE/DF005M
3
1
6
4
1
3
2
Figure 1d. CMAXQUSB Schematic (Sheet 4 of 4)
Evaluates: SPI and SMBus/I2C-Compatible Parts
CMAXQUSB User’s Guide
12
Figure 2. CMAXQUSB Component Placement Guide—Component Side (Top Silkscreen)
Evaluates: SPI and SMBus/I2C-Compatible Parts
CMAXQUSB User’s Guide
13
Figure 3. CMAXQUSB Component Placement Guide—Solder Side (Bottom Silkscreen)
Evaluates: SPI and SMBus/I2C-Compatible Parts
CMAXQUSB User’s Guide
14
Figure 4. CMAXQUSB PCB Layout—Component Side
Evaluates: SPI and SMBus/I2C-Compatible Parts
CMAXQUSB User’s Guide
15
Figure 5. CMAXQUSB PCB Layout—Solder Side
Evaluates: SPI and SMBus/I2C-Compatible Parts
CMAXQUSB User’s Guide
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. The parametric values (min and max limits) shown in
the Electrical Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance.
16
_______________Maxim Integrated Products, Inc. 160 Rio Robles, San Jose, CA 95134 USA 1-408-601-1000
© 2012 Maxim Integrated Products Maxim is a registered trademark of Maxim Integrated Products, Inc.
Revision History
REVISION
NUMBER
REVISION
DATE DESCRIPTION PAGES
CHANGED
2 12/10 Updated Y3 in Component List and Figure 1a 2, 8
