2010-2011 Microchip Technology Inc. DS39996F-page 1
PIC24FJ128GA310 FAMILY
Extreme Low-Power Features:
• Multiple Power Management Options for Extreme
Power Reduction:
-VBAT allows the device to transition to a back-up
battery for the lowest power consumption with
RTCC
- Deep Sleep allows near total power-down, with
the ability to wake-up on external triggers
- Sleep and Idle modes selectively shut down
peripherals and/or core for substantial power
reduction and fast wake-up
- Doze mode allows CPU to run at a lower clock
speed than peripherals
• Alternate Clock modes Allow On-the-Fly Switching to
a Lower Clock Speed for Selective Power Reduction
• Extreme Low-Power Current Consumption for
Deep Sleep:
- WDT: 270 nA @ 3.3V typical
- RTCC: 400 nA @ 32 kHz, 3.3V typical
- Deep Sleep current, 40 na, 3.3V typical
Peripheral Feat ures:
• LCD Display Controller:
- Up to 60 segments by 8 commons
- Internal charge pump and low-power, internal
resistor biasing
- Operation in Sleep mode
• Up to Five External Interrupt Sources
• Peripheral Pin Select (PPS): Allows Independent I/O
Mapping of Many Peripherals
• Five 16-Bit Timers/Counters with Prescaler:
- Can be paired as 32-bit timers/counters
• Six-Channel DMA supports All Peripheral modules
- Minimizes CPU overhead and increases data
throughput
Peripheral Features (continued):
• Seven Input Capture modules, each with a
Dedicated 16-Bit Timer
• Seven Output Compare/PWM modules, each with a
Dedicated 16-Bit Timer
• Enhanced Parallel Master/Slave Port (EPMP/EPSP)
• Hardware Real-Time Clock/Calendar (RTCC):
- Runs in Deep Sleep and VBAT modes
• Two 3-Wire/4-Wire SPI modules (support 4 Frame
modes) with 8-Level FIFO Buffer
•Two I
2C™ modules Support Multi-Master/Slave
mode and 7-Bit/10-Bit Addressing
•Four UART modules:
- Support RS-485, RS-232 and LIN/J2602
- On-chip hardware encoder/decoder for IrDA®
- Auto-wake-up on Auto-Baud Detect
- 4-level deep FIFO buffer
• Programmable 32-bit Cyclic Redundancy Check
(CRC) Generator
• Digital Signal Modulator Providers On-Chip FSK and
PSK Modulation for a Digital Signal Stream
• Configurable Open-Drain Outputs on Digital I/O Pins
• High-Current Sink/Source (18 mA/18 mA) on All I/O Pins
Analog Features:
• 10/12-Bit, 24-Channel Analog-to-Digital (A/D) Converter:
- Conversion rate of 500 ksps (10-bit), 200 ksps (12-bit)
- Conversion available during Sleep and Idle
• Three Rail-to-Rail Enhanced Analog Comparators
with Programmable Input/Output Configuration
• On-Chip Programmable Voltage Reference
• Charge Time Measurement Unit (CTMU):
- Used for capacitive touch sensing, up to 24 channels
- Time measurement down to 1 ns resolution
- CTMU temperature sensing
Device
Pins
Memory Remappable Peripherals
I2C™
10/12-Bit A/D
(ch)
Comparators
CTMU (ch)
EPMP/EPSP
LCD (pixels)
JTAG
Deep Sleep w/VBAT
Flash
Program
(bytes)
Data SRAM
(bytes)
16-Bit Timers
Capt ur e Input
Compare/PWM
Output
UART w/IrD A
®
SPI
PIC24FJ128GA310 100 128K 8K 5 7 7 4 2 2 24 3 24 Y 480 Y Y
PIC24FJ128GA308 80 128K 8K 5 7 7 4 2 2 16 3 16 Y 368 Y Y
PIC24FJ128GA306 64 128K 8K 5 7 7 4 2 2 16 3 16 Y 240 Y Y
PIC24FJ64GA310 100 64K 8K 5 7 7 4 2 2 24 3 24 Y 480 Y Y
PIC24FJ64GA308 80 64K 8K 5 7 7 4 2 2 16 3 16 Y 368 Y Y
PIC24FJ64GA306 64 64K 8K 5 7 7 4 2 2 16 3 16 Y 240 Y Y
64/80/100-Pin, General Purpose, 16-Bit Flash Micr ocontrollers
with LCD Controller and nanoWatt XLP Technology
PIC24FJ128GA310 FAMILY
DS39996F-page 2 2010-2011 Microchip Technology Inc.
High-Performance CPU:
• Modified Harvard Architecture
• Up to 16 MIPS Operation @ 32 MHz
• 8 MHz Internal Oscillator:
- 4x PLL option
- Multiple clock divide options
- Fast start-up
• 17-Bit x 17-Bit Single-Cycle Hardware
Fractional/Integer Multiplier
• 32-Bit by 16-Bit Hardware Divider
• 16 x 16-Bit Working Register Array
• C Compiler Optimized Instruction Set Architecture
• Two Address Generation Units for Separate Read
and Write Addressing of Data Memory
S pecial Microcontroller Features:
• Operating Voltage Range of 2.0V to 3.6V
• Two On-Chip Voltage Regulators (1.8V and 1.2V) for
Regular and Extreme Low-Power Operation
• 20,000 Erase/Write Cycle Endurance Flash Program
Memory, typical
• Flash Data Retention: 20 Years Minimum
• Self-Programmable under Software Control
• Programmable Reference Clock Output
• In-Circuit Serial Programming™ (ICSP™) and
In-Circuit Emulation (ICE) via 2 Pins
• JTAG Boundary Scan Support
• Fail-Safe Clock Monitor Operation:
- Detects clock failure and switches to on-chip,
low-power RC oscillator
• Power-on Reset (POR), Power-up Timer (PWRT)
and Oscillator Start-up Timer (OST)
• Brown-out Reset (BOR) with Operation below VBOR
• Low-Voltage Detect (LVD)
• Flexible Watchdog Timer (WDT) with its own
RC Oscillator for Reliable Operation
• Standard and Ultra Low-Power Watchdog Timers
(WDT) for Reliable Operation in Standard and Deep
Sleep modes
2010-2011 Microchip Technology Inc. DS39996F-page 3
PIC24FJ128GA310 FAMILY
Pin Diagrams
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
48
47
22
44
24
25
26
27
28
29
30
31
32
PIC24FJXXXGA306
1
46
45
23
43
42
41
40
39
C3INB/SEG25/CN15/RD6
RP20
/SEG24/PMRD/CN14/RD5
RP25
/SEG23/PMWR/CN13/RD4
RP22
/SEG22/PMBE0/CN52/RD3
RP23
/SEG21/PMACK1/CN51/RD2
RP24
/SEG20/CN50/RD1
LVDIN/CTED8/PMD4/CN62/RE4
COM0/CTED9/PMD3/CN61/RE3
COM1/PMD2/CN60/RE2
COM2/PMD1/CN59/RE1
SEG27/CN68/RF0
V
CAP
/V
DDCORE
SOSCI/RC13
RP11
/SEG17/CN49/RD0
RP3
/SEG15/PMA15/C3IND/CS2/CN55/RD10
RP4
/SEG14/PMACK2/CN54/RD9
RP2
/SEG13/RTCC/CN53/RD8
RP12
/C3INC/SEG16/PMA14/CS1/CN56/RD11
OSCO/CLKO/CN22/RC15
OSCI/CLKI/CN23/RC12
V
DD
SEG28/CN72/SCL1/RG2
INT0/CN84/RF6
RP30
/CN70/RF2
RP16
/SEG12/CN71/RF3
SEG47/CN73/SDA1/RG3
SOSCO/
RPI37
/SCKLI/RC14
AV
DD
AN8/
RP8
/SEG31/COM7/CN26/RB8
AN9/
RP9
/SEG30/COM6/T1CK/PMA7/CN27/RB9
TMS/CV
REF
/AN10/SEG29/COM5/PMA13/CN28/RB10
TDO/AN11/PMA12/CN29/RB11
V
DD
PGEC2/AN6/
RP6
/LCDBIAS3/CN24/RB6
PGED2/AN7/
RP7
/CN25/RB7
PMA8/
RP17
/SCL2/SEG11/CN18/RF5
RP10
/SDA2/SEG10/PMA9/CN17/RF4
PMD5/CTED4/LCDBIAS2/CN63/RE5
PMD6/LCDBIAS1/CN64/RE6
PMD7/LCDBIAS0/CN65/RE7
C1IND/
RP21
/SEG0/PMA5/CN8/RG6
V
DD
PGEC3/AN5/C1INA/
RP18
/SEG2/CN7/RB5
PGED3/AN4/C1INB/
RP28
/SEG3/CN6/RB4
AN3/C2INA/SEG4/CN5/RB3
AN2/C2INB/CTCMP/CTED13/
RP13
/SEG5/CN4/RB2
V
LCAP
1/C1INC/
RP26
/PMA4/CN9/RG7
V
LCAP
2/C2IND/
RP19
/PMA3/CN10/RG8
PGEC1/CV
REF
-/AN1/
RP1
/SEG6/CTED12/CN3/RB1
PGED1/CV
REF
+/AN0/
RP0
/SEG7/PMA6/CN2/RB0
C2INC/
RP27
/SEG1/PMA2/CN11/RG9
MCLR
TCK/AN12/CTED2/PMA11/SEG18/CN30/RB12
TDI/AN13/SEG19/CTED1/PMA10/CN31/RB13
AN14/
RP14
/SEG8/CTED5/CTPLS/PMA1/CN32/RB14
AN15/
RP29
/SEG9/CTED6/REFO/PMA0/CN12/RB15
COM3/PMD0/CN58/RE0
COM4/SEG48/CN69/RF1
C3INA/SEG26/CN16/RD7
V
SS
V
SS
V
SS
V
BAT
63
62
61
59
60
58
57
56
54
55
53
52
51
49
50
38
37
34
36
35
33
17
19
20
21
18
AV
SS
64
64-Pin TQFP, QFN
Legend: RPn and RPIn represent remappable pins for Peripheral Pin Select feature. Shaded pins indicate pins that are tolerant up to +5.5V.
Note: Pinouts are subject to change.
PIC24FJ128GA310 FAMILY
DS39996F-page 4 2010-2011 Microchip Technology Inc.
Pin Diagrams (continued)
80
79
78
20
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
60
59
26
56
40
39
28
29
30
31
32
33
34
35
36
37
38
PIC24FJXXXGA308
17
18
19
1
76
77
58
57
27
55
54
53
52
51
RP20
/SEG24/PMRD/CN14/RD5
RP25
/SEG23/PMWR/CN13/RD4
SEG45/PMD13/CN19/RD13
RPI42
/SEG44/PMD12/CN57/RD12
RP22
/SEG22/PMBE0/CN52/RD3
RP23
/SEG21/PMACK1/CN51/RD2
RP24
/SEG20/CN50/RD1
COM1/PMD2/CN60/RE2
COM2/PMD1/CN59/RE1
COM3/PMD0/CN58/RE0
SEG50/PMD8/CN77/RG0
LVDIN/CTED8/PMD4/CN62/RE4
CTED9/COM0/PMD3/CN61/RE3
SEG27/PMD11/CN68/RF0
V
CAP
/V
DDCORE
SOSCI/RC13
RP11
/SEG17/CN49/RD0
RP3
/SEG15/C3IND/PMA15/CS2/CN55/RD10
RP4
/SEG14/PMACK2/CN54/RD9
RP2
/SEG13/RTCC/CN53/RD8
RP12
/C3INC/SEG16/PMA14/CS1/CN56/RD11
RPI35
/SEG43/PMBE1/CN44/RA15
RPI36
/SEG42/PMA22/CN43/RA14
OSCO/CLKO/CN22/RC15
OSCI/CLKI/CN23/RC12
V
DD
SEG28/SCL1/CN72/RG2
INT0/CN84/RF6
CN83/RF7
RP15
/SEG41/CN74/RF8
SEG47/SDA1/CN73/RG3
RP30
/SEG40/CN70/RF2
RP16
/SEG12/CN71/RF3
RPI37
/SOSCO/SCKLI/RC14
V
REF
+/SEG37/PMA6/CN42/RA10
V
REF
-/SEG36/PMA7/CN41/RA9
AV
DD
AN8/
RP8
/SEG31/COM7/CN26/RB8
AN9/
RP9/
SEG30/COM6/T1CK/CN27/RB9
CV
REF
/AN10/SEG29/COM5/PMA13/CN28/RB10
AN11/PMA12/CN29/RB11
V
DD
RPI43
/SEG38/CN20/RD14
RP5
/SEG39/CN21/RD15
PGEC2/AN6/
RP6
/LCDBIAS3/CN24/RB6
PGED2/AN7/
RP7
/CN25/RB7
RP17
/SEG11/SCL2/PMA8/CN18/RF5
RP10
/SEG10/SDA2/PMA9/CN17/RF4
PMD5/CTED4/LCDBIAS2/CN63/RE5
PMD6/LCDBIAS1/CN64/RE6
PMD7/LCDBIAS0/CN65/RE7
RPI38
/SEG32/CN45/RC1
RPI40
/SEG33/CN47/RC3
C1IND/
RP21
/SEG0/PMA5/CN8/RG6
V
DD
TMS/
RPI33
/SEG34/PMCS1/CN66/RE8
TDO/
RPI34
/SEG35/PMA19/CN67/RE9
AN3/C2INA/SEG4/CN5/RB3
AN2/C2INB/
RP13
/CTCMP/SEG5/CTED13/CN4/RB2
V
LCAP
1/C1INC/
RP26
/PMA4/CN9/RG7
V
LCAP
2/C2IND/
RP19
/PMA3/CN10/RG8
PGEC1/CV
REF
-/AN1/
RP1
/SEG6/CTED12/CN3/RB1
PGED1/CV
REF
+/AN0/
RP0
/SEG7/CN2/RB0
C2INC/
RP27/
SEG1/PMA2/CN11/RG9
MCLR
TCK/AN12/CTED2/SEG18/PMA11/CN30/RB12
TDI/AN13/CTED1/SEG19/PMA10/CN31/RB13
AN14/
RP14
/SEG8/CTPLS/CTED5/PMA1/CN32/RB14
AN15/
RP29
/SEG9/CTED6/REFO/PMA0/CN12/RB15
SEG46/PMD9/CN78/RG1
COM4/SEG48/PMD10/CN69/RF1
C3INA/SEG26/PMD15/CN16/RD7
C3INB/SEG25/PMD14/CN15/RD6
V
SS
Vss
V
SS
V
BAT
75
74
73
71
72
70
69
68
66
67
65
64
63
61
62
50
49
46
48
47
45
44
43
42
41
21
23
24
25
22
AV
SS
PGEC3/AN5/C1INA/
RP18
/SEG2/CN7/RB5
PGED3/AN4/C1INB/
RP28
/SEG3/CN6/RB4
80-Pin TQFP
Legend: RPn and RPIn represent remappable pins for Peripheral Pin Select feature. Shaded pins indicate pins that are tolerant up to +5.5V.
Note: Pinouts are subject to change.
2010-2011 Microchip Technology Inc. DS39996F-page 5
PIC24FJ128GA310 FAMILY
Pin Diagrams (continued)
92
94
93
91
90
89
88
87
86
85
84
83
82
81
80
79
78
20
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
65
64
63
62
61
60
59
26
56
45
44
43
42
41
40
39
28
29
30
31
32
33
34
35
36
37
38
PIC24FJXXXGA310
17
18
19
21
22
95
1
76
77
72
71
70
69
68
67
66
75
74
73
58
57
24
23
25
96
98
97
99
27
46
47
48
49
50
55
54
53
52
51
100
RP20
/SEG24/PMRD/CN14/RD5
RP25
/SEG23/PMWR/CN13/RD4
SEG45/PMD13/CN19/RD13
RPI42
/SEG44/PMD12/CN57/RD12
RP22
/SEG22/PMBE0/CN52/RD3
RP23
/SEG21/PMACK1/CN51/RD2
RP24
/SEG20/CN50/RD1
AN22/SEG59/PMA17/CN40/RA7
AN23/SEG58/CN39/RA6
COM1/PMD2/CN60/RE2
SEG62/CTED10/CN80/RG13
SEG61/CN79/RG12
SEG60/PMA16/CTED11/CN81/RG14
COM2/PMD1/CN59/RE1
COM3/PMD0/CN58/RE0
SEG50/PMD8/CN77/RG0
SEG63/PMD4/LVDIN/CTED8/CN62/RE4
COM0/PMD3/CTED9/CN61/RE3
SEG27/PMD11/CN68/RF0
V
CAP
/V
DDCORE
SOSCI/RC13
RP11
/SEG17/CN49/RD0
RP3
/SEG15/C3IND/PMA15/CS2/CN55/RD10
RP4
/SEG14/PMACK2/CN54/RD9
RP2
/SEG13/RTCC/CN53/RD8
RP12
/SEG16/C3INC/PMA14/CS1/CN56/RD11
RPI35
/SEG43/PMBE1/CN44/RA15
RPI36
/SEG42/PMA22/CN43/RA14
OSCO/CLKO/CN22/RC15
OSCI/CLKI/CN23/RC12
V
DD
SCL1/SEG28/CN72/RG2
INT0/CN84/RF6
CN83/RF7
RP15
/SEG41/CN74/RF8
SDA1/SEG47/CN73/RG3
RP30
/SEG40/CN70/RF2
RP16
/SEG12/CN71/RF3
V
SS
RPI37
/SOSCO/SCLKI/RC14
V
REF
+/SEG37/PMA6/CN42/RA10
V
REF
-/SEG36/PMA7/CN41/RA9
AV
DD
AV
SS
AN8/
RP8
/SEG31/COM7/CN26/RB8
AN9/
RP9
/SEG30/T1CK/COM6/CN27/RB9
CV
REF
/AN10/SEG29/COM5/PMA13/CN28/RB10
AN11/PMA12/CN29/RB11
V
DD
RPI32
/SEG55/CTED7/PMA18/CN75/RF12
RP31
/SEG54/CN76/RF13
V
SS
V
DD
RP5
/SEG39/CN21/RD15
RPI43
/SEG38/CN20/RD14
PGEC2/AN6/
RP6
/LCDBIAS3/CN24/RB6
PGED2/AN7/
RP7
/CN25/RB7
RP17
/SEG11/PMA8/CN18/RF5
RP10
/SEG10/PMA9/CN17/RF4
CTED4/PMD5/LCDBIAS2/CN63/RE5
PMD6/LCDBIAS1/CN64/RE6
PMD7/LCDBIAS0/CN65/RE7
RPI38
/SEG32/CN45/RC1
RPI39
/SEG52/CN46/RC2
RPI40
/SEG33/CN47/RC3
AN16/
RPI41
/SEG53/PMCS2/CN48/RC4
AN17/C1IND/
RP21
/SEG0/PMA5/CN8/RG6
V
DD
TMS/CTED0/SEG49/CN33/RA0
RPI33
/SEG34/PMCS1/CN66/RE8
AN21/
RPI34
/SEG35/PMA19/CN67/RE9
PGEC3/AN5/C1INA/
RP18
/SEG2/CN7/RB5
AN3/C2INA/SEG4/CN5/RB3
AN2/C2INB/
RP13
/SEG5/CTED13/CTCMP/CN4/RB2
V
LCAP
1/AN18/C1INC/
RP26
/PMA4/CN9/RG7
V
LCAP
2/AN19/C2IND/
RP19
/PMA3/CN10/RG8
PGEC1/CV
REF
-/AN1/
RP1
/SEG6/CTED12/CN3/RB1
PGED1/CV
REF
+/AN0/
RP0
/SEG7/CN2/RB0
SEG51/CTED3/CN82/RG15
V
DD
AN20/C2INC/
RP27
/SEG1/PMA2/CN11/RG9
MCLR
AN12/CTED2/SEG18/PMA11/CN30/RB12
AN13/CTED1/PMA10/SEG19/CN31/RB13
AN14/
RP14
/SEG8/CTPLS/CTED5/PMA1/CN32/RB14
AN15/
RP29
/SEG9/REFO/CTED6/PMA0/CN12/RB15
SEG46/PMD9/CN78/RG1
COM4/SEG48/PMD10/CN69/RF1
C3INA/SEG26/PMD15/CN16/RD7
C3INB/SEG25/PMD14/CN15/RD6
TDO/CN38/RA5
SDA2/SEG57/PMA20/CN36/RA3
SCL2/SEG56/CN35/RA2
V
SS
V
SS
V
SS
V
BAT
TDI/PMA21/CN37/RA4
TCK/CN34/RA1
PGED3/AN4/C1INB/
RP28
/SEG3/CN6/RB4
Legend: RPn and RPIn represent remappable pins for Peripheral Pin Select feature. Shaded pins indicate pins that are tolerant up to +5.5V.
Note: Pinouts are subject to change.
100-Pin TQFP
PIC24FJ128GA310 FAMILY
DS39996F-page 6 2010-2011 Microchip Technology Inc.
Pin Diagrams (continued)
1 3 5 7 8 9 10 11
ARE4 RE3 RE0 RG0 RF1 VBAT N/C RD12 RD1
BN/C RE2 RE1 RA7 RF0 VCAP/ RD5 RD3 VSS RC14
CRE6 VDD RG14 N/C RD7 RD4 N/C RC13 RD11
D
RE7 RE5 N/C N/C N/C RD6 RD13 RD0 N/C RD10
E
RC4 RG6 N/C RG1 N/C RA15 RD8 RA14
FMCLR RG8 RG9 RG7 VSS N/C N/C VDD OSCI/ VSS OSCO/
GRE8 RE9 RA0 N/C VDD VSS VSS N/C RA5 RA3 RA4
H
N/C N/C N/C VDD N/C RF6 RG2 RA2
JAVDD RB11 RA1 RB12 N/C N/C RF8 RG3
K
RA10 N/C RF12 RB14 VDD
L
RA9 AVSS RB10 RB13 RB15 RF4 RF5
24 6
RF7
RG13 RD2
RG15
RG12 RA6
RC1
RC3 RC2 RD9
RC12 RC15
RB4
RB3 RB2
RB8 RD15 RF3 RF2
RB9 RF13 RD14
RB5
RB1 RB0
RB6
RB7
VDDCORE
121-Pin BGA (Top View)
Legend: Shaded pins indicate pins that are tolerant up to +5.5V.
Note: See Ta b le 1 for complete pinout descriptions. Pinouts are subject to change.
2010-2011 Microchip Technology Inc. DS39996F-page 7
PIC24FJ128GA310 FAMILY
TABLE 1: COMPLETE PIN FUNCTION DESCRIPTIONS FOR 121-PIN DEVICES
PinFunctionPinFunction
A1 SEG63/PMD4/LVDIN/CTED8/CN62/RE4 E1 AN16/RPI41/SEG53/PMCS2/CN48/RC4
A2 COM0/PMD3/CTED9/CN61/RE3 E2 RPI40/SEG33/CN47/RC3
A3 SEG62/CTED10/CN80/RG13 E3 AN17/C1IND/RP21/SEG0/PMA5/CN8/RG6
A4 COM3/PMD0/CN58/RE0 E4 RPI39/SEG52/CN46/RC2
A5 SEG50/PMD8/CN77/RG0 E5 N/C
A6 SEG48/COM4/PMD10/CN69/RF1 E6 SEG46/PMD9/CN78/RG1
A7 VBAT E7 N/C
A8 N/C E8 RPI35/SEG43/PMBE1/CN44/RA15
A9 RPI42/SEG44/PMD12/CN57/RD12 E9 RP2/SEG13/RTCC/CN53/RD8
A10 RP23/SEG21/PMACK1/CN51/RD2 E10 RP4/SEG14/PMACK2/CN54/RD9
A11 RP24/SEG20/CN50/RD1 E11 RPI36/SEG42/PMA22/CN43/RA14
B1 N/C F1 MCLR
B2 SEG51/CTED3/CN82/RG15 F2 VLCAP2/AN19/C2IND/RP19/PMA3/CN10/RG8
B3 COM1/PMD2/CN60/RE2 F3 AN20/C2INC/RP27/SEG1/PMA2/CN11/RG9
B4 COM2/PMD1/CN59/RE1 F4 VLCAP1/AN18/C1INC/RP26/PMA4/CN9/RG7
B5 AN22/SEG59/PMA17/CN40/RA7 F5 VSS
B6 SEG27/PMD11/CN68/RF0 F6 N/C
B7 VCAP F7 N/C
B8 RP20/SEG24/PMRD/CN14/RD5 F8 VDD
B9 RP22/SEG22/PMBE0/CN52/RD3 F9 OSCI/CLKI/CN23/RC12
B10 VSS F10 VSS
B11 RPI37/SOSCO/SCLKI/RC14 F11 OSCO/CLKO/CN22/RC15
C1 PMD6/LCDBIAS1/CN64/RE6 G1 RPI33/SEG34/PMCS1/CN66/RE8
C2 VDD G2 AN21/RPI34/SEG35/PMPA19/CN67/RE9
C3 SEG61/CN79/RG12 G3 TMS/SEG49/CTED0/CN33/RA0
C4 SEG60/PMA16/CTED11/CN81/RG14 G4 N/C
C5 AN23/SEG58/CN39/RA6 G5 VDD
C6 N/C G6 VSS
C7 C3INA/SEG26/PMD15/CN16/RD7 G7 VSS
C8 RP25/SEG23/PMWR/CN13/RD4 G8 N/C
C9 N/C G9 TDO/CN38/RA5
C10 SOSCI/RC13 G10 SDA2/SEG57/PMA20/CN36/RA3
C11 RP12/SEG16/C3INC/PMA14/CS1/CN56/RD11 G11 TDI/PMA21/CN37/RA4
D1 RPI38/SEG32/CN45/RC1 H1 PGEC3/AN5/C1INA/RP18/SEG2/CN7/RB5
D2 PMD7/LCDBIAS0/CN65/RE7 H2 PGED3/AN4/C1INB/RP28/SEG3/CN6/RB4
D3 PMD5/CTED4/LCDBIAS2/CN63/RE5 H3 N/C
D4 N/C H4 N/C
D5 N/C H5 N/C
D6 N/C H6 VDD
D7 C3INB/SEG25/PMD14/CN15/RD6 H7 N/C
D8 SEG45/PMD13/CN19/RD13 H8 CN83/RF7
D9 RP11/SEG17/CN49/RD0 H9 INT0/CN84/RF6
D10 N/C H10 SCL1/SEG28/CN72/RG2
D11 RP3/SEG15/C3IND/PMA15/CS2/CN55/RD10 H11 SCL2/SEG56/CN35/RA2
Legend: RPn and RPIn represent remappable pins for Peripheral Pin Select functions.
Note: Pinouts are subject to change.
PIC24FJ128GA310 FAMILY
DS39996F-page 8 2010-2011 Microchip Technology Inc.
J1 AN3/C2INA/SEG4/CN5/RB3 K7 AN14/RP14/SEG8/CTPLS/CTED5/PMA1/CN32/RB14
J2 AN2/C2INB/RP13/SEG5/CTCMP/CTED13/CN4/RB2 K8 VDD
J3 PGED2/AN7/RP7/CN25/RB7 K9 RP5/SEG39/CN21/RD15
J4 AVDD K10 RP16/SEG12/CN71/RF3
J5 AN11/PMA12/CN29/RB11 K11 RP30/SEG40/CN70/RF2
J6 TCK/CN34/RA1 L1 PGEC2/AN6/RP6/LCDBIAS3/CN24/RB6
J7 AN12/SEG18/CTED2/PMA11/CN30/RB12 L2 VREF-/SEG36/PMA7/CN41/RA9
J8 N/C L3 AVSS
J9 N/C L4 AN9/RP9/COM6/SEG30/T1CK/CN27/RB9
J10 RP15/SEG41/CN74/RF8 L5 CVREF/AN10/COM5/SEG29/PMA13/CN28/RB10
J11 SDA1/SEG47/CN73/RG3 L6 RP31/SEG54/CN76/RF13
K1 PGEC1/CVREF-/AN1/RP1/SEG6/CTED12/CN3/RB1 L7 AN13/SEG19/CTED1/PMA10/CN31/RB13
K2 PGD1/CVREF+/AN0/RP0/SEG7/CN2/RB0 L8 AN15/RP29/SEG9/CTED6/REFO/PMA0/CN12/RB15
K3 VREF+/SEG37/PMA6/CN42/RA10 L9 RPI43/SEG38/CN20/RD14
K4 AN8/RP8/COM7/SEG31/CN26/RB8 L10 RP10/SEG10/PMA9/CN17/RF4
K5 N/C L11 RP17/SEG11/PMA8/CN18/RF5
K6 RPI32/SEG55/CTED7/PMA18/CN75/RF12
TABLE 1: COMPLETE PIN FUNCTION DESCRIPTIONS FOR 121-PIN DEVICES (CONTINUED)
PinFunctionPinFunction
Legend: RPn and RPIn represent remappable pins for Peripheral Pin Select functions.
Note: Pinouts are subject to change.
2010-2011 Microchip Technology Inc. DS39996F-page 9
PIC24FJ128GA310 FAMILY
Table of Contents
1.0 Device Overview ........................................................................................................................................................................ 11
2.0 Guidelines for Getting Started with 16-bit Microcontrollers ........................................................................................................ 29
3.0 CPU ........................................................................................................................................................................................... 35
4.0 Memory Organization ................................................................................................................................................................. 41
5.0 Direct Memory Access Controller (DMA) ................................................................................................................................... 75
6.0 Flash Program Memory.............................................................................................................................................................. 83
7.0 Resets ........................................................................................................................................................................................ 89
8.0 Interrupt Controller ..................................................................................................................................................................... 95
9.0 Oscillator Configuration ............................................................................................................................................................ 145
10.0 Power-Saving Features............................................................................................................................................................ 155
11.0 I/O Ports ................................................................................................................................................................................... 167
12.0 Timer1 ...................................................................................................................................................................................... 197
13.0 Timer2/3 and Timer4/5 ............................................................................................................................................................ 199
14.0 Input Capture with Dedicated Timers ....................................................................................................................................... 205
15.0 Output Compare with Dedicated Timers .................................................................................................................................. 211
16.0 Serial Peripheral Interface (SPI)............................................................................................................................................... 221
17.0 Inter-Integrated Circuit™ (I2C™).............................................................................................................................................. 233
18.0 Universal Asynchronous Receiver Transmitter (UART) ........................................................................................................... 241
19.0 Data Signal Modulator.............................................................................................................................................................. 249
20.0 Enhanced Parallel Master Port (EPMP) ................................................................................................................................... 253
21.0 Liquid Crystal Display (LCD) Controller.................................................................................................................................... 265
22.0 Real-Time Clock and Calendar (RTCC) .................................................................................................................................. 275
23.0 32-Bit Programmable Cyclic Redundancy Check (CRC) Generator ........................................................................................ 289
24.0 12-Bit A/D Converter with Threshold Scan............................................................................................................................... 295
25.0 Triple Comparator Module........................................................................................................................................................ 315
26.0 Comparator Voltage Reference................................................................................................................................................ 321
27.0 Charge Time Measurement Unit (CTMU) ................................................................................................................................ 323
28.0 High/Low-Voltage Detect (HLVD)............................................................................................................................................. 331
29.0 Section Special Features ........................................................................................................................................................ 333
30.0 Development Support............................................................................................................................................................... 347
31.0 Instruction Set Summary .......................................................................................................................................................... 351
32.0 Electrical Characteristics .......................................................................................................................................................... 359
33.0 Packaging Information.............................................................................................................................................................. 377
Appendix A: Revision History............................................................................................................................................................. 393
Index .................................................................................................................................................................................................. 395
The Microchip Web Site..................................................................................................................................................................... 401
Customer Change Notification Service .............................................................................................................................................. 401
Customer Support .............................................................................................................................................................................. 401
Reader Response .............................................................................................................................................................................. 402
Product Identification System ............................................................................................................................................................ 403
PIC24FJ128GA310 FAMILY
DS39996F-page 10 2010-2011 Microchip Technology Inc.
TO OUR VALUED CUSTOMERS
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If you have any questions or comments regarding this publication, please contact the Marketing Communications Department via
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2010-2011 Microchip Technology Inc. DS39996F-page 11
PIC24FJ128GA310 FAMILY
1.0 DEVICE OVERVIEW
This document contains device-specific information for
the following devices:
The PIC24FJ128GA310 family adds many new fea-
tures to Microchip‘s 16-bit microcontrollers, including
new ultra low-power features, Direct Memory Access
(DMA) for peripherals, and a built-in LCD Controller
and Driver. Together, these provide a wide range of
powerful features in one economical and power-saving
package.
1.1 Core Features
1.1.1 16-BIT ARCHITECTURE
Central to all PIC24F devices is the 16-bit modified
Harvard architecture, first introduced with Microchip’s
dsPIC® Digital Signal Controllers (DSCs). The PIC24F
CPU core offers a wide range of enhancements, such
as:
• 16-bit data and 24-bit address paths with the
ability to move information between data and
memory spaces
• Linear addressing of up to 12 Mbytes (program
space) and 32 Kbytes (data)
• A 16-element working register array with built-in
software stack support
• A 17 x 17 hardware multiplier with support for
integer math
• Hardware support for 32 by 16-bit division
• An instruction set that supports multiple
addressing modes and is optimized for high-level
languages, such as ‘C’
• Operational performance up to 16 MIPS
1.1.2 nanoWatt XLP POWER-SAVING
TECHNOLOGY
The PIC24FJ128GA310 family of devices introduces a
greatly-expanded range of power-saving operating
modes for the ultimate in power conservation. The new
modes include:
• Retention Sleep, with essential circuits being
powered from a separate low-voltage regulator
• Deep Sleep without RTCC, for the lowest possible
power consumption under software control
•V
BAT mode (with or without RTCC), to continue
operation limited operation from a back-up battery
when VDD is removed
Many of these new low-power modes also support the
continuous operation of the low-power, on-chip
Real-Time Clock/Calendar (RTCC), making it possible
for an application to keep time while the device is
otherwise asleep.
Aside from these new features, PIC24FJ128GA310 fam-
ily devices also include all of the legacy power-saving
features of previous PIC24F microcontrollers, such as:
• On-the-Fly Clock Switching, allowing the selection
of a lower-power clock during run time
• Doze Mode Operation, for maintaining peripheral
clock speed while slowing the CPU clock
• Instruction-Based Power-Saving Modes, for quick
invocation of Idle and the many Sleep modes.
1.1.3 OSCILLATOR OPTIONS AND
FEATURES
All of the devices in the PIC24FJ128GA310 family offer
five different oscillator options, allowing users a range
of choices in developing application hardware. These
include:
• Two Crystal modes
• Two External Clock modes
• A Phase Lock Loop (PLL) frequency multiplier,
which allows clock speeds of up to 32 MHz
• A Fast Internal Oscillator (FRC) (nominal 8 MHz
output) with multiple frequency divider options
• A separate Low-Power Internal RC Oscillator
(LPRC) (31 kHz nominal) for low-power,
timing-insensitive applications.
The internal oscillator block also provides a stable
reference source for the Fail-Safe Clock Monitor
(FSCM). This option constantly monitors the main clock
source against a reference signal provided by the inter-
nal oscillator and enables the controller to switch to the
internal oscillator, allowing for continued low-speed
operation or a safe application shutdown.
1.1.4 EASY MIGRATION
Regardless of the memory size, all devices share the
same rich set of peripherals, allowing for a smooth
migration path as applications grow and evolve. The
consistent pinout scheme used throughout the entire
family also aids in migrating from one device to the next
larger, or even in jumping from 64-pin to 100-pin
devices.
The PIC24F family is pin compatible with devices in the
dsPIC33 family, and shares some compatibility with the
pinout schema for PIC18 and dsPIC30. This extends
the ability of applications to grow from the relatively
simple, to the powerful and complex, yet still selecting
a Microchip device.
• PIC24FJ64GA306 • PIC24FJ128GA306
• PIC24FJ64GA308 • PIC24FJ128GA308
• PIC24FJ64GA310 • PIC24FJ128GA310
PIC24FJ128GA310 FAMILY
PIC24FJDS39996F-page 12 2010-2011 Microchip Technology Inc.
1.2 DMA Controller
PIC24FJ128GA310 family devices also introduce a
new Direct Memory Access Controller (DMA) to the
PIC24F architecture. This module acts in concert with
the CPU, allowing data to move between data memory
and peripherals without the intervention of the CPU,
increasing data throughput and decreasing execution
time overhead. Six independently programmable chan-
nels make it possible to service multiple peripherals at
virtually the same time, with each channel peripheral
performing a different operation. Many types of data
transfer operations are supported.
1.3 LCD Controller
With the PIC24FJ128GA310 family of devices,
Microchip introduces its versatile Liquid Crystal Display
(LCD) controller and driver to the PIC24F family. The
on-chip LCD driver includes many features that make
the integration of displays in low-power applications
easier. These include an integrated voltage regulator
with charge pump and an integrated internal resistor
ladder that allows contrast control in software and
display operation above device VDD.
1.4 Other Special Features
•Peripheral Pin Sele ct: The Peripheral Pin Select
(PPS) feature allows most digital peripherals to be
mapped over a fixed set of digital I/O pins. Users
may independently map the input and/or output of
any one of the many digital peripherals to any one
of the I/O pins.
•Communications: The PIC24FJ128GA310 family
incorporates a range of serial communication
peripherals to handle a range of application
requirements. There are two independent I2C™
modules that support both Master and Slave
modes of operation. Devices also have, through
the PPS feature, four independent UARTs with
built-in IrDA® encoders/decoders and two SPI
modules.
•Analog Features: All members of the
PIC24FJ128GA310 family include the new 12-bit
A/D Converter (A/D) module and a triple compara-
tor module. The A/D module incorporates a range
of new features that allow the converter to assess
and make decisions on incoming data, reducing
CPU overhead for routine A/D conversions. The
comparator module includes three analog com-
parators that are configurable for a wide range of
operations.
•CTMU Interface: In addition to their other analog
features, members of the PIC24FJ128GA310
family include the CTMU interface module. This
provides a convenient method for precision time
measurement and pulse generation, and can
serve as an interface for capacitive sensors.
•Enhanced Parallel Master/Parallel Slave Port:
This module allows rapid and transparent access
to the microcontroller data bus, and enables the
CPU to directly address external data memory. The
parallel port can function in Master or Slave mode,
accommodating data widths of 4, 8 or 16 bits, and
address widths up to 23 bits in Master modes.
•Real-Time Clock and Calendar (RTCC): This
module implements a full-featured clock and
calendar with alarm functions in hardware, freeing
up timer resources and program memory space
for use of the core application.
•Data Signal Modulator (DSM): The Data Signal
Modulator (DSM) allows the user to mix a digital
data stream (the “modulator signal”) with a carrier
signal to produce a modulated output.
1.5 Det ails on Individual Family
Members
Devices in the PIC24FJ128GA310 family are available
in 64-pin, 80-pin and 100-pin packages. The general
block diagram for all devices is shown in Figure 1-1.
The devices are differentiated from each other in
six ways:
1. Flash program memory (64 Kbytes for
PIC24FJ64GA3XX devices and 128 Kbytes for
PIC24FJ128GA3XX devices).
2. Available I/O pins and ports (53 pins on 6 ports
for 64-pin devices, 69 pins on 7 ports for 80-pin
devices and 85 pins on 7 ports for 100-pin
devices).
3. Available Interrupt-on-Change Notification (ICN)
inputs (52 on 64-pin devices, 66 on 80-pin
devices and 82 on 100-pin devices).
4. Available remappable pins (29 pins on 64-pin
devices, 40 on 80-pin devices and 44 pins on
100-pin devices).
5. Maximum available drivable LCD pixels (272 on
64-pin devices, 368 on 80-pin devices and
480 on 100-pin devices.)
6. Analog input channels (16 channels for 64-pin
and 80-pin devices, and 24 channels for 100-pin
devices).
All other features for devices in this family are identical.
These are summarized in Table 1-1, Table 1-2 and
Table 1-3.
A list of the pin features available on the
PIC24FJ128GA310 family devices, sorted by function,
is shown in Table 1-4. Note that this table shows the pin
location of individual peripheral features and not how
they are multiplexed on the same pin. This information
is provided in the pinout diagrams in the beginning of
the data sheet. Multiplexed features are sorted by the
priority given to a feature, with the highest priority
peripheral being listed first.
2010-2011 Microchip Technology Inc. DS39996F-page 13
PIC24FJ128GA310 FAMILY
TABLE 1-1: DEVICE FEATURES FOR THE PIC24FJ128GA310 FAMILY: 64-PIN
Features PIC24FJ64GA306 PIC24FJ128GA306
Operating Frequency DC – 32 MHz
Program Memory (bytes) 64K 128K
Program Memory (instructions) 22,016 44,032
Data Memory (bytes) 8K
Interrupt Sources (soft vectors/
NMI traps)
65 (61/4)
I/O Ports Ports B, C, D, E, F, G
Total I/O Pins 53
Remappable Pins 30 (29 I/O, 1 Input only)
Timers:
Total Number (16-bit) 5(1)
32-Bit (from paired 16-bit timers) 2
Input Capture Channels 7(1)
Output Compare/PWM Channels 7(1)
Input Change Notification Interrupt 52
Serial Communications:
UART 4(1)
SPI (3-wire/4-wire) 2(1)
I2C™ 2
Digital Signal Modulator Yes
Parallel Communications (EPMP/PSP) Yes
JTAG Boundary Scan Yes
12/10-Bit Analog-to-Digital Converter
(A/D) Module (input channels)
16
Analog Comparators 3
CTMU Interface Yes
LCD Controller (available pixels) 240 (30 SEG x 8 COM)
Resets (and Delays) Core POR, VDD POR, VBAT POR,BOR, RESET Instruction,
MCLR, WDT; Illegal Opcode, REPEAT Instruction,
Hardware Traps, Configuration Word Mismatch
(OST, PLL Lock)
Instruction Set 76 Base Instructions, Multiple Addressing Mode Variations
Packages 64-Pin TQFP and QFN
Note 1: Peripherals are accessible through remappable pins.
PIC24FJ128GA310 FAMILY
PIC24FJDS39996F-page 14 2010-2011 Microchip Technology Inc.
TABLE 1-2: DEVICE FEATURES FOR THE PIC24FJ128GA310 FAMILY: 80-PIN
Features PIC24FJ64GA308 PIC24FJ128GA308
Operating Frequency DC – 32 MHz
Program Memory (bytes) 64K 128K
Program Memory (instructions) 22,016 44,032
Data Memory (bytes) 8K
Interrupt Sources (soft vectors/
NMI traps)
65 (61/4)
I/O Ports Ports A, B, C, D, E, F, G
Total I/O Pins 69
Remappable Pins 40 (31 I/O, 9 Input only)
Timers:
Total Number (16-bit) 5(1)
32-Bit (from paired 16-bit timers) 2
Input Capture Channels 7(1)
Output Compare/PWM Channels 7(1)
Input Change Notification Interrupt 66
Serial Communications:
UART 4(1)
SPI (3-wire/4-wire) 2(1)
I2C™ 2
Digital Signal Modulator Yes
Parallel Communications (EPMP/PSP) Yes
JTAG Boundary Scan Yes
12/10-Bit Analog-to-Digital Converter
(A/D) Module (input channels)
16
Analog Comparators 3
CTMU Interface Yes
LCD Controller (available pixels) 368 (46 SEG x 8 COM)
Resets (and Delays) Core POR, VDD POR, VBAT POR,BOR, RESET Instruction,
MCLR, WDT; Illegal Opcode, REPEAT Instruction,
Hardware Traps, Configuration Word Mismatch
(OST, PLL Lock)
Instruction Set 76 Base Instructions, Multiple Addressing Mode Variations
Packages 80-Pin TQFP and QFN
Note 1: Peripherals are accessible through remappable pins.
2010-2011 Microchip Technology Inc. DS39996F-page 15
PIC24FJ128GA310 FAMILY
TABLE 1-3: DEVICE FEATURES FOR THE PIC24FJ128GA310 FAMILY: 100-PIN DEVICES
Features PIC24FJ64GA310 PIC24FJ128GA310
Operating Frequency DC – 32 MHz
Program Memory (bytes) 64K 128K
Program Memory (instructions) 22,016 44,032
Data Memory (bytes) 8K
Interrupt Sources (soft vectors/NMI
traps)
66 (62/4)
I/O Ports Ports A, B, C, D, E, F, G
To t a l I / O Pi n s 85
Remappable Pins 44 (32 I/O, 12 input only)
Timers:
Total Number (16-bit) 5(1)
32-Bit (from paired 16-bit timers) 2
Input Capture Channels 7(1)
Output Compare/PWM Channels 7(1)
Input Change Notification Interrupt 82
Serial Communications:
UART 4(1)
SPI (3-wire/4-wire) 2(1)
I2C™ 2
Digital Signal Modulator Yes
Parallel Communications
(EPMP/PSP)
Yes
JTAG Boundary Scan Yes
12/10-Bit Analog-to-Digital Converter
(A/D) Module (input channels)
24
Analog Comparators 3
CTMU Interface Yes
LCD Controller (available pixels) 480 (60 SEG x 8 COM)
Resets (and delays) Core POR, VDD POR, VBAT POR,BOR, RESET Instruction,
MCLR, WDT; Illegal Opcode, REPEAT Instruction,
Hardware Traps, Configuration Word Mismatch
(OST, PLL Lock)
Instruction Set 76 Base Instructions, Multiple Addressing Mode Variations
Packages 100-Pin TQFP and 121-Pin BGA
Note 1: Peripherals are accessible through remappable pins.
PIC24FJ128GA310 FAMILY
PIC24FJDS39996F-page 16 2010-2011 Microchip Technology Inc.
FIGURE 1-1: PIC24FJ1 28G A3 10 FAMILY GENERAL BLOCK DIAGRAM
Instruction
Decode and
Control
16
PCH PCL
16
Program Counter
16-Bit ALU
23
24
Data Bus
Inst Register
16
Divide
Support
Inst Latch
16
EA MUX
Read AGU
Write AGU
16
16
8
Interrupt
Controller
EDS and
Stack
Control
Logic
Repeat
Control
Logic
Data Latch
Data RAM
Address
Latch
Address Latch
Extended Data
Data Latch
16
Address Bus
Literal
23
Control Signals
16
16
16 x 16
W Reg Array
Multiplier
17x17
OSCI/CLKI
OSCO/CLKO
VDD, VSS
Timing
Generation
MCLR
Power-up
Timer
Oscillator
Start-up Timer
Power-on
Reset
Watchdog
Timer
LVD & BOR
(2)
Precision
Reference
Band Gap
FRC/LPRC
Oscillators
Regulators
Voltage
VCAP
PORTA(1)
PORTC(1)
(12 I/O)
(8 I/O)
PORTB
(16 I/O)
Note 1:
Not all I/O pins or features are implemented on all device pinout configurations. See Ta b l e 1 - 4 for specific implementations by pin count
.
2:
BOR functionality is provided when the on-board voltage regulator is enabled.
3:
These peripheral I/Os are only accessible through remappable pins.
PORTD(1)
(16 I/O)
Comparators(3)
Timer2/3(3)
Timer1 RTCC
IC
A/D
12-Bit
OC/PWM SPI I2C
Timer4/5(3)
™
EPMP/PSP
1-7(3) ICNs(1) UART
REFO
PORTE(1)
PORTG(1)
(10 I/O)
(12 I/O)
PORTF(1)
(10 I/O)
1/2(3) 1/2 1/2/3/4(3)
1-7(3) CTMU
Digital
LCD
Driver
Space
Program Memory/
Modulator
DMA
Controller
Data
DMA
Data Bus
16
Tab l e D at a
Access Control
VBAT
2010-2011 Microchip Technology Inc. DS39996F-page 17
PIC24FJ128GA310 FAMILY
TABLE 1-4: PIC24FJ128GA310 FAM ILY PINOUT DES CRIPTION S
Pin
Function
Pin Numbe r/Grid Locator
I/O Input
Buffer Description
64-Pin
TQFP 80-Pin
TQFP 100-Pin
TQFP 121-Pin
BGA
AN0 16 20 25 K2 I ANA A/D Analog Inputs.
AN1 151924K1 IANA
AN1- 15 19 24 K1 I ANA
AN2 14 18 23 J2 I ANA A/D Analog Inputs.
AN3 131722J1 IANA
AN4 121621H2 IANA
AN5 11 15 20 H1 I ANA
AN6 172126L1 IANA
AN7 182227J3 IANA
AN8 212732K4 IANA
AN9 222833L4 IANA
AN10 23 29 34 L5 I ANA
AN11 24 30 35 J5 I ANA
AN12 27 33 41 J7 I ANA
AN13 28 34 42 L7 I ANA
AN14 29 35 43 K7 I ANA
AN15 30 36 44 L8 I ANA
AN16 — — 9 E1 I ANA
AN17 — — 10 E3 I ANA
AN18 — — 11 F4 I ANA
AN19 — — 12 F2 I ANA
AN20 — — 14 F3 I ANA
AN21 — — 19 G2 I ANA
AN22 — — 92 B5 I ANA
AN23 — — 91 C5 I ANA
AVDD 19 25 30 J4 P — Positive Supply for Analog modules.
AVSS 20 26 31 L3 P — Ground Reference for Analog modules.
C1INA 11 15 20 H1 I ANA Comparator 1 Input A.
C1INB 12 16 21 H2 I ANA Comparator 1 Input B.
C1INC 5 7 11 F4 I ANA Comparator 1 Input C.
C1IND 4 6 10 E3 I ANA Comparator 1 Input D.
C2INA 13 17 22 J1 I ANA Comparator 2 Input A.
C2INB 14 18 23 J2 I ANA Comparator 2 Input B.
C2INC 8 10 14 F3 I ANA Comparator 2 Input C.
C2IND 6 8 12 F2 I ANA Comparator 2 Input D.
C3INA 55 69 84 C7 I ANA Comparator 3 Input A.
C3INB 54 68 83 D7 I ANA Comparator 3 Input B.
C3INC 45 57 71 C11 I ANA Comparator 3 Input C.
C3IND 44 56 70 D11 I ANA Comparator 3 Input D.
CLKI 39 49 63 F9 I ANA Main Clock Input Connection.
CLKO 40 50 64 F11 O — System Clock Output.
Legend: TTL = TTL input buffer ST = Schmitt Trigger input buffer
ANA = Analog level input/output I2C™ = I2C/SMBus input buffer
PIC24FJ128GA310 FAMILY
PIC24FJDS39996F-page 18 2010-2011 Microchip Technology Inc.
CN2 16 20 25 K2 I ST Interrupt-on-Change Inputs.
CN3 15 19 24 K1 I ST
CN4 14 18 23 J2 I ST
CN5 13 17 22 J1 I ST
CN6 12 16 21 H2 I ST
CN7 11 15 20 H1 I ST
CN8 4 6 10 E3 I ST
CN9 5 7 11 F4 I ST
CN10 6 8 12 F2 I ST
CN11 8 10 14 F3 I ST
CN12 303644L8 IST
CN13 526681C8 I ST
CN14 536782B8 IST
CN15 546883D7 I ST
CN16 556984C7 I ST
CN17 313949L10IST
CN18 324050L11I ST
CN19 — 65 80 D8 I ST
CN20 — 37 47 L9 I ST
CN21 — 38 48 K9 I ST
CN22 405064F11IST
CN23 394963F9 IST
CN24 172126L1 IST
CN25 182227J3 IST
CN26 212732K4 IST
CN27 222833L4 IST
CN28 232934L5 IST
CN29 243035J5 IST
CN30 273341J7 IST
CN31 283442L7 IST
CN32 293543K7 IST
CN33 — — 17 G3 I ST
CN34 — — 38 J6 I ST
CN35 — — 58 H11 I ST
CN36 — — 59 G10 I ST
CN37 — — 60 G11 I ST
CN38 — — 61 G9 I ST
CN39 — — 91 C5 I ST
CN40 — — 92 B5 I ST
CN41 — 23 28 L2 I ST
CN42 — 24 29 K3 I ST
CN43 — 52 66 E11 I ST
TABLE 1-4: PIC24FJ128GA310 FAMILY PINOUT DESCRIPTIONS (CONTINUED)
Pin
Function
Pin Numbe r/Grid Locator
I/O Input
Buffer Description
64-Pin
TQFP 80-Pin
TQFP 100-Pin
TQFP 121-Pin
BGA
Legend: TTL = TTL input buffer ST = Schmitt Trigger input buffer
ANA = Analog level input/output I2C™ = I2C/SMBus input buffer
2010-2011 Microchip Technology Inc. DS39996F-page 19
PIC24FJ128GA310 FAMILY
CN44 — 53 67 E8 I ST Interrupt-on-Change Inputs.
CN45 — 4 6 D1 I ST
CN46 — — 7 E4 I ST
CN47 — 5 8 E2 I ST
CN48 — — 9 E1 I ST
CN49 465872D9 I ST
CN50 496176A11IST
CN51 506277A10IST
CN52 516378B9 IST
CN53 425468E9 IST
CN54 435569E10IST
CN55 445670D11I ST
CN56 455771C11I ST
CN57 — 64 79 A9 I ST
CN58 607693A4 IST
CN59 617794B4 IST
CN60 627898119I ST
CN61 637999A2 IST
CN62 64 80 100 A1 I ST
CN63 1 1 3 D3 I ST
CN64 2 2 4 C1 I ST
CN65 3 3 5 D2 I ST
CN66 — 13 18 G1 I ST
CN67 — 14 19 G2 I ST
CN68 587287B6 IST
CN69 597388A6 IST
CN70 344252K11IST
CN71 334151K10IST
CN72 374757H10IST
CN73 364656J11IST
CN74 — 43 53 J10 I ST
CN75 — — 40 K6 I ST
CN76 — — 39 L6 I ST
CN77 — 75 90 A5 I ST
CN78 — 74 89 E6 I ST
CN79 — — 96 C3 I ST
CN80 — — 97 A3 I ST
CN81 — — 95 C4 I ST
CN82 — — 1 B2 I ST
CN83 — 44 54 H8 I ST
CN84 354555H9 I ST
TABLE 1-4: PIC24FJ128GA310 FAMILY PINOUT DESCRIPTIONS (CONTINUED)
Pin
Function
Pin Numbe r/Grid Locator
I/O Input
Buffer Description
64-Pin
TQFP 80-Pin
TQFP 100-Pin
TQFP 121-Pin
BGA
Legend: TTL = TTL input buffer ST = Schmitt Trigger input buffer
ANA = Analog level input/output I2C™ = I2C/SMBus input buffer
PIC24FJ128GA310 FAMILY
PIC24FJDS39996F-page 20 2010-2011 Microchip Technology Inc.
COM0 63 79 99 A2 O — LCD Driver Common Outputs.
COM1 62 78 98 B3 O —
COM2 61 77 94 B4 O —
COM3 60 76 93 A4 O —
COM4 59 73 88 A6 O —
COM5 23 29 34 L5 O —
COM6 22 28 33 L4 O —
COM7 21 27 32 K4 O —
CS1 45 57 71 C11 I/O ST/TTL Parallel Master Port Chip Select 1 Strobe (shared
with PMA14)
CS2 44 56 70 D11 O — Parallel Master Port Chip Select 2 Strobe (shared
with PMA15)
CTCMP 14 18 23 J2 I ANA CTMU Comparator 2 Input (Pulse mode).
CTED0 — — 17 G3 I ANA CTMU External Edge Inputs.
CTED1 283442L7 IANA
CTED2 273341J7 IANA
CTED3 — — 1 B2 I ANA
CTED4 1 1 3 D3 I ANA
CTED5 293543K7 IANA
CTED6 303644L8 IANA
CTED7 — — 40 47 I ANA
CTED8 64 80 100 A1 I ANA
CTED9 637999A2 IANA
CTED10 — — 97 A3 I ANA
CTED11 — — 95 C4 I ANA
CTED12 15 19 24 K1 I ANA
CTED13 14 18 23 J2 I ANA
CTPLS 29 35 43 K7 O — CTMU Pulse Output.
CVREF 23 29 34 L5 O — Comparator Voltage Reference Output.
CVREF+ 16 20 25 K2 I ANA Comparator/A/D Reference Voltage (low) Input.
CVREF- 15 19 24 K1 I ANA Comparator/A/D Reference Voltage (high) Input.
INT0 35 45 55 H9 I ST External Interrupt Input 0.
LCDBIAS0 3 3 5 D2 I ANA Bias Inputs for LCD Driver Charge Pump.
LCDBIAS1 2 2 4 C1 I ANA
LCDBIAS2 1 1 3 D3 I ANA
LCDBIAS3 17 21 26 L1 I ANA
LVDIN 64 80 100 A1 I ANA Low-Voltage Detect Input.
MCLR 7 9 13 F1 I ST Master Clear (device Reset) Input. This line is
brought low to cause a Reset.
OSCI 39 49 63 F9 I ANA Main Oscillator Input Connection.
OSCO 40 50 64 F11 O — Main Oscillator Output Connection.
TABLE 1-4: PIC24FJ128GA310 FAMILY PINOUT DESCRIPTIONS (CONTINUED)
Pin
Function
Pin Numbe r/Grid Locator
I/O Input
Buffer Description
64-Pin
TQFP 80-Pin
TQFP 100-Pin
TQFP 121-Pin
BGA
Legend: TTL = TTL input buffer ST = Schmitt Trigger input buffer
ANA = Analog level input/output I2C™ = I2C/SMBus input buffer
2010-2011 Microchip Technology Inc. DS39996F-page 21
PIC24FJ128GA310 FAMILY
PGEC1 15 19 24 K1 I/O ST In-Circuit Debugger/Emulator/ICSP™ Programming
Clock.
PGED1 16 20 25 K2 I/O ST In-Circuit Debugger/Emulator/ICSP Programming
Data.
PGEC2 17 21 26 L1 I/O ST In-Circuit Debugger/Emulator/ICSP Programming
Clock.
PGED2 18 22 27 J3 I/O ST In-Circuit Debugger/Emulator/ICSP Programming
Data.
PGEC3 11 15 20 H1 I/O ST In-Circuit Debugger/Emulator/ICSP Programming
Clock.
PGED3 12 16 21 H2 I/O ST In-Circuit Debugger/Emulator/ICSP Programming
Data.
PMA0 30 36 44 L8 I/O ST Parallel Master Port Address Bit 0 Input (Buffered
Slave modes) and Output (Master modes).
PMA1 29 35 43 K7 I/O ST Parallel Master Port Address Bit 1 Input (Buffered
Slave modes) and Output (Master modes).
PMA2 8 10 14 F3 O — Parallel Master Port Address (bits<22:2>).
PMA3 6 8 12 F2 O —
PMA4 5 7 11 F4 O —
PMA5 4 6 10 E3 O —
PMA6 16 24 29 K3 O —
PMA7 22 23 28 L2 O —
PMA8 32 40 50 L11 O —
PMA9 31 39 49 L10 O —
PMA10 283442L7O—
PMA11 27 33 41 J7 O —
PMA12 24 30 35 J5 O —
PMA13 232934L5O—
PMA14 45 57 71 C11 O —
PMA15 44 56 70 D11 O —
PMA16 — — 95 C4 O —
PMA17 — — 92 B5 O —
PMA18 — — 40 K6 O —
PMA19 — 14 19 G2 O —
PMA20 — — 59 G10 O —
PMA21 — — 60 G11 O —
PMA22 — 52 66 E11 O —
PMACK1 50 62 77 A10 I ST/TTL Parallel Master Port Acknowledge Input 1.
PMACK2 43 55 69 E10 I ST/TTL Parallel Master Port Acknowledge Input 2.
PMBE0 51 63 78 B9 O — Parallel Master Port Byte Enable 0 Strobe.
PMBE1 — 53 67 E8 O — Parallel Master Port Byte Enable 1 Strobe.
PMCS1 — 13 18 G1 I/O ST/TTL Parallel Master Port Chip Select 1 Strobe.
PMCS2 — — 9 E1 O — Parallel Master Port Chip Select 2 Strobe.
TABLE 1-4: PIC24FJ128GA310 FAMILY PINOUT DESCRIPTIONS (CONTINUED)
Pin
Function
Pin Numbe r/Grid Locator
I/O Input
Buffer Description
64-Pin
TQFP 80-Pin
TQFP 100-Pin
TQFP 121-Pin
BGA
Legend: TTL = TTL input buffer ST = Schmitt Trigger input buffer
ANA = Analog level input/output I2C™ = I2C/SMBus input buffer
PIC24FJ128GA310 FAMILY
PIC24FJDS39996F-page 22 2010-2011 Microchip Technology Inc.
PMD0 60 76 93 A4 I/O ST/TTL Parallel Master Port Data (Demultiplexed Master
mode) or Address/Data (Multiplexed Master modes).
PMD1 61 77 94 B4 I/O ST/TTL
PMD2 62 78 98 B3 I/O ST/TTL
PMD3 63 79 99 A2 I/O ST/TTL
PMD4 64 80 100 A1 I/O ST/TTL
PMD5 1 1 3 D3 I/O ST/TTL
PMD6 2 2 4 C1 I/O ST/TTL
PMD7 3 3 5 D2 I/O ST/TTL
PMD8 — 75 90 A5 I/O ST/TTL
PMD9 — 74 89 E6 I/O ST/TTL
PMD10 — 73 88 A6 I/O ST/TTL
PMD11 — 72 87 B6 I/O ST/TTL
PMD12 — 64 79 A9 I/O ST/TTL
PMD13 — 65 80 D8 I/O ST/TTL
PMD14 — 68 83 D7 I/O ST/TTL
PMD15 — 69 84 C7 I/O ST/TTL
PMRD 53 67 82 B8 O — Parallel Master Port Read Strobe.
PMWR 52 66 81 C8 O — Parallel Master Port Write Strobe.
RA0 — — 17 G3 I/O ST PORTA Digital I/O.
RA1 — — 38 J6 I/O ST
RA2 — — 58 H11 I/O ST
RA3 — — 59 G10 I/O ST
RA4 — — 60 G11 I/O ST
RA5 — — 61 G9 I/O ST
RA6 — — 91 C5 I/O ST
RA7 — — 92 B5 I/O ST
RA9 — 23 28 L2 I/O ST
RA10 — 24 29 K3 I/O ST
RA14 — 52 66 E11 I/O ST
RA15 — 53 67 E8 I/O ST
TABLE 1-4: PIC24FJ128GA310 FAMILY PINOUT DESCRIPTIONS (CONTINUED)
Pin
Function
Pin Numbe r/Grid Locator
I/O Input
Buffer Description
64-Pin
TQFP 80-Pin
TQFP 100-Pin
TQFP 121-Pin
BGA
Legend: TTL = TTL input buffer ST = Schmitt Trigger input buffer
ANA = Analog level input/output I2C™ = I2C/SMBus input buffer
2010-2011 Microchip Technology Inc. DS39996F-page 23
PIC24FJ128GA310 FAMILY
RB0 16 20 25 K2 I/O ST PORTB Digital I/O.
RB1 151924K1I/OST
RB2 141823J2I/OST
RB3 131722J1I/OST
RB4 121621H2I/OST
RB5 11 15 20 H1 I/O ST
RB6 172126L1I/OST
RB7 182227J3I/OST
RB8 212732K4I/OST
RB9 222833L4I/OST
RB10 23 29 34 L5 I/O ST
RB11 24 30 35 J5 I/O ST
RB12 27 33 41 J7 I/O ST
RB13 28 34 42 L7 I/O ST
RB14 29 35 43 K7 I/O ST
RB15 30 36 44 L8 I/O ST
RC1 — 4 6 D1 I/O ST PORTC Digital I/O.
RC2 — — 7 E4 I/O ST
RC3 — 5 8 E2 I/O ST
RC4 — — 9 E1 I/O ST
RC12 394963F9I/OST
RC13 475973C10IST
RC14 486074B11IST
RC15 405064F11I/OST
RD0 46 58 72 D9 I/O ST PORTD Digital I/O.
RD1 49 61 76 A11 I/O ST
RD2 50 62 77 A10 I/O ST
RD3 51 63 78 B9 I/O ST
RD4 52 66 81 C8 I/O ST
RD5 53 67 82 B8 I/O ST
RD6 54 68 83 D7 I/O ST
RD7 55 69 84 C7 I/O ST
RD8 42 54 68 E9 I/O ST
RD9 43 55 69 E10 I/O ST
RD10 445670D11I/OST
RD11 455771C11I/OST
RD12 — 64 79 A9 I/O ST
RD13 — 65 80 D8 I/O ST
RD14 — 37 47 L9 I/O ST
RD15 — 38 48 K9 I/O ST
TABLE 1-4: PIC24FJ128GA310 FAMILY PINOUT DESCRIPTIONS (CONTINUED)
Pin
Function
Pin Numbe r/Grid Locator
I/O Input
Buffer Description
64-Pin
TQFP 80-Pin
TQFP 100-Pin
TQFP 121-Pin
BGA
Legend: TTL = TTL input buffer ST = Schmitt Trigger input buffer
ANA = Analog level input/output I2C™ = I2C/SMBus input buffer
PIC24FJ128GA310 FAMILY
PIC24FJDS39996F-page 24 2010-2011 Microchip Technology Inc.
RE0 60 76 93 A4 I/O ST PORTE Digital I/O.
RE1 617794B4I/OST
RE2 627898B3I/OST
RE3 637999A2I/OST
RE4 64 80 100 A1 I/O ST
RE5 1 1 3 D3 I/O ST
RE6 2 2 4 C1 I/O ST
RE7 3 3 5 D2 I/O ST
RE8 — 13 18 G1 I/O ST
RE9 — 14 19 G2 I/O ST
REFO 30 36 44 L8 O — Reference Clock Output.
RF0 587287B6I/OST
PORTF Digital I/O.
RF1 597388A6I/OST
RF2 344252K11I/OST
RF3 334151K10I/OST
RF4 313949L10I/OST
RF5 324050L11I/OST
RF6 354555H9I/OST
RF7 — 44 54 H8 I/O ST
RF8 — 43 53 J10 I/O ST
RF12 — — 40 K6 I/O ST PORTG Digital I/O.
RF13 — — 39 L6 I/O ST
RG0 — 75 90 A5 I/O ST
RG1 — 74 89 E6 I/O ST
RG2 374757H10I/OST
RG3 364656J11I/OST
RG6 4 6 10 E3 I/O ST
RG7 5 7 11 F4 I/O ST
RG8 6 8 12 F2 I/O ST
RG9 8 10 14 F3 I/O ST
RG12 — — 96 C3 I/O ST
RG13 — — 97 A3 I/O ST
RG14 — — 95 C4 I/O ST
RG15 — — 1 B2 I/O ST
TABLE 1-4: PIC24FJ128GA310 FAMILY PINOUT DESCRIPTIONS (CONTINUED)
Pin
Function
Pin Numbe r/Grid Locator
I/O Input
Buffer Description
64-Pin
TQFP 80-Pin
TQFP 100-Pin
TQFP 121-Pin
BGA
Legend: TTL = TTL input buffer ST = Schmitt Trigger input buffer
ANA = Analog level input/output I2C™ = I2C/SMBus input buffer
2010-2011 Microchip Technology Inc. DS39996F-page 25
PIC24FJ128GA310 FAMILY
RP0 16 20 25 K2 I/O ST Remappable Peripheral (input or output).
RP1 151924K1I/OST
RP2 425468E9I/OST
RP3 445670D11I/OST
RP4 435569E10I/OST
RP5 — 38 48 K9 I/O ST
RP6 172126L1I/OST
RP7 182227J3I/OST
RP8 212732K4I/OST
RP9 222833L4I/OST
RP10 31 39 49 L10 I/O ST
RP11 46 58 72 D9 I/O ST
RP12 45 57 71 C11 I/O ST
RP13 14 18 23 J2 I/O ST
RP14 29 35 43 K7 I/O ST
RP15 — 43 53 J10 I/O ST
RP16 33 41 51 K10 I/O ST
RP17 32 40 50 L11 I/O ST
RP18 11 15 20 H1 I/O ST
RP19 6 8 12 F2 I/O ST
RP20 53 67 82 B8 I/O ST
RP21 4 6 10 E3 I/O ST
RP22 51 63 78 B9 I/O ST
RP23 50 62 77 A10 I/O ST
RP24 49 61 76 A11 I/O ST
RP25 52 66 81 C8 I/O ST
RP26 5 7 11 F4 I/O ST
RP27 8 10 14 F3 I/O ST
RP28 12 16 21 H2 I/O ST
RP29 30 36 44 L8 I/O ST
RP30 34 42 52 K11 I/O ST
RP31 — — 39 L6 I/O ST
RPI32 — — 40 K6 I ST Remappable Peripheral (input only).
RPI33 — 13 18 G1 I ST
RPI34 — 14 19 G2 I ST
RPI35 — 53 67 E8 I ST
RPI36 — 52 66 E11 I ST
RPI37 486074B11IST
RPI38 — 4 6 D1 I ST
RPI39 — — 7 E4 I ST
RPI40 — 5 8 E2 I ST
RPI41 — — 9 E1 I ST
RPI42 — 64 79 A9 I ST
RPI43 — 37 47 L9 I ST
TABLE 1-4: PIC24FJ128GA310 FAMILY PINOUT DESCRIPTIONS (CONTINUED)
Pin
Function
Pin Numbe r/Grid Locator
I/O Input
Buffer Description
64-Pin
TQFP 80-Pin
TQFP 100-Pin
TQFP 121-Pin
BGA
Legend: TTL = TTL input buffer ST = Schmitt Trigger input buffer
ANA = Analog level input/output I2C™ = I2C/SMBus input buffer
PIC24FJ128GA310 FAMILY
PIC24FJDS39996F-page 26 2010-2011 Microchip Technology Inc.
RTCC 42 54 68 E9 O — Real-Time Clock Alarm/Seconds Pulse Output.
SCL1 37 47 57 H10 I/O I2C I2C1 Synchronous Serial Clock Input/Output.
SCL2 32 40 58 H11 I/O I2C I2C2 Synchronous Serial Clock Input/Output.
SCLKI 486074B11
SDA1 36 46 56 J11 I/O I2C I2C1 Data Input/Output.
SDA2 31 39 59 G10 I/O I2C I2C2 Data Input/Output.
SEG0 4 6 10 E3 O — LCD Driver Segment Outputs.
SEG1 8 10 14 F3 O —
SEG2 11 15 20 H1 O —
SEG3 12 16 21 H2 O —
SEG4 13 17 22 J1 O —
SEG5 14 18 23 J2 O —
SEG6 15 19 24 K1 O —
SEG7 16 20 25 K2 O —
SEG8 29 35 43 K7 O —
SEG9 30 36 44 L8 O —
SEG10 313949L10O—
SEG11 324050L11O—
SEG12 334151K10O—
SEG13 425468E9O—
SEG14 435569E10O—
SEG15 445670D11O—
SEG16 455771C11O—
SEG17 465872D9O—
SEG18 273341J7O—
SEG19 283442L7O—
SEG20 496176A11O—
SEG21 506277A10O—
SEG22 516378B9O—
SEG23 526681C8O—
SEG24 536782B8O—
SEG25 546883D7O—
SEG26 556984C7O—
SEG27 587287B6O—
SEG28 374757H10O—
SEG29 232934L5O—
SEG30 222833L4O—
SEG31 212732K4O—
SEG32 — 4 6 D1 O —
SEG33 — 5 8 E2 O —
SEG34 — 13 18 G1 O —
TABLE 1-4: PIC24FJ128GA310 FAMILY PINOUT DESCRIPTIONS (CONTINUED)
Pin
Function
Pin Numbe r/Grid Locator
I/O Input
Buffer Description
64-Pin
TQFP 80-Pin
TQFP 100-Pin
TQFP 121-Pin
BGA
Legend: TTL = TTL input buffer ST = Schmitt Trigger input buffer
ANA = Analog level input/output I2C™ = I2C/SMBus input buffer
2010-2011 Microchip Technology Inc. DS39996F-page 27
PIC24FJ128GA310 FAMILY
SEG35 — 14 19 G2 O — LCD Driver Segment Outputs.
SEG36 — 23 28 L2 O —
SEG37 — 24 29 K3 O —
SEG38 — 37 47 L9 O —
SEG39 — 38 48 K9 O —
SEG40 — 42 52 K11 O —
SEG41 — 43 53 J10 O —
SEG42 — 52 66 E11 O —
SEG43 — 53 67 E8 O —
SEG44 — 64 79 A9 O —
SEG45 — 65 80 D8 O —
SEG46 — 74 89 E6 O —
SEG47 364656J11O—
SEG48 597388A6O—
SEG49 — — 17G3O —
SEG50 — 75 90 A5 O —
SEG51 — — 1 B2 O —
SEG52 — — 7 E4 O —
SEG53 — — 9 E1 O —
SEG54 — — 39 L6 O —
SEG55 — — 40 K6 O —
SEG56 — — 58 H11 O —
SEG57 — — 59 G10 O —
SEG58 — — 91C5O—
SEG59 — — 92 B5 O —
SEG60 — — 95C4O—
SEG61 — — 96C3O—
SEG62 — — 97 A3 O —
SEG63 — — 100 A1 O —
SOSCI 47 59 73 C10 I ANA Secondary Oscillator/Timer1 Clock Input.
SOSCO 48 60 74 B11 O ANA Secondary Oscillator/Timer1 Clock Output.
T1CK 22 28 33 L4 I ST Timer1 Clock.
TCK 27 33 38 J6 I ST JTAG Test Clock/Programming Clock Input.
TDI 28 34 60 G11 I ST JTAG Test Data/Programming Data Input.
TDO 24 14 61 G9 O — JTAG Test Data Output.
TMS 23 13 17 G3 I ST JTAG Test Mode Select Input.
TABLE 1-4: PIC24FJ128GA310 FAMILY PINOUT DESCRIPTIONS (CONTINUED)
Pin
Function
Pin Numbe r/Grid Locator
I/O Input
Buffer Description
64-Pin
TQFP 80-Pin
TQFP 100-Pin
TQFP 121-Pin
BGA
Legend: TTL = TTL input buffer ST = Schmitt Trigger input buffer
ANA = Analog level input/output I2C™ = I2C/SMBus input buffer
PIC24FJ128GA310 FAMILY
PIC24FJDS39996F-page 28 2010-2011 Microchip Technology Inc.
VBAT 57 71 86 A7 P — Back-up Battery.
VCAP 56 70 85 B7 P — External Filter Capacitor Connection (regulator
enabled).
VDD 10, 26,
38
12, 32,
48
2, 16,
37, 46,
62
C2, F8,
G5, H6,
K8
P — Positive Supply for Peripheral Digital Logic and I/O
Pins.
VLCAP1 5 7 11 F4 I ANA LCD Drive Charge Pump Capacitor Inputs.
VLCAP26812F2IANA
VREF+ — 24 29 K3 I ANA Comparator/A/D Reference Voltage (low) Input
(default).
VREF- — 23 28 L2 I ANA Comparator/A/D Reference Voltage (high) Input
(default).
Vss 9, 25, 41 11, 31,
51
15, 36,
45, 65,
75
B10, F5,
F10, G6,
G7
P — Ground Reference for Logic and I/O Pins.
TABLE 1-4: PIC24FJ128GA310 FAMILY PINOUT DESCRIPTIONS (CONTINUED)
Pin
Function
Pin Numbe r/Grid Locator
I/O Input
Buffer Description
64-Pin
TQFP 80-Pin
TQFP 100-Pin
TQFP 121-Pin
BGA
Legend: TTL = TTL input buffer ST = Schmitt Trigger input buffer
ANA = Analog level input/output I2C™ = I2C/SMBus input buffer
2010-2011 Microchip Technology Inc. DS39996F-page 29
PIC24FJ128GA310 FAMILY
2.0 GUIDELINES FOR GETTING
STARTED WITH 16-BIT
MICROCONTROLLERS
2.1 Basic Connection Requirements
Getting started with the PIC24FJ128GA310 family
family of 16-bit microcontrollers requires attention to a
minimal set of device pin connections before
proceeding with development.
The following pins must always be connected:
•All V
DD and VSS pins
(see Section 2.2 “Power Supply Pins”)
•All AV
DD and AVSS pins, regardless of whether or
not the analog device features are used
(see Section 2.2 “Power Supply Pins”)
•MCLR
pin
(see Section 2.3 “Master Clear (MCLR) Pin”)
•V
CAP pin
(see Section 2.4 “Voltage Regulator Pin (VCAP)”)
These pins must also be connected if they are being
used in the end application:
• PGECx/PGEDx pins used for In-Circuit Serial
Programming™ (ICSP™) and debugging purposes
(see Section 2.5 “ICSP Pins”)
• OSCI and OSCO pins when an external oscillator
source is used
(see Section 2.6 “External Oscillator Pins”)
Additionally, the following pins may be required:
•V
REF+/VREF- pins used when external voltage
reference for analog modules is implemented
The minimum mandatory connections are shown in
Figure 2-1.
FIGURE 2-1: RECOMMENDED
MINIMUM CONNECTIONS
Note: The AVDD and AVSS pins must always be
connected, regardless of whether any of
the analog modules are being used.
PIC24FJXXXX
VDD
VSS
VDD
VSS
VSS
VDD
AVDD
AVSS
VDD
VSS
C1
R1
VDD
MCLR VCAP
R2
C7
C2(2)
C3(2)
C4(2)
C5(2)
C6(2)
Key (all values are recommendations):
C1 through C6: 0.1 F, 20V ceramic
C7: 10 F, 6.3V or greater, tantalum or ceramic
R1: 10 kΩ
R2: 100Ω to 470Ω
Note 1: See Secti on 2.4 “Voltage Regulator Pin
(VCAP)” for details on selecting the proper
capacitor for Vcap.
2: The example shown is for a PIC24F device
with five VDD/VSS and AVDD/AVSS pairs.
Other devices may have more or less pairs;
adjust the number of decoupling capacitors
appropriately.
(1)
PIC24FJ128GA310 FAMILY
DS39996F-page 30 2010-2011 Microchip Technology Inc.
2.2 Power Supply Pins
2.2.1 DECOUPLING CAPACITORS
The use of decoupling capacitors on every pair of
power supply pins, such as VDD, VSS, AVDD and
AVSS is required.
Consider the following criteria when using decoupling
capacitors:
•Value and type of capacitor: A 0.1 F (100 nF),
10-20V capacitor is recommended. The capacitor
should be a low-ESR device with a resonance
frequency in the range of 200 MHz and higher.
Ceramic capacitors are recommended.
•Placement on the printed circuit board: The
decoupling capacitors should be placed as close
to the pins as possible. It is recommended to
place the capacitors on the same side of the
board as the device. If space is constricted, the
capacitor can be placed on another layer on the
PCB using a via; however, ensure that the trace
length from the pin to the capacitor is no greater
than 0.25 inch (6 mm).
•Handling high-frequency noise: If the board is
experiencing high-frequency noise (upward of
tens of MHz), add a second ceramic type capaci-
tor in parallel to the above described decoupling
capacitor. The value of the second capacitor can
be in the range of 0.01 F to 0.001 F. Place this
second capacitor next to each primary decoupling
capacitor. In high-speed circuit designs, consider
implementing a decade pair of capacitances as
close to the power and ground pins as possible
(e.g., 0.1 F in parallel with 0.001 F).
•Maximizing performance: On the board layout
from the power supply circuit, run the power and
return traces to the decoupling capacitors first,
and then to the device pins. This ensures that the
decoupling capacitors are first in the power chain.
Equally important is to keep the trace length
between the capacitor and the power pins to a
minimum, thereby reducing PCB trace
inductance.
2.2.2 TANK CAPACITORS
On boards with power traces running longer than six
inches in length, it is suggested to use a tank capacitor
for integrated circuits including microcontrollers to
supply a local power source. The value of the tank
capacitor should be determined based on the trace
resistance that connects the power supply source to
the device, and the maximum current drawn by the
device in the application. In other words, select the tank
capacitor so that it meets the acceptable voltage sag at
the device. Typical values range from 4.7 F to 47 F.
2.3 Master Clear (MCLR) Pin
The MCLR pin provides two specific device
functions: device Reset, and device programming
and debugging. If programming and debugging are
not required in the end application, a direct
connection to VDD may be all that is required. The
addition of other components, to help increase the
application’s resistance to spurious Resets from
voltage sags, may be beneficial. A typical
configuration is shown in Figure 2-1. Other circuit
designs may be implemented, depending on the
application’s requirements.
During programming and debugging, the resistance
and capacitance that can be added to the pin must
be considered. Device programmers and debuggers
drive the MCLR pin. Consequently, specific voltage
levels (VIH and VIL) and fast signal transitions must
not be adversely affected. Therefore, specific values
of R1 and C1 will need to be adjusted based on the
application and PCB requirements. For example, it is
recommended that the capacitor, C1, be isolated
from the MCLR pin during programming and
debugging operations by using a jumper (Figure 2-2).
The jumper is replaced for normal run-time
operations.
Any components associated with the MCLR pin
should be placed within 0.25 inch (6 mm) of the pin.
FIGURE 2-2: EXAMPLE OF MCLR PIN
CONNECTIONS
Note 1: R1 10 k is recommended. A suggested
starting value is 10 k. Ensure that the
MCLR pin VIH and VIL specifications are met.
2: R2 470 will limit any current flowing into
MCLR from the external capacitor, C, in the
event of MCLR pin breakdown, due to
Electrostatic Discharge (ESD) or Electrical
Overstress (EOS). Ensure that the MCLR pin
VIH and VIL specifications are met.
C1
R2
R1
VDD
MCLR
PIC24FXXXX
JP
2010-2011 Microchip Technology Inc. DS39996F-page 31
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2.4 Vol tage Regulator Pin (VCAP)
A low-ESR (< 5Ω) capacitor is required on the VCAP pin
to stabilize the output voltage of the on-chip voltage
regulator . The VCAP pin must not be connected to VDD
and must use a capacitor of 10 µF connected to ground.
The type can be ceramic or tantalum. Suitable examples
of capacitors are shown in Table 2-1. Capacitors with
equivalent specification can be used.
The placement of this capacitor should be close to
VCAP. It is recommended that the trace length not
exceed 0.25 inch (6 mm). Refer to Section 32.0
“Electrical Characteristics” for additional
information.
Designers may use Figure 2-3 to evaluate ESR
equivalence of candidate devices.
Refer to Section 29.2 “On-Chip Voltage Regulator”
for details on connecting and using the on-chip
regulator.
FIGURE 2-3: FREQUENCY vs. ESR
PERFORMANCE FOR
SUGGESTED VCAP
.
10
1
0.1
0.01
0.001 0.01 0.1 1 10 100 1000 10,000
Frequ en cy (MH z)
ESR ()
Note: Typical data measurement at 25°C, 0V DC bias.
TABLE 2-1: SUITABLE CAPACITOR EQUIVALENTS
Make Part # Nominal
Capacitance Base Tolerance Rated Voltage Temp. Range
TDK C3216X7R1C106K 10 µF ±10% 16V -55 to 125ºC
TDK C3216X5R1C106K 10 µF ±10% 16V -55 to 85ºC
Panasonic ECJ-3YX1C106K 10 µF ±10% 16V -55 to 125ºC
Panasonic ECJ-4YB1C106K 10 µF ±10% 16V -55 to 85ºC
Murata GRM32DR71C106KA01L 10 µF ±10% 16V -55 to 125ºC
Murata GRM31CR61C106KC31L 10 µF ±10% 16V -55 to 85ºC
PIC24FJ128GA310 FAMILY
DS39996F-page 32 2010-2011 Microchip Technology Inc.
2.4.1 CONSIDERATIONS FOR CERAMIC
CAPACITORS
In recent years, large value, low-voltage, surface-mount
ceramic capacitors have become very cost effective in
sizes up to a few tens of microfarad. The low-ESR, small
physical size and other properties make ceramic
capacitors very attractive in many types of applications.
Ceramic capacitors are suitable for use with the inter-
nal voltage regulator of this microcontroller. However,
some care is needed in selecting the capacitor to
ensure that it maintains sufficient capacitance over the
intended operating range of the application.
Typical low-cost, 10 F ceramic capacitors are available
in X5R, X7R and Y5V dielectric ratings (other types are
also available, but are less common). The initial toler-
ance specifications for these types of capacitors are
often specified as ±10% to ±20% (X5R and X7R), or
-20%/+80% (Y5V). However, the effective capacitance
that these capacitors provide in an application circuit will
also vary based on additional factors, such as the
applied DC bias voltage and the temperature. The total
in-circuit tolerance is, therefore, much wider than the
initial tolerance specification.
The X5R and X7R capacitors typically exhibit satisfac-
tory temperature stability (ex: ±15% over a wide
temperature range, but consult the manufacturer’s data
sheets for exact specifications). However, Y5V capaci-
tors typically have extreme temperature tolerance
specifications of +22%/-82%. Due to the extreme tem-
perature tolerance, a 10 F nominal rated Y5V type
capacitor may not deliver enough total capacitance to
meet minimum internal voltage regulator stability and
transient response requirements. Therefore, Y5V
capacitors are not recommended for use with the
internal regulator if the application must operate over a
wide temperature range.
In addition to temperature tolerance, the effective
capacitance of large value ceramic capacitors can vary
substantially, based on the amount of DC voltage
applied to the capacitor. This effect can be very signifi-
cant, but is often overlooked or is not always
documented.
Typical DC bias voltage vs. capacitance graph for X7R
type capacitors is shown in Figure 2-4.
FIGURE 2-4: DC BIAS VOLTAGE vs.
CAPACITANCE
CHARACTERISTICS
When selecting a ceramic capacitor to be used with the
internal voltage regulator, it is suggested to select a
high-voltage rating, so that the operating voltage is a
small percentage of the maximum rated capacitor volt-
age. For example, choose a ceramic capacitor rated at
16V for the 2.5V or 1.8V core voltage. Suggested
capacitors are shown in Table 2-1.
2.5 ICSP Pins
The PGECx and PGEDx pins are used for In-Circuit
Serial Programming (ICSP) and debugging purposes.
It is recommended to keep the trace length between
the ICSP connector and the ICSP pins on the device as
short as possible. If the ICSP connector is expected to
experience an ESD event, a series resistor is recom-
mended, with the value in the range of a few tens of
ohms, not to exceed 100Ω.
Pull-up resistors, series diodes and capacitors on the
PGECx and PGEDx pins are not recommended as they
will interfere with the programmer/debugger communi-
cations to the device. If such discrete components are
an application requirement, they should be removed
from the circuit during programming and debugging.
Alternatively, refer to the AC/DC characteristics and
timing requirements information in the respective
device Flash programming specification for information
on capacitive loading limits and pin input voltage high
(VIH) and input low (VIL) requirements.
For device emulation, ensure that the “Communication
Channel Select” (i.e., PGECx/PGEDx pins),
programmed into the device, matches the physical
connections for the ICSP to the Microchip
debugger/emulator tool.
For more information on available Microchip
development tools connection requirements, refer to
Section 30.0 “Development Support”.
-80
-70
-60
-50
-40
-30
-20
-10
0
10
5 1011121314151617
DC Bias Voltage (VDC)
Capacitance Change (%)
01234 6789
16V Capacitor
10V Capacitor
6.3V Capacitor
2010-2011 Microchip Technology Inc. DS39996F-page 33
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2.6 External Oscillator Pins
Many microcontrollers have options for at least two
oscillators: a high-frequency primary oscillator and a
low-frequency secondary oscillator (refer to
Section 9.0 “Oscillator Configuration” for details).
The oscillator circuit should be placed on the same
side of the board as the device. Place the oscillator
circuit close to the respective oscillator pins with no
more than 0.5 inch (12 mm) between the circuit
components and the pins. The load capacitors should
be placed next to the oscillator itself, on the same side
of the board.
Use a grounded copper pour around the oscillator cir-
cuit to isolate it from surrounding circuits. The
grounded copper pour should be routed directly to the
MCU ground. Do not run any signal traces or power
traces inside the ground pour. Also, if using a two-sided
board, avoid any traces on the other side of the board
where the crystal is placed.
Layout suggestions are shown in Figure 2-5. In-line
packages may be handled with a single-sided layout
that completely encompasses the oscillator pins. With
fine-pitch packages, it is not always possible to com-
pletely surround the pins and components. A suitable
solution is to tie the broken guard sections to a mirrored
ground layer. In all cases, the guard trace(s) must be
returned to ground.
In planning the application’s routing and I/O assign-
ments, ensure that adjacent port pins, and other
signals in close proximity to the oscillator, are benign
(i.e., free of high frequencies, short rise and fall times
and other similar noise).
For additional information and design guidance on
oscillator circuits, please refer to these Microchip
Application Notes, available at the corporate web site
(www.microchip.com):
• AN826, “Crystal Oscillator Basics and Crystal
Selection for rfPIC™ and PICmicro® Devices”
• AN849, “Basic PICmicro® Oscillator Design”
• AN943, “Practical PICmicro® Oscillator Analysis
and Design”
•AN949, “Ma king Your Osci llator Work”
FIGURE 2-5: SUGGESTED
PLACEMENT OF THE
OSCILLATOR CIRCUIT
GND
`
`
`
OSCI
OSCO
SOSCO
SOSC I
Copper Pour Primary Oscillator
Crystal
Secondary
Crystal
DEVICE PINS
Primary
Oscillator
C1
C2
Sec Oscillator: C1 Sec Oscillator: C2
(tied to ground)
GND
OSCO
OSCI
Bottom Layer
Copper Pour
Oscillator
Crystal
Top Layer Copper Pour
C2
C1
DEVICE PINS
(tied to ground)
(tied to ground)
Single-Sided and In-line Layou ts:
Fine-Pitch (Dual-Sided) Layouts:
Oscillator
PIC24FJ128GA310 FAMILY
DS39996F-page 34 2010-2011 Microchip Technology Inc.
2.7 Configuration of Analog and
Digital Pins During ICSP
Operations
If an ICSP compliant emulator is selected as a debug-
ger, it automatically initializes all of the A/D input pins
(ANx) as “digital” pins. Depending on the particular
device, this is done by setting all bits in the ADnPCFG
register(s), or clearing all bit in the ANSx registers.
All PIC24F devices will have either one or more
ADnPCFG registers or several ANSx registers (one for
each port); no device will have both. Refer to
Section 11.2 “Configuring Analog Port Pins
(ANSx)” for more specific information.
The bits in these registers that correspond to the A/D
pins that initialized the emulator must not be changed
by the user application firmware; otherwise,
communication errors will result between the debugger
and the device.
If your application needs to use certain A/D pins as
analog input pins during the debug session, the user
application must modify the appropriate bits during
initialization of the A/D module, as follows:
• For devices with an ADnPCFG register, clear the
bits corresponding to the pin(s) to be configured
as analog. Do not change any other bits, particu-
larly those corresponding to the PGECx/PGEDx
pair, at any time.
• For devices with ANSx registers, set the bits
corresponding to the pin(s) to be configured as
analog. Do not change any other bits, particularly
those corresponding to the PGECx/PGEDx pair,
at any time.
When a Microchip debugger/emulator is used as a
programmer, the user application firmware must
correctly configure the ADnPCFG or ANSx registers.
Automatic initialization of this register is only done
during debugger operation. Failure to correctly
configure the register(s) will result in all A/D pins being
recognized as analog input pins, resulting in the port
value being read as a logic ‘0’, which may affect user
application functionality.
2.8 Unused I/Os
Unused I/O pins should be configured as outputs and
driven to a logic low state. Alternatively, connect a 1 kΩ
to 10 kΩ resistor to VSS on unused pins and drive the
output to logic low.
2010-2011 Microchip Technology Inc. DS39996F-page 35
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3.0 CPU
The PIC24F CPU has a 16-bit (data) modified Harvard
architecture with an enhanced instruction set and a
24-bit instruction word with a variable length opcode
field. The Program Counter (PC) is 23 bits wide and
addresses up to 4M instructions of user program
memory space. A single-cycle instruction prefetch
mechanism is used to help maintain throughput and
provides predictable execution. All instructions execute
in a single cycle, with the exception of instructions that
change the program flow, the double-word move
(MOV.D) instruction and the table instructions.
Overhead-free program loop constructs are supported
using the REPEAT instructions, which are interruptible
at any point.
PIC24F devices have sixteen, 16-bit working registers
in the programmer’s model. Each of the working
registers can act as a data, address or address offset
register. The 16th working register (W15) operates as a
Software Stack Pointer for interrupts and calls.
The lower 32 Kbytes of the data space can be
accessed linearly. The upper 32 Kbytes of the data
space are referred to as extended data space to which
the extended data RAM, EPMP memory space or
program memory can be mapped.
The Instruction Set Architecture (ISA) has been
significantly enhanced beyond that of the PIC18, but
maintains an acceptable level of backward compatibil-
ity. All PIC18 instructions and addressing modes are
supported, either directly, or through simple macros.
Many of the ISA enhancements have been driven by
compiler efficiency needs.
The core supports Inherent (no operand), Relative,
Literal and Memory Direct Addressing modes, along
with three other groups of addressing modes. All
modes support Register Direct and various Register
Indirect modes. Each group offers up to seven
addressing modes. Instructions are associated with
predefined addressing modes depending upon their
functional requirements.
For most instructions, the core is capable of executing
a data (or program data) memory read, a working reg-
ister (data) read, a data memory write and a program
(instruction) memory read per instruction cycle. As a
result, three parameter instructions can be supported,
allowing trinary operations (that is, A + B = C) to be
executed in a single cycle.
A high-speed, 17-bit x 17-bit multiplier has been
included to significantly enhance the core arithmetic
capability and throughput. The multiplier supports
Signed, Unsigned and Mixed mode, 16-bit x 16-bit or
8-bit x 8-bit, integer multiplication. All multiply
instructions execute in a single cycle.
The 16-bit ALU has been enhanced with integer divide
assist hardware that supports an iterative non-restoring
divide algorithm. It operates in conjunction with the
REPEAT instruction looping mechanism and a selection
of iterative divide instructions to support 32-bit (or
16-bit), divided by 16-bit, integer signed and unsigned
division. All divide operations require 19 cycles to
complete but are interruptible at any cycle boundary.
The PIC24F has a vectored exception scheme with up
to 8 sources of non-maskable traps and up to 118 inter-
rupt sources. Each interrupt source can be assigned to
one of seven priority levels.
A block diagram of the CPU is shown in Figure 3-1.
3.1 Programmer’s Model
The programmer’s model for the PIC24F is shown in
Figure 3-2. All registers in the programmer’s model are
memory mapped and can be manipulated directly by
instructions. A description of each register is provided
in Ta b l e 3 - 1 . All registers associated with the
programmer’s model are memory mapped.
Note: This data sheet summarizes the features of
this group of PIC24F devices. It is not
intended to be a comprehensive reference
source. For more information, refer to the
“PIC24F Family Reference Manual”,
Section 44. “CPU with Extended Data
Sp ace (EDS)” (DS39732). The information
in this data sheet supersedes the
information in the FRM.
PIC24FJ128GA310 FAMILY
DS39996F-page 36 2010-2011 Microchip Technology Inc.
FIGURE 3-1: PIC24F CPU CORE BLOCK DIAGRAM
TABLE 3-1: CPU CORE REGISTERS
Register(s) Name Description
W0 through W15 Working Register Array
PC 23-Bit Program Counter
SR ALU STATUS Register
SPLIM Stack Pointer Limit Value Register
TBLPAG Table Memory Page Address Register
RCOUNT Repeat Loop Counter Register
CORCON CPU Control Register
DISICNT Disable Interrupt Count Register
DSRPAG Data Space Read Page Register
DSWPAG Data Space Write Page Register
Instruction
Decode and
Control
PCH PCL
16
Program Counter
16-Bit ALU
23
23
24
23
Data Bus
Instruction Reg
16
16 x 16
W Register Array
Divide
Support
ROM Latch
16
EA MUX
RAGU
WAGU
16
16
8
Interrupt
Controller
EDS and Table
Data Access
Control Block
Stack
Control
Logic
Loop
Control
Logic
Data Latch
Data RAM
Address
Latch
Control Signals
to Various Blocks
Program Memory/
Data Latch
Address Bus
16
Literal Data
16 16
Hardware
Multiplier
16
To Peripheral Modules
Address Latch
Up to 0x7FFF
Extended Data
Space
2010-2011 Microchip Technology Inc. DS39996F-page 37
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FIGURE 3-2: PROGRAMMER’S MODEL
N OV Z C
TBLPAG
22 0
7 0
015
Program Counter
Table Memory Page
ALU STATUS Register (SR)
Working/Address
Registers
W0 (WREG)
W1
W2
W3
W4
W5
W6
W7
W8
W9
W10
W11
W12
W13
Frame Pointer
Stack Pointer
RA
0
RCOUNT
15 0 Repeat Loop Counter
SPLIM Stack Pointer Limit
SRL
0
0
15 0
CPU Control Register (CORCON)
SRH
W14
W15
DC IPL
210
———————
PC
Divider Working Registers
Multiplier Registers
15 0
Value Register
Address Register
Register
Data Space Read Page Register
Data Space Write Page Register
Disable Interrupt Count Register
13 0
DISICNT
90
DSRPAG
80
DSWPAG
IPL3———————————— ———
Registers or bits are shadowed for PUSH.S and POP.S instructions.
PIC24FJ128GA310 FAMILY
DS39996F-page 38 2010-2011 Microchip Technology Inc.
3.2 CPU Control Registers
REGISTER 3-1: SR: ALU STATUS REGISTER
U-0 U-0 U-0 U-0 U-0 U-0 U-0 R/W-0
— — — — — — —DC
bit 15 bit 8
R/W-0(1)R/W-0(1)R/W-0(1)R-0 R/W-0 R/W-0 R/W-0, R/W-0
IPL2(2)IPL1(2)IPL0(2)RA N OV Z C
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-9 Unimplemented: Read as ‘0’
bit 8 DC: ALU Half Carry/Borrow bit
1 = A carry out from the 4th low-order bit (for byte-sized data) or 8th low-order bit (for word-sized data)
of the result occurred
0 = No carry out from the 4th or 8th low-order bit of the result has occurred
bit 7-5 IPL<2:0>: CPU Interrupt Priority Level Status bits(1,2)
111 = CPU interrupt priority level is 7 (15); user interrupts are disabled
110 = CPU interrupt priority level is 6 (14)
101 = CPU interrupt priority level is 5 (13)
100 = CPU interrupt priority level is 4 (12)
011 = CPU interrupt priority level is 3 (11)
010 = CPU interrupt priority level is 2 (10)
001 = CPU interrupt priority level is 1 (9)
000 = CPU interrupt priority level is 0 (8)
bit 4 RA: REPEAT Loop Active bit
1 = REPEAT loop in progress
0 = REPEAT loop not in progress
bit 3 N: ALU Negative bit
1 = Result was negative
0 = Result was not negative (zero or positive)
bit 2 OV: ALU Overflow bit
1 = Overflow occurred for signed (2’s complement) arithmetic in this arithmetic operation
0 = No overflow has occurred
bit 1 Z: ALU Zero bit
1 = An operation, which affects the Z bit, has set it at some time in the past
0 = The most recent operation, which affects the Z bit, has cleared it (i.e., a non-zero result)
bit 0 C: ALU Carry/Borrow bit
1 = A carry out from the Most Significant bit of the result occurred
0 = No carry out from the Most Significant bit of the result occurred
Note 1: The IPL Status bits are read-only when NSTDIS (INTCON1<15>) = 1.
2: The IPL Status bits are concatenated with the IPL3 (CORCON<3>) bit to form the CPU Interrupt Priority
Level (IPL). The value in parentheses indicates the IPL when IPL3 = 1.
2010-2011 Microchip Technology Inc. DS39996F-page 39
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REGISTER 3-2: CORCON: CPU CORE CONTROL REGISTER
U-0 U-0 U-0 U-0 U-0 U-0 U-0 U-0
— — — — — — — —
bit 15 bit 8
U-0 U-0 U-0 U-0 R/C-0 R-1 U-0 U-0
————IPL3
(1)r — —
bit 7 bit 0
Legend: C = Clearable bit r = Reserved bit
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-4 Unimplemented: Read as ‘0’
bit 3 IPL3: CPU Interrupt Priority Level Status bit(1)
1 = CPU interrupt priority level is greater than 7
0 = CPU interrupt priority level is 7 or less
bit 2 Reserved: Read as ‘1’
bit 1-0 Unimplemented: Read as ‘0’
Note 1: The IPL3 bit is concatenated with the IPL<2:0> bits (SR<7:5>) to form the CPU interrupt priority level; see
Register 3-1 for bit description.
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DS39996F-page 40 2010-2011 Microchip Technology Inc.
3.3 Arithmetic Logic Unit (ALU)
The PIC24F ALU is 16 bits wide and is capable of addi-
tion, subtraction, bit shifts and logic operations. Unless
otherwise mentioned, arithmetic operations are 2’s
complement in nature. Depending on the operation, the
ALU may affect the values of the Carry (C), Zero (Z),
Negative (N), Overflow (OV) and Digit Carry (DC)
Status bits in the SR register. The C and DC Status bits
operate as Borrow and Digit Borrow bits, respectively,
for subtraction operations.
The ALU can perform 8-bit or 16-bit operations,
depending on the mode of the instruction that is used.
Data for the ALU operation can come from the W
register array, or data memory, depending on the
addressing mode of the instruction. Likewise, output
data from the ALU can be written to the W register array
or a data memory location.
The PIC24F CPU incorporates hardware support for
both multiplication and division. This includes a
dedicated hardware multiplier and support hardware
for 16-bit divisor division.
3.3.1 MULTIPLIER
The ALU contains a high-speed, 17-bit x 17-bit
multiplier. It supports unsigned, signed or mixed sign
operation in several multiplication modes:
1. 16-bit x 16-bit signed
2. 16-bit x 16-bit unsigned
3. 16-bit signed x 5-bit (literal) unsigned
4. 16-bit unsigned x 16-bit unsigned
5. 16-bit unsigned x 5-bit (literal) unsigned
6. 16-bit unsigned x 16-bit signed
7. 8-bit unsigned x 8-bit unsigned
3.3.2 DIVIDER
The divide block supports signed and unsigned integer
divide operations with the following data sizes:
1. 32-bit signed/16-bit signed divide
2. 32-bit unsigned/16-bit unsigned divide
3. 16-bit signed/16-bit signed divide
4. 16-bit unsigned/16-bit unsigned divide
The quotient for all divide instructions ends up in W0
and the remainder in W1. Sixteen-bit signed and
unsigned DIV instructions can specify any W register
for both the 16-bit divisor (Wn), and any W register
(aligned) pair (W(m + 1):Wm) for the 32-bit dividend.
The divide algorithm takes one cycle per bit of divisor,
so both 32-bit/16-bit and 16-bit/16-bit instructions take
the same number of cycles to execute.
3.3.3 MULTI-BIT SHIFT SUPPORT
The PIC24F ALU supports both single bit and
single-cycle, multi-bit arithmetic and logic shifts.
Multi-bit shifts are implemented using a shifter block,
capable of performing up to a 15-bit arithmetic right
shift, or up to a 15-bit left shift, in a single cycle. All
multi-bit shift instructions only support Register Direct
Addressing for both the operand source and result
destination.
A full summary of instructions that use the shift
operation is provided in Table 3-2.
TABLE 3-2: INSTRUCTIONS THAT USE THE SINGLE BIT AND MULTI-BIT SHIFT OPERATION
Instruction Description
ASR Arithmetic shift right source register by one or more bits.
SL Shift left source register by one or more bits.
LSR Logical shift right source register by one or more bits.
2010-2011 Microchip Technology Inc. DS39996F-page 41
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4.0 MEMORY ORGANIZATION
As Harvard architecture devices, PIC24F micro-
controllers feature separate program and data memory
spaces and busses. This architecture also allows direct
access of program memory from the data space during
code execution.
4.1 Program Memory Space
The program address memory space of the
PIC24FJ128GA310 family devices is 4M instructions.
The space is addressable by a 24-bit value derived
from either the 23-bit Program Counter (PC) during pro-
gram execution, or from table operation or data space
remapping, as described in Section 4.3 “Interfacing
Program and Data Memory Spaces”.
User access to the program memory space is restricted
to the lower half of the address range (000000h to
7FFFFFh). The exception is the use of TBLRD/TBLWT
operations, which use TBLPAG<7> to permit access to
the Configuration bits and Device ID sections of the
configuration memory space.
Memory maps for the PIC24FJ128GA310 family of
devices are shown in Figure 4-1.
FIGURE 4-1: PROGRAM SPACE MEMORY MAP FOR PIC24FJ128GA310 FAMILY DEVICES
000000h
0000FEh
000002h
000100h
F8000Eh
F80010h
FEFFFEh
FFFFFEh
000004h
000200h
0001FEh
000104h
Configuration Memory Space User Memory Space
Note: Memory areas are not shown to scale.
FF0000h
F7FFFEh
F80000h
800000h
7FFFFEh
Reset Address
Device Config Registers
User Flash
Program Memory
(22K instructions)
DEVID (2)
GOTO Instruction
Reserved
Alternate Vector Table
Reserved
Interrupt Vector Table
PIC24FJ64GA3XX
Reserved
Flash Config Words
Unimplemented
Read ‘0’
015800h
0157FEh
00AC00h
00ABFEh
Reset Address
DEVID (2)
GOTO Instruction
Reserved
Alternate Vector Table
Reserved
Interrupt Vector Table
PIC24F128GA3XX
Flash Config Words
Device Config Registers
Reserved
Unimplemented
Read ‘0’
User Flash
Program Memory
(44K instructions)
PIC24FJ128GA310 FAMILY
DS39996F-page 42 2010-2011 Microchip Technology Inc.
4.1.1 PROGRAM MEMORY
ORGANIZATION
The program memory space is organized in
word-addressable blocks. Although it is treated as
24 bits wide, it is more appropriate to think of each
address of the program memory as a lower and upper
word, with the upper byte of the upper word being
unimplemented. The lower word always has an even
address, while the upper word has an odd address
(Figure 4-2).
Program memory addresses are always word-aligned
on the lower word and addresses are incremented or
decremented by two during code execution. This
arrangement also provides compatibility with data
memory space addressing and makes it possible to
access data in the program memory space.
4.1.2 HARD MEMORY VECTORS
All PIC24F devices reserve the addresses between
000000h and 000200h for hard-coded program execu-
tion vectors. A hardware Reset vector is provided to
redirect code execution from the default value of the
PC on device Reset to the actual start of code. A GOTO
instruction is programmed by the user at 000000h with
the actual address for the start of code at 000002h.
PIC24F devices also have two interrupt vector tables,
located from 000004h to 0000FFh and 000100h to
0001FFh. These vector tables allow each of the many
device interrupt sources to be handled by separate
ISRs. A more detailed discussion of the interrupt vector
tables is provided in Section 8.1 “Interrupt Vector
Table”.
4.1.3 FLASH CONFIGURATION WORDS
In PIC24FJ128GA310 family devices, the top four words
of on-chip program memory are reserved for configura-
tion information. On device Reset, the configuration
information is copied into the appropriate Configuration
register. The addresses of the Flash Configuration Word
for devices in the PIC24FJ128GA310 family are shown
in Table 4-1. Their location in the memory map is shown
with the other memory vectors in Figure 4-1.
The Configuration Words in program memory are a
compact format. The actual Configuration bits are
mapped in several different registers in the configuration
memory space. Their order in the Flash Configuration
Words does not reflect a corresponding arrangement in
the configuration space. Additional details on the device
Configuration Words are provided in Section 29.0
“S pecial Features”.
TABLE 4-1: FLASH CONFIGURATION
WORDS FOR
PIC24FJ128GA310 FAMILY
DEVICES
FIGURE 4-2: PROGRAM MEMORY ORGANIZATION
Device Program
Memory
(Words)
Configuration Word
Addresses
PIC24FJ64GA3XX 22,016 00ABF8h:00ABFEh
PIC24FJ128GA3XX 44,032 0157F8h:0157FEh
0816
PC Address
0x000000
0x000002
0x000004
0x000006
23
00000000
00000000
00000000
00000000
Program Memory
‘Phantom’ Byte
(read as ‘0’)
least significant word
most significant word
Instruction Width
0x000001
0x000003
0x000005
0x000007
msw
Address (lsw Address)
2010-2011 Microchip Technology Inc. DS39996F-page 43
PIC24FJ128GA310 FAMILY
4.2 Data Memor y Space
The PIC24F core has a 16-bit wide data memory space,
addressable as a single linear range. The data space is
accessed using two Address Generation Units (AGUs),
one each for read and write operations. The data space
memory map is shown in Figure 4-3.
The 16-bit wide data addresses in the data memory
space point to bytes within the Data Space (DS). This
gives a DS address range of 64 Kbytes or 32K words.
The lower half (0000h to 7FFFh) is used for
implemented (on-chip) memory addresses.
The upper half of data memory address space (8000h to
FFFFh) is used as a window into the Extended Data
Space (EDS). This allows the microcontroller to directly
access a greater range of data beyond the standard
16-bit address range. EDS is discussed in detail in
Section 4.2.5 “Extended Data Space (EDS)”.
The lower half of DS is compatible with previous PIC24F
microcontrollers without EDS. All PIC24FJ128GA310
family devices implement 8 Kbytes of data RAM in the
lower half of DS, from 0800h to 27FFh.
4.2.1 DATA SPACE WIDTH
The data memory space is organized in
byte-addressable, 16-bit wide blocks. Data is aligned
in data memory and registers as 16-bit words, but all
data space EAs resolve to bytes. The Least Significant
Bytes (LSBs) of each word have even addresses, while
the Most Significant Bytes (MSBs) have odd
addresses.
FIGURE 4-3: DATA SPACE MEMORY MAP FOR PIC24FJ128GA310 FAMILY DEVICES
Note: This data sheet summarizes the features of
this group of PIC24F devices. It is not
intended to be a comprehensive reference
source. For more information, refer to the
“PIC24F Family Reference Manual”,
Section 45. “Data Memory with
Extended Dat a Sp a ce (EDS)” (DS39733).
The information in this data sheet
supersedes the information in the FRM.
Note: Memory areas not shown to scale.
0000h
07FEh
FFFEh
LSB
Address
LSBMSB
MSB
Address
0001h
07FFh
1FFFh
FFFFh
8001h 8000h
7FFFh
0801h 0800h
2001h
Near
1FFEh
SFR
2000h
7FFEh
EDS Window
Space
Data Space
Upper 32 Kbytes
Data Space
2800h
2801h(1)
Lower 32 Kbytes
Data Space
8 Kbytes Data RAM
SFR Space
Unimplemented
EDS Page 0x1
(32 Kbytes)
EDS Page 0x2
(32 Kbytes)
EDS Page 0x3 (2 Kbytes)
EDS Page 0x4
EDS Page 0x1FF
EDS Page 0x200
EDS Page 0x2FF
EDS Page 0x300
EDS Page 0x3FF
Internal Extended
Data RAM (66 Kbytes)
EPMP Memory Space
Program Space Visibility
Area to Access Lower
Word of Program Memory
Program Space Visibility
Area to Access Upper
Word of Program Memory
PIC24FJ128GA310 FAMILY
DS39996F-page 44 2010-2011 Microchip Technology Inc.
4.2.2 DATA MEMORY ORGANIZATION
AND ALIGNMENT
To maintain backward compatibility with PIC® MCUs and
improve data space memory usage efficiency, the
PIC24F instruction set supports both word and byte
operations. As a consequence of byte accessibility, all
EA calculations are internally scaled to step through
word-aligned memory. For example, the core recognizes
that Post-Modified Register Indirect Addressing mode
[Ws++] will result in a value of Ws + 1 for byte operations
and Ws + 2 for word operations.
Data byte reads will read the complete word, which
contains the byte, using the LSB of any EA to deter-
mine which byte to select. The selected byte is placed
onto the LSB of the data path. That is, data memory
and registers are organized as two parallel, byte-wide
entities with shared (word) address decode but
separate write lines. Data byte writes only write to the
corresponding side of the array or register which
matches the byte address.
All word accesses must be aligned to an even address.
Mis-aligned word data fetches are not supported, so
care must be taken when mixing byte and word
operations or translating from 8-bit MCU code. If a
misaligned read or write is attempted, an address error
trap will be generated. If the error occurred on a read,
the instruction underway is completed; if it occurred on
a write, the instruction will be executed but the write will
not occur. In either case, a trap is then executed, allow-
ing the system and/or user to examine the machine
state prior to execution of the address Fault.
All byte loads into any W register are loaded into the
LSB. The Most Significant Byte (MSB) is not modified.
A Sign-Extend instruction (SE) is provided to allow
users to translate 8-bit signed data to 16-bit signed
values. Alternatively, for 16-bit unsigned data, users
can clear the MSB of any W register by executing a
Zero-Extend (ZE) instruction on the appropriate
address.
Although most instructions are capable of operating on
word or byte data sizes, it should be noted that some
instructions operate only on words.
4.2.3 NEAR DATA SPACE
The 8-Kbyte area between 0000h and 1FFFh is
referred to as the near data space. Locations in this
space are directly addressable via a 13-bit absolute
address field within all memory direct instructions. The
remainder of the data space is addressable indirectly.
Additionally, the whole data space is addressable using
MOV instructions, which support Memory Direct
Addressing with a 16-bit address field.
4.2.4 SPECIAL FUNCTION REGISTER
(SFR) SPACE
The first 2 Kbytes of the near data space, from 0000h
to 07FFh, are primarily occupied with Special Function
Registers (SFRs). These are used by the PIC24F core
and peripheral modules for controlling the operation of
the device.
SFRs are distributed among the modules that they con-
trol and are generally grouped together by module.
Much of the SFR space contains unused addresses;
these are read as ‘0’. A diagram of the SFR space,
showing where the SFRs are actually implemented, is
shown in Tab le 4-2. Each implemented area indicates
a 32-byte region where at least one address is imple-
mented as an SFR. A complete list of implemented
SFRs, including their addresses, is shown in Tables 4-3
through 4-34.
TABLE 4-2: IMPLEMENTED REGIONS OF SFR DATA SPACE
SFR Space A ddress
xx00 xx20 xx40 xx60 xx80 xxA0 xxC0 xxE0
000h Core ICN Interrupts —
100h Timers Capture —Compare —
200h I2C™ UART SPI/UART ——UART I/O
300h A/D/CTMU —DMA —
400h — — — — — —ANA—
500h ————LCD—LCD
600h EPMP RTC/CMP CRC — PPS —
700h —— System NVM/PMD — — — —
Legend: — = No implemented SFRs in this block
2010-2011 Microchip Technology Inc. DS39996F-page 45
PIC24FJ128GA310 FAMILY
TABLE 4-3: CPU CORE REGISTERS MAP
File Name Addr Bit 15 Bit 14 Bit 13 Bit 12 Bit 11 Bit 10 Bit 9 Bit 8 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 All
Resets
WREG0 0000 Working Register 0 0000
WREG1 0002 Working Register 1 0000
WREG2 0004 Working Register 2 0000
WREG3 0006 Working Register 3 0000
WREG4 0008 Working Register 4 0000
WREG5 000A Working Register 5 0000
WREG6 000C Working Register 6 0000
WREG7 000E Working Register 7 0000
WREG8 0010 Working Register 8 0000
WREG9 0012 Working Register 9 0000
WREG10 0014 Working Register 10 0000
WREG11 0016 Working Register 11 0000
WREG12 0018 Working Register 12 0000
WREG13 001A Working Register 13 0000
WREG14 001C Working Register 14 0000
WREG15 001E Working Register 15 0800
SPLIM 0020 Stack Pointer Limit Value Register xxxx
PCL 002E Program Counter Low Word Register 0000
PCH 0030 — — — — — — — — Program Counter Register High Byte 0000
DSRPAG 0032 — — — — — — Extended Data Space Read Page Address Register 0001
DSWPAG 0034 — — — — — — — Extended Data Space Write Page Address Register 0001
RCOUNT 0036 Repeat Loop Counter Register xxxx
SR 0042 — — — — — — — DC IPL2 IPL1 IPL0 RA N OV Z C 0000
CORCON 0044 — — — — — — — — — — — —IPL3 r — — 0004
DISICNT 0052 —— Disable Interrupts Counter Register xxxx
TBLPAG 0054 — — — — — — — — Table Memory Page Address Register 0000
Legend: — = unimplemented, read as ‘0’; r = reserved, do not modify. Reset values are shown in hexadecimal.
PIC24FJ128GA310 FAMILY
DS39996F-page 46 2010-2011 Microchip Technology Inc.
TABLE 4-4: ICN REGISTER MAP
File
Name Addr B it 15 Bit 14 Bit 13 Bit 12 Bit 11 B it 10 Bit 9 Bit 8 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 All
Resets
CNPD1 0056
CN15PDE
CN14PDE CN13PDE CN12PDE CN11PDE CN10PDE CN9PDE CN8PDE CN7PDE CN6PDE CN5PDE CN4PDE CN3PDE CN2PDE — —
0000
CNPD2 0058
CN31PDE
CN30PDE CN29PDE CN28PDE CN27PDE CN26PDE CN25PDE CN24PDE CN23PDE CN22PDE CN21PDE
(1)
CN20PDE
(1)
CN19PDE
(1)
CN18PDE CN17PDE CN16PDE
0000
CNPD3 005A
CN47PDE
(1)
CN46PDE
(2)
CN45PDE
(1)
CN44PDE
(1)
CN43PDE
(1)
CN42PDE
(1)
CN41PDE
(1)
CN40PDE
(2)
CN39PDE
(2)
CN38PDE
(2)
CN37PDE
(2)
CN36PDE
(2)
CN35PDE
(2)
CN34PDE
(2)
CN33PDE
(2)
CN32PDE
0000
CNPD4 005C
CN63PDE
CN62PDE CN61PDE CN60PDE CN59PDE CN58PDE CN57PDE CN56PDE CN55PDE CN54PDE CN53PDE CN52PDE CN51PDE CN50PDE CN49PDE CN48PDE
(2)
0000
CNPD5 005E
CN79PDE
(2)
CN78PDE
(1)
CN77PDE
(1)
CN76PDE
(2)
CN75PDE
(2)
CN74PDE
(1)
CN73PDE CN72PDE CN71PDE CN70PDE CN69PDE CN68PDE CN67PDE
(1)
CN66PDE
(1)
CN65PDE CN64PDE
0000
CNPD6 0060
—
— — — — — — — — — — CN84PDE CN83PDE
(1)
CN82PDE
(2)
CN81PDE
(2)
CN80PDE
(2)
0000
CNEN1 0062
CN15IE
CN14IE CN13IE CN12IE CN11IE CN10IE CN9IE CN8IE CN7IE CN6IE CN5IE CN4IE CN3IE CN2IE — —
0000
CNEN2 0064
CN31IE
CN30IE CN29IE CN28IE CN27IE CN26IE CN25IE CN24IE CN23IE CN22IE CN21IE
(1)
CN20IE
(1)
CN19IE
(1)
CN18IE CN17IE CN16IE
0000
CNEN3 0066
CN47IE
(1)
CN46IE
(1)
CN45IE
(1)
CN44IE
(1)
CN43IE
(1)
CN42IE
(1)
CN41IE
(1)
CN40IE
(2)
CN39IE
(2)
CN38IE
(2)
CN37IE
(2)
CN36IE
(2)
CN35IE
(2)
CN34IE
(2)
CN33IE
(2)
CN32IE
0000
CNEN4 0068
CN63IE
CN62IE CN61IE CN60IE CN59IE CN58IE CN57IE CN56IE CN55IE CN54IE CN53IE CN52IE CN51IE CN50IE CN49IE CN48IE
(2)
0000
CNEN5 006A
CN79IE
(2)
CN78IE
(1)
CN77IE
(1)
CN76IE
(2)
CN75IE
(2)
CN74IE
(1)
CN73IE CN72IE CN71IE CN70IE CN69IE CN68IE CN67IE
(1)
CN66IE
(1)
CN65IE CN64IE
0000
CNEN6 006C
—
— — — — — — — — — — CN84IE CN83IE
(1)
CN82IE
(2)
CN81IE
(2)
CN80IE
(2)
0000
CNPU1 006E
CN15PUE
CN14PUE CN13PUE CN12PUE CN11PUE CN10PUE CN9PUE CN8PUE CN7PUE CN6PUE CN5PUE CN4PUE CN3PUE CN2PUE — —
0000
CNPU2 0070
CN31PUE
CN30PUE CN29PUE CN28PUE CN27PUE CN26PUE CN25PUE CN24PUE CN23PUE CN22PUE CN21PUE
(1)
CN20PUE
(1)
CN19PUE
(1)
CN18PUE CN17PUE CN16PUE
0000
CNPU3 0072
CN47PUE
(1)
CN46PUE
(1)
CN45PUE
(1)
CN44PUE
(1)
CN43PUE
(1)
CN42PUE
(1)
CN41PUE
(1)
CN40PUE
(2)
CN39PUE
(2)
CN38PUE
(2)
CN37PUE
(2)
CN36PUE
(2)
CN35PUE
(2)
CN34PUE
(2)
CN33PUE
(2)
CN32PUE
0000
CNPU4 0074
CN63PUE
CN62PUE CN61PUE CN60PUE CN59PUE CN58PUE CN57PUE CN56PUE CN55PUE CN54PUE CN53PUE CN52PUE CN51PUE CN50PUE CN49PUE CN48PUE
(2)
0000
CNPU5 0076
CN79PUE
(2)
CN78PUE
(1)
CN77PUE
(1)
CN76PUE
(2)
CN75PUE
(2)
CN74PUE
(1)
CN73PUE CN72PUE CN71PUE CN70PUE CN69PUE CN68PUE CN67PUE
(1)
CN66PUE
(1)
CN65PUE CN64PUE
0000
CNPU6 0078
— —
— — — — — — — — — CN84PUE CN83PUE
(1)
CN82PUE
(2)
CN81PUE
(2)
CN80PUE
(2)
0000
Legend: — = unimplemented, read as ‘0’. Reset values are shown in hexadecimal.
Note 1: These bits are unimplemented in 64-pin devices, read as ‘0’.
2: These bits are unimplemented in 64-pin and 80-pin devices, read as ‘0’.
2010-2011 Microchip Technology Inc. DS39996F-page 47
PIC24FJ128GA310 FAMILY
TABLE 4-5: INTERRUPT CONTROLLER REGISTER MAP
File
Name Addr Bit 15 Bit 14 Bit 13 Bit 12 Bit 11 Bit 10 Bit 9 Bit 8 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 All
Resets
INTCON1
0080
NSTDIS — — — — — — — — — —
MATHERR ADDRERR
STKERR OSCFAIL —0000
INTCON2
0082 ALTIVT DISI ————————— INT4EP INT3EP INT2EP INT1EP INT0EP
0000
IFS0
0084 — DMA1IF AD1IF U1TXIF U1RXIF SPI1IF SPF1IF T3IF T2IF OC2IF IC2IF DMA0IF T1IF OC1IF IC1IF INT0IF
0000
IFS1
0086 U2TXIF U2RXIF INT2IF T5IF T4IF OC4IF OC3IF DMA2IF —IC7IF— INT1IF CNIF CMIF MI2C1IF SI2C1IF
0000
IFS2
0088 —DMA4IFPMPIF — OC7IF OC6IF OC5IF IC6IF IC5IF IC4IF IC3IF DMA3IF —— SPI2IF SPF2IF
0000
IFS3
008A —RTCIFDMA5IF—————— INT4IF INT3IF ——MI2C2IFSI2C2IF—
0000
IFS4
008C ——CTMUIF————LVDIF———— CRCIF U2ERIF U1ERIF —
0000
IFS5
008E —————— U4TXIF U4RXIF U4ERIF — — — U3TXIF U3RXIF U3ERIF —
0000
IFS6
0090 ——————————— LCDIF — — — —
0000
IFS7
0092 ——————————JTAGIF— — — — —
0000
IEC0
0094 — DMA1IE AD1IE U1TXIE U1RXIE SPI1IE SPF1IE T3IE T2IE OC2IE IC2IE DMA0IE T1IE OC1IE IC1IE INT0IE
0000
IEC1
0096 U2TXIE U2RXIE INT2IE T5IE T4IE OC4IE OC3IE DMA2IE —IC7IE— INT1IE CNIE CMIE MI2C1IE SI2C1IE
0000
IEC2
0098 — DMA4IE PMPIE — OC7IE OC6IE OC5IE IC6IE IC5IE IC4IE IC3IE DMA3IE —— SPI2IE SPF2IE
0000
IEC3
009A —RTCIEDMA5IE—————— INT4IE INT3IE ——MI2C2IESI2C2IE—
0000
IEC4
009C ——CTMUIE————LVDIE———— CRCIE U2ERIE U1ERIE —
0000
IEC5
009E —————— U4TXIE U4RXIE U4ERIE — — — U3TXIE U3RXIE U3ERIE —
0000
IEC6
00A0 ——————————— LCDIE — — — —
0000
IEC7
00A2 ——————————JTAGIE— — — — —
0000
IPC0
00A4 — T1IP2 T1IP1 T1IP0 — OC1IP2 OC1IP1 OC1IP0 — IC1IP2 IC1IP1 IC1IP0 — INT0IP2 INT0IP1 INT0IP0
4444
IPC1
00A6 — T2IP2 T2IP1 T2IP0 — OC2IP2 OC2IP1 OC2IP0 — IC2IP2 IC2IP1 IC2IP0 — DMA0IP2 DMA0IP1 DMA0IP0
4444
IPC2
00A8 — U1RXIP2 U1RXIP1 U1RXIP0 — SPI1IP2 SPI1IP1 SPI1IP0 — SPF1IP2 SPF1IP1 SPF1IP0 — T3IP2 T3IP1 T3IP0
4444
IPC3
00AA ————— DMA1IP2 DMA1IP1 DMA1IP0 — AD1IP2 AD1IP1 AD1IP0 — U1TXIP2 U1TXIP1 U1TXIP0
0044
IPC4
00AC — CNIP2 CNIP1 CNIP0 — CMIP2 CMIP1 CMIP0 — MI2C1IP2 MI2C1IP1 MI2C1IP0 — SI2C1IP2 SI2C1IP1 SI2C1IP0
4444
IPC5
00AE ————— IC7IP2 IC7IP1 IC7IP0 — — — — — INT1IP2 INT1IP1 INT1IP0
4404
IPC6
00B0 — T4IP2 T4IP1 T4IP0 — OC4IP2 OC4IP1 OC4IP0 — OC3IP2 OC3IP1 OC3IP0 — DMA2IP2 DMA2IP1 DMA2IP0
4444
IPC7
00B2 — U2TXIP2 U2TXIP1 U2TXIP0 — U2RXIP2 U2RXIP1 U2RXIP0 — INT2IP2 INT2IP1 INT2IP0 — T5IP2 T5IP1 T5IP0
4444
IPC8
00B4 ————————— SPI2IP2 SPI2IP1 SPI2IP0 — SPF2IP2 SPF2IP1 SPF2IP0
0044
IPC9
00B6 — IC5IP2 IC5IP1 IC5IP0 — IC4IP2 IC4IP1 IC4IP0 — IC3IP2 IC3IP1 IC3IP0 — DMA3IP2 DMA3IP1 DMA3IP0
4444
IPC10
00B8 — OC7IP2 OC7IP1 OC7IP0 — OC6IP2 OC6IP1 OC6IP0 — OC5IP2 OC5IP1 OC5IP0 — IC6IP2 IC6IP1 IC6IP0
4444
IPC11
00BA ————— DMA4IP2 DMA4IP1 DMA4IP0 — PMPIP2 PMPIP1 PMPIP0 — — — —
0440
IPC12
00BC ————— MI2C2IP2 MI2C2IP1 MI2C2IP0 — SI2C2IP2 SI2C2IP1 SI2C2IP0 — — — —
0440
IPC13
00BE ————— INT4IP2 INT4IP1 INT4IP0 — INT3IP2 INT3IP1 INT3IP0 — — — —
0440
IPC15
00C2 ————— RTCIP2 RTCIP1 RTCIP0 — DMA5IP2 DMA5IP1 DMA5IP0 — — — —
0440
Legend: — = unimplemented, read as ‘0’. Reset values are shown in hexadecimal.
PIC24FJ128GA310 FAMILY
DS39996F-page 48 2010-2011 Microchip Technology Inc.
IPC16
00C4 — CRCIP2 CRCIP1 CRCIP0 — U2ERIP2 U2ERIP1 U2ERIP0 — U1ERIP2 U1ERIP1 U1ERIP0 — — — —
4440
IPC18
00C8 ———————————— — LVDIP2 LVDIP1 LVDIP0
0004
IPC19
00CA ————————— CTMUIP2 CTMUIP1 CTMUIP0 — — — —
0040
IPC20
00CC — U3TXIP2 U3TXIP1 U3TXIP0 — U3RXIP2 U3RXIP1 U3RXIP0 — U3ERIP2 U3ERIP1 U3ERIP0 — — — —
4440
IPC21
00CE — U4ERIP2 U4ERIP1 U4ERIP0 ———————— — ———
4000
IPC22
00D0 ————————— U4TXIP2 U4TXIP1 U4TXIP0 — U4RXIP2 U4RXIP1 U4RXIP0
0044
IPC25
00D6 ———————————— — LCDIP2 LCDIP1 LCDIP0
0004
IPC29
00DE ————————— JTAGIP2 JTAGIP1 JTAGIP0 — — — —
0040
INTTREG
00E0
CPUIRQ —VHOLD— ILR3 ILR2 ILR1 ILR0 —
VECNUM6 VECNUM5 VECNUM4 VECNUM3 VECNUM2 VECNUM1 VECNUM0
0000
TABLE 4-5: INTERRUPT CONTROLLER REGISTER MAP (CONTINUED)
File
Name Addr Bit 15 Bit 14 Bit 13 Bit 12 Bit 11 Bit 10 Bit 9 Bit 8 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 All
Resets
Legend: — = unimplemented, read as ‘0’. Reset values are shown in hexadecimal.
TABLE 4-6: TIMER REGISTER MAP
File Name Addr Bit 15 Bit 14 Bit 13 Bit 12 Bit 11 Bit 10 Bit 9 Bit 8 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 All
Resets
TMR1 0100 Timer1 Register 0000
PR1 0102 Timer1 Period Register FFFF
T1CON 0104 TON —TSIDL— — — TIECS1 TIECS0 — TGATE TCKPS1 TCKPS0 —TSYNCTCS —0000
TMR2 0106 Timer2 Register 0000
TMR3HLD 0108 Timer3 Holding Register (for 32-bit timer operations only) 0000
TMR3 010A Timer3 Register 0000
PR2 010C Timer2 Period Register FFFF
PR3 010E Timer3 Period Register FFFF
T2CON 0110 TON —TSIDL—————— TGATE TCKPS1 TCKPS0 T32 —TCS—0000
T3CON 0112 TON —TSIDL—————— TGATE TCKPS1 TCKPS0 ——TCS—0000
TMR4 0114 Timer4 Register 0000
TMR5HLD 0116 Timer5 Holding Register (for 32-bit operations only) 0000
TMR5 0118 Timer5 Register 0000
PR4 011A Timer4 Period Register FFFF
PR5 011C Timer5 Period Register FFFF
T4CON 011E TON —TSIDL—————— TGATE TCKPS1 TCKPS0 T45 —TCS—0000
T5CON 0120 TON —TSIDL—————— TGATE TCKPS1 TCKPS0 ——TCS—0000
Legend: — = unimplemented, read as ‘0’. Reset values are shown in hexadecimal.
2010-2011 Microchip Technology Inc. DS39996F-page 49
PIC24FJ128GA310 FAMILY
TABLE 4-7: INPUT CAPTURE REGISTER MAP
File
Name Addr Bit 15 Bit 14 Bit 13 Bit 12 Bit 11 Bit 10 Bit 9 Bit 8 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 All
Resets
IC1CON1 0140 —— ICSIDL ICTSEL2 ICTSEL1 ICTSEL0 — — — ICI1 ICI0 ICOV ICBNE ICM2 ICM1 ICM0 0000
IC1CON2 0142 ——————— IC32 ICTRIG TRIGSTAT —
SYNCSEL4 SYNCSEL3 SYNCSEL2 SYNCSEL1 SYNCSEL0
000D
IC1BUF 0144 Input Capture 1 Buffer Register 0000
IC1TMR 0146 Timer Value 1 Register xxxx
IC2CON1 0148 —— ICSIDL ICTSEL2 ICTSEL1 ICTSEL0 — — — ICI1 ICI0 ICOV ICBNE ICM2 ICM1 ICM0 0000
IC2CON2 014A ——————— IC32 ICTRIG TRIGSTAT —
SYNCSEL4 SYNCSEL3 SYNCSEL2 SYNCSEL1 SYNCSEL0
000D
IC2BUF 014C Input Capture 2 Buffer Register 0000
IC2TMR 014E Timer Value 2 Register xxxx
IC3CON1 0150 —— ICSIDL ICTSEL2 ICTSEL1 ICTSEL0 — — — ICI1 ICI0 ICOV ICBNE ICM2 ICM1 ICM0 0000
IC3CON2 0152 ——————— IC32 ICTRIG TRIGSTAT —
SYNCSEL4 SYNCSEL3 SYNCSEL2 SYNCSEL1 SYNCSEL0
000D
IC3BUF 0154 Input Capture 3 Buffer Register 0000
IC3TMR 0156 Timer Value 3 Register xxxx
IC4CON1 0158 —— ICSIDL ICTSEL2 ICTSEL1 ICTSEL0 — — — ICI1 ICI0 ICOV ICBNE ICM2 ICM1 ICM0 0000
IC4CON2 015A ——————— IC32 ICTRIG TRIGSTAT —
SYNCSEL4 SYNCSEL3 SYNCSEL2 SYNCSEL1 SYNCSEL0
000D
IC4BUF 015C Input Capture 4 Buffer Register 0000
IC4TMR 015E Timer Value 4 Register xxxx
IC5CON1 0160 —— ICSIDL ICTSEL2 ICTSEL1 ICTSEL0 — — — ICI1 ICI0 ICOV ICBNE ICM2 ICM1 ICM0 0000
IC5CON2 0162 ——————— IC32 ICTRIG TRIGSTAT —
SYNCSEL4 SYNCSEL3 SYNCSEL2 SYNCSEL1 SYNCSEL0
000D
IC5BUF 0164 Input Capture 5 Buffer Register 0000
IC5TMR 0166 Timer Value 5 Register xxxx
IC6CON1 0168 —— ICSIDL ICTSEL2 ICTSEL1 ICTSEL0 — — — ICI1 ICI0 ICOV ICBNE ICM2 ICM1 ICM0 0000
IC6CON2 016A ——————— IC32 ICTRIG TRIGSTAT —
SYNCSEL4 SYNCSEL3 SYNCSEL2 SYNCSEL1 SYNCSEL0
000D
IC6BUF 016C Input Capture 6 Buffer Register 0000
IC6TMR 016E Timer Value 6 Register xxxx
IC7CON1 0170 —— ICSIDL ICTSEL2 ICTSEL1 ICTSEL0 — — — ICI1 ICI0 ICOV ICBNE ICM2 ICM1 ICM0 0000
IC7CON2 0172 ——————— IC32 ICTRIG TRIGSTAT —
SYNCSEL4 SYNCSEL3 SYNCSEL2 SYNCSEL1 SYNCSEL0
000D
IC7BUF 0174 Input Capture 7 Buffer Register 0000
IC7TMR 0176 Timer Value 7 Register xxxx
Legend: — = unimplemented, read as ‘0’. Reset values are shown in hexadecimal.
PIC24FJ128GA310 FAMILY
DS39996F-page 50 2010-2011 Microchip Technology Inc.
TABLE 4-8: OUTPUT COMPARE REGISTER MAP
File Name Addr
Bit 15 Bit 14 Bit 13 Bit 12 Bit 11 Bit 10 Bit 9 Bit 8 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 All
Resets
OC1CON1
0190
—— OCSIDL OCTSEL2 OCTSEL1 OCTSEL0 ENFLT2 ENFLT1 ENFLT0 OCFLT2 OCFLT1 OCFLT0 TRIGMODE OCM2 OCM1 OCM0
0000
OC1CON2 0192 FLTMD FLTOUT FLTTRIEN OCINV — DCB1 DCB0 OC32 OCTRIG TRIGSTAT OCTRIS SYNCSEL4 SYNCSEL3 SYNCSEL2 SYNCSEL1 SYNCSEL0
000C
OC1RS 0194 Output Compare 1 Secondary Register
0000
OC1R 0196 Output Compare 1 Register
0000
OC1TMR 0198 Timer Value 1 Register
xxxx
OC2CON1 019A —— OCSIDL OCTSEL2 OCTSEL1 OCTSEL0 ENFLT2 ENFLT1 ENFLT0 OCFLT2 OCFLT1 OCFLT0 TRIGMODE OCM2 OCM1 OCM0
0000
OC2CON2 019C FLTMD FLTOUT FLTTRIEN OCINV — DCB1 DCB0 OC32 OCTRIG TRIGSTAT OCTRIS SYNCSEL4 SYNCSEL3 SYNCSEL2 SYNCSEL1 SYNCSEL0
000C
OC2RS 019E Output Compare 2 Secondary Register
0000
OC2R 01A0 Output Compare 2 Register
0000
OC2TMR 01A2 Timer Value 2 Register
xxxx
OC3CON1 01A4 —— OCSIDL OCTSEL2 OCTSEL1 OCTSEL0 ENFLT2 ENFLT1 ENFLT0 OCFLT2 OCFLT1 OCFLT0 TRIGMODE OCM2 OCM1 OCM0
0000
OC3CON2 01A6 FLTMD FLTOUT FLTTRIEN OCINV — DCB1 DCB0 OC32 OCTRIG TRIGSTAT OCTRIS SYNCSEL4 SYNCSEL3 SYNCSEL2 SYNCSEL1 SYNCSEL0
000C
OC3RS 01A8 Output Compare 3 Secondary Register
0000
OC3R 01AA Output Compare 3 Register
0000
OC3TMR 01AC Timer Value 3 Register
xxxx
OC4CON1 01AE —— OCSIDL OCTSEL2 OCTSEL1 OCTSEL0 ENFLT2 ENFLT1 ENFLT0 OCFLT2 OCFLT1 OCFLT0 TRIGMODE OCM2 OCM1 OCM0
0000
OC4CON2 01B0 FLTMD FLTOUT FLTTRIEN OCINV — DCB1 DCB0 OC32 OCTRIG TRIGSTAT OCTRIS SYNCSEL4 SYNCSEL3 SYNCSEL2 SYNCSEL1 SYNCSEL0
000C
OC4RS 01B2 Output Compare 4 Secondary Register
0000
OC4R 01B4 Output Compare 4 Register
0000
OC4TMR 01B6 Timer Value 4 Register
xxxx
OC5CON1 01B8 —— OCSIDL OCTSEL2 OCTSEL1 OCTSEL0 ENFLT2 ENFLT1 ENFLT0 OCFLT1 OCFLT1 OCFLT0 TRIGMODE OCM2 OCM1 OCM0
0000
OC5CON2 01BA FLTMD FLTOUT FLTTRIEN OCINV — DCB1 DCB0 OC32 OCTRIG TRIGSTAT OCTRIS SYNCSEL4 SYNCSEL3 SYNCSEL2 SYNCSEL1 SYNCSEL0
000C
OC5RS 01BC Output Compare 5 Secondary Register
0000
OC5R 01BE Output Compare 5 Register
0000
OC5TMR 01C0 Timer Value 5 Register
xxxx
OC6CON1 01C2 —— OCSIDL OCTSEL2 OCTSEL1 OCTSEL0 ENFLT2 ENFLT1 ENFLT0 OCFLT2 OCFLT1 OCFLT0 TRIGMODE OCM2 OCM1 OCM0
0000
OC6CON2 01C4 FLTMD FLTOUT FLTTRIEN OCINV — DCB1 DCB0 OC32 OCTRIG TRIGSTAT OCTRIS SYNCSEL4 SYNCSEL3 SYNCSEL2 SYNCSEL1 SYNCSEL0
000C
OC6RS 01C6 Output Compare 6 Secondary Register
0000
OC6R 01C8 Output Compare 6 Register
0000
OC6TMR 01CA Timer Value 6 Register
xxxx
Legend: — = unimplemented, read as ‘0’. Reset values are shown in hexadecimal.
2010-2011 Microchip Technology Inc. DS39996F-page 51
PIC24FJ128GA310 FAMILY
OC7CON1 01CC —— OCSIDL OCTSEL2 OCTSEL1 OCTSEL0 ENFLT2 ENFLT1 ENFLT0 OCFLT2 OCFLT1 OCFLT0 TRIGMODE OCM2 OCM1 OCM0
0000
OC7CON2 01CE FLTMD FLTOUT FLTTRIEN OCINV — DCB1 DCB0 OC32 OCTRIG TRIGSTAT OCTRIS SYNCSEL4 SYNCSEL3 SYNCSEL2 SYNCSEL1 SYNCSEL0
000C
OC7RS 01D0 Output Compare 7 Secondary Register
0000
OC7R 01D2 Output Compare 7 Register
0000
OC7TMR 01D4 Timer Value 7 Register
xxxx
TABLE 4-8: OUTPUT COMPARE REGISTER MAP (CONTINUED)
File Name Addr
Bit 15 Bit 14 Bit 13 Bit 12 Bit 11 Bit 10 Bit 9 Bit 8 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 All
Resets
Legend: — = unimplemented, read as ‘0’. Reset values are shown in hexadecimal.
TABLE 4-9: I2C™ REGISTER MAP
File Name Addr Bit 15 Bit 14 Bit 13 Bit 12 Bit 11 Bit 10 Bit 9 Bit 8 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 All
Resets
I2C1RCV 0200 ———————— Receive Register 0000
I2C1TRN 0202 ———————— Transmit Register 00FF
I2C1BRG 0204 — — — — — — — Baud Rate Generator Register 0000
I2C1CON 0206 I2CEN — I2CSIDL SCLREL IPMIEN A10M DISSLW SMEN GCEN STREN ACKDT ACKEN RCEN PEN RSEN SEN 1000
I2C1STAT 0208 ACKSTAT TRSTAT — — — BCL GCSTAT ADD10 IWCOL I2COV D/A PSR/WRBF TBF 0000
I2C1ADD 020A — — — — — — Address Register 0000
I2C1MSK 020C — — — — — — Address Mask Register 0000
I2C2RCV 0210 ———————— Receive Register 0000
I2C2TRN 0212 ———————— Transmit Register 00FF
I2C2BRG 0214 — — — — — — — Baud Rate Generator Register 0000
I2C2CON 0216 I2CEN — I2CSIDL SCLREL IPMIEN A10M DISSLW SMEN GCEN STREN ACKDT ACKEN RCEN PEN RSEN SEN 1000
I2C2STAT 0218 ACKSTAT TRSTAT — — — BCL GCSTAT ADD10 IWCOL I2COV D/A PSR/WRBF TBF 0000
I2C2ADD 021A — — — — — — Address Register 0000
I2C2MSK 021C — — — — — — Address Mask Register 0000
Legend: — = unimplemented, read as ‘0’. Reset values are shown in hexadecimal.
PIC24FJ128GA310 FAMILY
DS39996F-page 52 2010-2011 Microchip Technology Inc.
TABLE 4-10: UART REGISTER MAPS
File Name Addr Bit 15 Bit 14 Bit 13 Bit 12 Bit 11 Bit 10 Bit 9 Bit 8 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 All
Resets
U1MODE 0220 UARTEN — USIDL IREN RTSMD — UEN1 UEN0 WAKE LPBACK ABAUD RXINV BRGH PDSEL1 PDSEL0 STSEL 0000
U1STA 0222 UTXISEL1 UTXINV UTXISEL0 — UTXBRK UTXEN UTXBF TRMT URXISEL1 URXISEL0 ADDEN RIDLE PERR FERR OERR URXDA 0110
U1TXREG 0224 — — — — — — — Transmit Register xxxx
U1RXREG 0226 — — — — — — — Receive Register 0000
U1BRG 0228 Baud Rate Generator Prescaler Register 0000
U2MODE 0230 UARTEN — USIDL IREN RTSMD — UEN1 UEN0 WAKE LPBACK ABAUD RXINV BRGH PDSEL1 PDSEL0 STSEL 0000
U2STA 0232 UTXISEL1 UTXINV UTXISEL0 — UTXBRK UTXEN UTXBF TRMT URXISEL1 URXISEL0 ADDEN RIDLE PERR FERR OERR URXDA 0110
U2TXREG 0234 — — — — — — — Transmit Register xxxx
U2RXREG 0236 — — — — — — — Receive Register 0000
U2BRG 0238 Baud Rate Generator Prescaler Register 0000
U3MODE 0250 UARTEN — USIDL IREN RTSMD — UEN1 UEN0 WAKE LPBACK ABAUD RXINV BRGH PDSEL1 PDSEL0 STSEL 0000
U3STA 0252 UTXISEL1 UTXINV UTXISEL0 — UTXBRK UTXEN UTXBF TRMT URXISEL1 URXISEL0 ADDEN RIDLE PERR FERR OERR URXDA 0110
U3TXREG 0254 — — — — — — — Transmit Register xxxx
U3RXREG 0256 — — — — — — — Receive Register 0000
U3BRG 0258 Baud Rate Generator Prescaler Register 0000
U4MODE 02B0 UARTEN — USIDL IREN RTSMD — UEN1 UEN0 WAKE LPBACK ABAUD RXINV BRGH PDSEL1 PDSEL0 STSEL 0000
U4STA 02B2 UTXISEL1 UTXINV UTXISEL0 — UTXBRK UTXEN UTXBF TRMT URXISEL1 URXISEL0 ADDEN RIDLE PERR FERR OERR URXDA 0110
U4TXREG 02B4 — — — — — — — Transmit Register xxxx
U4RXREG 02B6 — — — — — — — Receive Register 0000
U4BRG 02B8 Baud Rate Generator Prescaler Register 0000
Legend: — = unimplemented, read as ‘0’. Reset values are shown in hexadecimal.
2010-2011 Microchip Technology Inc. DS39996F-page 53
PIC24FJ128GA310 FAMILY
TABLE 4-11: SPI REGISTER MAP
File Name Addr Bit 15 Bit 14 Bit 13 Bit 12 Bit 11 Bit 10 Bit 9 Bit 8 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 All
Resets
SPI1STAT 0240 SPIEN — SPISIDL —— SPIBEC2 SPIBEC1 SPIBEC0 SRMPT SPIROV SRXMPT SISEL2 SISEL1 SISEL0 SPITBF SPIRBF 0000
SPI1CON1 0242 ——— DISSCK DISSDO MODE16 SMP CKE SSEN CKP MSTEN SPRE2 SPRE1 SPRE0 PPRE1 PPRE0 0000
SPI1CON2 0244 FRMEN SPIFSD SPIFPOL ——————————— SPIFE SPIBEN 0000
SPI1BUF 0248 Transmit and Receive Buffer 0000
SPI2STAT 0260 SPIEN — SPISIDL —— SPIBEC2 SPIBEC1 SPIBEC0 SRMPT SPIROV SRXMPT SISEL2 SISEL1 SISEL0 SPITBF SPIRBF 0000
SPI2CON1 0262 ——— DISSCK DISSDO MODE16 SMP CKE SSEN CKP MSTEN SPRE2 SPRE1 SPRE0 PPRE1 PPRE0 0000
SPI2CON2 0264 FRMEN SPIFSD SPIFPOL ——————————— SPIFE SPIBEN 0000
SPI2BUF 0268 Transmit and Receive Buffer 0000
Legend: — = unimplemented, read as ‘0’. Reset values are shown in hexadecimal.
TABLE 4-12: PORTA REGISTER MAP(1)
File
Name Addr Bit 15 Bit 14 Bit 13 Bit 12 Bit 11 Bit 10 Bit 9 Bit 8 Bit 7(2)Bit 6(2)Bit 5(2)Bit 4(2)Bit 3(2)Bit2(2)Bit 1(2)Bit 0(2)All
Resets
TRISA 02C0 TRISA15 TRISA14 ——— TRISA10 TRISA9 — TRISA7 TRISA6 TRISA5 TRISA4 TRISA3 TRISA2 TRISA1 TRISA0 C6FF
PORTA 02C2 RA15 RA14 ———RA10RA9 — RA7 RA6 RA5 RA4 RA3 RA2 RA1 RA0 xxxx
LATA 02C4 LATA15 LATA14 ——— LATA10 L ATA9 — LATA7 LATA6 LATA5 LATA4 LATA3 LATA2 LATA1 LATA0 xxxx
ODCA 02C6 ODA15 ODA14 ———ODA10ODA9 — ODA7 ODA6 ODA5 ODA4 ODA3 ODA2 ODA1 ODA0 0000
Legend: — = unimplemented, read as ‘0’. Reset values are shown in hexadecimal. Reset values shown are for 100-pin devices.
Note 1: PORTA and all associated bits are unimplemented in 64-pin devices and read as ‘0’.
2: These bits are also unimplemented in 80-pin devices, read as ‘0’.
TABLE 4-13 : PORTB REGISTER MAP
File
Name Addr Bit 15 Bit 14 Bit 13 Bit 12 Bit 11 Bit 10 Bit 9 Bit 8 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 All
Resets
TRISB 02C8 TRISB15 TRISB14 TRISB13 TRISB12 TRISB11 TRISB10 TRISB9 TRISB8 TRISB7 TRISB6 TRISB5 TRISB4 TRISB3 TRISB2 TRISB1 TRISB0 FFFF
PORTB 02CA RB15 RB14 RB13 RB12 RB11 RB10 RB9 RB8 RB7 RB6 RB5 RB4 RB3 RB2 RB1 RB0 xxxx
LATB 02CC LATB15 LATB14 LATB13 LATB12 LATB11 LATB10 LATB9 LATB8 LATB7 LATB6 LATB5 LATB4 LATB3 LATB2 LATB1 LATB0 xxxx
ODCB 02CE ODB15 ODB14 ODB13 ODB12 ODB11 ODB10 ODB9 ODB8 ODB7 ODB6 ODB5 ODB4 ODB3 ODB2 ODB1 ODB0 0000
Legend: Reset values are shown in hexadecimal.
PIC24FJ128GA310 FAMILY
DS39996F-page 54 2010-2011 Microchip Technology Inc.
TABLE 4-14 : PORTC REGISTER MAP
File
Name Addr Bit 15 Bit 14 Bit 13 Bit 12 Bit 11 Bit 10 Bit 9 Bit 8 Bit 7 Bit 6 Bit 5 Bit 4(1)Bit 3(2)Bit 2(1)Bit 1(2)Bit 0 All
Resets
TRISC 02D0 TRISC15 ——TRISC12— — — — — — — TRISC4 TRISC3 TRISC2 TRISC1 —901E
PORTC 02D2 RC15(3,4)RC14(5)RC13(5)RC12(3)— — — — — — — RC4 RC3 RC2 RC1 —xxxx
LATC 02D4 LATC15 LATC14 LATC13 LATC12 — — — — — — — LATC4 LATC3 LATC2 LATC1 —xxxx
ODCC 02D6 ODC15 ODC14 ODC13 ODC12 — — — — — — — ODC4 ODC3 ODC2 ODC1 —0000
Legend: — = unimplemented, read as ‘0’. Reset values are shown in hexadecimal. Reset values shown are for 100-pin devices.
Note 1: These bits are unimplemented in 64-pin and 80-pin devices, read as ‘0’.
2: These bits are unimplemented in 64-pin devices, read as ‘0’.
3: RC12 and RC15 are only available when the primary oscillator is disabled or when EC mode is selected (POSCMD<1:0> Configuration bits = 11 or 00); otherwise read as ‘0’.
4: RC15 is only available when the POSCMD<1:0> Configuration bits = 11 or 00 and the OSCIOFN Configuration bit = 1.
5: RC13 and RC14 are input ports only and cannot be used as output ports.
TABLE 4-15 : PORTD REGISTER MAP
File
Name Addr Bit 15(1)Bit 14(1)Bit 13(1)Bit 12(1)Bit 11 Bit 10 Bit 9 Bit 8 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 All
Resets
TRISD 02D8 TRISD15 TRISD14 TRISD13 TRISD12 TRISD11 TRISD10 TRISD9 TRISD8 TRISD7 TRISD6 TRISD5 TRISD4 TRISD3 TRISD2 TRISD1 TRISD0 FFFF
PORTD 02DA RD15 RD14 RD13 RD12 RD11 RD10 RD9 RD8 RD7 RD6 RD5 RD4 RD3 RD2 RD1 RD0 xxxx
LATD 02DC LATD15 LATD14 LATD13 LATD12 LATD11 LATD10 LATD9 LATD8 LATD7 LATD6 LATD5 LATD4 LATD3 LATD2 LATD1 LATD0 xxxx
ODCD 02DE ODD15 ODD14 ODD13 ODD12 ODD11 ODD10 ODD9 ODD8 ODD7 ODD6 ODD5 ODD4 ODD3 ODD2 ODD1 ODD0 0000
Legend: — = unimplemented, read as ‘0’. Reset values are shown in hexadecimal. Reset values shown are for 100-pin devices.
Note 1: These bits are unimplemented in 64-pin devices, read as ‘0’.
TABLE 4-16: PORTE REGISTER MAP
File
Name Addr Bit 15 Bit 14 Bit 13 Bit 12 Bit 11 Bit 10 Bit 9(1)Bit 8(1)Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 All
Resets
TRISE 02E0 —————— TRISE9 TRISE8 TRISE7 TRISE6 TRISE5 TRISE4 TRISE3 TRISE2 TRISE1 TRISE0 03FF
PORTE 02E2 —————— RE9 RE8 RE7 RE6 RE5 RE4 RE3 RE2 RE1 RE0 xxxx
LATE 02E4 —————— LATE9 LATE8 LATE7 LATE6 LATE5 LATE4 LATE3 LATE2 LATE1 LATE0 xxxx
ODCE 02E6 —————— ODE9 ODE8 ODE7 ODE6 ODE5 ODE4 ODE3 ODE2 ODE1 ODE0 0000
Legend: — = unimplemented, read as ‘0’. Reset values are shown in hexadecimal. Reset values shown are for 100-pin devices.
Note 1: These bits are unimplemented in 64-pin devices, read as ‘0’.
2010-2011 Microchip Technology Inc. DS39996F-page 55
PIC24FJ128GA310 FAMILY
TABLE 4-17: PORTF REGISTER MAP
File
Name Addr Bit 15 Bit 14 Bit 13(1)Bit 12(1)Bit 11 Bit 10 Bit 9 Bit 8(2)Bit 7(2)Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 All
Resets
TRISF 02E8 —— TRISF13 TRISF12 — — — TRISF8 TRISF7 TRISF6 TRISF5 TRISF4 TRISF3 TRISF2 TRISF1 TRISF0 31FF
PORTF 02EA —— RF13 RF12 — — — RF8 RF7 RF6 RF5 RF4 RF3 RF2 RF1 RF0 xxxx
LATF 02EC —— L ATF1 3 LATF12 — — — LATF8 LATF7 LATF6 LATF5 LATF4 LATF3 LATF2 LATF1 LATF0 xxxx
ODCF 02EE ——ODF13ODF12— — — ODF8 ODF7 ODF6 ODF5 ODF4 ODF3 ODF2 ODF1 ODF0 0000
Legend: — = unimplemented, read as ‘0’. Reset values are shown in hexadecimal. Reset values shown are for 100-pin devices.
Note 1: These bits are unimplemented in 64-pin devices, read as ‘0’.
2: These bits are unimplemented in 64-pin and 80-pin devices, read as ‘0’.
TABLE 4-18: PORTG REGISTER MAP
File
Name Addr Bit 15(1)Bit 14(1)Bit 13(1)Bit 12(1)Bit 11 Bit 10 Bit 9 Bit 8 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1(2)Bit 0(2)All
Resets
TRISG 02F0 TRISG15 TRISG14 TRISG13 TRISG12 —— TRISG9 TRISG8 TRISG7 TRISG6 —— TRISG3 TRISG2 TRISG1 TRISG0 F3CF
PORTG 02F2 RG15 RG14 RG13 RG12 — — RG9 RG8 RG7 RG6 — — RG3 RG2 RG1 RG0 xxxx
LATG 02F4 LATG15LATG14LATG13LATG12 ——LATG9LATG8LATG7LATG6— — LATG3 LATG2 LATG1 LATG0 xxxx
ODCG 02F6 ODG15 ODG14 ODG13 ODG12 —— ODG9 ODG8 ODG7 ODG6 — — ODG3 ODG2 ODG1 ODG0 0000
Legend: — = unimplemented, read as ‘0’. Reset values are shown in hexadecimal. Reset values shown are for 100-pin devices.
Note 1: These bits are unimplemented in 64-pin and 80-pin devices, read as ‘0’.
2: These bits are unimplemented in 64-pin devices, read as ‘0’.
TABLE 4-19: PAD CONFIGURATION REGISTER MAP (PADCFG1)
File Name Addr Bit 15 Bit 14 Bit 13 Bit 12 Bit 11 Bit 10 Bit 9 Bit 8 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 All
Resets
PADCFG1 02FC ———————————————PMPTTL0000
Legend: — = unimplemented, read as ‘0’. Reset values are shown in hexadecimal.
PIC24FJ128GA310 FAMILY
DS39996F-page 56 2010-2011 Microchip Technology Inc.
TABLE 4-20: A/D REGISTER MAP
File Name Addr Bit 15 Bit 14 Bit 13 Bit 12 Bit 11 Bit 10 Bit 9 Bit 8 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 All
Resets
ADC1BUF0 0300 A/D Data Buffer 0/Threshold for Channel 0 xxxx
ADC1BUF1 0302 A/D Data Buffer 1/Threshold for Channel 1 xxxx
ADC1BUF2 0304 A/D Data Buffer 2/Threshold for Channel 2 xxxx
ADC1BUF3 0306 A/D Data Buffer 3/Threshold for Channel 3 xxxx
ADC1BUF4 0308 A/D Data Buffer 4/Threshold for Channel 4 xxxx
ADC1BUF5 030A A/D Data Buffer 5/Threshold for Channel 5 xxxx
ADC1BUF6 030C A/D Data Buffer 6/Threshold for Channel 6 xxxx
ADC1BUF7 030E A/D Data Buffer 7/Threshold for Channel 7 xxxx
ADC1BUF8 0310 A/D Data Buffer 8/Threshold for Channel 8 xxxx
ADC1BUF9 0312 A/D Data Buffer 9/Threshold for Channel 9 xxxx
ADC1BUF10 0314 A/D Data Buffer 10/Threshold for Channel 10 xxxx
ADC1BUF11 0316 A/D Data Buffer 11/Threshold for Channel 11 xxxx
ADC1BUF12 0318 A/D Data Buffer 12/Threshold for Channel 12 xxxx
ADC1BUF13 031A A/D Data Buffer 13/Threshold for Channel 13/Threshold for Channel 0 in Windowed Compare xxxx
ADC1BUF14 031C A/D Data Buffer 14/Threshold for Channel 14/Threshold for Channel 1 in Windowed Compare xxxx
ADC1BUF15 031E A/D Data Buffer 15/Threshold for Channel 15/Threshold for Channel 2 in Windowed Compare xxxx
ADC1BUF16 0320 A/D Data Buffer 16/Threshold for Channel 16/Threshold for Channel 3 in Windowed Compare(1)xxxx
ADC1BUF17 0322 A/D Data Buffer 17/Threshold for Channel 17/Threshold for Channel 4 in Windowed Compare(1)xxxx
ADC1BUF18 0324 A/D Data Buffer 18/Threshold for Channel 18/Threshold for Channel 5 in Windowed Compare(1)xxxx
ADC1BUF19 0326 A/D Data Buffer 19/Threshold for Channel 19/Threshold for Channel 6 in Windowed Compare(1)xxxx
ADC1BUF20 0328 A/D Data Buffer 20/Threshold for Channel 20/Threshold for Channel 7 in Windowed Compare(1)xxxx
ADC1BUF21 032A A/D Data Buffer 21/Threshold for Channel 21/Threshold for Channel 8 in Windowed Compare(1)xxxx
ADC1BUF22 032C A/D Data Buffer 22/Threshold for Channel 22/Threshold for Channel 9 in Windowed Compare(1)xxxx
ADC1BUF23 032E A/D Data Buffer 23/Threshold for Channel 23/Threshold for Channel 10 in Windowed Compare(1)xxxx
ADC1BUF24 0330 A/D Data Buffer 24/Threshold for Channel 24/Threshold for Channel 11 in Windowed Compare xxxx
ADC1BUF25 0332 A/D Data Buffer 25/Threshold for Channel 25/Threshold for Channel 12 in Windowed Compare xxxx
AD1CON1 0340 ADON — ADSIDL DMABM DMAEN MODE12 FORM1 FORM0 SSRC3 SSRC2 SSRC1 SSRC0 — ASAM SAMP DONE 0000
AD1CON2 0342 PVCFG1 PVCFG0 NVCFG0 OFFCAL
BUFREGEN
CSCNA —— BUFS SMPI4 SMPI3 SMPI2 SMPI1 SMPI0 BUFM ALTS 0000
AD1CON3 0344 ADRC EXTSAM PUMPEN SAMC4 SAMC3 SAMC2 SAMC1 SAMC0 ADCS7 ADCS6 ADCS5 ADCS4 ADCS3 ADCS2 ADCS1 ADCS0 0000
AD1CHS 0348 CH0NB2 CH0NB1 CH0NB0 CH0SB4 CH0SB3 CH0SB2 CH0SB1 CH0SB0 CH0NA2 CH0NA1 CH0NA0 CH0SA4 CH0SA3 CH0SA2 CH0SA1 CH0SA0 0000
AD1CSSH 034E — CSS30 CSS29 CSS28 CSS27 CSS26 CSS25 CSS24 CSS23 CSS22 CSS21 CSS20 CSS19 CSS18 CSS17 CSS16 0000
AD1CSSL 0350 CSS15 CSS14 CSS13 CSS12 CSS11 CSS10 CSS9 CSS8 CSS7 CSS6 CSS5 CSS4 CSS3 CSS2 CSS1 CSS0 0000
Legend: — = unimplemented, read as ‘0’. Reset values are shown in hexadecimal.
Note 1: These bits are unimplemented in 64-pin and 80-pin devices, read as ‘0’.
2010-2011 Microchip Technology Inc. DS39996F-page 57
PIC24FJ128GA310 FAMILY
AD1CON4 0352 — — — — — — — — — — — — — DMABL2 DMABL1 DMABL0 0000
AD1CON5 0354 ASEN LPEN CTMREQ BGREQ —— ASINT1 ASINT0 — — — —WM1WM0CM1CM00000
AD1CHITH 0356 — — — — — — CHH25(1)CHH24(1)CHH23(1)CHH22(1)CHH21(1)CHH20(1)CHH19(1)CHH18(1)CHH17(1)CHH16(1)0000
AD1CHITL
0358 CHH15 CHH14 CHH13 CHH12 CHH11 CHH10 CHH9 CHH8 CHH7 CHH6 CHH5 CHH4 CHH3 CHH2 CHH1 CHH0 0000
AD1CTMENH
0360 —
CTMEN30 CTMEN29 CTMEN28 CTMEN27 CTMEN26 CTMEN25 CTMEN24 CTMEN23 CTMEN22 CTMEN21 CTMEN20 CTMEN19 CTMEN18 CTMEN17 CTMEN16
0000
AD1CTMENL
0362
CTMEN15 CTMEN14 CTMEN13 CTMEN12 CTMEN11 CTMEN10 CTMEN9 CTMEN8 CTMEN7 CTMEN6 CTMEN5 CTMEN4 CTMEN3 CTMEN2 CTMEN1 CTMEN0
0000
AD1DMBUF
0364 Conversion Data Buffer (Extended Buffer mode) xxxx
TABLE 4-20: A/D REGISTER MAP (CONTINUED)
File Name Addr Bit 15 Bit 14 Bit 13 Bit 12 Bit 11 Bit 10 Bit 9 Bit 8 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 All
Resets
Legend: — = unimplemented, read as ‘0’. Reset values are shown in hexadecimal.
Note 1: These bits are unimplemented in 64-pin and 80-pin devices, read as ‘0’.
TABLE 4-21: CTMU REGISTER MAP
File Na m e Addr Bit 15 Bit 14 Bi t 1 3 Bi t 1 2 Bit 11 Bit 1 0 Bit 9 Bit 8 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bi t 0 All
Resets
CTMUCON1 035A CTMUEN — CTMUSIDL TGEN EDGEN EDGSEQEN IDISSEN CTTRIG — — — — — — — —
0000
CTMUCON2 035C
EDG1MOD EDG1POL EDG1SEL3 EDG1SEL2 EDG1SEL1 EDG1SEL0 EDG2STAT EDG1STAT EDG2MOD EDG2POL EDG2SEL3 EDG2SEL2 EDG2SEL1 EDG2SEL0
— —
0000
CTMUICON 035E ITRIM5 ITRIM4 ITRIM3 ITRIM2 ITRIM1 ITRIM0 IRNG1 IRNG0 — — — — — — — —
0000
Legend:
— = unimplemented, read as ‘
0
’. Reset values are shown in hexadecimal.
TABLE 4-22: ANALOG CONFIGURATION REGISTER MAP
File Name Addr Bit 15 Bit 14 Bit 13 Bit 12 Bit 11 Bit 10 Bit 9 Bit 8 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 All
Resets
ANCFG 04DE — — — — — — — — — — — — — VBG6EN VBG2EN VBGEN 0000
ANSA 04E0 ———————— ANSA7(1)ANSA6(1)— — — — — — 00C0
ANSB 04E2 ANSB15 ANSB14 ANSB13 ANSB12 ANSB11 ANSB10 ANSB9 ANSB8 ANSB7 ANSB6 ANSB5 ANSB4 ANSB3 ANSB2 ANSB1 ANSB0 FFFF
ANSC 04E4 ———————————ANSC4
(1)— — — — 0010
ANSD 04E6 ———— ANSD11 ANSD10 —— ANSD7 ANSD6 — — — — — — 0CC0
ANSE 04E8 —————— ANSE9(2)— ANSE7 ANSE6 ANSE5 ANSE4 — — — — 02F0
ANSG 04EC —————— ANSG9 ANSG8 ANSG7 ANSG6 — — — — — — 03C0
Legend: — = unimplemented, read as ‘0’. Reset values are shown in hexadecimal.
Note 1: These bits are unimplemented in 64-pin and 80-pin devices, read as ‘0’.
2: These bits are unimplemented in 64-pin devices. In 80-pin devices, this bit needs to be cleared to get digital functionality on RE9.
PIC24FJ128GA310 FAMILY
DS39996F-page 58 2010-2011 Microchip Technology Inc.
TA BLE 4-23: DMA REGISTER MAP
File Name Addr Bit 15 Bit 14 Bit 13 Bit 12 Bit 11 Bit 10 Bit 9 Bit 8 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 All
Resets
DMACON 0380 DMAEN — — — — — — — — — — — — — — PRSSEL 0000
DMABUF 0382 DMA Transfer Data Buffer 0000
DMAL 0384 DMA High Address Limit 0000
DMAH 0386 DMA Low Address Limit 0000
DMACH0 0388 — — — — — NULLW RELOAD CHREQ
SAMODE1 SAMODE0 DAMODE1 DAMODE0 TRMODE1 TRMODE0
BYTE CHEN 0000
DMAINT0 038A DBUFWF — CHSEL5 CHSEL4 CHSEL3 CHSEL2 CHSEL1 CHSEL0 HIGHIF LOWIF DONEIF HALFIF
OVRUNIF
——HALFEN0000
DMASRC0 038C DMA Channel 0 Source Address 0000
DMADST0 038E DMA Channel 0 Destination Address 0000
DMACNT0 0390 DMA Channel 0 Transaction Count 0001
DMACH1 0392 — — — — — NULLW RELOAD CHREQ
SAMODE1 SAMODE0 DAMODE1 DAMODE0 TRMODE1 TRMODE0
BYTE CHEN 0000
DMAINT1 0394 DBUFWF — CHSEL5 CHSEL4 CHSEL3 CHSEL2 CHSEL1 CHSEL0 HIGHIF LOWIF DONEIF HALFIF
OVRUNIF
——HALFEN0000
DMASRC1 0396 DMA Channel 1 Source Address 0000
DMADST1 0398 DMA Channel 1 Destination Address 0000
DMACNT1 039A DMA Channel 1 Transaction Count 0001
DMACH2 039C — — — — — NULLW RELOAD CHREQ
SAMODE1 SAMODE0 DAMODE1 DAMODE0 TRMODE1 TRMODE0
BYTE CHEN 0000
DMAINT2 039E DBUFWF — CHSEL5 CHSEL4 CHSEL3 CHSEL2 CHSEL1 CHSEL0 HIGHIF LOWIF DONEIF HALFIF
OVRUNIF
——HALFEN0000
DMASRC2 03A0 DMA Channel 2 Source Address 0000
DMADST2 03A2 DMA Channel 2 Destination Address 0000
DMACNT2 03A4 DMA Channel 2 Transaction Count 0001
DMACH3 03A6 — — — — — NULLW RELOAD CHREQ
SAMODE1 SAMODE0 DAMODE1 DAMODE0 TRMODE1 TRMODE0
BYTE CHEN 0000
DMAINT3 03A8 DBUFWF — CHSEL5 CHSEL4 CHSEL3 CHSEL2 CHSEL1 CHSEL0 HIGHIF LOWIF DONEIF HALFIF
OVRUNIF
——HALFEN0000
DMASRC3 03AA DMA Channel 3 Source Address 0000
DMADST3 03AC DMA Channel 3 Destination Address 0000
DMACNT3 03AE DMA Channel 3 Transaction Count 0001
DMACH4 03B0 — — — — — NULLW RELOAD CHREQ
SAMODE1 SAMODE0 DAMODE1 DAMODE0 TRMODE1 TRMODE0
BYTE CHEN 0000
DMAINT4 03B2 DBUFWF — CHSEL5 CHSEL4 CHSEL3 CHSEL2 CHSEL1 CHSEL0 HIGHIF LOWIF DONEIF HALFIF
OVRUNIF
——HALFEN0000
DMASRC4 03B4 DMA Channel 4 Source Address 0000
DMADST4 03B6 DMA Channel 4 Destination Address 0000
DMACNT4 03B8 DMA Channel 4 Transaction Count 0001
DMACH5 03BA — — — — — NULLW RELOAD CHREQ
SAMODE1 SAMODE0 DAMODE1 DAMODE0 TRMODE1 TRMODE0
BYTE CHEN 0000
DMAINT5 03BC DBUFWF —— CHSEL4 CHSEL3 CHSEL2 CHSEL1 CHSEL0 HIGHIF LOWIF DONEIF HALFIF
OVRUNIF
——HALFEN0000
DMASRC5 03BE DMA Channel 5 Source Address 0000
DMADST5 03C0 DMA Channel 5 Destination Address 0000
DMACNT5 03C2 DMA Channel 5 Transaction Count 0001
Legend: — = unimplemented, read as ‘0’. Reset values are shown in hexadecimal.
2010-2011 Microchip Technology Inc. DS39996F-page 59
PIC24FJ128GA310 FAMILY
TABLE 4-24: LCD REGISTER MAP
File Name Addr Bit 15 Bit 14 Bit 13 Bit 12 Bit 11 Bit 10 Bit 9 Bit 8 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 All
Resets
LCDREG 0580
CPEN ————————— BIAS2 BIAS1 BIAS0 MODE13 CKSEL1 CKSEL0
0000
LCDREF 0582
LCDIRE — LCDCST2 LCDCST1 LCDCST0 VLCD3PE VLCD2PE VLCD1PE LRLAP1 LRLAP0 LRLBP1 LRLBP0 — LRLAT2 LRLAT1 LRLAT0
0000
LCDCON 0584
LCDEN —LCDSIDL—————— SLPEN WERR CS1 CS0 LMUX2 LMUX1 LMUX0
0000
LCDPS 0586 ———————— WFT BIASMD LCDA WA LP3 LP2 LP1 LP0 0000
LCDDATA0 0590 S15C0 S14C0 S13C0 S12C0 S11C0 S10C0 S09C0 S08C0 S07C0 S06C0 S05C0 S04C0 S03C0 S02C0 S01C0 S00C0 0000
LCDDATA1 0592 S31C0 S30C0 S29C0 S28C0 S27C0 S26C0 S25C0 S24C0 S23C0 S22C0 S21C0 S20C0 S19C0 S18C0 S17C0 S16C0 0000
LCDDATA2 0594 S47C0 S46C0(1)S45C0(1)S44C0(1)S43C0(1)S42C0(1)S41C0(1)S40C0(1)S39C0(1)S38C0(1)S37C0(1)S36C0(1)S35C0(1)S34C0(1)S33C0(1)S32C0(1)0000
LCDDATA3 0596 S63C0(2)S62C0(2)S61C0(2)S60C0(2)S59C0(2)S58C0(2)S57C0(2)S56C0(2)S55C0(2)S54C0(2)S53C0(2)S52C0(2)S51C0(2)S50C0(1)S49C0(2)S48C0 0000
LCDDATA4 0598 S15C1 S14C1 S13C1 S12C1 S11C1 S10C1 S09C1 S08C1 S07C1 S06C1 S05C1 S04C1 S03C1 S02C1 S01C1 S00C1 0000
LCDDATA5 059A S31C1 S30C1 S29C1 S28C1 S27C1 S26C1 S25C1 S24C1 S23C1 S22C1 S21C1 S20C1 S19C1 S18C1 S17C1 S16C1 0000
LCDDATA6 059C S47C1 S46C1(1)S45C1(1)S44C1(1)S43C1(1)S42C1(1)S41C1(1)S40C1(1)S39C1(1)S38C1(1)S37C1(1)S36C1(1)S35C1(1)S34C1(1)S33C1(1)S32C1(1)0000
LCDDATA7 059E S63C1(2)S62C1(2)S61C1(2)S60C1(2)S59C1(2)S58C1(2)S57C1(2)S56C1(2)S55C1(2)S54C1(2)S53C1(2)S52C1(2)S51C1(2)S50C1(1)S49C1(2)S48C1 0000
LCDDATA8 05A0 S15C2 S14C2 S13C2 S12C2 S11C2 S10C2 S09C2 S08C2 S07C2 S06C2 S05C2 S04C2 S03C2 S02C2 S01C2 S00C2 0000
LCDDATA9 05A2 S31C2 S30C2 S29C2 S28C2 S27C2 S26C2 S25C2 S24C2 S23C2 S22C2 S21C2 S20C2 S19C2 S18C2 S17C2 S16C2 0000
LCDDATA10
05A4 S47C2 S46C2(1)S45C2(1)S44C2(1)S43C2(1)S42C2(1)S41C2(1)S40C2(1)S39C2(1)S38C2(1)S37C2(1)S36C2(1)S35C2(1)S34C2(1)S33C2(1)S32C2(1)0000
LCDDATA11
05A6 S63C2(2)S62C2(2)S61C2(2)S60C2(2)S59C2(2)S58C2(2)S57C2(2)S56C2(2)S55C2(2)S54C2(2)S53C2(2)S52C2(2)S51C2(2)S50C2(1)S49C2(2)S48C2 0000
LCDDATA12
05A8 S15C3 S14C3 S13C3 S12C3 S11C3 S10C3 S09C3 S08C3 S07C3 S06C3 S05C3 S04C3 S03C3 S02C3 S01C3 S00C3 0000
LCDDATA13
05AA S31C3 S30C3 S29C3 S28C3 S27C3 S26C3 S25C3 S24C3 S23C3 S22C3 S21C3 S20C3 S19C3 S18C3 S17C3 S16C3 0000
LCDDATA14
05AC S47C3 S46C3(1)S45C3(1)S44C3(1)S43C3(1)S42C3(1)S41C3(1)S40C3(1)S39C3(1)S38C3(1)S37C3(1)S36C3(1)S35C3(1)S34C3(1)S33C3(1)S32C3(1)0000
LCDDATA15
05AE S63C3(2)S62C3(2)S61C3(2)S60C3(2)S59C3(2)S58C3(2)S57C3(2)S56C3(2)S55C3(2)S54C3(2)S53C3(2)S52C3(2)S51C3(2)S50C3(1)S49C3(2)S48C3 0000
LCDSE3 058E SE63(2)SE62(2)SE61(2)SE60(2)SE59(2)SE58(2)SE57(2)SE56(2)SE55(2)SE54(2)SE53(2)SE52(2)SE51(2)SE50(1)SE49(2)SE48 0000
LCDSE2 058C SE47 SE46(1)SE45(1)SE44(1)SE43(1)SE42(1)SE41(1)SE40(1)SE39(1)SE38(1)SE37(1)SE36(1)SE35(1)SE34(1)SE33(1)SE32(1)0000
LCDSE1 058A SE31 SE30 SE29 SE28 SE27 SE26 SE25 SE24 SE23 SE22 SE21 SE20 SE019 SE18 SE17 SE16 0000
LCDSE0 0588 SE15 SE14 SE13 SE12 SE11 SE10 SE09 SE08 SE07 SE06 SE05 SE04 SE03 SE02 SE01 SE00 0000
LCDDATA16
05B0 S15C4 S14C4 S13C4 S12C4 S11C4 S10C4 S09C4 S08C4 S07C4 S06C4 S05C4 S04C4 S03C4 S02C4 S01C4 S00C4 0000
LCDDATA17
05B2 S31C4 S30C4 S29C4 S28C4 S27C4 S26C4 S25C4 S24C4 S23C4 S22C4 S21C4 S20C4 S19C4 S18C4 S17C4 S16C4 0000
LCDDATA18
05B4 S47C4 S46C4(1)S45C4(1)S44C4(1)S43C4(1)S42C4(1)S41C4(1)S40C4(1)S39C4(1)S38C4(1)S37C4(1)S36C4(1)S35C4(1)S34C4(1)S33C4(1)S32C4(1)0000
LCDDATA19
05B6 S63C4(2)S62C4(2)S61C4(2)S60C4(2)S59C4(2)S58C4(2)S57C4(2)S56C4(2)S55C4(2)S54C4(2)S53C4(2)S52C4(2)S51C4(2)S50C4(1)S49C4(2)S48C4 0000
LCDDATA20
05B8 S15C5 S14C5 S13C5 S12C5 S11C5 S10C5 S09C5 S08C5 S07C5 S06C5 S05C5 S04C5 S03C5 S02C5 S01C5 S00C5 0000
LCDDATA21
05BA S31C5 S30C5 S29C5 S28C5 S27C5 S26C5 S25C5 S24C5 S23C5 S22C5 S21C5 S20C5 S19C5 S18C5 S17C5 S16C5 0000
LCDDATA22
05BC S47C5 S46C5(1)S45C5(1)S44C5(1)S43C5(1)S42C5(1)S41C5(1)S40C5(1)S39C5(1)S38C5(1)S37C5(1)S36C5(1)S35C5(1)S34C5(1)S33C5(1)S32C5(1)0000
LCDDATA23
05BE S63C5(2)S62C5(2)S61C5(2)S60C5(2)S59C5(2)S58C5(2)S57C5(2)S56C5(2)S55C5(2)S54C5(2)S53C5(2)S52C5(2)S51C5(2)S50C5(1)S49C5(2)S48C5 0000
Legend: — = unimplemented, read as ‘0’. Reset values are shown in hexadecimal.
Note 1: These bits are unimplemented in 64-pin devices, read as ‘0’.
2: These bits are unimplemented in 64-pin and 80-pin devices, devices, read as ‘0’.
PIC24FJ128GA310 FAMILY
DS39996F-page 60 2010-2011 Microchip Technology Inc.
LCDDATA24
05C0 S15C6 S14C6 S13C6 S12C6 S11C6 S10C6 S09C6 S08C6 S07C6 S06C6 S05C6 S04C6 S03C6 S02C6 S01C6 S00C6 0000
LCDDATA25
05C2 S31C6 S30C6 S29C6 S28C6 S27C6 S26C6 S25C6 S24C6 S23C6 S22C6 S21C6 S20C6 S19C6 S18C6 S17C6 S16C6 0000
LCDDATA26
05C4 S47C6 S46C6(1)S45C6(1)S44C6(1)S43C6(1)S42C6(1)S41C6(1)S40C6(1)S39C6(1)S38C6(1)S37C6(1)S36C6(1)S35C6(1)S34C6(1)S33C6(1)S32C6(1)0000
LCDDATA27
05C6 S63C6(2)S62C6(2)S61C6(2)S60C6(2)S59C6(2)S58C6(2)S57C6(2)S56C6(2)S55C6(2)S54C6(2)S53C6(2)S52C6(2)S51C6(2)S50C6(1)S49C6(2)S48C6 0000
LCDDATA28
05C8 S15C7 S14C7 S13C7 S12C7 S11C7 S10C7 S09C7 S08C7 S07C7 S06C7 S05C7 S04C7 S03C7 S02C7 S01C7 S00C7 0000
LCDDATA29
05CA S31C7 S30C7 S29C7 S28C7 S27C7 S26C7 S25C7 S24C7 S23C7 S22C7 S21C7 S20C7 S19C7 S18C7 S17C7 S16C7 0000
LCDDATA30
05CC S47C7 S46C7(1)S45C7(1)S44C7(1)S43C7(1)S42C7(1)S41C7(1)S40C7(1)S39C7(1)S38C7(1)S37C7(1)S36C7(1)S35C7(1)S34C7(1)S33C7(1)S32C7(1)0000
LCDDATA31
05CE S63C7(2)S62C7(2)S61C7(2)S60C7(2)S59C7(2)S58C7(2)S57C7(2)S56C7(2)S55C7(2)S54C7(2)S53C7(2)S52C7(2)S51C7(2)S50C7(1)S49C7(2)S48C7 0000
TABLE 4-24: LCD REGISTER MAP (CONTINUED)
File Name Addr Bit 15 Bit 14 Bit 13 Bit 12 Bit 11 Bit 10 Bit 9 Bit 8 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 All
Resets
Legend: — = unimplemented, read as ‘0’. Reset values are shown in hexadecimal.
Note 1: These bits are unimplemented in 64-pin devices, read as ‘0’.
2: These bits are unimplemented in 64-pin and 80-pin devices, devices, read as ‘0’.
TABLE 4-25: PARALLEL MASTER/SLAVE PORT REGISTER MAP
File Name Addr Bit 15 Bit 14 Bit 13 Bit 12 Bit 11 Bit 10 Bit 9 Bit 8 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 All
Resets
PMCON1 0600
PMPEN —
PSIDL
ADRMUX1 ADRMUX0 — MODE1 MODE0 CSF1 CSF0 ALP ALMODE — BUSKEEP IRQM1 IRQM0
0000
PMCON2
0602
BUSY —
ERROR
TIMEOUT ———— RADDR23 RADDR22 RADDR21 RADDR20 RADDR19 RADDR18 RADDR17 RADDR16
0000
PMCON3
0604
PTWREN PTRDEN PTBE1EN PTBE0EN — AWAITM1 AWAITM0 AWAITE — PTEN22 PTEN21 PTEN20 PTEN19 PTEN18 PTEN17 PTEN16
0000
PMCON4
0606
PTEN15 PTEN14
PTEN13
PTEN12 PTEN11 PTEN10 PTEN9 PTEN8 PTEN7 PTEN6 PTEN5 PTEN4 PTEN3 PTEN2 PTEN1 PTEN0
0000
PMCS1CF
0608
CSDIS CSP
CSPTEN
BEP — WRSP RDSP SM ACKP PTSZ1 PTSZ0 — — — — —
0000
PMCS1BS
060A
BASE23 BASE22
BASE21
BASE20 BASE19 BASE18 BASE17 BASE16 BASE15 — — — BASE11 — — —
0200
PMCS1MD
060C
ACKM1 ACKM0 AMWAIT2 AMWAIT1 AMWAIT0 — — — DWAITB1 DWAITB0 DWAITM3 DWAITM2 DWAITM1 DWAITM0 DWAITE1 DWAITE0
0000
PMCS2CF
060E
CSDIS CSP
CSPTEN
BEP — WRSP RDSP SM ACKP PTSZ1 PTSZ0 — — — — —
0000
PMCS2BS
0610
BASE23 BASE22
BASE21
BASE20 BASE19 BASE18 BASE17 BASE16 BASE15 — — — BASE11 — — —
0600
PMCS2MD
0612
ACKM1 ACKM0 AMWAIT2 AMWAIT1 AMWAIT0 — — — DWAITB1 DWAITB0 DWAITM3 DWAITM2 DWAITM1 DWAITM0 DWAITE1 DWAITE0
0000
PMDOUT1
0614 Data Out Register 1<15:8> Data Out Register 1<7:0> xxxx
PMDOUT2
0616 Data Out Register 2<15:8> Data Out Register 2<7:0> xxxx
PMDIN1
0618 Data In Register 1<15:8> Data In Register 1<7:0> xxxx
PMDIN2
061A Data In Register 2<15:8> Data In Register 2<7:0> xxxx
PMSTAT
061C
IBF IBOV
—
— IB3F IB2F IB1F IB0F OBE OBUF —— OB3E OB2E OB1E OB0E
008F
Legend: — = unimplemented, read as ‘0’. Reset values are shown in hexadecimal.
2010-2011 Microchip Technology Inc. DS39996F-page 61
PIC24FJ128GA310 FAMILY
TABLE 4-26: REAL-TIME CLOCK AND CALENDAR (RTCC) REGISTER MAP
File Name Addr Bit 15 Bit 14 Bit 13 Bit 12 Bit 11 Bit 10 Bit 9 Bit 8 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 All
Resets
ALRMVAL 0620 Alarm Value Register Window Based on ALRMPTR<1:0> xxxx
ALCFGRPT 0622 ALRMEN CHIME AMASK3 AMASK2 AMASK1 AMASK0 ALRMPTR1 ALRMPTR0 ARPT7 ARPT6 ARPT5 ARPT4 ARPT3 ARPT2 ARPT1 ARPT0 0000
RTCVAL 0624 RTCC Value Register Window Based on RTCPTR<1:0> xxxx
RCFGCAL 0626 RTCEN — RTCWREN RTCSYNC HALFSEC RTCOE RTCPTR1 RTCPTR0 CAL7 CAL6 CAL5 CAL4 CAL3 CAL2 CAL1 CAL0 Note 1
RTCPWC 0628 PWCEN PWCPOL PWCPRE PWSPRE RTCLK1 RTCLK0 RTCOUT1 RTCOUT0 — — — — — — — — Note 1
Legend: — = unimplemented, read as ‘0’. Reset values are shown in hexadecimal.
Note 1: The status of the RCFGCAL and RTCPWR registers on POR is ‘0000’, and on other Resets, it is unchanged.
TABLE 4-27: DATA SIGNAL MODULATOR (DSM) REGISTER MAP
File Name Addr Bit 15 Bit 14 Bit 13 Bit 12 Bit 1 1 Bit 10 Bit 9 Bit 8 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 All
Resets
MDCON 062A MDEN —MDSIDL—————— MDOE MDSLR MDOPOL — — —MDBIT0020
MDSRC 062C ———————— SODIS — — — MS3 MS2 MS1 MS0 000x
MDCAR 062E CHODIS CHPOL CHSYNC — CH3 CH2 CH1 CH0 CLODIS CLPOL CLSYNC — CL3 CL2 CL1 CL0 0000
Legend: — = unimplemented, read as ‘0’. Reset values are shown in hexadecimal.
TABLE 4-28: COMPARATORS REGISTER MAP
File Name Addr Bit 15 Bit 14 Bit 13 Bit 12 Bit 11 Bit 10 Bit 9 Bit 8 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 All
Resets
CMSTAT 0630 CMIDL — — — C3EVT C2EVT C1EVT ————— C3OUT C2OUT C1OUT 0000
CVRCON 0632 — — — — — CVREFP CVREFM1 CVREFM0 CVREN CVROE CVRR CVRSS CVR3 CVR2 CVR1 CVR0 0000
CM1CON 0634 CON COE CPOL ——— CEVT COUT EVPOL1 EVPOL0 — CREF —— CCH1 CCH0 0000
CM2CON 0636 CON COE CPOL ——— CEVT COUT EVPOL1 EVPOL0 — CREF —— CCH1 CCH0 0000
CM3CON 0638 CON COE CPOL ——— CEVT COUT EVPOL1 EVPOL0 — CREF —— CCH1 CCH0 0000
Legend: — = unimplemented, read as ‘0’. Reset values are shown in hexadecimal.
PIC24FJ128GA310 FAMILY
DS39996F-page 62 2010-2011 Microchip Technology Inc.
TABLE 4-29: CRC REGISTER MAP
File Name Addr Bit 15 Bit 14 Bit 13 Bit 12 Bit 1 1 Bit 10 Bit 9 Bit 8 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 All
Resets
CRCCON1 0640 CRCEN — CSIDL VWORD4 VWORD3 VWORD2 VWORD1 VWORD0 CRCFUL CRCMPT CRCISEL CRCGO LENDIAN ———0040
CRCCON2 0642 ——— DWIDTH4 DWIDTH3 DWIDTH2 DWIDTH1 DWIDTH0 ——— PLEN4 PLEN3 PLEN2 PLEN1 PLEN0 0000
CRCXORL 0644 X15 X14 X13 X12 X11 X10 X9 X8 X7 X6 X5 X4 X3 X2 X1 —0000
CRCXORH 0646 X31 X30 X29 X28 X27 X26 X25 X24 X23 X22 X21 X20 X19 X18 X17 X16 0000
CRCDATL 0648 CRC Data Input Register Low 0000
CRCDATH 064A CRC Data Input Register High 0000
CRCWDATL 064C CRC Result Register Low 0000
CRCWDATH 064E CRC Result Register High 0000
Legend: — = unimplemented, read as ‘0’. Reset values are shown in hexadecimal.
TABLE 4-30: PERIPHERAL PIN SELECT REGISTER MAP
File
Name Addr Bit 15 Bit 14 Bit 13 Bit 12 Bit 11 Bit 10 Bit 9 Bit 8 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 All
Resets
RPINR0 0680 —— INT1R5 INT1R4 INT1R3 INT1R2 INT1R1 INT1R0 — — — — — — — —
3F3F
RPINR1 0682 —— INT3R5 INT3R4 INT3R3 INT3R2 INT3R1 INT3R0 —— INT2R5 INT2R4 INT2R3 INT2R2 INT2R1 INT2R0
3F3F
RPINR2 0684 — — — — — — — — — — INT4R5 INT4R4 INT4R3 INT4R2 INT4R1 INT4R0
3F3F
RPINR3 0686 —— T3CKR5 T3CKR4 T3CKR3 T3CKR2 T3CKR1 T3CKR0 —— T2CKR5 T2CKR4 T2CKR3 T2CKR2 T2CKR1 T2CKR0
3F3F
RPINR4 0688 —— T5CKR5 T5CKR4 T5CKR3 T5CKR2 T5CKR1 T5CKR0 —— T4CKR5 T4CKR4 T4CKR3 T4CKR2 T4CKR1 T4CKR0
3F3F
RPINR7 068E —— IC2R5 IC2R4 IC2R3 IC2R2 IC2R1 IC2R0 —— IC1R5 IC1R4 IC1R3 IC1R2 IC1R1 IC1R0
3F3F
RPINR8 0690 —— IC4R5 IC4R4 IC4R3 IC4R2 IC4R1 IC4R0 —— IC3R5 IC3R4 IC3R3 IC3R2 IC3R1 IC3R0
3F3F
RPINR9 0692 —— IC6R5 IC6R4 IC6R3 IC6R2 IC6R1 IC6R0 —— IC5R5 IC5R4 IC5R3 IC5R2 IC5R1 IC5R0
3F3F
RPINR10 0694 — — — — — — — — — — IC7R5 IC7R4 IC7R3 IC7R2 IC7R1 IC7R0
003F
RPINR11 0696 —— OCFBR5 OCFBR4 OCFBR3 OCFBR2 OCFBR1 OCFBR0 —— OCFAR5 OCFAR4 OCFAR3 OCFAR2 OCFAR1 OCFAR0
3F3F
RPINR17 06A2 —— U3RXR5 U3RXR4 U3RXR3 U3RXR2 U3RXR1 U3RXR0 — — — — — — — —
3F00
RPINR18 06A4 —— U1CTSR5 U1CTSR4 U1CTSR3 U1CTSR2 U1CTSR1 U1CTSR0 —— U1RXR5 U1RXR4 U1RXR3 U1RXR2 U1RXR1 U1RXR0
3F3F
RPINR19 06A6 —— U2CTSR5 U2CTSR4 U2CTSR3 U2CTSR2 U2CTSR1 U2CTSR0 —— U2RXR5 U2RXR4 U2RXR3 U2RXR2 U2RXR1 U2RXR0
3F3F
RPINR20 06A8 —— SCK1R5 SCK1R4 SCK1R3 SCK1R2 SCK1R1 SCK1R0 —— SDI1R5 SDI1R4 SDI1R3 SDI1R2 SDI1R1 SDI1R0
3F3F
RPINR21 06AA —— U3CTSR5 U3CTSR4 U3CTSR3 U3CTSR2 U3CTSR1 U3CTSR0 —— SS1R5 SS1R4 SS1R3 SS1R2 SS1R1 SS1R0
3F3F
RPINR22 06AC —— SCK2R5 SCK2R4 SCK2R3 SCK2R2 SCK2R1 SCK2R0 —— SDI2R5 SDI2R4 SDI2R3 SDI2R2 SDI2R1 SDI2R0
3F3F
RPINR23 06AE —— T1CKR5 T1CKR4 T1CKR3 T1CKR2 T1CKR1 T1CKR0 —— SS2R5 SS2R4 SS2R3 SS2R2 SS2R1 SS2R0
003F
RPINR27 06B6 —— U4CTSR5 U4CTSR4 U4CTSR3 U4CTSR2 U4CTSR1 U4CTSR0 —— U4RXR5 U4RXR4 U4RXR3 U4RXR2 U4RXR1 U4RXR0
3F3F
RPINR30 06BC — — — — — — — — — — MDMIR5 MDMIR4 MDMIR3 MDMIR2 MDMIR1 MDMIR0
003F
RPINR31 06BE —— MDC2R5 MDC2R4 MDC2R3 MDC2R2 MDC2R1 MDC2R0 —— MDC1R5 MDC1R4 MDC1R3 MDC1R2 MDC1R1 MDC1R0
3F3F
Legend: — = unimplemented, read as ‘0’. Reset values are shown in hexadecimal.
Note 1: These bits are unimplemented in 64-pin devices, read as ‘0’.
2: These bits are unimplemented in 64-pin and 80-pin devices, read as ‘0’.
2010-2011 Microchip Technology Inc. DS39996F-page 63
PIC24FJ128GA310 FAMILY
RPOR0 06C0 —— RP1R5 RP1R4 RP1R3 RP1R2 RP1R1 RP1R0 —— RP0R5 RP0R4 RP0R3 RP0R2 RP0R1 RP0R0
0000
RPOR1 06C2 —— RP3R5 RP3R4 RP3R3 RP3R2 RP3R1 RP3R0 —— RP2R5 RP2R4 RP2R3 RP2R2 RP2R1 RP2R0
0000
RPOR2 06C4 ——RP5R5
(1)
RP5R4
(1)
RP5R3
(1)
RP5R2
(1)
RP5R1
(1)
RP5R0
(1)
—— RP4R5 RP4R4 RP4R3 RP4R2 RP4R1 RP4R0
0000
RPOR3 06C6 —— RP7R5 RP7R4 RP7R3 RP7R2 RP7R1 RP7R0 —— RP6R5 RP6R4 RP6R3 RP6R2 RP6R1 RP6R0
0000
RPOR4 06C8 —— RP9R5 RP9R4 RP9R3 RP9R2 RP9R1 RP9R0 —— RP8R5 RP8R4 RP8R3 RP8R2 RP8R1 RP8R0
0000
RPOR5 06CA —— RP11R5 RP11R4 RP11R3 RP11R2 RP11R1 RP11R0 —— RP10R5 RP10R4 RP10R3 RP10R2 RP10R1 RP10R0
0000
RPOR6 06CC —— RP13R5 RP13R4 RP13R3 RP13R2 RP13R1 RP13R0 —— RP12R5 RP12R4 RP12R3 RP12R2 RP12R1 RP12R0
0000
RPOR7 06CE ——RP15R5
(1)
RP15R4
(1)
RP15R3
(1)
RP15R2
(1)
RP15R1
(1)
RP15R0
(1)
—— RP14R5 RP14R4 RP14R3 RP14R2 RP14R1 RP14R0
0000
RPOR8 06D0 —— RP17R5 RP17R4 RP17R3 RP17R2 RP17R1 RP17R0 —— RP16R5 RP16R4 RP16R3 RP16R2 RP16R1 RP16R0
0000
RPOR9 06D2 —— RP19R5 RP19R4 RP19R3 RP19R2 RP19R1 RP19R0 —— RP18R5 RP18R4 RP18R3 RP18R2 RP18R1 RP18R0
0000
RPOR10 06D4 —— RP21R5 RP21R4 RP21R3 RP21R2 RP21R1 RP21R0 —— RP20R5 RP20R4 RP20R3 RP20R2 RP20R1 RP20R0
0000
RPOR11 06D6 —— RP23R5 RP23R4 RP23R3 RP23R2 RP23R1 RP23R0 —— RP22R5 RP22R4 RP22R3 RP22R2 RP22R1 RP22R0
0000
RPOR12 06D8 —— RP25R5 RP25R4 RP25R3 RP25R2 RP25R1 RP25R0 —— RP24R5 RP24R4 RP24R3 RP24R2 RP24R1 RP24R0
0000
RPOR13 06DA —— RP27R5 RP27R4 RP27R3 RP27R2 RP27R1 RP27R0 —— RP26R5 RP26R4 RP26R3 RP26R2 RP26R1 RP26R0
0000
RPOR14 06DC —— RP29R5 RP29R4 RP29R3 RP29R2 RP29R1 RP29R0 —— RP28R5 RP28R4 RP28R3 RP28R2 RP28R1 RP28R0
0000
RPOR15 06DE ——RP31R5
(2)
RP31R4
(2)
RP31R3
(2)
RP31R2
(2)
RP31R1
(2)
RP31R0
(2)
—— RP30R5 RP30R4 RP30R3 RP30R2 RP30R1 RP30R0
0000
TABLE 4-30: PERIPHERAL PIN SELECT REGISTER MAP (CONTINUED)
File
Name Addr Bit 15 Bit 14 Bit 13 Bit 12 Bit 11 Bit 10 Bit 9 Bit 8 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 All
Resets
Legend: — = unimplemented, read as ‘0’. Reset values are shown in hexadecimal.
Note 1: These bits are unimplemented in 64-pin devices, read as ‘0’.
2: These bits are unimplemented in 64-pin and 80-pin devices, read as ‘0’.
TABLE 4-31: SYSTEM CONTROL (CLOCK AND RESET) REGISTER MAP
File Name Addr Bit 15 Bit 14 Bit 13 Bit 12 Bit 11 Bit 10 Bit 9 Bit 8 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 All
Resets
RCON 0740 TRAPR IOPUWR — RETEN — DPSLP CM VREGS EXTR SWR SWDTEN WDTO SLEEP IDLE BOR POR Note 1
OSCCON 0742 — COSC2 COSC1 COSC0 — NOSC2 NOSC1 NOSC0
CLKLOCK
IOLOCK LOCK — CF POSCEN SOSCEN OSWEN Note 2
CLKDIV 0744 ROI DOZE2 DOZE1 DOZE0 DOZEN RCDIV2 RCDIV1 RCDIV0 — — — — — — — — 3100
OSCTUN 0748 —————————— TUN5 TUN4 TUN3 TUN2 TUN1 TUN0 0000
REFOCON 074E ROEN — ROSSLP ROSEL RODIV3 RODIV2 RODIV1 RODIV0 — — — — — — — — 0000
LVDCON 0756 LVDEN —LSIDL—————
DIR
BGVST IRVST — LVDL3 LVDL2 LVDL1 LVDL0 0000
RCON2 0762 ——————————— r VDDBOR VDDPOR VBPOR VBAT Note 1
Legend: — = unimplemented, read as ‘0’; r = reserved. Reset values are shown in hexadecimal.
Note 1: The Reset value of the RCON register is dependent on the type of Reset event. See Section 7.0 “Resets” for more information.
2: The Reset value of the OSCCON register is dependent on both the type of Reset event and the device configuration. See Section 9.0 “Oscillator Configuration” for more information.
PIC24FJ128GA310 FAMILY
DS39996F-page 64 2010-2011 Microchip Technology Inc.
TABLE 4-32: DEEP SLEEP REGI STER MAP
File Name Addr Bit 15 Bit 14 Bit 13 Bit 12 Bit 11 Bit 10 Bit 9 Bit 8 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 All
Resets
DSCON 0758 DSEN — — — — — — — — — — — — r DSBOR RELEASE 0000(1)
DSWAKE 075A — — — — — — — DSINT0 DSFLT —— DSWDT DSRTCC DSMCLR — — 0000(1)
DSGPR0 075C Deep Sleep Semaphore Data 0 0000(1)
DSGPR1 075E Deep Sleep Semaphore Data 1 0000(1)
Legend: — = unimplemented, read as ‘0’; r = reserved. Reset values are shown in hexadecimal.
Note 1: These registers are only reset on a VDD POR event.
TABLE 4-33: NVM REGISTER MAP
File Name Addr Bit 15 Bit 14 Bit 13 Bit 12 Bit 1 1 Bit 10 Bit 9 Bit 8 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 All
Resets
NVMCON 0760 WR WREN WRERR ——————ERASE—— NVMOP3 NVMOP2 NVMOP1 NVMOP0 0000(1)
NVMKEY 0766 ———————— NVMKEY Register<7:0> 0000
Legend: — = unimplemented, read as ‘0’. Reset values are shown in hexadecimal.
Note 1: The Reset value shown is for POR only. The value on other Reset states is dependent on the state of memory write or erase operations at the time of Reset.
TABLE 4-34: PMD REGISTER MAP
File Name Addr Bit 15 Bit 14 Bit 13 Bit 12 Bit 11 Bit 10 Bit 9 Bit 8 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 All
Resets
PMD1 0770 T5MD T4MD T3MD T2MD T1MD — — — I2C1MD U2MD U1MD SPI2MD SPI1MD —— ADC1MD 0000
PMD2 0772 — IC7MD IC6MD IC5MD IC4MD IC3MD IC2MD IC1MD — OC7MD OC6MD OC5MD OC4MD OC3MD OC2MD OC1MD 0000
PMD3 0774 — — — — DSMMD CMPMD RTCCMD PMPMD CRCMD — — —U3MD—I2C2MD—0000
PMD4 0776 — — — — — — — — —UPWMMDU4MD — REFOMD CTMUMD LVDMD —0000
PMD6 077A — — — — — — — — — LCDMD — — — — —SPI3MD0000
PMD7 077C — — — — — — — — — — DMA1MD DMA0MD — — — — 0000
Legend: — = unimplemented, read as ‘0’. Reset values are shown in hexadecimal.
2010-2011 Microchip Technology Inc. DS39996F-page 65
PIC24FJ128GA310 FAMILY
4.2.5 EXTENDED DATA SPACE (EDS)
The Extended Data Space (EDS) allows PIC24F
devices to address a much larger range of data than
would otherwise be possible with a 16-bit address
range. EDS includes any additional internal data mem-
ory not directly accessible by the lower 32-Kbyte data
address space, and any external memory through
EPMP.
In addition, EDS also allows read access to the
program memory space. This feature is called Program
Space Visibility (PSV), and is discussed in detail in
Section 4.3.3 “Reading Dat a from Program Memory
Using EDS”.
Figure 4-4 displays the entire EDS space. The EDS is
organized as pages, called EDS pages, with one page
equal to size of the EDS window (32 Kbytes). A partic-
ular EDS page is selected through the Data Space
Read register (DSRPAG) or Data Space Write register
(DSWPAG). For PSV, only the DSRPAG register is
used. The combination of the DSRPAG register value
and the 16-bit wide data address forms a 24-bit
Effective Address (EA).
The data addressing range of PIC24FJ128GA310 family
devices depends on the version of the Enhanced
Parallel Master Port implemented on a particular device;
this is in turn a function of device pin count. Table 4-35
lists the total memory accessible by each of the devices
in this family. For more details on accessing external
memory using EPMP, refer to the “PIC24F Family Refer -
ence Manual”, Section 42. “Enhance d Parallel Master
Port (EPMP)” (DS39730).
.
FIGURE 4-4: EXTEN DED DATA SPACE
TABLE 4-35: TOTAL ACCESSIBLE DATA
MEMORY
Family Internal
RAM
External RAM
Access Using
EPMP
PIC24FJXXXGA310 8K Up to 16 MB
PIC24FJXXXGA308 8K Up to 64K
PIC24FJXXXGA306 8K Up to 64K
Note: Accessing Page 0 in the EDS window will
generate an address error trap as Page 0
is the base data memory (data locations
0800h to 7FFFh in the lower data space).
0000h
Special
Registers
32-Kbyte
EDS
8000h
Program Memory
DSxPAG
= 001h
DSx PAG
= 1FFh
DSRPAG
= 200h
DSRPAG
= 3FFh
Function
008000h
00FFFEh
000000h 7F8001h
FFFFFEh 007FFEh 7FFFFFh
Program
Space
0800h
FFFEh
EDS Pages
EPMP Memory Space(1)
External
Memory
Access
using
EPMP(1)
FF8000h
DSRPAG
= 2FFh
7F8000h
7FFFFEh
Access
Program
Space
Access
Program
Space
Access
DSRPAG
= 300h
000001h
007FFFh
Program
Space
Access
Note 1: The range of addressable memory available is dependent on the device pin count and EPMP implementation.
External
Memory
Access
using
EPMP(1)
Internal
Data
Memory
Space
(up to
30 Kbytes)
(Lower
Word)
(Lower
Word)
(Upper
Word)
(Upper
Word)
Window
PIC24FJ128GA310 FAMILY
DS39996F-page 66 2010-2011 Microchip Technology Inc.
4.2.5.1 Data Read from EDS
In order to read the data from the EDS space, first, an
Address Pointer is set up by loading the required EDS
page number into the DSRPAG register and assigning
the offset address to one of the W registers. Once the
above assignment is done, the EDS window is enabled
by setting bit 15 of the working register, assigned with
the offset address; then, the contents of the pointed
EDS location can be read.
Figure 4-5 illustrates how the EDS space address is
generated for read operations.
When the Most Significant bit (MSBs) of EA is ‘1’ and
DSRPAG<9> = 0, the lower 9 bits of DSRPAG are con-
catenated to the lower 15 bits of EA to form a 24-bit
EDS space address for read operations.
Example 4-1 shows how to read a byte, word and
double-word from EDS.
FIGURE 4-5: EDS ADDRESS GENERATION FOR READ OPERATIONS
EXAMPLE 4-1: EDS READ CODE IN ASSEMBLY
Note: All read operations from EDS space have
an overhead of one instruction cycle.
Therefore, a minimum of two instruction
cycles is required to complete an EDS
read. EDS reads under the REPEAT
instruction; the first two accesses take
three cycles and the subsequent
accesses take one cycle.
DSRPAG Reg
Select Wn
98
15 Bits
9 Bits
24-Bit EA
Wn<0> is Byte Select
0 = Extended SRAM and EPMP
1
0
; Set the EDS page from where the data to be read
mov #0x0002 , w0
mov w0 , DSRPAG ;page 2 is selected for read
mov #0x0800 , w1 ;select the location (0x800) to be read
bset w1 , #15 ;set the MSB of the base address, enable EDS mode
;Read a byte from the selected location
mov.b [w1++] , w2 ;read Low byte
mov.b [w1++] , w3 ;read High byte
;Read a word from the selected location
mov [w1] , w2 ;
;Read Double - word from the selected location
mov.d [w1] , w2 ;two word read, stored in w2 and w3
2010-2011 Microchip Technology Inc. DS39996F-page 67
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4.2.5.2 Data Write into EDS
In order to write data to EDS space, such as in EDS
reads, an Address Pointer is set up by loading the
required EDS page number into the DSWPAG register,
and assigning the offset address to one of the W regis-
ters. Once the above assignment is done, then the
EDS window is enabled by setting bit 15 of the working
register, assigned with the offset address, and the
accessed location can be written.
Figure 4-2 illustrates how the EDS space address is
generated for write operations.
When the MSBs of EA are ‘1’, the lower 9 bits of
DSWPAG are concatenated to the lower 15 bits of EA
to form a 24-bit EDS address for write operations.
Example 4-2 shows how to write a byte, word and
double-word to EDS.
The Page registers (DSRPAG/DSWPAG) do not
update automatically while crossing a page boundary,
when the rollover happens from 0xFFFF to 0x8000.
While developing code in assembly, care must be taken
to update the page registers when an Address Pointer
crosses the page boundary. The ‘C’ compiler keeps
track of the addressing, and increments or decrements
the Page registers accordingly while accessing
contiguous data memory locations.
FIGURE 4-6: EDS ADDRESS GENE RATION FOR WRITE OPERATIONS
EXAMPLE 4-2: EDS WRITE CODE IN ASSEMBLY
Note 1: All write operations to EDS are executed
in a single cycle.
2: Use of Read/Modify/Write operation on
any EDS location under a REPEAT
instruction is not supported. For example,
BCLR, BSW, BTG, RLC f, RLNC f,
RRC f, RRNC f, ADD f, SUB f,
SUBR f, AND f, IOR f, XOR f,
ASR f, ASL f.
3: Use the DSRPAG register while
performing Read/Modify/Write operations.
DSWPAG Reg
Select Wn
8
15 Bits9 Bits
24-Bit EA
Wn<0> is Byte Select
1
0
; Set the EDS page where the data to be written
mov #0x0002 , w0
mov w0 , DSWPAG ;page 2 is selected for write
mov #0x0800 , w1 ;select the location (0x800) to be written
bset w1 , #15 ;set the MSB of the base address, enable EDS mode
;Write a byte to the selected location
mov #0x00A5 , w2
mov #0x003C , w3
mov.b w2 , [w1++] ;write Low byte
mov.b w3 , [w1++] ;write High byte
;Write a word to the selected location
mov #0x1234 , w2 ;
mov w2 , [w1] ;
;Write a Double - word to the selected location
mov #0x1122 , w2
mov #0x4455 , w3
mov.d w2 , [w1] ;2 EDS writes
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DS39996F-page 68 2010-2011 Microchip Technology Inc.
TABLE 4-36: EDS MEMORY ADDRESS WITH DIFFERENT PAGES AND ADDRESSES
4.2.6 SOFTWARE STACK
Apart from its use as a working register, the W15
register in PIC24F devices is also used as a Software
Stack Pointer (SSP). The pointer always points to the
first available free word and grows from lower to higher
addresses. It pre-decrements for stack pops and
post-increments for stack pushes, as shown in
Figure 4-7. Note that for a PC push during any CALL
instruction, the MSB of the PC is zero-extended before
the push, ensuring that the MSB is always clear.
The Stack Pointer Limit Value register (SPLIM), associ-
ated with the Stack Pointer, sets an upper address
boundary for the stack. SPLIM is uninitialized at Reset.
As is the case for the Stack Pointer, SPLIM<0> is
forced to ‘0’ as all stack operations must be
word-aligned. Whenever an EA is generated using
W15 as a source or destination pointer, the resulting
address is compared with the value in SPLIM. If the
contents of the Stack Pointer (W15) and the SPLIM reg-
ister are equal, and a push operation is performed, a
stack error trap will not occur. The stack error trap will
occur on a subsequent push operation. Thus, for
example, if it is desirable to cause a stack error trap
when the stack grows beyond address 2000h in RAM,
initialize the SPLIM with the value, 1FFEh.
Similarly, a Stack Pointer underflow (stack error) trap is
generated when the Stack Pointer address is found to
be less than 0800h. This prevents the stack from
interfering with the SFR space.
A write to the SPLIM register should not be immediately
followed by an indirect read operation using W15.
FIGURE 4-7: CALL STACK FRAME
DSRPAG
(Data Space Read
Register)
DSWPAG
(Dat a S pace Write
Register)
Source/Destination
Address while
Indirect
Addressing
24-Bit EA
Pointing to EDS Comment
x(1)x(1)0000h to 1FFFh 000000h to
001FFFh
Near data space(2)
2000h to 7FFFh 002000h to
007FFFh
001h 001h
8000h to FFFFh
008000h to
00FFFEh
EPMP memory space
002h 002h 010000h to
017FFEh
003h
•
•
•
•
•
1FFh
003h
•
•
•
•
•
1FFh
018000h to
0187FEh
•
•
•
•
FF8000h to
FFFFFEh
000h 000h Invalid Address Address error trap(3)
Note 1: If the source/destination address is below 8000h, the DSRPAG and DSWPAG registers are not considered.
2: This data space can also be accessed by Direct Addressing.
3: When the source/destination address is above 8000h and DSRPAG/DSWPAG are ‘0’, an address error
trap will occur.
Note: A PC push during exception processing
will concatenate the SRL register to the
MSB of the PC prior to the push.
<Free Word>
PC<15:0>
000000000
015
W15 (before CALL)
W15 (after CALL)
Stack Grows Towards
Higher Address
0000h
PC<22:16>
POP : [--W15]
PUSH : [W15++]
2010-2011 Microchip Technology Inc. DS39996F-page 69
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4.3 Interfacing Program and Dat a
Memory Spaces
The PIC24F architecture uses a 24-bit wide program
space and 16-bit wide data space. The architecture is
also a modified Harvard scheme, meaning that data
can also be present in the program space. To use this
data successfully, it must be accessed in a way that
preserves the alignment of information in both spaces.
Aside from normal execution, the PIC24F architecture
provides two methods by which program space can be
accessed during operation:
• Using table instructions to access individual bytes
or words anywhere in the program space
• Remapping a portion of the program space into
the data space (program space visibility)
Table instructions allow an application to read or write
to small areas of the program memory. This makes the
method ideal for accessing data tables that need to be
updated from time to time. It also allows access to all
bytes of the program word. The remapping method
allows an application to access a large block of data on
a read-only basis, which is ideal for look ups from a
large table of static data. It can only access the least
significant word of the program word.
4.3.1 ADDRESSING PROGRAM SPACE
Since the address ranges for the data and program
spaces are 16 and 24 bits, respectively, a method is
needed to create a 23-bit or 24-bit program address
from 16-bit data registers. The solution depends on the
interface method to be used.
For table operations, the 8-bit Table Memory Page
Address register (TBLPAG) is used to define a 32K word
region within the program space. This is concatenated
with a 16-bit EA to arrive at a full 24-bit program space
address. In this format, the MSBs of TBLPAG is used to
determine if the operation occurs in the user memory
(TBLPAG<7> = 0) or the configuration memory
(TBLPAG<7> = 1).
For remapping operations, the 10-bit Extended Data
Space Read register (DSRPAG) is used to define a
16K word page in the program space. When the Most
Significant bit (MSb) of the EA is ‘1’, and the MSb (bit 9)
of DSRPAG is ‘1’, the lower 8 bits of DSRPAG are con-
catenated with the lower 15 bits of the EA to form a
23-bit program space address. The DSRPAG<8> bit
decides whether the lower word (when bit is ‘0’) or the
higher word (when bit is ‘1’) of program memory is
mapped. Unlike table operations, this strictly limits
remapping operations to the user memory area.
Table 4-37 and Figure 4-8 show how the program EA is
created for table operations and remapping accesses
from the data EA. Here, P<23:0> refers to a program
space word, whereas D<15:0> refers to a data space
word.
TABLE 4-37: PROGRAM SPACE ADDRESS CONSTRUCTION
Access Type Access
Space Program Space Address
<23> <22:16> <15> <14:1> <0>
Instruction Access
(Code Execution)
User 0PC<22:1> 0
0xx xxxx xxxx xxxx xxxx xxx0
TBLRD/TBLWT
(Byte/Word Read/Write)
User TBLPAG<7:0> Data EA<15:0>
0xxx xxxx xxxx xxxx xxxx xxxx
Configuration TBLPAG<7:0> Data EA<15:0>
1xxx xxxx xxxx xxxx xxxx xxxx
Program Space Visibility
(Block Remap/Read)
User 0DSRPAG<7:0>(2)Data EA<14:0>(1)
0 xxxx xxxx xxx xxxx xxxx xxxx
Note 1: Data EA<15> is always ‘1’ in this case, but is not used in calculating the program space address. Bit 15 of
the address is DSRPAG<0>.
2: DSRPAG<9> is always ‘1’ in this case. DSRPAG<8> decides whether the lower word or higher word of
program memory is read. When DSRPAG<8> is ‘0’, the lower word is read and when it is ‘1’, the higher
word is read.
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FIGURE 4-8: DATA ACCESS FROM PROGRAM SPACE ADDRESS GENERATION
0Program Counter
23 Bits
1
DSRPAG<7:0>
8 Bits
EA
15 Bits
Program Counter
Select
TBLPAG
8 Bits
EA
16 Bits
Byte Select
0
0
1/0
User/Configuration
Table Operations(2)
Program Space Visibility(1)
Space Select
24 Bits
23 Bits
(Remapping)
1/0
1/0
Note 1: DSRPAG<8> acts as word select. DSRPAG<9> should always be ‘1’ to map program memory to data memory.
2: The instructions, TBLRDH/TBLWTH/TBLRDL/TBLWTL, decide if the higher or lower word of program memory is
accessed. TBLRDH/TBLWTH instructions access the higher word and TBLRDL/TBLWTL instructions access the
lower word. Table read operations are permitted in the configuration memory space.
1-Bit
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4.3.2 DATA ACCESS FROM PROGRAM
MEMORY USING TABLE
INSTRUCTIONS
The TBLRDL and TBLWTL instructions offer a direct
method of reading or writing the lower word of any
address within the program space without going through
data space. The TBLRDH and TBLWTH instructions are
the only method to read or write the upper 8 bits of a
program space word as data.
The PC is incremented by two for each successive
24-bit program word. This allows program memory
addresses to directly map to data space addresses.
Program memory can thus be regarded as two, 16-bit
word-wide address spaces, residing side by side, each
with the same address range. TBLRDL and TBLWTL
access the space which contains the least significant
data word, and TBLRDH and TBLWTH access the space
which contains the upper data byte.
Two table instructions are provided to move byte or
word-sized (16-bit) data to and from program space.
Both function as either byte or word operations.
1. TBLRDL (Table Read Low): In Word mode, it
maps the lower word of the program space
location (P<15:0>) to a data address (D<15:0>).
In Byte mode, either the upper or lower byte of
the lower program word is mapped to the lower
byte of a data address. The upper byte is
selected when byte select is ‘1’; the lower byte
is selected when it is ‘0’.
2. TBLRDH (Table Read High): In Word mode, it
maps the entire upper word of a program address
(P<23:16>) to a data address. Note that
D<15:8>, the ‘phantom’ byte, will always be ‘0’.
In Byte mode, it maps the upper or lower byte of
the program word to D<7:0> of the data
address, as above. Note that the data will
always be ‘0’ when the upper ‘phantom’ byte is
selected (byte select = 1).
In a similar fashion, two table instructions, TBLWTH
and TBLWTL, are used to write individual bytes or
words to a program space address. The details of
their operation are described in Section 6.0 “Flash
Program Memory”.
For all table operations, the area of program memory
space to be accessed is determined by the Table
Memory Page Address register (TBLPAG). TBLPAG
covers the entire program memory space of the
device, including user and configuration spaces. When
TBLPAG<7> = 0, the table page is located in the user
memory space. When TBLPAG<7> = 1, the page is
located in configuration space.
FIGURE 4-9: ACCESSING PROGRAM MEMORY WITH TABLE INSTRUCTIONS
Note: Only table read operations will execute in
the configuration memory space where
Device IDs are located. Table write
operations are not allowed.
081623
00000000
00000000
00000000
00000000
‘Phantom’ Byte
TBLRDH.B (Wn<0> = 0)
TBLRDL.W
TBLRDL.B (Wn<0> = 1)
TBLRDL.B (Wn<0> = 0)
23 15 0
TBLPAG
02
000000h
800000h
020000h
030000h
Program Space
Data EA<15:0>
The address for the table operation is determined by the data EA
within the page defined by the TBLPAG register.
Only read operations are shown; write operations are also valid in
the user memory area.
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4.3.3 READING DATA FROM PROGRAM
MEMORY USING EDS
The upper 32 Kbytes of data space may optionally be
mapped into any 16K word page of the program space.
This provides transparent access of stored constant
data from the data space without the need to use
special instructions (i.e., TBLRDL/H).
Program space access through the data space occurs
when the MSb of EA is ‘1’ and the DSRPAG<9> is also
‘1’. The lower 8 bits of DSRPAG are concatenated to the
Wn<14:0> bits to form a 23-bit EA to access program
memory. The DSRPAG<8> decides which word should
be addressed; when the bit is ‘0’, the lower word and
when ‘1’, the upper word of the program memory is
accessed.
The entire program memory is divided into 512 EDS
pages, from 200h to 3FFh, each consisting of 16K words
of data. Pages, 200h to 2FFh, correspond to the lower
words of the program memory, while 300h to 3FFh
correspond to the upper words of the program memory.
Using this EDS technique, the entire program memory
can be accessed. Previously, the access to the upper
word of the program memory was not supported.
Table 4-38 provides the corresponding 23-bit EDS
address for program memory with EDS page and
source addresses.
For operations that use PSV and are executed outside
a REPEAT loop, the MOV and MOV.D instructions will
require one instruction cycle in addition to the specified
execution time. All other instructions will require two
instruction cycles in addition to the specified execution
time.
For operations that use PSV, which are executed inside
a REPEAT loop, there will be some instances that
require two instruction cycles in addition to the
specified execution time of the instruction:
• Execution in the first iteration
• Execution in the last iteration
• Execution prior to exiting the loop due to an
interrupt
• Execution upon re-entering the loop after an
interrupt is serviced
Any other iteration of the REPEAT loop will allow the
instruction accessing data, using PSV, to execute in a
single cycle.
TABLE 4-38: EDS PROGRAM ADDRESS WITH DIFFERENT PAGES AND ADDRESSES
EXAMPLE 4-3: EDS READ CODE FROM PROGRAM MEMORY IN ASSE MBLY
DSRPAG
(Data Space Read
Register)
Source Address while
Indirect Addr es sing 23-Bit EA Pointing to
EDS Comment
200h
•
•
•
2FFh
8000h to FFFFh 000000h to 007FFEh
•
•
•
7F8000h to 7FFFFEh
Lower words of 4M program
instructions; (8 Mbytes) for
read operations only.
300h
•
•
•
3FFh
000001h to 007FFFh
•
•
•
7F8001h to 7FFFFFh
Upper words of 4M program
instructions (4 Mbytes remaining;
4 Mbytes are phantom bytes) for
read operations only.
000h Invalid Address Address error trap(1)
Note 1: When the source/destination address is above 8000h and DSRPAG/DSWPAG is ‘0’, an address error trap
will occur.
; Set the EDS page from where the data to be read
mov #0x0202 , w0
mov w0 , DSRPAG ;page 0x202, consisting lower words, is selected for read
mov #0x000A , w1 ;select the location (0x0A) to be read
bset w1 , #15 ;set the MSB of the base address, enable EDS mode
;Read a byte from the selected location
mov.b [w1++] , w2 ;read Low byte
mov.b [w1++] , w3 ;read High byte
;Read a word from the selected location
mov [w1] , w2 ;
;Read Double - word from the selected location
mov.d [w1] , w2 ;two word read, stored in w2 and w3
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FIGURE 4-10: PROGRAM SPACE VISIBILITY OPERATION TO ACCESS LOWER WORD
FIGURE 4-11: PROGRAM SPACE VISIBILITY OPERATION TO ACCESS UPPER WORD
23 15 0
DSRPAG Data Space
Program Space
0000h
8000h
FFFFh
202h 000000h
7FFFFEh
010000h
017FFEh
When DSRPAG<9:8> = 10 and EA<15> = 1
EDS Window
The data in the page
designated by DSRPAG
is mapped into the
upper half of the data
memory space....
Data EA<14:0>
...while the lower
15 bits of the EA
specify an exact
address within the
EDS area. This corre-
sponds exactly to the
same lower 15 bits of
the actual program
space address.
23 15 0
DSRPAG Data Space
Program Space
0000h
8000h
FFFFh
302h 000000h
7FFFFEh
010001h
017FFFh
When DSRPAG<9:8> = 11 and EA<15> = 1
The data in the page
designated by DSRPAG
is mapped into the
upper half of the data
memory space....
Data EA<14:0>
...while the lower
15 bits of the EA
specify an exact
address within the
EDS area. This corre-
sponds exactly to the
same lower 15 bits of
the actual program
space address.
EDS Window
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NOTES:
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5.0 DIRECT MEMORY ACCESS
CONTROLLER (DMA)
The Direct Memory Access Controller (DMA) is
designed to service high-data-throughput peripherals
operating on the SFR bus, allowing them to access
data memory directly and alleviating the need for CPU
intensive management. By allowing these data inten-
sive peripherals to share their own data path, the main
data bus is also de-loaded, resulting in additional
power savings.
The DMA Controller functions both as a peripheral and
a direct extension of the CPU. It is located on the micro-
controller data bus between the CPU and
DMA-enabled peripherals, with direct access to SRAM.
This partitions the SFR bus into two buses, allowing the
DMA Controller access to the DMA-capable peripher-
als located on the new DMA SFR bus. The controller
serves as a master device on the DMA SFR bus,
controlling data flow from DMA capable peripherals.
The controller also monitors CPU instruction process-
ing directly, allowing it to be aware of when the CPU
requires access to peripherals on the DMA bus, and
automatically relinquishing control to the CPU as
needed. This increases the effective bandwidth for
handling data without DMA operations causing a
processor stall. This makes the controller essentially
transparent to the user.
The DMA Controller has these features:
• Six multiple independent and independently
programmable channels
• Concurrent operation with the CPU (no DMA
caused Wait states)
• DMA bus arbitration
• Five Programmable Address modes
• Four Programmable Transfer modes
• Four Flexible Internal Data Transfer modes
• Byte or word support for data transfer
• 16-Bit Source and Destination Address register
for each channel, dynamically updated and
reloadable
• 16-Bit Transaction Count register, dynamically
updated and reloadable
• Upper and Lower Address Limit registers
• Counter half-full level interrupt
• Software triggered transfer
• Null Write mode for symmetric buffer operations
A simplified block diagram of the DMA Controller is
shown if Figure 5-1.
FIGURE 5-1: DMA FUNCTIONAL BLOCK DIAGRAM
Note: This data sheet summarizes the features
of the PIC24FJ128GA310 family of
devices. It is not intended to be a compre-
hensive reference source. To complement
the information in this data sheet, refer to
the “PIC24F Family Reference Manual”,
Section 54. “Direct Memory Access
Controller (DMA)” (DS39742). The infor-
mation in this data sheet supersedes the
information in the FRM.
To I/O Ports To DMA -En a b l e d
Peripherals
and Peripherals
DMACH0
DMAINT0
DMASRC0
DMADST0
DMACNT0
DMACH1
DMAINT1
DMASRC1
DMADST1
DMACNT1
DMACH2
DMAINT2
DMASRC2
DMADST2
DMACNT2
DMACHn
DMAINTn
DMASRCn
DMADSTn
DMACNTn
DMACON
DMAH
DMAL
DMABUF
Channel 0 Channel 1 Channel 4 Channel 5
Data RAM
Address Generation
Data RAM
Control
Logic
Data
Bus
CPU Execution Monitoring
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DS39996F-page 76 2010-2011 Microchip Technology Inc.
5.1 Summary of DMA Operations
The DMA Controller is capable of moving data between
addresses according to a number of different parame-
ters. Each of these parameters can be independently
configured for any transaction; in addition, any or all of
the DMA channels can independently perform a differ-
ent transaction at the same time. Transactions are
classified by these parameters:
• Source and destination (SFRs and data RAM)
• Data Size (byte or word)
• Trigger source
• Transfer mode (One-Shot, Repeated or
Continuous)
• Addressing modes (fixed address or address
blocks, with or without address increment/
decrement)
In addition, the DMA controller provides channel priority
arbitration for all channels.
5.1.1 SOURCE AND DESTINATION
Using the DMA Controller, data may be moved
between any two addresses in the data space. The
SFR space (0000h to 07FFh) or the data RAM space
(0800h to FFFFh) can serve as either the source or the
destination. Data can be moved between these areas
in either direction, or between addresses in either area.
The four different combinations are shown in
Figure 5-2.
If it is necessary to protect areas of data RAM, the DMA
Controller allows the user to set upper and lower address
boundaries for operations in the data space above the
SFR space. The boundaries are set by the DMAH and
DMAL Limit registers. If a DMA channel attempts an
operation outside of the address boundaries, the
transaction is terminated and an interrupt is generated.
5.1.2 DATA SIZE
The DMA Controller can handle both 8-bit and 16-bit
transactions. Size is user-selectable using the SIZE bit
(DMACHn<1>). By default, each channel is configured
for word-size transactions. When byte-size transac-
tions are chosen, the LSb of the source and/or
destination address determines if the data represents
the upper or lower byte of the data RAM location.
5.1.3 TRIGGER SOURCE
The DMA Controller can use any one of the device’s
60 interrupt sources to initiate a transaction. The DMA
trigger sources are listed in reverse order their natural
interrupt priority, and are shown in Table 5-1.
Since the source and destination addresses for any
transaction can be programmed independently of the
trigger source, the DMA Controller can use any trigger
to perform an operation on any peripheral. This also
allows DMA channels to be cascaded to perform more
complex transfer operations.
5.1.4 TRANSFER MODE
The DMA Controller supports four types of data trans-
fers, based on the volume of data to be moved for each
trigger.
• One-Shot: A single transaction occurs for each
trigger.
• Continuous: A series of back-to-back transactions
occur for each trigger; the number of transactions
is determined by the DMACNT transaction
counter.
• Repeated One-Shot: A single transaction is per-
formed repeatedly, once per trigger, until the DMA
channel is disabled.
• Repeated Continuous: A series of transactions
are performed repeatedly, one cycle per trigger,
until the DMA channel is disabled.
All transfer modes allow the option to have the source
and destination addresses and counter value automat-
ically reloaded after the completion of a transaction.
Repeated mode transfers do this automatically.
5.1.5 ADDRESSING MODES
The DMA Controller also supports transfers between
single addresses or address ranges. The four basic
options are:
• Fixed-to-Fixed: Between two constant addresses
• Fixed-to-Block: From a constant source address
to a range of destination addresses
• Block-to-Fixed: From a range of source
addresses to a single, constant destination
address
• Block-to-Block: From a range to source
addresses to a range of destination addresses
The option to select auto-increment or auto-decrement
of source and/or destination addresses is available for
Block Addressing modes.
In addition to the four basic modes, the DMA Controller
also supports Peripheral Indirect Addressing (PIA)
mode, where the source or destination address is gen-
erated jointly by the DMA controller and a PIA capable
peripheral. When enabled, the DMA channel provides
a base source and/or destination address, while the
peripheral provides a fixed-range offset address.
For PIC24FJ128GA310 family devices, the 12-bit A/D
Converter module is the only PIA-capable peripheral.
Details for its use in PIA mode are provided in
Section 24.0 “12-Bit A/D Converter with Threshold
Scan”.
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FIGURE 5-2: TYPES OF DMA DATA TRANSFERS
SFR Area
Data RAM
DMA RAM Area
SFR Area
Data RAM
DMA RAM Area
SFR Area
Data RAM
SFR Area
Data RAM
07FFh
0800h
DMASRCn
DMADSTn
DMA RAM Area
DMAL
DMAH
07FFh
0800h
DMASRCn
DMADSTn
DMAL
DMAH
07FFh
0800h
DMASRCn
DMADSTn
DMAL
DMAH
07FFh
0800h
DMASRCn
DMADSTn
DMAL
DMAH
DMA RAM Area
Peripheral to Memory Memory to Peripheral
Peripheral to Peripheral Memory to Memory
Note: Relative sizes of memory areas are not shown to scale.
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5.1.6 CHANNEL PRIORITY
Each DMA channel functions independently of the oth-
ers, but also competes with the others for access to the
data and DMA busses. When access collisions occur,
the DMA Controller arbitrates between the channels
using a user-selectable priority scheme. Two schemes
are available:
• Round-Robin: When two or more channels col-
lide, the lower-numbered channel receives priority
on the first collision. On subsequent collisions, the
higher numbered channels each receive priority,
based on their channel number.
• Fixed: When two or more channels collide, the
lowest numbered channel always receives
priority, regardless of past history.
5.2 Typical Setup
To set up a DMA channel for a basic data transfer:
1. Enable the DMA Controller (DMAEN = 1) and
select an appropriate channel priority scheme
by setting or clearing PRSSEL.
2. Program DMAH and DMAL with appropriate
upper and lower address boundaries for data
RAM operations.
3. Select the DMA channel to be used and disable
its operation (CHEN = 0).
4. Program the appropriate Source and Destination
addresses for the transaction into the channel’s
DMASRCn and DMADSTn registers. For PIA
mode addressing, use the base address value.
5. Program the DMACNTn register for the number
of triggers per transfer (One-Shot or Continuous
modes), or the number of words (bytes) to be
transferred (Repeated modes).
6. Set or clear the SIZE bit to select the data size.
7. Program the TRMODE bits to select the Data
Transfer mode.
8. Program the SAMODE and DAMODE bits to
select the addressing mode.
9. Enable the DMA channel by setting CHEN.
10. Enable the trigger source interrupt.
5.3 Peripheral Module Disable
Unlike other peripheral modules, the channels of the
DMA Controller cannot be individually powered down
using the Peripheral Module Disable (PMD) registers.
Instead, the channels are controlled as two groups.
The DMA0MD bit (PMD7<4>) selectively controls
DMACH0 through DMACH3. The DMA1MD bit
(PMD7<5>) controls DMACH4 and DMACH5. Setting
both bits effectively disables the DMA Controller.
5.4 Registers
The DMA Controller uses a number of registers to con-
trol its operation. The number of registers depends on
the number of channels implemented for a particular
device.
There are always four module level registers (one
control and three buffer/address):
• DMACON: DMA Control Register (Register 5-1)
• DMAH and DMAL: High and Low Address Limit
Registers
• DMABUF: DMA Data Buffer
Each of the DMA channels implements five registers
(two control and three buffer/address):
• DMACHn: DMA Channel Control Register
(Register 5-2)
• DMAINTn: DMA Channel Interrupt Control Register
(Register 5-3)
• DMASRCn: Data Source Address Pointer for
Channel n
• DMADSTn: Data Destination Source for Channel n
• DMACNTn: Transaction Counter for Channel n
For PIC24FJ128GA310 family devices, there are a
total of 34 registers.
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REGISTER 5-1: DMACON: DMA ENGINE CONTROL REGISTER
R/W-0 U-0 U-0 U-0 U-0 U-0 U-0 U-0
DMAEN — — — — — — —
bit 15 bit 8
U-0 U-0 U-0 U-0 U-0 U-0 U-0 R/W-0
— — — — — — — PRSSEL
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 DMAEN: DMA Module Enable bit
1 = Enables module
0 = Disables module and terminates all active DMA operation(s)
bit 14-1 Unimplemented: Read as ‘0’
bit 0 PRSSEL: Channel Priority Scheme Selection bit
1 = Round-robin scheme
0 = Fixed priority scheme
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REGISTER 5-2: DMACHn: DMA CH ANNEL n CONTROL REGISTER
U-0 U-0 U-0 r-0 R/W-0 R/W-0 R/W-0 R/W-0
— — — r —NULLWRELOAD
(1)CHREQ(3)
bit 15 bit 8
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
SAMODE1 SAMODE0 DAMODE1 DAMODE0 TRMODE1 TRMODE0 SIZE CHEN
bit 7 bit 0
Legend: r = Reserved bit
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-12 Unimplemented: Read as ‘0’
bit 12 Reserved: Maintain as ‘0’
bit 11 Unimplemented: Read as ‘0’
bit 10 NULLW: Null Write Mode bit
1 = A dummy write is initiated to DMASRC for every write to DMADST
0 = No dummy write is initiated
bit 9 RELOAD: Address and Count Reload bit(1)
1 = DMASRC, DMADST, and DMACNT registers are reloaded to their previous values upon the start
of the next operation
0 = DMASRC, DMADST and DMACNT are not reloaded on the start of the next operation(2)
bit 8 CHREQ: DMA Channel Software Request bit(3)
1 = A DMA request is initiated by software; automatically cleared upon completion of a DMA transfer
0 = No DMA request is pending
bit 7-6 SAMODE<1:0>: Source Address Mode Selection bits
11 = DMASRC is used in Peripheral Indirect Addressing and remains unchanged
10 = DMASRC is decremented based on SIZE bit after a transfer completion
01 = DMASRC is incremented based on SIZE bit after a transfer completion
00 = DMASRC remains unchanged after a transfer completion
bit 5-4 DAMODE<1:0>: Destination Address Mode Selection bits
11 = DMADST is used in Peripheral Indirect Addressing and remains unchanged
10 = DMADST is decremented based on SIZE bit after a transfer completion
01 = DMADST is incremented based on SIZE bit after a transfer completion
00 = DMADST remains unchanged after a transfer completion
bit 3-2 TRMODE<1:0>: Transfer Mode Selection bits
11 = Repeated Continuous
10 = Continuous
01 = Repeated One-Shot
00 = One-Shot
bit 1 SIZE: Data Size Selection bit
1 = Byte (8-bit)
0 = Word (16-bit)
bit 0 CHEN: DMA Channel Enable bit
1 = The corresponding channel is enabled
0 = The corresponding channel is disabled
Note 1: Only the original DMACNT is required to be stored to recover the original DMASRC and DMADST.
2: DMASRC, DMADST and DMACNT are always reloaded in Repeated mode transfers (DMACHn<2> = 1),
regardless of the state of the RELOAD bit.
3: The number of transfers executed while CHREQ is set depends on the configuration of TRMODE<1:0>.
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REGISTER 5-3: DMAINTn: DMA CHANNEL n INTERRUPT REGISTER
R-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
DBUFWF(1)— CHSEL5 CHSEL4 CHSEL3 CHSEL2 CHSEL1 CHSEL0
bit 15 bit 8
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 U-0 U-0 R/W-0
HIGHIF(1,2)LOWIF(1,2)DONEIF(1)HALFIF(1)OVRUNIF(1)——HALFEN
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 DBUFWF: Buffered Data Write Flag bit(1)
1 = The content of the DMA buffer has not been written to the location specified in DMADST, or
DMASRC in Null Write mode
0 = The content of the DMA buffer has been written to the location specified in DMADST, or DMASRC
in Null Write mode
bit 14 Unimplemented: Read as ‘0’
bit 13-8 CHSEL<5:0>: DMA Channel Trigger Selection bits
See Tab l e 5 -1 for a complete list.
bit 7 HIGHIF: DMA High Address Limit Interrupt Flag bit(1,2)
1 = The DMA channel has attempted to access an address higher than DMAH, or the upper limit of the
data RAM space.
0 = The DMA channel has not invoked the high address limit interrupt.
bit 6 LOWIF: DMA Low Address Limit Interrupt Flag bit(1,2)
1 = The DMA channel has attempted to access the DMA SFR address lower than DMAL, but above
the SFR range (07FFh)
0 = The DMA channel has not invoked the low address limit interrupt
bit 5 DONEIF: DMA Complete Operation Interrupt Flag bit(1)
If CHEN = 1:
1 = The previous DMA session has ended with completion
0 = The current DMA session has not yet completed
If CHEN = 0:
1 = The previous DMA session has ended with completion
0 = The previous DMA session has ended without completion
bit 4 HALFIF: DMA 50% Water Mark Level Interrupt Flag bit(1)
1 = DMACNT has reached the halfway point to 0000h
0 = DMACNT has not reached the halfway point
bit 3 OVRUNIF: DMA Channel Overrun Flag bit(1)
1 = The DMA channel is triggered while it is still completing the operation based on the previous trigger
0 = The overrun condition has not occurred
bit 2-1 Unimplemented: Read as ‘0’
bit 0 HALFEN: Halfway Completion Water Mark bit
1 = Interrupts are invoked when DMACNT has reached its halfway point and at completion
0 = An interrupt is invoked only at the completion of the transfer
Note 1: Setting these flags in software does not generate an interrupt.
2: Testing for address limit violations (DMASRC or DMADST is either greater than DMAH or less than
DMAL) is NOT done before the actual access.
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TABLE 5-1: DMA TRIGGER SOURCES
CHSEL<5:0> Trigger (Interrupt) CHSEL<5:0> Trigger (Interrupt)
000000 (Unimplemented) 100000 UART2 Transmit
000001 JTAG 100001 UART2 Receive
000010 LCD 100010 External Interrupt 2
000011 UART4 Transmit 100011 Timer5
000100 UART4 Receive 100100 Timer4
000101 UART4 Error 100101 Output Compare 4
000110 UART3 Transmit 100110 Output Compare 3
000111 UART3 Receive 100111 DMA Channel 2
001000 UART3 Error 101000 Input Capture 7
001001 CTMU Event 101001 External Interrupt 1
001010 HLVD 101010 Interrupt-on-Change
001011 CRC Done 101011 Comparators Event
001100 UART2 Error 101100 I2C1 Master Event
001101 UART1 Error 101101 I2C1 Slave Event
001110 RTCC 101110 DMA Channel 1
001111 DMA Channel 5 101111 A/D Converter
010000 External Interrupt 4 110000 UART1 Transmit
010001 External Interrupt 3 110001 UART1 Receive
010010 I2C2 Master Event 110010 SPI1 Event
010011 I2C2 Slave Event 110011 SPI1 Error
010100 DMA Channel 4 110100 Timer3
010101 EPMP 110101 Timer2
010110 Output Compare 7 110110 Output Compare 2
010111 Output Compare 6 110111 Input Capture 2
011000 Output Compare 5 111000 DMA Channel 0
011001 Input Capture 6 111001 Timer1
011010 Input Capture 5 111010 Output Compare 1
011011 Input Capture 4 111011 Input Capture 1
011100 Input Capture 3 111100 External Interrupt 0
011101 DMA Channel 3 111101 (Unimplemented)
011110 SPI2 Event 111110 (Unimplemented)
011111 SPI2 Error 111111 (Unimplemented)
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6.0 FLASH PROGRAM MEMORY
The PIC24FJ128GA310 family of devices contains
internal Flash program memory for storing and execut-
ing application code. The program memory is readable,
writable and erasable. The Flash can be programmed
in four ways:
• In-Circuit Serial Programming™ (ICSP™)
• Run-Time Self-Programming (RTSP)
•JTAG
• Enhanced In-Circuit Serial Programming
(Enhanced ICSP)
ICSP allows a PIC24FJ128GA310 family device to be
serially programmed while in the end application circuit.
This is simply done with two lines for the programming
clock and programming data (named PGECx and
PGEDx, respectively), and three other lines for power
(VDD), ground (VSS) and Master Clear (MCLR). This
allows customers to manufacture boards with
unprogrammed devices and then program the
microcontroller just before shipping the product. This
also allows the most recent firmware or a custom
firmware to be programmed.
RTSP is accomplished using TBLRD (table read) and
TBLWT (table write) instructions. With RTSP, the user
may write program memory data in blocks of 64 instruc-
tions (192 bytes) at a time and erase program memory
in blocks of 512 instructions (1536 bytes) at a time.
6.1 Table Instructions and Flash
Programming
Regardless of the method used, all programming of
Flash memory is done with the table read and write
instructions. These allow direct read and write access to
the program memory space from the data memory while
the device is in normal operating mode. The 24-bit target
address in the program memory is formed using the
TBLPAG<7:0> bits and the Effective Address (EA) from
a W register, specified in the table instruction, as shown
in Figure 6-1.
The TBLRDL and the TBLWTL instructions are used to
read or write to bits<15:0> of program memory.
TBLRDL and TBLWTL can access program memory in
both Word and Byte modes.
The TBLRDH and TBLWTH instructions are used to read
or write to bits<23:16> of program memory. TBLRDH
and TBLWTH can also access program memory in Word
or Byte mode.
FIGURE 6-1: ADDRESSING FOR TABLE REGISTERS
Note: This data sheet summarizes the features of
this group of PIC24F devices. It is not
intended to be a comprehensive reference
source. For more information, refer to the
“PIC24F Family Reference Manual”,
Section 4. “Program Memory”
(DS39715). The information in this data
sheet supersedes the information in the
FRM.
0
Program Counter
24 Bits
Program
TBLPAG Reg
8 Bits
Working Reg EA
16 Bits
Using
Byte
24-Bit EA
0
1
/
0
Select
Table
Instruction
Counter
Using
User/Configuration
Space Select
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6.2 RTSP Operation
The PIC24F Flash program memory array is organized
into rows of 64 instructions or 192 bytes. RTSP allows
the user to erase blocks of eight rows (512 instructions)
at a time and to program one row at a time. It is also
possible to program single words.
The 8-row erase blocks and single row write blocks are
edge-aligned, from the beginning of program memory, on
boundaries of 1536 bytes and 192 bytes, respectively.
When data is written to program memory using TBLWT
instructions, the data is not written directly to memory.
Instead, data written using table writes is stored in
holding latches until the programming sequence is
executed.
Any number of TBLWT instructions can be executed
and a write will be successfully performed. However,
64 TBLWT instructions are required to write the full row
of memory.
To ensure that no data is corrupted during a write, any
unused address should be programmed with
FFFFFFh. This is because the holding latches reset to
an unknown state, so if the addresses are left in the
Reset state, they may overwrite the locations on rows
which were not rewritten.
The basic sequence for RTSP programming is to set up
a Table Pointer, then do a series of TBLWT instructions
to load the buffers. Programming is performed by
setting the control bits in the NVMCON register.
Data can be loaded in any order and the holding regis-
ters can be written to multiple times before performing
a write operation. Subsequent writes, however, will
wipe out any previous writes.
All of the table write operations are single-word writes
(2 instruction cycles), because only the buffers are writ-
ten. A programming cycle is required for programming
each row.
6.3 JTAG Operation
The PIC24F family supports JTAG boundary scan.
Boundary scan can improve the manufacturing
process by verifying pin to PCB connectivity.
6.4 Enha n c ed In -Cir c u it Se r ia l
Programming
Enhanced In-Circuit Serial Programming uses an
on-board bootloader, known as the program executive,
to manage the programming process. Using an SPI
data frame format, the program executive can erase,
program and verify program memory. For more
information on Enhanced ICSP, see the device
programming specification.
6.5 Control Registers
There are two SFRs used to read and write the
program Flash memory: NVMCON and NVMKEY.
The NVMCON register (Register 6-1) controls which
blocks are to be erased, which memory type is to be
programmed and when the programming cycle starts.
NVMKEY is a write-only register that is used for write
protection. To start a programming or erase sequence,
the user must consecutively write 55h and AAh to the
NVMKEY register. Refer to Section 6.6 “Programming
Operations” for further details.
6.6 Programming Operations
A complete programming sequence is necessary for
programming or erasing the internal Flash in RTSP
mode. During a programming or erase operation, the
processor stalls (Waits) until the operation is finished.
Setting the WR bit (NVMCON<15>) starts the opera-
tion and the WR bit is automatically cleared when the
operation is finished.
Note: Writing to a location multiple times without
erasing is not recommended.
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REGISTER 6-1: NVMCON: FLASH ME MORY CONTROL REGISTER
R/S-0, HC(1)R/W-0(1)R-0, HSC(1)U-0 U-0 U-0 U-0 U-0
WR WREN WRERR —————
bit 15 bit 8
U-0 R/W-0(1)U-0 U-0 R/W-0(1)R/W-0(1)R/W-0(1)R/W-0(1)
—ERASE——NVMOP3
(2)NVMOP2(2)NVMOP1(2)NVMOP0(2)
bit 7 bit 0
Legend: S = Settable bit HC = Hardware Clearable bit
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
HSC = Hardware Settable/Clearable bit
bit 15 WR: Write Control bit(1)
1 = Initiates a Flash memory program or erase operation; the operation is self-timed and the bit is
cleared by hardware once the operation is complete
0 = Program or erase operation is complete and inactive
bit 14 WREN: Write Enable bit(1)
1 = Enable Flash program/erase operations
0 = Inhibit Flash program/erase operations
bit 13 WRERR: Write Sequence Error Flag bit(1)
1 = An improper program or erase sequence attempt or termination has occurred (bit is set
automatically on any set attempt of the WR bit)
0 = The program or erase operation completed normally
bit 12-7 Unimplemented: Read as ‘0’
bit 6 ERASE: Erase/Program Enable bit(1)
1 = Perform the erase operation specified by NVMOP<3:0> on the next WR command
0 = Perform the program operation specified by NVMOP<3:0> on the next WR command
bit 5-4 Unimplemented: Read as ‘0’
bit 3-0 NVMOP<3:0>: NVM Operation Select bits(1,2)
1111 = Memory bulk erase operation (ERASE = 1) or no operation (ERASE = 0)(3)
0011 = Memory word program operation (ERASE = 0) or no operation (ERASE = 1)
0010 = Memory page erase operation (ERASE = 1) or no operation (ERASE = 0)
0001 = Memory row program operation (ERASE = 0) or no operation (ERASE = 1)
Note 1: These bits can only be reset on a Power-on Reset.
2: All other combinations of NVMOP<3:0> are unimplemented.
3: Available in ICSP™ mode only; refer to the device programming specification.
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6.6.1 PROGRAMMING ALGORITHM FOR
FLASH PROGRAM MEMORY
The user can program one row of Flash program memory
at a time. To do this, it is necessary to erase the 8-row
erase block containing the desired row. The general
process is:
1. Read eight rows of program memory
(512 instructions) and store in data RAM.
2. Update the program data in RAM with the
desired new data.
3. Erase the block (see Example 6-1):
a) Set the NVMOP bits (NVMCON<3:0>) to
‘0010’ to configure for block erase. Set the
ERASE (NVMCON<6>) and WREN
(NVMCON<14>) bits.
b) Write the starting address of the block to be
erased into the TBLPAG and W registers.
c) Write 55h to NVMKEY.
d) Write AAh to NVMKEY.
e) Set the WR bit (NVMCON<15>). The erase
cycle begins and the CPU stalls for the dura-
tion of the erase cycle. When the erase is
done, the WR bit is cleared automatically.
4. Write the first 64 instructions from data RAM into
the program memory buffers (see Example 6-3).
5. Write the program block to Flash memory:
a) Set the NVMOP bits to ‘0001’ to configure
for row programming. Clear the ERASE bit
and set the WREN bit.
b) Write 55h to NVMKEY.
c) Write AAh to NVMKEY.
d) Set the WR bit. The programming cycle
begins and the CPU stalls for the duration
of the write cycle. When the write to Flash
memory is done, the WR bit is cleared
automatically.
6. Repeat Steps 4 and 5, using the next available
64 instructions from the block in data RAM by
incrementing the value in TBLPAG, until all
512 instructions are written back to Flash
memory.
For protection against accidental operations, the write
initiate sequence for NVMKEY must be used to allow
any erase or program operation to proceed. After the
programming command has been executed, the user
must wait for the programming time until programming
is complete. The two instructions following the start of
the programming sequence should be NOPs, as shown
in Example 6-4.
EXAMPLE 6-1: ERASING A PROGRAM MEMORY BLOCK (ASSEMBLY LANGUAGE CODE)
; Set up NVMCON for block erase operation
MOV #0x4042, W0 ;
MOV W0, NVMCON ; Initialize NVMCON
; Init pointer to row to be ERASED
MOV #tblpage(PROG_ADDR), W0 ;
MOV W0, TBLPAG ; Initialize Program M emory (P M) Page B oundary SFR
MOV #tbloffset(PROG_ADDR), W0 ; Initialize in-page EA<15:0> pointer
TBLWTL W0, [W0] ; Set base address of erase block
DISI #5 ; Block all interrupts with priority <7
; for next 5 instructions
MOV.B #0x55, W0
MOV W0, NVMKEY ; Write the 0x55 key
MOV.B #0xAA, W1 ;
MOV W1, NVMKEY ; Write the 0xAA key
BSET NVMCON, #WR ; Start the erase sequence
NOP ; Insert two NOPs after the erase
NOP ; command is asserted
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EXAMPLE 6-2: ERASING A PROGRAM MEMORY BLOCK (‘C’ LANGUAGE CODE)
EXAMPLE 6-3: LOADING THE WRITE BUFFERS
EXAMPLE 6-4: INITIATING A PROGRAM MING SEQUENCE
// C example using MPLAB C30
unsigned long progAddr = 0xXXXXXX; // Address of row to write
unsigned int offset;
//Set up pointer to the first memory location to be written
TBLPAG = progAddr>>16; // Initialize PM Page Boundary SFR
offset = progAddr & 0xFFFF; // Initialize lower word of address
__builtin_tblwtl(offset, 0x0000); // Set base address of erase block
// with dummy latch write
NVMCON = 0x4042; // Initialize NVMCON
asm("DISI #5"); // Block all interrupts with priority <7
// for next 5 instructions
__builtin_write_NVM(); // check function to perform unlock
// sequence and set WR
; Set up NVMCON for row programming operations
MOV #0x4001, W0 ;
MOV W0, NVMCON ; Initialize NVMCON
; Set up a pointer to the first program memory location to be written
; program memory selected, and writes enabled
MOV #0x0000, W0 ;
MOV W0, TBLPAG ; Initialize PM Page Boundary SFR
MOV #0x6000, W0 ; An example program memory address
; Perform the TBLWT instructions to write the latches
; 0th_program_word
MOV #LOW_WORD_0, W2 ;
MOV #HIGH_BYTE_0, W3 ;
TBLWTL W2, [W0] ; Write PM low word into program latch
TBLWTH W3, [W0++] ; Write PM high byte into program latch
; 1st_program_word
MOV #LOW_WORD_1, W2 ;
MOV #HIGH_BYTE_1, W3 ;
TBLWTL W2, [W0] ; Write PM low word into program latch
TBLWTH W3, [W0++] ; Write PM high byte into program latch
; 2nd_program_word
MOV #LOW_WORD_2, W2 ;
MOV #HIGH_BYTE_2, W3 ;
TBLWTL W2, [W0] ; Write PM low word into program latch
TBLWTH W3, [W0++] ; Write PM high byte into program latch
•
•
•
; 63rd_program_word
MOV #LOW_WORD_63, W2 ;
MOV #HIGH_BYTE_63, W3 ;
TBLWTL W2, [W0] ; Write PM low word into program latch
TBLWTH W3, [W0] ; Write PM high byte into program latch
DISI #5 ; Block all interrupts with priority <7
; for next 5 instructions
MOV.B #0x55, W0
MOV W0, NVMKEY ; Write the 0x55 key
MOV.B #0xAA, W1 ;
MOV W1, NVMKEY ; Write the 0xAA key
BSET NVMCON, #WR ; Start the programming sequence
NOP ; Required delays
NOP
BTSC NVMCON, #15 ; and wait for it to be
BRA $-2 ; completed
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6.6.2 PROGRAMMING A SINGLE WORD
OF FLASH PROGRAM MEMORY
If a Flash location has been erased, it can be pro-
grammed using table write instructions to write an
instruction word (24-bit) into the write latch. The
TBLPAG register is loaded with the 8 Most Significant
Bytes (MSBs) of the Flash address. The TBLWTL and
TBLWTH instructions write the desired data into the
write latches and specify the lower 16 bits of the pro-
gram memory address to write to. To configure the
NVMCON register for a word write, set the NVMOP bits
(NVMCON<3:0>) to ‘0011’. The write is performed by
executing the unlock sequence and setting the WR bit
(see Example 6-5). An equivalent procedure in ‘C’
compiler, using the MPLAB C30 compiler and built-in
hardware functions, is shown in Example 6-6.
EXAMPLE 6-5: PROGRAMMING A SINGLE WORD OF FLASH PROGRAM MEMORY
EXAMPLE 6-6: PROGRAMMING A SINGLE WORD OF FLASH PROGRAM MEMORY
(‘C’ LANGUAGE CODE)
; Setup a pointer to data Program Memory
MOV #tblpage(PROG_ADDR), W0 ;
MOV W0, TBLPAG ;Initialize PM Page Boundary SFR
MOV #tbloffset(PROG_ADDR), W0 ;Initialize a register with program memory address
MOV #LOW_WORD_N, W2 ;
MOV #HIGH_BYTE_N, W3 ;
TBLWTL W2, [W0] ; Write PM low word into program latch
TBLWTH W3, [W0++] ; Write PM high byte into program latch
; Setup NVMCON for programming one word to data Program Memory
MOV #0x4003, W0 ;
MOV W0, NVMCON ; Set NVMOP bits to 0011
DISI #5 ; Disable interrupts while the KEY sequence is written
MOV.B #0x55, W0 ; Write the key sequence
MOV W0, NVMKEY
MOV.B #0xAA, W0
MOV W0, NVMKEY
BSET NVMCON, #WR ; Start the write cycle
NOP ; Required delays
NOP
// C example using MPLAB C30
unsigned int offset;
unsigned long progAddr = 0xXXXXXX; // Address of word to program
unsigned int progDataL = 0xXXXX; // Data to program lower word
unsigned char progDataH = 0xXX; // Data to program upper byte
//Set up NVMCON for word programming
NVMCON = 0x4003; // Initialize NVMCON
//Set up pointer to the first memory location to be written
TBLPAG = progAddr>>16; // Initialize PM Page Boundary SFR
offset = progAddr & 0xFFFF; // Initialize lower word of address
//Perform TBLWT instructions to write latches
__builtin_tblwtl(offset, progDataL); // Write to address low word
__builtin_tblwth(offset, progDataH); // Write to upper byte
asm(“DISI #5”); // Block interrupts with priority <7
// for next 5 instructions
__builtin_write_NVM(); // C30 function to perform unlock
// sequence and set WR
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7.0 RESETS
The Reset module combines all Reset sources and
controls the device Master Reset Signal, SYSRST. The
following is a list of device Reset sources:
• POR: Power-on Reset
•MCLR
: Pin Reset
•SWR: RESET Instruction
• WDT: Watchdog Timer Reset
• BOR: Brown-out Reset
• CM: Configuration Mismatch Reset
• TRAPR: Trap Conflict Reset
• IOPUWR: Illegal Opcode Reset
• UWR: Uninitialized W Register Reset
A simplified block diagram of the Reset module is
shown in Figure 7-1.
Any active source of Reset will make the SYSRST
signal active. Many registers associated with the CPU
and peripherals are forced to a known Reset state.
Most registers are unaffected by a Reset; their status is
unknown on POR and unchanged by all other Resets.
All types of device Reset will set a corresponding status
bit in the RCON register to indicate the type of Reset
(see Register 7-1). In addition, Reset events occurring
while an extreme power-saving feature is in use (such
as VBAT) will set one or more status bits in the RCON2
register (Register 7-2). A POR will clear all bits, except
for the BOR and POR (RCON<1:0>) bits, which are
set. The user may set or clear any bit at any time during
code execution. The RCON bits only serve as status
bits. Setting a particular Reset status bit in software will
not cause a device Reset to occur.
The RCON register also has other bits associated with
the Watchdog Timer and device power-saving states.
The function of these bits is discussed in other sections
of this data sheet.
FIGURE 7-1: RESET SYSTEM BLOCK DIAGRAM
Note: This data sheet summarizes the features of
this group of PIC24F devices. It is not
intended to be a comprehensive reference
source. For more information, refer to the
“PIC24F Family Reference Manual”,
Section 7. “Reset” (DS39712). The infor-
mation in this data sheet supersedes the
information in the FRM.
Note: Refer to the specific peripheral or CPU
section of this manual for register Reset
states.
Note: The status bits in the RCON registers
should be cleared after they are read so
that the next RCON register values after a
device Reset will be meaningful.
MCLR
VDD
VDD Rise
Detect
POR
Sleep or Idle
Brown-out
Reset
Enable Voltage Regulator
RESET
Instruction
WDT
Module
Glitch Filter
BOR
Trap Conflict
Illegal Opcode
Uninitialized W Register
SYSRST
Configuration Mismatch
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DS39996F-page 90 2010-2011 Microchip Technology Inc.
REGISTER 7-1: RCON: RESET CONTROL REGISTER
R/W-0 R/W-0 U-0 R/W-0 U-0 R/W-0 R/W-0 R/W-0
TRAPR(1)IOPUWR(1)— RETEN(2)— DPSLP(1)CM(1)VREGS(3)
bit 15 bit 8
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-1 R/W-1
EXTR(1)SWR(1)SWDTEN(4)WDTO(1)SLEEP(1)IDLE(1)BOR(1)POR(1)
bit 7 bit 0
Legend: U = Unimplemented bit, read as ‘0’
R = Readable bit W = Writable bit HS = Hardware Settable bit
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 TRAPR: Trap Reset Flag bit(1)
1 = A Trap Conflict Reset has occurred
0 = A Trap Conflict Reset has not occurred
bit 14 IOPUWR: Illegal Opcode or Uninitialized W Access Reset Flag bit(1)
1 = An illegal opcode detection, an illegal address mode or uninitialized W register is used as an
Address Pointer and caused a Reset
0 = An illegal opcode or uninitialized W Reset has not occurred
bit 13-10 Unimplemented: Read as ‘0’
bit 12 RETEN: Retention Mode Enable bit(2)
1 = Retention mode is enabled while device is in Sleep modes (1.2V regulator supplies to the core)
0 = Retention mode is disabled; normal voltage levels are present
bit 11 Unimplemented: Read as ‘0’
bit 10 DPSLP: Deep Sleep Flag bit(1)
1 = Device has been in Deep Sleep mode
0 = Device has not been in Deep Sleep mode
bit 9 CM: Configuration Word Mismatch Reset Flag bit(1)
1 = A Configuration Word Mismatch Reset has occurred
0 = A Configuration Word Mismatch Reset has not occurred
bit 8 VREGS: Program Memory Power During Sleep bit(3)
1 = Program memory bias voltage remains powered during Sleep
0 = Program memory bias voltage is powered down during Sleep
bit 7 EXTR: External Reset (MCLR) Pin bit(1)
1 = A Master Clear (pin) Reset has occurred
0 = A Master Clear (pin) Reset has not occurred
bit 6 SWR: Software Reset (Instruction) Flag bit(1)
1 =A RESET instruction has been executed
0 =A RESET instruction has not been executed
Note 1: All of the Reset status bits may be set or cleared in software. Setting one of these bits in software does not
cause a device Reset.
2: If the LPCFG Configuration bit is 1’ (unprogrammed), the retention regulator is disabled and the RETEN bit
has no effect.
3: Re-enabling the regulator after it enters Standby mode will add a delay, TVREG, when waking up from
Sleep. Applications that do not use the voltage regulator should set this bit to prevent this delay from
occurring.
4: If the FWDTEN Configuration bit is ‘1’ (unprogrammed), the WDT is always enabled, regardless of the
SWDTEN bit setting.
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bit 5 SWDTEN: Software Enable/Disable of WDT bit(4)
1 = WDT is enabled
0 = WDT is disabled
bit 4 WDTO: Watchdog Timer Time-out Flag bit(1)
1 = WDT time-out has occurred
0 = WDT time-out has not occurred
bit 3 SLEEP: Wake From Sleep Flag bit(1)
1 = Device has been in Sleep mode
0 = Device has not been in Sleep mode
bit 2 IDLE: Wake-up From Idle Flag bit(1)
1 = Device has been in Idle mode
0 = Device has not been in Idle mode
bit 1 BOR: Brown-out Reset Flag bit(1)
1 = A Brown-out Reset has occurred (also set after a Power-on Reset).
0 = A Brown-out Reset has not occurred
bit 0 POR: Power-on Reset Flag bit(1)
1 = A Power-on Reset has occurred
0 = A Power-on Reset has not occurred
REGISTER 7-1: RCON: RESET CONTROL REGISTER (CONTINUED)
Note 1: All of the Reset status bits may be set or cleared in software. Setting one of these bits in software does not
cause a device Reset.
2: If the LPCFG Configuration bit is 1’ (unprogrammed), the retention regulator is disabled and the RETEN bit
has no effect.
3: Re-enabling the regulator after it enters Standby mode will add a delay, TVREG, when waking up from
Sleep. Applications that do not use the voltage regulator should set this bit to prevent this delay from
occurring.
4: If the FWDTEN Configuration bit is ‘1’ (unprogrammed), the WDT is always enabled, regardless of the
SWDTEN bit setting.
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REGISTER 7-2: RCON2: RESET AND SYSTEM CONTROL REGISTER 2
U-0 U-0 U-0 U-0 U-0 U-0 U-0 U-0
— — — — — — — —
bit 15 bit 8
U-0 U-0 U-0 r-0 R/CO-1 R/CO-1 R/CO-1 R/CO-0
— — — r VDDBOR(1)VDDPOR(1,2)VBPOR(1,3)VBAT(1)
bit 7 bit 0
Legend: CO = Clearable Only bit r = Reserved bit
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-5 Unimplemented: Read as ‘0’
bit 4 Reserved: Maintain as ‘0’
bit 3 VDDBOR: VDD Brown-out Reset Flag bit(1)
1 =A VDD Brown-out Reset has occurred (set by hardware)
0 =A V
DD Brown-out Reset has not occurred
bit 2 VDDPOR: VDD Power-On Reset Flag bit(1,2)
1 =A VDD Power-up Reset has occurred (set by hardware)
0 =A V
DD Power-up Reset has not occurred
bit 1 VBPOR: VBPOR Flag bit(1,3)
1 =A VBAT POR has occurred (no battery connected to VBAT pin, or VBAT power below Deep Sleep
Semaphore retention level, set by hardware)
0 =A V
BAT POR has not occurred
bit 0 VBAT: VBAT Flag bit(1)
1 = A POR exit has occurred while power was applied to VBAT pin (set by hardware)
0 = A POR exit from VBAT has not occurred
Note 1: This bit is set in hardware only; it can only be cleared in software.
2: Indicates a VDD POR. Setting the POR bit (RCON<0>) indicates a VCORE POR.
3: This bit is set when the device is originally powered up, even if power is present on VBAT.
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TABLE 7-1: RESET FLAG BIT OPERATION
7.1 Special Function Register Reset
States
Most of the Special Function Registers (SFRs) associ-
ated with the PIC24F CPU and peripherals are reset to a
particular value at a device Reset. The SFRs are
grouped by their peripheral or CPU function and their
Reset values are specified in each section of this manual.
The Reset value for each SFR does not depend on the
type of Reset, with the exception of four registers. The
Reset value for the Reset Control register, RCON, will
depend on the type of device Reset. The Reset value
for the Oscillator Control register, OSCCON, will
depend on the type of Reset and the programmed
values of the FNOSC bits in Flash Configuration
Word 2 (CW2) (see Table 7-2). The RCFGCAL and
NVMCON registers are only affected by a POR.
7.2 Device Reset T imes
The Reset times for various types of device Reset are
summarized in Ta b l e 7 - 3 . Note that the system Reset
signal, SYSRST, is released after the POR delay time
expires.
The time at which the device actually begins to execute
code will also depend on the system oscillator delays,
which include the Oscillator Start-up Timer (OST) and
the PLL lock time. The OST and PLL lock times occur
in parallel with the applicable SYSRST delay times.
The Fail-Safe Clock Monitor (FSCM) delay determines
the time at which the FSCM begins to monitor the
system clock source after the SYSRST signal is
released.
7.3 Brown-out Reset (BOR)
PIC24FJ128GA310 family devices implement a BOR
circuit that provides the user with several configuration
and power-saving options. The BOR is controlled by
the BOREN (CW3<12>) Configuration bit.
When BOR is enabled, any drop of VDD below the BOR
threshold results in a device BOR. Threshold levels are
described in Section 32.1 “DC Characteristics”
(Parameter DC17).
7.4 Clock Source Selection at Reset
If clock switching is enabled, the system clock source
at device Reset is chosen, as shown in Table 7-2. If
clock switching is disabled, the system clock source is
always selected according to the Oscillator Configura-
tion bits. Refer to the “PIC24F Family Reference
Manual”, Section 6.0 “Oscillator” (DS39700) for
further details.
TABLE 7-2: OSCILLATOR SELECTION vs.
TYPE OF RESET (CLOCK
SWITCHING ENAB LED)
Flag Bit Setting Event Clearing Event
TRAPR (RCON<15>) Trap Conflict Event POR
IOPUWR (RCON<14>) Illegal Opcode or Uninitialized W Register Access POR
CM (RCON<9>) Configuration Mismatch Reset POR
EXTR (RCON<7>) MCLR Reset POR
SWR (RCON<6>) RESET Instruction POR
WDTO (RCON<4>) WDT Time-out CLRWDT, PWRSAV
Instruction, POR
SLEEP (RCON<3>) PWRSAV #0 Instruction POR
DPSLP (RCON<10>) PWRSAV #0 Instruction while DSEN bit set POR
IDLE (RCON<2>) PWRSAV #1 Instruction POR
BOR (RCON<1>) POR, BOR —
POR (RCON<0>) POR —
Note: All Reset flag bits may be set or cleared by the user software.
Reset Type Clock Source Determinant
POR FNOSC Configuration bits
(CW2<10:8>)
BOR
MCLR
COSC Control bits
(OSCCON<14:12>)
WDTO
SWR
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TABLE 7-3: RESET DELAY TIMES FOR VARIOUS DEVICE RESETS
7.4.1 POR AND LONG OSCILLATOR
START-UP TIMES
The oscillator start-up circuitry and its associated delay
timers are not linked to the device Reset delays that
occur at power-up. Some crystal circuits (especially
low-frequency crystals) will have a relatively long
start-up time. Therefore, one or more of the following
conditions is possible after SYSRST is released:
• The oscillator circuit has not begun to oscillate.
• The Oscillator Start-up Timer has not expired (if a
crystal oscillator is used).
• The PLL has not achieved a lock (if PLL is used).
The device will not begin to execute code until a valid
clock source has been released to the system. There-
fore, the oscillator and PLL start-up delays must be
considered when the Reset delay time must be known.
7.4.2 FAIL-SAFE CLOCK MONITOR
(FSCM) AND DEVICE RESETS
If the FSCM is enabled, it will begin to monitor the
system clock source when SYSRST is released. If a
valid clock source is not available at this time, the
device will automatically switch to the FRC oscillator
and the user can switch to the desired crystal oscillator
in the Trap Service Routine (TSR).
Reset Type Clock Source SYSRST Delay System Clock
Delay Notes
POR EC TPOR + TSTARTUP + TRST —1, 2, 3
ECPLL TPOR + TSTARTUP + TRST TLOCK 1, 2, 3, 5
XT, HS, SOSC TPOR + TSTARTUP + TRST TOST 1, 2, 3, 4, 8
XTPLL, HSPLL TPOR + TSTARTUP + TRST TOST + TLOCK 1, 2, 3, 4, 5, 8
FRC, FRCDIV TPOR + TSTARTUP + TRST TFRC 1, 2, 3, 6, 7
FRCPLL TPOR + TSTARTUP + TRST TFRC + TLOCK 1, 2, 3, 5, 6
LPRC TPOR + TSTARTUP + TRST TLPRC 1, 2, 3, 6
BOR EC TSTARTUP + TRST —2, 3
ECPLL TSTARTUP + TRST TLOCK 2, 3, 5
XT, HS, SOSC TSTARTUP + TRST TOST 2, 3, 4, 8
XTPLL, HSPLL TSTARTUP + TRST TOST + TLOCK 2, 3, 4, 5, 8
FRC, FRCDIV TSTARTUP + TRST TFRC 2, 3, 6, 7
FRCPLL TSTARTUP + TRST TFRC + TLOCK 2, 3, 5, 6
LPRC TSTARTUP + TRST TLPRC 2, 3, 6
MCLR Any Clock TRST —3
WDT Any Clock TRST —3
Software Any clock TRST —3
Illegal Opcode Any Clock TRST —3
Uninitialized W Any Clock TRST —3
Trap Conflict Any Clock TRST —3
Note 1: TPOR = Power-on Reset delay (10 s nominal).
2: TSTARTUP = TVREG (10 s nominal when VREGS = 1 and when VREGS = 0; depends upon
WDTWIN<1:0> bits setting).
3: TRST = Internal State Reset time (2 s nominal).
4: T
OST = Oscillator Start-up Timer (OST). A 10-bit counter counts 1024 oscillator periods before releasing
the oscillator clock to the system.
5: TLOCK = PLL lock time.
6: TFRC and TLPRC = RC oscillator start-up times.
7: If Two-speed Start-up is enabled, regardless of the primary oscillator selected, the device starts with FRC
so the system clock delay is just TFRC, and in such cases, FRC start-up time is valid. It switches to the
primary oscillator after its respective clock delay.
8: T
OST = Oscillator Start-up Timer (OST). A 10-bit counter waits 1024 oscillator periods before releasing the
oscillator clock to the system.
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8.0 INTERRUPT CONTROLLER
The PIC24F interrupt controller reduces the numerous
peripheral interrupt request signals to a single interrupt
request signal to the PIC24F CPU. It has the following
features:
• Up to 8 processor exceptions and software traps
• Seven user-selectable priority levels
• Interrupt Vector Table (IVT) with up to 118 vectors
• Unique vector for each interrupt or exception
source
• Fixed priority within a specified user priority level
• Alternate Interrupt Vector Table (AIVT) for debug
support
• Fixed interrupt entry and return latencies
8.1 Interrupt Vector Table
The Interrupt Vector Table (IVT) is shown in Figure 8-1.
The IVT resides in program memory, starting at location,
000004h. The IVT contains 126 vectors, consisting of
8 non-maskable trap vectors, plus up to 118 sources of
interrupt. In general, each interrupt source has its own
vector. Each interrupt vector contains a 24-bit wide
address. The value programmed into each interrupt vec-
tor location is the starting address of the associated
Interrupt Service Routine (ISR).
Interrupt vectors are prioritized in terms of their natural
priority; this is linked to their position in the vector table.
All other things being equal, lower addresses have a
higher natural priority. For example, the interrupt asso-
ciated with Vector 0 will take priority over interrupts at
any other vector address.
PIC24FJ128GA310 family devices implement
non-maskable traps and unique interrupts. These are
summarized in Ta b l e 8 - 1 and Table 8-2.
8.1.1 ALTERNATE INTERRUPT VECTOR
TABL E
The Alternate Interrupt Vector Table (AIVT) is located
after the IVT, as shown in Figure 8-1. The ALTIVT
(INTCON2<15>) control bit provides access to the
AIVT. If the ALTIVT bit is set, all interrupt and exception
processes will use the alternate vectors instead of the
default vectors. The alternate vectors are organized in
the same manner as the default vectors.
The AIVT supports emulation and debugging efforts by
providing a means to switch between an application
and a support environment without requiring the inter-
rupt vectors to be reprogrammed. This feature also
enables switching between applications for evaluation
of different software algorithms at run time. If the AIVT
is not needed, the AIVT should be programmed with
the same addresses used in the IVT.
8.2 Reset Sequence
A device Reset is not a true exception because the
interrupt controller is not involved in the Reset process.
The PIC24F devices clear their registers in response to
a Reset, which forces the PC to zero. The micro-
controller then begins program execution at location,
000000h. The user programs a GOTO instruction at the
Reset address, which redirects program execution to
the appropriate start-up routine.
Note: This data sheet summarizes the features of
this group of PIC24F devices. It is not
intended to be a comprehensive reference
source. For more information, refer to the
“PIC24F Family Reference Manual”,
Section 8. “Interrupts” (DS39707). The
information in this data sheet supersedes
the information in the FRM.
Note: Any unimplemented or unused vector
locations in the IVT and AIVT should be
programmed with the address of a default
interrupt handler routine that contains a
RESET instruction.
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FIGURE 8-1: PIC24F INTERRUPT VECTOR TABLE
TABLE 8-1: TRAP VECTOR DETAILS
Vector Number IVT Address AIVT Address Trap Source
0 000004h 000104h Reserved
1 000006h 000106h Oscillator Failure
2 000008h 000108h Address Error
3 00000Ah 00010Ah Stack Error
4 00000Ch 00010Ch Math Error
5 00000Eh 00010Eh Reserved
6 000010h 000110h Reserved
7 000012h 000112h Reserved
Note 1: See Table 8-2 for the interrupt vector list.
Reset – GOTO Instruction 000000h
Reset – GOTO Address 000002h
Reserved 000004h
Oscillator Fail Trap Vector
Address Error Trap Vector
Stack Error Trap Vector
Math Error Trap Vector
Reserved
Reserved
Reserved
Interrupt Vector 0 000014h
Interrupt Vector 1
—
—
—
Interrupt Vector 52 00007Ch
Interrupt Vector 53 00007Eh
Interrupt Vector 54 000080h
—
—
—
Interrupt Vector 116 0000FCh
Interrupt Vector 117 0000FEh
Reserved 000100h
Reserved 000102h
Reserved
Oscillator Fail Trap Vector
Address Error Trap Vector
Stack Error Trap Vector
Math Error Trap Vector
Reserved
Reserved
Reserved
Interrupt Vector 0 000114h
Interrupt Vector 1
—
—
—
Interrupt Vector 52 00017Ch
Interrupt Vector 53 00017Eh
Interrupt Vector 54 000180h
—
—
—
Interrupt Vector 116
Interrupt Vector 117 0001FEh
Start of Code 000200h
Decreasing Natural Order Priority
Interrupt Vector Table (IVT)(1)
Alternate Interrupt Vector Table (AIVT)(1)
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TABLE 8-2: IMPLEMENTED INTERRUPT VECTORS
Interrupt Source Vector
Number IVT
Address AIVT
Address
Interrupt Bit Locations
Flag Enable Priority
ADC1 Conversion Done 13 00002Eh 00012Eh IFS0<13> IEC0<13> IPC3<6:4>
Comparator Event 18 000038h 000138h IFS1<2> IEC1<2> IPC4<10:8>
CRC Generator 67 00009Ah 00019Ah IFS4<3> IEC4<3> IPC16<14:12>
CTMU Event 77 0000AEh 0001AEh IFS4<13> IEC4<13> IPC19<6:4>
DMA Channel 0 4 00001Ch 00011Ch IFS0<4> IEC0<4> IPC1<2:0>
DMA Channel 1 14 000030h 000130h IFS0<14> IEC0<14> IPC3<10:8>
DMA Channel 2 24 000044h 000144h IFS1<8> IEC1<8> IPC6<2:0>
DMA Channel 3 36 00005Ch 00015Ch IFS2<4> IEC2<4> IPC9<2:0>
DMA Channel 4 46 000070h 000170h IFS2<14> IEC2<14> IPC11<10:8>
DMA Channel 5 61 00008Eh 00018Eh IFS3<13> IEC3<13> IPC15<6:4>
External Interrupt 0 0 000014h 000114h IFS0<0> IEC0<0> IPC0<2:0>
External Interrupt 1 20 00003Ch 00013Ch IFS1<4> IEC1<4> IPC5<2:0>
External Interrupt 2 29 00004Eh 00014Eh IFS1<13> IEC1<13> IPC7<6:4>
External Interrupt 3 53 00007Eh 00017Eh IFS3<5> IEC3<5> IPC13<6:4>
External Interrupt 4 54 000080h 000180h IFS3<6> IEC3<6> IPC13<10:8>
I2C1 Master Event 17 000036h 000136h IFS1<1> IEC1<1> IPC4<6:4>
I2C1 Slave Event 16 000034h 000134h IFS1<0> IEC1<0> IPC4<2:0>
I2C2 Master Event 50 000078h 000178h IFS3<2> IEC3<2> IPC12<10:8>
I2C2 Slave Event 49 000076h 000176h IFS3<1> IEC3<1> IPC12<6:4>
Input Capture 1 1 000016h 000116h IFS0<1> IEC0<1> IPC0<6:4>
Input Capture 2 5 00001Eh 00011Eh IFS0<5> IEC0<5> IPC1<6:4>
Input Capture 3 37 00005Eh 00015Eh IFS2<5> IEC2<5> IPC9<6:4>
Input Capture 4 38 000060h 000160h IFS2<6> IEC2<6> IPC9<10:8>
Input Capture 5 39 000062h 000162h IFS2<7> IEC2<7> IPC9<14:12>
Input Capture 6 40 000064h 000164h IFS2<8> IEC2<8> IPC10<2:0>
Input Capture 7 22 000040h 000140h IFS1<6> IEC1<6> IPC5<10:8>
JTAG 117 0000FEh 0001FEh IFS7<5> IEC7<5> IPC29<6:4>
Input Change Notification (ICN) 19 00003Ah 00013Ah IFS1<3> IEC1<3> IPC4<14:12>
LCD Controller 100 0000DCh 0001DCh IFS6<4> IEC6<4> IPC25<2:0>
Low-Voltage Detect (LVD) 72 0000A4h 0001A4h IFS4<8> IEC4<8> IPC18<2:0>
Output Compare 1 2 000018h 000118h IFS0<2> IEC0<2> IPC0<10:8>
Output Compare 2 6 000020h 000120h IFS0<6> IEC0<6> IPC1<10:8>
Output Compare 3 25 000046h 000146h IFS1<9> IEC1<9> IPC6<6:4>
Output Compare 4 26 000048h 000148h IFS1<10> IEC1<10> IPC6<10:8>
Output Compare 5 41 000066h 000166h IFS2<9> IEC2<9> IPC10<6:4>
Output Compare 6 42 000068h 000168h IFS2<10> IEC2<10> IPC10<10:8>
Output Compare 7 43 00006Ah 00016Ah IFS2<11> IEC2<11> IPC10<14:12>
Enhanced Parallel Master Port (EPMP) 45 00006Eh 00016Eh IFS2<13> IEC2<13> IPC11<6:4>
Real-Time Clock and Calendar (RTCC) 62 000090h 000190h IFS3<14> IEC3<14> IPC15<10:8>
SPI1 Error 9 000026h 000126h IFS0<9> IEC0<9> IPC2<6:4>
SPI1 Event 10 000028h 000128h IFS0<10> IEC0<10> IPC2<10:8>
SPI2 Error 32 000054h 000154h IFS2<0> IEC2<0> IPC8<2:0>
SPI2 Event 33 000056h 000156h IFS2<1> IEC2<1> IPC8<6:4>
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8.3 Interrupt Control and Status
Registers
The PIC24FJ128GA310 family of devices implements
a total of 43 registers for the interrupt controller:
• INTCON1
• INTCON2
• IFS0 through IFS7
• IEC0 through IEC7
• IPC0 through IPC13, ICP15 and ICP16, ICP18
through ICP23, ICP25 and ICP29
•INTTREG
Global interrupt control functions are controlled from
INTCON1 and INTCON2. INTCON1 contains the Inter-
rupt Nesting Disable (NSTDIS) bit, as well as the
control and status flags for the processor trap sources.
The INTCON2 register controls the external interrupt
request signal behavior and the use of the Alternate
Interrupt Vector Table (AIVT).
The IFSx registers maintain all of the interrupt request
flags. Each source of interrupt has a status bit, which is
set by the respective peripherals or an external signal
and is cleared via software.
The IECx registers maintain all of the interrupt enable
bits. These control bits are used to individually enable
interrupts from the peripherals or external signals.
The IPCx registers are used to set the interrupt priority
level for each source of interrupt. Each user interrupt
source can be assigned to one of eight priority levels.
The INTTREG register contains the associated
interrupt vector number and the new CPU interrupt
priority level, which are latched into the Vector
Number (VECNUM<6:0>) and the Interrupt Level
(ILR<3:0>) bit fields in the INTTREG register. The
new interrupt priority level is the priority of the
pending interrupt.
The interrupt sources are assigned to the IFSx, IECx
and IPCx registers in the order of their vector numbers,
as shown in Tab l e 8 - 2 . For example, the INT0 (External
Interrupt 0) is shown as having a vector number and a
natural order priority of 0. Thus, the INT0IF status bit is
found in IFS0<0>, the INT0IE enable bit in IEC0<0>
and the INT0IP<2:0> priority bits in the first position of
IPC0 (IPC0<2:0>).
Although they are not specifically part of the interrupt
control hardware, two of the CPU Control registers con-
tain bits that control interrupt functionality. The ALU
STATUS Register (SR) contains the IPL<2:0> bits
(SR<7:5>). These indicate the current CPU interrupt
priority level. The user can change the current CPU
priority level by writing to the IPL bits.
Timer1 3 00001Ah 00011Ah IFS0<3> IEC0<3> IPC0<14:12>
Timer2 7 000022h 000122h IFS0<7> IEC0<7> IPC1<14:12>
Timer3 8 000024h 000124h IFS0<8> IEC0<8> IPC2<2:0>
Timer4 27 00004Ah 00014Ah IFS1<11> IEC1<11> IPC6<14:12>
Timer5 28 00004Ch 00014Ch IFS1<12> IEC1<12> IPC7<2:0>
UART1 Error 65 000096h 000196h IFS4<1> IEC4<1> IPC16<6:4>
UART1 Receiver 11 00002Ah 00012Ah IFS0<11> IEC0<11> IPC2<14:12>
UART1 Transmitter 12 00002Ch 00012Ch IFS0<12> IEC0<12> IPC3<2:0>
UART2 Error 66 000098h 000198h IFS4<2> IEC4<2> IPC16<10:8>
UART2 Receiver 30 000050h 000150h IFS1<14> IEC1<14> IPC7<10:8>
UART2 Transmitter 31 000052h 000152h IFS1<15> IEC1<15> IPC7<14:12>
UART3 Error 81 0000B6h 0001B6h IFS5<1> IEC5<1> IPC20<6:4>
UART3 Receiver 82 0000B8h 0001B8h IFS5<2> IEC5<2> IPC20<10:8>
UART3 Transmitter 83 0000BAh 0001BAh IFS5<3> IEC5<3> IPC20<14:12>
UART4 Error 87 0000C2h 0001C2h IFS5<7> IEC5<7> IPC21<14:12>
UART4 Receiver 88 0000C4h 0001C4h IFS5<8> IEC5<8> IPC22<2:0>
UART4 Transmitter 89 0000C6h 0001C6h IFS5<9> IEC5<9> IPC22<6:4>
TABLE 8-2: IMPLEMENTED INTERRUPT VECTORS (CONTINUED)
Interrupt Source Vector
Number IVT
Address AIVT
Address
Interrupt Bit Locations
Flag Enable Priority
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The CORCON register contains the IPL3 bit, which
together with the IPL<2:0> bits, indicate the current
CPU priority level. IPL3 is a read-only bit so that trap
events cannot be masked by the user software.
The interrupt controller has the Interrupt Controller Test
register, INTTREG, which displays the status of the
interrupt controller. When an interrupt request occurs,
it’s associated vector number and the new interrupt
priority level are latched into INTTREG. This informa-
tion can be used to determine a specific interrupt
source if a generic ISR is used for multiple vectors
(such as when ISR remapping is used in bootloader
applications) or to check if another interrupt is pending
while in an ISR.
All interrupt registers are described in Register 8-1
through Register 8-44 in the succeeding pages.
REGISTER 8-1: SR: ALU STATUS REGISTER (IN CPU)
U-0 U-0 U-0 U-0 U-0 U-0 U-0 R-0
— — — — — — — DC(1)
bit 15 bit 8
R/W-0 R/W-0 R/W-0 R-0 R/W-0 R/W-0 R/W-0 R/W-0
IPL2(2,3)IPL1(2,3)IPL0(2,3)RA(1)N(1)OV(1)Z(1)C(1)
bit 7 bit 0
Legend: HSC = Hardware Settable/Clearable bit
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-9 Unimplemented: Read as ‘0’
bit 7-5 IPL<2:0>: CPU Interrupt Priority Level Status bits(2,3)
111 = CPU interrupt priority level is 7 (15); user interrupts are disabled
110 = CPU interrupt priority level is 6 (14)
101 = CPU interrupt priority level is 5 (13)
100 = CPU interrupt priority level is 4 (12)
011 = CPU interrupt priority level is 3 (11)
010 = CPU interrupt priority level is 2 (10)
001 = CPU interrupt priority level is 1 (9)
000 = CPU interrupt priority level is 0 (8)
Note 1: See Register 3-1 for the description of the remaining bits (bits 8, 4, 3, 2, 1 and 0) that are not dedicated to
interrupt control functions.
2: The IPL bits are concatenated with the IPL3 (CORCON<3>) bit to form the CPU interrupt priority level.
The value in parentheses indicates the interrupt priority level if IPL3 = 1.
3: The IPL Status bits are read-only when NSTDIS (INTCON1<15>) = 1.
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REGISTER 8-2: CORCON: CPU CONTROL REGISTER
U-0 U-0 U-0 U-0 U-0 U-0 U-0 U-0
— — — — — — — —
bit 15 bit 8
U-0 U-0 U-0 U-0 R/C-0 r-1 U-0 U-0
— — — —IPL3
(1)r — —
bit 7 bit 0
Legend: r = Reserved bit
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-4 Unimplemented: Read as ‘0’
bit 3 IPL3: CPU Interrupt Priority Level Status bit(1)
1 = CPU interrupt priority level is greater than 7
0 = CPU interrupt priority level is 7 or less
bit 2 Reserved: Read as ‘1’
bit 1-0 Unimplemented: Read as ‘0’
Note 1: The IPL3 bit is concatenated with the IPL<2:0> bits (SR<7:5>) to form the CPU interrupt priority level; see
Register 3-2 for bit description.
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REGISTER 8-3: INTCON1: INTERRUPT CONTROL REGISTER 1
R/W-0 U-0 U-0 U-0 U-0 U-0 U-0 U-0
NSTDIS — — — — — — —
bit 15 bit 8
U-0 U-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 U-0
— — — MATHERR ADDRERR STKERR OSCFAIL —
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 NSTDIS: Interrupt Nesting Disable bit
1 = Interrupt nesting is disabled
0 = Interrupt nesting is enabled
bit 14-5 Unimplemented: Read as ‘0’
bit 4 MATHERR: Arithmetic Error Trap Status bit
1 = Overflow trap has occurred
0 = Overflow trap has not occurred
bit 3 ADDRERR: Address Error Trap Status bit
1 = Address error trap has occurred
0 = Address error trap has not occurred
bit 2 STKERR: Stack Error Trap Status bit
1 = Stack error trap has occurred
0 = Stack error trap has not occurred
bit 1 OSCFAIL: Oscillator Failure Trap Status bit
1 = Oscillator failure trap has occurred
0 = Oscillator failure trap has not occurred
bit 0 Unimplemented: Read as ‘0’
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REGISTER 8-4: INTCON2: INTERRUPT CONTROL REGISTER 2
R/W-0 R-0, HSC U-0 U-0 U-0 U-0 U-0 U-0
ALTIVT DISI — — — — — —
bit 15 bit 8
U-0 U-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
— — — INT4EP INT3EP INT2EP INT1EP INT0EP
bit 7 bit 0
Legend: HSC = Hardware Settable/Clearable bit
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 ALTIVT: Enable Alternate Interrupt Vector Table bit
1 = Use Alternate Interrupt Vector Table
0 = Use standard (default) Interrupt Vector Table
bit 14 DISI: DISI Instruction Status bit
1 = DISI instruction is active
0 = DISI instruction is not active
bit 13-5 Unimplemented: Read as ‘0’
bit 4 INT4EP: External Interrupt 4 Edge Detect Polarity Select bit
1 = Interrupt on negative edge
0 = Interrupt on positive edge
bit 3 INT3EP: External Interrupt 3 Edge Detect Polarity Select bit
1 = Interrupt on negative edge
0 = Interrupt on positive edge
bit 2 INT2EP: External Interrupt 2 Edge Detect Polarity Select bit
1 = Interrupt on negative edge
0 = Interrupt on positive edge
bit 1 INT1EP: External Interrupt 1 Edge Detect Polarity Select bit
1 = Interrupt on negative edge
0 = Interrupt on positive edge
bit 0 INT0EP: External Interrupt 0 Edge Detect Polarity Select bit
1 = Interrupt on negative edge
0 = Interrupt on positive edge
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REGISTER 8-5: IFS0: INTERRUPT FLAG STATUS REGISTER 0
U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
— DMA1IF AD1IF U1TXIF U1RXIF SPI1IF SPF1IF T3IF
bit 15 bit 8
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0, R/W-0 R/W-0
T2IF OC2IF IC2IF DMA0IF T1IF OC1IF IC1IF INT0IF
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 Unimplemented: Read as ‘0’
bit 14 AD1IF: A/D Conversion Complete Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 13 DMA1IF: DMA Channel 1 Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 12 U1TXIF: UART1 Transmitter Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 11 U1RXIF: UART1 Receiver Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 10 SPI1IF: SPI1 Event Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 9 SPF1IF: SPI1 Fault Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 8 T3IF: Timer3 Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 7 T2IF: Timer2 Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 6 OC2IF: Output Compare Channel 2 Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 5 IC2IF: Input Capture Channel 2 Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 4 DMA0IF: DMA Channel 0 Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 3 T1IF: Timer1 Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
PIC24FJ128GA310 FAMILY
DS39996F-page 104 2010-2011 Microchip Technology Inc.
bit 2 OC1IF: Output Compare Channel 1 Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 1 IC1IF: Input Capture Channel 1 Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 0 INT0IF: External Interrupt 0 Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
REGISTER 8-5: IFS0: INTERRUPT FLAG STATUS REGISTER 0 (CONTINUED)
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REGISTER 8-6: IFS1: INTERRUPT FLAG STATUS REGISTER 1
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
U2TXIF U2RXIF INT2IF T5IF T4IF OC4IF OC3IF DMA2IF
bit 15 bit 8
R/W-0 R/W-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
—IC7IF— INT1IF CNIF CMIF MI2C1IF SI2C1IF
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 U2TXIF: UART2 Transmitter Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 14 U2RXIF: UART2 Receiver Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 13 INT2IF: External Interrupt 2 Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 12 T5IF: Timer5 Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 11 T4IF: Timer4 Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 10 OC4IF: Output Compare Channel 4 Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 9 OC3IF: Output Compare Channel 3 Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 8 DMA2IF: DMA Channel 2 Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 7 Unimplemented: Read as ‘0’
bit 6 IC7IF: Input Capture Channel 7 Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 5 Unimplemented: Read as ‘0’
bit 4 INT1IF: External Interrupt 1 Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 3 CNIF: Input Change Notification Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
PIC24FJ128GA310 FAMILY
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bit 2 CMIF: Comparator Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 1 MI2C1IF: Master I2C1 Event Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 0 SI2C1IF: Slave I2C1 Event Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
REGISTER 8-6: IFS1: INTERRUPT FLAG STATUS REGISTER 1 (CONTINUED)
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REGISTER 8-7: IFS2: INTERRUPT FLAG STATUS REGISTER 2
U-0 R/W-0 R/W-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0
—DMA4IFPMPIF — OC7IF OC6IF OC5IF IC6IF
bit 15 bit 8
R/W-0 R/W-0 R/W-0 R/W-0 U-0 U-0 R/W-0 R/W-0
IC5IF IC4IF IC3IF DMA3IF —— SPI2IF SPF2IF
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 Unimplemented: Read as ‘0’
bit 14 DMA4IF: DMA Channel 4 Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 13 PMPIF: Parallel Master Port Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 12 Unimplemented: Read as ‘0’
bit 11 OC7IF: Output Compare Channel 7 Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 10 OC6IF: Output Compare Channel 6 Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 9 OC5IF: Output Compare Channel 5 Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 8 IC6IF: Input Capture Channel 6 Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 7 IC5IF: Input Capture Channel 5 Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 6 IC4IF: Input Capture Channel 4 Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 5 IC3IF: Input Capture Channel 3 Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 4 DMA3IF: DMA Channel 3 Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 3-2 Unimplemented: Read as ‘0’
PIC24FJ128GA310 FAMILY
DS39996F-page 108 2010-2011 Microchip Technology Inc.
bit 1 SPI2IF: SPI2 Event Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 0 SPF2IF: SPI2 Fault Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
REGISTER 8-7: IFS2: INTERRUPT FLAG STATUS REGISTER 2 (CONTINUED)
REGISTER 8-8: IFS3: INTERRUPT FLAG STATUS REGISTER 3
U-0 R/W-0 R/W-0 U-0 U-0 U-0 U-0 U-0
— RTCIF DMA5IF —————
bit 15 bit 8
U-0 R/W-0 R/W-0 U-0 U-0 R/W-0 R/W-0 U-0
— INT4IF INT3IF ——MI2C2IFSI2C2IF—
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 Unimplemented: Read as ‘0’
bit 14 RTCIF: Real-Time Clock/Calendar Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 13 DMA5IF: DMA Channel 5 Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 12-7 Unimplemented: Read as ‘0’
bit 6 INT4IF: External Interrupt 4 Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 5 INT3IF: External Interrupt 3 Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 4-3 Unimplemented: Read as ‘0’
bit 2 MI2C2IF: Master I2C2 Event Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 1 SI2C2IF: Slave I2C2 Event Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 0 Unimplemented: Read as ‘0’
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REGISTER 8-9: IFS4: INTERRUPT FLAG STATUS REGISTER 4
U-0 U-0 R/W-0 U-0 U-0 U-0 U-0 R/W-0
——CTMUIF————LVDIF
bit 15 bit 8
U-0 U-0 U-0 U-0 R/W-0 R/W-0 R/W-0 U-0
———— CRCIF U2ERIF U1ERIF —
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-14 Unimplemented: Read as ‘0’
bit 13 CTMUIF: CTMU Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 12-9 Unimplemented: Read as ‘0’
bit 8 LVDIF: Low-Voltage Detect Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 7-4 Unimplemented: Read as ‘0’
bit 3 CRCIF: CRC Generator Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 2 U2ERIF: UART2 Error Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 1 U1ERIF: UART1 Error Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 0 Unimplemented: Read as ‘0’
PIC24FJ128GA310 FAMILY
DS39996F-page 110 2010-2011 Microchip Technology Inc.
REGISTER 8-10: IFS5: INTERRUPT FLAG STATUS REGISTER 5
U-0 U-0 U-0 U-0 U-0 U-0 R/W-0 R/W-0
— — — — — — U4TXIF U4RXIF
bit 15 bit 8
R/W-0 U-0 U-0 U-0 R/W-0 R/W-0 R/W-0 U-0
U4ERIF — — — U3TXIF U3RXIF U3ERIF —
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-10 Unimplemented: Read as ‘0’
bit 9 U4TXIF: UART4 Transmitter Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 8 U4RXIF: UART4 Receiver Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 7 U4ERIF: UART4 Error Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 6-4 Unimplemented: Read as ‘0’
bit 3 U3TXIF: UART3 Transmitter Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 2 U3RXIF: UART3 Receiver Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 1 U3ERIF: UART3 Error Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 0 Unimplemented: Read as ‘0’
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REGISTER 8-11: IFS6: INTERRUPT FLAG STATUS REGISTER 6
U-0 U-0 U-0 U-0 U-0 U-0 U-0 U-0
— — — — — — — —
bit 15 bit 8
U-0 U-0 U-0 R/W-0 U-0 U-0 U-0 U-0
— — — LCDIF — — — —
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-5 Unimplemented: Read as ‘0’
bit 4 LCDIF: LCD Controller Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 3-0 Unimplemented: Read as ‘0’
REGISTER 8-12: IFS7: INTERRUPT FLAG STATUS REGISTER 7
U-0 U-0 U-0 U-0 U-0 U-0 U-0 U-0
— — — — — — — —
bit 15 bit 8
U-0 U-0 R/W-0 U-0 U-0 U-0 U-0 U-0
——JTAGIF—————
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-6 Unimplemented: Read as ‘0’
bit 5 JTAGIF: JTAG Controller Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 4-0 Unimplemented: Read as ‘0’
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REGISTER 8-13: IEC0: INTERRUPT ENABLE CONTROL REGISTER 0
U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
— DMA1IE AD1IE U1TXIE U1RXIE SPI1IE SPF1IE T3IE
bit 15 bit 8
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
T2IE OC2IE IC2IE DMA0IE T1IE OC1IE IC1IE INT0IE
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 Unimplemented: Read as ‘0’
bit 14 DMA1IE: DMA Channel 1 Interrupt Flag Enable bit
1 = Interrupt request is enabled
0 = Interrupt request is not enabled
bit 13 AD1IE: A/D Conversion Complete Interrupt Enable bit
1 = Interrupt request is enabled
0 = Interrupt request is not enabled
bit 12 U1TXIE: UART1 Transmitter Interrupt Enable bit
1 = Interrupt request is enabled
0 = Interrupt request is not enabled
bit 11 U1RXIE: UART1 Receiver Interrupt Enable bit
1 = Interrupt request is enabled
0 = Interrupt request is not enabled
bit 10 SPI1IE: SPI1 Transfer Complete Interrupt Enable bit
1 = Interrupt request is enabled
0 = Interrupt request is not enabled
bit 9 SPF1IE: SPI1 Fault Interrupt Enable bit
1 = Interrupt request is enabled
0 = Interrupt request is not enabled
bit 8 T3IE: Timer3 Interrupt Enable bit
1 = Interrupt request is enabled
0 = Interrupt request is not enabled
bit 7 T2IE: Timer2 Interrupt Enable bit
1 = Interrupt request is enabled
0 = Interrupt request is not enabled
bit 6 OC2IE: Output Compare Channel 2 Interrupt Enable bit
1 = Interrupt request is enabled
0 = Interrupt request is not enabled
bit 5 IC2IE: Input Capture Channel 2 Interrupt Enable bit
1 = Interrupt request is enabled
0 = Interrupt request is not enabled
bit 4 DMA0IE: DMA Channel 0 Interrupt Flag Enable bit
1 = Interrupt request is enabled
0 = Interrupt request is not enabled
bit 3 T1IE: Timer1 Interrupt Enable bit
1 = Interrupt request is enabled
0 = Interrupt request is not enabled
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bit 2 OC1IE: Output Compare Channel 1 Interrupt Enable bit
1 = Interrupt request is enabled
0 = Interrupt request is not enabled
bit 1 IC1IE: Input Capture Channel 1 Interrupt Enable bit
1 = Interrupt request is enabled
0 = Interrupt request is not enabled
bit 0 INT0IE: External Interrupt 0 Enable bit
1 = Interrupt request is enabled
0 = Interrupt request is not enabled
REGISTER 8-13: IEC0: INTERRUPT ENABLE CONTROL REGISTER 0 (CONTINUED)
PIC24FJ128GA310 FAMILY
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REGISTER 8-14: IEC1: INTERRUPT ENABLE CONTROL REGISTER 1
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
U2TXIE U2RXIE INT2IE(1)T5IE T4IE OC4IE OC3IE DMA2IE
bit 15 bit 8
U-0 R/W-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
—IC7IE—INT1IE
(1)CNIE CMIE MI2C1IE SI2C1IE
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 U2TXIE: UART2 Transmitter Interrupt Enable bit
1 = Interrupt request is enabled
0 = Interrupt request is not enabled
bit 14 U2RXIE: UART2 Receiver Interrupt Enable bit
1 = Interrupt request is enabled
0 = Interrupt request is not enabled
bit 13 INT2IE: External Interrupt 2 Enable bit(1)
1 = Interrupt request is enabled
0 = Interrupt request is not enabled
bit 12 T5IE: Timer5 Interrupt Enable bit
1 = Interrupt request is enabled
0 = Interrupt request is not enabled
bit 11 T4IE: Timer4 Interrupt Enable bit
1 = Interrupt request is enabled
0 = Interrupt request is not enabled
bit 10 OC4IE: Output Compare Channel 4 Interrupt Enable bit
1 = Interrupt request is enabled
0 = Interrupt request is not enabled
bit 9 OC3IE: Output Compare Channel 3 Interrupt Enable bit
1 = Interrupt request is enabled
0 = Interrupt request is not enabled
bit 8 DMA2IE: DMA Channel 2 Interrupt Flag Enable bit
1 = Interrupt request is enabled
0 = Interrupt request is not enabled
bit 7 Unimplemented: Read as ‘0’
bit 6 IC7IE: Input Capture Channel 7 Interrupt Enable bit
1 = Interrupt request is enabled
0 = Interrupt request is not enabled
bit 5 Unimplemented: Read as ‘0’
bit 4 INT1IE: External Interrupt 1 Enable bit(1)
1 = Interrupt request is enabled
0 = Interrupt request is not enabled
Note 1: If an external interrupt is enabled, the interrupt input must also be configured to an available RPx or RPIx
pin. See Section 11.4 “Peripheral Pin Select (PPS)” for more information.
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bit 3 CNIE: Input Change Notification Interrupt Enable bit
1 = Interrupt request is enabled
0 = Interrupt request is not enabled
bit 2 CMIE: Comparator Interrupt Enable bit
1 = Interrupt request is enabled
0 = Interrupt request is not enabled
bit 1 MI2C1IE: Master I2C1 Event Interrupt Enable bit
1 = Interrupt request is enabled
0 = Interrupt request is not enabled
bit 0 SI2C1IE: Slave I2C1 Event Interrupt Enable bit
1 = Interrupt request is enabled
0 = Interrupt request is not enabled
REGISTER 8-14: IEC1: INTERRUPT ENABLE CONTROL REGISTER 1 (CONTINUED)
Note 1: If an external interrupt is enabled, the interrupt input must also be configured to an available RPx or RPIx
pin. See Section 11.4 “Peripheral Pin Select (PPS)” for more information.
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DS39996F-page 116 2010-2011 Microchip Technology Inc.
REGISTER 8-15: IEC2: INTERRUPT ENABLE CONTROL REGISTER 2
U-0 R/W-0 R/W-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0
—DMA4IEPMPIE — OC7IE OC6IE OC5IE IC6IE
bit 15 bit 8
R/W-0 R/W-0 R/W-0 R/W-0 U-0 U-0 R/W-0 R/W-0
IC5IE IC4IE IC3IE DMA3IE —— SPI2IE SPF2IE
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 Unimplemented: Read as ‘0’
bit 14 DMA4IE: DMA Channel 4 Interrupt Flag Enable bit
1 = Interrupt request is enabled
0 = Interrupt request is not enabled
bit 13 PMPIE: Parallel Master Port Interrupt Enable bit
1 = Interrupt request is enabled
0 = Interrupt request is not enabled
bit 12 Unimplemented: Read as ‘0’
bit 11 OC7IE: Output Compare Channel 7 Interrupt Enable bit
1 = Interrupt request is enabled
0 = Interrupt request is not enabled
bit 10 OC6IE: Output Compare Channel 6 Interrupt Enable bit
1 = Interrupt request is enabled
0 = Interrupt request is not enabled
bit 9 OC5IE: Output Compare Channel 5 Interrupt Enable bit
1 = Interrupt request is enabled
0 = Interrupt request is not enabled
bit 8 IC6IE: Input Capture Channel 6 Interrupt Enable bit
1 = Interrupt request is enabled
0 = Interrupt request is not enabled
bit 7 IC5IE: Input Capture Channel 5 Interrupt Enable bit
1 = Interrupt request is enabled
0 = Interrupt request is not enabled
bit 6 IC4IE: Input Capture Channel 4 Interrupt Enable bit
1 = Interrupt request is enabled
0 = Interrupt request is not enabled
bit 5 IC3IE: Input Capture Channel 3 Interrupt Enable bit
1 = Interrupt request is enabled
0 = Interrupt request is not enabled
bit 4 DMA3IF: DMA Channel 3 Interrupt Flag Enable bit
1 = Interrupt request is enabled
0 = Interrupt request is not enabled
bit 3-2 Unimplemented: Read as ‘0’
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bit 1 SPI2IE: SPI2 Event Interrupt Enable bit
1 = Interrupt request is enabled
0 = Interrupt request is not enabled
bit 0 SPF2IE: SPI2 Fault Interrupt Enable bit
1 = Interrupt request is enabled
0 = Interrupt request is not enabled
REGISTER 8-15: IEC2: INTERRUPT ENABLE CONTROL REGISTER 2
REGISTER 8-16: IEC3: INTERRUPT ENABLE CONTROL REGISTER 3
U-0 R/W-0 R/W-0 U-0 U-0 U-0 U-0 U-0
— RTCIE DMA5IE —————
bit 15 bit 8
U-0 R/W-0 R/W-0 U-0 U-0 R/W-0 R/W-0 U-0
—INT4IE
(1)INT3IE(1)——MI2C2IESI2C2IE—
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 Unimplemented: Read as ‘0’
bit 14 RTCIE: Real-Time Clock/Calendar Interrupt Enable bit
1 = Interrupt request is enabled
0 = Interrupt request is not enabled
bit 13 DMA5IE: DMA Channel 5 Interrupt Flag Enable bit
1 = Interrupt request is enabled
0 = Interrupt request is not enabled
bit 12-7 Unimplemented: Read as ‘0’
bit 6 INT4IE: External Interrupt 4 Enable bit(1)
1 = Interrupt request is enabled
0 = Interrupt request is not enabled
bit 5 INT3IE: External Interrupt 3 Enable bit(1)
1 = Interrupt request is enabled
0 = Interrupt request is not enabled
bit 4-3 Unimplemented: Read as ‘0’
bit 2 MI2C2IE: Master I2C2 Event Interrupt Enable bit
1 = Interrupt request is enabled
0 = Interrupt request is not enabled
bit 1 SI2C2IE: Slave I2C2 Event Interrupt Enable bit
1 = Interrupt request is enabled
0 = Interrupt request is not enabled
bit 0 Unimplemented: Read as ‘0’
Note 1: If an external interrupt is enabled, the interrupt input must also be configured to an available RPx or RPIx
pin. See Section 11.4 “Peripheral Pin Select (PPS)” for more information.
PIC24FJ128GA310 FAMILY
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REGISTER 8-17: IEC4: INTERRUPT ENABLE CONTROL REGISTER 4
U-0 U-0 R/W-0 U-0 U-0 U-0 U-0 R/W-0
——CTMUIE————LVDIE
bit 15 bit 8
U-0 U-0 U-0 U-0 R/W-0 R/W-0 R/W-0 U-0
———— CRCIE U2ERIE U1ERIE —
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-14 Unimplemented: Read as ‘0’
bit 13 CTMUIE: CTMU Interrupt Enable bit
1 = Interrupt request is enabled
0 = Interrupt request is not enabled
bit 12-9 Unimplemented: Read as ‘0’
bit 8 LVDIE: Low-Voltage Detect Interrupt Enable bit
1 = Interrupt request is enabled
0 = Interrupt request is not enabled
bit 7-4 Unimplemented: Read as ‘0’
bit 3 CRCIE: CRC Generator Interrupt Enable bit
1 = Interrupt request is enabled
0 = Interrupt request is not enabled
bit 2 U2ERIE: UART2 Error Interrupt Enable bit
1 = Interrupt request is enabled
0 = Interrupt request is not enabled
bit 1 U1ERIE: UART1 Error Interrupt Enable bit
1 = Interrupt request is enabled
0 = Interrupt request is not enabled
bit 0 Unimplemented: Read as ‘0’
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REGISTER 8-18: IEC5: INTERRUPT ENABLE CONTROL REGISTER 5
U-0 U-0 U-0 U-0 U-0 U-0 R/W-0 R/W-0
— — — — — — U4TXIE U4RXIE
bit 15 bit 8
R/W-0 U-0 U-0 U-0 R/W-0 R/W-0 R/W-0 U-0
U4ERIE — — — U3TXIE U3RXIE U3ERIE —
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-10 Unimplemented: Read as ‘0’
bit 9 U4TXIE: UART4 Transmitter Interrupt Enable bit
1 = Interrupt request is enabled
0 = Interrupt request is not enabled
bit 8 U4RXIE: UART4 Receiver Interrupt Enable bit
1 = Interrupt request is enabled
0 = Interrupt request is not enabled
bit 7 U4ERIE: UART4 Error Interrupt Enable bit
1 = Interrupt request is enabled
0 = Interrupt request is not enabled
bit 6-4 Unimplemented: Read as ‘0’
bit 3 U3TXIE: UART3 Transmitter Interrupt Enable bit
1 = Interrupt request is enabled
0 = Interrupt request is not enabled
bit 2 U3RXIE: UART3 Receiver Interrupt Enable bit
1 = Interrupt request is enabled
0 = Interrupt request is not enabled
bit 1 U3ERIE: UART3 Error Interrupt Enable bit
1 = Interrupt request is enabled
0 = Interrupt request is not enabled
bit 0 Unimplemented: Read as ‘0’
PIC24FJ128GA310 FAMILY
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REGISTER 8-19: IEC6: INTERRUPT ENABLE CONTROL REGISTER 6
U-0 U-0 U-0 U-0 U-0 U-0 U-0 U-0
— — — — — — — —
bit 15 bit 8
U-0 U-0 U-0 R/W-0 U-0 U-0 U-0 U-0
— — —LCDIE— — — —
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-5 Unimplemented: Read as ‘0’
bit 4 LCDIE: LCD Controller Interrupt Enable bit
1 = Interrupt request is enabled
0 = Interrupt request is not enabled
bit 3-0 Unimplemented: Read as ‘0’
REGISTER 8-20: IEC7: INTERRUPT ENABLE CONTROL REGISTER 7
U-0 U-0 U-0 U-0 U-0 U-0 U-0 U-0
— — — — — — — —
bit 15 bit 8
U-0 U-0 R/W-0 U-0 U-0 U-0 U-0 U-0
——JTAGIE—————
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-6 Unimplemented: Read as ‘0’
bit 5 JTAGIE: JATG Interrupt Enable bit
1 = Interrupt request is enabled
0 = Interrupt request is not enabled
bit 4-0 Unimplemented: Read as ‘0’
2010-2011 Microchip Technology Inc. DS39996F-page 121
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REGISTER 8-21: IPC0: INTERRUPT PRIORITY CONTROL REGISTER 0
U-0 R/W-1 R/W-0 R/W-0 U-0 R/W-1 R/W-0 R/W-0
— T1IP2 T1IP1 T1IP0 — OC1IP2 OC1IP1 OC1IP0
bit 15 bit 8
U-0 R/W-1 R/W-0 R/W-0 U-0 R/W-1 R/W-0 R/W-0
— IC1IP2 IC1IP1 IC1IP0 — INT0IP2 INT0IP1 INT0IP0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 Unimplemented: Read as ‘0’
bit 14-12 T1IP<2:0>: Timer1 Interrupt Priority bits
111 = Interrupt is Priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is Priority 1
000 = Interrupt source is disabled
bit 11 Unimplemented: Read as ‘0’
bit 10-8 OC1IP<2:0>: Output Compare Channel 1 Interrupt Priority bits
111 = Interrupt is Priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is Priority 1
000 = Interrupt source is disabled
bit 7 Unimplemented: Read as ‘0’
bit 6-4 IC1IP<2:0>: Input Capture Channel 1 Interrupt Priority bits
111 = Interrupt is Priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is Priority 1
000 = Interrupt source is disabled
bit 3 Unimplemented: Read as ‘0’
bit 2-0 INT0IP<2:0>: External Interrupt 0 Priority bits
111 = Interrupt is Priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is Priority 1
000 = Interrupt source is disabled
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DS39996F-page 122 2010-2011 Microchip Technology Inc.
REGISTER 8-22: IPC1: INTERRUPT PRIORITY CONTROL REGISTER 1
U-0 R/W-1 R/W-0 R/W-0 U-0 R/W-1 R/W-0 R/W-0
— T2IP2 T2IP1 T2IP0 — OC2IP2 OC2IP1 OC2IP0
bit 15 bit 8
U-0 R/W-1 R/W-0 R/W-0 U-0 R/W-1 R/W-0 R/W-0
— IC2IP2 IC2IP1 IC2IP0 — DMA0IP2 DMA0IP1 DMA0IP0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 Unimplemented: Read as ‘0’
bit 14-12 T2IP<2:0>: Timer2 Interrupt Priority bits
111 = Interrupt is Priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is Priority 1
000 = Interrupt source is disabled
bit 11 Unimplemented: Read as ‘0’
bit 10-8 OC2IP<2:0>: Output Compare Channel 2 Interrupt Priority bits
111 = Interrupt is Priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is Priority 1
000 = Interrupt source is disabled
bit 7 Unimplemented: Read as ‘0’
bit 6-4 IC2IP<2:0>: Input Capture Channel 2 Interrupt Priority bits
111 = Interrupt is Priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is Priority 1
000 = Interrupt source is disabled
bit 3 Unimplemented: Read as ‘0’
bit 2-0 DMA0IP<2:0>: DMA Channel 0 Interrupt Priority bits
111 = Interrupt is Priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is Priority 1
000 = Interrupt source is disabled
2010-2011 Microchip Technology Inc. DS39996F-page 123
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REGISTER 8-23: IPC2: INTERRUPT PRIORITY CONTROL REGISTER 2
U-0 R/W-1 R/W-0 R/W-0 U-0 R/W-1 R/W-0 R/W-0
— U1RXIP2 U1RXIP1 U1RXIP0 — SPI1IP2 SPI1IP1 SPI1IP0
bit 15 bit 8
U-0 R/W-1 R/W-0 R/W-0 U-0 R/W-1 R/W-0 R/W-0
— SPF1IP2 SPF1IP1 SPF1IP0 — T3IP2 T3IP1 T3IP0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 Unimplemented: Read as ‘0’
bit 14-12 U1RXIP<2:0>: UART1 Receiver Interrupt Priority bits
111 = Interrupt is Priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is Priority 1
000 = Interrupt source is disabled
bit 11 Unimplemented: Read as ‘0’
bit 10-8 SPI1IP<2:0>: SPI1 Event Interrupt Priority bits
111 = Interrupt is Priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is Priority 1
000 = Interrupt source is disabled
bit 7 Unimplemented: Read as ‘0’
bit 6-4 SPF1IP<2:0>: SPI1 Fault Interrupt Priority bits
111 = Interrupt is Priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is Priority 1
000 = Interrupt source is disabled
bit 3 Unimplemented: Read as ‘0’
bit 2-0 T3IP<2:0>: Timer3 Interrupt Priority bits
111 = Interrupt is Priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is Priority 1
000 = Interrupt source is disabled
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DS39996F-page 124 2010-2011 Microchip Technology Inc.
REGISTER 8-24: IPC3: INTERRUPT PRIORITY CONTROL REGISTER 3
U-0 U-0 U-0 U-0 U-0 R/W-1 R/W-0 R/W-0
— — — — — DMA1IP2 DMA1IP1 DMA1IP0
bit 15 bit 8
U-0 R/W-1 R/W-0 R/W-0 U-0 R/W-1 R/W-0 R/W-0
— AD1IP2 AD1IP1 AD1IP0 — U1TXIP2 U1TXIP1 U1TXIP0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-11 Unimplemented: Read as ‘0’
bit 10-8 DMA1IP<2:0>: DMA Channel 1 Interrupt Priority bits
111 = Interrupt is Priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is Priority 1
000 = Interrupt source is disabled
bit 7 Unimplemented: Read as ‘0’
bit 6-4 AD1IP<2:0>: A/D Conversion Complete Interrupt Priority bits
111 = Interrupt is Priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is Priority 1
000 = Interrupt source is disabled
bit 3 Unimplemented: Read as ‘0’
bit 2-0 U1TXIP<2:0>: UART1 Transmitter Interrupt Priority bits
111 = Interrupt is Priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is Priority 1
000 = Interrupt source is disabled
2010-2011 Microchip Technology Inc. DS39996F-page 125
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REGISTER 8-25: IPC4: INTERRUPT PRIORITY CONTROL REGISTER 4
U-0 R/W-1 R/W-0 R/W-0 U-0 R/W-1 R/W-0 R/W-0
— CNIP2 CNIP1 CNIP0 —CMIP2CMIP1CMIP0
bit 15 bit 8
U-0 R/W-1 R/W-0 R/W-0 U-0 R/W-1 R/W-0 R/W-0
— MI2C1IP2 MI2C1IP1 MI2C1IP0 — SI2C1IP2 SI2C1IP1 SI2C1IP0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 Unimplemented: Read as ‘0’
bit 14-12 CNIP<2:0>: Input Change Notification Interrupt Priority bits
111 = Interrupt is Priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is Priority 1
000 = Interrupt source is disabled
bit 11 Unimplemented: Read as ‘0’
bit 10-8 CMIP<2:0>: Comparator Interrupt Priority bits
111 = Interrupt is Priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is Priority 1
000 = Interrupt source is disabled
bit 7 Unimplemented: Read as ‘0’
bit 6-4 MI2C1IP<2:0>: Master I2C1 Event Interrupt Priority bits
111 = Interrupt is Priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is Priority 1
000 = Interrupt source is disabled
bit 3 Unimplemented: Read as ‘0’
bit 2-0 SI2C1IP<2:0>: Slave I2C1 Event Interrupt Priority bits
111 = Interrupt is Priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is Priority 1
000 = Interrupt source is disabled
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DS39996F-page 126 2010-2011 Microchip Technology Inc.
REGISTER 8-26: IPC5: INTERRUPT PRIORITY CONTROL REGISTER 5
U-0 U-0 U-0 U-0 U-0 R/W-1 R/W-0 R/W-0
— — — — — IC7IP2 IC7IP1 IC7IP0
bit 15 bit 8
U-0 U-0 U-0 U-0 U-0 R/W-1 R/W-0 R/W-0
— — — — — INT1IP2 INT1IP1 INT1IP0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-11 Unimplemented: Read as ‘0’
bit 10-8 IC7IP<2:0>: Input Capture Channel 7 Interrupt Priority bits
111 = Interrupt is Priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is Priority 1
000 = Interrupt source is disabled
bit 7-3 Unimplemented: Read as ‘0’
bit 2-0 INT1IP<2:0>: External Interrupt 1 Priority bits
111 = Interrupt is Priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is Priority 1
000 = Interrupt source is disabled
2010-2011 Microchip Technology Inc. DS39996F-page 127
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REGISTER 8-27: IPC6: INTERRUPT PRIORITY CONTROL REGISTER 6
U-0 R/W-1 R/W-0 R/W-0 U-0 R/W-1 R/W-0 R/W-0
— T4IP2 T4IP1 T4IP0 — OC4IP2 OC4IP1 OC4IP0
bit 15 bit 8
U-0 R/W-1 R/W-0 R/W-0 U-0 R/W-1 R/W-0 R/W-0
— OC3IP2 OC3IP1 OC3IP0 — DMA2IP2 DMA2IP1 DMA2IP0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 Unimplemented: Read as ‘0’
bit 14-12 T4IP<2:0>: Timer4 Interrupt Priority bits
111 = Interrupt is Priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is Priority 1
000 = Interrupt source is disabled
bit 11 Unimplemented: Read as ‘0’
bit 10-8 OC4IP<2:0>: Output Compare Channel 4 Interrupt Priority bits
111 = Interrupt is Priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is Priority 1
000 = Interrupt source is disabled
bit 7 Unimplemented: Read as ‘0’
bit 6-4 OC3IP<2:0>: Output Compare Channel 3 Interrupt Priority bits
111 = Interrupt is Priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is Priority 1
000 = Interrupt source is disabled
bit 3 Unimplemented: Read as ‘0’
bit 2-0 DMA2IP<2:0>: DMA Channel 2 Interrupt Priority bits
111 = Interrupt is Priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is Priority 1
000 = Interrupt source is disabled
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DS39996F-page 128 2010-2011 Microchip Technology Inc.
REGISTER 8-28: IPC7: INTERRUPT PRIORITY CONTROL REGISTER 7
U-0 R/W-1 R/W-0 R/W-0 U-0 R/W-1 R/W-0 R/W-0
— U2TXIP2 U2TXIP1 U2TXIP0 — U2RXIP2 U2RXIP1 U2RXIP0
bit 15 bit 8
U-0 R/W-1 R/W-0 R/W-0 U-0 R/W-1 R/W-0 R/W-0
— INT2IP2 INT2IP1 INT2IP0 — T5IP2 T5IP1 T5IP0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 Unimplemented: Read as ‘0’
bit 14-12 U2TXIP<2:0>: UART2 Transmitter Interrupt Priority bits
111 = Interrupt is Priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is Priority 1
000 = Interrupt source is disabled
bit 11 Unimplemented: Read as ‘0’
bit 10-8 U2RXIP<2:0>: UART2 Receiver Interrupt Priority bits
111 = Interrupt is Priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is Priority 1
000 = Interrupt source is disabled
bit 7 Unimplemented: Read as ‘0’
bit 6-4 INT2IP<2:0>: External Interrupt 2 Priority bits
111 = Interrupt is Priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is Priority 1
000 = Interrupt source is disabled
bit 3 Unimplemented: Read as ‘0’
bit 2-0 T5IP<2:0>: Timer5 Interrupt Priority bits
111 = Interrupt is Priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is Priority 1
000 = Interrupt source is disabled
2010-2011 Microchip Technology Inc. DS39996F-page 129
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REGISTER 8-29: IPC8: INTERRUPT PRIORITY CONTROL REGISTER 8
U-0 U-0 U-0 U-0 U-0 U-0 U-0 U-0
— — — — — — — —
bit 15 bit 8
U-0 R/W-1 R/W-0 R/W-0 U-0 R/W-1 R/W-0 R/W-0
— SPI2IP2 SPI2IP1 SPI2IP0 — SPF2IP2 SPF2IP1 SPF2IP0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-7 Unimplemented: Read as ‘0’
bit 6-4 SPI2IP<2:0>: SPI2 Event Interrupt Priority bits
111 = Interrupt is Priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is Priority 1
000 = Interrupt source is disabled
bit 3 Unimplemented: Read as ‘0’
bit 2-0 SPF2IP<2:0>: SPI2 Fault Interrupt Priority bits
111 = Interrupt is Priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is Priority 1
000 = Interrupt source is disabled
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DS39996F-page 130 2010-2011 Microchip Technology Inc.
REGISTER 8-30: IPC9: INTERRUPT PRIORITY CONTROL REGISTER 9
U-0 R/W-1 R/W-0 R/W-0 U-0 R/W-1 R/W-0 R/W-0
— IC5IP2 IC5IP1 IC5IP0 — IC4IP2 IC4IP1 IC4IP0
bit 15 bit 8
U-0 R/W-1 R/W-0 R/W-0 U-0 R/W-1 R/W-0 R/W-0
— IC3IP2 IC3IP1 IC3IP0 — DMA3IP2 DMA3IP1 DMA3IP0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 Unimplemented: Read as ‘0’
bit 14-12 IC5IP<2:0>: Input Capture Channel 5 Interrupt Priority bits
111 = Interrupt is Priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is Priority 1
000 = Interrupt source is disabled
bit 11 Unimplemented: Read as ‘0’
bit 10-8 IC4IP<2:0>: Input Capture Channel 4 Interrupt Priority bits
111 = Interrupt is Priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is Priority 1
000 = Interrupt source is disabled
bit 7 Unimplemented: Read as ‘0’
bit 6-4 IC3IP<2:0>: Input Capture Channel 3 Interrupt Priority bits
111 = Interrupt is Priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is Priority 1
000 = Interrupt source is disabled
bit 3 Unimplemented: Read as ‘0’
bit 2-0 DMA3IP<2:0>: DMA Channel 3 Interrupt Priority bits
111 = Interrupt is Priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is Priority 1
000 = Interrupt source is disabled
2010-2011 Microchip Technology Inc. DS39996F-page 131
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REGISTER 8-31: IPC10: INTERRUPT PRIORITY CONTROL REGISTER 10
U-0 R/W-1 R/W-0 R/W-0 U-0 R/W-1 R/W-0 R/W-0
— OC7IP2 OC7IP1 OC7IP0 — OC6IP2 OC6IP1 OC6IP0
bit 15 bit 8
U-0 R/W-1 R/W-0 R/W-0 U-0 R/W-1 R/W-0 R/W-0
— OC5IP2 OC5IP1 OC5IP0 — IC6IP2 IC6IP1 IC6IP0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 Unimplemented: Read as ‘0’
bit 14-12 OC7IP<2:0>: Output Compare Channel 7 Interrupt Priority bits
111 = Interrupt is Priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is Priority 1
000 = Interrupt source is disabled
bit 11 Unimplemented: Read as ‘0’
bit 10-8 OC6IP<2:0>: Output Compare Channel 6 Interrupt Priority bits
111 = Interrupt is Priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is Priority 1
000 = Interrupt source is disabled
bit 7 Unimplemented: Read as ‘0’
bit 6-4 OC5IP<2:0>: Output Compare Channel 5 Interrupt Priority bits
111 = Interrupt is Priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is Priority 1
000 = Interrupt source is disabled
bit 3 Unimplemented: Read as ‘0’
bit 2-0 IC6IP<2:0>: Input Capture Channel 6 Interrupt Priority bits
111 = Interrupt is Priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is Priority 1
000 = Interrupt source is disabled
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DS39996F-page 132 2010-2011 Microchip Technology Inc.
REGISTER 8-32: IPC11: INTERRUPT PRIORITY CONTROL REGISTER 11
U-0 U-0 U-0 U-0 U-0 R/W-1 R/W-0 R/W-0
— — — — — DMA4IP2 DMA4IP1 DMA4IP0
bit 15 bit 8
U-0 R/W-1 R/W-0 R/W-0 U-0 U-0 U-0 U-0
— PMPIP2 PMPIP1 PMPIP0 — — — —
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-11 Unimplemented: Read as ‘0’
bit 10-8 DMA4IP<2:0>: DMA Channel 4 Interrupt Priority bits
111 = Interrupt is Priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is Priority 1
000 = Interrupt source is disabled
bit 7 Unimplemented: Read as ‘0’
bit 6-4 PMPIP<2:0>: Parallel Master Port Interrupt Priority bits
111 = Interrupt is Priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is Priority 1
000 = Interrupt source is disabled
bit 3-0 Unimplemented: Read as ‘0’
2010-2011 Microchip Technology Inc. DS39996F-page 133
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REGISTER 8-33: IPC12: INTERRUPT PRIORITY CONTROL REGISTER 12
U-0 U-0 U-0 U-0 U-0 R/W-1 R/W-0 R/W-0
— — — — — MI2C2IP2 MI2C2IP1 MI2C2IP0
bit 15 bit 8
U-0 R/W-1 R/W-0 R/W-0 U-0 U-0 U-0 U-0
— SI2C2IP2 SI2C2IP1 SI2C2IP0 — — — —
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-11 Unimplemented: Read as ‘0’
bit 10-8 MI2C2IP<2:0>: Master I2C2 Event Interrupt Priority bits
111 = Interrupt is Priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is Priority 1
000 = Interrupt source is disabled
bit 7 Unimplemented: Read as ‘0’
bit 6-4 SI2C2IP<2:0>: Slave I2C2 Event Interrupt Priority bits
111 = Interrupt is Priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is Priority 1
000 = Interrupt source is disabled
bit 3-0 Unimplemented: Read as ‘0’
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DS39996F-page 134 2010-2011 Microchip Technology Inc.
REGISTER 8-34: IPC13: INTERRUPT PRIORITY CONTROL REGISTER 13
U-0 U-0 U-0 U-0 U-0 R/W-1 R/W-0 R/W-0
— — — — — INT4IP2 INT4IP1 INT4IP0
bit 15 bit 8
U-0 R/W-1 R/W-0 R/W-0 U-0 U-0 U-0 U-0
— INT3IP2 INT3IP1 INT3IP0 — — — —
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-11 Unimplemented: Read as ‘0’
bit 10-8 INT4IP<2:0>: External Interrupt 4 Priority bits
111 = Interrupt is Priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is Priority 1
000 = Interrupt source is disabled
bit 7 Unimplemented: Read as ‘0’
bit 6-4 INT3IP<2:0>: External Interrupt 3 Priority bits
111 = Interrupt is Priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is Priority 1
000 = Interrupt source is disabled
bit 3-0 Unimplemented: Read as ‘0’
2010-2011 Microchip Technology Inc. DS39996F-page 135
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REGISTER 8-35: IPC15: INTERRUPT PRIORITY CONTROL REGISTER 15
U-0 U-0 U-0 U-0 U-0 R/W-1 R/W-0 R/W-0
— — — — — RTCIP2 RTCIP1 RTCIP0
bit 15 bit 8
U-0 R/W-1 R/W-0 R/W-0 U-0 U-0 U-0 U-0
— DMA5IP2 DMA5IP1 DMA5IP0 — — — —
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-11 Unimplemented: Read as ‘0’
bit 10-8 RTCIP<2:0>: Real-Time Clock and Calendar Interrupt Priority bits
111 = Interrupt is Priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is Priority 1
000 = Interrupt source is disabled
bit 7 Unimplemented: Read as ‘0’
bit 6-4 DMA5IP<2:0>: DMA Channel 5 Interrupt Priority bits
111 = Interrupt is Priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is Priority 1
000 = Interrupt source is disabled
bit 3-0 Unimplemented: Read as ‘0’
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DS39996F-page 136 2010-2011 Microchip Technology Inc.
REGISTER 8-36: IPC16: INTERRUPT PRIORITY CONTROL REGISTER 16
U-0 R/W-1 R/W-0 R/W-0 U-0 R/W-1 R/W-0 R/W-0
— CRCIP2 CRCIP1 CRCIP0 — U2ERIP2 U2ERIP1 U2ERIP0
bit 15 bit 8
U-0 R/W-1 R/W-0 R/W-0 U-0 U-0 U-0 U-0
— U1ERIP2 U1ERIP1 U1ERIP0 — — — —
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 Unimplemented: Read as ‘0’
bit 14-12 CRCIP<2:0>: CRC Generator Error Interrupt Priority bits
111 = Interrupt is Priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is Priority 1
000 = Interrupt source is disabled
bit 11 Unimplemented: Read as ‘0’
bit 10-8 U2ERIP<2:0>: UART2 Error Interrupt Priority bits
111 = Interrupt is Priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is Priority 1
000 = Interrupt source is disabled
bit 7 Unimplemented: Read as ‘0’
bit 6-4 U1ERIP<2:0>: UART1 Error Interrupt Priority bits
111 = Interrupt is Priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is Priority 1
000 = Interrupt source is disabled
bit 3-0 Unimplemented: Read as ‘0’
2010-2011 Microchip Technology Inc. DS39996F-page 137
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REGISTER 8-37: IPC18: INTERRUPT PRIORITY CONTROL REGISTER 18
U-0 U-0 U-0 U-0 U-0 U-0 U-0 U-0
— — — — — — — —
bit 15 bit 8
U-0 U-0 U-0 U-0 U-0 R/W-1 R/W-0 R/W-0
— — — — — LVDIP2 LVDIP1 LVDIP0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-3 Unimplemented: Read as ‘0’
bit 2-0 LVDIP<2:0>: Low-Voltage Detect Interrupt Priority bits
111 = Interrupt is Priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is Priority 1
000 = Interrupt source is disabled
REGISTER 8-38: IPC19: INTERRUPT PRIORITY CONTROL REGISTER 19
U-0 U-0 U-0 U-0 U-0 U-0 U-0 U-0
— — — — — — — —
bit 15 bit 8
U-0 R/W-1 R/W-0 R/W-0 U-0 U-0 U-0 U-0
— CTMUIP2 CTMUIP1 CTMUIP0 — — — —
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-7 Unimplemented: Read as ‘0’
bit 6-4 CTMUIP<2:0>: CTMU Interrupt Priority bits
111 = Interrupt is Priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is Priority 1
000 = Interrupt source is disabled
bit 3-0 Unimplemented: Read as ‘0’
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REGISTER 8-39: IPC20: INTERRUPT PRIORITY CONTROL REGISTER 20
U-0 R/W-1 R/W-0 R/W-0 U-0 R/W-1 R/W-0 R/W-0
— U3TXIP2 U3TXIP1 U3TXIP0 — U3RXIP2 U3RXIP1 U3RXIP0
bit 15 bit 8
U-0 R/W-1 R/W-0 R/W-0 U-0 U-0 U-0 U-0
— U3ERIP2 U3ERIP1 U3ERIP0 — — — —
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 Unimplemented: Read as ‘0’
bit 14-12 U3TXIP<2:0>: UART3 Transmitter Interrupt Priority bits
111 = Interrupt is Priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is Priority 1
000 = Interrupt source is disabled
bit 11 Unimplemented: Read as ‘0’
bit 10-8 U3RXIP<2:0>: UART3 Receiver Interrupt Priority bits
111 = Interrupt is Priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is Priority 1
000 = Interrupt source is disabled
bit 7 Unimplemented: Read as ‘0’
bit 6-4 U3ERIP<2:0>: UART3 Error Interrupt Priority bits
111 = Interrupt is Priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is Priority 1
000 = Interrupt source is disabled
bit 3-0 Unimplemented: Read as ‘0’
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REGISTER 8-40: IPC21: INTERRUPT PRIORITY CONTROL REGISTER 21
U-0 R/W-1 R/W-0 R/W-0 U-0 U-0 U-0 U-0
— U4ERIP2 U4ERIP1 U4ERIP0 — — — —
bit 15 bit 8
U-0 U-0 U-0 U-0 U-0 U-0 U-0 U-0
— — — — — — — —
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 Unimplemented: Read as ‘0’
bit 14-12 U4ERIP<2:0>: UART4 Error Interrupt Priority bits
111 = Interrupt is Priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is Priority 1
000 = Interrupt source is disabled
bit 11-0 Unimplemented: Read as ‘0’
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REGISTER 8-41: IPC22: INTERRUPT PRIORITY CONTROL REGISTER 22
U-0 U-0 U-0 U-0 U-0 U-0 U-0 U-0
— — — — — — — —
bit 15 bit 8
U-0 R/W-1 R/W-0 R/W-0 U-0 R/W-1 R/W-0 R/W-0
— U4TXIP2 U4TXIP1 U4TXIP0 — U4RXIP2 U4RXIP1 U4RXIP0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-7 Unimplemented: Read as ‘0’
bit 6-4 U4TXIP<2:0>: UART4 Transmitter Interrupt Priority bits
111 = Interrupt is Priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is Priority 1
000 = Interrupt source is disabled
bit 3 Unimplemented: Read as ‘0’
bit 2-0 U4RXIP<2:0>: UART4 Receiver Interrupt Priority bits
111 = Interrupt is Priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is Priority 1
000 = Interrupt source is disabled
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REGISTER 8-42: IPC25: INTERRUPT PRIORITY CONTROL REGISTER 25
U-0 U-0 U-0 U-0 U-0 U-0 U-0 U-0
— — — — — — — —
bit 15 bit 8
U-0 U-0 U-0 U-0 U-0 R/W-1 R/W-0 R/W-0
— — — — — LCDIP2 LCDIP1 LCDIP0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-3 Unimplemented: Read as ‘0’
bit 2-0 LCDIP<2:0>: LCD Controller Interrupt Priority bits
111 = Interrupt is Priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is Priority 1
000 = Interrupt source is disabled
REGISTER 8-43: IPC29: INTERRUPT PRIORITY CONTROL REGISTER 29
U-0 U-0 U-0 U-0 U-0 U-0 U-0 U-0
— — — — — — — —
bit 15 bit 8
U-0 R/W-1 R/W-0 R/W-0 U-0 U-0 U-0 U-0
— JTAGIP2 JTAGIP1 JTAGIP0 — — — —
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-7 Unimplemented: Read as ‘0’
bit 6-4 JTAGIP<2:0>: JTAG Interrupt Priority bits
111 = Interrupt is Priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is Priority 1
000 = Interrupt source is disabled
bit 3-0 Unimplemented: Read as ‘0’
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REGISTER 8-44: INTTREG: INTERRUPT CONTROLLER TEST REGISTER
R-0, HSC U-0 R/W-0 U-0 R-0, HSC R-0, HSC R-0, HSC R-0, HSC
CPUIRQ —VHOLD— ILR3ILR2ILR1ILR0
bit 15 bit 8
U-0 R-0, HSC R-0, HSC R-0, HSC R-0, HSC R-0, HSC R-0, HSC R-0, HSC
— VECNUM6 VECNUM5 VECNUM4 VECNUM3 VECNUM2 VECNUM1 VECNUM0
bit 7 bit 0
Legend: HSC = Hardware Settable/Clearable bit
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 CPUIRQ: Interrupt Request from Interrupt Controller CPU bit
1 = An interrupt request has occurred but has not yet been Acknowledged by the CPU. This happens
when the CPU priority is higher than the interrupt priority
0 = No interrupt request is unacknowledged
bit 14 Unimplemented: Read as ‘0’
bit 13 VHOLD: Vector Number Capture Configuration bit
1 = The VECNUM bits contain the value of the highest priority pending interrupt
0 = The VECNUM bits contain the value of the last Acknowledged interrupt (i.e., the last interrupt that
has occurred with higher priority than the CPU, even if other interrupts are pending)
bit 12 Unimplemented: Read as ‘0’
bit 11-8 ILR<3:0>: New CPU Interrupt Priority Level bits
1111 = CPU interrupt priority level is 15
•
•
•
0001 = CPU interrupt priority level is 1
0000 = CPU interrupt priority level is 0
bit 7 Unimplemented: Read as ‘0’
bit 6-0 VECNUM<5:0>: Vector Number of Pending Interrupt or Last Acknowledged Interrupt bits
VHOLD = 1: The VECNUM bits indicate the vector number (from 0 to 118) of the last interrupt to occur
VHOLD = 0: The VECNUM bits indicate the vector number (from 0 to 118) of the interrupt request
currently being handled
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8.4 Interrupt Setup Procedures
8.4.1 INITIALIZATION
To configure an interrupt source:
1. Set the NSTDIS (INTCON1<15>) control bit if
nested interrupts are not desired.
2. Select the user-assigned priority level for the
interrupt source by writing the control bits in the
appropriate IPCx register. The priority level will
depend on the specific application and type of
interrupt source. If multiple priority levels are not
desired, the IPCx register control bits for all
enabled interrupt sources may be programmed
to the same non-zero value.
3. Clear the interrupt flag status bit associated with
the peripheral in the associated IFSx register.
4. Enable the interrupt source by setting the
interrupt enable control bit associated with the
source in the appropriate IECx register.
8.4.2 INTERRUPT SERVICE ROUTINE
(ISR)
The method that is used to declare an Interrupt Service
Routine (ISR) and initialize the IVT with the correct vec-
tor address will depend on the programming language
(i.e., ‘C’ or assembler) and the language development
toolsuite that is used to develop the application. In
general, the user must clear the interrupt flag in the
appropriate IFSx register for the source of the interrupt
that the ISR handles; otherwise, the ISR will be
re-entered immediately after exiting the routine. If the
ISR is coded in assembly language, it must be termi-
nated using a RETFIE instruction to unstack the saved
PC value, SRL value and old CPU priority level.
8.4.3 TRAP SERVICE ROUTINE (TSR)
A Trap Service Routine (TSR) is coded like an ISR,
except that the appropriate trap status flag in the
INTCON1 register must be cleared to avoid re-entry
into the TSR.
8.4.4 INTERRUPT DISABLE
All user interrupts can be disabled using the following
procedure:
1. Push the current SR value onto the software
stack using the PUSH instruction.
2. Force the CPU to Priority Level 7 by inclusive
ORing the value 0Eh with SRL.
To enable user interrupts, the POP instruction may be
used to restore the previous SR value.
Note that only user interrupts with a priority level of 7 or
less can be disabled. Trap sources (Level 8-15) cannot
be disabled.
The DISI instruction provides a convenient way to
disable interrupts of Priority Levels 1-6 for a fixed
period of time. Level 7 interrupt sources are not
disabled by the DISI instruction.
Note: At a device Reset, the IPCx registers are
initialized, such that all user interrupt
sources are assigned to Priority Level 4.
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NOTES:
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9.0 OSCILLATOR
CONFIGURATION
The oscillator system for PIC24FJ128GA310 family
devices has the following features:
• A total of four external and internal oscillator options
as clock sources, providing 11 different clock modes
• On-chip 4x PLL to boost internal operating frequency
on select internal and external oscillator sources
• Software-controllable switching between various
clock sources
• Software-controllable postscaler for selective
clocking of CPU for system power savings
• A Fail-Safe Clock Monitor (FSCM) that detects
clock failure and permits safe application recovery
or shutdown
• A separate and independently configurable system
clock output for synchronizing external hardware
A simplified diagram of the oscillator system is shown
in Figure 9-1.
FIGURE 9-1: PIC24FJ1 28G A3 10 FAMILY CLOCK DIAGRAM
Note: This data sheet summarizes the features of
this group of PIC24F devices. It is not
intended to be a comprehensive reference
source. For more information, refer to the
“PIC24F Family Reference Manual”,
“Section 6. Oscillator” (DS39700).
Secondar y Osc illa to r
SOSCEN
Enable
Oscillator
SOSCO
SOSCI
Clock Source Option
for Other Modules
OSCI
OSCO
Primary Oscillator
XT, HS, EC
Postscaler
CLKDIV<10:8>
WDT, PWRT
8 MHz
FRCDIV
31 kHz (nominal)
FRC
Oscillator
LPRC
Oscillator
SOSC
LPRC
Clock Control Logic
Fail-Safe
Clock
Monitor
FRC
(nominal)
4 x PLL
8 MHz
4 MHz
CPU
Peripherals
Postscaler
CLKDIV<14:12>
CLKO
Reference Clock
Generator
REFO
REFOCON<15:8>
XTPLL, HSPLL,
ECPLL, FRCPLL
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9.1 CPU Clocking Scheme
The system clock source can be provided by one of
four sources:
• Primary Oscillator (POSC) on the OSCI and
OSCO pins
• Secondary Oscillator (SOSC) on the SOSCI and
SOSCO pins
• Fast Internal RC (FRC) Oscillator
• Low-Power Internal RC (LPRC) Oscillator
The primary oscillator and FRC sources have the
option of using the internal 4x PLL. The frequency of
the FRC clock source can optionally be reduced by the
programmable clock divider. The selected clock source
generates the processor and peripheral clock sources.
The processor clock source is divided by two to pro-
duce the internal instruction cycle clock, FCY. In this
document, the instruction cycle clock is also denoted
by FOSC/2. The internal instruction cycle clock, FOSC/2,
can be provided on the OSCO I/O pin for some
operating modes of the primary oscillator.
9.2 Initial Configuration on POR
The oscillator source (and operating mode) that is
used at a device Power-on Reset event is selected
using Configuration bit settings. The Oscillator
Configuration bit settings are located in the
Configuration registers in the program memory (refer
to Section 29.0 “Special Features” for further
details). The Primary Oscillator Configuration bits,
POSCMD<1:0> (Configuration Word 2<1:0>), and
the Initial Oscillator Select Configuration bits,
FNOSC<2:0> (Configuration Word 2<10:8>), select
the oscillator source that is used at a Power-on Reset.
The FRC Primary Oscillator (FRCDIV) with postscaler
is the default (unprogrammed) selection. The second-
ary oscillator, or one of the internal oscillators, may be
chosen by programming these bit locations.
The Configuration bits allow users to choose between
the various clock modes, shown in Tab l e 9 - 1.
9.2.1 CLOCK SWITCHING MODE
CONFIGURATION BITS
The FCKSM Configuration bits (Configuration
Word 2<7:6>) are used to jointly configure device clock
switching and the Fail-Safe Clock Monitor (FSCM).
Clock switching is enabled only when FCKSM1 is
programmed (‘0’). The FSCM is enabled only when the
FCKSM<1:0> bits are both programmed (‘00’).
TABLE 9-1: CONFIGURATION BIT VALUES FOR CLOCK SELECTION
Oscillator Mode Oscillator Source POSCMD<1:0> FNOSC<2:0> Note
Fast RC Oscillator with Postscaler
(FRCDIV)
Internal 11 111 1, 2
(Reserved) Internal xx 110 1
Low-Power RC Oscillator (LPRC) Internal 11 101 1
Secondary (Timer1) Oscillator
(SOSC)
Secondary 11 100 1
Primary Oscillator (XT) with PLL
Module (XTPLL)
Primary 01 011
Primary Oscillator (EC) with PLL
Module (ECPLL)
Primary 00 011
Primary Oscillator (HS) Primary 10 010
Primary Oscillator (XT) Primary 01 010
Primary Oscillator (EC) Primary 00 010
Fast RC Oscillator with PLL Module
(FRCPLL)
Internal 11 001 1
Fast RC Oscillator (FRC) Internal 11 000 1
Note 1: OSCO pin function is determined by the OSCIOFCN Configuration bit.
2: This is the default oscillator mode for an unprogrammed (erased) device.
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9.3 Control Registers
The operation of the oscillator is controlled by three
Special Function Registers:
• OSCCON
•CLKDIV
•OSCTUN
The OSCCON register (Register 9-1) is the main con-
trol register for the oscillator. It controls clock source
switching and allows the monitoring of clock sources.
The CLKDIV register (Register 9-2) controls the
features associated with Doze mode, as well as the
postscaler for the FRC oscillator.
The OSCTUN register (Register 9-3) allows the user to
fine tune the FRC oscillator over a range of approxi-
mately ±12%. Each bit increment or decrement
changes the factory calibrated frequency of the FRC
oscillator by a fixed amount.
REGISTER 9-1: OSCCON: OSCILLATOR CONTROL REGISTER
U-0 R-0 R-0 R-0 U-0 R/W-x(1)R/W-x(1)R/W-x(1)
— COSC2 COSC1 COSC0 — NOSC2 NOSC1 NOSC0
bit 15 bit 8
R/SO-0 R/W-0 R-0(3)U-0 R/CO-0 R/W-0 R/W-0 R/W-0
CLKLOCK IOLOCK(2)LOCK — CF POSCEN SOSCEN OSWEN
bit 7 bit 0
Legend: CO = Clearable Only bit SO = Settable Only bit
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 Unimplemented: Read as ‘0’
bit 14-12 COSC<2:0>: Current Oscillator Selection bits
111 = Fast RC Oscillator with Postscaler (FRCDIV)
110 = Reserved
101 = Low-Power RC Oscillator (LPRC)
100 = Secondary Oscillator (SOSC)
011 = Primary Oscillator with PLL module (XTPLL, HSPLL, ECPLL)
010 = Primary Oscillator (XT, HS, EC)
001 = Fast RC Oscillator with Postscaler and PLL module (FRCPLL)
000 = Fast RC Oscillator (FRC)
bit 11 Unimplemented: Read as ‘0’
bit 10-8 NOSC<2:0>: New Oscillator Selection bits(1)
111 = Fast RC Oscillator with Postscaler (FRCDIV)
110 = Reserved
101 = Low-Power RC Oscillator (LPRC)
100 = Secondary Oscillator (SOSC)
011 = Primary Oscillator with PLL module (XTPLL, HSPLL, ECPLL)
010 = Primary Oscillator (XT, HS, EC)
001 = Fast RC Oscillator with Postscaler and PLL module (FRCPLL)
000 = Fast RC Oscillator (FRC)
Note 1: Reset values for these bits are determined by the FNOSC Configuration bits.
2: The state of the IOLOCK bit can only be changed once an unlocking sequence has been executed. In
addition, if the IOL1WAY Configuration bit is ‘1’ once the IOLOCK bit is set, it cannot be cleared.
3: This bit also resets to ‘0’ during any valid clock switch or whenever a Non-PLL Clock mode is selected.
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bit 7 CLKLOCK: Clock Selection Lock Enabled bit
If FSCM is enabled (FCKSM1 = 1):
1 = Clock and PLL selections are locked
0 = Clock and PLL selections are not locked and may be modified by setting the OSWEN bit
If FSCM is disabled (FCKSM1 = 0):
Clock and PLL selections are never locked and may be modified by setting the OSWEN bit.
bit 6 IOLOCK: I/O Lock Enable bit(2)
1 = I/O lock is active
0 = I/O lock is not active
bit 5 LOCK: PLL Lock Status bit(3)
1 = PLL module is in lock or PLL module start-up timer is satisfied
0 = PLL module is out of lock, PLL start-up timer is running or PLL is disabled
bit 4 Unimplemented: Read as ‘0’
bit 3 CF: Clock Fail Detect bit
1 = FSCM has detected a clock failure
0 = No clock failure has been detected
bit 2 POSCEN: Primary Oscillator Sleep Enable bit
1 = Primary oscillator continues to operate during Sleep mode
0 = Primary oscillator is disabled during Sleep mode
bit 1 SOSCEN: 32 kHz Secondary Oscillator (SOSC) Enable bit
1 = Enable secondary oscillator
0 = Disable secondary oscillator
bit 0 OSWEN: Oscillator Switch Enable bit
1 = Initiate an oscillator switch to a clock source specified by the NOSC<2:0> bits
0 = Oscillator switch is complete
REGISTER 9-1: OSCCON: OSCILLATOR CONTROL REGISTER (CONTINUED)
Note 1: Reset values for these bits are determined by the FNOSC Configuration bits.
2: The state of the IOLOCK bit can only be changed once an unlocking sequence has been executed. In
addition, if the IOL1WAY Configuration bit is ‘1’ once the IOLOCK bit is set, it cannot be cleared.
3: This bit also resets to ‘0’ during any valid clock switch or whenever a Non-PLL Clock mode is selected.
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REGISTER 9-2: CLKDIV: CLOCK DIVIDER REGISTER
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-1
ROI DOZE2 DOZE1 DOZE0 DOZEN(1)RCDIV2 RCDIV1 RCDIV0
bit 15 bit 8
U-0 U-0 U-0 U-0 U-0 U-0 U-0 U-0
— — — — — — — —
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 ROI: Recover on Interrupt bit
1 = Interrupts clear the DOZEN bit and reset the CPU peripheral clock ratio to 1:1
0 = Interrupts have no effect on the DOZEN bit
bit 14-12 DOZE<2:0>: CPU Peripheral Clock Ratio Select bits
111 = 1:128
110 = 1:64
101 = 1:32
100 = 1:16
011 = 1:8
010 = 1:4
001 = 1:2
000 = 1:1
bit 11 DOZEN: DOZE Enable bit(1)
1 = DOZE<2:0> bits specify the CPU peripheral clock ratio
0 = CPU peripheral clock ratio set to 1:1
bit 10-8 RCDIV<2:0>: FRC Postscaler Select bits
111 = 31.25 kHz (divide by 256)
110 = 125 kHz (divide by 64)
101 = 250 kHz (divide by 32)
100 = 500 kHz (divide by 16)
011 = 1 MHz (divide by 8)
010 = 2 MHz (divide by 4)
001 = 4 MHz (divide by 2)
000 = 8 MHz (divide by 1)
bit 7-0 Unimplemented: Read as ‘0’
Note 1: This bit is automatically cleared when the ROI bit is set and an interrupt occurs.
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9.4 Clock Switching Operation
With few limitations, applications are free to switch
between any of the four clock sources (POSC, SOSC,
FRC and LPRC) under software control and at any
time. To limit the possible side effects that could result
from this flexibility, PIC24F devices have a safeguard
lock built into the switching process.
9.4.1 ENABLING CLOCK SWITCHING
To enable clock switching, the FCKSM Configuration bits
in CW2 must be programmed to ‘00’. (Refer to
Section 29.1 “Configuration Bits” for further details.)
If the FCKSM Configuration bits are unprogrammed
(‘1x’), the clock switching function and Fail-Safe Clock
Monitor function are disabled. This is the default setting.
The NOSCx control bits (OSCCON<10:8>) do not
control the clock selection when clock switching is dis-
abled. However, the COSCx bits (OSCCON<14:12>)
will reflect the clock source selected by the FNOSCx
Configuration bits.
The OSWEN control bit (OSCCON<0>) has no effect
when clock switching is disabled. It is held at ‘0’ at all
times.
REGISTER 9-3: OSCTUN: FRC OSCILLATOR TUNE REGISTER
U-0 U-0 U-0 U-0 U-0 U-0 U-0 U-0
— — — — — — — —
bit 15 bit 8
U-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
—— TUN5(1)TUN4(1)TUN3(1)TUN2(1)TUN1(1)TUN0(1)
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-6 Unimplemented: Read as ‘0’
bit 5-0 TUN<5:0>: FRC Oscillator Tuning bits(1)
011111 = Maximum frequency deviation
011110 =
000001 =
000000 = Center frequency, oscillator is running at factory calibrated frequency
111111 =
100001 =
100000 = Minimum frequency deviation
Note 1: Increments or decrements of TUN<5:0> may not change the FRC frequency in equal steps over the FRC
tuning range and may not be monotonic.
Note: The Primary Oscillator mode has three
different submodes (XT, HS and EC)
which are determined by the POSCMDx
Configuration bits. While an application
can switch to and from Primary Oscillator
mode in software, it cannot switch
between the different primary submodes
without reprogramming the device.
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9.4.2 OSCILLATOR SWITCHING
SEQUENCE
At a minimum, performing a clock switch requires this
basic sequence:
1. If desired, read the COSCx bits
(OSCCON<14:12>) to determine the current
oscillator source.
2. Perform the unlock sequence to allow a write to
the OSCCON register high byte.
3. Write the appropriate value to the NOSCx bits
(OSCCON<10:8>) for the new oscillator source.
4. Perform the unlock sequence to allow a write to
the OSCCON register low byte.
5. Set the OSWEN bit to initiate the oscillator
switch.
Once the basic sequence is completed, the system
clock hardware responds automatically as follows:
1. The clock switching hardware compares the
COSCx bits with the new value of the NOSCx
bits. If they are the same, then the clock switch
is a redundant operation. In this case, the
OSWEN bit is cleared automatically and the
clock switch is aborted.
2. If a valid clock switch has been initiated, the
LOCK (OSCCON<5>) and CF (OSCCON<3>)
bits are cleared.
3. The new oscillator is turned on by the hardware
if it is not currently running. If a crystal oscillator
must be turned on, the hardware will wait until
the OST expires. If the new source is using the
PLL, then the hardware waits until a PLL lock is
detected (LOCK = 1).
4. The hardware waits for 10 clock cycles from the
new clock source and then performs the clock
switch.
5. The hardware clears the OSWEN bit to indicate a
successful clock transition. In addition, the
NOSCx bits values are transferred to the COSCx
bits.
6. The old clock source is turned off at this time, with
the exception of LPRC (if WDT or FSCM are
enabled) or SOSC (if SOSCEN remains set).
A recommended code sequence for a clock switch
includes the following:
1. Disable interrupts during the OSCCON register
unlock and write sequence.
2. Execute the unlock sequence for the OSCCON
high byte by writing 78h and 9Ah to
OSCCON<15:8> in two back-to-back
instructions.
3. Write new oscillator source to the NOSCx bits in
the instruction immediately following the unlock
sequence.
4. Execute the unlock sequence for the OSCCON
low byte by writing 46h and 57h to
OSCCON<7:0> in two back-to-back instructions.
5. Set the OSWEN bit in the instruction immediately
following the unlock sequence.
6. Continue to execute code that is not
clock-sensitive (optional).
7. Invoke an appropriate amount of software delay
(cycle counting) to allow the selected oscillator
and/or PLL to start and stabilize.
8. Check to see if OSWEN is ‘0’. If it is, the switch
was successful. If OSWEN is still set, then
check the LOCK bit to determine the cause of
failure.
The core sequence for unlocking the OSCCON register
and initiating a clock switch is shown in Example 9-1.
EXAMPLE 9-1: BASIC CODE SEQUENCE
FOR CLOCK SWITCHING
Note 1: The processor will continue to execute
code throughout the clock switching
sequence. Timing-sensitive code should
not be executed during this time.
2: Direct clock switches between any
Primary Oscillator mode with PLL and
FRCPLL mode are not permitted. This
applies to clock switches in either direc-
tion. In these instances, the application
must switch to FRC mode as a transition
clock source between the two PLL modes.
;Place the new oscillator selection in W0
;OSCCONH (high byte) Unlock Sequence
MOV #OSCCONH, w1
MOV #0x78, w2
MOV #0x9A, w3
MOV.b w2, [w1]
MOV.b w3, [w1]
;Set new oscillator selection
MOV.b WREG, OSCCONH
;OSCCONL (low byte) unlock sequence
MOV #OSCCONL, w1
MOV #0x46, w2
MOV #0x57, w3
MOV.b w2, [w1]
MOV.b w3, [w1]
;Start oscillator switch operation
BSET OSCCON,#0
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DS39996F-page 152 2010-2011 Microchip Technology Inc.
9.5 Secondary Oscillator (SOSC)
9.5.1 BASIC SOSC OPERATION
PIC24FJ128GA310 family devices do not have to set the
SOSCEN bit to use the secondary oscillator. Any module
requiring the SOSC (such as RTCC, Timer1 or DSWDT)
will automatically turn on the SOSC when the clock signal
is needed. The SOSC, however, has a long start-up time.
To avoid delays for peripheral start-up, the SOSC can be
manually started using the SOSCEN bit.
To use the secondary oscillator, the SOSCSEL<1:0> bits
(CW3<9:8>) must be configured in an oscillator mode –
either ‘11’ or ‘01’. Setting the SOSCSEL bits to ‘00’
configures the SOSC pins for Digital mode, enabling
digital I/O functionality on the pins. Digital functionality
will not be available if the SOSC is configured in either of
the oscillator modes.
9.5.2 LOW-POWER SOSC OPERATION
The secondary oscillator can operate in two distinct
levels of power consumption, based on device configu-
ration. In Low-Power mode, the oscillator operates in a
low drive strength, low-power state. By default, the
oscillator uses a higher drive strength, and therefore,
requires more power. The Secondary Oscillator Mode
Configuration bits, SOSCSEL<1:0> (CW3<9:8>),
determine the oscillator’s power mode. Programming
the SOSCSEL bits to ‘01’ selects low-power operation.
The lower drive strength of this mode makes the SOSC
more sensitive to noise and requires a longer start-up
time. When Low-Power mode is used, care must be
taken in the design and layout of the SOSC circuit to
ensure that the oscillator starts up and oscillates
properly.
9.5.3 EXTERNAL (DIGITAL) CLOCK
MODE (SCLKI)
The SOSC can also be configured to run from an
external 32 kHz clock source, rather than the internal
oscillator. In this mode, also referred to as Digital mode,
the clock source provided on the SCLKI pin is used to
clock any modules that are configured to use the
secondary oscillator. In this mode, the crystal driving
circuit is disabled and the SOSCEN bit (OSCCON<1>)
has no effect.
9.5.4 SOSC LAYOUT CONSIDERATIONS
The pinout limitations on low pin count devices, such as
those in the PIC24FJ128GA310 family, may make the
SOSC more susceptible to noise than other PIC24FJ
devices. Unless proper care is taken in the design and
layout of the SOSC circuit, this external noise may
introduce inaccuracies into the oscillator’s period.
In general, the crystal circuit connections should be as
short as possible. It is also good practice to surround
the crystal circuit with a ground loop or ground plane.
For more information on crystal circuit design, please
refer to Section 6 “Oscillator” (DS39700) of the
“PIC24F Family Reference Manual”. Additional infor-
mation is also available in these Microchip Application
Notes:
•AN826, “Crysta l Oscillator Basics and Crystal
Selection for rfPIC® and PICmicro® Devices”
(DS00826)
•AN849, “Basic PIC micro ® Oscillator Design”
(DS00849).
9.6 Reference Clock Output
In addition to the CLKO output (FOSC/2) available in
certain oscillator modes, the device clock in the
PIC24FJ128GA310 family devices can also be config-
ured to provide a reference clock output signal to a port
pin. This feature is available in all oscillator configura-
tions and allows the user to select a greater range of
clock submultiples to drive external devices in the
application.
This reference clock output is controlled by the
REFOCON register (Register 9-4). Setting the ROEN
bit (REFOCON<15>) makes the clock signal available
on the REFO pin. The RODIV bits (REFOCON<11:8>)
enable the selection of 16 different clock divider
options.
The ROSSLP and ROSEL bits (REFOCON<13:12>)
control the availability of the reference output during
Sleep mode. The ROSEL bit determines if the oscillator
on OSC1 and OSC2, or the current system clock source,
is used for the reference clock output. The ROSSLP bit
determines if the reference source is available on REFO
when the device is in Sleep mode.
To use the reference clock output in Sleep mode, both
the ROSSLP and ROSEL bits must be set. The device
clock must also be configured for one of the primary
modes (EC, HS or XT). Otherwise, if the POSCEN bit
is also not set, the oscillator on OSC1 and OSC2 will be
powered down when the device enters Sleep mode.
Clearing the ROSEL bit allows the reference output
frequency to change as the system clock changes
during any clock switches.
2010-2011 Microchip Technology Inc. DS39996F-page 153
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REGISTER 9-4: REFOCON: REFERENCE OSCILLATOR CONTROL REGISTER
R/W-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
ROEN — ROSSLP ROSEL RODIV3 RODIV2 RODIV1 RODIV0
bit 15 bit 8
U-0 U-0 U-0 U-0 U-0 U-0 U-0 U-0
— — — — — — — —
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 ROEN: Reference Oscillator Output Enable bit
1 = Reference oscillator is enabled on REFO pin
0 = Reference oscillator is disabled
bit 14 Unimplemented: Read as ‘0’
bit 13 ROSSLP: Reference Oscillator Output Stop in Sleep bit
1 = Reference oscillator continues to run in Sleep
0 = Reference oscillator is disabled in Sleep
bit 12 ROSEL: Reference Oscillator Source Select bit
1 = Primary oscillator is used as the base clock. Note that the crystal oscillator must be enabled using
the FOSC<2:0> bits; the crystal maintains the operation in Sleep mode.
0 = System clock is used as the base clock; base clock reflects any clock switching of the device
bit 11-8 RODIV<3:0>: Reference Oscillator Divisor Select bits
1111 = Base clock value divided by 32,768
1110 = Base clock value divided by 16,384
1101 = Base clock value divided by 8,192
1100 = Base clock value divided by 4,096
1011 = Base clock value divided by 2,048
1010 = Base clock value divided by 1,024
1001 = Base clock value divided by 512
1000 = Base clock value divided by 256
0111 = Base clock value divided by 128
0110 = Base clock value divided by 64
0101 = Base clock value divided by 32
0100 = Base clock value divided by 16
0011 = Base clock value divided by 8
0010 = Base clock value divided by 4
0001 = Base clock value divided by 2
0000 = Base clock value
bit 7-0 Unimplemented: Read as ‘0’
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DS39996F-page 154 2010-2011 Microchip Technology Inc.
NOTES:
2010-2011 Microchip Technology Inc. DS39996F-page 155
PIC24FJ128GA310 FAMILY
10.0 POWER-SAVING FEATURE S
The PIC24FJ128GA310 family of devices provides the
ability to manage power consumption by selectively
managing clocking to the CPU and the peripherals. In
general, a lower clock frequency and a reduction in the
number of circuits being clocked reduces consumed
power.
PIC24FJ128GA310 family devices manage power
consumption with five strategies:
• Instruction-Based Power Reduction Modes
• Hardware-Based Power Reduction Features
• Clock Frequency Control
• Software Controlled Doze Mode
• Selective Peripheral Control in Software
Combinations of these methods can be used to
selectively tailor an application’s power consumption,
while still maintaining critical application features, such
as timing-sensitive communications.
10.1 Overview of Power-Saving Modes
In addition to full-power operation, otherwise known as
Run mode, the PIC24FJ128GA310 family of devices
offers three Instruction-Based, Power-Saving modes
and one Hardware-Based mode:
•Idle
• Sleep (Sleep and Low-Voltage Sleep)
• Deep Sleep
•V
BAT (with and without RTCC)
All four modes can be activated by powering down dif-
ferent functional areas of the microcontroller, allowing
progressive reductions of operating and Idle power
consumption. In addition, three of the modes can be
tailored for more power reduction, at a trade-off of
some operating features. Ta b l e 1 0 - 1 lists all of the
operating modes, in order of increasing power savings.
Table 10-2 summarizes how the microcontroller exits
the different modes. Specific information is provided in
the following sections.
TABLE 10-1: OPERATING MODES FOR PIC24FJ128GA310 FAMILY DEVICES
Note: This data sheet summarizes the features
of this group of PIC24FJ devices. It is not
intended to be a comprehensive
reference source. For more information,
refer to the “PIC24F Family Reference
Manual”, “Section 57. Power-Saving
Features with VBAT” (DS30622).
Mode Entry
Active Syste ms
Core Peripherals Data RAM
Retention RTCC(1)DSGPR0/
DSGPR1
Retention
Run (default) N/AYYYYY
Idle Instruction N Y Y Y Y
Sleep:
Sleep Instruction N S(2)YYY
Low-Voltage Sleep Instruction +
RETEN bit
NS
(2)YYY
Deep Sleep:
Deep Sleep Instruction +
DSEN bit +
NNNYY
VBAT:
with RTCC Hardware N N N Y Y
Note 1: If RTCC is otherwise enabled in firmware.
2: A select peripheral can operate during this mode from LPRC or some external clock.
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DS39996F-page 156 2010-2011 Microchip Technology Inc.
TABLE 10-2: EXITING POWER SAVING MODES
10.1.1 INSTRUCTION-BASED
POWER-SAVING MODES
Three of the power-saving modes are entered through
the execution of the PWRSAV instruction. Sleep mode
stops clock operation and halts all code execution. Idle
mode halts the CPU and code execution, but allows
peripheral modules to continue operation. Deep Sleep
mode stops clock operation, code execution and all
peripherals, except RTCC and DSWDT. It also freezes
I/O states and removes power to Flash memory and
may remove power to SRAM.
The assembly syntax of the PWRSAV instruction is shown
in Example 10-1. Sleep and Idle modes are entered
directly with a single assembler command. Deep Sleep
requires an additional sequence to unlock and enable
the entry into Deep Sleep, which is described in
Section 10.4.1 “Entering Deep Sleep Mode”.
Sleep and Idle modes can be exited as a result of an
enabled interrupt, WDT time-out or a device Reset.
When the device exits these modes, it is said to
“wake-up”.
The features enabled with the low-voltage/retention
regulator results in some changes to the way that Sleep
mode behaves. See Section 10.3 “Sleep Mode”.
10.1.1.1 Interrupts Coincident with Power
Save Instructions
Any interrupt that coincides with the execution of a
PWRSAV instruction will be held off until entry into
Sleep/Deep Sleep or Idle mode has completed. The
device will then wake-up from Sleep/Deep Sleep or Idle
mode.
EXAMPL E 10-1: PWRSAV INSTRUCTION SYNTAX
Mode
Exit Conditions Code
Execution
Resumes(2)
Interrupts Resets RTCC
Alarm WDT VDD
Restore
All INT0 All POR MCLR
Idle Y Y Y Y Y Y Y N/A Next instruction
Sleep (all modes) Y Y Y Y Y Y Y N/A
Deep Sleep N Y N Y Y Y Y(1)N/A Reset vector
VBAT N N N N N N N Y Reset vector
Note 1: Deep Sleep WDT.
2: Code execution resumption is also valid for all the exit conditions; for example, a MCLR and POR exit will
cause code execution from the Reset vector.
Note: SLEEP_MODE and IDLE_MODE are
constants defined in the assembler
include file for the selected device.
To enter Deep Sleep, the DSCON<0> bit
should be cleared before setting the
DSEN bit,
// Syntax to enter Sleep mode:
PWRSAV #SLEEP_MODE ; Put the device into SLEEP mode
//
//Synatx to enter Idle mode:
PWRSAV #IDLE_MODE ; Put the device into IDLE mode
//
// Syntax to enter Deep Sleep mode:
// First use the unlock sequence to set the DSEN bit (see Example 10-2)
CLR DSCON
CLR DSCON ; (repeat the command)
BSET DSCON, #DSEN ; Enable Deep Sleep
BSET DSCON, #DSEN ; Enable Deep Sleep (repeat the command)
PWRSAV #SLEEP_MODE ; Put the device into Deep SLEEP mode
2010-2011 Microchip Technology Inc. DS39996F-page 157
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10.1.2 HARDWARE-BASED
POWER-SAVING MODE
The hardware-based VBAT mode does not require any
action by the user during code development. Instead, it
is a hardware design feature that allows the micro-
controller to retain critical data (using the DSGPRn
registers) and maintain the RTCC when VDD is removed
from the application. This is accomplished by supplying
a backup power source to a specific power pin. VBAT
mode is described in more detail in Section 10.5 “Vbat
Mode”.
10.1.3 LOW-VOLTAGE/RETENTION
REGULATOR
PIC24FJ128GA310 family devices incorporate a
second on-chip voltage regulator, designed to provide
power to select microcontroller features at 1.2V nomi-
nal. This regulator allows features, such as data RAM
and the WDT, to be maintained in power-saving modes
where they would otherwise be inactive, or maintain
them at a lower power than would otherwise be the
case.
The low-voltage/retention regulator is only available
when Sleep or Deep Sleep modes are invoked. It is
controlled by the LPCFG Configuration bit (CW1<10>)
and in firmware by the RETEN bit (RCON<12>).
LPCFG must be programmed (= 0) and the RETEN bit
must be set (= 1) for the regulator to be enabled.
10.2 Idle Mode
Idle mode has these features:
• The CPU will stop executing instructions.
• The WDT is automatically cleared.
• The system clock source remains active. By
default, all peripheral modules continue to operate
normally from the system clock source, but can
also be selectively disabled (see Section 10.8
“Selective Peripheral Module Control”).
• If the WDT or FSCM is enabled, the LPRC will
also remain active.
The device will wake from Idle mode on any of these
events:
• Any interrupt that is individually enabled
• Any device Reset
• A WDT time-out
On wake-up from Idle, the clock is re-applied to the
CPU and instruction execution begins immediately,
starting with the instruction following the PWRSAV
instruction or the first instruction in the ISR.
10.3 Sleep Mode
Sleep mode includes these features:
• The system clock source is shut down. If an
on-chip oscillator is used, it is turned off.
• The device current consumption will be reduced
to a minimum provided that no I/O pin is sourcing
current.
• The I/O pin directions and states are frozen.
• The Fail-Safe Clock Monitor does not operate
during Sleep mode since the system clock source
is disabled.
• The LPRC clock will continue to run in Sleep
mode if the WDT or RTCC, with LPRC as clock
source, is enabled.
• The WDT, if enabled, is automatically cleared
prior to entering Sleep mode.
• Some device features or peripherals may
continue to operate in Sleep mode. This includes
items, such as the input change notification on the
I/O ports, or peripherals that use an external clock
input. Any peripheral that requires the system
clock source for its operation will be disabled in
Sleep mode.
The device will wake-up from Sleep mode on any of
these events:
• On any interrupt source that is individually
enabled
• On any form of device Reset
• On a WDT time-out
On wake-up from Sleep, the processor will restart with
the same clock source that was active when Sleep
mode was entered.
10.3.1 LOW-VOLTAGE/RETENTION SLEEP
MODE
Low-Voltage/Retention Sleep mode functions as Sleep
mode with the same features and wake-up triggers.
The difference is that the low-voltage/retention regula-
tor allows core digital logic voltage (VCORE) to drop to
1.2V nominal. This permits an incremental reduction of
power consumption over what would be required if
VCORE was maintained at a 1.8V (minimum) level.
Low-Voltage Sleep mode requires a longer wake-up
time than Sleep mode, due to the additional time
required to bring VCORE back to 1.8V (known as TREG).
In addition, the use of the low-voltage/retention regula-
tor limits the amount of current that can be sourced to
any active peripherals, such as the RTCC/LCD, etc.
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DS39996F-page 158 2010-2011 Microchip Technology Inc.
10.4 Deep Sleep Mode
Deep Sleep mode provides the lowest levels of power
consumption available from the Instruction-Based
modes.
Deep Sleep modes have these features:
• The system clock source is shut down. If an
on-chip oscillator is used, it is turned off.
• The device current consumption will be reduced
to a minimum.
• The I/O pin directions and states are frozen.
• The Fail-Safe Clock Monitor does not operate
during Sleep mode since the system clock source
is disabled.
• The LPRC clock will continue to run in Deep
Sleep mode if the WDT or RTCC with LPRC as
clock source is enabled.
• The dedicated Deep Sleep WDT and BOR
systems, if enabled, are used.
• The RTCC and its clock source continue to run, if
enabled. All other peripherals are disabled.
Entry into Deep Sleep mode is completely under
software control. Exit from the Deep Sleep modes can
be triggered from any of the following events:
• POR event
•MCLR
event
• RTCC alarm (If the RTCC is present)
• External Interrupt 0
• Deep Sleep Watchdog Timer (DSWDT) time-out
10.4.1 ENTERING DEEP SLEEP MODE
Deep Sleep mode is entered by setting the DSEN bit in
the DSCON register, and then executing a Sleep
command (PWRSAV #SLEEP_MODE) within one instruc-
tion cycle, to minimize the chance that Deep Sleep will
be spuriously entered.
If the PWRSAV command is not given within one
instruction cycle, the DSEN bit will be cleared by the
hardware and must be set again by the software before
entering Deep Sleep mode. The DSEN bit is also
automatically cleared when exiting Deep Sleep mode.
The sequence to enter Deep Sleep mode is:
1. If the application requires the Deep Sleep WDT,
enable it and configure its clock source. For
more information on Deep Sleep WDT, see
Section 10.4.5 “Deep Sleep WDT”.
2. If the application requires Deep Sleep BOR,
enable it by programming the DSBOREN
Configuration bit (FDS<6>).
3. If the application requires wake-up from Deep
Sleep on RTCC alarm, enable and configure the
RTCC module. For more information on RTCC,
see 22.0 “Real-Time Clock and Calendar
(RTCC)”.
4. If needed, save any critical application context
data by writing it to the DSGPR0 and DSGPR1
registers (optional).
5. Enable Deep Sleep mode by setting the DSEN
bit (DSCON<15>).
6. Enter Deep Sleep mode by issuing 3 NOP
commands, and then a PWRSAV #0 instruction.
Any time the DSEN bit is set, all bits in the DSWAKE
register will be automatically cleared.
EXAMPL E 10-2: THE REP EAT SEQUENCE
Note: To re-enter Deep Sleep after a Deep Sleep
wake-up, allow a delay of at least 3 TCY
after clearing the RELEASE bit.
Note: A repeat sequence is required to set the
DSEN bit. The repeat sequence (repeating
the instruction twice) is required to write
into any of the Deep Sleep registers
(DSCON, DSWAKE, DSGPR0, DSGPR1).
This is required to avoid the user from
entering Deep Sleep by mistake. Any write
to these registers has to be done twice to
actually complete the write (see
Example 10-2).
Example 1:
mov #8000, w2 ; enable DS
mov w2, DSCON
mov w2, DSCON ; second write re quired to
actually w rite to DSCON
Example 2:
bset DSCON, #15
nop
nop
nop
bset DSCON, #15 ;
enable DS (two writes required)
2010-2011 Microchip Technology Inc. DS39996F-page 159
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10.4.2 EXITING DEEP SLEEP MODES
Deep Sleep modes exit on any one of the following events:
• POR event on VDD supply. If there is no DSBOR
circuit to re-arm the VDD supply POR circuit, the
external VDD supply must be lowered to the
natural arming voltage of the POR circuit.
• DSWDT time-out. When the DSWDT timer times
out, the device exits Deep Sleep.
• RTCC alarm (if RTCEN = 1).
• Assertion (‘0’) of the MCLR pin.
• Assertion of the INT0 pin (if the interrupt was
enabled before Deep Sleep mode was entered).
The polarity configuration is used to determine the
assertion level (‘0’ or ‘1’) of the pin that will cause
an exit from Deep Sleep mode. Exiting from Deep
Sleep mode requires a change on the INT0 pin
while in Deep Sleep mode.
Exiting Deep Sleep generally does not retain the state
of the device and is equivalent to a Power-on Reset
(POR) of the device. Exceptions to this include the
RTCC (if present), which remains operational through
the wake-up, the DSGPRx registers and DSWDT.
Wake-up events that occur from the time Deep Sleep
exits, until the time the POR sequence completes, are
not ignored. The DSWAKE register will capture ALL
wake-up events, from DSEN set to RELEASE clear.
The sequence for exiting Deep Sleep mode is:
1. After a wake-up event, the device exits Deep
Sleep and performs a POR. The DSEN bit is
cleared automatically. Code execution resumes
at the Reset vector.
2. To determine if the device exited Deep Sleep,
read the Deep Sleep bit, DPSLP (RCON<10>).
This bit will be set if there was an exit from Deep
Sleep mode. If the bit is set, clear it.
3. Determine the wake-up source by reading the
DSWAKE register.
4. Determine if a DSBOR event occurred during
Deep Sleep mode by reading the DSBOR bit
(DSCON<1>).
5. If application context data has been saved, read
it back from the DSGPR0 and DSGPR1 registers.
6. Clear the RELEASE bit (DSCON<0>).
10.4.3 SAVING CONTEXT DATA WITH THE
DSGPRn REGISTERS
As exiting Deep Sleep mode causes a POR, most
Special Function Registers reset to their default POR
values. In addition, because VCORE power is not sup-
plied in Deep Sleep mode, information in data RAM
may be lost when exiting this mode.
Applications which require critical data to be saved
prior to Deep Sleep may use the Deep Sleep General
Purpose registers, DSGPR0 and DSGPR1, or data
EEPROM (if available). Unlike other SFRs, the
contents of these registers are preserved while the
device is in Deep Sleep mode. After exiting Deep
Sleep, software can restore the data by reading the
registers and clearing the RELEASE bit (DSCON<0>).
10.4.4 I/O PINS IN DEEP SLEEP MODES
During Deep Sleep, the general purpose I/O pins retain
their previous states and the Secondary Oscillator
(SOSC) will remain running, if enabled. Pins that are
configured as inputs (TRISx bit set), prior to entry into
Deep Sleep, remain high-impedance during Deep
Sleep. Pins that are configured as outputs (TRISx bit
clear), prior to entry into Deep Sleep, remain as output
pins during Deep Sleep. While in this mode, they
continue to drive the output level determined by their
corresponding LATx bit at the time of entry into Deep
Sleep.
Once the device wakes back up, all I/O pins continue to
maintain their previous states, even after the device
has finished the POR sequence and is executing
application code again. Pins configured as inputs
during Deep Sleep remain high-impedance, and pins
configured as outputs continue to drive their previous
value. After waking up, the TRIS and LAT registers, and
the SOSCEN bit (OSCCON<1>) are reset. If firmware
modifies any of these bits or registers, the I/O will not
immediately go to the newly configured states. Once
the firmware clears the RELEASE bit (DSCON<0>),
the I/O pins are “released”. This causes the I/O pins to
take the states configured by their respective TRIS and
LAT bit values.
This means that keeping the SOSC running after
waking up requires the SOSCEN bit to be set before
clearing RELEASE.
If the Deep Sleep BOR (DSBOR) is enabled, and a
DSBOR or a true POR event occurs during Deep
Sleep, the I/O pins will be immediately released, similar
to clearing the RELEASE bit. All previous state
information will be lost, including the general purpose
DSGPR0 and DSGPR1 contents.
Note: Any interrupt pending, when entering
Deep Sleep mode, is cleared.
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If a MCLR Reset event occurs during Deep Sleep, the
DSGPRx, DSCON and DSWAKE registers will remain
valid, and the RELEASE bit will remain set. The state
of the SOSC will also be retained. The I/O pins,
however, will be reset to their MCLR Reset state. Since
RELEASE is still set, changes to the SOSCEN bit
(OSCCON<1>) cannot take effect until the RELEASE
bit is cleared.
In all other Deep Sleep wake-up cases, application
firmware must clear the RELEASE bit in order to
reconfigure the I/O pins.
10.4.5 DEEP SLEEP WDT
To enable the DSWDT in Deep Sleep mode, program
the Configuration bit, DSWDTEN (CW4<7>). The
device WDT need not be enabled for the DSWDT to
function. Entry into Deep Sleep modes automatically
reset the DSWDT.
The DSWDT clock source is selected by the
DSWDTOSC Configuration bit (CW4<4>). The post-
scaler options are programmed by the DSWDPS<4:0>
Configuration bits (FDS<3:0>). The minimum time-out
period that can be achieved is 1 ms and the maximum is
25.7 days. For more details on the FDS Configuration
register and DSWDT configuration options, refer to 29.0
“Special Features” .
10.4.5.1 Switching Clocks in Deep Sleep
Mode
Both the RTCC and the DSWDT may run from either
SOSC or the LPRC clock source. This allows both the
RTCC and DSWDT to run without requiring both the
LPRC and SOSC to be enabled together, reducing
power consumption.
Running the RTCC from LPRC will result in a loss of
accuracy in the RTCC, of approximately 5 to 10%. If a
more accurate RTCC is required, it must be run from
the SOSC clock source. The RTCC clock source is
selected with the RTCOSC Configuration bit (FDS<5>).
Under certain circumstances, it is possible for the
DSWDT clock source to be off when entering Deep
Sleep mode. In this case, the clock source is turned on
automatically (if DSWDT is enabled), without the need
for software intervention. However, this can cause a
delay in the start of the DSWDT counters. In order to
avoid this delay when using SOSC as a clock source,
the application can activate SOSC prior to entering
Deep Sleep mode.
10.4.6 CHECKING AND CLEARING THE
STATUS OF DEEP SLEEP
Upon entry into Deep Sleep mode, the status bit,
DPSLP (RCON<10>), becomes set and must be
cleared by the software.
On power-up, the software should read this status bit to
determine if the Reset was due to an exit from Deep
Sleep mode, and clear the bit if it is set. Of the four
possible combinations of DPSLP and POR bit states,
three cases can be considered:
• Both the DPSLP and POR bits are cleared. In this
case, the Reset was due to some event other
than a Deep Sleep mode exit.
• The DPSLP bit is clear, but the POR bit is set; this
is a normal POR.
• Both the DPSLP and POR bits are set. This
means that Deep Sleep mode was entered, the
device was powered down and Deep Sleep mode
was exited.
10.4.7 POWER-ON RESETS (PORs)
VDD voltage is monitored to produce PORs. Since
exiting from Deep Sleep mode functionally looks like a
POR, the technique described in Section 10.4.6
“Checking and Clearing the Status of Deep Sleep”
should be used to distinguish between Deep Sleep and
a true POR event. When a true POR occurs, the entire
device, including all Deep Sleep logic (Deep Sleep
registers, RTCC, DSWDT, etc.) is reset.
10.5 VBAT Mode
This mode represents the lowest power state that the
microcontroller can achieve and still resume operation.
VBAT mode is automatically triggered when the micro-
controller’s main power supply on VDD fails. When this
happens, the microcontroller’s on-chip power switch
connects to a back-up power source, such as a battery,
supplied to the VBAT pin. This maintains a few key
systems at an extremely low-power draw until VDD is
restored.
The power supplied on VBAT only runs two systems: the
RTCC and the Deep Sleep Semaphore registers
(DSGPR0 and DSGPR1). To maintain these systems
during a sudden loss of VDD, it is essential to connect a
power source, other than VDD or AVDD, to the VBAT pin.
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When the RTCC is enabled, it continues to operate with
the same clock source (SOSC or LPRC) that was
selected prior to entering VBAT mode. There is no pro-
vision to switch to a lower power clock source after the
mode switch.
Since the loss of VDD is usually an unforeseen event, it
is recommended that the contents of the Deep Sleep
Semaphore registers be loaded with the data to be
retained at an early point in code execution.
10.5.1 VBAT MODE WITH NO RTCC
By disabling RTCC operation during VBAT mode, power
consumption is reduced to the lowest of all
power-saving modes. In this mode, only the Deep
Sleep Semaphore registers are maintained.
10.5.2 WAKE-UP FROM VBAT MODES
When VDD is restored to a device in VBAT mode, it auto-
matically wakes. Wake-up occurs with a POR, after
which the device starts executing code from the Reset
vector. All SFRs, except the Deep Sleep Semaphores
and RTCC registers are reset to their POR values. If
the RTCC was not configured to run during VBAT mode,
it will remain disabled and RTCC will not run. Wake-up
timing is similar to that for a normal POR.
To differentiate a wake-up from VBAT mode from other
POR states, check the VBAT status bit (RCON2<0>). If
this bit is set while the device is starting to execute the
code from Reset vector, it indicates that there has been
an exit from VBAT mode. The application must clear the
VBAT bit to ensure that future VBAT wake-up events are
captured.
If a POR occurs without a power source connected to
the VBAT pin, the VBPOR bit (RCON2<1>) is set. If this
bit is set on a POR, it indicates that a battery needs to
be connected to the VBAT pin.
In addition, if the VBAT power source falls below the
level needed for Deep Sleep Semaphore operation
while in VBAT mode (e.g., the battery has been
drained), the VBPOR bit will be set. VBPOR is also set
when the microcontroller is powered up the very first
time, even if power is supplied to VBAT.
With VBPOR set, the user should clear it, and the next
time, this bit will only set when VDD = 0 and the VBAT
pin has gone below level (0.4V-0.6V).
10.5.3 I/O PINS DURING VBAT MODES
All I/O pins should be maintained at VSS level; no I/O
pins should be given VDD (refer to “Absolute Maximum
Ratings”) during VBAT mode. The only exceptions are
the SOSCI and SOSCO pins, which maintain their states
if the secondary oscillator is being used as the RTCC
clock source. It is the user’s responsibility to restore the
I/O pins to their proper states, using the TRIS and LAT
bits, once VDD has been restored.
10.5.4 SAVING CONTEXT DATA WITH THE
DSGPRn REGISTERS
As with Deep Sleep mode, all SFRs are reset to their
POR values after VDD has been restored. Only the
Deep Sleep Semaphore registers are preserved. Appli-
cations which require critical data to be saved should
save it in DSGPR0 and DSGPR1.
The BOR should be enabled for the reliable operation
of the VBAT.
Note: If the VBAT mode is not used, the
recommendation is to connect the VBAT
pin to VDD.
When the VBAT mode is used (connected
to the battery), as well as when it is not
used, it is always recommended to
connect a 0.1 µF capacitor from the VBAT
pin to ground. The capacitor should be
located very close to the VBAT pin.
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REGISTER 10-1: DSCON: DEEP SLEEP CONTROL REGISTER(1)
R/W-0 U-0 U-0 U-0 U-0 U-0 U-0 U-0
DSEN — — — — — — —
bit 15 bit 8
U-0 U-0 U-0 U-0 U-0 r-0 R/W-0 R/C-0, HS
— — — — — r DSBOR(2)RELEASE
bit 7 bit 0
Legend: C = Clearable bit U = Unimplemented bit, read as ‘0’
R = Readable bit W = Writable bit HS = Hardware Settable bit r = Reserved bit
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 DSEN: Deep Sleep Enable bit
1 = Enters Deep Sleep on execution of PWRSAV #0
0 = Enters normal Sleep on execution of PWRSAV #0
bit 14-3 Unimplemented: Read as ‘0’
bit 2 Reserved: Maintain as ‘0’
bit 1 DSBOR: Deep Sleep BOR Event bit(2)
1 = The DSBOR was active and a BOR event was detected during Deep Sleep
0 = The DSBOR was not active or was active but did not detect a BOR event during Deep Sleep
bit 0 RELEASE: I/O Pin State Release bit
1 = Upon waking from Deep Sleep, I/O pins maintain their states previous to Deep Sleep entry
0 = Release I/O pins from their state previous to Deep Sleep entry, and allow their respective TRIS and
LAT bits to control their states
Note 1: All register bits are reset only in the case of a POR event outside of Deep Sleep mode.
2: Unlike all other events, a Deep Sleep BOR event will NOT cause a wake-up from Deep Sleep; this
re-arms POR.
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REGISTER 10-2: DSWAKE: DEEP SLEEP WAKE-UP SOURCE REGISTER(1)
U-0 U-0 U-0 U-0 U-0 U-0 U-0 R/W-0, HS
— — — — — — —DSINT0
bit 15 bit 8
R/W-0, HS U-0 U-0 R/W-0, HS R/W-0, HS R/W-0, HS U-0 U-0
DSFLT —— DSWDT DSRTCC DSMCLR — —
bit 7 bit 0
Legend: HS = Hardware Settable bit
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-9 Unimplemented: Read as ‘0’
bit 8 DSINT0: Interrupt-on-Change bit
1 = Interrupt-on-change was asserted during Deep Sleep
0 = Interrupt-on-change was not asserted during Deep Sleep
bit 7 DSFLT: Deep Sleep Fault Detected bit
1 = A Fault occurred during Deep Sleep and some Deep Sleep configuration settings may have been
corrupted
0 = No Fault was detected during Deep Sleep
bit 6-5 Unimplemented: Read as ‘0’
bit 4 DSWDT: Deep Sleep Watchdog Timer Time-out bit
1 = The Deep Sleep Watchdog Timer timed out during Deep Sleep
0 = The Deep Sleep Watchdog Timer did not time out during Deep Sleep
bit 3 DSRTCC: Real-Time Clock and Calendar Alarm bit
1 = The Real-Time Clock and Calendar triggered an alarm during Deep Sleep
0 = The Real-Time Clock and Calendar did not trigger an alarm during Deep Sleep
bit 2 DSMCLR: MCLR Event bit
1 = The MCLR pin was active and was asserted during Deep Sleep
0 = The MCLR pin was not active, or was active, but not asserted during Deep Sleep
bit 1-0 Unimplemented: Read as ‘0’
Note 1: All register bits are cleared when the DSEN (DSCON<15>) bit is set.
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REGISTER 10-3: RCON2: RESET AND SYSTEM CONTROL REGISTER 2
U-0 U-0 U-0 U-0 U-0 U-0 U-0 U-0
— — — — — — — —
bit 15 bit 8
U-0 U-0 U-0 r-0 R/CO-1 R/CO-1 R/CO-1 R/CO-0
— — — r VDDBOR(1)VDDPOR(1,2)VBPOR(1,3)VBAT(1)
bit 7 bit 0
Legend: CO = Clearable Only bit r = Reserved bit
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-5 Unimplemented: Read as ‘0’
bit 4 Reserved: Maintain as ‘0’
bit 3 VDDBOR: VDD Brown-out Reset Flag bit(1)
1 =A VDD Brown-out Reset has occurred (set by hardware)
0 =A V
DD Brown-out Reset has not occurred
bit 2 VDDPOR: VDD Power-On Reset Flag bit(1,2)
1 =A VDD Power-up Reset has occurred (set by hardware)
0 =A V
DD Power-up Reset has not occurred
bit 1 VBPOR: VBPOR Flag bit(1,3)
1 =A VBAT POR has occurred (no battery connected to the VBAT pin, or VBAT power below Deep Sleep
Semaphore retention level, set by hardware)
0 =A VBAT POR has not occurred
bit 0 VBAT: VBAT Flag bit(1)
1 = A POR exit has occurred while power applied to the VBAT pin (set by hardware)
0 = A POR exit from VBAT has not occurred
Note 1: This bit is set in hardware only; it can only be cleared in software.
2: Indicates a VDD POR. Setting the POR bit (RCON<0>) indicates a VCORE POR.
3: This bit is set when the device is originally powered up, even if power is present on VBAT. It is recom-
mended that the user clear this flag, and the next time, this bit will only set when the VBAT voltage goes
below 0.4-0.6V with VDD = 0.
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10.6 Clock Frequency and Clock
Switching
In Run and Idle modes, all PIC24FJ devices allow for a
wide range of clock frequencies to be selected under
application control. If the system clock configuration is
not locked, users can choose low-power or
high-precision oscillators by simply changing the NOSC
bits. The process of changing a system clock during
operation, as well as limitations to the process, are
discussed in more detail in 9.0 “Oscillator Configura-
tion”.
10.7 Doze Mode
Generally, changing clock speed and invoking one of
the power-saving modes are the preferred strategies
for reducing power consumption. There may be
circumstances, however, where this is not practical. For
example, it may be necessary for an application to
maintain uninterrupted synchronous communication,
even while it is doing nothing else. Reducing system
clock speed may introduce communication errors,
while using a power-saving mode may stop
communications completely.
Doze mode is a simple and effective alternative method
to reduce power consumption while the device is still
executing code. In this mode, the system clock
continues to operate from the same source and at the
same speed. Peripheral modules continue to be
clocked at the same speed while the CPU clock speed
is reduced. Synchronization between the two clock
domains is maintained, allowing the peripherals to
access the SFRs while the CPU executes code at a
slower rate.
Doze mode is enabled by setting the DOZEN bit
(CLKDIV<11>). The ratio between peripheral and core
clock speed is determined by the DOZE<2:0> bits
(CLKDIV<14:12>). There are eight possible
configurations, from 1:1 to 1:128, with 1:1 being the
default.
It is also possible to use Doze mode to selectively reduce
power consumption in event driven applications. This
allows clock-sensitive functions, such as synchronous
communications, to continue without interruption while
the CPU Idles, waiting for something to invoke an
interrupt routine. Enabling the automatic return to
full-speed CPU operation on interrupts is enabled by set-
ting the ROI bit (CLKDIV<15>). By default, interrupt
events have no effect on Doze mode operation.
10.8 Selective Peripheral Module
Control
Idle and Doze modes allow users to substantially
reduce power consumption by slowing or stopping the
CPU clock. Even so, peripheral modules still remain
clocked, and thus, consume power. There may be
cases where the application needs what these modes
do not provide: the allocation of power resources to
CPU processing with minimal power consumption from
the peripherals.
PIC24F devices address this requirement by allowing
peripheral modules to be selectively disabled, reducing
or eliminating their power consumption. This can be
done with two control bits:
• The Peripheral Enable bit, generically named,
“XXXEN”, located in the module’s main control
SFR.
• The Peripheral Module Disable (PMD) bit,
generically named, “XXXMD”, located in one of
the PMD Control registers (XXXMD bits are in
PMD1, PMD2, PMD3, PMD4, PMD6, PMD7
registers).
Both bits have similar functions in enabling or disabling
its associated module. Setting the PMD bit for a module
disables all clock sources to that module, reducing its
power consumption to an absolute minimum. In this
state, the control and status registers associated with
the peripheral will also be disabled, so writes to those
registers will have no effect and read values will be
invalid. Many peripheral modules have a corresponding
PMD bit.
In contrast, disabling a module by clearing its XXXEN
bit disables its functionality, but leaves its registers
available to be read and written to. Power consumption
is reduced, but not by as much as the PMD bits are
used. Most peripheral modules have an enable bit;
exceptions include capture, compare and RTCC.
To achieve more selective power savings, peripheral
modules can also be selectively disabled when the
device enters Idle mode. This is done through the control
bit of the generic name format, “XXXIDL”. By default, all
modules that can operate during Idle mode will do so.
Using the disable on Idle feature disables the module
while in Idle mode, allowing further reduction of power
consumption during Idle mode, enhancing power
savings for extremely critical power applications.
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NOTES:
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11.0 I/O PORTS
All of the device pins (except VDD, VSS, MCLR and
OSCI/CLKI) are shared between the peripherals and
the parallel I/O ports. All I/O input ports feature Schmitt
Trigger (ST) inputs for improved noise immunity.
11.1 Para l l e l I/O (P I O ) P o rts
A parallel I/O port that shares a pin with a peripheral is,
in general, subservient to the peripheral. The periph-
eral’s output buffer data and control signals are
provided to a pair of multiplexers. The multiplexers
select whether the peripheral or the associated port
has ownership of the output data and control signals of
the I/O pin. The logic also prevents “loop through”, in
which a port’s digital output can drive the input of a
peripheral that shares the same pin. Figure 11-1 shows
how ports are shared with other peripherals and the
associated I/O pin to which they are connected.
When a peripheral is enabled and the peripheral is
actively driving an associated pin, the use of the pin as
a general purpose output pin is disabled. The I/O pin
may be read, but the output driver for the parallel port
bit will be disabled. If a peripheral is enabled, but the
peripheral is not actively driving a pin, that pin may be
driven by a port.
All port pins have three registers directly associated
with their operation as digital I/O and one register asso-
ciated with their operation as analog input. The Data
Direction register (TRISx) determines whether the pin
is an input or an output. If the data direction bit is a ‘1’,
then the pin is an input. All port pins are defined as
inputs after a Reset. Reads from the Output Latch reg-
ister (LATx), read the latch; writes to the latch, write the
latch. Reads from the port (PORTx), read the port pins;
writes to the port pins, write the latch.
Any bit and its associated data and control registers
that are not valid for a particular device will be
disabled. That means the corresponding LATx and
TRISx registers, and the port pin will read as zeros.
When a pin is shared with another peripheral or func-
tion that is defined as an input only, it is regarded as a
dedicated port because there is no other competing
source of inputs. RC13 and RC14 can be input ports
only; they cannot be configured as outputs.
FIGURE 11-1: BLOCK DIAGRAM OF A TYPICAL SHARED PORT STRUCTURE
Note: This data sheet summarizes the features of
this group of PIC24F devices. It is not
intended to be a comprehensive reference
source. For more information, refer to the
“PIC24F Family Reference Manual”,
Section 12. “I/O Ports with Peripheral
Pin Select (PPS)” (DS39711). The infor-
mation in this data sheet supersedes the
information in the FRM.
QD
CK
WR LAT +
TRIS Latch
I/O Pin
WR PORT
Data Bus
QD
CK
Data Latch
Read PORT
Read TRIS
1
0
1
0
WR TRIS
Peripheral Output Data
Output Enable
Peripheral Input Data
I/O
Peripheral Module
Peripheral Output Enable
PIO Module
Output Multipl exers
Output Data
Input Data
Peripheral Module Enable
Read LAT
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11.1.1 I/O PORT WRITE/READ TIMING
One instruction cycle is required between a port direction
change or port write operation and a read operation of
the same port. Typically, this instruction would be a NOP.
11.1.2 OPEN-DRAIN CONFIGURATION
In addition to the PORT, LAT and TRIS registers for data
control, each port pin can also be individually configured
for either a digital or open-drain output. This is controlled
by the Open-Drain Control register, ODCx, associated
with each port. Setting any of the bits configures the
corresponding pin to act as an open-drain output.
The open-drain feature allows the generation of
outputs higher than VDD (e.g., 5V) on any desired
digital only pins by using external pull-up resistors. The
maximum open-drain voltage allowed is the same as
the maximum VIH specification.
11.2 Configuring Anal og Port Pins
(ANSx)
The ANSx and TRISx registers control the operation of
the pins with analog function. Each port pin with analog
function is associated with one of the ANS bits (see
Register 11-1 through Register 11-6), which decides if
the pin function should be analog or digital. Refer to
Table 11-1 for detailed behavior of the pin for different
ANSx and TRISx bit settings.
When reading the PORT register, all pins configured as
analog input channels will read as cleared (a low level).
11.2.1 ANALOG INPUT PINS AND
VOLTAGE CONSIDERATIONS
The voltage tolerance of pins used as device inputs is
dependent on the pin’s input function. Most input pins are
able to handle DC voltages of up to 5.5V, a level typical
for digital logic circuits. However, several pins can only
tolerate voltages up to VDD. Voltage excursions beyond
VDD on these pins should always be avoided.
Table 11-2 summarizes the different voltage tolerances.
Refer to Section 32.0 “Electrical Characteristics” for
more details.
TABLE 11-1: CONFIGURING ANALOG/DIGITAL FUNCTION OF AN I/O PIN
Pin Function ANSx Setting TRISx Setting Comments
Analog Input 11It is recommended to keep ANSx = 1.
Analog Output 11It is recommended to keep ANSx = 1.
Digital Input 01Firmware must wait at least one instruction cycle
after configuring a pin as a digital input before a valid
input value can be read.
Digital Output 00Make sure to disable the analog output function on
the pin if any is present.
TABLE 11-2: INPUT VOLTAGE LEVELS FOR PORT OR PIN TOLERATED DESCRIPTION INPUT
Port or Pin Tolerated Input Description
PORTA<15:14, 7:0>(1)
5.5V Tolerates input levels above VDD; useful
for most standard logic.
PORTB<15:7, 5:2>
PORTC<3:1>(1)
PORTD<15:8, 5:0>(1)
PORTE<9:8, 4:0>(1)
PORTF<13:12, 8:0>(1)
PORTG<15:12, 9, 6:0>(1)
PORTA<10:9>(1)
VDD Only VDD input levels are tolerated.
PORTB<6, 1:0>
PORTC<15:12, 4>(1)
PORTD<7:6>
PORTE<7:5>(1)
PORTG<8:7>
Note 1: Not all of these pins are implemented in 64-pin or 80-pin devices. Refer to Section 1.0 “Device Overview”
for a complete description of port pin implementation.
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REGISTER 11-1: ANSA: PORTA ANALOG FUNCTION SELECTION REGISTER
U-0 U-0 U-0 U-0 U-0 U-0 U-0 U-0
— — — — — — — —
bit 15 bit 8
R/W-1 R/W-1 U-0 U-0 U-0 U-0 U-0 U-0
ANSA7(1)ANSA6(1)— — — — — —
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-8 Unimplemented: Read as ‘0’
bit 7-6 ANSA<7:6>: Analog Function Selection bits(1)
1 = Pin is configured in Analog mode; I/O port read is disabled
0 = Pin is configured in Digital mode; I/O port read is enabled
bit 5-0 Unimplemented: Read as ‘0’
Note 1: These bits are not available in 64-pin and 80-pin devices.
REGISTER 11-2: ANSB: PORTB ANALOG FUNCTION SELECTION REGISTER
R/W-1 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1
ANSB15 ANSB14 ANSB13 ANSB12 ANSB11 ANSB10 ANSB9 ANSB8
bit 15 bit 8
R/W-1 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1
ANSB7 ANSB6 ANSB5 ANSB4 ANSB3 ANSB2 ANSB1 ANSB0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-0 ANSB<15:0>: Analog Function Selection bits
1 = Pin is configured in Analog mode; I/O port read is disabled
0 = Pin is configured in Digital mode; I/O port read is enabled
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REGISTER 11-3: ANSC: PORTC ANALOG FUNCTION SELECTION REGISTER
U-0 U-0 U-0 U-0 U-0 U-0 U-0 U-0
— — — — — — — —
bit 15 bit 8
U-0 U-0 U-0 R/W-1 U-0 U-0 U-0 U-0
— — — ANSC4(1)— — — —
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-5 Unimplemented: Read as ‘0’
bit 4 ANSC4: Analog Function Selection bit(1)
1 = Pin is configured in Analog mode; I/O port read is disabled
0 = Pin is configured in Digital mode; I/O port read is enabled
bit 3-0 Unimplemented: Read as ‘0’
Note 1: This bit is not available in 64-pin and 80-pin devices.
REGISTER 11-4: ANSD: PORTD ANALOG FUNCTION SELECTION REGISTER
U-0 U-0 U-0 U-0 R/W-1 R/W-1 U-0 U-0
———— ANSD11 ANSD10 — —
bit 15 bit 8
R/W-1 R/W-1 U-0 U-0 U-0 U-0 U-0 U-0
ANSD7 ANSD6 — — — — — —
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-12 Unimplemented: Read as ‘0’
bit 11 ANSD<11:10>: Analog Function Selection bit
1 = Pin is configured in Analog mode; I/O port read is disabled
0 = Pin is configured in Digital mode; I/O port read is enabled
bit 9-8 Unimplemented: Read as ‘0’
bit 7-6 ANSD<7:6>: Analog Function Selection bit
1 = Pin is configured in Analog mode; I/O port read is disabled
0 = Pin is configured in Digital mode; I/O port read is enabled
bit 5-0 Unimplemented: Read as ‘0’
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REGISTER 11-5: ANSE: PORTE ANALOG FUNCTION SELECTION REGISTER(1)
U-0 U-0 U-0 U-0 U-0 U-0 R/W-1 U-0
— — — — — — ANSE9(2)—
bit 15 bit 8
R/W-1 R/W-1 R/W-1 R/W-1 U-0 U-0 U-0 U-0
ANSE7 ANSE6 ANSE5 ANSE4 — — — —
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-10 Unimplemented: Read as ‘0’
bit 9 ANSE9: Analog Function Selection bits(2)
1 = Pin is configured in Analog mode; I/O port read is disabled
0 = Pin is configured in Digital mode; I/O port read is enabled
bit 8 Unimplemented: Read as ‘0’
bit 7-4 ANSE<7:4>: Analog Function Selection bits(1)
1 = Pin is configured in Analog mode; I/O port read is disabled
0 = Pin is configured in Digital mode; I/O port read is enabled
bit 3-0 Unimplemented: Read as ‘0’
Note 1: This register is not available in 64-pin and 80-pin devices.
2: This bit is unimplemented on 64-pin devices. In 80-pin devices, this bit needs to be cleared to get digital
functionality on RE9.
REGISTER 11-6: ANSG: PORTG ANALOG FUNCTION SELECTION REGISTER
U-0 U-0 U-0 U-0 U-0 U-0 R/W-1 R/W-1
— — — — — — ANSG9 ANSG8
bit 15 bit 8
R/W-1 R/W-1 U-0 U-0 U-0 U-0 U-0 U-0
ANSG7 ANSG6 — — — — — —
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-10 Unimplemented: Read as ‘0’
bit 9-6 ANSG<9:6>: Analog Function Selection bits
1 = Pin is configured in Analog mode; I/O port read is disabled
0 = Pin is configured in Digital mode; I/O port read is enabled
bit 5-0 Unimplemented: Read as ‘0’
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11.3 Input Change Notification
The input change notification function of the I/O ports
allows the PIC24FJ128GA310 family of devices to gen-
erate interrupt requests to the processor in response to
a Change-of-State (COS) on selected input pins. This
feature is capable of detecting input Change-of-States,
even in Sleep mode when the clocks are disabled.
Depending on the device pin count, there are up to
82 external inputs that may be selected (enabled) for
generating an interrupt request on a Change-of-State.
Registers, CNEN1 through CNEN6, contain the inter-
rupt enable control bits for each of the CN input pins.
Setting any of these bits enables a CN interrupt for the
corresponding pins.
Each CN pin has both a weak pull-up and a weak
pull-down connected to it. The pull-ups act as a current
source that is connected to the pin, while the
pull-downs act as a current sink that is connected to the
pin. These eliminate the need for external resistors
when push button or keypad devices are connected.
The pull-ups and pull-downs are separately enabled
using the CNPU1 through CNPU6 registers (for
pull-ups) and the CNPD1 through CNPD6 registers (for
pull-downs). Each CN pin has individual control bits for
its pull-up and pull-down. Setting a control bit enables
the weak pull-up or pull-down for the corresponding
pin.
When the internal pull-up is selected, the pin pulls up to
VDD – 1.1V (typical). When the internal pull-down is
selected, the pin pulls down to VSS.
EXAMPLE 11-1: PORT WRITE/READ IN ASSEMBLY
EXAMPLE 11-2: PORT WRITE/READ IN ‘C’
Note: Pull-ups on change notification pins
should always be disabled whenever the
port pin is configured as a digital output.
MOV 0xFF00, W0 ; Configure PORTB<15:8 > as in puts
MOV W0, TRISB ; and PORTB<7:0 > as ou tputs
NOP ; Delay 1 cycle
BTSS PORTB, #13 ; Next I nstruct ion
TRISB = 0xFF00; // Configure PORTB<15:8> as inputs and PORTB<7:0> as outputs
Nop(); // Delay 1 cycle
If (PORTBbits.RB13){ }; // Next Instruction
2010-2011 Microchip Technology Inc. DS39996F-page 173
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11.4 Peripheral Pin Sel ect (PPS)
A major challenge in general purpose devices is provid-
ing the largest possible set of peripheral features while
minimizing the conflict of features on I/O pins. In an
application that needs to use more than one peripheral
multiplexed on a single pin, inconvenient work arounds
in application code, or a complete redesign, may be the
only option.
The Peripheral Pin Select (PPS) feature provides an
alternative to these choices by enabling the user’s
peripheral set selection and its placement on a wide
range of I/O pins. By increasing the pinout options
available on a particular device, users can better tailor
the microcontroller to their entire application, rather
than trimming the application to fit the device.
The Peripheral Pin Select feature operates over a fixed
subset of digital I/O pins. Users may independently
map the input and/or output of any one of many digital
peripherals to any one of these I/O pins. PPS is per-
formed in software and generally does not require the
device to be reprogrammed. Hardware safeguards are
included that prevent accidental or spurious changes to
the peripheral mapping once it has been established.
11.4.1 AVAILABLE PINS
The PPS feature is used with a range of up to 44 pins,
depending on the particular device and its pin count.
Pins that support the Peripheral Pin Select feature
include the designation, “RPn” or “RPIn”, in their full pin
designation, where “n” is the remappable pin number.
“RP” is used to designate pins that support both remap-
pable input and output functions, while “RPI” indicates
pins that support remappable input functions only.
PIC24FJ128GA310 family devices support a larger
number of remappable input only pins than remappable
input/output pins. In this device family, there are up to
32 remappable input/output pins, depending on the pin
count of the particular device selected. These pins are
numbered, RP0 through RP31. Remappable input only
pins are numbered above this range, from RPI32 to
RPI43 (or the upper limit for that particular device).
See Table 1-4 for a summary of pinout options in each
package offering.
11.4.2 AVAILABLE PERIPHERALS
The peripherals managed by the PPS are all digital
only peripherals. These include general serial commu-
nications (UART and SPI), general purpose timer clock
inputs, timer related peripherals (input capture and out-
put compare) and external interrupt inputs. Also
included are the outputs of the comparator module,
since these are discrete digital signals.
PPS is not available for these peripherals:
•I
2C™ (input and output)
• Change notification inputs
• RTCC alarm output(s)
• EPMP signals (input and output)
• LCD signals
• Analog inputs
•INT0
A key difference between pin select and non-pin select
peripherals is that pin select peripherals are not asso-
ciated with a default I/O pin. The peripheral must
always be assigned to a specific I/O pin before it can be
used. In contrast, non-pin select peripherals are always
available on a default pin, assuming that the peripheral
is active and not conflicting with another peripheral.
11.4.2.1 Peripheral Pin Select Function
Priority
Pin-selectable peripheral outputs (e.g., OC, UART
transmit) will take priority over general purpose digital
functions on a pin, such as EPMP and port I/O. Special-
ized digital outputs (e.g., USB on USB-enabled
devices) will take priority over PPS outputs on the same
pin. The pin diagrams list peripheral outputs in the
order of priority. Refer to them for priority concerns on
a particular pin.
Unlike PIC24F devices with fixed peripherals,
pin-selectable peripheral inputs will never take owner-
ship of a pin. The pin’s output buffer will be controlled
by the TRISx setting or by a fixed peripheral on the pin.
If the pin is configured in Digital mode then the PPS
input will operate correctly. If an analog function is
enabled on the pin, the PPS input will be disabled.
11.4.3 CONTROLLING PERIPHERAL PIN
SELECT
PPS features are controlled through two sets of Special
Function Registers (SFRs): one to map peripheral
inputs and one to map outputs. Because they are
separately controlled, a particular peripheral’s input
and output (if the peripheral has both) can be placed on
any selectable function pin without constraint.
The association of a peripheral to a peripheral-selectable
pin is handled in two different ways, depending on if an
input or an output is being mapped.
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DS39996F-page 174 2010-2011 Microchip Technology Inc.
11.4.3.1 Input Mapping
The inputs of the Peripheral Pin Select options are
mapped on the basis of the peripheral; that is, a control
register associated with a peripheral dictates the pin it
will be mapped to. The RPINRx registers are used to
configure peripheral input mapping (see Register 11-7
through Register 11-26).
Each register contains two sets of 6-bit fields, with each
set associated with one of the pin-selectable peripher-
als. Programming a given peripheral’s bit field, with an
appropriate 6-bit value, maps the RPn/RPIn pin with
that value to that peripheral. For any given device, the
valid range of values for any of the bit fields corre-
sponds to the maximum number of Peripheral Pin
Selections supported by the device.
TABLE 11-3: SELECTABLE INPUT SOURCES (MAPS INPUT TO FUNCTION)(1)
Input Name Function Name Register Function Mapping
Bits
DSM Modulation Input MDMIN RPINR30 MDMIR<5:0>
DSM Carrier 1 Input MDCIN1 RPINR31 MDC1R<5:0>
DSM Carrier 2 Input MDCIN2 RPINR31 MDC2R<5:0>
External Interrupt 1 INT1 RPINR0 INT1R<5:0>
External Interrupt 2 INT2 RPINR1 INT2R<5:0>
External Interrupt 3 INT3 RPINR1 INT3R<5:0>
External Interrupt 4 INT4 RPINR2 INT4R<5:0>
Input Capture 1 IC1 RPINR7 IC1R<5:0>
Input Capture 2 IC2 RPINR7 IC2R<5:0>
Input Capture 3 IC3 RPINR8 IC3R<5:0>
Input Capture 4 IC4 RPINR8 IC4R<5:0>
Input Capture 5 IC5 RPINR9 IC5R<5:0>
Input Capture 6 IC6 RPINR9 IC6R<5:0>
Input Capture 7 IC7 RPINR10 IC7R<5:0>
Output Compare Fault A OCFA RPINR11 OCFAR<5:0>
Output Compare Fault B OCFB RPINR11 OCFBR<5:0>
SPI1 Clock Input SCK1IN RPINR20 SCK1R<5:0>
SPI1 Data Input SDI1 RPINR20 SDI1R<5:0>
SPI1 Slave Select Input SS1IN RPINR21 SS1R<5:0>
SPI2 Clock Input SCK2IN RPINR22 SCK2R<5:0>
SPI2 Data Input SDI2 RPINR22 SDI2R<5:0>
SPI2 Slave Select Input SS2IN RPINR23 SS2R<5:0>
Timer1 External Clock T1CK RPINR23 T1CKR<5:0>
Timer2 External Clock T2CK RPINR3 T2CKR<5:0>
Timer3 External Clock T3CK RPINR3 T3CKR<5:0>
Timer4 External Clock T4CK RPINR4 T4CKR<5:0>
Timer5 External Clock T5CK RPINR4 T5CKR<5:0>
UART1 Clear To Send U1CTS RPINR18 U1CTSR<5:0>
UART1 Receive U1RX RPINR18 U1RXR<5:0>
UART2 Clear To Send U2CTS RPINR19 U2CTSR<5:0>
UART2 Receive U2RX RPINR19 U2RXR<5:0>
UART3 Clear To Send U3CTS RPINR21 U3CTSR<5:0>
UART3 Receive U3RX RPINR17 U3RXR<5:0>
UART4 Clear To Send U4CTS RPINR27 U4CTSR<5:0>
UART4 Receive U4RX RPINR27 U4RXR<5:0>
Note 1: Unless otherwise noted, all inputs use the Schmitt Trigger (ST) input buffers.
2010-2011 Microchip Technology Inc. DS39996F-page 175
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11.4.3.2 Output Mapping
In contrast to inputs, the outputs of the Peripheral Pin
Select options are mapped on the basis of the pin. In
this case, a control register associated with a particular
pin dictates the peripheral output to be mapped. The
RPORx registers are used to control output mapping.
Each register contains two 6-bit fields, with each field
being associated with one RPn pin (see Register 11-27
through Register 11-42). The value of the bit field
corresponds to one of the peripherals and that
peripheral’s output is mapped to the pin (see
Table 11-4).
Because of the mapping technique, the list of peripher-
als for output mapping also includes a null value of
‘000000’. This permits any given pin to remain discon-
nected from the output of any of the pin-selectable
peripherals.
TABLE 11-4: SELECTABLE OUTPUT SOURCES (MAPS FUNCTION TO OUTPUT)
Output Function Number(1)Function Output Name
0 NULL(2)Null
1 C1OUT Comparator 1 Output
2 C2OUT Comparator 2 Output
3 U1TX UART1 Transmit
4U1RTS
(3)UART1 Request To Send
5 U2TX UART2 Transmit
6U2RTS
(3)UART2 Request To Send
7 SDO1 SPI1 Data Output
8 SCK1OUT SPI1 Clock Output
9 SS1OUT SPI1 Slave Select Output
10 SDO2 SPI2 Data Output
11 SCK2OUT SPI2 Clock Output
12 SS2OUT SPI2 Slave Select Output
18 OC1 Output Compare 1
19 OC2 Output Compare 2
20 OC3 Output Compare 3
21 OC4 Output Compare 4
22 OC5 Output Compare 5
23 OC6 Output Compare 6
24 OC7 Output Compare 7
28 U3TX UART3 Transmit
29 U3RTS(3)UART3 Request To Send
30 U4TX UART4 Transmit
31 U4RTS(3)UART4 Request To Send
36 C3OUT Comparator 3 Output
37 MDOUT DSM Modulator Output
38-63 (unused) NC
Note 1: Setting the RPORx register with the listed value assigns that output function to the associated RPn pin.
2: The NULL function is assigned to all RPn outputs at device Reset and disables the RPn output function.
3: IrDA® BCLK functionality uses this output.
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DS39996F-page 176 2010-2011 Microchip Technology Inc.
11.4.3.3 Mapping Limitations
The control schema of the Peripheral Pin Select is
extremely flexible. Other than systematic blocks that
prevent signal contention, caused by two physical pins
being configured as the same functional input or two
functional outputs configured as the same pin, there
are no hardware enforced lock outs. The flexibility
extends to the point of allowing a single input to drive
multiple peripherals or a single functional output to
drive multiple output pins.
11.4.3.4 Mapping Exceptions for
PIC24FJ128GA310 Family Devices
Although the PPS registers theoretically allow for up to
64 remappable I/O pins, not all of these are imple-
mented in all devices. For PIC24FJ128GA310 family
devices, the maximum number of remappable pins
available is 44, which includes 12 input only pins. In
addition, some pins in the RP and RPI sequences are
unimplemented in lower pin count devices. The
differences in available remappable pins are
summarized in Ta b l e 11 - 5 .
When developing applications that use remappable
pins, users should also keep these things in mind:
• For the RPINRx registers, bit combinations corre-
sponding to an unimplemented pin for a particular
device are treated as invalid; the corresponding
module will not have an input mapped to it. For all
PIC24FJ128GA310 family devices, this includes
all values greater than 43 (‘101011’).
• For RPORx registers, the bit fields corresponding
to an unimplemented pin will also be
unimplemented. Writing to these fields will have
no effect.
11.4.4 CONTROLLING CONFIGURATION
CHANGES
Because peripheral remapping can be changed during
run time, some restrictions on peripheral remapping
are needed to prevent accidental configuration
changes. PIC24F devices include three features to
prevent alterations to the peripheral map:
• Control register lock sequence
• Continuous state monitoring
• Configuration bit remapping lock
11.4.4.1 Control Register Lock
Under normal operation, writes to the RPINRx and
RPORx registers are not allowed. Attempted writes will
appear to execute normally, but the contents of the
registers will remain unchanged. To change these reg-
isters, they must be unlocked in hardware. The register
lock is controlled by the IOLOCK bit (OSCCON<6>).
Setting IOLOCK prevents writes to the control
registers; clearing IOLOCK allows writes.
To set or clear IOLOCK, a specific command sequence
must be executed:
1. Write 46h to OSCCON<7:0>.
2. Write 57h to OSCCON<7:0>.
3. Clear (or set) IOLOCK as a single operation.
Unlike the similar sequence with the oscillator’s LOCK
bit, IOLOCK remains in one state until changed. This
allows all of the Peripheral Pin Selects to be configured
with a single unlock sequence, followed by an update
to all control registers, then locked with a second lock
sequence.
11.4.4.2 Continuous State Monitoring
In addition to being protected from direct writes, the
contents of the RPINRx and RPORx registers are
constantly monitored in hardware by shadow registers.
If an unexpected change in any of the registers occurs
(such as cell disturbances caused by ESD or other
external events), a Configuration Mismatch Reset will
be triggered.
11.4.4.3 Configuration Bit Pin Select Lock
As an additional level of safety, the device can be con-
figured to prevent more than one write session to the
RPINRx and RPORx registers. The IOL1WAY
(CW2<4>) Configuration bit blocks the IOLOCK bit
from being cleared after it has been set once. If
IOLOCK remains set, the register unlock procedure will
not execute and the Peripheral Pin Select Control reg-
isters cannot be written to. The only way to clear the bit
and re-enable peripheral remapping is to perform a
device Reset.
In the default (unprogrammed) state, IOL1WAY is set,
restricting users to one write session. Programming
IOL1WAY allows users unlimited access (with the
proper use of the unlock sequence) to the Peripheral
Pin Select registers.
TABLE 11-5: REMAPPABLE PIN EXCEPTIONS FOR PIC24FJ128GA310 FAMILY DEVICES
Device RP Pins (I/O) RPI Pins
Total Unimplemented Total Unimplemented
PIC24FJXXXGA306 29 RP5, RP15, RP31 1 RPI32-36, RPI38-43
PIC24FJXXXGA308 31 RP15 9 RPI32, RPI39, RPI41
PIC24FJXXXGA310 32 — 12 —
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11.4.5 CONSIDERATIONS FOR
PERIPHERAL PIN SELECTION
The ability to control Peripheral Pin Selection intro-
duces several considerations into application design
that could be overlooked. This is particularly true for
several common peripherals that are available only as
remappable peripherals.
The main consideration is that the Peripheral Pin
Selects are not available on default pins in the device’s
default (Reset) state. Since all RPINRx registers reset
to ‘111111’ and all RPORx registers reset to ‘000000’,
all Peripheral Pin Select inputs are tied to VSS and all
Peripheral Pin Select outputs are disconnected.
This situation requires the user to initialize the device
with the proper peripheral configuration before any
other application code is executed. Since the IOLOCK
bit resets in the unlocked state, it is not necessary to
execute the unlock sequence after the device has
come out of Reset. For application safety, however, it is
best to set IOLOCK and lock the configuration after
writing to the control registers.
Because the unlock sequence is timing-critical, it must
be executed as an assembly language routine in the
same manner as changes to the oscillator configura-
tion. If the bulk of the application is written in ‘C’, or
another high-level language, the unlock sequence
should be performed by writing in-line assembly.
Choosing the configuration requires the review of all
Peripheral Pin Selects and their pin assignments,
especially those that will not be used in the application.
In all cases, unused pin-selectable peripherals should
be disabled completely. Unused peripherals should
have their inputs assigned to an unused RPn/RPIn pin
function. I/O pins with unused RPn functions should be
configured with the null peripheral output.
The assignment of a peripheral to a particular pin does
not automatically perform any other configuration of the
pin’s I/O circuitry. In theory, this means adding a
pin-selectable output to a pin may mean inadvertently
driving an existing peripheral input when the output is
driven. Users must be familiar with the behavior of
other fixed peripherals that share a remappable pin and
know when to enable or disable them. To be safe, fixed
digital peripherals that share the same pin should be
disabled when not in use.
Along these lines, configuring a remappable pin for a
specific peripheral does not automatically turn that
feature on. The peripheral must be specifically config-
ured for operation, and enabled as if it were tied to a
fixed pin. Where this happens in the application code
(immediately following device Reset and peripheral con-
figuration, or inside the main application routine)
depends on the peripheral and its use in the application.
A final consideration is that Peripheral Pin Select func-
tions neither override analog inputs nor reconfigure
pins with analog functions for digital I/O. If a pin is
configured as an analog input on device Reset, it must
be explicitly reconfigured as digital I/O when used with
a Peripheral Pin Select.
Example 11-3 shows a configuration for bidirectional
communication with flow control using UART1. The
following input and output functions are used:
• Input Functions: U1RX, U1CTS
• Output Functions: U1TX, U1RTS
EXAMPLE 11 -3: CONFIGURING UART1
INPUT AND OUTPUT
FUNCTIONS
Note: In tying Peripheral Pin Select inputs to
RP63, RP63 need not exist on a device for
the registers to be reset to it.
// Unlock Registers
asm volatile( "MOV #OSCCON, w1 \n"
"MOV #0x46, w2 \n"
"MOV #0x57, w3 \n"
"MOV.b w2,
[w1]
\n"
"MOV.b w3,
[w1]
\n"
"BCLR OSCCON,#6") ;
// or use C30 built-in macro:
// __builtin_write_OSCCONL(OSCCON & 0xbf);
// Configure Input Functions (Table 11-2))
// Assign U1RX To Pin RP0
RPINR18bits.U1RXR = 0;
// Assign U1CTS To Pin RP1
RPINR18bits.U1CTSR = 1;
// Configure Output Functions (Table 11-4)
// Assign U1TX To Pin RP2
RPOR1bits.RP2R = 3;
// Assign U1RTS To Pin RP3
RPOR1bits.RP3R = 4;
// Lock Registers
asm volatile ("MOV #OSCCON, w1 \n"
"MOV #0x46, w2 \n"
"MOV #0x57, w3 \n"
"MOV.b w2,
[w1]
\n"
"MOV.b w3,
[w1]
\n"
"BSET OSCCON, #6" ;
// or use C30 built-in macro:
// __builtin_write_OSCCONL(OSCCON | 0x40);
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11.4.6 PERIPHERAL PIN SELECT
REGISTERS
The PIC24FJ128GA310 family of devices implements
a total of 35 registers for remappable peripheral
configuration:
• Input Remappable Peripheral Registers (19)
• Output Remappable Peripheral Registers (16)
Note: Input and output register values can only
be changed if IOLOCK (OSCCON<6>) = 0.
See Section 11.4.4.1 “Control Register
Lock” for a specific command sequence.
REGISTER 11-7: RPINR0: PERIPHERAL PIN SELECT INPUT REGISTER 0
U-0 U-0 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1
—— INT1R5 INT1R4 INT1R3 INT1R2 INT1R1 INT1R0
bit 15 bit 8
U-0 U-0 U-0 U-0 U-0 U-0 U-0 U-0
— — — — — — — —
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-14 Unimplemented: Read as ‘0’
bit 13-8 INT1R<5:0>: Assign External Interrupt 1 (INT1) to Corresponding RPn or RPIn Pin bits
bit 7-0 Unimplemented: Read as ‘0’
REGISTER 11-8: RPINR1: PERIPHERAL PIN SELECT INPUT REGISTER 1
U-0 U-0 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1
—— INT3R5 INT3R4 INT3R3 INT3R2 INT3R1 INT3R0
bit 15 bit 8
U-0 U-0 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1
—— INT2R5 INT2R4 INT2R3 INT2R2 INT2R1 INT2R0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-14 Unimplemented: Read as ‘0’
bit 13-8 INT3R<5:0>: Assign External Interrupt 3 (INT3) to Corresponding RPn or RPIn Pin bits
bit 7-6 Unimplemented: Read as ‘0’
bit 5-0 INT2R<5:0>: Assign External Interrupt 2 (INT2) to Corresponding RPn or RPIn Pin bits
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REGISTER 11-9: RPINR2: PERIPHERAL PIN SELECT INPUT REGISTER 2
U-0 U-0 U-0 U-0 U-0 U-0 U-0 U-0
— — — — — — — —
bit 15 bit 8
U-0 U-0 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1
—— INT4R5 INT4R4 INT4R3 INT4R2 INT4R1 INT4R0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-6 Unimplemented: Read as ‘0’
bit 5-0 INT4R<5:0>: Assign External Interrupt 4 (INT4) to Corresponding RPn or RPIn Pin bits
REGISTER 11-10: RPINR3: PERIPHERAL PIN SELECT INPUT REGISTER 3
U-0 U-0 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1
—— T3CKR5 T3CKR4 T3CKR3 T3CKR2 T3CKR1 T3CKR0
bit 15 bit 8
U-0 U-0 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1
—— T2CKR5 T2CKR4 T2CKR3 T2CKR2 T2CKR1 T2CKR0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-14 Unimplemented: Read as ‘0’
bit 13-8 T3CKR<5:0>: Assign Timer3 External Clock (T3CK) to Corresponding RPn or RPIn Pin bits
bit 7-6 Unimplemented: Read as ‘0’
bit 5-0 T2CKR<5:0>: Assign Timer2 External Clock (T2CK) to Corresponding RPn or RPIn Pin bits
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REGISTER 11-11: RPINR4: PERIPHERAL PIN SELECT INPUT REGISTER 4
U-0 U-0 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1
—— T5CKR5 T5CKR4 T5CKR3 T5CKR2 T5CKR1 T5CKR0
bit 15 bit 8
U-0 U-0 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1
—— T4CKR5 T4CKR4 T4CKR3 T4CKR2 T4CKR1 T4CKR0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-14 Unimplemented: Read as ‘0’
bit 13-8 T5CKR<5:0>: Assign Timer5 External Clock (T5CK) to Corresponding RPn or RPIn Pin bits
bit 7-6 Unimplemented: Read as ‘0’
bit 5-0 T4CKR<5:0>: Assign Timer4 External Clock (T4CK) to Corresponding RPn or RPIn Pin bits
REGISTER 11-12: RPINR7: PERIPHERAL PIN SELECT INPUT REGISTER 7
U-0 U-0 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1
—— IC2R5 IC2R4 IC2R3 IC2R2 IC2R1 IC2R0
bit 15 bit 8
U-0 U-0 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1
—— IC1R5 IC1R4 IC1R3 IC1R2 IC1R1 IC1R0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-14 Unimplemented: Read as ‘0’
bit 13-8 IC2R<5:0>: Assign Input Capture 2 (IC2) to Corresponding RPn or RPIn Pin bits
bit 7-6 Unimplemented: Read as ‘0’
bit 5-0 IC1R<5:0>: Assign Input Capture 1 (IC1) to Corresponding RPn or RPIn Pin bits
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REGISTER 11-13: RPINR8: PERIPHERAL PIN SELECT INPUT REGISTER 8
U-0 U-0 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1
—— IC4R5 IC4R4 IC4R3 IC4R2 IC4R1 IC4R0
bit 15 bit 8
U-0 U-0 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1
—— IC3R5 IC3R4 IC3R3 IC3R2 IC3R1 IC3R0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-14 Unimplemented: Read as ‘0’
bit 13-8 IC4R<5:0>: Assign Input Capture 4 (IC4) to Corresponding RPn or RPIn Pin bits
bit 7-6 Unimplemented: Read as ‘0’
bit 5-0 IC3R<5:0>: Assign Input Capture 3 (IC3) to Corresponding RPn or RPIn Pin bits
REGISTER 11-14: RPINR9: PERIPHERAL PIN SELECT INPUT REGISTER 9
U-0 U-0 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1
—— IC6R5 IC6R4 IC6R3 IC6R2 IC6R1 IC6R0
bit 15 bit 8
U-0 U-0 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1
—— IC5R5 IC5R4 IC5R3 IC5R2 IC5R1 IC5R0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-14 Unimplemented: Read as ‘0’
bit 13-8 IC6R<5:0>: Assign Input Capture 6 (IC6) to Corresponding RPn or RPIn Pin bits
bit 7-6 Unimplemented: Read as ‘0’
bit 5-0 IC5R<5:0>: Assign Input Capture 5 (IC5) to Corresponding RPn or RPIn Pin bits
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REGISTER 11-15: RPINR10: PERIP HERAL PIN SELECT INPUT REGISTER 10
U-0 U-0 U-0 U-0 U-0 U-0 U-0 U-0
— — — — — — — —
bit 15 bit 8
U-0 U-0 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1
—— IC7R5 IC7R4 IC7R3 IC7R2 IC7R1 IC7R0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-6 Unimplemented: Read as ‘0’
bit 5-0 IC7R<5:0>: Assign Input Capture 7 (IC7) to Corresponding RPn or RPIn Pin bits
REGISTER 11-16: RPINR11: PERIPHERAL PIN SELECT INPUT REGISTER 11
U-0 U-0 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1
—— OCFBR5 OCFBR4 OCFBR3 OCFBR2 OCFBR1 OCFBR0
bit 15 bit 8
U-0 U-0 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1
—— OCFAR5 OCFAR4 OCFAR3 OCFAR2 OCFAR1 OCFAR0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-14 Unimplemented: Read as ‘0’
bit 13-8 OCFBR<5:0>: Assign Output Compare Fault B (OCFB) to Corresponding RPn or RPIn Pin bits
bit 7-6 Unimplemented: Read as ‘0’
bit 5-0 OCFAR<5:0>: Assign Output Compare Fault A (OCFA) to Corresponding RPn or RPIn Pin bits
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REGISTER 11-17: RPINR17: PERIP HERAL PIN SELECT INPUT REGISTER 17
U-0 U-0 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1
—— U3RXR5 U3RXR4 U3RXR3 U3RXR2 U3RXR1 U3RXR0
bit 15 bit 8
U-0 U-0 U-0 U-0 U-0 U-0 U-0 U-0
— — — — — — — —
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-14 Unimplemented: Read as ‘0’
bit 13-8 U3RXR<5:0>: Assign UART3 Receive (U3RX) to Corresponding RPn or RPIn Pin bits
bit 7-0 Unimplemented: Read as ‘0’
REGISTER 11-18: RPINR18: PERIP HERAL PIN SELECT INPUT REGISTER 18
U-0 U-0 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1
—— U1CTSR5 U1CTSR4 U1CTSR3 U1CTSR2 U1CTSR1 U1CTSR0
bit 15 bit 8
U-0 U-0 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1
—— U1RXR5 U1RXR4 U1RXR3 U1RXR2 U1RXR1 U1RXR0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-14 Unimplemented: Read as ‘0’
bit 13-8 U1CTSR<5:0>: Assign UART1 Clear to Send (U1CTS) to Corresponding RPn or RPIn Pin bits
bit 7-6 Unimplemented: Read as ‘0’
bit 5-0 U1RXR<5:0>: Assign UART1 Receive (U1RX) to Corresponding RPn or RPIn Pin bits
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REGISTER 11-19: RPINR19: PERIP HERAL PIN SELECT INPUT REGISTER 19
U-0 U-0 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1
—— U2CTSR5 U2CTSR4 U2CTSR3 U2CTSR2 U2CTSR1 U2CTSR0
bit 15 bit 8
U-0 U-0 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1
—— U2RXR5 U2RXR4 U2RXR3 U2RXR2 U2RXR1 U2RXR0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-14 Unimplemented: Read as ‘0’
bit 13-8 U2CTSR<5:0>: Assign UART2 Clear to Send (U2CTS) to Corresponding RPn or RPIn Pin bits
bit 7-6 Unimplemented: Read as ‘0’
bit 5-0 U2RXR<5:0>: Assign UART2 Receive (U2RX) to Corresponding RPn or RPIn Pin bits
REGISTER 11-20: RPINR20: PERIP HERAL PIN SELECT INPUT REGISTER 20
U-0 U-0 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1
—— SCK1R5 SCK1R4 SCK1R3 SCK1R2 SCK1R1 SCK1R0
bit 15 bit 8
U-0 U-0 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1
— — SDI1R5 SDI1R4 SDI1R3 SDI1R2 SDI1R1 SDI1R0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-14 Unimplemented: Read as ‘0’
bit 13-8 SCK1R<5:0>: Assign SPI2 Clock Input (SCK2IN) to Corresponding RPn or RPIn Pin bits
bit 7-6 Unimplemented: Read as ‘0’
bit 5-0 SDI1R<5:0>: Assign SPI2 Data Input (SDI2) to Corresponding RPn or RPIn Pin bits
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REGISTER 11-21: RPINR21: PERIP HERAL PIN SELECT INPUT REGISTER 21
U-0 U-0 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1
—— U3CTSR5 U3CTSR4 U3CTSR3 U3CTSR2 U3CTSR1 U3CTSR0
bit 15 bit 8
U-0 U-0 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1
—— SS1R5 SS1R4 SS1R3 SS1R2 SS1R1 SS1R0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-14 Unimplemented: Read as ‘0’
bit 13-8 U3CTSR<5:0>: Assign UART3 Clear to Send (U3CTS) to Corresponding RPn or RPIn Pin bits
bit 7-6 Unimplemented: Read as ‘0’
bit 5-0 SS1R<5:0>: Assign SPI1 Slave Select Input (SS1IN) to Corresponding RPn or RPIn Pin bits
REGISTER 11-22: RPINR22: PERIP HERAL PIN SELECT INPUT REGISTER 22
U-0 U-0 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1
—— T1CKR5 T1CKR4 T1CKR3 T1CKR2 T1CKR1 T1CKR0
bit 15 bit 8
U-0 U-0 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1
—— SDI2R5 SDI2R4 SDI2R3 SDI2R2 SDI2R1 SDI2R0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-14 Unimplemented: Read as ‘0’
bit 13-8 T1CKR<5:0>: Assign Timer1External Clock (T1CK) to Corresponding RPn or RPIn Pin bits
bit 7-6 Unimplemented: Read as ‘0’
bit 5-0 SDI2R<5:0>: Assign SPI2 Data Input (SDI2) to Corresponding RPn or RPIn Pin bits
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REGISTER 11-23: RPINR23: PERIP HERAL PIN SELECT INPUT REGISTER 23
U-0 U-0 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1
—— T1CKR5 T1CKR4 T1CKR3 T1CKR2 T1CKR1 T1CKR0
bit 15 bit 8
U-0 U-0 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1
—— SS2R5 SS2R4 SS2R3 SS2R2 SS2R1 SS2R0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-14 Unimplemented: Read as ‘0’
bit 13-8 T1CKR<5:0>:
bit 7-6 Unimplemented: Read as ‘0’
bit 5-0 SS2R<5:0>: Assign SPI2 Slave Select Input (SS2IN) to Corresponding RPn or RPIn Pin bits
REGI STER 11-24 : RPINR27: PERIPHERAL PIN SELECT INPUT R EGISTER 27
U-0 U-0 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1
—— U4CTSR5 U4CTSR4 U4CTSR3 U4CTSR2 U4CTSR1 U4CTSR0
bit 15 bit 8
U-0 U-0 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1
—— U4RXR5 U4RXR4 U4RXR3 U4RXR2 U4RXR1 U4RXR0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-14 Unimplemented: Read as ‘0’
bit 13-8 U4CTSR<5:0>: Assign UART4 Clear-to-send Input (U4CTS) to Corresponding RPn or RPIn Pin bits
bit 7-6 Unimplemented: Read as ‘0’
bit 5-0 U4RXR<5:0>: Assign UART4 Receive Input (U4RX) to Corresponding RPn or RPIn Pin bits
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REGISTER 11-25: RPINR30: PERIP HERAL PIN SELECT INPUT REGISTER 30
U-0 U-0 U-0 U-0 U-0 U-0 U-0 U-0
— — — — — — — —
bit 15 bit 8
U-0 U-0 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1
—— MDMIR5 MDMIR4 MDMIR3 MDMIR2 MDMIR1 MDMIR0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-6 Unimplemented: Read as ‘0’
bit 5-0 MDMIR<5:0>: Assign TX Modulation Input (MDMI) to Corresponding RPn or RPIn Pin bits
REGISTER 11-26: RPINR31: PERIP HERAL PIN SELECT INPUT REGISTER 31
U-0 U-0 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1
—— MDC2R5 MDC2R4 MDC2R3 MDC2R2 MDC2R1 MDC2R0
bit 15 bit 8
U-0 U-0 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1
—— MDC1R5 MDC1R4 MDC1R3 MDC1R2 MDC21R1 MDC1R0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-14 Unimplemented: Read as ‘0’
bit 13-8 MDC2R<5:0>: Assign TX Carrier 2 Input (MDCIN2) to Corresponding RPn or RPIn Pin bits
bit 7-6 Unimplemented: Read as ‘0’
bit 5-0 MDC1R<5:0>: Assign SPI3 Data Input (MDCIN1) to Corresponding RPn or RPIn Pin bits
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REGISTER 11-27: RPOR0: PERIPHERAL PIN SELECT OUTPUT REGISTER 0
U-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
—— RP1R5 RP1R4 RP1R3 RP1R2 RP1R1 RP1R0
bit 15 bit 8
U-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
—— RP0R5 RP0R4 RP0R3 RP0R2 RP0R1 RP0R0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-14 Unimplemented: Read as ‘0’
bit 13-8 RP1R<5:0>: RP1 Output Pin Mapping bits
Peripheral output number n is assigned to pin, RP1 (see Table 11-4 for peripheral function numbers).
bit 7-6 Unimplemented: Read as ‘0’
bit 5-0 RP0R<5:0>: RP0 Output Pin Mapping bits
Peripheral output number n is assigned to pin, RP0 (see Table 11-4 for peripheral function numbers).
REGISTER 11-28: RPOR1: PERIPHERAL PIN SELECT OUTPUT REGISTER 1
U-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
—— RP3R5 RP3R4 RP3R3 RP3R2 RP3R1 RP3R0
bit 15 bit 8
U-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
—— RP2R5 RP2R4 RP2R3 RP2R2 RP2R1 RP2R0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-14 Unimplemented: Read as ‘0’
bit 13-8 RP3R<5:0>: RP3 Output Pin Mapping bits
Peripheral output number n is assigned to pin, RP3 (see Table 11-4 for peripheral function numbers).
bit 7-6 Unimplemented: Read as ‘0’
bit 5-0 RP2R<5:0>: RP2 Output Pin Mapping bits
Peripheral output number n is assigned to pin, RP2 (see Table 11-4 for peripheral function numbers).
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REGISTER 11-29: RPOR2: PERIPHERAL PIN SELECT OUTPUT REGISTER 2
U-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
——RP5R5
(1)RP5R4(1)RP5R3(1)RP5R2(1)RP5R1(1)RP5R0(1)
bit 15 bit 8
U-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
—— RP4R5 RP4R4 RP4R3 RP4R2 RP4R1 RP4R0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-14 Unimplemented: Read as ‘0’
bit 13-8 RP5R<5:0>: RP5 Output Pin Mapping bits(1)
Peripheral output number n is assigned to pin, RP5 (see Table 11-4 for peripheral function numbers).
bit 7-6 Unimplemented: Read as ‘0’
bit 5-0 RP4R<5:0>: RP4 Output Pin Mapping bits
Peripheral output number n is assigned to pin, RP4 (see Table 11-4 for peripheral function numbers).
Note 1: These bits are unimplemented in 64-pin devices; read as ‘0’.
REGISTER 11-30: RPOR3: PERIPHERAL PIN SELECT OUTPUT REGISTER 3
U-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
—— RP7R5 RP7R4 RP7R3 RP7R2 RP7R1 RP7R0
bit 15 bit 8
U-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
—— RP6R5 RP6R4 RP6R3 RP6R2 RP6R1 RP6R0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-14 Unimplemented: Read as ‘0’
bit 13-8 RP7R<5:0>: RP7 Output Pin Mapping bits
Peripheral output number n is assigned to pin, RP7 (see Table 11-4 for peripheral function numbers).
bit 7-6 Unimplemented: Read as ‘0’
bit 5-0 RP6R<5:0>: RP6 Output Pin Mapping bits
Peripheral output number n is assigned to pin, RP6 (see Table 11-4 for peripheral function numbers).
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REGISTER 11-31: RPOR4: PERIPHERAL PIN SELECT OUTPUT REGISTER 4
U-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
—— RP9R5 RP9R4 RP9R3 RP9R2 RP9R1 RP9R0
bit 15 bit 8
U-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
—— RP8R5 RP8R4 RP8R3 RP8R2 RP8R1 RP8R0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-14 Unimplemented: Read as ‘0’
bit 13-8 RP9R<5:0>: RP9 Output Pin Mapping bits
Peripheral output number n is assigned to pin, RP9 (see Table 11-4 for peripheral function numbers).
bit 7-6 Unimplemented: Read as ‘0’
bit 5-0 RP8R<5:0>: RP8 Output Pin Mapping bits
Peripheral output number n is assigned to pin, RP8 (see Table 11-4 for peripheral function numbers).
REGISTER 11-32: RPOR5: PERIPHERAL PIN SELECT OUTPUT REGISTER 5
U-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
—— RP11R5 RP11R4 RP11R3 RP11R2 RP11R1 RP11R0
bit 15 bit 8
U-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
—— RP10R5 RP10R4 RP10R3 RP10R2 RP10R1 RP10R0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-14 Unimplemented: Read as ‘0’
bit 13-8 RP11R<5:0>: RP11 Output Pin Mapping bits
Peripheral output number n is assigned to pin, RP11 (see Table 11-4 for peripheral function numbers).
bit 7-6 Unimplemented: Read as ‘0’
bit 5-0 RP10R<5:0>: RP10 Output Pin Mapping bits
Peripheral output number n is assigned to pin, RP10 (see Table 11-4 for peripheral function numbers).
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REGISTER 11-33: RPOR6: PERIPHERAL PIN SELECT OUTPUT REGISTER 6
U-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
—— RP13R5 RP13R4 RP13R3 RP13R2 RP13R1 RP13R0
bit 15 bit 8
U-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
—— RP12R5 RP12R4 RP12R3 RP12R2 RP12R1 RP12R0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-14 Unimplemented: Read as ‘0’
bit 13-8 RP13R<5:0>: RP13 Output Pin Mapping bits
Peripheral output number n is assigned to pin, RP13 (see Table 11-4 for peripheral function numbers).
bit 7-6 Unimplemented: Read as ‘0’
bit 5-0 RP12R<5:0>: RP12 Output Pin Mapping bits
Peripheral output number n is assigned to pin, RP12 (see Table 11-4 for peripheral function numbers).
REGISTER 11-34: RPOR7: PERIPHERAL PIN SELECT OUTPUT REGISTER 7
U-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
——RP15R5
(1)RP15R4(1)RP15R3(1)RP15R2(1)RP15R1(1)RP15R0(1)
bit 15 bit 8
U-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
—— RP14R5 RP14R4 RP14R3 RP14R2 RP14R1 RP14R0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-14 Unimplemented: Read as ‘0’
bit 13-8 RP15R<5:0>: RP15 Output Pin Mapping bits(1)
Peripheral output number n is assigned to pin, RP0 (see Table 11-4 for peripheral function numbers).
bit 7-6 Unimplemented: Read as ‘0’
bit 5-0 RP14R<5:0>: RP14 Output Pin Mapping bits
Peripheral output number n is assigned to pin, RP14 (see Table 11-4 for peripheral function numbers).
Note 1: These bits are unimplemented in 64-pin devices; read as ‘0’.
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REGISTER 11-35: RPOR8: PERIPHERAL PIN SELECT OUTPUT REGISTER 8
U-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
—— RP17R5 RP17R4 RP17R3 RP17R2 RP17R1 RP17R0
bit 15 bit 8
U-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
—— RP16R5 RP16R4 RP16R3 RP16R2 RP16R1 RP16R0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-14 Unimplemented: Read as ‘0’
bit 13-8 RP17R<5:0>: RP17 Output Pin Mapping bits
Peripheral output number n is assigned to pin, RP17 (see Table 11-4 for peripheral function numbers).
bit 7-6 Unimplemented: Read as ‘0’
bit 5-0 RP16R<5:0>: RP16 Output Pin Mapping bits
Peripheral output number n is assigned to pin, RP16 (see Table 11-4 for peripheral function numbers).
REGISTER 11-36: RPOR9: PERIPHERAL PIN SELECT OUTPUT REGISTER 9
U-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
—— RP19R5 RP19R4 RP19R3 RP19R2 RP19R1 RP19R0
bit 15 bit 8
U-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
—— RP18R5 RP18R4 RP18R3 RP18R2 RP18R1 RP18R0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-14 Unimplemented: Read as ‘0’
bit 13-8 RP19R<5:0>: RP19 Output Pin Mapping bits
Peripheral output number n is assigned to pin, RP19 (see Table 11-4 for peripheral function numbers).
bit 7-6 Unimplemented: Read as ‘0’
bit 5-0 RP18R<5:0>: RP18 Output Pin Mapping bits
Peripheral output number n is assigned to pin, RP18 (see Table 11-4 for peripheral function numbers).
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REGISTER 11-37: RPOR10: PERIPHERAL PIN SELECT OUTPUT REGISTER 10
U-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
—— RP21R5 RP21R4 RP21R3 RP21R2 RP21R1 RP21R0
bit 15 bit 8
U-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
—— RP20R5 RP20R4 RP20R3 RP20R2 RP20R1 RP20R0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-14 Unimplemented: Read as ‘0’
bit 13-8 RP21R<5:0>: RP21 Output Pin Mapping bits
Peripheral output number n is assigned to pin, RP21 (see Table 11-4 for peripheral function numbers).
bit 7-6 Unimplemented: Read as ‘0’
bit 5-0 RP20R<5:0>: RP20 Output Pin Mapping bits
Peripheral output number n is assigned to pin, RP20 (see Table 11-4 for peripheral function numbers).
REGISTER 11-38: RPOR11: PERIPHERAL PIN SELECT OUTPUT REGISTER 11
U-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
—— RP23R5 RP23R4 RP23R3 RP23R2 RP23R1 RP23R0
bit 15 bit 8
U-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
—— RP22R5 RP22R4 RP22R3 RP22R2 RP22R1 RP22R0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-14 Unimplemented: Read as ‘0’
bit 13-8 RP23R<5:0>: RP23 Output Pin Mapping bits
Peripheral output number n is assigned to pin, RP23 (see Table 11-4 for peripheral function numbers).
bit 7-6 Unimplemented: Read as ‘0’
bit 5-0 RP22R<5:0>: RP22 Output Pin Mapping bits
Peripheral output number n is assigned to pin, RP22 (see Table 11-4 for peripheral function numbers).
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REGISTER 11-39: RPOR12: PERIPHERAL PIN SELECT OUTPUT REGISTER 12
U-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
—— RP25R5 RP25R4 RP25R3 RP25R2 RP25R1 RP25R0
bit 15 bit 8
U-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
—— RP24R5 RP24R4 RP24R3 RP24R2 RP24R1 RP24R0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-14 Unimplemented: Read as ‘0’
bit 13-8 RP25R<5:0>: RP25 Output Pin Mapping bits
Peripheral output number n is assigned to pin, RP25 (see Table 11-4 for peripheral function numbers).
bit 7-6 Unimplemented: Read as ‘0’
bit 5-0 RP24R<5:0>: RP24 Output Pin Mapping bits
Peripheral output number n is assigned to pin, RP24 (see Table 11-4 for peripheral function numbers).
REGISTER 11-40: RPOR13: PERIPHERAL PIN SELECT OUTPUT REGISTER 13
U-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
—— RP27R5 RP27R4 RP27R3 RP27R2 RP27R1 RP27R0
bit 15 bit 8
U-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
—— RP26R5 RP26R4 RP26R3 RP26R2 RP26R1 RP26R0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-14 Unimplemented: Read as ‘0’
bit 13-8 RP27R<5:0>: RP27 Output Pin Mapping bits
Peripheral output number n is assigned to pin, RP27 (see Table 11-4 for peripheral function numbers).
bit 7-6 Unimplemented: Read as ‘0’
bit 5-0 RP26R<5:0>: RP26 Output Pin Mapping bits
Peripheral output number n is assigned to pin, RP26 (see Table 11-4 for peripheral function numbers).
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REGISTER 11-41: RPOR14: PERIPHERAL PIN SELECT OUTPUT REGISTER 14
U-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
—— RP29R5 RP29R4 RP29R3 RP29R2 RP29R1 RP29R0
bit 15 bit 8
U-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
—— RP28R5 RP28R4 RP28R3 RP28R2 RP28R1 RP28R0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-14 Unimplemented: Read as ‘0’
bit 13-8 RP29R<5:0>: RP29 Output Pin Mapping bits
Peripheral output number n is assigned to pin, RP29 (see Table 11-4 for peripheral function numbers).
bit 7-6 Unimplemented: Read as ‘0’
bit 5-0 RP28R<5:0>: RP28 Output Pin Mapping bits
Peripheral output number n is assigned to pin, RP28 (see Table 11-4 for peripheral function numbers).
REGISTER 11-42: RPOR15: PERIPHERAL PIN SELECT OUTPUT REGISTER 15
U-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
——RP31R5
(1)RP31R4(1)RP31R3(1)RP31R2(1)RP31R1(1)RP31R0(1)
bit 15 bit 8
U-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
—— RP30R5 RP30R4 RP30R3 RP30R2 RP30R1 RP30R0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-14 Unimplemented: Read as ‘0’
bit 13-8 RP31R<5:0>: RP31 Output Pin Mapping bits(1)
Peripheral output number n is assigned to pin, RP31 (see Table 11-4 for peripheral function numbers).
bit 7-6 Unimplemented: Read as ‘0’
bit 5-0 RP30R<5:0>: RP30 Output Pin Mapping bits
Peripheral output number n is assigned to pin, RP30 (see Table 11-4 for peripheral function numbers).
Note 1: These bits are unimplemented in 64-pin and 80-pin devices; read as ‘0’.
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NOTES:
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PIC24FJ128GA310 FAMILY
12.0 TIMER1
The Timer1 module is a 16-bit timer, which can serve
as the time counter for the Real-Time Clock (RTC) or
operate as a free-running, interval timer/counter.
Timer1 can operate in three modes:
•16-Bit Timer
• 16-Bit Synchronous Counter
• 16-Bit Asynchronous Counter
Timer1 also supports these features:
• Timer Gate Operation
• Selectable Prescaler Settings
• Timer Operation during CPU Idle and Sleep
modes
• Interrupt on 16-Bit Period Register Match or
Falling Edge of External Gate Signal
Figure 12-1 presents a block diagram of the 16-bit
timer module.
To configure Timer1 for operation:
1. Set the TON bit (= 1).
2. Select the timer prescaler ratio using the
TCKPS<1:0> bits.
3. Set the Clock and Gating modes using the TCS,
TECS and TGATE bits.
4. Set or clear the TSYNC bit to configure
synchronous or asynchronous operation.
5. Load the timer period value into the PR1
register.
6. If interrupts are required, set the interrupt enable
bit, T1IE. Use the priority bits, T1IP<2:0>, to set
the interrupt priority.
FIGURE 12-1: 16-BIT TIMER1 MODULE BLOCK DIAGRAM
Note: This data sheet summarizes the features of
this group of PIC24F devices. It is not
intended to be a comprehensive reference
source. For more information, refer to the
“PIC24F Family Reference Manual”,
Section 14. “Timers” (DS39704). The
information in this data sheet supersedes
the information in the FRM.
TON
Sync
SOSCI
SOSCO
PR1
Set T1IF
Equal
Comparator
TMR1
Reset
SOSCEN
1
0
TSYNC
Q
QD
CK
TCKPS<1:0>
2
TGATE
TCY
1
0
TCS
TGATE
Gate
Sync
SOSC
Input
Gate
Output
Clock
Output
to TMR1
Clock Input Select Detail
LPRC Input
2
T1ECS<1:0>
T1CK Input
SOSCSEL<1:0>
LPRC
Clock
Input Select
Prescaler
1, 8, 64, 256
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REGISTER 12-1: T1CON: TIMER1 CONTROL REGISTER(1)
R/W-0 U-0 R/W-0 U-0 U-0 U-0 R/W-0 R/W-0
TON —TSIDL— — — TIECS1 TIECS0
bit 15 bit 8
U-0 R/W-0 R/W-0 R/W-0 U-0 R/W-0 R/W-0 U-0
— TGATE TCKPS1 TCKPS0 — TSYNC TCS —
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 TON: Timer1 On bit
1 = Starts 16-bit Timer1
0 = Stops 16-bit Timer1
bit 14 Unimplemented: Read as ‘0’
bit 13 TSIDL: Stop in Idle Mode bit
1 = Discontinue module operation when device enters Idle mode
0 = Continue module operation in Idle mode
bit 12-10 Unimplemented: Read as ‘0’
bit 9-8 TIECS<1:0>: Timer1 Extended Clock Source Select bits (selected when TCS = 1)
11 = Unimplemented, do not use
10 = LPRC Oscillator
01 = T1CK external clock input
00 =SOSC
bit 7 Unimplemented: Read as ‘0’
bit 6 TGATE: Timer1 Gated Time Accumulation Enable bit
When TCS = 1:
This bit is ignored.
When TCS = 0:
1 = Gated time accumulation is enabled
0 = Gated time accumulation is disabled
bit 5-4 TCKPS<1:0>: Timer1 Input Clock Prescale Select bits
11 = 1:256
10 = 1:64
01 = 1:8
00 = 1:1
bit 3 Unimplemented: Read as ‘0’
bit 2 TSYNC: Timer1 External Clock Input Synchronization Select bit
When TCS = 1:
1 = Synchronize external clock input
0 = Do not synchronize external clock input
When TCS = 0:
This bit is ignored.
bit 1 TCS: Timer1 Clock Source Select bit
1 = Extended clock selected by the timer
0 = Internal clock (FOSC/2)
bit 0 Unimplemented: Read as ‘0’
Note 1: Changing the value of T1CON while the timer is running (TON = 1) causes the timer prescale counter to
reset and is not recommended.
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13.0 TIMER2/3 AND TIMER4/5
The Timer2/3 and Timer4/5 modules are 32-bit timers,
which can also be configured as four independent, 16-bit
timers with selectable operating modes.
As 32-bit timers, Timer2/3 and Timer4/5 can each
operate in three modes:
• Two independent 16-bit timers with all 16-bit
operating modes (except Asynchronous Counter
mode)
• Single 32-bit timer
• Single 32-bit synchronous counter
They also support these features:
• Timer Gate Operation
• Selectable Prescaler Settings
• Timer Operation during Idle and Sleep modes
• Interrupt on a 32-Bit Period Register Match
• A/D Event Trigger (only on Timer2/3 in 32-bit
mode and Timer3 in 16-bit mode)
Individually, all four of the 16-bit timers can function as
synchronous timers or counters. They also offer the
features listed above, except for the A/D Event Trigger.
This trigger is implemented only on Timer2/3 in 32-bit
mode and Timer3 in 16-bit mode. The operating modes
and enabled features are determined by setting the
appropriate bit(s) in the T2CON, T3CON, T4CON and
T5CON registers. T2CON and T4CON are shown in
generic form in Register 13-1; T3CON and T5CON are
shown in Register 13-2.
For 32-bit timer/counter operation, Timer2 and Timer4
are the least significant word; Timer3 and Timer4 are
the most significant word of the 32-bit timers.
To configure Timer2/3 or Timer4/5 for 32-bit operation:
1. Set the T32 or T45 bit (T2CON<3> or
T4CON<3> = 1).
2. Select the prescaler ratio for Timer2 or Timer4
using the TCKPS<1:0> bits.
3. Set the Clock and Gating modes using the TCS
and TGATE bits. If TCS is set to an external
clock, RPINRx (TxCK) must be configured to
an available RPn/RPIn pin. For more informa-
tion, see Section 11.4 “Peripheral Pin Select
(PPS)”.
4. Load the timer period value. PR3 (or PR5) will
contain the most significant word (msw) of the
value, while PR2 (or PR4) contains the least
significant word (lsw).
5. If interrupts are required, set the interrupt enable
bit, T3IE or T5IE. Use the priority bits, T3IP<2:0>
or T5IP<2:0>, to set the interrupt priority. Note
that while Timer2 or Timer4 controls the timer, the
interrupt appears as a Timer3 or Timer5 interrupt.
6. Set the TON bit (= 1).
The timer value, at any point, is stored in the register
pair, TMR<3:2> (or TMR<5:4>). TMR3 (TMR5) always
contains the most significant word of the count, while
TMR2 (TMR4) contains the least significant word.
To configure any of the timers for individual 16-bit
operation:
1. Clear the T32 bit corresponding to that timer
(T2CON<3> for Timer2 and Timer3 or
T4CON<3> for Timer4 and Timer5).
2. Select the timer prescaler ratio using the
TCKPS<1:0> bits.
3. Set the Clock and Gating modes using the TCS
and TGATE bits. See Sec tion 11.4 “Peripheral
Pin Select (PPS)” for more information.
4. Load the timer period value into the PRx register.
5. If interrupts are required, set the interrupt enable
bit, TxIE. Use the priority bits, TxIP<2:0>, to set
the interrupt priority.
6. Set the TON (TxCON<15> = 1) bit.
Note: This data sheet summarizes the features of
this group of PIC24F devices. It is not
intended to be a comprehensive reference
source. For more information, refer to the
“PIC24F Family Reference Manual”,
Section 14. “Timers” (DS39704). The
information in this data sheet supersedes
the information in the FRM.
Note: For 32-bit operation, T3CON and T5CON
control bits are ignored. Only T2CON and
T4CON control bits are used for setup and
control. Timer2 and Timer4 clock and gate
inputs are utilized for the 32-bit timer
modules, but an interrupt is generated
with the Timer3 or Timer5 interrupt flags.
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FIGURE 13-1: TIMER2/3 AND TIMER4/5 (32-BIT) BLOCK DIAGRAM
TMR3 TMR2
Set T3IF (T5IF)
Equal Comparator
PR3 PR2
Reset
LSB MSB
Note 1: The 32-Bit Timer Configuration bit, T32, must be set for 32-bit timer/counter operation. All control bits are
respective to the T2CON and T4CON registers.
2: The timer clock input must be assigned to an available RPn/RPIn pin before use. See Sect ion 11. 4 “Periphera l
Pin Select (PPS)” for more information.
3: The A/D event trigger is available only on Timer 2/3 in 32-bit mode and Timer 3 in 16-bit mode.
Data Bus<15:0>
TMR3HLD
Read TMR2 (TMR4)(1)
Write TMR2 (TMR4)(1)
16
16
16
Q
QD
CK
TGATE
0
1
TON
TCKPS<1:0>
Prescaler
1, 8, 64, 256
2
TCY
TCS(2)
TGATE(2)
Gate
T2CK
Sync
A/D Event Trigger(3)
Sync
(T4CK)
(PR5) (PR4)
(TMR5HLD)
(TMR5) (TMR4)
1x
01
00
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FIGURE 13-2: TIMER2 AND TIMER4 (16-BIT SYNCHRONOUS) BLOCK DIAGRAM
FIGURE 13-3: TIMER3 AND TIMER5 (16-BIT ASYNCHRONOUS) BLOCK DIAGRAM
TON
TCKPS<1:0>
Prescaler
1, 8, 64, 256
2
TCY TCS(1)
1x
01
TGATE(1)
00
Gate
T2CK
Sync
PR2 (PR4)
Set T2IF (T4IF)
Equal Comparator
Reset
Q
QD
CK
TGATE
1
0
(T4CK)
Sync
Note 1: The timer clock input must be assigned to an available RPn/RPIn pin before use. See Secti on 11.4 “Periphe r a l
Pin Select (PPS)” for more information.
TMR2 (TMR4)
TON
TCKPS<1:0>
2
TCY TCS(1)
1x
01
TGATE(1)
00
T3CK
PR3 (PR5)
Set T3IF (T5IF)
Equal Comparator
TMR3 (TMR5)
Reset
Q
QD
CK
TGATE
1
0
A/D Event Trigger(2)
(T5CK)
Prescaler
1, 8, 64, 256
Sync
Note 1: The timer clock input must be assigned to an available RPn/RPIn pin before use. See Section 11.4 “Peripheral
Pin Select (PPS)” for more information.
2: The A/D event trigger is available only on Timer3.
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REGISTER 13-1: TxCON: TIMER2 AND TIMER4 CONTROL REGISTER(3)
R/W-0 U-0 R/W-0 U-0 U-0 U-0 U-0 U-0
TON —TSIDL—————
bit 15 bit 8
U-0 R/W-0 R/W-0 R/W-0 R/W-0 U-0 R/W-0 U-0
— TGATE TCKPS1 TCKPS0 T32(1)—TCS
(2)—
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 TON: Timerx On bit
When TxCON<3> = 1:
1 = Starts 32-bit Timerx/y
0 = Stops 32-bit Timerx/y
When TxCON<3> = 0:
1 = Starts 16-bit Timerx
0 = Stops 16-bit Timerx
bit 14 Unimplemented: Read as ‘0’
bit 13 TSIDL: Stop in Idle Mode bit
1 = Discontinue module operation when device enters Idle mode
0 = Continue module operation in Idle mode
bit 12-7 Unimplemented: Read as ‘0’
bit 6 TGATE: Timerx Gated Time Accumulation Enable bit
When TCS = 1:
This bit is ignored.
When TCS = 0:
1 = Gated time accumulation is enabled
0 = Gated time accumulation is disabled
bit 5-4 TCKPS<1:0>: Timerx Input Clock Prescale Select bits
11 =1:256
10 =1:64
01 =1:8
00 =1:1
bit 3 T32: 32-Bit Timer Mode Select bit(1)
1 = Timerx and Timery form a single 32-bit timer
0 = Timerx and Timery act as two 16-bit timers
In 32-bit mode, T3CON control bits do not affect 32-bit timer operation.
bit 2 Unimplemented: Read as ‘0’
bit 1 TCS: Timerx Clock Source Select bit(2)
1 = External clock is from pin, TxCK (on the rising edge)
0 = Internal clock (FOSC/2)
bit 0 Unimplemented: Read as ‘0’
Note 1: In T4CON, the T45 bit is implemented instead of T32 to select 32-bit mode. In 32-bit mode, the T3CON or
T5CON control bits do not affect 32-bit timer operation.
2: If TCS = 1, RPINRx (TxCK) must be configured to an available RPn/RPIn pin. For more information, see
Section 11.4 “Peripheral Pin Select (PPS)”.
3: Changing the value of TxCON while the timer is running (TON = 1) causes the timer prescale counter to
reset and is not recommended.
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REGISTER 13-2: TyCON: TIMER3 AND TIMER5 CONTROL REGISTER(3)
R/W-0 U-0 R/W-0 U-0 U-0 U-0 U-0 U-0
TON(1)—TSIDL
(1)—————
bit 15 bit 8
U-0 R/W-0 R/W-0 R/W-0 U-0 U-0 R/W-0 U-0
—TGATE
(1)TCKPS1(1)TCKPS0(1)——TCS
(1,2)—
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 TON: Timery On bit(1)
1 = Starts 16-bit Timery
0 = Stops 16-bit Timery
bit 14 Unimplemented: Read as ‘0’
bit 13 TSIDL: Stop in Idle Mode bit(1)
1 = Discontinue module operation when device enters Idle mode
0 = Continue module operation in Idle mode
bit 12-7 Unimplemented: Read as ‘0’
bit 6 TGATE: Timery Gated Time Accumulation Enable bit(1)
When TCS = 1:
This bit is ignored.
When TCS = 0:
1 = Gated time accumulation is enabled
0 = Gated time accumulation is disabled
bit 5-4 TCKPS<1:0>: Timery Input Clock Prescale Select bits(1)
11 = 1:256
10 = 1:64
01 = 1:8
00 = 1:1
bit 3-2 Unimplemented: Read as ‘0’
bit 1 TCS: Timery Clock Source Select bit(1,2)
1 = External clock from pin, TyCK (on the rising edge)
0 = Internal clock (FOSC/2)
bit 0 Unimplemented: Read as ‘0’
Note 1: When 32-bit operation is enabled (T2CON<3> or T4CON<3> = 1), these bits have no effect on Timery
operation; all timer functions are set through T2CON and T4CON.
2: If TCS = 1, RPINRx (TxCK) must be configured to an available RPn/RPIn pin. See Section 1 1.4 “Peripheral
Pin Select (PPS)” for more information.
3: Changing the value of TyCON while the timer is running (TON = 1) causes the timer prescale counter to
reset and is not recommended.
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NOTES:
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PIC24FJ128GA310 FAMILY
14.0 INPUT CAPTURE WITH
DEDICATED TIMERS
Devices in the PIC24FJ128GA310 family contain
seven independent input capture modules. Each of the
modules offers a wide range of configuration and
operating options for capturing external pulse events
and generating interrupts.
Key features of the input capture module include:
• Hardware configurable for 32-bit operation in all
modes by cascading two adjacent modules
• Synchronous and Trigger modes of output
compare operation, with up to 30 user-selectable
sync/trigger sources available
• A 4-level FIFO buffer for capturing and holding
timer values for several events
• Configurable interrupt generation
• Up to 6 clock sources available for each module,
driving a separate internal 16-bit counter
The module is controlled through two registers:
ICxCON1 (Register 14-1) and ICxCON2 (Register 14-2).
A general block diagram of the module is shown in
Figure 14-1.
14.1 General Operating Modes
14.1.1 SYNCHRONOUS AND TRIGGER
MODES
When the input capture module operates in a
Free-Running mode, the internal 16-bit counter,
ICxTMR, counts up continuously, wrapping around
from FFFFh to 0000h on each overflow. Its period is
synchronized to the selected external clock source.
When a capture event occurs, the current 16-bit value
of the internal counter is written to the FIFO buffer.
In Synchronous mode, the module begins capturing
events on the ICx pin as soon as its selected clock
source is enabled. Whenever an event occurs on the
selected sync source, the internal counter is reset. In
Trigger mode, the module waits for a Sync event from
another internal module to occur before allowing the
internal counter to run.
Standard, free-running operation is selected by setting
the SYNCSEL bits (ICxCON2<4:0>) to ‘00000’ and
clearing the ICTRIG bit (ICxCON2<7>). Synchronous
and Trigger modes are selected any time the
SYNCSEL bits are set to any value except ‘00000’.
The ICTRIG bit selects either Synchronous or Trigger
mode; setting the bit selects Trigger mode operation. In
both modes, the SYNCSEL bits determine the
sync/trigger source.
When the SYNCSEL bits are set to ‘00000’ and
ICTRIG is set, the module operates in Software Trigger
mode. In this case, capture operations are started by
manually setting the TRIGSTAT bit (ICxCON2<6>).
FIGURE 14-1: INPUT CAPTURE BLOCK DIAGRAM
Note: This data sheet summarizes the features of
this group of PIC24F devices. It is not
intended to be a comprehensive reference
source. For more information, refer to the
“PIC24F Family Reference Manual”,
Section 34. “Input Capture with
Dedicated Timer” (DS39722). The infor-
mation in this data sheet supersedes the
information in the FRM.
Note 1: The ICx inputs must be assigned to an available RPn/RPIn pin before use. See Section 11.4 “Peripheral Pin Select
(PPS)” for more information.
ICXBUF
4-Level FIFO Buffer
ICX Pin(1)
ICM<2:0>
Set ICXIF
Edge Detect Logic
ICI1<:0>
ICOV, ICBNE
Interrupt
Logic
System Bus
Prescaler
Counter
1:1/4/16
and
Clock Synchronizer
Event and
Clock
Select
IC Clock
Sources
Sync and
ICTSEL<2:0>
SYNCSEL<4:0>
Trigger
16
16
16
Increment
Reset
Sync and
Trigger
Logic
Trigger Sources
ICXTMR
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14.1.2 CASCADED (32-BIT) MODE
By default, each module operates independently with
its own 16-bit timer. To increase resolution, adjacent
even and odd modules can be configured to function as
a single 32-bit module. (For example, Modules 1 and 2
are paired, as are Modules 3 and 4, and so on.) The
odd numbered module (ICx) provides the Least Signif-
icant 16 bits of the 32-bit register pairs and the even
module (ICy) provides the Most Significant 16 bits.
Wrap-arounds of the ICx registers cause an increment
of their corresponding ICy registers.
Cascaded operation is configured in hardware by
setting the IC32 bits (ICxCON2<8>) for both modules.
14.2 Capture Operations
The input capture module can be configured to capture
timer values and generate interrupts on rising edges on
ICx or all transitions on ICx. Captures can be config-
ured to occur on all rising edges or just some (every 4th
or 16th). Interrupts can be independently configured to
generate on each event or a subset of events.
To set up the module for capture operations:
1. Configure the ICx input for one of the available
Peripheral Pin Select pins.
2. If Synchronous mode is to be used, disable the
sync source before proceeding.
3. Make sure that any previous data has been
removed from the FIFO by reading ICxBUF until
the ICBNE bit (ICxCON1<3>) is cleared.
4. Set the SYNCSEL bits (ICxCON2<4:0>) to the
desired sync/trigger source.
5. Set the ICTSEL bits (ICxCON1<12:10>) for the
desired clock source.
6. Set the ICI bits (ICxCON1<6:5>) to the desired
interrupt frequency
7. Select Synchronous or Trigger mode operation:
a) Check that the SYNCSEL bits are not set to
‘00000’.
b) For Synchronous mode, clear the ICTRIG
bit (ICxCON2<7>).
c) For Trigger mode, set ICTRIG, and clear the
TRIGSTAT bit (ICxCON2<6>).
8. Set the ICM bits (ICxCON1<2:0>) to the desired
operational mode.
9. Enable the selected sync/trigger source.
For 32-bit cascaded operations, the setup procedure is
slightly different:
1. Set the IC32 bits for both modules
(ICyCON2<8>) and (ICxCON2<8>), enabling
the even numbered module first. This ensures
the modules will start functioning in unison.
2. Set the ICTSEL and SYNCSEL bits for both
modules to select the same sync/trigger and
time base source. Set the even module first,
then the odd module. Both modules must use
the same ICTSEL and SYNCSEL bits settings.
3. Clear the ICTRIG bit of the even module
(ICyCON2<7>). This forces the module to run in
Synchronous mode with the odd module,
regardless of its trigger setting.
4. Use the odd module’s ICI bits (ICxCON1<6:5>)
to set the desired interrupt frequency.
5. Use the ICTRIG bit of the odd module
(ICxCON2<7>) to configure Trigger or
Synchronous mode operation.
6. Use the ICM bits of the odd module
(ICxCON1<2:0>) to set the desired Capture
mode.
The module is ready to capture events when the time
base and the sync/trigger source are enabled. When
the ICBNE bit (ICxCON1<3>) becomes set, at least
one capture value is available in the FIFO. Read input
capture values from the FIFO until the ICBNE clears
to ‘0’.
For 32-bit operation, read both the ICxBUF and
ICyBUF for the full 32-bit timer value (ICxBUF for the
lsw, ICyBUF for the msw). At least one capture value is
available in the FIFO buffer when the odd module’s
ICBNE bit (ICxCON1<3>) becomes set. Continue to
read the buffer registers until ICBNE is cleared
(performed automatically by hardware).
Note: For Synchronous mode operation, enable
the sync source as the last step. Both
input capture modules are held in Reset
until the sync source is enabled.
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REGISTER 14-1: ICxCON1: INPUT CAPTURE x CONTROL REGISTER 1
U-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 U-0 U-0
—— ICSIDL ICTSEL2 ICTSEL1 ICTSEL0 — —
bit 15 bit 8
U-0 R/W-0 R/W-0 R-0, HSC R-0, HSC R/W-0 R/W-0 R/W-0
— ICI1 ICI0 ICOV ICBNE ICM2(1)ICM1(1)ICM0(1)
bit 7 bit 0
Legend: HSC = Hardware Settable/Clearable bit
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-14 Unimplemented: Read as ‘0’
bit 13 ICSIDL: Input Capture x Module Stop in Idle Control bit
1 = Input capture module Halts in CPU Idle mode
0 = Input capture module continues to operate in CPU Idle mode
bit 12-10 ICTSEL<2:0>: Input Capture Timer Select bits
111 = System clock (FOSC/2)
110 = Reserved
101 = Reserved
100 = Timer1
011 = Timer5
010 = Timer4
001 = Timer2
000 = Timer3
bit 9-7 Unimplemented: Read as ‘0’
bit 6-5 ICI<1:0>: Select Number of Captures per Interrupt bits
11 = Interrupt on every fourth capture event
10 = Interrupt on every third capture event
01 = Interrupt on every second capture event
00 = Interrupt on every capture event
bit 4 ICOV: Input Capture x Overflow Status Flag bit (read-only)
1 = Input capture overflow has occurred
0 = No input capture overflow has occurred
bit 3 ICBNE: Input Capture x Buffer Empty Status bit (read-only)
1 = Input capture buffer is not empty, at least one more capture value can be read
0 = Input capture buffer is empty
bit 2-0 ICM<2:0>: Input Capture Mode Select bits(1)
111 = Interrupt mode: input capture functions as an interrupt pin only when the device is in Sleep or
Idle mode (rising edge detect only, all other control bits are not applicable)
110 = Unused (module is disabled)
101 = Prescaler Capture mode: capture on every 16th rising edge
100 = Prescaler Capture mode: capture on every 4th rising edge
011 = Simple Capture mode: capture on every rising edge
010 = Simple Capture mode: capture on every falling edge
001 = Edge Detect Capture mode: capture on every edge (rising and falling); ICI<1:0> bits do not
control interrupt generation for this mode
000 = Input capture module is turned off
Note 1: The ICx input must also be configured to an available RPn/RPIn pin. For more information, see
Section 11.4 “Peripheral Pin Select (PPS)”.
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REGISTER 14-2: ICxCON2: INPUT CAPTURE x CONTROL REGISTER 2
U-0 U-0 U-0 U-0 U-0 U-0 U-0 R/W-0
— — — — — — —IC32
bit 15 bit 8
R/W-0 R/W-0 HS U-0 R/W-0 R/W-1 R/W-1 R/W-0 R/W-1
ICTRIG TRIGSTAT — SYNCSEL4 SYNCSEL3 SYNCSEL2 SYNCSEL1 SYNCSEL0
bit 7 bit 0
Legend: HS = Hardware Settable bit
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-9 Unimplemented: Read as ‘0’
bit 8 IC32: Cascade Two IC Modules Enable bit (32-bit operation)
1 = ICx and ICy operate in cascade as a 32-bit module (this bit must be set in both modules)
0 = ICx functions independently as a 16-bit module
bit 7 ICTRIG: ICx Sync/Trigger Select bit
1 = Trigger ICx from the source designated by the SYNCSELx bits
0 = Synchronize ICx with the source designated by the SYNCSELx bits
bit 6 TRIGSTAT: Timer Trigger Status bit
1 = Timer source has been triggered and is running (set in hardware, can be set in software)
0 = Timer source has not been triggered and is being held clear
bit 5 Unimplemented: Read as ‘0’
Note 1: Use these inputs as trigger sources only and never as sync sources.
2: Never use an IC module as its own trigger source, by selecting this mode.
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bit 4-0 SYNCSEL<4:0>: Synchronization/Trigger Source Selection bits
11111 = Reserved
11110 = Reserved
(2)
11101 = Reserved
(2)
11100 = CTMU
(1)
11011 = A/D
(1)
11010 = Comparator 3(1)
11001 = Comparator 2(1)
11000 = Comparator 1(1)
10111 = Reserved
(2)
10110 = Input Capture 7(2)
10101 = Input Capture 6(2)
10100 = Input Capture 5(2)
10011 = Input Capture 4(2)
10010 = Input Capture 3(2)
10001 = Input Capture 2(2)
10000 = Input Capture 1(2)
01111 = Timer5
01110 = Timer4
01101 = Timer3
01100 = Timer2
01011 = Timer1
01010 = Reserved
01001 = Reserved
01000 = Reserved
00111 = Output Compare 7
•
•
•
00010 = Output Compare 2
00001 = Output Compare 1
00000 = Not synchronized to any other module
REGISTER 14-2: ICxCON2: INPUT CAPTURE x CONTROL REGISTER 2 (CONTINUED)
Note 1: Use these inputs as trigger sources only and never as sync sources.
2: Never use an IC module as its own trigger source, by selecting this mode.
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NOTES:
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PIC24FJ128GA310 FAMILY
15.0 OUTPUT COMPARE WITH
DEDICATED TIMERS
Devices in the PIC24FJ128GA310 family all feature
seven independent output compare modules. Each of
these modules offers a wide range of configuration and
operating options for generating pulse trains on internal
device events, and can produce pulse-width modulated
waveforms for driving power applications.
Key features of the output compare module include:
• Hardware configurable for 32-bit operation in all
modes by cascading two adjacent modules
• Synchronous and Trigger modes of output
compare operation, with up to 31 user-selectable
trigger/sync sources available
• Two separate Period registers (a main register,
OCxR, and a secondary register, OCxRS) for
greater flexibility in generating pulses of varying
widths
• Configurable for single pulse or continuous pulse
generation on an output event, or continuous
PWM waveform generation
• Up to 6 clock sources available for each module,
driving a separate internal 16-bit counter
15.1 General Operating Modes
15.1.1 SYNCHRONOUS AND TRIGGER
MODES
When the output compare module operates in a
Free-Running mode, the internal 16-bit counter,
OCxTMR, runs counts up continuously, wrapping
around from 0xFFFF to 0x0000 on each overflow. Its
period is synchronized to the selected external clock
source. Compare or PWM events are generated each
time a match between the internal counter and one of
the Period registers occurs.
In Synchronous mode, the module begins performing
its compare or PWM operation as soon as its selected
clock source is enabled. Whenever an event occurs on
the selected sync source, the module’s internal counter
is reset. In Trigger mode, the module waits for a sync
event from another internal module to occur before
allowing the counter to run.
Free-Running mode is selected by default or any time
that the SYNCSEL bits (OCxCON2<4:0>) are set to
‘00000’. Synchronous or Trigger modes are selected
any time the SYNCSEL bits are set to any value except
‘00000’. The OCTRIG bit (OCxCON2<7>) selects
either Synchronous or Trigger mode; setting the bit
selects Trigger mode operation. In both modes, the
SYNCSEL bits determine the sync/trigger source.
15.1.2 CASCADED (32-BIT) MODE
By default, each module operates independently with
its own set of 16-Bit Timer and Duty Cycle registers. To
increase resolution, adjacent even and odd modules
can be configured to function as a single 32-bit module.
(For example, Modules 1 and 2 are paired, as are
Modules 3 and 4, and so on.) The odd numbered
module (OCx) provides the Least Significant 16 bits of
the 32-bit register pairs and the even module (OCy)
provides the Most Significant 16 bits. Wrap-arounds of
the OCx registers cause an increment of their
corresponding OCy registers.
Cascaded operation is configured in hardware by set-
ting the OC32 bit (OCxCON2<8>) for both modules.
For more details on cascading, refer to the “PIC24F
Family Reference Manual”, Section 35. “Output
Compare with Dedicated Timer” (DS39723).
Note: This data sheet summarizes the features of
this group of PIC24F devices. It is not
intended to be a comprehensive reference
source. For more information, refer to the
“PIC24F Family Reference Manual”,
Section 35. “Output Compare with
Dedicated Timer” (DS39723). The infor-
mation in this data sheet supersedes the
information in the FRM.
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DS39996F-page 212 2010-2011 Microchip Technology Inc.
FIGURE 15-1: OUTPUT COMPARE BLOCK DIAGRAM (16-BIT MODE)
15.2 Compare Operations
In Compare mode (Figure 15-1), the output compare
module can be configured for single-shot or continuous
pulse generation. It can also repeatedly toggle an
output pin on each timer event.
To set up the module for compare operations:
1. Configure the OCx output for one of the
available Peripheral Pin Select pins.
2. Calculate the required values for the OCxR and
(for Double Compare modes) OCxRS Duty
Cycle registers:
a) Determine the instruction clock cycle time.
Take into account the frequency of the
external clock to the timer source (if one is
used) and the timer prescaler settings.
b) Calculate time to the rising edge of the
output pulse relative to the timer start value
(0000h).
c) Calculate the time to the falling edge of the
pulse based on the desired pulse width and
the time to the rising edge of the pulse.
3. Write the rising edge value to OCxR and the
falling edge value to OCxRS.
4. Set the Timer Period register, PRy, to a value
equal to or greater than the value in OCxRS.
5. Set the OCM<2:0> bits for the appropriate
compare operation (= 0xx).
6. For Trigger mode operations, set OCTRIG to
enable Trigger mode. Set or clear TRIGMODE
to configure trigger operation and TRIGSTAT to
select a hardware or software trigger. For
Synchronous mode, clear OCTRIG.
7. Set the SYNCSEL<4:0> bits to configure the
trigger or synchronization source. If free-running
timer operation is required, set the SYNCSEL
bits to ‘00000’ (no sync/trigger source).
8. Select the time base source with the
OCTSEL<2:0> bits. If necessary, set the TON
bits for the selected timer, which enables the
compare time base to count. Synchronous
mode operation starts as soon as the time base
is enabled; Trigger mode operation starts after a
trigger source event occurs.
OCxR and
Comparator
OCxTMR
OCxCON1
OCxCON2
OCx Interrupt
OCx Pin(1)
OCxRS
Comparator
Match Event
Match Event
Trigger and
Sync Logic
Clock
Select
Increment
Reset
OC Clock
Sources
Trigger and
Sync Sources
Reset
Match Event
OCFA/OCFB(2)
OCTSELx
SYNCSELx
TRIGSTAT
TRIGMODE
OCTRIG
OCMx
OCINV
OCTRIS
FLTOUT
FLTTRIEN
FLTMD
ENFLT<2:0>
OCFLT<2:0>
Note 1: The OCx outputs must be assigned to an available RPn pin before use. See Section 11.4 “Peripheral Pin S elect
(PPS)” for more information.
2: The OCFA/OCFB Fault inputs must be assigned to an available RPn/RPIn pin before use. See Section 11.4
“Per ipheral Pin Select (PPS)” for more information.
DCB<1:0>
DCB<1:0>
OC Output and
Fault Logic
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For 32-bit cascaded operation, these steps are also
necessary:
1. Set the OC32 bits for both registers
(OCyCON2<8>) and (OCxCON2<8>). Enable
the even numbered module first to ensure the
modules will start functioning in unison.
2. Clear the OCTRIG bit of the even module
(OCyCON2<7>), so the module will run in
Synchronous mode.
3. Configure the desired output and Fault settings
for OCy.
4. Force the output pin for OCx to the output state
by clearing the OCTRIS bit.
5. If Trigger mode operation is required, configure
the trigger options in OCx by using the OCTRIG
(OCxCON2<7>), TRIGMODE (OCxCON1<3>)
and SYNCSEL (OCxCON2<4:0>) bits.
6. Configure the desired Compare or PWM mode
of operation (OCM<2:0>) for OCy first, then for
OCx.
Depending on the output mode selected, the module
holds the OCx pin in its default state and forces a tran-
sition to the opposite state when OCxR matches the
timer. In Double Compare modes, OCx is forced back
to its default state when a match with OCxRS occurs.
The OCxIF interrupt flag is set after an OCxR match in
Single Compare modes and after each OCxRS match
in Double Compare modes.
Single-shot pulse events only occur once, but may be
repeated by simply rewriting the value of the
OCxCON1 register. Continuous pulse events continue
indefinitely until terminated.
15.3 Pulse-Width Modulation (PWM)
Mode
In PWM mode, the output compare module can be
configured for edge-aligned or center-aligned pulse
waveform generation. All PWM operations are
double-buffered (buffer registers are internal to the
module and are not mapped into SFR space).
To configure the output compare module for PWM
operation:
1. Configure the OCx output for one of the
available Peripheral Pin Select pins.
2. Calculate the desired duty cycles and load them
into the OCxR register.
3. Calculate the desired period and load it into the
OCxRS register.
4. Select the current OCx as the synchronization
source by writing 0x1F to the SYNCSEL<4:0>
bits (OCxCON2<4:0>) and ‘0’ to the OCTRIG bit
(OCxCON2<7>).
5. Select a clock source by writing to the
OCTSEL<2:0> bits (OCxCON<12:10>).
6. Enable interrupts, if required, for the timer and
output compare modules. The output compare
interrupt is required for PWM Fault pin
utilization.
7. Select the desired PWM mode in the OCM<2:0>
bits (OCxCON1<2:0>).
8. Appropriate Fault inputs may be enabled by
using the ENFLT<2:0> bits as described in
Register 15-1.
9. If a timer is selected as a clock source, set the
selected timer prescale value. The selected
timer’s prescaler output is used as the clock
input for the OCx timer, and not the selected
timer output.
Note: This peripheral contains input and output
functions that may need to be configured
by the Peripheral Pin Select. See
Section 11.4 “Peripheral Pin Select
(PPS)” for more information.
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FIGURE 15-2: OUTPUT COMPARE BLOCK DIAGRA M ( DOUB LE-BUFFERED, 16-BIT PWM MODE)
15.3.1 PWM PERIOD
The PWM period is specified by writing to PRy, the
Timer Period register. The PWM period can be
calculated using Equation 15-1.
EQUATION 15-1: CALCULATING THE PWM PERIOD(1)
Comparator
OCxTMR
OCxCON1
OCxCON2
OCx Interrupt
OCx Pin(1)
OCxRS Buffer
Comparator
Match
Match
Trigger and
Sync Logic
Clock
Select
Increment
Reset
OC Clock
Sources
Trigger and
Sync Sources
Reset
Match Event
OCFA/OCFB(2)
OCTSELx
SYNCSELx
TRIGSTAT
TRIGMODE
OCTRIG
OCMx
OCINV
OCTRIS
FLTOUT
FLTTRIEN
FLTMD
ENFLT<2:0>
OCFLT<2:0>
OCxRS
Event
Event
Rollover
Rollover/Reset
Rollover/Reset
Note 1: The OCx outputs must be assigned to an available RPn pin before use. See S ection 11.4 “Peripheral Pin Select
(PPS)” for more information.
2: The OCFA/OCFB Fault inputs must be assigned to an available RPn/RPIn pin before use. See Section 11.4
“Peripher a l Pin Select (PPS)” for more information.
OCxR and
DCB<1:0>
DCB<1:0>
OCxR and
DCB<1:0> Buffers
OC Output and
Fault Logic
Note 1: Based on TCY = TOSC * 2; Doze mode and PLL are disabled.
PWM Period = [(PRy) + 1 • TCY • (Timer Prescale Value)
where:
PWM Frequency = 1/[PWM P eriod]
Note: A PRy value of N will produce a PWM period of N + 1 time base count cycles. For example, a value of
7, written into the PRy register, will yield a period consisting of 8 time base cycles.
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15.3.2 PWM DUTY CYCLE
The PWM duty cycle is specified by writing to the
OCxRS and OCxR registers. The OCxRS and OCxR
registers can be written to at any time, but the duty
cycle value is not latched until a match between PRy
and TMRy occurs (i.e., the period is complete). This
provides a double buffer for the PWM duty cycle and is
essential for glitchless PWM operation.
Some important boundary parameters of the PWM duty
cycle include:
• If OCxR, OCxRS, and PRy are all loaded with
0000h, the OCx pin will remain low (0% duty
cycle).
• If OCxRS is greater than PRy, the pin will remain
high (100% duty cycle).
See Example 15-1 for PWM mode timing details.
Ta b l e 1 5 - 1 and Table 15-2 show example PWM
frequencies and resolutions for a device operating at
4 MIPS and 10 MIPS, respectively.
EQUATION 15-2: CALCULATION FOR MAXIMUM PWM RESOLUTION(1)
EXAMPLE 15-1: PW M PERIOD AND DUTY CYCLE CALCULATIONS(1)
Note 1: Based on FCY = FOSC/2; Doze mode and PLL are disabled.
Maximu m PWM Resolutio n (bits) =
log10
log10(2)
FPWM • (Timer Prescale Value) bits
FCY
()
1. Find the Timer Period register value for a desired PWM frequency of 52.08 kHz, where FOSC = 8 MHz with PLL
(32 MHz device clock rate) and a Timer2 prescaler setting of 1:1.
TCY = 2 * TOSC = 62.5 ns
PWM P e riod = 1/PWM Fr equency = 1/52.08 kHz = 19.2 ms
PWM Period = (PR2 + 1) • TCY • (Timer2 Prescale Valu e)
19.2 ms = PR2 + 1) • 62.5 ns • 1
PR2 = 306
2. Find the maximum resolution of the duty cycle that can be used with a 52.08 kHz frequency and a 32 MHz
device clock rate:
PWM Resolution = log10(FCY/FPWM)/log102) bits
= (log10(1 6 MH z/52.08 kHz)/log102) bit s
= 8.3 bits
Note 1: Based on TCY = 2 * TOSC; Doze mode and PLL are disabled.
TABLE 15-1: EXAMPLE PWM FREQUENCIES AND RESOLUTIONS AT 4 MIPS (FCY = 4 MHz)(1)
PWM Frequency 7.6 Hz 61 Hz 122 Hz 977 Hz 3.9 kHz 31.3 kHz 125 kHz
Timer Prescaler Ratio 8111111
Period Register Value FFFFh FFFFh 7FFFh 0FFFh 03FFh 007Fh 001Fh
Resolution (bits) 16 16 15 12 10 7 5
Note 1: Based on FCY = FOSC/2; Doze mode and PLL are disabled.
TABLE 15-2: EXAMPLE PWM FREQUENCIES AND RESOLUTIONS AT 16 MIPS (FCY = 16 M Hz)(1)
PWM Frequency 30.5 Hz 244 Hz 488 Hz 3.9 kHz 15.6 kHz 125 kHz 500 kHz
Timer Prescaler Ratio 8111111
Period Register Value FFFFh FFFFh 7FFFh 0FFFh 03FFh 007Fh 001Fh
Resolution (bits) 16 16 15 12 10 7 5
Note 1: Based on FCY = FOSC/2; Doze mode and PLL are disabled.
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REGISTER 15-1: OCxCON1: OUTPUT COMPARE x CONTROL REGISTER 1
U-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
—— OCSIDL OCTSEL2 OCTSEL1 OCTSEL0 ENFLT2(2)ENFLT1(2)
bit 15 bit 8
R/W-0 R/W-0, HSC R/W-0, HSC R/W-0, HSC R/W-0 R/W-0 R/W-0 R/W-0
ENFLT0(2)OCFLT2(2,3)OCFLT1(2,4)OCFLT0(2,4)TRIGMODE OCM2(1)OCM1(1)OCM0(1)
bit 7 bit 0
Legend: HSC = Hardware Settable/Clearable bit
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-14 Unimplemented: Read as ‘0’
bit 13 OCSIDL: Stop Output Compare x in Idle Mode Control bit
1 = Output Compare x Halts in CPU Idle mode
0 = Output Compare x continues to operate in CPU Idle mode
bit 12-10 OCTSEL<2:0>: Output Compare x Timer Select bits
111 = Peripheral clock (FCY)
110 = Reserved
101 = Reserved
100 = Timer1 clock (only synchronous clock is supported)
011 = Timer5 clock
010 = Timer4 clock
001 = Timer3 clock
000 = Timer2 clock
bit 9 ENFLT2: Fault Input 2 Enable bit(2)
1 = Fault 2 (Comparator 1/2/3 out) is enabled(3)
0 = Fault 2 is disabled
bit 8 ENFLT1: Fault Input 1 Enable bit(2)
1 = Fault 1 (OCFB pin) is enabled(4)
0 = Fault 1 is disabled
bit 7 ENFLT0: Fault Input 0 Enable bit(2)
1 = Fault 0 (OCFA pin) is enabled(4)
0 = Fault 0 is disabled
bit 6 OCFLT2: PWM Fault 2 (Comparator 1/2/3) Condition Status bit(2,3)
1 = PWM Fault 2 has occurred
0 = No PWM Fault 2 has occurred
bit 5 OCFLT1: PWM Fault 1 (OCFB pin) Condition Status bit(2,4)
1 = PWM Fault 1 has occurred
0 = No PWM Fault 1 has occurred
Note 1: The OCx output must also be configured to an available RPn pin. For more information, see Section 11.4
“Peripheral Pin Select (PPS)”.
2: The Fault input enable and Fault status bits are valid when OCM<2:0> = 111 or 110.
3: The Comparator 1 output controls the OC1-OC3 channels; Comparator 2 output controls the OC4-OC6
channels; Comparator 3 output controls the OC7-OC9 channels.
4: The OCFA/OCFB Fault input must also be configured to an available RPn/RPIn pin. For more information,
see Section 11.4 “Peripheral Pin Select (PPS)”.
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bit 4 OCFLT0: PWM Fault 0 (OCFA pin) Condition Status bit(2,4)
1 = PWM Fault 0 has occurred
0 = No PWM Fault 0 has occurred
bit 3 TRIGMODE: Trigger Status Mode Select bit
1 = TRIGSTAT (OCxCON2<6>) is cleared when OCxRS = OCxTMR or in software
0 = TRIGSTAT is only cleared by software
bit 2-0 OCM<2:0>: Output Compare x Mode Select bits(1)
111 = Center-Aligned PWM mode on OCx(2)
110 = Edge-Aligned PWM mode on OCx(2)
101 = Double Compare Continuous Pulse mode: Initialize the OCx pin low; toggle the OCx state
continuously on alternate matches of OCxR and OCxRS
100 = Double Compare Single-Shot mode: Initialize the OCx pin low; toggle the OCx state on matches
of OCxR and OCxRS for one cycle
011 = Single Compare Continuous Pulse mode: Compare events continuously toggle the OCx pin
010 = Single Compare Single-Shot mode: Initialize OCx pin high; compare event forces the OCx pin low
001 = Single Compare Single-Shot mode: Initialize OCx pin low; compare event forces the OCx pin high
000 = Output compare channel is disabled
REGISTER 15-1: OCxCON1: OUTPUT COMPARE x CONTROL REGISTER 1 (CONTINUED)
Note 1: The OCx output must also be configured to an available RPn pin. For more information, see Section 11.4
“Peripheral Pin Select (PPS)”.
2: The Fault input enable and Fault status bits are valid when OCM<2:0> = 111 or 110.
3: The Comparator 1 output controls the OC1-OC3 channels; Comparator 2 output controls the OC4-OC6
channels; Comparator 3 output controls the OC7-OC9 channels.
4: The OCFA/OCFB Fault input must also be configured to an available RPn/RPIn pin. For more information,
see Section 11.4 “Peripheral Pin Select (PPS)”.
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REGISTER 15-2: OCxCON2: OUTPUT COMPARE x CONTROL REGISTER 2
R/W-0 R/W-0 R/W-0 R/W-0 U-0 R/W-0 R/W-0 R/W-0
FLTMD FLTOUT FLTTRIEN OCINV —DCB1(3)DCB0(3)OC32
bit 15 bit 8
R/W-0 R/W-0 HS R/W-0 R/W-0 R/W-1 R/W-1 R/W-0 R/W-0
OCTRIG TRIGSTAT OCTRIS SYNCSEL4 SYNCSEL3 SYNCSEL2 SYNCSEL1 SYNCSEL0
bit 7 bit 0
Legend: HS = Hardware Settable bit
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 FLTMD: Fault Mode Select bit
1 = Fault mode is maintained until the Fault source is removed and the corresponding OCFLT0 bit is
cleared in software
0 = Fault mode is maintained until the Fault source is removed and a new PWM period starts
bit 14 FLTOUT: Fault Out bit
1 = PWM output is driven high on a Fault
0 = PWM output is driven low on a Fault
bit 13 FLTTRIEN: Fault Output State Select bit
1 = Pin is forced to an output on a Fault condition
0 = Pin I/O condition is unaffected by a Fault
bit 12 OCINV: OCMP Invert bit
1 = OCx output is inverted
0 = OCx output is not inverted
bit 11 Unimplemented: Read as ‘0’
bit 10-9 DCB<11:0>: PWM Duty Cycle Least Significant bits(3)
11 = Delay OCx falling edge by ¾ of the instruction cycle
10 = Delay OCx falling edge by ½ of the instruction cycle
01 = Delay OCx falling edge by ¼ of the instruction cycle
00 = OCx falling edge occurs at the start of the instruction cycle
bit 8 OC32: Cascade Two OC Modules Enable bit (32-bit operation)
1 = Cascade module operation is enabled
0 = Cascade module operation is disabled
bit 7 OCTRIG: OCx Trigger/Sync Select bit
1 = Trigger OCx from the source designated by the SYNCSELx bits
0 = Synchronize OCx with the source designated by the SYNCSELx bits
bit 6 TRIGSTAT: Timer Trigger Status bit
1 = Timer source has been triggered and is running
0 = Timer source has not been triggered and is being held clear
bit 5 OCTRIS: OCx Output Pin Direction Select bit
1 = OCx pin is tri-stated
0 = Output compare peripheral x is connected to an OCx pin
Note 1: Never use an OC module as its own trigger source, either by selecting this mode or another equivalent
SYNCSELx setting.
2: Use these inputs as trigger sources only and never as sync sources.
3: The DCB<1:0> bits are double-buffered in the PWM modes only (OCM<2:0> (OCxCON1<2:0>) = 111, 110).
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bit 4-0 SYNCSEL<4:0>: Trigger/Synchronization Source Selection bits
11111 = This OC module(1)
11110 = Input Capture 9(2)
11101 = Input Capture 6(2)
11100 = CTMU(2)
11011 = A/D(2)
11010 = Comparator 3(2)
11001 = Comparator 2(2)
11000 = Comparator 1(2)
10111 = Input Capture 4(2)
10110 = Input Capture 3(2)
10101 = Input Capture 2(2)
10100 = Input Capture 1(2)
10011 = Input Capture 8(2)
10010 = Input Capture 7(2)
1000x = Reserved
01111 = Timer5
01110 = Timer4
01101 = Timer3
01100 = Timer2
01011 = Timer1
01010 = Input Capture 5(2)
01001 = Output Compare 9(1)
01000 = Output Compare 8(1)
00111 = Output Compare 7(1)
00110 = Output Compare 6(1)
00101 = Output Compare 5(1)
00100 = Output Compare 4(1)
00011 = Output Compare 3(1)
00010 = Output Compare 2(1)
00001 = Output Compare 1(1)
00000 = Not synchronized to any other module
REGISTER 15-2: OCxCON2: OUTPUT COMPARE x CONTROL REGISTER 2 (CONTINUED)
Note 1: Never use an OC module as its own trigger source, either by selecting this mode or another equivalent
SYNCSELx setting.
2: Use these inputs as trigger sources only and never as sync sources.
3: The DCB<1:0> bits are double-buffered in the PWM modes only (OCM<2:0> (OCxCON1<2:0>) = 111, 110).
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NOTES:
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16.0 SERIAL PERIPHERAL
INTERFACE (SPI)
The Serial Peripheral Interface (SPI) module is a
synchronous serial interface useful for communicating
with other peripheral or microcontroller devices. These
peripheral devices may be serial EEPROMs, shift
registers, display drivers, A/D Converters, etc. The SPI
module is compatible with the SPI and SIOP Motorola®
interfaces. All devices of the PIC24FJ128GA310 family
include two SPI modules.
The module supports operation in two buffer modes. In
Standard mode, data is shifted through a single serial
buffer. In Enhanced Buffer mode, data is shifted
through an 8-level FIFO buffer.
The module also supports a basic framed SPI protocol
while operating in either Master or Slave mode. A total
of four framed SPI configurations are supported.
The SPI serial interface consists of four pins:
• SDIx: Serial Data Input
• SDOx: Serial Data Output
• SCKx: Shift Clock Input or Output
• SSx: Active-Low Slave Select or Frame
Synchronization I/O Pulse
The SPI module can be configured to operate using 2,
3 or 4 pins. In the 3-pin mode, SSx is not used. In the
2-pin mode, both SDOx and SSx are not used.
Block diagrams of the module in Standard and
Enhanced modes are shown in Figure 16-1 and
Figure 16-2.
Note: This data sheet summarizes the features of
this group of PIC24F devices. It is not
intended to be a comprehensive reference
source. For more information, refer to the
“PIC24F Family Reference Manual”,
Section 23. “Serial Peripheral Interface
(SPI)” (DS39699). The information in this
data sheet supersedes the information in
the FRM.
Note: Do not perform read-modify-write opera-
tions (such as bit-oriented instructions) on
the SPIxBUF register in either Standard or
Enhanced Buffer mode.
Note: In this section, the SPI modules are
referred to together as SPIx or separately
as SPI1, SPI2 or SPI3. Special Function
Registers will follow a similar notation. For
example, SPIxCON1 and SPIxCON2
refer to the control registers for any of the
3 SPI modules.
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To set up the SPI module for the Standard Master mode
of operation:
1. If using interrupts:
a) Clear the SPIxIF bit in the respective IFS
register.
b) Set the SPIxIE bit in the respective IEC
register.
c) Write the SPIxIP bits in the respective IPC
register to set the interrupt priority.
2. Write the desired settings to the SPIxCON1
and SPIxCON2 registers with MSTEN
(SPIxCON1<5>) = 1.
3. Clear the SPIROV bit (SPIxSTAT<6>).
4. Enable SPI operation by setting the SPIEN bit
(SPIxSTAT<15>).
5. Write the data to be transmitted to the SPIxBUF
register. Transmission (and reception) will start
as soon as data is written to the SPIxBUF
register.
To set up the SPI module for the Standard Slave mode
of operation:
1. Clear the SPIxBUF register.
2. If using interrupts:
a) Clear the SPIxIF bit in the respective IFS
register.
b) Set the SPIxIE bit in the respective IEC
register.
c) Write the SPIxIP bits in the respective IPC
register to set the interrupt priority.
3. Write the desired settings to the SPIxCON1
and SPIxCON2 registers with MSTEN
(SPIxCON1<5>) = 0.
4. Clear the SMP bit.
5. If the CKE bit (SPIxCON1<8>) is set, then the
SSEN bit (SPIxCON1<7>) must be set to enable
the SSx pin.
6. Clear the SPIROV bit (SPIxSTAT<6>).
7. Enable SPI operation by setting the SPIEN bit
(SPIxSTAT<15>).
FIGURE 16-1: SP Ix MODULE BLOCK DIAGRAM (STANDARD MODE)
Internal Data Bus
SDIx
SDOx
SSx/FSYNCx
SCKx
SPIxSR
bit 0
Shift Control
Edge
Select
Primary
1:1/4/16/64
Enable
Prescaler
Sync
Clock
Control
SPIxBUF
Control
Transfer
Transfer
Write SPIxBUF
Read SPIxBUF
16
SPIxCON1<1:0>
SPIxCON1<4:2>
Master Clock
Secondary
Prescaler
1:1 to 1:8
FCY
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To set up the SPI module for the Enhanced Buffer
Master mode of operation:
1. If using interrupts:
a) Clear the SPIxIF bit in the respective IFS
register.
b) Set the SPIxIE bit in the respective IEC
register.
c) Write the SPIxIP bits in the respective IPC
register.
2. Write the desired settings to the SPIxCON1
and SPIxCON2 registers with MSTEN
(SPIxCON1<5>) = 1.
3. Clear the SPIROV bit (SPIxSTAT<6>).
4. Select Enhanced Buffer mode by setting the
SPIBEN bit (SPIxCON2<0>).
5. Enable SPI operation by setting the SPIEN bit
(SPIxSTAT<15>).
6. Write the data to be transmitted to the SPIxBUF
register. Transmission (and reception) will start
as soon as data is written to the SPIxBUF
register.
To set up the SPI module for the Enhanced Buffer
Slave mode of operation:
1. Clear the SPIxBUF register.
2. If using interrupts:
a) Clear the SPIxIF bit in the respective IFS
register.
b) Set the SPIxIE bit in the respective IEC
register.
c) Write the SPIxIP bits in the respective IPC
register to set the interrupt priority.
3. Write the desired settings to the SPIxCON1
and SPIxCON2 registers with MSTEN
(SPIxCON1<5>) = 0.
4. Clear the SMP bit.
5. If the CKE bit is set, then the SSEN bit must be
set, thus enabling the SSx pin.
6. Clear the SPIROV bit (SPIxSTAT<6>).
7. Select Enhanced Buffer mode by setting the
SPIBEN bit (SPIxCON2<0>).
8. Enable SPI operation by setting the SPIEN bit
(SPIxSTAT<15>).
FIGURE 16-2: SP Ix MODULE BLOCK DIAGRAM (ENHANCED MODE)
Internal Data Bus
SDIx
SDOx
SSx/FSYNCx
SCKx
SPIxSR
bit 0
Shift Control
Edge
Select
FCY
Enable
Sync
Clock
Control
SPIXBUF
Control
Transfer
Transfer
Write SPIxBUF
Read SPIxBUF
16
SPIxCON1<1:0>
SPIxCON1<4:2>
Master Clock
8-Level FIFO
Receive Buffer
8-Level FIFO
Transmit Buffer
Primary
1:1/4/16/64
Prescaler
Secondary
Prescaler
1:1 to 1:8
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REGISTER 16-1: SPIxSTAT: SPIx STATUS AND CONTROL REGISTER
R/W-0 U-0 R/W-0 U-0 U-0 R-0, HSC R-0, HSC R-0, HSC
SPIEN(1)— SPISIDL —— SPIBEC2 SPIBEC1 SPIBEC0
bit 15 bit 8
R-0, HSC R/C-0, HS R-0, HSC R/W-0 R/W-0 R/W-0 R-0, HSC R-0, HSC
SRMPT SPIROV SRXMPT SISEL2 SISEL1 SISEL0 SPITBF SPIRBF
bit 7 bit 0
Legend: C = Clearable bit HS = Hardware Settable bit
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
HSC = Hardware Settable/Clearable bit
bit 15 SPIEN: SPIx Enable bit(1)
1 = Enables module and configures SCKx, SDOx, SDIx and SSx as serial port pins
0 = Disables module
bit 14 Unimplemented: Read as ‘0’
bit 13 SPISIDL: Stop in Idle Mode bit
1 = Discontinue module operation when device enters Idle mode
0 = Continue module operation in Idle mode
bit 12-11 Unimplemented: Read as ‘0’
bit 10-8 SPIBEC<2:0>: SPIx Buffer Element Count bits (valid in Enhanced Buffer mode)
Master mode:
Number of SPI transfers pending.
Slave mode:
Number of SPI transfers unread.
bit 7 SRMPT: Shift Register (SPIxSR) Empty bit (valid in Enhanced Buffer mode)
1 = SPIx Shift register is empty and ready to send or receive
0 = SPIx Shift register is not empty
bit 6 SPIROV: Receive Overflow Flag bit
1 = A new byte/word is completely received and discarded
The user software has not read the previous data in the SPIxBUF register.
0 = No overflow has occurred
bit 5 SRXMPT: Receive FIFO Empty bit (valid in Enhanced Buffer mode)
1 = Receive FIFO is empty
0 = Receive FIFO is not empty
bit 4-2 SISEL<2:0>: SPIx Buffer Interrupt Mode bits (valid in Enhanced Buffer mode)
111 = Interrupt when the SPIx transmit buffer is full (SPITBF bit is set)
110 = Interrupt when the last bit is shifted into SPIxSR; as a result, the TX FIFO is empty
101 = Interrupt when the last bit is shifted out of SPIxSR; now the transmit is complete
100 = Interrupt when one data is shifted into the SPIxSR; as a result, the TX FIFO has one open spot
011 = Interrupt when the SPIx receive buffer is full (SPIRBF bit is set)
010 = Interrupt when the SPIx receive buffer is 3/4 or more full
001 = Interrupt when data is available in the receive buffer (SRMPT bit is set)
000 = Interrupt when the last data in the receive buffer is read; as a result, the buffer is empty (SRXMPT
bit is set)
Note 1: If SPIEN = 1, these functions must be assigned to available RPn/RPIn pins before use. See Section 11.4
“Peripheral Pin Select (PPS)” for more information.
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bit 1 SPITBF: SPIx Transmit Buffer Full Status bit
1 = Transmit has not yet started, SPIxTXB is full
0 = Transmit has started, SPIxTXB is empty
In Standard Buffer mode:
Automatically set in hardware when the CPU writes to the SPIxBUF location, loading the SPIxTXB.
Automatically cleared in hardware when the SPIx module transfers data from SPIxTXB to SPIxSR.
In Enhanced Buffer mode:
Automatically set in hardware when the CPU writes to the SPIxBUF location, loading the last available
buffer location. Automatically cleared in hardware when a buffer location is available for a CPU write.
bit 0 SPIRBF: SPIx Receive Buffer Full Status bit
1 = Receive is complete, SPIxRXB is full
0 = Receive is not complete, SPIxRXB is empty
In Standard Buffer mode:
Automatically set in hardware when SPIx transfers data from SPIxSR to SPIxRXB. Automatically
cleared in hardware when the core reads the SPIxBUF location, reading SPIxRXB.
In Enhanced Buffer mode:
Automatically set in hardware when SPIx transfers data from the SPIxSR to the buffer, filling the last
unread buffer location. Automatically cleared in hardware when a buffer location is available for a trans-
fer from SPIxSR.
REGISTER 16-1: SPIxSTAT: SPIx STATUS AND CONTROL REGISTER (CONTINUED)
Note 1: If SPIEN = 1, these functions must be assigned to available RPn/RPIn pins before use. See Section 1 1.4
“Peripheral Pin Select (PPS)” for more information.
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REGISTER 16-2: SPIXCON1: SPIx CONTROL REGISTER 1
U-0 U-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
— — — DISSCK(1)DISSDO(2)MODE16 SMP CKE(3)
bit 15 bit 8
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
SSEN(4)CKP MSTEN SPRE2 SPRE1 SPRE0 PPRE1 PPRE0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-13 Unimplemented: Read as ‘0’
bit 12 DISSCK: Disable SCKx Pin bit (SPI Master modes only)(1)
1 = Internal SPI clock is disabled; pin functions as I/O
0 = Internal SPI clock is enabled
bit 11 DISSDO: Disable SDOx Pin bit(2)
1 = SDOx pin is not used by the module; pin functions as I/O
0 = SDOx pin is controlled by the module
bit 10 MODE16: Word/Byte Communication Select bit
1 = Communication is word-wide (16 bits)
0 = Communication is byte-wide (8 bits)
bit 9 SMP: SPIx Data Input Sample Phase bit
Master mode:
1 = Input data is sampled at the end of data output time
0 = Input data is sampled at the middle of data output time
Slave mode:
SMP must be cleared when SPIx is used in Slave mode.
bit 8 CKE: SPIx Clock Edge Select bit(3)
1 = Serial output data changes on transition from active clock state to Idle clock state (see bit 6)
0 = Serial output data changes on transition from Idle clock state to active clock state (see bit 6)
bit 7 SSEN: Slave Select Enable (Slave mode) bit(4)
1 =SSx pin is used for Slave mode
0 =SSx
pin is not used by the module; pin is controlled by the port function
bit 6 CKP: Clock Polarity Select bit
1 = Idle state for the clock is a high level; active state is a low level
0 = Idle state for the clock is a low level; active state is a high level
bit 5 MSTEN: Master Mode Enable bit
1 = Master mode
0 =Slave mode
Note 1: If DISSCK = 0, SCKx must be configured to an available RPn pin. See Section 11.4 “Peripheral Pin
Select (PPS)” for more information.
2: If DISSDO = 0, SDOx must be configured to an available RPn pin. See Section 11.4 “Peripheral Pin
Select (PPS)” for more information.
3: The CKE bit is not used in the Framed SPI modes. The user should program this bit to ‘0’ for the Framed
SPI modes (FRMEN = 1).
4: If SSEN = 1, SSx must be configured to an available RPn/PRIn pin. See Section 11.4 “Peripheral Pin
Select (PPS)” for more information.
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bit 4-2 SPRE<2:0>: Secondary Prescale bits (Master mode)
111 = Secondary prescale 1:1
110 = Secondary prescale 2:1
.
.
.
000 = Secondary prescale 8:1
bit 1-0 PPRE<1:0>: Primary Prescale bits (Master mode)
11 = Primary prescale 1:1
10 = Primary prescale 4:1
01 = Primary prescale 16:1
00 = Primary prescale 64:1
REGISTER 16-2: SPIXCON1: SPIx CONTROL REGISTER 1 (CONTINUED)
Note 1: If DISSCK = 0, SCKx must be configured to an available RPn pin. See Section 11.4 “Peripheral Pin
Select (PPS)” for more information.
2: If DISSDO = 0, SDOx must be configured to an available RPn pin. See Section 11.4 “Peripheral Pin
Select (PPS)” for more information.
3: The CKE bit is not used in the Framed SPI modes. The user should program this bit to ‘0’ for the Framed
SPI modes (FRMEN = 1).
4: If SSEN = 1, SSx must be configured to an available RPn/PRIn pin. See Section 11.4 “Peripheral Pin
Select (PPS)” for more information.
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REGISTER 16-3: SPIxCON2: SPIx CONTROL REGISTER 2
R/W-0 R/W-0 R/W-0 U-0 U-0 U-0 U-0 U-0
FRMEN SPIFSD SPIFPOL —————
bit 15 bit 8
U-0 U-0 U-0 U-0 U-0 U-0 R/W-0 R/W-0
— — — — — — SPIFE SPIBEN
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 FRMEN: Framed SPIx Support bit
1 = Framed SPIx support is enabled
0 = Framed SPIx support is disabled
bit 14 SPIFSD: Frame Sync Pulse Direction Control on SSx Pin bit
1 = Frame sync pulse input (slave)
0 = Frame sync pulse output (master)
bit 13 SPIFPOL: Frame Sync Pulse Polarity bit (Frame mode only)
1 = Frame sync pulse is active-high
0 = Frame sync pulse is active-low
bit 12-2 Unimplemented: Read as ‘0’
bit 1 SPIFE: Frame Sync Pulse Edge Select bit
1 = Frame sync pulse coincides with the first bit clock
0 = Frame sync pulse precedes the first bit clock
bit 0 SPIBEN: Enhanced Buffer Enable bit
1 = Enhanced buffer is enabled
0 = Enhanced buffer is disabled (Legacy mode)
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FIGURE 16-3: SP I MASTE R/SLA VE CONNECTION (STANDARD MODE)
FIGURE 16-4: SP I MAST ER /S LA VE CONNECTION (ENHANCED BUFFER MODES)
Serial Receive Buffer
(SPIxRXB)(2)
Shift Register
(SPIxSR)(2)
LSb
MSb
SDIx
SDOx
Processor 2 (SPI Slave)
SCKx
SSx(1)
Serial Transmit Buffer
(SPIxTXB)(2)
Serial Receive Buffer
(SPIxRXB)
Shift Register
(SPIxSR)
MSb LSb
SDOx
SDIx
Processor 1 (SPI Master)
Serial Clock
SSEN (SPIxCON1<7>) = 1 and MSTEN (SPIxCON1<5>) = 0
Note 1: Using the SSx pin in Slave mode of operation is optional.
2: User must write transmit data to read the received data from SPIxBUF. The SPIxTXB and SPIxRXB registers
are memory mapped to SPIxBUF.
SCKx
Serial Transmit Buffer
(SPIxTXB)
MSTEN (SPIxCON1<5>) = 1)
SPIx Buffer
(SPIxBUF)(2)
SPIx Buffer
(SPIxBUF)(2)
Shift Register
(SPIxSR)
LSb
MSb
SDIx
SDOx
Processor 2 (SPI Enhanced Buffer Slave)
SCKx
SSx(1)
Shift Register
(SPIxSR)
MSb LSb
SDOx
SDIx
Processor 1 (SPI Enhanced Buffer Master)
Serial Clock
SSEN (SPIxCON1<7>) = 1,
Note 1: Using the SSx pin in Slave mode of operation is optional.
2: User must write transmit data to read the received data from SPIxBUF. The SPIxTXB and SPIxRXB registers are
memory mapped to SPIxBUF.
SSx
SCKx
8-Level FIFO Buffer
MSTEN (SPIxCON1<5>) = 1 and
SPIx Buffer
(SPIxBUF)(2)
8-Level FIFO Buffer
SPIx Buffer
(SPIxBUF)(2)
SPIBEN (SPIxCON2<0>) = 1MSTEN (SPIxCON1<5>) = 0 and
SPIBEN (SPIxCON2<0>) = 1
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FIGURE 16-5: SPI MAST ER, FRAME MASTER CONNECTION DIAGRAM
FIGURE 16-6: SPI MAST E R, FR AME SLAVE CONNECTION DIAGRAM
FIGURE 16-7: SPI SLAVE, FRAME MASTER CONNECTION DIAGRAM
FIGURE 16-8: SPI SLAVE, FRAME SLAVE CONNECTION DIAGRAM
SDOx
SDIx
PIC24F
Serial Clock
SSx
SCKx
Frame Sync
Pulse
SDIx
SDOx
Processor 2
SSx
SCKx
(SPI Master, Frame Master)
SDOx
SDIx
PIC24F
Serial Clock
SSx
SCKx
Frame Sync
Pulse
SDIx
SDOx
Processor 2
SSx
SCKx
SPI Master, Frame Slave)
SDOx
SDIx
PIC24F
Serial Clock
SSx
SCKx
Frame Sync.
Pulse
SDIx
SDOx
Processor 2
SSx
SCKx
(SPI Slave, Frame Master)
SDOx
SDIx
PIC24F
Serial Clock
SSx
SCKx
Frame Sync
Pulse
SDIx
SDOx
Processor 2
SSx
SCKx
(SPI Slave, Frame Slave)
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EQUATION 16-1: RELATIONSHIP BETWEEN DEVICE AND SPI CLOCK SPEED(1)
Note 1: Based on FCY = FOSC/2; Doze mode and PLL are disabled.
FSCK = FCY
Primary Prescaler x Secondary Prescaler
TABLE 16-1: SAMPLE SCKx FREQUENCIES(1,2)
FCY = 16 MHz Secondary Prescaler Settings
1:1 2:1 4:1 6:1 8:1
Primary Prescaler Settings
1:1 Invalid 8000 4000 2667 2000
4:1 4000 2000 1000 667 500
16:1 1000 500 250 167 125
64:1 250 125 63 42 31
FCY = 5 MHz
Primary Prescaler Settings
1:1 5000 2500 1250 833 625
4:1 1250 625 313 208 156
16:1 313 156 78 52 39
64:17839201310
Note 1: Based on FCY = FOSC/2; Doze mode and PLL are disabled.
2: SCKx frequencies are shown in kHz.
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17.0 INTER-INTEGRATED
CIRCUIT™ (I2C™)
The Inter-Integrated Circuit™ (I2C™) module is a serial
interface useful for communicating with other periph-
eral or microcontroller devices. These peripheral
devices may be serial EEPROMs, display drivers, A/D
Converters, etc.
The I2C module supports these features:
• Independent master and slave logic
• 7-bit and 10-bit device addresses
• General call address as defined in the I
2
C protocol
• Clock stretching to provide delays for the
processor to respond to a slave data request
• Both 100 kHz and 400 kHz bus specifications
• Configurable address masking
• Multi-Master modes to prevent loss of messages
in arbitration
• Bus Repeater mode, allowing the acceptance of
all messages as a slave regardless of the address
• Automatic SCL
A block diagram of the module is shown in Figure 17-1.
17.1 Communicating as a Master in a
Single Master Environ ment
The details of sending a message in Master mode
depends on the communications protocol for the device
being communicated with. Typically, the sequence of
events is as follows:
1. Assert a Start condition on SDAx and SCLx.
2. Send the I2C device address byte to the slave
with a write indication.
3. Wait for and verify an Acknowledge from the
slave.
4. Send the first data byte (sometimes known as
the command) to the slave.
5. Wait for and verify an Acknowledge from the
slave.
6. Send the serial memory address low byte to the
slave.
7. Repeat Steps 4 and 5 until all data bytes are
sent.
8. Assert a Repeated Start condition on SDAx and
SCLx.
9. Send the device address byte to the slave with
a read indication.
10. Wait for and verify an Acknowledge from the
slave.
11. Enable master reception to receive serial
memory data.
12. Generate an ACK or NACK condition at the end
of a received byte of data.
13. Generate a Stop condition on SDAx and SCLx.
Note: This data sheet summarizes the features of
this group of PIC24F devices. It is not
intended to be a comprehensive reference
source. For more information, refer to the
“PIC24F Family Reference Manual”,
Section 24. “Inter-Integrated Circuit™
(I2C™)” (DS39702). The information in this
data sheet supersedes the information in
the FRM.
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FIGURE 17-1: I2C™ BLOCK DIAGRAM
I2CxRCV
Internal
Data Bus
SCLx
SDAx
Shift
Match Detect
I2CxADD
Start and Stop
Bit Detect
Clock
Address Match
Clock
Stretching
I2CxTRN
LSB
Shift Clock
BRG Down Counter
Reload
Control
TCY/2
Start and Stop
Bit Generation
Acknowledge
Generation
Collision
Detect
I2CxCON
I2CxSTAT
Control Logic
Read
LSB
Write
Read
I2CxBRG
I2CxRSR
Write
Read
Write
Read
Write
Read
Write
Read
Write
Read
I2CxMSK
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17.2 Setting Baud Rate When
Operating as a Bus Master
To compute the Baud Rate Generator reload value, use
Equation 17-1.
EQUATION 17-1: COMPUTING BAUD RATE
RELOAD VALUE(1,2)
17.3 Slave Address Masking
The I2CxMSK register (Register 17-3) designates
address bit positions as “don’t care” for both 7-Bit and
10-Bit Addressing modes. Setting a particular bit loca-
tion (= 1) in the I2CxMSK register causes the slave
module to respond whether the corresponding address
bit value is a ‘0’ or a ‘1’. For example, when I2CxMSK
is set to ‘00100000’, the slave module will detect both
addresses, ‘0000000’ and ‘0100000’.
To enable address masking, the Intelligent Peripheral
Management Interface (IPMI) must be disabled by
clearing the IPMIEN bit (I2CxCON<11>).
TABLE 17-2: I2C™ RESER VED ADDRES SES(1)
Note 1: Based on FCY = FOSC/2; Doze mode and
PLL are disabled.
2: These clock rate values are for guidance
only. The actual clock rate can be affected
by various system level parameters. The
actual clock rate should be measured in
its intended application.
FSCL = FCY
I2CxBRG + 1 + FCY
10,000,000
I2CxBRG = FCY
10,000,000
FCY
FSCL –– 1
or: ( )
Note: As a result of changes in the I2C™ proto-
col, the addresses in Table 17-2 are
reserved and will not be Acknowledged in
Slave mode. This includes any address
mask settings that include any of these
addresses.
TABLE 17-1: I2C™ CLOCK RATES(1,2)
Required System FSCL FCY I2CxBRG Value Actual FSCL
(Decimal) (Hexadecimal)
100 kHz 16 MHz 157 9D 100 kHz
100 kHz 8 MHz 78 4E 100 kHz
100 kHz 4 MHz 39 27 99 kHz
400 kHz 16 MHz 37 25 404 kHz
400 kHz 8 MHz 18 12 404 kHz
400 kHz 4 MHz 9 9 385 kHz
400 kHz 2 MHz 4 4 385 kHz
1 MHz 16 MHz 13 D 1.026 MHz
1MHz 8MHz 6 6 1.026MHz
1MHz 4MHz 3 3 0.909MHz
Note 1: Based on FCY = FOSC/2; Doze mode and PLL are disabled.
2: These clock rate values are for guidance only. The actual clock rate can be affected by various system
level parameters. The actual clock rate should be measured in its intended application.
Slave Address R/W Bit Description
0000 000 0 General Call Address(2)
0000 000 1 Start Byte
0000 001 x CBus Address
0000 01x x Reserved
0000 1xx x HS Mode Master Code
1111 0xx x 10-Bit Slave Upper Byte(3)
1111 1xx x Reserved
Note 1: The address bits listed here will never cause an address match, independent of address mask settings.
2: The address will be Acknowledged only if GCEN = 1.
3: A match on this address can only occur on the upper byte in 10-Bit Addressing mode.
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REGISTER 17-1: I2CxCON: I2Cx CONTROL REGISTER
R/W-0 U-0 R/W-0 R/W-1, HC R/W-0 R/W-0 R/W-0 R/W-0
I2CEN — I2CSIDL SCLREL IPMIEN A10M DISSLW SMEN
bit 15 bit 8
R/W-0 R/W-0 R/W-0 R/W-0, HC R/W-0, HC R/W-0, HC R/W-0, HC R/W-0, HC
GCEN STREN ACKDT ACKEN RCEN PEN RSEN SEN
bit 7 bit 0
Legend: HC = Hardware Clearable bit
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 I2CEN: I2Cx Enable bit
1 = Enables the I2Cx module and configures the SDAx and SCLx pins as serial port pins
0 = Disables the I2Cx module; all I2C™ pins are controlled by port functions
bit 14 Unimplemented: Read as ‘0’
bit 13 I2CSIDL: Stop in Idle Mode bit
1 = Discontinues module operation when device enters an Idle mode
0 = Continues module operation in Idle mode
bit 12 SCLREL: SCLx Release Control bit (when operating as I2C slave)
1 = Releases SCLx clock
0 = Holds SCLx clock low (clock stretch)
If STREN = 1:
Bit is R/W (i.e., software may write ‘0’ to initiate stretch and write ‘1’ to release clock). Hardware is clear
at the beginning of slave transmission. Hardware is clear at the end of slave reception.
If STREN = 0:
Bit is R/S (i.e., software may only write ‘1’ to release clock). Hardware is clear at the beginning of slave
transmission.
bit 11 IPMIEN: Intelligent Platform Management Interface (IPMI) Enable bit
1 = IPMI Support mode is enabled; all addresses are Acknowledged
0 = IPMI mode is disabled
bit 10 A10M: 10-Bit Slave Addressing bit
1 = I2CxADD is a 10-bit slave address
0 = I2CxADD is a 7-bit slave address
bit 9 DISSLW: Disable Slew Rate Control bit
1 = Slew rate control is disabled
0 = Slew rate control is enabled
bit 8 SMEN: SMBus Input Levels bit
1 = Enables I/O pin thresholds compliant with SMBus specifications
0 = Disables the SMBus input thresholds
bit 7 GCEN: General Call Enable bit (when operating as I2C slave)
1 = Enables interrupt when a general call address is received in the I2CxRSR (module is enabled for
reception)
0 = General call address is disabled
bit 6 STREN: SCLx Clock Stretch Enable bit (when operating as I2C slave)
Used in conjunction with the SCLREL bit.
1 = Enables software or receive clock stretching
0 = Disables software or receive clock stretching
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bit 5 ACKDT: Acknowledge Data bit (when operating as I2C master; applicable during master receive)
Value that will be transmitted when the software initiates an Acknowledge sequence.
1 = Sends NACK during Acknowledge
0 = Sends ACK during Acknowledge
bit 4 ACKEN: Acknowledge Sequence Enable bit
(when operating as I2C master; applicable during master receive)
1 = Initiates Acknowledge sequence on SDAx and SCLx pins and transmits the ACKDT data bit.
Hardware is clear at the end of the master Acknowledge sequence.
0 = Acknowledge sequence is not in progress
bit 3 RCEN: Receive Enable bit (when operating as I2C master)
1 = Enables Receive mode for I2C. Hardware is clear at the end of the eighth bit of the master receive
data byte.
0 = Receive sequence is not in progress
bit 2 PEN: Stop Condition Enable bit (when operating as I2C master)
1 = Initiates Stop condition on the SDAx and SCLx pins. Hardware is clear at the end of the master
Stop sequence.
0 = Stop condition is not in progress
bit 1 RSEN: Repeated Start Condition Enable bit (when operating as I2C master)
1 = Initiates Repeated Start condition on the SDAx and SCLx pins. Hardware is clear at the end of the
master Repeated Start sequence.
0 = Repeated Start condition is not in progress
bit 0 SEN: Start Condition Enable bit (when operating as I2C master)
1 = Initiates Start condition on SDAx and SCLx pins. Hardware is clear at the end of the master Start
sequence.
0 = Start condition is not in progress
REGISTER 17-1: I2CxCON: I2Cx CONTROL REGISTER (CONTINUED)
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REGISTER 17-2: I2CxSTAT: I2Cx STATUS REGISTE R
R-0, HSC R-0, HSC U-0 U-0 U-0 R/C-0, HS R-0, HSC R-0, HSC
ACKSTAT TRSTAT — — — BCL GCSTAT ADD10
bit 15 bit 8
R/C-0, HS R/C-0, HS R-0, HSC R/C-0, HSC R/C-0, HSC R-0, HSC R-0, HSC R-0, HSC
IWCOL I2COV D/A PSR/WRBF TBF
bit 7 bit 0
Legend: C = Clearable bit HS = Hardware Settable bit
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
HSC = Hardware Settable/Clearable bit
bit 15 ACKSTAT: Acknowledge Status bit
1 = NACK was detected last
0 = ACK was detected last
Hardware is set or cleared at the end of Acknowledge.
bit 14 TRSTAT: Transmit Status bit
(when operating as I2C™ master; applicable to master transmit operation.)
1 = Master transmit is in progress (8 bits + ACK)
0 = Master transmit is not in progress
Hardware is set at the beginning of master transmission; hardware is clear at the end of slave Acknowledge.
bit 13-11 Unimplemented: Read as ‘0’
bit 10 BCL: Master Bus Collision Detect bit
1 = A bus collision has been detected during a master operation
0 = No collision
Hardware is set at the detection of a bus collision.
bit 9 GCSTAT: General Call Status bit
1 = General call address was received
0 = General call address was not received
Hardware is set when the address matches the general call address; hardware is clear at Stop detection.
bit 8 ADD10: 10-Bit Address Status bit
1 = 10-bit address was matched
0 = 10-bit address was not matched
Hardware is set at the match of the 2nd byte of the matched 10-bit address; hardware is clear at Stop detection.
bit 7 IWCOL: Write Collision Detect bit
1 = An attempt to write to the I2CxTRN register failed because the I2C module is busy
0 = No collision
Hardware is set at an occurrence of write to I2CxTRN while busy (cleared by software).
bit 6 I2COV: Receive Overflow Flag bit
1 = A byte was received while the I2CxRCV register is still holding the previous byte
0 = No overflow
Hardware is set at an attempt to transfer I2CxRSR to I2CxRCV (cleared by software).
bit 5 D/A: Data/Address bit (when operating as I2C slave)
1 = Indicates that the last byte received was data
0 = Indicates that the last byte received was a device address
Hardware is clear at the device address match. Hardware is set after a transmission finishes or by
reception of a slave byte.
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bit 4 P: Stop bit
1 = Indicates that a Stop bit has been detected last
0 = Stop bit was not detected last
Hardware is set or clear when Start, Repeated Start or Stop is detected.
bit 3 S: Start bit
1 = Indicates that a Start (or Repeated Start) bit has been detected last
0 = Start bit was not detected last
Hardware is set or clear when Start, Repeated Start or Stop is detected.
bit 2 R/W: Read/Write Information bit (when operating as I2C slave)
1 = Read: Indicates the data transfer is output from the slave
0 = Write: Indicates the data transfer is input to the slave
Hardware is set or clear after the reception of an I2C device address byte.
bit 1 RBF: Receive Buffer Full Status bit
1 = Receive is complete, I2CxRCV is full
0 = Receive is not complete, I2CxRCV is empty
Hardware is set when I2CxRCV is written with the received byte; hardware is clear when the software
reads I2CxRCV.
bit 0 TBF: Transmit Buffer Full Status bit
1 = Transmit is in progress, I2CxTRN is full
0 = Transmit is complete, I2CxTRN is empty
Hardware is set when software writes to I2CxTRN; hardware is clear at the completion of data transmission.
REGISTER 17-2: I2CxSTAT: I2Cx STATUS REGISTER (CONTINUED)
REGISTER 17-3: I2CxMSK: I2Cx SLAVE MODE ADDRESS MASK REGIS TER
U-0 U-0 U-0 U-0 U-0 U-0 R/W-0 R/W-0
— — — — — — AMSK9 AMSK8
bit 15 bit 8
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
AMSK7 AMSK6 AMSK5 AMSK4 AMSK3 AMSK2 AMSK1 AMSK0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-10 Unimplemented: Read as ‘0’
bit 9-0 AMSK<9:0>: Mask for Address Bit x Select bits
1 = Enables masking for bit x of the incoming message address; bit match is not required in this position
0 = Disables masking for bit x; bit match is required in this position
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NOTES:
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18.0 UNIVERSAL ASYNCHRONOUS
RECEIVER TRANSMITTER
(UART)
The Universal Asynchronous Receiver Transmitter
(UART) module is one of the serial I/O modules available
in the PIC24F device family. The UART is a full-duplex,
asynchronous system that can communicate with
peripheral devices, such as personal computers,
LIN/J2602, RS-232 and RS-485 interfaces. The module
also supports a hardware flow control option with the
UxCTS and UxRTS pins, and includes an IrDA® encoder
and decoder.
The primary features of the UART module are:
• Full-Duplex, 8 or 9-Bit Data Transmission through
the UxTX and UxRX Pins
• Even, Odd or No Parity Options (for 8-bit data)
• One or Two Stop bits
• Hardware Flow Control Option with the UxCTS
and UxRTS Pins
• Fully Integrated Baud Rate Generator with 16-Bit
Prescaler
• Baud Rates Ranging from 15 bps to 1 Mbps at
16 MIPS
• 4-Deep, First-In-First-Out (FIFO) Transmit Data
Buffer
• 4-Deep FIFO Receive Data Buffer
• Parity, Framing and Buffer Overrun Error Detection
• Support for 9-bit mode with Address Detect
(9th bit = 1)
• Transmit and Receive Interrupts
• Loopback mode for Diagnostic Support
• Support for Sync and Break Characters
• Supports Automatic Baud Rate Detection
•IrDA
® Encoder and Decoder Logic
• 16x Baud Clock Output for IrDA Support
A simplified block diagram of the UART is shown in
Figure 18-1. The UART module consists of these key
important hardware elements:
• Baud Rate Generator
• Asynchronous Transmitter
• Asynchronous Receiver
FIGURE 18-1: UART SIMPLIFIED BLOCK DIAGRAM
Note: This data sheet summarizes the features of
this group of PIC24F devices. It is not
intended to be a comprehensive reference
source. For more information, refer to the
“PIC24F Family Reference Manual”,
Section 21. “UART” (DS39708). The
information in this data sheet supersedes
the information in the FRM.
UxRX
IrDA®
Hardware Flow Control
UARTx Receiver
UARTx Transmitter UxTX
UxCTS
UxRTS/BCLKx
Baud Rate Generator
Note: The UART inputs and outputs must all be assigned to available RPn/RPIn pins before use. See Section 11.4
“Periphera l Pin Select (PP S) ” for more information.
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18.1 UART Baud Rate Generator (BRG)
The UART module includes a dedicated, 16-bit Baud
Rate Generator. The UxBRG register controls the
period of a free-running, 16-bit timer. Equation 18-1
shows the formula for computation of the baud rate with
BRGH = 0.
EQUATION 18-1: UART BAUD RATE WITH
BRGH = 0(1,2)
Example 18-1 shows the calculation of the baud rate
error for the following conditions:
•FCY = 4 MHz
• Desired Baud Rate = 9600
The maximum baud rate (BRGH = 0) possible is
FCY/16 (for UxBRG = 0) and the minimum baud rate
possible is FCY/(16 * 65536).
Equation 18-2 shows the formula for computation of
the baud rate with BRGH = 1.
EQUATION 18-2: UART BAUD RATE WITH
BRGH = 1(1,2)
The maximum baud rate (BRGH = 1) possible is FCY/4
(for UxBRG = 0) and the minimum baud rate possible
is FCY/(4 * 65536).
Writing a new value to the UxBRG register causes the
BRG timer to be reset (cleared). This ensures the BRG
does not wait for a timer overflow before generating the
new baud rate.
EXAMPLE 18-1: BAUD RATE ERRO R CALCULATION (BRGH = 0)(1)
Note 1: FCY denotes the instruction cycle clock
frequency (FOSC/2).
2: Based on FCY = FOSC/2; Doze mode
and PLL are disabled.
Baud Rate = FCY
16 • (UxBRG + 1)
UxBRG = FCY
16 • Baud Rate – 1
Note 1: FCY denotes the instruction cycle clock
frequency.
2: Based on FCY = FOSC/2; Doze mode
and PLL are disabled.
Baud Rate = FCY
4 • (UxBRG + 1)
UxBRG = FCY
4 • Baud Rate – 1
Note 1: Based on FCY = FOSC/2; Doze mode and PLL are disabled.
Desired Baud Rate = FCY/(16 (BRGx + 1))
Solving for BRGx Value:
BRGx = ((FCY/Desired Baud Rate)/16) – 1
BRGx = ((4000000/9600)/16) – 1
BRGx = 25
Calculated Baud Rate = 4000000/(16 (25 + 1 ))
= 9615
Error = (Calculated Baud Rate – Desired Baud Rate)
Desired Baud Rate
= (9615 – 96 00)/9600
=0.16%
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18.2 Transmitting in 8-Bit Data Mode
1. Set up the UART:
a) Write appropriate values for data, parity and
Stop bits.
b) Write appropriate baud rate value to the
UxBRG register.
c) Set up transmit and receive interrupt enable
and priority bits.
2. Enable the UART.
3. Set the UTXEN bit (causes a transmit interrupt,
two cycles after being set).
4. Write a data byte to the lower byte of the
UxTXREG word. The value will be immediately
transferred to the Transmit Shift Register (TSR)
and the serial bit stream will start shifting out
with the next rising edge of the baud clock.
5. Alternatively, the data byte may be transferred
while UTXEN = 0 and then the user may set
UTXEN. This will cause the serial bit stream to
begin immediately because the baud clock will
start from a cleared state.
6. A transmit interrupt will be generated as per
interrupt control bit, UTXISELx.
18.3 Transmitting in 9-Bit Data Mode
1. Set up the UART (as described in Section 18.2
“Transmitting in 8-Bit Data Mode”).
2. Enable the UART.
3. Set the UTXEN bit (causes a transmit interrupt).
4. Write UxTXREG as a 16-bit value only.
5. A word write to UxTXREG triggers the transfer
of the 9-bit data to the TSR. The serial bit stream
will start shifting out with the first rising edge of
the baud clock.
6. A transmit interrupt will be generated as per the
setting of control bit, UTXISELx.
18.4 Break and Sync Transmit
Sequence
The following sequence will send a message frame
header, made up of a Break, followed by an auto-baud
Sync byte.
1. Configure the UART for the desired mode.
2. Set UTXEN and UTXBRK to set up the Break
character.
3. Load the UxTXREG with a dummy character to
initiate transmission (value is ignored).
4. Write ‘55h’ to UxTXREG; this loads the Sync
character into the transmit FIFO.
5. After the Break has been sent, the UTXBRK bit
is reset by hardware. The Sync character now
transmits.
18.5 Receiving in 8-Bit or 9-Bit Data
Mode
1. Set up the UART (as described in Section 18.2
“Transmitting in 8-Bit Data Mode”).
2. Enable the UART.
3. A receive interrupt will be generated when one
or more data characters have been received as
per interrupt control bit, URXISELx.
4. Read the OERR bit to determine if an overrun
error has occurred. The OERR bit must be reset
in software.
5. Read UxRXREG.
The act of reading the UxRXREG character will move
the next character to the top of the receive FIFO,
including a new set of PERR and FERR values.
18.6 Operation of UxCTS and UxRTS
Control Pins
UARTx Clear to Send (UxCTS) and Request to Send
(UxRTS) are the two hardware controlled pins that are
associated with the UART module. These two pins
allow the UART to operate in Simplex and Flow Control
mode. They are implemented to control the transmis-
sion and reception between the Data Terminal
Equipment (DTE). The UEN<1:0> bits in the UxMODE
register configure these pins.
18.7 Infrared Support
The UART module provides two types of infrared UART
support: one is the IrDA clock output to support an
external IrDA encoder and decoder device (legacy
module support), and the other is the full implementa-
tion of the IrDA encoder and decoder. Note that
because the IrDA modes require a 16x baud clock, they
will only work when the BRGH bit (UxMODE<3>) is ‘0’.
18.7.1 IrDA CLOCK OUTPUT FOR
EXTERNAL IrDA SUPPORT
To support external IrDA encoder and decoder devices,
the BCLKx pin (same as the UxRTS pin) can be
configured to generate the 16x baud clock. With
UEN<1:0> = 11, the BCLKx pin will output the 16x
baud clock if the UART module is enabled. It can be
used to support the IrDA codec chip.
18.7.2 BUILT-IN IrDA ENCODER AND
DECODER
The UART has full implementation of the IrDA encoder
and decoder as part of the UART module. The built-in
IrDA encoder and decoder functionality is enabled
using the IREN bit (UxMODE<12>). When enabled
(IREN = 1), the receive pin (UxRX) acts as the input
from the infrared receiver. The transmit pin (UxTX) acts
as the output to the infrared transmitter.
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REGISTER 18-1: UxMODE: UARTx MODE REGISTER
R/W-0 U-0 R/W-0 R/W-0 R/W-0 U-0 R/W-0 R/W-0
UARTEN(1)— USIDL IREN(2)RTSMD — UEN1 UEN0
bit 15 bit 8
R/W-0, HC R/W-0 R/W-0, HC R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
WAKE LPBACK ABAUD RXINV BRGH PDSEL1 PDSEL0 STSEL
bit 7 bit 0
Legend: HC = Hardware Clearable bit
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 UARTEN: UARTx Enable bit(1)
1 = UARTx is enabled; all UARTx pins are controlled by UARTx as defined by UEN<1:0>
0 = UARTx is disabled; all UARTx pins are controlled by port latches; UARTx power consumption is minimal
bit 14 Unimplemented: Read as ‘0’
bit 13 USIDL: Stop in Idle Mode bit
1 = Discontinue module operation when device enters Idle mode
0 = Continue module operation in Idle mode
bit 12 IREN: IrDA® Encoder and Decoder Enable bit(2)
1 = IrDA encoder and decoder are enabled
0 = IrDA encoder and decoder are disabled
bit 11 RTSMD: Mode Selection for UxRTS Pin bit
1 =UxRTS pin is in Simplex mode
0 =UxRTS
pin is in Flow Control mode
bit 10 Unimplemented: Read as ‘0’
bit 9-8 UEN<1:0>: UARTx Enable bits
11 = UxTX, UxRX and BCLKx pins are enabled and used; UxCTS pin is controlled by port latches
10 = UxTX, UxRX, UxCTS and UxRTS pins are enabled and used
01 = UxTX, UxRX and UxRTS pins are enabled and used; UxCTS pin is controlled by port latches
00 = UxTX and UxRX pins are enabled and used; UxCTS and UxRTS/BCLKx pins are controlled by port
latches
bit 7 WAKE: Wake-up on Start Bit Detect During Sleep Mode Enable bit
1 = UARTx will continue to sample the UxRX pin; interrupt is generated on the falling edge, bit is cleared
in hardware on the following rising edge
0 = No wake-up is enabled
bit 6 LPBACK: UARTx Loopback Mode Select bit
1 = Enable Loopback mode
0 = Loopback mode is disabled
bit 5 ABAUD: Auto-Baud Enable bit
1 = Enable baud rate measurement on the next character – requires reception of a Sync field (55h);
cleared in hardware upon completion
0 = Baud rate measurement is disabled or completed
Note 1: If UARTEN = 1, the peripheral inputs and outputs must be configured to an available RPn/RPIn pin. See
Section 11.4 “Peripheral Pin Select (PPS)” for more information.
2: This feature is only available for the 16x BRG mode (BRGH = 0).
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bit 4 RXINV: Receive Polarity Inversion bit
1 = UxRX Idle state is ‘0’
0 = UxRX Idle state is ‘1’
bit 3 BRGH: High Baud Rate Enable bit
1 = High-Speed mode (4 BRG clock cycles per bit)
0 = Standard Speed mode (16 BRG clock cycles per bit)
bit 2-1 PDSEL<1:0>: Parity and Data Selection bits
11 = 9-bit data, no parity
10 = 8-bit data, odd parity
01 = 8-bit data, even parity
00 = 8-bit data, no parity
bit 0 STSEL: Stop Bit Selection bit
1 = Two Stop bits
0 = One Stop bit
REGISTER 18-1: UxMODE: UARTx MODE REGISTER (CONTINUED)
Note 1: If UARTEN = 1, the peripheral inputs and outputs must be configured to an available RPn/RPIn pin. See
Section 11.4 “Peripheral Pin Select (PPS)” for more information.
2: This feature is only available for the 16x BRG mode (BRGH = 0).
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REGISTER 18-2: UxSTA: UARTx STATUS AND CONTROL REGISTER
R/W-0 R/W-0 R/W-0 U-0 R/W-0 HC R/W-0 R-0, HSC R-1, HSC
UTXISEL1 UTXINV(1)UTXISEL0 — UTXBRK UTXEN(2)UTXBF TRMT(3)
bit 15 bit 8
R/W-0 R/W-0 R/W-0 R-1, HSC R-0, HSC R-0, HSC R/C-0, HS R-0, HSC
URXISEL1 URXISEL0 ADDEN RIDLE PERR FERR OERR URXDA
bit 7 bit 0
Legend: C = Clearable bit HSC = Hardware Settable/Clearable bit
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
HS = Hardware Settable bit HC = Hardware Clearable bit
bit 15,13 UTXISEL<1:0>: Transmission Interrupt Mode Selection bits
11 = Reserved; do not use
10 = Interrupt when a character is transferred to the Transmit Shift Register (TSR), and as a result, the
transmit buffer becomes empty
01 = Interrupt when the last character is shifted out of the Transmit Shift Register; all transmit
operations are completed
00 = Interrupt when a character is transferred to the Transmit Shift Register (this implies there is at least
one character open in the transmit buffer)
bit 14 UTXINV: IrDA® Encoder Transmit Polarity Inversion bit(1)
IREN = 0:
1 = UxTX is Idle ‘0’
0 = UxTX is Idle ‘1’
IREN = 1:
1 = UxTX is Idle ‘1’
0 = UxTX is Idle ‘0’
bit 12 Unimplemented: Read as ‘0’
bit 11 UTXBRK: Transmit Break bit
1 = Send Sync Break on next transmission – Start bit, followed by twelve ‘0’ bits, followed by Stop bit;
cleared by hardware upon completion
0 = Sync Break transmission is disabled or completed
bit 10 UTXEN: Transmit Enable bit(2)
1 = Transmit is enabled, UxTX pin is controlled by UARTx
0 = Transmit is disabled, any pending transmission is aborted and the buffer is reset; UxTX pin is
controlled by the port.
bit 9 UTXBF: Transmit Buffer Full Status bit (read-only)
1 = Transmit buffer is full
0 = Transmit buffer is not full, at least one more character can be written
bit 8 TRMT: Transmit Shift Register Empty bit (read-only)(3)
1 = Transmit Shift Register is empty and transmit buffer is empty (the last transmission has completed)
0 = Transmit Shift Register is not empty, a transmission is in progress or queued
Note 1: The value of the bit only affects the transmit properties of the module when the IrDA® encoder is enabled
(IREN = 1).
2: If UARTEN = 1, the peripheral inputs and outputs must be configured to an available RPn/RPIn pin. See
Section 11.4 “Peripheral Pin Select (PPS)” for more information.
3: The TRMT bit will be active only after two instruction, cycles once the UTXREG is loaded.
2010-2011 Microchip Technology Inc. DS39996F-page 247
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bit 7-6 URXISEL<1:0>: Receive Interrupt Mode Selection bits
11 = Interrupt is set on an RSR transfer, making the receive buffer full (i.e., has 4 data characters)
10 = Interrupt is set on an RSR transfer, making the receive buffer 3/4 full (i.e., has 3 data characters)
0x = Interrupt is set when any character is received and transferred from the RSR to the receive buffer;
receive buffer has one or more characters
bit 5 ADDEN: Address Character Detect bit (bit 8 of received data = 1)
1 = Address Detect mode is enabled (if 9-bit mode is not selected, this does not take effect)
0 = Address Detect mode is disabled
bit 4 RIDLE: Receiver Idle bit (read-only)
1 = Receiver is Idle
0 = Receiver is active
bit 3 PERR: Parity Error Status bit (read-only)
1 = Parity error has been detected for the current character (character at the top of the receive FIFO)
0 = Parity error has not been detected
bit 2 FERR: Framing Error Status bit (read-only)
1 = Framing error has been detected for the current character (character at the top of the receive FIFO)
0 = Framing error has not been detected
bit 1 OERR: Receive Buffer Overrun Error Status bit (clear/read-only)
1 = Receive buffer has overflowed
0 = Receive buffer has not overflowed (clearing a previously set OERR bit (10 transition); will reset
the receiver buffer and the RSR to the empty state
bit 0 URXDA: Receive Buffer Data Available bit (read-only)
1 = Receive buffer has data, at least one more character can be read
0 = Receive buffer is empty
REGISTER 18-2: UxSTA: UARTx STATUS AND CONTROL REGISTER (CONTINUED)
Note 1: The value of the bit only affects the transmit properties of the module when the IrDA® encoder is enabled
(IREN = 1).
2: If UARTEN = 1, the peripheral inputs and outputs must be configured to an available RPn/RPIn pin. See
Section 11.4 “Peripheral Pin Select (PPS)” for more information.
3: The TRMT bit will be active only after two instruction, cycles once the UTXREG is loaded.
PIC24FJ128GA310 FAMILY
DS39996F-page 248 2010-2011 Microchip Technology Inc.
NOTES:
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19.0 DATA SIGNAL MODULATOR
The Data Signal Modulator (DSM) allows the user to
mix a digital data stream (the “modulator signal”) with a
carrier signal to produce a modulated output. Both the
carrier and the modulator signals are supplied to the
DSM module, either internally from the output of a
peripheral, or externally through an input pin.
The modulated output signal is generated by perform-
ing a logical AND operation of both the carrier and
modulator signals and then it is provided to the MDOUT
pin. Using this method, the DSM can generate the
following types of key modulation schemes:
• Frequency Shift Keying (FSK)
• Phase Shift Keying (PSK)
• On-Off Keying (OOK)
Figure 19-1 shows a simplified block diagram of the
Data Signal Modulator peripheral.
FIGURE 19-1: SI MPLI FIED BLOCK DIAGRAM OF THE DATA SIGNAL MODULATOR
Note: This data sheet summarizes the features of
this group of PIC24F devices. It is not
intended to be a comprehensive reference
source. For more information, refer to the
“PIC24F Family Reference Manual”,
Section 55. “Data Signal Modulator
(DSM)” (DS39744). The information in this
data sheet supersedes the information in
the FRM.
D
Q
MDBIT
MDMIN
SSP1 (SDO)
SSP2 (SDO)
UART1 (TX)
UART2 (TX)
UART3 (TX)
UART4 (TX)
VSS
MDCIN1
MDCIN2
REFO Clock
OC/PWM1
OC/PWM2
OC/PWM3
OC/PWM4
MDCH<3:0>
MDMS<3:0>
MDCL<3:0>
OC/PWM1
OC/PWM2
SYNC
CHPOL
CLPOL
D
Q1
0
SYNC
1
0
CHSYNC
CLSYNC
MDOUT
MDOPOL MDOE
CARH
CARL
EN
MDEN
Data Signal
Modulator
MOD
OC/PWM5
OC/PWM6
OC/PWM7
VSS
MDCIN1
MDCIN2
REFO Clock
OC/PWM1
OC/PWM2
OC/PWM3
OC/PWM4
OC/PWM5
OC/PWM6
OC/PWM7
OC/PWM3
OC/PWM4
OC/PWM5
OC/PWM6
OC/PWM7
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DS39996F-page 250 2010-2011 Microchip Technology Inc.
REGISTER 19-1: MDCON: MODULATOR CONTROL REGISTER
R/W-0 U-0 R/W-0 U-0 U-0 U-0 U-0 U-0
MDEN —MSIDL— — — — —
bit 15 bit 8
U-0 R/W-0 R/W-0 R/W-0 U-0 U-0 U-0 R/W-0
— MDOE MDSLR MDOPOL — — —MDBIT
(1)
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 MDEN: Modulator Module Enable bit
1 = Modulator module is enabled and mixing input signals
0 = Modulator module is disabled and has no output
bit 14 Unimplemented: Read as ‘0’
bit 13 MSIDL: Modulator Stop in Idle Mode bit
1 = Discontinue module operation when device enters Idle mode
0 = Continue module operation in Idle mode
bit 12-7 Unimplemented: Read as ‘0’
bit 6 MDOE: Modulator Module Pin Output Enable bit
1 = Modulator pin output is enabled
0 = Modulator pin output is disabled
bit 5 MDSLR: MDOUT Pin Slew Rate Limiting bit
1 = MDOUT pin slew rate limiting is enabled
0 = MDOUT pin slew rate limiting is disabled
bit 4 MDOPOL: Modulator Output Polarity Select bit
1 = Modulator output signal is inverted
0 = Modulator output signal is not inverted
bit 3-1 Unimplemented: Read as ‘0’
bit 0 MDBIT: Manual Modulation Input bit(1)
1 = Carrier is modulated
0 = Carrier is not modulated
Note 1: The MDBIT must be selected as the modulation source (MDSRC<3:0> = 0000).
2010-2011 Microchip Technology Inc. DS39996F-page 251
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REGISTER 19-2: MDSRC: MODULATOR SOURCE CONTROL REGISTER
U-0 U-0 U-0 U-0 U-0 U-0 U-0 U-0
— — — — — — — —
bit 15 bit 8
R/W-x U-0 U-0 U-0 R/W-x R/W-x R/W-x R/W-x
SODIS(1)— — —MS3
(2)MS2(2)MS1(2)MS0(2)
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-8 Unimplemented: Read as ‘0’
bit 7 SODIS: Modulation Source Output Disable bit(1)
1 = Output signal driving the peripheral output pin (selected by MDMS<3:0>) is disabled
0 = Output signal driving the peripheral output pin (selected by MDMS<3:0>) is enabled
bit 6-4 Unimplemented: Read as ‘0’
bit 3-0 MS<3:0> Modulation Source Selection bits(2)
1111 = Unimplemented
1110 = Output Compare/PWM Module 7 output
1101 = Output Compare/PWM Module 6 output
1100 = Output Compare/PWM Module 5 output
1011 = Output Compare/PWM Module 4 output
1010 = Output Compare/PWM Module 3 output
1001 = Output Compare/PWM Module 2 output
1000 = Output Compare/PWM Module 1 output
0111 = UART4 TX output
0110 = UART3 TX output
0101 = UART2 TX output
0100 = UART1 TX output
0011 = SPI2 module output (SDO2)
0010 = SPI1 module output (SDO1)
0001 = Input on MDMIN pin
0000 = Manual modulation using MDBIT (MDCON<0>)
Note 1: This bit is only affected by a POR.
2: These bits are not affected by a POR.
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DS39996F-page 252 2010-2011 Microchip Technology Inc.
REGISTER 19-3: MDCAR: MODULATOR CARRIER CONTROL REGISTER
R/W-x R/W-x R/W-x U-0 R/W-x R/W-x R/W-x R/W-x
CHODIS CHPOL CHSYNC — CH3(1)CH2(1)CH1(1)CH0(1)
bit 15 bit 8
R/W-0 R/W-x R/W-x U-0 R/W-x R/W-x R/W-x R/W-x
CLODIS CLPOL CLSYNC —CL3
(1)CL2(1)CL1(1)CL0(1)
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 CHODIS: Modulator High Carrier Output Disable bit
1 = Output signal driving the peripheral output pin (selected by CH<3:0>) is disabled
0 = Output signal driving the peripheral output pin is enabled
bit 14 CHPOL: Modulator High Carrier Polarity Select bit
1 = Selected high carrier signal is inverted
0 = Selected high carrier signal is not inverted
bit 13 CHSYNC: Modulator High Carrier Synchronization Enable bit
1 = Modulator waits for a falling edge on the high carrier before allowing a switch to the low carrier
0 = Modulator output is not synchronized to the high time carrier signal(1)
bit 12 Unimplemented: Read as ‘0’
bit 11-8 CH<3:0> Modulator Data High Carrier Selection bits(1)
1111
. . . = Reserved
1011
1010 = Output Compare/PWM Module 7 output
1001 = Output Compare/PWM Module 6 output
1000 = Output Compare/PWM Module 5 output
0111 = Output Compare/PWM Module 4 output
0110 = Output Compare/PWM Module 3 output
0101 = Output Compare/PWM Module 2 output
0100 = Output Compare/PWM Module 1 output
0011 = Reference clock (REFO) output
0010 = Input on MDCIN2 pin
0001 = Input on MDCIN1 pin
0000 = VSS
bit 7 CLODIS: Modulator Low Carrier Output Disable bit
1 = Output signal driving the peripheral output pin (selected by CL<3:0>) is disabled
0 = Output signal driving the peripheral output pin is enabled
bit 6 CLPOL: Modulator Low Carrier Polarity Select bit
1 = Selected low carrier signal is inverted
0 = Selected low carrier signal is not inverted
bit 5 CLSYNC: Modulator Low Carrier Synchronization Enable bit
1 = Modulator waits for a falling edge on the low carrier before allowing a switch to the high carrier
0 = Modulator output is not synchronized to the low time carrier signal(1)
bit 4 Unimplemented: Read as ‘0’
bit 3-0 CL<3:0> Modulator Data Low Carrier Selection bits(1)
Bit settings are identical to those for CH<3:0>.
Note 1: Narrowed carrier pulse widths or spurs may occur in the signal stream if the carrier is not synchronized.
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20.0 ENHANCED PARALLEL
MASTER PORT (EPMP)
The Enhanced Parallel Master Port (EPMP) module
provides a parallel, 4-bit (Master mode only), 8-bit
(Master and Slave modes) or 16-bit (Master mode only)
data bus interface to communicate with off-chip mod-
ules, such as memories, FIFOs, LCD controllers and
other microcontrollers. This module can serve as either
the master or the slave on the communication bus.
For EPMP Master modes, all external addresses are
mapped into the internal Extended Data Space (EDS).
This is done by allocating a region of the EDS for each
chip select, and then assigning each chip select to a
particular external resource, such as a memory or
external controller. This region should not be assigned
to another device resource, such as RAM or SFRs. To
perform a write or read on an external resource, the
CPU simply performs a write or read within the address
range assigned for the EPMP.
Key features of the EPMP module are:
• Extended Data Space (EDS) interface allows
direct access from the CPU
• Up to 23 Programmable Address Lines
• Up to 2 Chip Select lines
• Up to 2 Acknowledgement Lines
(one per chip select)
• 4-bit, 8-bit or 16-bit wide Data Bus
• Programmable Strobe Options (per chip select)
- Individual Read and Write Strobes or;
- Read/Write Strobe with Enable Strobe
• Programmable Address/Data Multiplexing
• Programmable Address Wait States
• Programmable Data Wait States (per chip select)
• Programmable Polarity on Control Signals
(per chip select)
• Legacy Parallel Slave Port Support
• Enhanced Parallel Slave Support
- Address Support
- 4-Byte Deep Auto-Incrementing Buffer
20.1 Specific Package Variations
While all PIC24FJ128GA310 family devices implement
the EPMP, I/O pin constraints place some limits on
16-Bit Master mode operations in some package types.
This is reflected in the number of dedicated Chip Select
pins implemented and the number of dedicated
address lines that are available. The differences are
summarized in Table 20-1. All available EPMP pin
functions are summarized in Table 20- 2 .
For 64-pin devices, the dedicated Chip Select pins
(PMCS1 and PMCS2) are not implemented. In addi-
tion, only 16 address lines (PMA<15:0>) are available.
If required, PMA14 and PMA15 can be remapped to
function as PMCS1 and PMCS2, respectively.
For 80-pin devices, the dedicated PMCS2 pin is not
implemented. It also only implements 16 address lines
(PMA<15:0>). If required, PMA15 can be remapped to
function as PMCS2.
The memory space addressable by the device
depends on the number of address lines available, as
well as the number of Chip Select signals required for
the application. Devices with lower pin counts are more
affected by Chip Select requirements, as these take
away address lines. Table 20-1 shows the maximum
addressable range for each pin count.
TABLE 20-1: EPMP FEATURE DIFFERENCES BY DEVICE PIN COUNT
Note: This data sheet summarizes the features of
this group of PIC24F devices. It is not
intended to be a comprehensive reference
source. For more information, refer to the
“PIC24F Family Reference Manual”,
Section 42. “Enhanced Parallel Master
Port (EPMP)” (DS39730). The informa-
tion in this data sheet supersedes the
information in the FRM.
Device Dedicated Chip Select Address
Lines
Address R ange (bytes)
CS1 CS2 No CS 1 CS 2 CS
PIC24FJXXXGA306 (64-pin) — — 16 64K 32K 16K
PIC24FJXXXGA308 (80-pin) X — 16 64K 32K
PIC24FJXXXGA310 (100-pin) X X 23 16M
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DS39996F-page 254 2010-2011 Microchip Technology Inc.
TABLE 20-2: ENHANCED PARALLEL MASTER PORT PIN DESCRIPTIONS
Pin Name
(Alternate Function) Type Description
PMA<22:16> O Address Bus bits<22:16>
PMA<15> O Address Bus bit 15
I/O Data Bus bit 15 (16-bit port with multiplexed addressing)
(PMCS2) O Chip Select 2 (alternate location)
PMA<14> O Address Bus bit 14
I/O Data Bus bit 14 (16-bit port with multiplexed addressing)
(PMCS1) O Chip Select 1 (alternate location)
PMA<13:8> O Address Bus bits<13:8>
I/O Data Bus bits<13:8> (16-bit port with multiplexed addressing)
PMA<7:3> O Address Bus bits<7:3>
PMA<2>
(PMALU)
O Address Bus bit 2
O Address Latch Upper Strobe for Multiplexed Address
PMA<1>
(PMALH)
I/O Address Bus bit 1
O Address Latch High Strobe for Multiplexed Address
PMA<0>
(PMALL)
I/O Address Bus bit 0
O Address Latch Low Strobe for Multiplexed Address
PMD<15:8> I/O Data Bus bits<15:8> (demultiplexed addressing)
PMD<7:4> I/O Data Bus bits<7:4>
O Address Bus bits<7:4> (4-bit port with 1-phase multiplexed addressing)
PMD<3:0> I/O Data Bus bits<3:0>
PMCS1(1)I/O Chip Select 1
PMCS2(2)O Chip Select 2
PMWR I/O Write Strobe(3)
(PMENB) I/O Enable Signal(3)
PMRD I/O Read Strobe(3)
(PMRD/PMWR) I/O Read/Write Signal(3)
PMBE1 O Byte Indicator
PMBE0 O Nibble or Byte Indicator
PMACK1 I Acknowledgment Signal 1
PMACK2 I Acknowledgment Signal 2
Note 1: These pins are implemented in 80-pin and 100-pin devices only.
2: These pins are implemented in 100-pin devices only.
3: Signal function depends on the setting of the MODE<1:0> and SM bits (PMCON1<9:8> and PMCSxCF<8>).
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REGISTER 20-1: PMCON1: EPMP CONTROL REGISTER 1
R/W-0 U-0 R/W-0 R/W-0 R/W-0 U-0 R/W-0 R/W-0
PMPEN — PSIDL ADRMUX1 ADRMUX0 —MODE1MODE0
bit 15 bit 8
R/W-0 R/W-0 R/W-0 R/W-0 U-0 R/W-0 R/W-0 R/W-0
CSF1 CSF0 ALP ALMODE — BUSKEEP IRQM1 IRQM0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 PMPEN: Parallel Master Port Enable bit
1 = EPMP is enabled
0 = EPMP is disabled
bit 14 Unimplemented: Read as ‘0’
bit 13 PSIDL: Stop in Idle Mode bit
1 = Discontinue module operation when device enters Idle mode
0 = Continue module operation in Idle mode
bit 12-11 ADRMUX<1:0>: Address/Data Multiplexing Selection bits
11 = Lower address bits are multiplexed with data bits using 3 address phases
10 = Lower address bits are multiplexed with data bits using 2 address phases
01 = Lower address bits are multiplexed with data bits using 1 address phase
00 = Address and data appear on separate pins
bit 10 Unimplemented: Read as ‘0’
bit 9-8 MODE<1:0>: Parallel Port Mode Select bits
11 = Master mode
10 = Enhanced PSP; pins used are PMRD, PMWR, PMCS, PMD<7:0> and PMA<1:0>
01 = Buffered PSP; pins used are PMRD, PMWR, PMCS and PMD<7:0>
00 = Legacy Parallel Slave Port; PMRD, PMWR, PMCS and PMD<7:0> pins are used
bit 7-6 CSF<1:0>: Chip Select Function bits
11 = Reserved
10 = PMA<15> is used for Chip Select 2, PMA<14> is used for Chip Select 1
01 = PMA<15> is used for Chip Select 2, PMCS1 is used for Chip Select 1
00 = PMCS2 is used for Chip Select 2, PMCS1 is used for Chip Select 1
bit 5 ALP: Address Latch Polarity bit
1 = Active-high (PMALL, PMALH and PMALU)
0 = Active-low (PMALL, PMALH and PMALU)
bit 4 ALMODE: Address Latch Strobe Mode bit
1 = Enable “smart” address strobes (each address phase is only present if the current access would
cause a different address in the latch than the previous address)
0 = Disable “smart” address strobes
bit 3 Unimplemented: Read as ‘0’
bit 2 BUSKEEP: Bus Keeper bit
1 = Data bus keeps its last value when not actively being driven
0 = Data bus is in a high-impedance state when not actively being driven
bit 1-0 IRQM<1:0>: Interrupt Request Mode bits
11 = Interrupt is generated when Read Buffer 3 is read or Write Buffer 3 is written (Buffered PSP mode),
or on a read or write operation when PMA<1:0> = 11 (Addressable PSP mode only)
10 = Reserved
01 = Interrupt is generated at the end of a read/write cycle
00 = No interrupt is generated
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DS39996F-page 256 2010-2011 Microchip Technology Inc.
REGISTER 20-2: PMCON2: EPMP CONTROL REGISTER 2
R-0, HSC U-0 R/C-0, HS R/C-0, HS U-0 U-0 U-0 U-0
BUSY —ERROR TIMEOUT ————
bit 15 bit 8
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
RADDR23(1)RADDR22(1)RADDR21(1)RADDR20(1)RADDR19(1)RADDR18(1)RADDR17(1)RADDR16(1)
bit 7 bit 0
Legend: HS = Hardware Settable bit HSC = Hardware Settable/Clearable bit
R = Readable bit W = Writable bit U = Unimplemented, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 BUSY: Busy bit (Master mode only)
1 = Port is busy
0 = Port is not busy
bit 14 Unimplemented: Read as ‘0’
bit 13 ERROR: Error bit
1 = Transaction error (illegal transaction was requested)
0 = Transaction completed successfully
bit 12 TIMEOUT: Time-out bit
1 = Transaction timed out
0 = Transaction completed successfully
bit 11-8 Unimplemented: Read as ‘0’
bit 7-0 RADDR<23:16>: Parallel Master Port Reserved Address Space bits(1)
Note 1: If RADDR<23:16> = 00000000, then the last EDS address for Chip Select 2 will be FFFFFFh.
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REGISTER 20-3: PMCON3: EPMP CONTROL REGISTER 3
R/W-0 R/W-0 R/W-0 R/W-0 U-0 R/W-0 R/W-0 R/W-0
PTWREN PTRDEN PTBE1EN PTBE0EN — AWAITM1 AWAITM0 AWAITE
bit 15 bit 8
U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
—PTEN22
(1)PTEN21(1)PTEN20(1)PTEN19(1)PTEN18(1)PTEN17(1)PTEN16(1)
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 PTWREN: Write/Enable Strobe Port Enable bit
1 = PMWR/PMENB port is enabled
0 = PMWR/PMENB port is disabled
bit 14 PTRDEN: Read/Write Strobe Port Enable bit
1 = PMRD/PMWR port is enabled
0 = PMRD/PMWR port is disabled
bit 13 PTBE1EN: High Nibble/Byte Enable Port Enable bit
1 = PMBE1 port is enabled
0 = PMBE1 port is disabled
bit 12 PTBE0EN: Low Nibble/Byte Enable Port Enable bit
1 = PMBE0 port is enabled
0 = PMBE0 port is disabled
bit 11 Unimplemented: Read as ‘0’
bit 10-9 AWAITM<1:0>: Address Latch Strobe Wait States bits
11 = Wait of 3½ TCY
10 = Wait of 2½ TCY
01 = Wait of 1½ TCY
00 = Wait of ½ TCY
bit bit 8 AWAITE: Address Hold After Address Latch Strobe Wait States bits
1 = Wait of 1¼ T
CY
0 = Wait of ¼ TCY
bit 7 Unimplemented: Read as ‘0’
bit 6-0 PTEN<22:16>: EPMP Address Port Enable bits(1)
1 = PMA<22:16> function as EPMP address lines
0 = PMA<22:16> function as port I/Os
Note 1: These bits are not available in 80 and 64-pin devices (PIC24FJXXXGA306, PIC24FJXXXGA308).
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DS39996F-page 258 2010-2011 Microchip Technology Inc.
REGISTER 20-4: PMCON4: EPMP CONTROL REGISTER 4
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
PTEN15 PTEN14 PTEN13 PTEN12 PTEN11 PTEN10 PTEN9 PTEN8
bit 15 bit 8
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
PTEN7 PTEN6 PTEN5 PTEN4 PTEN3 PTEN2 PTEN1 PTEN0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 PTEN15: PMA15 Port Enable bit
1 = PMA15 functions as either Address Line 15 or Chip Select 2
0 = PMA15 functions as port I/O
bit 14 PTEN14: PMA14 Port Enable bit
1 = PMA14 functions as either Address Line 14 or Chip Select 1
0 = PMA14 functions as port I/O
bit 13-3 PTEN<13:3>: EPMP Address Port Enable bits
1 = PMA<13:3> function as EPMP address lines
0 = PMA<13:3> function as port I/Os
bit 2-0 PTEN<2:0>: PMALU/PMALH/PMALL Strobe Enable bits
1 = PMA<2:0> function as either address lines or address latch strobes
0 = PMA<2:0> function as port I/Os
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REGISTER 20-5: PMCSxCF: CHIP SELECT x CONFIGURATION REGISTER
R/W-0 R/W-0 R/W-0 R/W-0 U-0 R/W-0 R/W-0 R/W-0
CSDIS CSP CSPTEN BEP — WRSP RDSP SM
bit 15 bit 8
R/W-0 R/W-0 R/W-0 U-0 U-0 U-0 U-0 U-0
ACKP PTSZ1 PTSZ0 — — — — —
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 CSDIS: Chip Select x Disable bit
1 = Disable the Chip Select x functionality
0 = Enable the Chip Select x functionality
bit 14 CSP: Chip Select x Polarity bit
1 = Active-high (PMCSx)
0 =Active-low (PMCSx
)
bit 13 CSPTEN: PMCSx Port Enable bit
1 = PMCSx port is enabled
0 = PMCSx port is disabled
bit 12 BEP: Chip Select x Nibble/Byte Enable Polarity bit
1 = Nibble/Byte enable is active-high (PMBE0, PMBE1)
0 = Nibble/Byte enable is active-low (PMBE0, PMBE1)
bit 11 Unimplemented: Read as ‘0’
bit 10 WRSP: Chip Select x Write Strobe Polarity bit
For Slave modes and Master mode when SM = 0:
1 = Write strobe is active-high (PMWR)
0 = Write strobe is active-low (PMWR)
For Master mode when SM = 1:
1 = Enable strobe is active-high (PMENB)
0 = Enable strobe is active-low (PMENB)
bit 9 RDSP: Chip Select x Read Strobe Polarity bit
For Slave modes and Master mode when SM = 0:
1 = Read strobe is active-high (PMRD)
0 = Read strobe is active-low (PMRD)
For Master mode when SM = 1:
1 = Read/write strobe is active-high (PMRD/PMWR)
0 = Read/Write strobe is active-low (PMRD/PMWR)
bit 8 SM: Chip Select x Strobe Mode bit
1 = Read/write and enable strobes (PMRD/PMWR and PMENB)
0 = Read and write strobes (PMRD and PMWR)
bit 7 ACKP: Chip Select x Acknowledge Polarity bit
1 = ACK is active-high (PMACK1)
0 = ACK is active-low (PMACK1)
bit 6-5 PTSZ<1:0>: Chip Select x Port Size bits
11 = Reserved
10 = 16-bit port size (PMD<15:0>)
01 = 4-bit port size (PMD<3:0>)
00 = 8-bit port size (PMD<7:0>)
bit 4-0 Unimplemented: Read as ‘0’
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REGISTER 20-6: PMCSxBS: CHIP SELECT x BASE ADDRESS REGISTER(2)
R/W(1)R/W(1)R/W(1)R/W(1)R/W(1)R/W(1)R/W(1)R/W(1)
BASE23 BASE22 BASE21 BASE20 BASE19 BASE18 BASE17 BASE16
bit 15 bit 8
R/W(1)U-0 U-0 U-0 U-0 U-0 U-0 U-0
BASE15 — — — — — — —
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-8 BASE<23:15>: Chip Select x Base Address bits(1)
bit 6-0 Unimplemented: Read as ‘0’
Note 1: The value at POR is 0080h for PMCS1BS and 0880h for PMCS2BS.
2: If the whole PMCS2BS register is written together as 0x0000, then the last EDS address for the Chip
Select 1 will be FFFFFFh. In this case, Chip Select 2 should not be used. PMCS1BS has no such feature.
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REGISTER 20-7: PMCSxMD: CHIP SELECT x MODE REGISTER
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 U-0 U-0 U-0
ACKM1 ACKM0 AMWAIT2 AMWAIT1 AMWAIT0 — — —
bit 15 bit 8
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
DWAITB1 DWAITB0 DWAITM3 DWAITM2 DWAITM1 DWAITM0 DWAITE1 DWAITE0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-14 ACKM<1:0>: Chip Select x Acknowledge Mode bits
11 = Reserved
10 = PMACKx is used to determine when a read/write operation is complete
01 = PMACKx is used to determine when a read/write operation is complete with time-out
(If DWAITM<3:0> = 0000, the maximum time-out is 255 TCY or else it is DWAITM<3:0> cycles.)
00 = PMACKx is not used
bit 13-11 AMWAIT<2:0>: Chip Select x Alternate Master Wait States bits
111 = Wait of 10 alternate master cycles
. . .
001 = Wait of 4 alternate master cycles
000 = Wait of 3 alternate master cycles
bit 10-8 Unimplemented: Read as ‘0’
bit 7-6 DWAITB<1:0>: Chip Select x Data Setup Before Read/Write Strobe Wait States bits
11 = Wait of 3¼ T
CY
10 = Wait of 2¼ TCY
01 = Wait of 1¼ TCY
00 = Wait of ¼ TCY
bit 5-2 DWAITM<3:0>: Chip Select x Data Read/Write Strobe Wait States bits
For Write Operations:
1111 = Wait of 15½ TCY
. . .
0001 = Wait of 1½ T
CY
0000 = Wait of ½ TCY
For Read Operations:
1111 = Wait of 15¾ TCY
. . .
0001 = Wait of 1¾ T
CY
0000 = Wait of ¾ TCY
bit 1-0 DWAITE<1:0>: Chip Select x Data Hold After Read/Write Strobe Wait States bits
For Write Operations:
11 = Wait of 3¼ TCY
10 = Wait of 2¼ TCY
01 = Wait of 1¼ TCY
00 = Wait of ¼ TCY
For Read Operations:
11 = Wait of 3 TCY
10 = Wait of 2 TCY
01 = Wait of 1 TCY
00 = Wait of 0 TCY
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REGISTER 20-8: PMSTAT: EPMP STATUS REGISTER (SLAVE MODE ONLY)
R-0, HSC R/W-0 HS U-0 U-0 R-0, HSC R-0, HSC R-0, HSC R-0, HSC
IBF IBOV ——IB3F
(1)IB2F(1)IB1F(1)IB0F(1)
bit 15 bit 8
R-1, HSC R/W-0 HS U-0 U-0 R-1, HSC R-1, HSC R-1, HSC R-1, HSC
OBE OBUF —— OB3E OB2E OB1E OB0E
bit 7 bit 0
Legend: HS = Hardware Settable bit HSC = Hardware Settable/Clearable bit
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 IBF: Input Buffer Full Status bit
1 = All writable Input Buffer registers are full
0 = Some or all of the writable Input Buffer registers are empty
bit 14 IBOV: Input Buffer Overflow Status bit
1 = A write attempt to a full Input register occurred (must be cleared in software)
0 = No overflow occurred
bit 13-12 Unimplemented: Read as ‘0’
bit 11-8 IB3F:IB0F: Input Buffer x Status Full bits(1)
1 = Input buffer contains unread data (reading the buffer will clear this bit)
0 = Input buffer does not contain unread data
bit 7 OBE: Output Buffer Empty Status bit
1 = All readable Output Buffer registers are empty
0 = Some or all of the readable Output Buffer registers are full
bit 6 OBUF: Output Buffer Underflow Status bit
1 = A read occurred from an empty output register (must be cleared in software)
0 = No underflow occurred
bit 5-4 Unimplemented: Read as ‘0’
bit 3-0 OB3E:OB0E: Output Buffer x Status Empty bit
1 = Output buffer is empty (writing data to the buffer will clear this bit)
0 = Output buffer contains untransmitted data
Note 1: Even though an individual bit represents the byte in the buffer, the bits corresponding to the word (Byte 0
and 1, or Byte 2 and 3) get cleared, even on byte reading.
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REGISTER 20-9: PADCFG1: PAD CONFIGURATION CONTROL REGISTER
U-0 U-0 U-0 U-0 U-0 U-0 U-0 U-0
— — — — — — — —
bit 15 bit 8
U-0 U-0 U-0 U-0 U-0 U-0 U-0 R/W-0
— — — — — — —PMPTTL
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-1 Unimplemented: Read as ‘0’
bit 0 PMPTTL: EPMP Module TTL Input Buffer Select bit
1 = EPMP module inputs (PMDx, PMCS1) use TTL input buffers
0 = EPMP module inputs use Schmitt Trigger input buffers
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NOTES:
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21.0 LIQ UID CRYSTAL DISPLAY
(LCD) CONTROLLER
The Liquid Crystal Display (LCD) Controller generates
the data and timing control required to directly drive a
static or multiplexed LCD panel. In 100-pin devices
(PIC24FJXXXGA310), the module can drive panels of
up to eight commons and up to 60 segments when 5 to
8 commons are used, or up to 64 segments when 1 to
4 commons are used.
The module has these features:
• Direct driving of LCD panel
• Three LCD clock sources with selectable prescaler
• Up to eight commons:
- Static (One common)
- 1/2 multiplex (two commons)
- 1/3 multiplex (three commons)
- 1/8 multiplex (eight commons)
• Ability to drive from 30 (in 64-pin devices) to
64 (100-pin) segments, depending on the
Multiplexing mode selected
• Static, 1/2 or 1/3 LCD bias
• On-chip bias generator with dedicated charge
pump to support a range of fixed and variable bias
options
• Internal resistors for bias voltage generation
• Software contrast control for LCD using internal
biasing
A simplified block diagram of the module is shown in
Figure 21-1.
FIGURE 21-1: LCD CONTROLLER MODULE BLOCK DIAGRAM
Note: This data sheet summarizes the features of
this group of PIC24F devices. It is not
intended to be a comprehensive reference
source. For more information, refer to the
“PIC24F Family Reference Manual”,
Section 52. “Liquid Crystal Display
(LCD)” (DS39740). The information in this
data sheet supersedes the information in
the FRM.
COM<7:0>
Timing Contro l
Data Bus
SOSC
FRC Oscillator
LPRC Oscillator
512
to
64
MUX SEG<63:0>
To I/O Pins
32 x 16 (= 8 x 64)
LCD DATA
LCDCON
LCDPS
LCDSEx
LCDDATA0
LCDDATA1
LCDDATA30
LCDDATA31
.
.
.
LCD Bias Generation
LCD Clock
Source Select LCD
Charge Pump
64
8
Bias
Voltage
16
(Secondary Oscillator)
Resistor Ladder
LCDREF
LCDREG
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21.1 Registers
The LCD controller has up to 40 registers:
• LCD Control Register (LCDCON)
• LCD Charge Pump Control Register (LCDREG)
• LCD Phase Register (LCDPS)
• LCD Voltage Ladder Control Register (LCDREF)
• Four LCD Segment Enable Registers
(LCDSE3:LCDSE0)
• Up to 32 LCD Data Registers
(LCDDATA31:LCDDATA0)
REGISTER 21-1: LCDCON: LCD CONTROL REGISTER
R/W-0 U-0 R/W-0 U-0 U-0 U-0 U-0 U-0
LCDEN — LCDSIDL — — — — —
bit 15 bit 8
U-0 R/W-0 R/C-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
— SLPEN WERR CS1 CS0 LMUX2 LMUX1 LMUX0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 LCDEN: LCD Driver Enable bit
1 = LCD driver module is enabled
0 = LCD driver module is disabled
bit 14 Unimplemented: Read as ‘0’
bit 13 LCDSIDL: Stop LCD Drive in CPU Idle Mode Control bit
1 = LCD driver Halts in CPU Idle mode
0 = LCD driver continues to operate in CPU Idle mode
bit 12-7 Unimplemented: Read as ‘0’
bit 6 SLPEN: LCD Driver Enable in Sleep mode bit
1 = LCD driver module is disabled in Sleep mode
0 = LCD driver module is enabled in Sleep mode
bit 5 WERR: LCD Write Failed Error bit
1 = LCDDATAx register is written while WA (LCDPS<4>) = 0 (must be cleared in software)
0 = No LCD write error
bit 4-3 CS<1:0>: Clock Source Select bits
00 =FRC
01 =LPRC
1x =SOSC
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bit 2-0 LMUX<2:0>: Commons Select bits
REGISTER 21-1: LCDCON: LCD CONTROL REGISTER (CONTINUED)
LMUX<2:0> Multiplex Bias
111 1/8 MUX (COM<7:0>) 1/3
110 1/7 MUX (COM<6:0>) 1/3
101 1/6 MUX (COM<5:0>) 1/3
100 1/5 MUX (COM<4:0>) 1/3
011 1/4 MUX (COM<3:0>) 1/3
010 1/3 MUX (COM<2:0>) 1/2 or 1/3
001 1/2 MUX (COM<1:0>) 1/2 or 1/3
000 Static (COM0) Static
Note: For multiplex above 4 commons, COM4, COM5, COM6 and COM7 also have segment
functionality. Therefore, if the COM is enabled in multiplexing, the segment will not be
available on that pin.
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REGISTER 21-2: LCDREG: LCD CHARGE PUMP CONTROL REGISTER
RW-0 U-0 U-0 U-0 U-0 U-0 U-0 U-0
CPEN(1)— — — — — — —
bit 15 bit 8
U-0 U-0 RW-1 RW-1 RW-1 RW-1 RW-0 RW-0
— — BIAS2 BIAS1 BIAS0 MODE13 CKSEL1 CKSEL0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 CPEN: 3.6V Charge Pump Enable bit(1)
1 = The regulator generates the highest (3.6V) voltage
0 = Highest voltage in the system is supplied externally (AVDD)
bit 14-6 Unimplemented: Read as ‘0’
bit 5-3 BIAS<2:0>: Regulator Voltage Output Control bits
111 = 3.60V peak (offset on LCDBIAS0 of 0V)
110 = 3.47V peak (offset on LCDBIAS0 of 0.13V)
101 = 3.34V peak (offset on LCDBIAS0 of 0.26V)
100 = 3.21V peak (offset on LCDBIAS0 of 0.39V)
011 = 3.08V peak (offset on LCDBIAS0 of 0.52V)
010 = 2.95V peak (offset on LCDBIAS0 of 0.65V)
001 = 2.82V peak (offset on LCDBIAS0 of 0.78V)
000 = 2.69V peak (offset on LCDBIAS0 of 0.91V)
bit 2 MODE13: 1/3 LCD Bias Enable bit
1 = Regulator output supports 1/3 LCD Bias mode
0 = Regulator output supports Static LCD Bias mode
bit 1-0 CLKSEL<1:0>: Regulator Clock Select Control bits
11 = LPRC 31 kHz
10 =8 MHz FRC
01 =SOSC
00 = Disable regulator and float regulator voltage output
Note 1: When using the charge pump, the LCDBIASx pins and the VLCAP1/VLACAP2 pins should be made analog,
and the respective TRIS bits should be set as inputs.
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REGISTER 21-3: LCDPS: LCD PHASE REGISTER
U-0 U-0 U-0 U-0 U-0 U-0 U-0 U-0
— — — — — — — —
bit 15 bit 8
R/W-0 R/W-0 R-0 R-0 R/W-0 R/W-0 R/W-0 R/W-0
WFT BIASMD LCDA WA LP3 LP2 LP1 LP0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-8 Unimplemented: Read as ‘0’
bit 7 WFT: Waveform Type Select bit
1 = Type-B waveform (phase changes on each frame boundary)
0 = Type-A waveform (phase changes within each common type)
bit 6 BIASMD: Bias Mode Select bit
When LMUX<2:0> = 000 or 011 through 111:
0 = Static Bias mode (do not set this bit to ‘1’)
When LMUX<2:0> = 001 or 010:
1 = 1/2 Bias mode
0 = 1/3 Bias mode
bit 5 LCDA: LCD Active Status bit
1 = LCD driver module is active
0 = LCD driver module is inactive
bit 4 WA: LCD Write Allow Status bit
1 = Write into the LCDDATAx registers is allowed
0 = Write into the LCDDATAx registers is not allowed
bit 3-0 LP<3:0>: LCD Prescaler Select bits
1111 = 1:16
1110 = 1:15
1101 = 1:14
1100 = 1:13
1011 = 1:12
1010 = 1:11
1001 = 1:10
1000 = 1:9
0111 = 1:8
0110 = 1:7
0101 = 1:6
0100 = 1:5
0011 = 1:4
0010 = 1:3
0001 = 1:2
0000 = 1:1
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REGISTER 21-4: LCDSEx: LCD SEGMENT x ENABLE REGISTER
REGISTER 21-5: LCDDATAx: LCD DATA x REGISTER
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
SE(n+15) SE(n+14) SE(n+13) SE(n+12) SE(n+11) SE(n+10) SE(n+9) SE(n+8)
bit 15 bit 8
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
SE(n+7) SE(n+6) SE(n+5) SE(n+4) SE(n+3) SE(n+2) SE(n+1) SE(n)
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7-0 SE(n + 15):SE(n): Segment Enable bits
For LCDSE0: n = 0
For LCDSE1: n = 16
For LCDSE2: n = 32
For LCDSE3: n = 48(1)
1 = Segment function of the pin is enabled, digital I/O is disabled
0 = Segment function of the pin is disabled, digital I/O is enabled
Note 1: For the SEG49 to work correctly, the JTAG needs to be disabled.
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
S(n+15)Cy S(n+14)Cy S(n+13)Cy S(n+12)Cy S(n+11)Cy S(n+10)Cy S(n+9)Cy S(n+8)Cy
bit 15 bit 8
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
S(n+7)Cy S(n+6)Cy S(n+5)Cy S(n+4)Cy S(n+3)Cy S(n+2)Cy S(n+1)Cy S(n)Cy
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-0 S(n + 15)Cy:S(n)Cy: Pixel On bits
For registers, LCDDATA0 through LCDDATA3: n = (16x), y = 0
For registers, LCDDATA4 through LCDDATA7: n = (16(x - 4)), y = 1
For registers, LCDDATA8 through LCDDATA11: n = (16(x - 8)), y = 2
For registers, LCDDATA12 through LCDDATA15: n = (16(x - 12)), y = 3
For registers, LCDDATA16 through LCDDATA19: n = (16(x-16)), y = 4
For registers, LCDDATA20 through LCDDATA23: n = (16(x - 20)), y = 5
For registers, LCDDATA24 through LCDDATA27: n = (16(x - 24)), y = 6
For registers, LCDDATA28 through LCDDATA31: n = (16(x - 28)), y = 7
1 = Pixel is on
0 = Pixel is off
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TABLE 21-1: LCDDATA REGISTERS AND BITS FOR SEGMENT AND COM COMBINATIONS
COM Lines Segments
0 to 15 16 to 31 32 to 47 48 to 64
0LCDDATA0
S00C0:S15C0
LCDDATA1
S16C0:S31C0
LCDDATA2
S32C0:S47C0
LCDDATA3
S48C0:S63C0
1LCDDATA4
S00C1:S15C1
LCDDATA5
S16C1:S31C1
LCDDATA6
S32C1:S47C1
LCDDATA7
S48C1:S63C1
2LCDDATA8
S00C2:S15C2
LCDDATA9
S16C2:S31C2
LCDDATA10
S32C2:S47C2
LCDDATA11
S48C2:S63C2
3LCDDATA12
S00C3:S15C3
LCDDATA13
S16C3:S31C3
LCDDATA14
S32C3:S47C3
LCDDATA15
S48C3:S63C3
4LCDDATA16
S00C4:S15C4
LCDDATA17
S16C4:S31C4
LCDDATA18
S32C4:S47C4
LCDDATA19
S48C4:S59C4
5LCDDATA20
S00C5:S15C5
LCDDATA21
S16C5:S31C5
LCDDATA22
S32C5:S47C5
LCDDATA23
S48C5:S69C5
6LCDDATA24
S00C6:S15C6
LCDDATA25
S16C6:S31C6
LCDDATA26
S32C6:S47C6
LCDDATA27
S48C6:S59C6
7LCDDATA28
S00C7:S15C7
LCDDATA29
S16C7:S31C7
LCDDATA30
S32C7:S47C7
LCDDATA31
S48C7:S59C7
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REGISTER 21-6: LCDREF: LCD REFERENCE LADDER CONTROL REGISTER
R/W-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
LCDIRE — LCDCST2 LCDCST1 LCDCST0 VLCD3PE(1)VLCD2E(1)VLCD1E(1)
bit 15 bit 8
R/W-0 R/W-0 R/W-0 R/W-0 U-0 R/W-0 R/W-0 R/W-0
LRLAP1 LRLAP0 LRLBP1 LRLBP0 — LRLAT2 LRLAT1 LRLAT0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 LCDIRE: LCD Internal Reference Enable bit
1 = Internal LCD reference is enabled and connected to the internal contrast control circuit
0 = Internal LCD reference is disabled
bit 14 Unimplemented: Read as ‘0’
bit 13-11 LCDCST<2:0>: LCD Contrast Control bits
Selects the resistance of the LCD contrast control resistor ladder:
111 = Resistor ladder is at maximum resistance (minimum contrast)
110 = Resistor ladder is at 6/7th of maximum resistance
101 = Resistor ladder is at 5/7th of maximum resistance
100 = Resistor ladder is at 4/7th of maximum resistance
011 = Resistor ladder is at 3/7th of maximum resistance
010 = Resistor ladder is at 2/7th of maximum resistance
001 = Resistor ladder is at 1/7th of maximum resistance
000 = Minimum resistance (maximum contrast); resistor ladder is shorted
bit 10 VLCD3PE: Bias 3 Pin Enable bit(1)
1 = Bias 3 level is connected to the external pin, LCDBIAS3
0 = Bias 3 level is internal (internal resistor ladder)
bit 9 VLCD2PE: Bias 2 Pin Enable bit(1)
1 = Bias 2 level is connected to the external pin, LCDBIAS2
0 = Bias 2 level is internal (internal resistor ladder)
bit 8 VLCD1PE: Bias 1 Pin Enable bit(1)
1 = Bias 1 level is connected to the external pin, LCDBIAS1
0 = Bias 1 level is internal (internal resistor ladder)
bit 7-6 LRLAP<1:0>: LCD Reference Ladder A Time Power Control bits
During Time Interval A:
11 = Internal LCD reference ladder is powered in High-Power mode
10 = Internal LCD reference ladder is powered in Medium Power mode
01 = Internal LCD reference ladder is powered in Low-Power mode
00 = Internal LCD reference ladder is powered down and unconnected
bit 5-4 LRLBP<1:0>: LCD Reference Ladder B Time Power Control bits
During Time Interval B:
11 = Internal LCD reference ladder is powered in High-Power mode
10 = Internal LCD reference ladder is powered in Medium Power mode
01 = Internal LCD reference ladder is powered in Low-Power mode
00 = Internal LCD reference ladder is powered down and unconnected
bit 3 Unimplemented: Read as ‘0’
Note 1: When using the external resistor ladder biasing, the LCDBIASx pins should be made analog and the
respective TRIS bits should be set as inputs.
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bit 2-0 LRLAT<2:0>: LCD Reference Ladder A Time Interval Control bits
Sets the number of 32 clock counts when the A Time Interval Power mode is active.
For Type-A Waveforms (WFT = 0):
111 = Internal LCD reference ladder is in A Power mode for 7 clocks and B Power mode for 9 clocks
110 = Internal LCD reference ladder is in A Power mode for 6 clocks and B Power mode for 10 clocks
101 = Internal LCD reference ladder is in A Power mode for 5 clocks and B Power mode for 11 clocks
100 = Internal LCD reference ladder is in A Power mode for 4 clocks and B Power mode for 12 clocks
011 = Internal LCD reference ladder is in A Power mode for 3 clocks and B Power mode for 13 clocks
010 = Internal LCD reference ladder is in A Power mode for 2 clocks and B Power mode for 14 clocks
001 = Internal LCD reference ladder is in A Power mode for 1 clock and B Power mode for 15 clocks
000 = Internal LCD reference ladder is always in B Power mode
For Type-B Waveforms (WFT = 1):
111 = Internal LCD reference ladder is in A Power mode for 7 clocks and B Power mode for 25 clocks
110 = Internal LCD reference ladder is in A Power mode for 6 clocks and B Power mode for 26 clocks
101 = Internal LCD reference ladder is in A Power mode for 5 clocks and B Power mode for 27 clocks
100 = Internal LCD reference ladder is in A Power mode for 4 clocks and B Power mode for 28 clocks
011 = Internal LCD reference ladder is in A Power mode for 3 clocks and B Power mode for 29 clocks
010 = Internal LCD reference ladder is in A Power mode for 2 clocks and B Power mode for 30 clocks
001 = Internal LCD reference ladder is in A Power mode for 1 clock and B Power mode for 31 clocks
000 = Internal LCD reference ladder is always in B Power mode
REGISTER 21-6: LCDREF: LCD REFERENCE LADDER CONTROL REGISTER (CONTINUED)
Note 1: When using the external resistor ladder biasing, the LCDBIASx pins should be made analog and the
respective TRIS bits should be set as inputs.
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NOTES:
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22.0 REAL-TIME CLOCK AND
CALENDAR (RTCC)
The RTCC provides the user with a Real-Time Clock
and Calendar (RTCC) function that can be calibrated.
Key features of the RTCC module are:
• Operates in Deep Sleep mode
• Selectable clock source
• Provides hours, minutes and seconds using
24-hour format
• Visibility of one half second period
• Provides calendar – weekday, date, month and
year
• Alarm-configurable for half a second, one second,
10 seconds, one minute, 10 minutes, one hour,
one day, one week, one month or one year
• Alarm repeat with decrementing counter
• Alarm with indefinite repeat chime
• Year 2000 to 2099 leap year correction
• BCD format for smaller software overhead
• Optimized for long-term battery operation
• User calibration of the 32.768 kHz clock
crystal/32K INTRC frequency with periodic
auto-adjust
• Optimized for long term battery operation
• Fractional second synchronization
• Calibration to within ±2.64 seconds error per
month
• Calibrates up to 260 ppm of crystal error
• Ability to periodically wake up external devices
without CPU intervention (external power control)
• Power control output for external circuit control
• Calibration takes effect every 15 seconds
• Runs from any one of the following:
- External Real-Time Clock (RTC) of 32.768 kHz
- Internal 31.25 kHz LPRC clock
- 50 Hz or 60 Hz external input
22.1 RTCC Source Clock
The user can select between the SOSC crystal
oscillator, LPRC internal oscillator or an external
50 Hz/60 Hz power line input as the clock reference for
the RTCC module. This gives the user an option to
trade off system cost, accuracy and power
consumption, based on the overall system needs.
FIGURE 22-1: RTCC BLOCK DIAGRAM
Note: This data sheet summarizes the features of
this group of PIC24F devices. It is not
intended to be a comprehensive reference
source. For more information on the
Real-Time Clock and Calendar, refer to the
“PIC24F Family Reference Manual”,
Section 29. “Real-Time Clock and
Calendar (RTCC)” (DS39696).
RTCC Clock Do main CPU Clock Domain
RTCC
RTCC Prescalers
RTCC Timer
Comparator
Alarm Registers with Masks
Repeat Counter
0.5 Sec
ALRMVAL
RTCVAL
ALCFGRPT
RCFGCAL
Alarm
Event
YEAR
MTHDY
WKDYHR
MINSEC
ALMTHDY
ALWDHR
ALMINSEC
RTCC
Interrupt RTCOUT<1:0>
RTCOE
10
01
00
Clock Source
1s
Pin
Alarm
Input from
SOSC/LPRC
Oscillator or
External Source
RTCC Interrupt Logic
Pulse
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22.2 RTCC Module Registers
The RTCC module registers are organized into three
categories:
• RTCC Control Registers
• RTCC Value Registers
• Alarm Value Registers
22.2.1 REGISTER MAPPING
To limit the register interface, the RTCC Timer and
Alarm Time registers are accessed through
corresponding register pointers. The RTCC Value
register window (RTCVALH and RTCVALL) uses the
RTCPTR bits (RCFGCAL<9:8>) to select the desired
Timer register pair (see Table 22-1).
By writing the RTCVALH byte, the RTCC Pointer value,
the RTCPTR<1:0> bits decrement by one until they
reach ‘00’. Once they reach ‘00’, the MINUTES and
SECONDS value will be accessible through RTCVALH
and RTCVALL until the pointer value is manually
changed.
TABLE 22-1: RTCVAL REGISTER MAPPING
The Alarm Value register window (ALRMVALH and
ALRMVALL) uses the ALRMPTR bits
(ALCFGRPT<9:8>) to select the desired Alarm register
pair (see Table 22-2).
By writing the ALRMVALH byte, the Alarm Pointer
value, ALRMPTR<1:0> bits, decrement by one until
they reach ‘00’. Once they reach ‘00’, the ALRMMIN
and ALRMSEC value will be accessible through
ALRMVALH and ALRMVALL until the pointer value is
manually changed.
TABLE 22-2: ALRMVAL REGISTER
MAPPING
Considering that the 16-bit core does not distinguish
between 8-bit and 16-bit read operations, the user must
be aware that when reading either the ALRMVALH or
ALRMVALL bytes, the ALRMPTR<1:0> value will be
decremented. The same applies to the RTCVALH or
RTCVALL bytes with the RTCPTR<1:0> being
decremented.
22.2.2 WRITE LOCK
In order to perform a write to any of the RTCC Timer
registers, the RTCWREN bit (RCFGCAL1<13>) must
be set (see Example 22-1).
22.2.3 SELECTING RTCC CLOCK SOURCE
The clock source for the RTCC module can be selected
using the RTCLK<1:0> bits in the RTCPWC register.
When the bits are set to ‘00’, the Secondary Oscillator
(SOSC) is used as the reference clock and when the bits
are ‘01’, LPRC is used as the reference clock. When
RTCLK<1:0> = 10 and 11, the external power line
(50 Hz and 60 Hz) is used as the clock source.
EXAMPLE 22-1: SETTING THE RTCWREN BIT
RTCPTR<1:0> RTCC Value Register Window
RTCVAL<15:8> RTCVAL<7:0>
00 MINUTES SECONDS
01 WEEKDAY HOURS
10 MONTH DAY
11 — YEAR
ALRMPTR
<1:0>
Alarm Value Register Window
ALRMVAL<15:8> ALRMVAL<7:0>
00 ALRMMIN ALRMSEC
01 ALRMWD ALRMHR
10 ALRMMNTH ALRMDAY
11 ——
Note: This only applies to read operations and
not write operations.
Note: To avoid accidental writes to the timer, it is
recommended that the RTCWREN bit
(RCFGCAL1<13>) is kept clear at any
other time. For the RTCWREN bit to be
set, there is only one instruction cycle time
window allowed between the 55h/AA
sequence and the setting of RTCWREN;
therefore, it is recommended that code
follow the procedure in Example 22-1.
asm volatile(“push w7”);
asm volatile(“push w8”);
asm volatile(“disi #5”);
asm volatile(“mov #0x55, w7”);
asm volatile(“mov w7, _NVMKEY”);
asm volatile(“mov #0xAA, w8”);
asm volatile(“mov w8, _NVMKEY”);
asm volatile(“bset _RCFGCAL1, #13”); //set the RTCWREN bit
asm volatile(“pop w8”);
asm volatile(“pop w7”);
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22.3 Registers
22.3.1 RTCC CONTROL REGISTERS
REGISTER 22-1: RCFGCAL: RTCC CALIBRATION/CONFIGURATION REGISTER(1)
R/W-0 U-0 R/W-0 R-0, HSC R-0, HSC R/W-0 R/W-0 R/W-0
RTCEN(2)— RTCWREN RTCSYNC HALFSEC(3)RTCOE RTCPTR1 RTCPTR0
bit 15 bit 8
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
CAL7 CAL6 CAL5 CAL4 CAL3 CAL2 CAL1 CAL0
bit 7 bit 0
Legend: HSC = Hardware Settable/Clearable bit
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 RTCEN: RTCC Enable bit(2)
1 = RTCC module is enabled
0 = RTCC module is disabled
bit 14 Unimplemented: Read as ‘0’
bit 13 RTCWREN: RTCC Value Registers Write Enable bit
1 = RTCVALH and RTCVALL registers can be written to by the user
0 = RTCVALH and RTCVALL registers are locked out from being written to by the user
bit 12 RTCSYNC: RTCC Value Registers Read Synchronization bit
1 = RTCVALH, RTCVALL and ALCFGRPT registers can change while reading due to a rollover ripple
resulting in an invalid data read. If the register is read twice and results in the same data, the data
can be assumed to be valid.
0 = RTCVALH, RTCVALL or ALCFGRPT registers can be read without concern over a rollover ripple
bit 11 HALFSEC: Half Second Status bit(3)
1 = Second half period of a second
0 = First half period of a second
bit 10 RTCOE: RTCC Output Enable bit
1 = RTCC output is enabled
0 = RTCC output is disabled
bit 9-8 RTCPTR<1:0>: RTCC Value Register Window Pointer bits
Points to the corresponding RTCC Value registers when reading the RTCVALH and RTCVALL registers.
The RTCPTR<1:0> value decrements on every read or write of RTCVALH until it reaches ‘00’.
RTCVAL<15:8>:
11 = Reserved
10 = MONTH
01 = WEEKDAY
00 = MINUTES
RTCVAL<7:0>:
11 = YEAR
10 = DAY
01 = HOURS
00 = SECONDS
Note 1: The RCFGCAL register is only affected by a POR.
2: A write to the RTCEN bit is only allowed when RTCWREN = 1.
3: This bit is read-only; it is cleared to ‘0’ on a write to the lower half of the MINSEC register.
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bit 7-0 CAL<7:0>: RTC Drift Calibration bits
01111111 = Maximum positive adjustment; adds 127 RTC clock pulses every 15 seconds
.
.
.
01111111 = Minimum positive adjustment; adds 1 RTC clock pulse every 15 seconds
00000000 = No adjustment
11111111 = Minimum negative adjustment; subtracts 1 RTC clock pulse every 15 seconds
.
.
.
10000000 = Maximum negative adjustment; subtracts 128 RTC clock pulses every 15 seconds
REGISTER 22-1: RCFGCAL: RTCC CALIBRATION/CONFIGURATION REGISTER(1) (CONTINUED)
Note 1: The RCFGCAL register is only affected by a POR.
2: A write to the RTCEN bit is only allowed when RTCWREN = 1.
3: This bit is read-only; it is cleared to ‘0’ on a write to the lower half of the MINSEC register.
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REGISTER 22-2: RTCPWC: RTCC POWER CONTROL REGISTER(1)
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
PWCEN PWCPOL PWCPRE PWSPRE RTCLK1(2)RTCLK0(2)RTCOUT1 RTCOUT0
bit 15 bit 8
U-0 U-0 U-0 U-0 U-0 U-0 U-0 U-0
— — — — — — — —
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 PWCEN: Power Control Enable bit
1 = Power control is enabled
0 = Power control is disabled
bit 14 PWCPOL: Power Control Enable bit
1 = Power control is enabled
0 = Power control is disabled
bit 13 PWCPRE: Power Control/Stability Prescaler bits
1 = PWC stability window clock is divide-by-2 of source RTCC clock
0 = PWC stability window clock is divide-by-1 of source RTCC clock
bit 12 PWSPRE: Power Control Sample Prescaler bits
1 = PWC sample window clock is divide-by-2 of source RTCC clock
0 = PWC sample window clock is divide-by-1 of source RTCC clock
bit 11-10 RTCLK<1:0>: RTCC Clock Source Select bits(2)
11 = External power line (60 Hz)
10 = External power line source (50 Hz)
01 = Internal LPRC Oscillator
00 = External Secondary Oscillator (SOSC)
bit 9-8 RTCOUT<1:0>: RTCC Output Source Select bits
11 = Power control
10 = RTCC clock
01 = RTCC seconds clock
00 = RTCC alarm pulse
bit 7-0 Unimplemented: Read as ‘0’
Note 1: The RTCPWC register is only affected by a POR.
2: When a new value is written to these register bits, the lower half of the MINSEC register should also be
written to properly reset the clock prescalers in the RTCC.
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REGISTER 22-3: ALCFGRPT: ALARM CONFIGURATION REGISTER
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
ALRMEN CHIME AMASK3 AMASK2 AMASK1 AMASK0 ALRMPTR1 ALRMPTR0
bit 15 bit 8
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
ARPT7 ARPT6 ARPT5 ARPT4 ARPT3 ARPT2 ARPT1 ARPT0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 ALRMEN: Alarm Enable bit
1 = Alarm is enabled (cleared automatically after an alarm event whenever ARPT<7:0> = 00h and
CHIME = 0)
0 = Alarm is disabled
bit 14 CHIME: Chime Enable bit
1 = Chime is enabled; ARPT<7:0> bits are allowed to roll over from 00h to FFh
0 = Chime is disabled; ARPT<7:0> bits stop once they reach 00h
bit 13-10 AMASK<3:0>: Alarm Mask Configuration bits
0000 = Every half second
0001 = Every second
0010 = Every 10 seconds
0011 = Every minute
0100 = Every 10 minutes
0101 = Every hour
0110 = Once a day
0111 = Once a week
1000 = Once a month
1001 = Once a year (except when configured for February 29th, once every 4 years)
101x = Reserved – do not use
11xx = Reserved – do not use
bit 9-8 ALRMPTR<1:0>: Alarm Value Register Window Pointer bits
Points to the corresponding Alarm Value registers when reading the ALRMVALH and ALRMVALL registers.
The ALRMPTR<1:0> value decrements on every read or write of ALRMVALH until it reaches ‘00’.
ALRMVAL<15:8>:
00 = ALRMMIN
01 = ALRMWD
10 = ALRMMNTH
11 = PWCSTAB
ALRMVAL<7:0>:
00 = ALRMSEC
01 = ALRMHR
10 = ALRMDAY
11 = PWCSAMP
bit 7-0 ARPT<7:0>: Alarm Repeat Counter Value bits
11111111 = Alarm will repeat 255 more times
.
.
.
00000000 = Alarm will not repeat
The counter decrements on any alarm event; it is prevented from rolling over from 00h to FFh unless
CHIME = 1.
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22.3.2 RTCVAL REGISTER MAPPINGS
REGISTER 22-4: YEAR: YEAR VALUE REGISTER(1)
U-0 U-0 U-0 U-0 U-0 U-0 U-0 U-0
— — — — — — — —
bit 15 bit 8
R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x
YRTEN3 YRTEN2 YRTEN2 YRTEN1 YRONE3 YRONE2 YRONE1 YRONE0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-8 Unimplemented: Read as ‘0’
bit 7-4 YRTEN<3:0>: Binary Coded Decimal Value of Year’s Tens Digit bits
Contains a value from 0 to 9.
bit 3-0 YRONE<3:0>: Binary Coded Decimal Value of Year’s Ones Digit bits
Contains a value from 0 to 9.
Note 1: A write to the YEAR register is only allowed when RTCWREN = 1.
REGISTER 22-5: MTHDY: MONTH AND DAY VALUE REGISTER(1)
U-0 U-0 U-0 R/W-x R/W-x R/W-x R/W-x R/W-x
— — —
MTHTEN0 MTHONE3 MTHONE2 MTHONE1 MTHONE0
bit 15 bit 8
U-0 U-0 R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x
— —
DAYTEN1 DAYTEN0 DAYONE3 DAYONE2 DAYONE1 DAYONE0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-13 Unimplemented: Read as ‘0’
bit 12 MTHTEN0: Binary Coded Decimal Value of Month’s Tens Digit bit
Contains a value of ‘0’ or ‘1’.
bit 11-8 MTHONE<3:0>: Binary Coded Decimal Value of Month’s Ones Digit bits
Contains a value from 0 to 9.
bit 7-6 Unimplemented: Read as ‘0’
bit 5-4 DAYTEN<1:0>: Binary Coded Decimal Value of Day’s Tens Digit bits
Contains a value from 0 to 3.
bit 3-0 DAYONE<3:0>: Binary Coded Decimal Value of Day’s Ones Digit bits
Contains a value from 0 to 9.
Note 1: A write to this register is only allowed when RTCWREN = 1.
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REGISTER 22-6: WKDYHR: WEEKDAY AND HOURS VALUE REGISTER(1)
U-0 U-0 U-0 U-0 U-0 R/W-x R/W-x R/W-x
— — — — — WDAY2 WDAY1 WDAY0
bit 15 bit 8
U-0 U-0 R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x
—— HRTEN1 HRTEN0 HRONE3 HRONE2 HRONE1 HRONE0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-11 Unimplemented: Read as ‘0’
bit 10-8 WDAY<2:0>: Binary Coded Decimal Value of Weekday Digit bits
Contains a value from 0 to 6.
bit 7-6 Unimplemented: Read as ‘0’
bit 5-4 HRTEN<1:0>: Binary Coded Decimal Value of Hour’s Tens Digit bits
Contains a value from 0 to 2.
bit 3-0 HRONE<3:0>: Binary Coded Decimal Value of Hour’s Ones Digit bits
Contains a value from 0 to 9.
Note 1: A write to this register is only allowed when RTCWREN = 1.
REGISTER 22-7: MINSEC: MINUTES AND SECONDS VALUE REGISTER
U-0 R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x
— MINTEN2 MINTEN1 MINTEN0 MINONE3 MINONE2 MINONE1 MINONE0
bit 15 bit 8
U-0 R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x
— SECTEN2 SECTEN1 SECTEN0 SECONE3 SECONE2 SECONE1 SECONE0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 Unimplemented: Read as ‘0’
bit 14-12 MINTEN<2:0>: Binary Coded Decimal Value of Minute’s Tens Digit bits
Contains a value from 0 to 5.
bit 11-8 MINONE<3:0>: Binary Coded Decimal Value of Minute’s Ones Digit bits
Contains a value from 0 to 9.
bit 7 Unimplemented: Read as ‘0’
bit 6-4 SECTEN<2:0>: Binary Coded Decimal Value of Second’s Tens Digit bits
Contains a value from 0 to 5.
bit 3-0 SECONE<3:0>: Binary Coded Decimal Value of Second’s Ones Digit bits
Contains a value from 0 to 9.
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22.3.3 ALRMVAL REGISTER MAPPINGS
REGISTER 22-8: ALMTHDY: ALARM MONTH AND DAY VALUE REGISTER(1)
U-0 U-0 U-0 R/W-x R/W-x R/W-x R/W-x R/W-x
— — —
MTHTEN0 MTHONE3 MTHONE2 MTHONE1 MTHONE0
bit 15 bit 8
U-0 U-0 R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x
— —
DAYTEN1 DAYTEN0 DAYONE3 DAYONE2 DAYONE1 DAYONE0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-13 Unimplemented: Read as ‘0’
bit 12 MTHTEN0: Binary Coded Decimal Value of Month’s Tens Digit bit
Contains a value of ‘0’ or ‘1’.
bit 11-8 MTHONE<3:0>: Binary Coded Decimal Value of Month’s Ones Digit bits
Contains a value from 0 to 9.
bit 7-6 Unimplemented: Read as ‘0’
bit 5-4 DAYTEN<1:0>: Binary Coded Decimal Value of Day’s Tens Digit bits
Contains a value from 0 to 3.
bit 3-0 DAYONE<3:0>: Binary Coded Decimal Value of Day’s Ones Digit bits
Contains a value from 0 to 9.
Note 1: A write to this register is only allowed when RTCWREN = 1.
REGISTER 22-9: ALWDHR: ALARM WEEKDAY AND HOURS VALUE REGISTER(1)
U-0 U-0 U-0 U-0 U-0 R/W-x R/W-x R/W-x
— — — — — WDAY2 WDAY1 WDAY0
bit 15 bit 8
U-0 U-0 R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x
—— HRTEN1 HRTEN0 HRONE3 HRONE2 HRONE1 HRONE0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-11 Unimplemented: Read as ‘0’
bit 10-8 WDAY<2:0>: Binary Coded Decimal Value of Weekday Digit bits
Contains a value from 0 to 6.
bit 7-6 Unimplemented: Read as ‘0’
bit 5-4 HRTEN<1:0>: Binary Coded Decimal Value of Hour’s Tens Digit bits
Contains a value from 0 to 2.
bit 3-0 HRONE<3:0>: Binary Coded Decimal Value of Hour’s Ones Digit bits
Contains a value from 0 to 9.
Note 1: A write to this register is only allowed when RTCWREN = 1.
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REGISTER 22-10: ALMINSEC: ALARM MINUTES AND SECONDS VALUE REGISTER
U-0 R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x
— MINTEN2 MINTEN1 MINTEN0 MINONE3 MINONE2 MINONE1 MINONE0
bit 15 bit 8
U-0 R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x
— SECTEN2 SECTEN1 SECTEN0 SECONE3 SECONE2 SECONE1 SECONE0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 Unimplemented: Read as ‘0’
bit 14-12 MINTEN<2:0>: Binary Coded Decimal Value of Minute’s Tens Digit bits
Contains a value from 0 to 5.
bit 11-8 MINONE<3:0>: Binary Coded Decimal Value of Minute’s Ones Digit bits
Contains a value from 0 to 9.
bit 7 Unimplemented: Read as ‘0’
bit 6-4 SECTEN<2:0>: Binary Coded Decimal Value of Second’s Tens Digit bits
Contains a value from 0 to 5.
bit 3-0 SECONE<3:0>: Binary Coded Decimal Value of Second’s Ones Digit bits
Contains a value from 0 to 9.
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REGISTER 22-1 1: RTCCSWT: POWER CONTROL AND SAMPLE WINDOW TIMER REGISTER(1)
R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x
PWCSTAB7 PWCSTAB6 PWCSTAB5 PWCSTAB4 PWCSTAB3 PWCSTAB2 PWCSTAB1 PWCSTAB0
bit 15 bit 8
R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x
PWCSAMP7(2)PWCSAMP6(2)PWCSAMP5(2)PWCSAMP4(2)PWCSAMP3(2)PWCSAMP2(2)PWCSAMP1(2)PWCSAMP0(2)
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-8 PWCSTAB<7:0>: Power Control Stability Window Timer bits
11111111 = Stability Window is 255 TPWCCLK clock periods
11111110 = Stability Window is 254 TPWCCLK clock periods
...
00000001 = Stability Window is 1 TPWCCLK clock period
00000000 = No Stability Window; Sample Window starts when the alarm event triggers
bit 7-0 PWCSAMP<7:0>: Power Control Sample Window Timer bits(2)
11111111 = Sample Window is always enabled, even when PWCEN = 0
11111110 = Sample Window is 254 TPWCCLK clock periods
...
00000001 = Sample Window is 1 TPWCCLK clock period
00000000 = No Sample Window
Note 1: A write to this register is only allowed when RTCWREN = 1.
2: The Sample Window always starts when the Stability Window timer expires, except when its initial value is 00h.
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22.4 Calibration
The real-time crystal input can be calibrated using the
periodic auto-adjust feature. When properly calibrated,
the RTCC can provide an error of less than 3 seconds
per month. This is accomplished by finding the number
of error clock pulses and storing the value into the
lower half of the RCFGCAL register. The 8-bit signed
value loaded into the lower half of RCFGCAL is
multiplied by four and will either be added or subtracted
from the RTCC timer, once every minute. Refer to the
steps below for RTCC calibration:
1. Using another timer resource on the device, the
user must find the error of the 32.768 kHz crystal.
2. Once the error is known, it must be converted to
the number of error clock pulses per minute.
3. a) If the oscillator is faster than ideal (negative
result form Step 2), the RCFGCAL register value
must be negative. This causes the specified
number of clock pulses to be subtracted from
the timer counter, once every minute.
b) If the oscillator is slower than ideal (positive
result from Step 2), the RCFGCAL register value
must be positive. This causes the specified
number of clock pulses to be subtracted from
the timer counter, once every minute.
EQUATION 22-1:
Writes to the lower half of the RCFGCAL register
should only occur when the timer is turned off, or
immediately after the rising edge of the seconds pulse,
except when SECONDS = 00, 15, 30 or 45. This is due
to the auto-adjust of the RTCC at 15 second intervals.
22.5 Alarm
• Configurable from half second to one year
• Enabled using the ALRMEN bit
(ALCFGRPT<15>)
• One-time alarm and repeat alarm options
available
22.5.1 CONFIGURING THE ALARM
The alarm feature is enabled using the ALRMEN bit.
This bit is cleared when an alarm is issued. Writes to
ALRMVAL should only take place when ALRMEN = 0.
As shown in Figure 22-2, the interval selection of the
alarm is configured through the AMASK bits
(ALCFGRPT<13:10>). These bits determine which and
how many digits of the alarm must match the clock
value for the alarm to occur.
The alarm can also be configured to repeat based on a
preconfigured interval. The amount of times this
occurs, once the alarm is enabled, is stored in the
ARPT<7:0> bits (ALCFGRPT<7:0>). When the value
of the ARPT bits equals 00h and the CHIME bit
(ALCFGRPT<14>) is cleared, the repeat function is
disabled and only a single alarm will occur. The alarm
can be repeated, up to 255 times, by loading
ARPT<7:0> with FFh.
After each alarm is issued, the value of the ARPT bits
is decremented by one. Once the value has reached
00h, the alarm will be issued one last time, after which,
the ALRMEN bit will be cleared automatically and the
alarm will turn off.
Indefinite repetition of the alarm can occur if the
CHIME bit = 1. Instead of the alarm being disabled
when the value of the ARPT bits reaches 00h, it rolls
over to FFh and continues counting indefinitely while
CHIME is set.
22.5.2 ALARM INTERRUPT
At every alarm event, an interrupt is generated. In
addition, an alarm pulse output is provided that
operates at half the frequency of the alarm. This output
is completely synchronous to the RTCC clock and can
be used as a trigger clock to other peripherals.
(Ideal Frequency† – Measured Frequency) * 60 =
Clocks per Minute
† Ideal Frequency = 32,768 Hz
Note: It is up to the user to include, in the error
value, the initial error of the crystal: drift
due to temperature and drift due to crystal
aging.
Note: Changing any of the registers, other than
the RCFGCAL and ALCFGRPT registers,
and the CHIME bit while the alarm is
enabled (ALRMEN = 1), can result in a
false alarm event leading to a false alarm
interrupt. To avoid a false alarm event, the
timer and alarm values should only be
changed while the alarm is disabled
(ALRMEN = 0). It is recommended that
the ALCFGRPT register and CHIME bit be
changed when RTCSYNC = 0.
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FIGURE 22-2: ALARM MASK SETTINGS
22.6 POWER CONTROL
The RTCC includes a power control feature that allows
the device to periodically wake-up an external device,
wait for the device to be stable before sampling
wake-up events from that device, and then shut down
the external device. This can be done completely
autonomously by the RTCC, without the need to wake
from the current lower power mode (Sleep, Deep
Sleep, etc.).
To use this feature:
1. Enable the RTCC (RTCEN = 1).
2. Set the PWCEN bit (RTCPWC<15>).
3. Configure the RTCC pin to drive the PWC control
signal (RTCOE = 1 and RTCOUT<1:0> = 11).
The polarity of the PWC control signal may be chosen
using the PWCPOL bit (RTCPWC<14>). An active-low
or active-high signal may be used with the appropriate
external switch to turn on or off the power to one or
more external devices. The active-low setting may also
be used in conjunction with an open-drain setting on
the RTCC pin, in order to drive the ground pin(s) of the
external device directly (with the appropriate external
VDD pull-up device), without the need for external
switches. Finally, the CHIME bit should be set to enable
the PWC periodicity.
22.7 RTCC VBAT OPERATION
The RTCC can operate in VBAT mode when there is a
power loss on the VDD pin. The RTCC will continue to
operate if the VBAT pin is powered on (it is usually
connected to the battery).
The VBAT BOR can be enabled/disabled using the
VBTBOR bit in the CW3 Configuration register
(CW3<7>). If the VBTBOR enable bit is cleared, the
VBAT BOR is always disabled and there will be no indi-
cation of a VBAT BOR. If the VBTBOR bit is set, the
RTCC can receive a Reset and the RTCEN bit will get
cleared; it can happen anywhere between 1.95-1.4V
(typical).
Note 1: Annually, except when configured for February 29.
s
ss
mss
mm s s
hh mm ss
dhhmmss
dd hh mm ss
mm d d h h mm s s
Day of
the
Week Month Day Hours Minutes Seconds
Alarm Mask Setting
(AMASK<3:0>)
0000 - Every half second
0001 - Every second
0010 - Every 10 seconds
0011 - Every minute
0100 - Every 10 minutes
0101 - Every hour
0110 - Every day
0111 - Every week
1000 - Every month
1001 - Every year(1)
Note: It is recommended to connect the VBAT
pin to VDD if the VBAT mode is not used
(not connected to the battery).
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NOTES:
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23.0 32-BIT PROGRAMMABLE
CYCLIC REDUNDANCY CHECK
(CRC) GENERATOR
The 32-bit programmable CRC generator provides a
hardware implemented method of quickly generating
checksums for various networking and security
applications. It offers the following features:
• User-programmable CRC polynomial equation,
up to 32 bits
• Programmable shift direction (little or big-endian)
• Independent data and polynomial lengths
• Configurable interrupt output
• Data FIFO
Figure 23-1 displays a simplified block diagram of the
CRC generator. A simple version of the CRC shift
engine is displayed in Figure 23-2.
FIGURE 23-1: CRC BLOCK DIAGRAM
FIGURE 23-2: CRC SHIFT ENGINE DETAIL
Note: This data sheet summarizes the features of
this group of PIC24F devices. It is not
intended to be a comprehensive reference
source. For more information, refer to the
“PIC24F Family Reference Manual”,
Section 41. “32-Bit Programmable
Cyclic Redundancy Check (CRC)”
(DS39729). The information in this data
sheet supersedes the information in the
FRM.
CRC
Interrupt
Variable FIFO
(4x32, 8x16 or 16x8)
CRCDATH CRCDATL
Shift Buffer
CRC Shift Engine
CRCWDATH CRCWDATL
Shifter Clock
2 * FCY
LENDIAN
CRCISEL
1
0
FIFO Empty
Event
Shift
Complete
Event
1
0
Note 1: n = PLEN<4:1> + 1.
CRC Shift Engine CRCWDATH CRCWDATL
Bit 0 Bit 1 Bit n(1)
X0 X1 Xn(1)
Read/Write Bus
Shift Buffer
Data
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23.1 User Interface
23.1.1 POLYNOMIAL INTERFACE
The CRC module can be programmed for CRC
polynomials of up to the 32nd order, using up to 32 bits.
Polynomial length, which reflects the highest exponent
in the equation, is selected by the PLEN<4:0> bits
(CRCCON2<4:0>).
The CRCXORL and CRCXORH registers control which
exponent terms are included in the equation. Setting a
particular bit includes that exponent term in the equa-
tion. Functionally, this includes an XOR operation on
the corresponding bit in the CRC engine. Clearing the
bit disables the XOR.
For example, consider two CRC polynomials, one a
16-bit and the other a 32-bit equation.
EQUATION 23-1: 16-BIT, 32-BIT CRC
POLYNOMIALS
To program these polynomial into the CRC generator,
set the register bits, as shown in Table 23-1.
Note that the appropriate positions are set to ‘1’ to indi-
cate that they are used in the equation (for example,
X26 and X23). The ‘0’ bit required by the equation is
always XORed; thus, X0 is a don’t care. For a poly-
nomial of length 32, it is assumed that the 32nd bit will
be used. Therefore, the X<31:1> bits do not have the
32nd bit.
23.1.2 DATA INTERFACE
The module incorporates a FIFO that works with a
variable data width. Input data width can be configured
to any value between 1 and 32 bits using the
DWIDTH<4:0> bits (CRCCON2<12:8>). When the
data width is greater than 15, the FIFO is 4 words deep.
When the DWITDH bits are between 15 and 8, the
FIFO is 8 words deep. When the DWIDTH bits are less
than 8, the FIFO is 16 words deep.
The data for which the CRC is to be calculated must
first be written into the FIFO. Even if the data width is
less than 8, the smallest data element that can be writ-
ten into the FIFO is 1 byte. For example, if the DWIDTH
bits are 5, then the size of the data is
DWIDTH<4:0> + 1 or 6. The data is written as a whole
byte; the two unused upper bits are ignored by the
module.
Once data is written into the MSb of the CRCDAT reg-
isters (that is, the MSb as defined by the data width),
the value of the VWORD<4:0> bits (CRCCON1<12:8>)
increments by one. For example, if the DWIDTH bits
are 24, the VWORD bits will increment when bit 7 of
CRCDATH is written. Therefore, CRCDATL must
always be written to before CRCDATH.
The CRC engine starts shifting data when the CRCGO
bit is set and the value of the VWORD bits is greater
than zero.
Each word is copied out of the FIFO into a buffer regis-
ter, which decrements the VWORD bits. The data is
then shifted out of the buffer. The CRC engine contin-
ues shifting at a rate of two bits per instruction cycle,
until the VWORD bits reach zero. This means that for a
given data width, it takes half that number of instruc-
tions for each word to complete the calculation. For
example, it takes 16 cycles to calculate the CRC for a
single word of 32-bit data.
When the VWORD bits reach the maximum value for
the configured value of the DWIDTH bits (4, 8 or 16),
the CRCFUL bit becomes set. When the VWORD bits
reach zero, the CRCMPT bit becomes set. The FIFO is
emptied and the VWORD<4:0> bits are set to ‘00000’
whenever CRCEN is ‘0’.
At least one instruction cycle must pass after a write to
CRCWDAT before a read of the VWORD bits is done.
and
X32+ X26 + X23 + X22 + X16 + X12 + X11 + X10 +
X8 + X7 + X5 + X4 + X2 + X + 1
X16 + X12 + X5 + 1
TABLE 23-1: CRC SETUP EXAMPLES FOR 16 AND 32-BIT POLYNOMIALS
CRC Control Bits Bit Values
16-Bit Polynomial 32-Bit Polynomial
PLEN<4:0> 01111 11111
X<31:16> 0000 0000 0000 0001 0000 0100 1100 0001
X<15:0> 0001 0000 0010 000X 0001 1101 1011 011x
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23.1.3 DATA SHIFT DIRECTION
The LENDIAN bit (CRCCON1<3>) is used to control
the shift direction. By default, the CRC will shift data
through the engine, MSb first. Setting LENDIAN (= 1)
causes the CRC to shift data, LSb first. This setting
allows better integration with various communication
schemes and removes the overhead of reversing the
bit order in software. Note that this only changes the
direction the data is shifted into the engine. The result
of the CRC calculation will still be a normal CRC result,
not a reverse CRC result.
23.1.4 INTERRUPT OPERATION
The module generates an interrupt that is configurable
by the user for either of two conditions.
If CRCISEL is ‘0’, an interrupt is generated when the
VWORD<4:0> bits make a transition from a value of ‘1’
to ‘0’. If CRCISEL is ‘1’, an interrupt will be generated
after the CRC operation finishes and the module sets
the CRCGO bit to ‘0’. Manually setting CRCGO to ‘0’
will not generate an interrupt. Note that when an
interrupt occurs, the CRC calculation would not yet be
complete. The module will still need (PLEN + 1)/2 clock
cycles after the interrupt is generated until the CRC
calculation is finished.
23.1.5 TYPICAL OPERATION
To use the module for a typical CRC calculation:
1. Set the CRCEN bit to enable the module.
2. Configure the module for desired operation:
a) Program the desired polynomial using the
CRCXORL and CRCXORH registers, and the
PLEN<4:0> bits.
b) Configure the data width and shift direction
using the DWIDTH and LENDIAN bits.
c) Select the desired Interrupt mode using the
CRCISEL bit.
3. Preload the FIFO by writing to the CRCDATL
and CRCDATH registers until the CRCFUL bit is
set or no data is left.
4. Clear old results by writing 00h to CRCWDATL
and CRCWDATH. The CRCWDAT registers can
also be left unchanged to resume a previously
halted calculation.
5. Set the CRCGO bit to start calculation.
6. Write remaining data into the FIFO as space
becomes available.
7. When the calculation completes, CRCGO is
automatically cleared. An interrupt will be
generated if CRCISEL = 1.
8. Read CRCWDATL and CRCWDATH for the
result of the calculation.
There are eight registers used to control programmable
CRC operation:
• CRCCON1
• CRCCON2
• CRCXORL
• CRCXORH
• CRCDATL
• CRCDATH
• CRCWDATL
• CRCWDATH
The CRCCON1 and CRCCON2 registers
(Register 23-1 and Register 23-2) control the operation
of the module and configure the various settings.
The CRCXOR registers (Register 23-3 and
Register 23-4) select the polynomial terms to be used
in the CRC equation. The CRCDAT and CRCWDAT
registers are each register pairs that serve as buffers
for the double-word input data and CRC processed
output, respectively.
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REGISTER 23-1: CRCCON1: CRC CONTROL 1 REGISTER
R/W-0 U-0 R/W-0 R-0, HSC R-0, HSC R-0, HSC R-0, HSC R-0, HSC
CRCEN — CSIDL VWORD4 VWORD3 VWORD2 VWORD1 VWORD0
bit 15 bit 8
R-0, HSC R-1, HSC R/W-0 R/W-0, HC R/W-0 U-0 U-0 U-0
CRCFUL CRCMPT CRCISEL CRCGO LENDIAN ———
bit 7 bit 0
Legend: HC = Hardware Clearable bit HSC = Hardware Settable/Clearable bit
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 CRCEN: CRC Enable bit
1 = Enables module
0 = Disables module; all state machines, pointers and CRCWDAT/CRCDATH registers reset; other
SFRs are NOT reset
bit 14 Unimplemented: Read as ‘0’
bit 13 CSIDL: CRC Stop in Idle Mode bit
1 = Discontinue module operation when device enters Idle mode
0 = Continue module operation in Idle mode
bit 12-8 VWORD<4:0>: Pointer Value bits
Indicates the number of valid words in the FIFO. Has a maximum value of 8 when PLEN<4:0> 7 or 16
when PLEN<4:0> 7.
bit 7 CRCFUL: FIFO Full bit
1 = FIFO is full
0 = FIFO is not full
bit 6 CRCMPT: FIFO Empty bit
1 = FIFO is empty
0 = FIFO is not empty
bit 5 CRCISEL: CRC Interrupt Selection bit
1 = Interrupt on FIFO is empty; the final word of data is still shifting through the CRC
0 = Interrupt on shift is complete and results are ready
bit 4 CRCGO: Start CRC bit
1 = Start CRC serial shifter
0 = CRC serial shifter is turned off
bit 3 LENDIAN: Data Shift Direction Select bit
1 = Data word is shifted into the CRC, starting with the LSb (little endian)
0 = Data word is shifted into the CRC, starting with the MSb (big endian)
bit 2-0 Unimplemented: Read as ‘0’
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REGISTER 23-2: CRCCON2: CRC CONTROL 2 REGISTER
U-0 U-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
— — — DWIDTH4 DWIDTH3 DWIDTH2 DWIDTH1 DWIDTH0
bit 15 bit 8
U-0 U-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
— — — PLEN4 PLEN3 PLEN2 PLEN1 PLEN0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-13 Unimplemented: Read as ‘0’
bit 12-8 DWIDTH<4:0>: Data Word Width Configuration bits
Configures the width of the data word (Data Word Width – 1).
bit 7-5 Unimplemented: Read as ‘0’
bit 4-0 PLEN<4:0>: Polynomial Length Configuration bits
Configures the length of the polynomial (Polynomial Length – 1).
REGISTER 23-3: CRCXORL: CRC XOR POLYNOMIAL REGISTER, LOW BYTE
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
X15 X14 X13 X12 X11 X10 X9 X8
bit 15 bit 8
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 U-0
X7 X6 X5 X4 X3 X2 X1 —
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-1 X<15:1>: XOR of Polynomial Term xn Enable bits
bit 0 Unimplemented: Read as ‘0’
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REGISTER 23-4: CRCXORH: CRC XOR HIGH REGISTER
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
X31 X30 X29 X28 X27 X26 X25 X24
bit 15 bit 8
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
X23 X22 X21 X20 X19 X18 X17 X16
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-0 X<31:16>: XOR of Polynomial Term xn Enable bits
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24.0 12-BIT A/D CONVERTER WITH
THRESHOLD SCAN
The 12-bit A/D Converter has the following key
features:
• Successive Approximation Register (SAR)
Conversion
• Conversion Speeds of up to 200 ksps
• Up to 32 Analog Input Channels (internal and
external)
• Selectable 10-Bit or 12-Bit (default) Conversion
Resolution
• Multiple Internal Reference Input Channels
• External Voltage Reference Input Pins
• Unipolar Differential Sample-and-Hold (S/H)
Amplifier
• Automated Threshold Scan and Compare
Operation to Pre-Evaluate Conversion Results
• Selectable Conversion Trigger Source
• Fixed Length (one word per channel),
Configurable Conversion Result Buffer
• Four Options for Results Alignment
• Configurable Interrupt Generation
• Enhanced DMA Operations with Indirect Address
Generation
• Operation During CPU Sleep and Idle modes
The 12-bit A/D Converter module is an enhanced ver-
sion of the 10-bit module offered in earlier PIC24
devices. It is a Successive Approximation Register
(SAR) Converter, enhanced with 12-bit resolution, a
wide range of automatic sampling options, tighter inte-
gration with other analog modules and a configurable
results buffer.
It also includes a unique Threshold Detect feature that
allows the module itself to make simple decisions
based on the conversion results, and enhanced opera-
tion with the DMA Controller through Peripheral Indirect
Addressing (PIA).
A simplified block diagram for the module is shown in
Figure 24-1.
24.1 Basic Operation
To perform a standard A/D conversion:
1. Configure the module:
a) Configure port pins as analog inputs by
setting the appropriate bits in the ANSELn
registers (see Section 11.2 “Configuring
Analog Port Pins (ANSx)” for more
information).
b) Select the voltage reference source to
match expected range on analog inputs
(AD1CON2<15:13>).
c) Select the positive and negative multiplexer
inputs for each channel (AD1CHS<15:0>).
d) Select the analog conversion clock to match
the desired data rate with the processor
clock (AD1CON3<7:0>).
e) Select the appropriate sample/conversion
sequence (AD1CON1<7:5> and
AD1CON3<12:8>).
f) For Channel A scanning operations, select
the positive channels to be included
(AD1CSSH and AD1CSSL registers).
g) Select how conversion results are
presented in the buffer (AD1CON1<9:8>
and AD1CON5 register).
h) Select the interrupt rate (AD1CON2<5:2>).
i) Turn on A/D module (AD1CON1<15>).
2. Configure the A/D interrupt (if required):
a) Clear the AD1IF bit (IFS0<13>).
b) Enable the AD1IE interrupt (IEC0<13>).
c) Select the A/D interrupt priority (IPC3<6:4>).
3. If the module is configured for manual sampling,
set the SAMP bit (AD1CON1<1>) to begin
sampling.
Note: This data sheet summarizes the features
of this group of PIC24F devices. It is not
intended to be a comprehensive refer-
ence source. For more information on the
12-Bit A/D Converter, refer to the “PIC24F
Family Reference Manual”, Section 51.
“12-Bit A/D Converter with Threshold
Detect” (DS39739).
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FIGURE 24-1: 12-BIT A/D CONVERTER BLOCK DIAGRAM (PIC24FJ128GA310 FAMILY)
Comparator
12-Bit SAR
VREF+
DAC
AN22(1)
AN23(1)
AN16(1)
AN21(1)
AN14
AN15
AN0
AN1
AN2
VREF-
Sample Control
S/H
AVSS
AVDD
ADC1BUF0:
ADC1BUF25(2)
AD1CON1
AD1CON2
AD1CON3
AD1CHS
AD1CHITL
AD1CHITH
Control Logic
Data Formatting
Input MUX Control
Conversion Control
Internal Data Bus
16
VR+VR-
MUX B
VINH
VINL
VINH
VINH
VINL
VINL
VR+
VR-
VR Select
VBG
VBG/6
AD1CSSL
AD1CSSH
Note 1: AN16 through AN23 are implemented on 100-pin devices only.
2: A/D result buffers are numbered in hexadecimal; ADC1BUF0 through ADC1BUF19 represent Buffers 1 through 26.
CTMU
VBAT/2
AVSS
AVDD
AD1CON5
VBG/2
VBG
DMA Data Bus
16
AD1CON4
AD1DMBUF
Extended DMA data
Conversion Logic
MUX A
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24.2 Extended DMA Operations
In addition to the standard features available on all
12-bit A/D Converters, PIC24FJ128GA310 family
devices implement a limited extension of DMA func-
tionality. This extension adds features that work with
the device’s DMA Controller to expand the A/D
module’s data storage abilities beyond the module’s
built-in buffer.
The Extended DMA functionality is controlled by the
DMAEN bit (AD1CON1<10>); setting this bit enables
the functionality. The DMABM bit (AD1CON1<11>)
configures how the DMA feature operates.
24.2.1 EXTENDED BUFFER MODE
Extended Buffer mode (DMABM = 1) is useful for stor-
ing the results of conversions on the upper channels
(i.e., 26 and above), which do not have their own
memory mapped buffers inside the A/D module. It can
also be used to store the conversion results on any A/D
channel in any implemented address in data RAM.
In Extended Buffer mode, all data from the A/D Buffer
register, and channels above 26, is mapped into data
RAM. Conversion data is written to a destination
specified by the DMA Controller, specifically by the
DMADST register. This allows users to read the con-
version results of channels above 26, which do not
have their own memory mapped A/D buffer locations,
from data memory.
When using Extended Buffer mode, always set the
BUFREGEN bit to disable FIFO operation. In addition,
disable the Split Buffer mode by clearing the BUFM bit.
24.2.2 PIA MODE
When DMABM = 0, the A/D module is configured to
function with the DMA controller for Peripheral Indirect
Addressing (PIA) mode operations. In this mode, the
A/D module generates an 11-bit Indirect Address (IA).
This is ORed with the destination address in the DMA
Controller to define where the A/D conversion data will
be stored.
In PIA mode, the buffer space is created as a series of
contiguous smaller buffers, one per analog channel. The
size of the channel buffer determines how many analog
channels can be accommodated. The size of the buffer
is selected by the DMABL bits (AD1CON4<2:0>). The
size options range from a single word per buffer to
128 words. Each channel is allocated a buffer of this
size, regardless of whether or not the channel will
actually have conversion data.
The IA is created by combining the base address within
a channel buffer with three to five bits (depending on
the buffer size) to identify the channel. The base
address ranges from zero to seven bits wide, depend-
ing on the buffer size. The address is right-padded with
a ‘0’ in order to maintain address alignment in the data
space. The concatenated channel and base address
bits are then left-padded with zeroes, as necessary, to
complete the 11-bit IA.
The IA is configured to auto-increment during write
operations by using the SMPI bits (AD1CON2<6:2>).
As with PIA operations for any DMA-enabled module,
the base destination address in the DMADST register
must be masked properly to accommodate the IA.
Table 24-1 shows how complete addresses are
formed. Note that the address masking varies for each
buffer size option. Because of masking requirements,
some address ranges may not be available for certain
buffer sizes. Users should verify that the DMA base
address is compatible with the buffer size selected.
Figure 24-2 shows how the parts of the address define
the buffer locations in data memory. In this case, the
module “allocates” 256 bytes of data RAM (1000h to
1100h) for 32 buffers of four words each. However, this
is not a hard allocation and nothing prevents these
locations from being used for other purposes. For
example, in the current case, if Analog Channels 1, 3
and 8 are being sampled and converted, conversion
data will only be written to the channel buffers, starting
at 1008h, 1018h and 1040h. The holes in PIA buffer
space can be used for any other purpose. It is the
user’s responsibility to keep track of buffer locations
and preventing data overwrites.
24.3 A/D Operation with VBAT
One of the A/D channels is connected to the VBAT pin
to monitor the VBAT voltage. This allows monitoring the
VBAT pin voltage (battery voltage) with no external con-
nection. The voltage measured, using the A/D VBAT
monitor, is VBAT/2. The voltage can be calculated by
reading A/D = ((VBAT/2)/VDD) * 1024 for 10-bit A/D and
((VBAT/2)/VDD) * 4096 for 12 bit A/D.
When using the VBAT A/D monitor:
• Connect the A/D channel to ground to discharge
the sample capacitor.
• Because of the high-impedance of VBAT, select
higher sampling time to get an accurate reading.
Since the VBAT pin is connected to the A/D during
sampling, to prolong the VBAT battery life, the
recommendation is to select the VBAT channel when
needed.
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DS39996F-page 298 2010-2011 Microchip Technology Inc.
24.4 Registers
The 12-bit A/D Converter is controlled through a total of
13 registers:
• AD1CON1 through AD1CON5 (Register 24-1
through Register 24-5)
•AD1CS (Register 24-6)
• AD1CHITH and AD1CHITL (Register 24-8 and
Register 24-9)
• AD1CSSH and AD1CSSL (Register 24-10 and
Register 24-11)
• AD1CTMENH and AD1CTMENL (Register 24-12
and Register 24-13)
• AD1DMBUF (not shown) – The 16-bit conversion
buffer for Extended Buffer mode
TABLE 24-1: INDIRECT ADDRESS GENERATION IN PIA MODE
DMABL<2:0> Buffer Size per
Channel (words) Generated Offset
Address (lower 11 bits)
Available
Input
Channels
Allowable DMADST
Addresses
000 1000 00cc ccc0 32 xxxx xxxx xx00 0000
001 2000 0ccc ccn0 32 xxxx xxxx x000 0000
010 4000 cccc cnn0 32 xxxx xxxx 0000 0000
011 800c cccc nnn0 32 xxxx xxx0 0000 0000
100 16 0cc cccn nnn0 32 xxxx xx00 0000 0000
101 32 ccc ccnn nnn0 32 xxxx x000 0000 0000
110 64 ccc cnnn nnn0 16 xxxx x000 0000 0000
111 128 ccc nnnn nnn0 8xxxx x000 0000 0000
Legend: ccc = Channel number (three to five bits), n = Base buffer address (zero to seven bits),
x = User-definable range of DMADST for base address, 0 = Masked bits of DMADST for IA.
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FIGURE 24-2: EXAMP L E OF B UFFE R ADDRESS GENERATION IN PIA MODE
(4-WORD BUFFERS PER CHANNEL)
Data RAM
Destination
A/D Module
(PIA Mod e)
BBA
DMA Channel
DMADST
nn (0-3)
1000h (DMA Base Address)
Range
Channel
ccccc (0-31) 000 ccc c cnn0 (IA)
1000h
DMABL<2:0> = 010
(16-Word Buffer Size)
1008h
1010h
1018h
10F8h
1100h
Ch 0 Buffer (4 Words)
Ch 1 Buffer (4 Words)
Ch 2 Buffer (4 Words)
Ch 3 Buffer (4 Words)
Ch 29 Buffer (4 Words)
Ch 29 Buffer (4 Words)
Ch 31 Buffer (4 Words)
10F0h
(Buffer Base Address)
1000h
1002h
1004h
1006h
Ch 0, Word 0
Ch 0, Word 1
Ch 0, Word 2
Ch 0, Word 3
Ch 1, Word 0
Ch 1, Word 1
Ch 1, Word 2
Ch 1, Word 3
1008h
100Ah
100Ch
100Eh
0001 0000 0000 0000
0001 0000 0000 0010
0001 0000 0000 0100
0001 0000 0000 0110
0001 0000 0000 1000
0001 0000 0000 1010
0001 0000 0000 1100
0001 0000 0000 1110
DMA Base Address
Address Mask
Channel Address
Buffer Address
1038h
1040h
Ch 7 Buffer (4 Words)
Ch 8 Buffer (4 Words)
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REGISTER 24-1: AD1CON1: A/D CONTROL REGISTER 1
R/W-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
ADON —ADSIDLDMABM
(1)DMAEN MODE12 FORM1 FORM0
bit 15 bit 8
R/W-0 R/W-0 R/W-0 R/W-0 U-0 R/W-0 R/W-0, HCS R/C-0, HCS
SSRC3 SSRC2 SSRC1 SSRC0 — ASAM SAMP DONE
bit 7 bit 0
Legend: U = Unimplemented bit, read as ‘0’
R = Readable bit W = Writable bit HSC = Hardware Settable/Clearable bit
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 ADON: A/D Operating Mode bit
1 = A/D Converter module is operating
0 = A/D Converter is off
bit 14 Unimplemented: Read as ‘0’
bit 13 ADSIDL: Stop in Idle Mode bit
1 = Discontinue module operation when device enters Idle mode
0 = Continue module operation in Idle mode
bit 12 DMABM: Extended DMA Buffer Mode Select bit(1)
1 = Extended Buffer mode: Buffer address is defined by the DMAnDST register
0 = PIA mode: Buffer addresses are defined by the DMA controller and AD1CON4<2:0>
bit 11 DMAEN: Extended DMA/Buffer Enable bit
1 = Extended DMA and buffer features are enabled
0 = Extended features are disabled
bit 10 MODE12: 12-Bit Operation Mode bit
1 = 12-bit A/D operation
0 = 10-bit A/D operation
bit 9-8 FORM<1:0>: Data Output Format bits (see formats following)
11 = Fractional result, signed, left-justified
10 = Absolute fractional result, unsigned, left-justified
01 = Decimal result, signed, right-justified
00 = Absolute decimal result, unsigned, right-justified
bit 7-4 SSRC<3:0>: Sample Clock Source Select bits
1xxx = Unimplemented, do not use
0111 = Internal counter ends sampling and starts conversion (auto-convert). Do not use in
Auto-Scan mode
0110 = Unimplemented
0101 =TMR1
0100 =CTMU
0011 =TMR5
0010 =TMR3
0001 =INT0
0000 = The SAMP bit must be cleared by software to start conversion
bit 3 Unimplemented: Read as ‘0’
bit 2 ASAM: A/D Sample Auto-Start bit
1 = Sampling begins immediately after last conversion; SAMP bit is auto-set
0 = Sampling begins when SAMP bit is manually set
Note 1: This bit is only available when Extended DMA/Buffer features are available (DMAEN = 1).
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bit 1 SAMP: A/D Sample Enable bit
1 = A/D Sample-and-Hold amplifiers are sampling
0 = A/D Sample-and-Hold amplifiers are holding
bit 0 DONE: A/D Conversion Status bit
1 = A/D conversion cycle has completed
0 = A/D conversion has not started or is in progress
REGISTER 24-1: AD1CON1: A/D CONTROL REGISTER 1 (CONTINUED)
Note 1: This bit is only available when Extended DMA/Buffer features are available (DMAEN = 1).
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REGISTER 24-2: AD1CON2: A/D CONTROL REGISTER 2
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 U-0 U-0
PVCFG1 PVCFG0 NVCFG0 OFFCAL BUFREGEN CSCNA — —
bit 15 bit 8
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
BUFS(1)SMPI4 SMPI3 SMPI2 SMPI1 SMPI0 BUFM(1)ALTS
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-14 PVCFG<1:0>: Converter Positive Voltage Reference Configuration bits
1x = Unimplemented, do not use
01 =External V
REF+
00 =AV
DD
bit 13 NVCFG0: Converter Negative Voltage Reference Configuration bits
1 =External V
REF-
0 =AV
SS
bit 12 OFFCAL: Offset Calibration Mode Select bit
1 = Inverting and non-inverting inputs of channel Sample-and-Hold are connected to AVSS
0 = Inverting and non-inverting inputs of channel Sample-and-Hold are connected to normal inputs
bit 11 BUFREGEN: A/D Buffer Register Enable bit
1 = Conversion result is loaded into the buffer location determined by the converted channel
0 = A/D result buffer is treated as a FIFO
bit 10 CSCNA: Scan Input Selections for CH0+ During Sample A bit
1 = Scan inputs
0 = Do not scan inputs
bit 9-8 Unimplemented: Read as ‘0’
bit 7 BUFS: Buffer Fill Status bit(1)
1 = A/D is filling the upper half of the buffer; user should access data in the lower half
0 = A/D is filling the lower half of the buffer; user should access data in the upper half
bit 6-2 SMPI<4:0>: Interrupt Sample/DMA Increment Rate Select bits
When DMAEN = 1:
0001 = For 2-channel DMA A/D operation
0000 = For 1-channel DMA A/D operation
When DMAEN = 0:
Selects the number of sample/conversions per each interrupt
11111 = Interrupt/address increment at the completion of conversion for each 32nd sample
11110 = Interrupt/address increment at the completion of conversion for each 31st sample
00001 = Interrupt/address increment at the completion of conversion for every other sample
00000 = Interrupt/address increment at the completion of conversion for each sample
Note 1: These bits are only applicable when the buffer is used in FIFO mode (BUFREGEN = 0). In addition, BUFS
is only used when BUFM = 1.
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bit 1 BUFM: Buffer Fill Mode Select bit(1)
1 = A/D buffer is two, 13-word buffers, starting at ADC1BUF0 and ADC1BUF12, and sequential
conversions fill the buffers alternately (Split mode)
0 = A/D buffer is a single, 26-word buffer and fills sequentially from ADC1BUF0 (FIFO mode)
bit 0 ALTS: Alternate Input Sample Mode Select bit
1 = Uses channel input selects for Sample A on first sample and Sample B on next sample
0 = Always uses channel input selects for Sample A
REGISTER 24-2: AD1CON2: A/D CONTROL REGISTER 2 (CONTINUED)
Note 1: These bits are only applicable when the buffer is used in FIFO mode (BUFREGEN = 0). In addition, BUFS
is only used when BUFM = 1.
REGISTER 24-3: AD1CON3: A/D CONTROL REGISTER 3
R/W-0 R-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
ADRC EXTSAM PUMPEN SAMC4 SAMC3 SAMC2 SAMC1 SAMC0
bit 15 bit 8
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
ADCS7 ADCS6 ADCS5 ADCS4 ADCS3 ADCS2 ADCS1 ADCS0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 ADRC: A/D Conversion Clock Source bit
1 = RC Clock
0 = Clock derived from system clock
bit 14 EXTSAM: Extended Sampling Time bit
1 = A/D is still sampling after SAMP = 0
0 = A/D is finished sampling
bit 13 PUMPEN: Charge Pump Enable bit
1 = Charge pump for switches is enabled
0 = Charge pump for switches is disabled
bit 12-8 SAMC<4:0>: Auto-Sample Time Select bits
11111 = 31 T
AD
00001 =1 T
AD
00000 = 0 TAD
bit 7-0 ADCS<7:0>: A/D Conversion Clock Select bits
11111111
= Reserved
01000000
00111111 = 64·TCY =TAD
00000001 = 2·T
CY =TAD
00000000 = TCY =TAD
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REGISTER 24-4: AD1CON4: A/D CONTROL REGISTER 4
U-0 U-0 U-0 U-0 U-0 U-0 U-0 U-0
— — — — — — — —
bit 15 bit 8
U-0 U-0 U-0 U-0 U-0 R/W-0 R/W-0 R/W-0
— — — — — DMABL2(1)DMABL1(1)DMABL0(1)
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-3 Unimplemented: Read as ‘0’
bit 2-0 DMABL<2:0>: DMA Buffer Size Select bits(1)
111 = Allocates 128 words of buffer to each analog input
110 = Allocates 64 words of buffer to each analog input
101 = Allocates 32 words of buffer to each analog input
100 = Allocates 16 words of buffer to each analog input
011 = Allocates 8 words of buffer to each analog input
010 = Allocates 4 words of buffer to each analog input
001 = Allocates 2 words of buffer to each analog input
000 = Allocates 1 word of buffer to each analog input
Note 1: The DMABL<2:0> bits are only used when AD1CON1<11> = 1 and AD1CON<12> = 0; otherwise, their
value is ignored.
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REGISTER 24-5: AD1CON5: A/D CONTROL REGISTER 5
R/W-0 R/W-0 R/W-0 R/W-0 U-0 U-0 R/W-0 R/W-0
ASEN LPEN CTMREQ BGREQ —— ASINT1 ASINT0
bit 15 bit 8
U-0 U-0 U-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0
———— WM1 WM0 CM1 CM0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 ASEN: Auto-Scan Enable bit
1 = Auto-scan is enabled
0 = Auto-scan is disabled
bit 14 LPEN: Low-Power Enable bit
1 = Low power is enabled after scan
0 = Full power is enabled after scan
bit 13 CTMREQ: CTMU Request bit
1 = CTMU is enabled when the A/D is enabled and active
0 = CTMU is not enabled by the A/D
bit 12 BGREQ: Band Gap Request bit
1 = Band gap is enabled when the A/D is enabled and active
0 = Band gap is not enabled by the A/D
bit 11-10 Unimplemented: Read as ‘0’
bit 9-8 ASINT<1:0>: Auto-Scan (Threshold Detect) Interrupt Mode bits
11 = Interrupt after Threshold Detect sequence completed and valid compare has occurred
10 = Interrupt after valid compare has occurred
01 = Interrupt after Threshold Detect sequence completed
00 = No interrupt
bit 7-4 Unimplemented: Read as ‘0’
bit 3-2 WM<1:0>: Write Mode bits
11 = Reserved
10 = Auto-compare only (conversion results are not saved, but interrupts are generated when a valid
match occurs, as defined by the CM and ASINT bits)
01 = Convert and save (conversion results are saved to locations as determined by the register bits
when a match occurs, as defined by the CM bits)
00 = Legacy operation (conversion data is saved to a location determined by the buffer register bits)
bit 1-0 CM<1:0>: Compare Mode bits
11
= Outside Window mode (valid match occurs if the conversion result is outside of the window defined by
the corresponding buffer pair)
10
= Inside Window mode (valid match occurs if the conversion result is inside the window defined by the
corresponding buffer pair)
01
= Greater Than mode (valid match occurs if the result is greater than the value in the corresponding
buffer register)
00
= Less Than mode (valid match occurs if the result is less than the value in the corresponding buffer
register)
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REGISTER 24-6: AD1CHS: A/D SAMPLE SELECT REGISTER
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
CH0NB2 CH0NB1 CH0NB0 CH0SB4 CH0SB3 CH0SB2 CH0SB1 CH0SB0
bit 15 bit 8
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
CH0NA2 CH0NA1 CH0NA0 CH0SA4 CH0SA3 CH0SA2 CH0SA1 CH0SA0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-13 CH0NB<2:0>: Sample B Channel 0 Negative Input Select bits
1xx = Unimplemented
011 = Unimplemented
010 =AN1
001 = Unimplemented
000 =V
REF-/AVSS
bit 12-8 CH0SB<4:0>: Sample B Channel 0 Positive Input Select bits
11111 =VBAT/2(1)
11110 =AVDD(1)
11101 =AVSS(1)
11100 = Band gap reference (VBG)(1)
11011 =VBG/2(1)
11010 =VBG/6(1)
11001 =CTMU
11000 = CTMU temperature sensor input (does not require AD1CTMENH<8> to be set)
10111 =AN23
(2)
10110 =AN22
(2)
10101 =AN21
(2)
10100 =AN20
(2)
10011 =AN19
(2)
10010 =AN18
(2)
10001 =AN17
(2)
10000 =AN16
(2)
01111 =AN15
01110 =AN14
01101 =AN13
01100 =AN12
01011 =AN11
01010 =AN10
01001 =AN9
01000 =AN8
00111 =AN7
00110 =AN6
00101 =AN5
00100 =AN4
00011 =AN3
00010 =AN2
00001 =AN1
00000 =AN0
Note 1: These input channels do not have corresponding memory mapped result buffers.
2: These channels are implemented in 100-pin devices only.
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bit 7-5 CH0NA<2:0>: Sample A Channel 0 Negative Input Select bits
Same definitions as for CHONB<2:0>.
bit 4-0 CH0SA<4:0>: Sample A Channel 0 Positive Input Select bits
Same definitions as for CHOSB<4:0>.
REGISTER 24-6: AD1CHS: A/D SAMPLE SELECT REGISTER (CONTINUED)
Note 1: These input channels do not have corresponding memory mapped result buffers.
2: These channels are implemented in 100-pin devices only.
REGISTER 24-7: ANCFG: A/D BAND GAP REFERENCE CONFIGURATION
U-0 U-0 U-0 U-0 U-0 U-0 U-0 U-0
— — — — — — — —
bit 15 bit 8
U-0 U-0 U-0 U-0 U-0 R/W-0 R/W-0 R/W-0
— — — — — VBG6EN VBG2EN VBGEN
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-3 Unimplemented: Read as ‘0’
bit 2 VBG6EN: A/D Input VBG/6 Enable bit
1 = Band gap voltage, divided by six reference (VBG/6), is enabled
0 = Band gap, divided by six reference (VBG/6), is disabled
bit 1 VBG2EN: A/D Input VBG/6 Enable bit
1 = Band gap voltage, divided by two reference (VBG/6), is enabled
0 = Band gap, divided by two reference (VBG/6), is disabled
bit 0 VBGEN: A/D Input VBG/6 Enable bit
1 = Band gap voltage reference (VBG/6) is enabled
0 = Band gap reference (VBG/6) is disabled
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REGISTER 24-8: AD1CHITH: A/D SCAN COMPARE HIT REGISTER (HIGH WORD)
U-0 U-0 U-0 U-0 U-0 U-0 R/W-0 R/W-0
— — — — — — CHH25 CHH24
bit 15 bit 8
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
CHH23 CHH22 CHH21 CHH20 CHH19 CHH18 CHH17 CHH16
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-10 Unimplemented: Read as ‘0’
bit 9-0 CHH<25:16>: A/D Compare Hit bits
If CM<1:0> = 11:
1 = A/D Result Buffer n has been written with data or a match has occurred
0 = A/D Result Buffer n has not been written with data
For All Other Values of CM<1:0>:
1 = A match has occurred on A/D Result Channel n
0 = No match has occurred on A/D Result Channel n
REGISTER 24-9: AD1CHITL: A/D SCAN COMPARE HIT REGISTER (LOW WORD)
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
CHH15 CHH14 CHH13 CHH12 CHH11 CHH10 CHH9 CHH8
bit 15 bit 8
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
CHH7 CHH6 CHH5 CHH4 CHH3 CHH2 CHH1 CHH0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-0 CHH<15:0>: A/D Compare Hit bits
If CM<1:0> = 11:
1 = A/D Result Buffer n has been written with data or a match has occurred
0 = A/D Result Buffer n has not been written with data
For all other values of CM<1:0>:
1 = A match has occurred on A/D Result Channel n
0 = No match has occurred on A/D Result Channel n
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REGISTER 24-10: AD1CSSH: A/D INPUT SCAN SELECT REGISTER (HIGH WORD)
U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
— CSS30 CSS29 CSS28 CSS27 CSS26 CSS25 CSS24
bit 15 bit 8
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
CSS23 CSS22 CSS21 CSS20 CSS19 CSS18 CSS17 CSS16
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 Unimplemented: Read as ‘0’
bit 14-0 CSS<30:16>: A/D Input Scan Selection bits
1 = Include corresponding channel for input scan
0 = Skip channel for input scan
REGISTER 24-11: AD1CSSL: A/D INPUT SCAN SELECT REGISTER (LOW WORD)
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
CSS15 CSS14 CSS13 CSS12 CSS11 CSS10 CSS9 CSS8
bit 15 bit 8
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
CSS7 CSS6 CSS5 CSS4 CSS3 CSS2 CSS1 CSS0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-0 CSS<15:0>: A/D Input Scan Selection bits
1 = Include corresponding channel for input scan
0 = Skip channel for input scan
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REGISTER 24-12: AD1CTMENH: CTMU ENABLE REGISTER (HIGH WORD)(1)
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
— CTMEN30 CTMEN29 CTMEN28 CTMEN27 CTMEN26 CTMEN25 CTMEN24
bit 15 bit 8
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
CTMEN23 CTMEN22 CTMEN21 CTMEN20 CTMEN19 CTMEN18 CTMEN17 CTMEN16
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-0 CTMEN<31:16>: CTMU Enabled During Conversion bits
1 = CTMU is enabled and connected to the selected channel during conversion
0 = CTMU is not connected to this channel
Note 1: The actual number of channels available depends on which channels are implemented on a specific
device; refer to the device data sheet for details. Unimplemented channels are read as ‘0’.
REGISTER 24-13: AD1CTMENL: CTMU ENABLE REGISTER (LOW WORD)(1)
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
CTMEN15 CTMEN14 CTMEN13 CTMEN12 CTMUEN11 CTMEN10 CTMEN9 CTMEN8
bit 15 bit 8
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
CTMEN7 CTMEN6 CTMEN5 CTMEN4 CTMEN3 CTMEN2 CTMEN1 CTMEN0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-0 CTMEN<15:0>: CTMU Enabled During Conversion bits
1 = CTMU is enabled and connected to the selected channel during conversion
0 = CTMU is not connected to this channel
Note 1: The actual number of channels available depends on which channels are implemented on a specific
device; refer to the device data sheet for details. Unimplemented channels are read as ‘0’.
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FIGURE 24-3: 10-BIT A/D CONVERTER ANALOG INPUT MODEL
EQUATION 24-1: A/D CONVERSION CLOCK PERIOD
CPIN
VA
Rs ANx
ILEAKAGE
RIC 250Sampling
Switch
RSS
CHOLD
VSS
= 4.4 pF
500 nA
Legend: CPIN
VT
ILEAKAGE
RIC
RSS
CHOLD
= Input Capacitance
= Threshold Voltage
= Leakage Current at the pin due to
= Interconnect Resistance
= Sampling Switch Resistance
= Sample/Hold Capacitance (from DAC)
various junctions
Note: The CPIN value depends on the device package and is not tested. The effect of CPIN is negligible if Rs 5 k.
RSS 3 k
TCY (ADCS + 1)
ADCS = – 1
TAD
TCY
Note: Based on TCY = 2/FOSC; Doze mode and PLL are disabled.
TAD =
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FIGURE 24-4: 12-BIT A/D TRANSFER FUNCTION
0010 0000 0001 (2049)
0010 0000 0010 (2050)
0010 0000 0011 (2051)
0001 1111 1101 (2045)
0001 1111 1110 (2046)
0001 1111 1111 (2047)
1111 1111 1110 (4094)
1111 1111 1111 (4095)
0000 0000 0000 (0)
0000 0000 0001 (1)
Output Code
0010 0000 0000 (2048)
(VINH – VINL)
VR-
VR+ – VR-
4096
2048 * (VR+ – VR-)
4096
VR+
VR- +
VR-+
4095 * (VR+ – VR-)
4096
VR- +
0
(Binary (Decimal))
Voltage Level
2010-2011 Microchip Technology Inc. DS39996F-page 313
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FIGURE 24-5: 10-BIT A/D TRANSFER FUNCTION
10 0000 0001 (513)
10 0000 0010 (514)
10 0000 0011 (515)
01 1111 1101 (509)
01 1111 1110 (510)
01 1111 1111 (511)
11 1111 1110 (1022)
11 1111 1111 (1023)
00 0000 0000 (0)
00 0000 0001 (1)
Output Code
10 0000 0000 (512)
(VINH – VINL)
VR-
VR+ – VR-
1024
512 * (VR+ – VR-)
1024
VR+
VR- +
VR-+
1023 * (VR+ – VR-)
1024
VR- +
0
(Binary (Decimal))
Voltage Level
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NOTES:
2010-2011 Microchip Technology Inc. DS39996F-page 315
PIC24FJ128GA310 FAMILY
25.0 TRIPLE COMPARATOR
MODULE
The triple comparator module provides three dual input
comparators. The inputs to the comparator can be
configured to use any one of five external analog inputs
(CxINA, CxINB, CxINC, CxIND and VREF+) and a
voltage reference input from one of the internal band
gap references or the comparator voltage reference
generator (VBG, VBG/2, VBG/6 and CVREF).
The comparator outputs may be directly connected to
the CxOUT pins. When the respective COE equals ‘1’,
the I/O pad logic makes the unsynchronized output of
the comparator available on the pin.
A simplified block diagram of the module in shown in
Figure 25-1. Diagrams of the possible individual
comparator configurations are shown in Figure 25-2.
Each comparator has its own control register,
CMxCON (Register 25-1), for enabling and configuring
its operation. The output and event status of all three
comparators is provided in the CMSTAT register
(Register 25-2).
FIGURE 25-1: TRIPL E COMPARATOR MODULE BLOCK DIAGRAM
Note: This data sheet summarizes the features of
this group of PIC24F devices. It is not
intended to be a comprehensive reference
source. For more information, refer to the
“PIC24F Family Reference Manual”,
Section 46. “Scalable Comparator
Module” (DS39734). The information in
this data sheet supersedes the information
in the FRM.
C1
VIN-
VIN+
CXINB
CXINC
CXINA
CXIND
CVREF
VBG
C2
VIN-
VIN+
C3
VIN-
VIN+
COE
C1OUT
Pin
CPOL
Trigger/Interrupt
Logic
CEVT
EVPOL<1:0>
COUT
Input
Select
Logic
CCH<1:0>
CREF
COE
C2OUT
Pin
CPOL
Trigger/Interrupt
Logic
CEVT
EVPOL<1:0>
COUT
COE
C3OUT
Pin
CPOL
Trigger/Interrupt
Logic
CEVT
EVPOL<1:0>
COUT
VBG/2
VBG/6
VREF+
-
CVREFM<1:0>(1)
VREF+
CVREFP(1)
+
01
00
10
11
01
00
10
11
1
0
0
1
Note 1: Refer to the CVRCON register (Register 26-1) for bit details.
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FIGURE 25-2: INDIVIDUAL COMPARATOR CONFIGURATIONS WHEN CREF = 0
Cx
VIN-
VIN+Off (Read as ‘0’)
Comparator Off
CEN = 0, CREF = x, CCH<1:0> = xx
Comparator CxINB > CxINA Compare
CEN = 1, CCH<1:0> = 00, CVREFM<1:0> = xx
COE
CxOUT
Cx
VIN-
VIN+
COE
CXINB
CXINA
Comparator CxIND > CxINA Compare
CEN = 1, CCH<1:0> = 10, CVREF M<1:0> = xx
Cx
VIN-
VIN+
COE
CxOUT
CXIND
CXINA
Comparator CxINC > CxINA Compare
Cx
VIN-
VIN+
COE
CXINC
CXINA
Comparator VBG > CxINA Compare
Cx
VIN-
VIN+
COE
VBG
CXINA
Pin
Pin
CxOUT
Pin
CxOUT
Pin
CxOUT
Pin
Comparator VBG > CxINA Compare
CEN = 1, CCH<1:0> = 11, CVREFM<1:0> = 01
Cx
VIN-
VIN+
COE
VBG/2
CXINA CxOUT
Pin
Comparator VBG > CxINA Compare
Cx
VIN-
VIN+
COE
VBG/6
CXINA CxOUT
Pin
Comparator CxIND > CxINA Compare
Cx
VIN-
VIN+
COE
CxOUT
VREF+
CXINA
Pin
CEN = 1, CCH<1:0> = 11, CVREFM<1:0> = 11
CEN = 1, CCH<1:0> = 01, CVREFM<1:0> = xx
CEN = 1, CCH<1:0> = 11, CVREFM<1:0> = 00
CEN = 1, CCH<1:0> = 11, CVREFM<1:0> = 10
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FIGURE 25-3: INDIVIDUAL COMPARATOR CONFIGURATIONS WHEN CREF = 1 AND CVREFP = 0
FIGURE 25-4: INDIVIDUAL COMPARATOR CONFIGURATIONS WHEN CREF = 1 AND CVREFP = 1
Comparator CxIND > CVREF Compare
Cx
VIN-
VIN+
COE
CXIND
CVREF CxOUT
Pin
Comparator VBG > CVREF Compare
Cx
VIN-
VIN+
COE
VBG
CVREF CxOUT
Pin
Comparator CxINC > CVREF Compare
Cx
VIN-
VIN+
COE
CXINC
CVREF CxOUT
Pin
Comparator CxINB > CVREF Compare
CEN = 1, CCH<1:0> = 00, CVREFM<1:0> = xx
Cx
VIN-
VIN+
COE
CXINB
CVREF CxOUT
Pin
Comparator VBG > CVREF Compare
Cx
VIN-
VIN+
COE
VBG/2
CVREF CxOUT
Pin
Comparator VBG > CVREF Compare
Cx
VIN-
VIN+
COE
VBG/6
CVREF CxOUT
Pin
Comparator CxIND > CVREF Compare
Cx
VIN-
VIN+
COE
VREF+
CVREF CxOUT
Pin
CEN = 1, CCH<1:0> = 10, CVREFM<1:0> = xx
CEN = 1, CCH<1:0> = 11, CVREFM<1:0> = 01
CEN = 1, CCH<1:0> = 11, CVREFM<1:0> = 11
CEN = 1, CCH<1:0> = 11, CVREFM<1:0> = 10
CEN = 1, CCH<1:0> = 11, CVREFM<1:0> = 00
CEN = 1, CCH<1:0> = 01, CVREFM<1:0> = xx
Comparator CxIND > CVREF Compare
Cx
VIN-
VIN+
COE
CXIND
VREF+CxOUT
Pin
Comparator VBG > CVREF Compare
Cx
VIN-
VIN+
COE
VBG
VREF+CxOUT
Pin
Comparator CxINC > CVREF Compare
Cx
VIN-
VIN+
COE
CXINC
VREF+CxOUT
Pin
Comparator CxINB > CVREF Compare
Cx
VIN-
VIN+
COE
CXINB
VREF+CxOUT
Pin
Comparator VBG > CVREF Compare
Cx
VIN-
VIN+
COE
VBG/2
VREF+CxOUT
Pin
Comparator VBG > CVREF Compare
Cx
VIN-
VIN+
COE
VBG/6
VREF+CxOUT
Pin
CEN = 1, CCH<1:0> = 00, CVREFM<1:0> = xx
CEN = 1, CCH<1:> = 10, CVREFM<1:0> = xx
CEN = 1, CCH<1:0> = 11, CVREFM<1:0> = 01 CEN = 1, CCH<1:0> = 11, CVREFM<1:0> = 10
CEN = 1, CCH<1:0> = 11, CVREFM<1:0> = 00
CEN = 1, CCH<1:0> = 01, CVREFM<1:0> = xx
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REGISTER 25-1: CMxCON: COMPARATOR x CONTROL REGISTERS
(COMPARATORS 1 THROUGH 3)
R/W-0 R/W-0 R/W-0 U-0 U-0 U-0 R/W-0, HS R-0, HSC
CEN COE CPOL — — — CEVT COUT
bit 15 bit 8
R/W-0 R/W-0 U-0 R/W-0 U-0 U-0 R/W-0 R/W-0
EVPOL1 EVPOL0 — CREF —— CCH1 CCH0
bit 7 bit 0
Legend: HS = Hardware Settable bit HSC = Hardware Settable/Clearable bit
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 CEN: Comparator Enable bit
1 = Comparator is enabled
0 = Comparator is disabled
bit 14 COE: Comparator Output Enable bit
1 = Comparator output is present on the CxOUT pin
0 = Comparator output is internal only
bit 13 CPOL: Comparator Output Polarity Select bit
1 = Comparator output is inverted
0 = Comparator output is not inverted
bit 12-10 Unimplemented: Read as ‘0’
bit 9 CEVT: Comparator Event bit
1 = Comparator event that is defined by EVPOL<1:0> has occurred; subsequent triggers and interrupts
are disabled until the bit is cleared
0 = Comparator event has not occurred
bit 8 COUT: Comparator Output bit
When CPOL = 0:
1 =VIN+ > VIN-
0 =V
IN+ < VIN-
When CPOL = 1:
1 =VIN+ < VIN-
0 =V
IN+ > VIN-
bit 7-6 EVPOL<1:0>: Trigger/Event/Interrupt Polarity Select bits
11 = Trigger/event/interrupt is generated on any change of the comparator output (while CEVT = 0)
10 = Trigger/event/interrupt is generated on transition of the comparator output:
If CPOL = 0 (non-inverted polarity):
High-to-low transition only.
If CPOL = 1 (inverted polarity):
Low-to-high transition only.
01 = Trigger/event/interrupt is generated on transition of comparator output:
If CPOL = 0 (non-inverted polarity):
Low-to-high transition only.
If CPOL = 1 (inverted polarity):
High-to-low transition only.
00 = Trigger/event/interrupt generation is disabled
bit 5 Unimplemented: Read as ‘0’
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bit 4 CREF: Comparator Reference Select bits (non-inverting input)
1 = Non-inverting input connects to the internal CVREF voltage
0 = Non-inverting input connects to the CXINA pin
bit 3-2 Unimplemented: Read as ‘0’
bit 1-0 CCH<1:0>: Comparator Channel Select bits
11 = Inverting input of the comparator connects to the internal selectable reference voltage specified
by the CVREFM<1:0> bits in the CVRCON register
10 = Inverting input of the comparator connects to the CXIND pin
01 = Inverting input of the comparator connects to the CXINC pin
00 = Inverting input of the comparator connects to the CXINB pin
REGISTER 25-1: CMxCON: COMPARATOR x CONTROL REGISTERS
(COMPARATORS 1 THROUGH 3) (CONTINUED)
REGISTER 25-2: CMSTAT: COMPARATOR MODULE STATUS REGISTER
R/W-0 U-0 U-0 U-0 U-0 R-0, HSC R-0, HSC R-0, HSC
CMIDL — — — — C3EVT C2EVT C1EVT
bit 15 bit 8
U-0 U-0 U-0 U-0 U-0 R-0, HSC R-0, HSC R-0, HSC
— — — — — C3OUT C2OUT C1OUT
bit 7 bit 0
Legend: HSC = Hardware Settable/Clearable bit
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 CMIDL: Comparator Stop in Idle Mode bit
1 = Discontinue operation of all comparators when device enters Idle mode
0 = Continue operation of all enabled comparators in Idle mode
bit 14-11 Unimplemented: Read as ‘0’
bit 10 C3EVT: Comparator 3 Event Status bit (read-only)
Shows the current event status of Comparator 3 (CM3CON<9>).
bit 9 C2EVT: Comparator 2 Event Status bit (read-only)
Shows the current event status of Comparator 2 (CM2CON<9>).
bit 8 C1EVT: Comparator 1 Event Status bit (read-only)
Shows the current event status of Comparator 1 (CM1CON<9>).
bit 7-3 Unimplemented: Read as ‘0’
bit 2 C3OUT: Comparator 3 Output Status bit (read-only)
Shows the current output of Comparator 3 (CM3CON<8>).
bit 1 C2OUT: Comparator 2 Output Status bit (read-only)
Shows the current output of Comparator 2 (CM2CON<8>).
bit 0 C1OUT: Comparator 1 Output Status bit (read-only)
Shows the current output of Comparator 1 (CM1CON<8>).
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NOTES:
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26.0 COMPARATOR VOLTAGE
REFERENCE 26.1 Configuring the Comparator
Voltage Reference
The voltage reference module is controlled through the
CVRCON register (Register 26-1). The comparator
voltage reference provides two ranges of output
voltage, each with 16 distinct levels. The range to be
used is selected by the CVRR bit (CVRCON<5>). The
primary difference between the ranges is the size of the
steps selected by the CVREF Selection bits
(CVR<3:0>), with one range offering finer resolution.
The comparator reference supply voltage can come
from either VDD and VSS, or the external VREF+ and
VREF-. The voltage source is selected by the CVRSS
bit (CVRCON<4>).
The settling time of the comparator voltage reference
must be considered when changing the CVREF
output.
FIGURE 26-1: COMPARATOR VOLTAGE REFERENCE BLOCK DIAGRAM
Note: This data sheet summarizes the features of
this group of PIC24F devices. It is not
intended to be a comprehensive reference
source. For more information, refer to the
“PIC24F Family Reference Manual”,
Section 19. “Dual Comparator Module”
(DS39710). The information in this data
sheet supersedes the information in the
FRM.
16-to-1 MUX
CVR<3:0>
8R
R
CVREN
CVRSS = 0
AVDD
VREF+CVRSS = 1
8R
CVRSS = 0
VREF-CVRSS = 1
R
R
R
R
R
R
16 Steps
CVRR
CVREF
AVSS
CVROE
CVREF
Pin
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REGISTER 26-1: CVRCON: COMPARATOR VOLTAGE REFERENCE CONTROL REGISTER
U-0 U-0 U-0 U-0 U-0 R/W-0 R/W-0 R/W-0
— — — — — CVREFP CVREFM1 CVREFM0
bit 15 bit 8
R/W
-0
R/W
-0
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
CVREN CVROE CVRR CVRSS CVR3 CVR2 CVR1 CVR0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-11 Unimplemented: Read as ‘0’
bit 10 CVREFP: Voltage Reference Select bit (valid only when CREF is ‘1’)
1 =V
REF+ is used as a reference voltage to the comparators
0 = The CVR (4-bit DAC) within this module provides the the reference voltage to the comparators
bit 9-8 CVREFM<1:0>: Band Gap Reference Source Select bits (valid only when CCH<1:0> = 11)
00 = Band gap voltage is provided as an input to the comparators
01 = Band gap voltage, divided by two, is provided as an input to the comparators
10 = Band gap voltage, divided by six, is provided as an input to the comparators
11 = V
REF+ pin is provided as an input to the comparators
bit 7 CVREN: Comparator Voltage Reference Enable bit
1 =CVREF circuit is powered on
0 =CV
REF circuit is powered down
bit 6 CVROE: Comparator VREF Output Enable bit
1 =CVREF voltage level is output on the CVREF pin
0 =CV
REF voltage level is disconnected from the CVREF pin
bit 5 CVRR: Comparator VREF Range Selection bit
1 =CV
RSRC range should be 0 to 0.625 CVRSRC with CVRSRC/24 step size
0 =CV
RSRC range should be 0.25 to 0.719 CVRSRC with CVRSRC/32 step size
bit 4 CVRSS: Comparator VREF Source Selection bit
1 = Comparator reference source, CVRSRC = VREF+ – VREF-
0 = Comparator reference source, CVRSRC = AVDD – AVSS
bit 3-0 CVR<3:0>: Comparator VREF Value Selection 0 CVR<3:0> 15 bits
When CVRR = 1:
CVREF = (CVR<3:0>/24) (CVRSRC)
When CVRR = 0:
CVREF = 1/4 (CVRSRC) + (CVR<3:0>/32) (CVRSRC)
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27.0 CHARGE TIME
MEASUREMENT UNIT (CTMU)
The Charge Time Measurement Unit (CTMU) is a
flexible analog module that provides charge
measurement, accurate differential time measurement
between pulse sources and asynchronous pulse
generation. Its key features include:
• Thirteen external edge input trigger sources
• Polarity control for each edge source
• Control of edge sequence
• Control of response to edge levels or edge
transitions
• Time measurement resolution of one nanosecond
• Accurate current source suitable for capacitive
measurement
Together with other on-chip analog modules, the CTMU
can be used to precisely measure time, measure
capacitance, measure relative changes in capacitance
or generate output pulses that are independent of the
system clock. The CTMU module is ideal for interfacing
with capacitive-based touch sensors.
The CTMU is controlled through three registers:
CTMUCON1, CTMUCON2 and CTMUICON.
CTMUCON1 enables the module and controls the mode
of operation of the CTMU, as well as controlling edge
sequencing. CTMUCON2 controls edge source selec-
tion and edge source polarity selection. The CTMUICON
register selects the current range of current source and
trims the current.
27.1 Measuring Capacitance
The CTMU module measures capacitance by
generating an output pulse with a width equal to the
time between edge events on two separate input
channels. The pulse edge events to both input
channels can be selected from four sources: two
internal peripheral modules (OC1 and Timer1) and up
to 13 external pins (CTEDG1 through CTEDG13). This
pulse is used with the module’s precision current
source to calculate capacitance according to the
relationship:
EQUATION 27-1:
For capacitance measurements, the A/D Converter
samples an external capacitor (CAPP) on one of its
input channels after the CTMU output’s pulse. A
precision resistor (RPR) provides current source
calibration on a second A/D channel. After the pulse
ends, the converter determines the voltage on the
capacitor. The actual calculation of capacitance is
performed in software by the application.
Figure 27-1 illustrates the external connections used
for capacitance measurements, and how the CTMU
and A/D modules are related in this application. This
example also shows the edge events coming from
Timer1, but other configurations using external edge
sources are possible. A detailed discussion on
measuring capacitance and time with the CTMU
module is provided in the “PIC24F Family Reference
Manual”, Section 11. “Charge Time Measurement
Unit (CTMU)”.
Note: This data sheet summarizes the features of
this group of PIC24F devices. It is not
intended to be a comprehensive reference
source. For more information on the
Charge Measurement Unit, refer to the
“PIC24F Family Reference Manual”,
Section 11. “Charge Time Measurem ent
Unit (CTMU)” (DS39724).
IC
dV
dT
-------=
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FIGURE 27-1: TYPICAL CONNECTIONS AND INTERNAL CONFIGURATION FOR
CAPACITANCE MEASUREMENT
27.2 Measuring T ime
Time measurements on the pulse width can be similarly
performed using the A/D module’s internal capacitor
(CAD) and a precision resistor for current calibration.
Figure 27-2 displays the external connections used for
time measurements, and how the CTMU and A/D
modules are related in this application. This example
also shows both edge events coming from the external
CTEDG pins, but other configurations using internal
edge sources are possible.
27.3 Pulse Generation and Delay
The CTMU module can also generate an output pulse
with edges that are not synchronous with the device’s
system clock. More specifically, it can generate a pulse
with a programmable delay from an edge event input to
the module.
When the module is configured for pulse generation
delay by setting the TGEN bit (CTMUCON1<12>), the
internal current source is connected to the B input of
Comparator 2. A capacitor (CDELAY) is connected to
the Comparator 2 pin, C2INB, and the comparator
voltage reference, CVREF, is connected to C2INA.
CVREF is then configured for a specific trip point. The
module begins to charge CDELAY when an edge event
is detected. When CDELAY charges above the CVREF
trip point, a pulse is output on CTPLS. The length of the
pulse delay is determined by the value of CDELAY and
the CVREF trip point.
Figure 27-3 illustrates the external connections for
pulse generation, as well as the relationship of the
different analog modules required. While CTED1 is
shown as the input pulse source, other options are
available. A detailed discussion on pulse generation
with the CTMU module is provided in the “PIC24F
Family Reference Manual”.
PIC24F Device
A/D Converter
CTMU
ANx
CAPP
Output Pulse
EDG1
EDG2
RPR
ANY
Timer1
Current Source
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FIGURE 27-2: TYPICAL CONNECTIONS AND INTERNAL CONFIGURATION FOR TIME
MEASUREMENT
FIGURE 27-3: TYPICAL CONNECTIONS AND INTERNAL CONFIGURATION FOR PULSE
DELAY GENERATION
PIC24F Device
A/D Converter
CTMU
CTEDX
CTEDX
ANx
Output Pulse
EDG1
EDG2
CAD
RPR
Current Source
C2
CVREF
CTPLS
PIC24F Device
Current Source
Comparator
CTMU
CTEDX
C2INB
CDELAY
EDG1
-
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REGISTER 27-1: CTMUCON1: CTMU CONTROL REGISTER 1
R/W-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
CTMUEN — CTMUSIDL TGEN EDGEN EDGSEQEN IDISSEN CTTRIG
bit 15 bit 8
U-0 U-0 U-0 U-0 U-0 U-0 U-0 U-0
— — — — — — — —
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 CTMUEN: CTMU Enable bit
1 = Module is enabled
0 = Module is disabled
bit 14 Unimplemented: Read as ‘0’
bit 13 CTMUSIDL: Stop in Idle Mode bit
1 = Discontinue module operation when device enters Idle mode
0 = Continue module operation in Idle mode
bit 12 TGEN: Time Generation Enable bit
1 = Enables edge delay generation
0 = Disables edge delay generation
bit 11 EDGEN: Edge Enable bit
1 = Edges are not blocked
0 = Edges are blocked
bit 10 EDGSEQEN: Edge Sequence Enable bit
1 = Edge 1 event must occur before Edge 2 event can occur
0 = No edge sequence is needed
bit 9 IDISSEN: Analog Current Source Control bit
1 = Analog current source output is grounded
0 = Analog current source output is not grounded
bit 8 CTTRIG: Trigger Control bit
1 = Trigger output is enabled
0 = Trigger output is disabled
bit 7-0 Unimplemented: Read as ‘0’
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REGISTER 27-2: CTMUCON2: CTMU CONTROL REGISTER 2
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
EDG1MOD EDG1POL EDG1SEL3 EDG1SEL2 EDG1SEL1 EDG1SEL0 EDG2STAT EDG1STAT
bit 15 bit 8
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 U-0 U-0
EDG2MOD EDG2POL EDG2SEL3 EDG2SEL2 EDG2SEL1 EDG2SEL0 — —
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 EDG1MOD: Edge 1 Edge-Sensitive Select bit
1 = Input is edge-sensitive
0 = Input is level-sensitive
bit 14 EDG1POL: Edge 1 Polarity Select bit
1 = Edge 1 is programmed for a positive edge response
0 = Edge 1 is programmed for a negative edge response
bit 13-10 EDG1SEL<3:0>: Edge 1 Source Select bits
1111 = Edge 1 source is Comparator 3 output
1110 = Edge 1 source is Comparator 2 output
1101 = Edge 1 source is Comparator 1 output
1100 = Edge 1 source is IC3
1011 = Edge 1 source is IC2
1010 = Edge 1 source is IC1
1001 = Edge 1 source is CTED8
1000 = Edge 1 source is CTED7(1)
0111 = Edge 1 source is CTED6
0110 = Edge 1 source is CTED5
0101 = Edge 1 source is CTED4
0100 = Edge 1 source is CTED3(1)
0011 = Edge 1 source is CTED1
0010 = Edge 1 source is CTED2
0001 = Edge 1 source is OC1
0000 = Edge 1 source is Timer1
bit 9 EDG2STAT: Edge 2 Status bit
Indicates the status of Edge 2 and can be written to control current source.
1 = Edge 2 has occurred
0 = Edge 2 has not occurred
bit 8 EDG1STAT: Edge 1 Status bit
Indicates the status of Edge 1 and can be written to control current source.
1 = Edge 1 has occurred
0 = Edge 1 has not occurred
bit 7 EDG2MOD: Edge 2 Edge-Sensitive Select bit
1 = Input is edge-sensitive
0 = Input is level-sensitive
bit 6 EDG2POL: Edge 2 Polarity Select bit
1 = Edge 2 is programmed for a positive edge
0 = Edge 2 is programmed for a positive edge
Note 1: Edge sources, CTED3, CTED7, CTED10 and CTED11, are available in 100-pin devices only.
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bit 5-2 EDG2SEL<3:0>: Edge 2 Source Select bits
1111 = Edge 2 source is Comparator 3 output
1110 = Edge 2 source is Comparator 2 output
1101 = Edge 2 source is Comparator 1 output
1100 = Unimplemented Do not use
1011 = Edge 2 source is IC3
1010 = Edge 2 source is IC2
1001 = Edge 2 source is IC1
1000 = Edge 2 source is CTED13
0111 = Edge 2 source is CTED12
0110 = Edge 2 source is CTED11(1)
0101 = Edge 2 source is CTED10(1)
0100 = Edge 2 source is CTED9
0011 = Edge 2 source is CTED1
0010 = Edge 2 source is CTED2
0001 = Edge 2 source is OC1
0000 = Edge 2 source is Timer1
bit 1-0 Unimplemented: Read as ‘0’
REGISTER 27-2: CTMUCON2: CTMU CONTROL REGISTER 2 (CONTINUED)
Note 1: Edge sources, CTED3, CTED7, CTED10 and CTED11, are available in 100-pin devices only.
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REGISTER 27-3: CTMUICON: CTMU CURRENT CONTROL REGISTER
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
ITRIM5 ITRIM4 ITRIM3 ITRIM2 ITRIM1 ITRIM0 IRNG1 IRNG0
bit 15 bit 8
U-0 U-0 U-0 U-0 U-0 U-0 U-0 U-0
— — — — — — — —
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-10 ITRIM<5:0>: Current Source Trim bits
011111 = Maximum positive change from nominal current
011110
.
.
.
000001 = Minimum positive change from nominal current
000000 = Nominal current output specified by IRNG<1:0>
111111 = Minimum negative change from nominal current
.
.
.
100010
100001 = Maximum negative change from nominal current
bit 9-8 IRNG<1:0>: Current Source Range Select bits
11 = 100 × Base Current
10 = 10 × Base Current
01 = Base current level (0.55 A nominal)
00 = 1000 x Base Current
bit 7-0 Unimplemented: Read as ‘0’
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NOTES:
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28.0 HIGH/LOW-VOLTAGE DETECT
(HLVD)
The High/Low-Voltage Detect (HLVD) module is a
programmable circuit that allows the user to specify
both the device voltage trip point and the direction of
change.
An interrupt flag is set if the device experiences an
excursion past the trip point in the direction of change.
If the interrupt is enabled, the program execution will
branch to the interrupt vector address and the software
can then respond to the interrupt.
The HLVD Control register (see Register 28-1)
completely controls the operation of the HLVD module.
This allows the circuitry to be “turned off” by the user
under software control, which minimizes the current
consumption for the device.
FIGURE 28-1: HIGH/LOW-VOLTAGE DETECT (HLVD) MODULE BLOCK DIAGRAM
Note: This data sheet summarizes the features
of this group of PIC24F devices. It is not
intended to be a comprehensive
reference source. For more information
on the High/Low-Voltage Detect, refer to
the “PIC24F Family Reference Manual”,
Section 36. “High-Level Integration
with Programmable High/Low-Voltage
Detect (HLVD)” (DS39725).
Set
VDD
16-to-1 MUX
HLVDEN
HLVDL<3:0>
LVDIN
VDD
Externally Generated
Trip Point
HLVDIF
HLVDEN
Band Gap
VDIR
1.2V Typical
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DS39996F-page 332 2010-2011 Microchip Technology Inc.
REGISTER 28-1: HLVDCON: HIGH/LOW-VOLTAGE DETECT CONTROL REGISTER
R/W-0 U-0 R/W-0 U-0 U-0 U-0 U-0 U-0
HLVDEN —LSIDL—————
bit 15 bit 8
R/W-0
R/W-0 R/W-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0
VDIR BGVST IRVST — HLVDL3 HLVDL2 HLVDL1 HLVDL0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 HLVDEN: High/Low-Voltage Detect Power Enable bit
1 = HLVD is enabled
0 = HLVD is disabled
bit 14 Unimplemented: Read as ‘0’
bit 13 LSIDL: HLVD Stop in Idle Mode bit
1 = Discontinue module operation when device enters Idle mode
0 = Continue module operation in Idle mode
bit 12-8 Unimplemented: Read as ‘0’
bit 7 VDIR: Voltage Change Direction Select bit
1 = Event occurs when voltage equals or exceeds trip point (HLVDL<3:0>)
0 = Event occurs when voltage equals or falls below trip point (HLVDL<3:0>)
bit 6 BGVST: Band Gap Voltage Stable Flag bit
1 = Indicates that the band gap voltage is stable
0 = Indicates that the band gap voltage is unstable
bit 5 IRVST: Internal Reference Voltage Stable Flag bit
1 = Internal reference voltage is stable; the High-Voltage Detect logic generates the interrupt flag at the
specified voltage range
0 = Internal reference voltage is unstable; the High-Voltage Detect logic will not generate the interrupt
flag at the specified voltage range and the HLVD interrupt should not be enabled
bit 4 Unimplemented: Read as ‘0’
bit 3-0 HLVDL<3:0>: High/Low-Voltage Detection Limit bits
1111 = External analog input is used (input comes from the LVDIN pin)
1110 = Trip point 1(1)
1101 = Trip point 2(1)
1100 = Trip point 3(1)
.
.
.
0100 = Trip point 11(1)
00xx = Unused
Note 1: For the actual trip point, see Section 32.0 “Electrical Characteristics”.
2010-2011 Microchip Technology Inc. DS39996F-page 333
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29.0 SPECIAL FEATURES
PIC24FJ128GA310 family devices include several
features intended to maximize application flexibility and
reliability, and minimize cost through elimination of
external components. These are:
• Flexible Configuration
• Watchdog Timer (WDT)
• Code Protection
• JTAG Boundary Scan Interface
• In-Circuit Serial Programming™
• In-Circuit Emulation
29.1 Configuration Bits
The Configuration bits can be programmed (read as ‘0’),
or left unprogrammed (read as ‘1’), to select various
device configurations. These bits are mapped starting at
program memory location, F80000h. A detailed explana-
tion of the various bit functions is provided in
Register 29-1 through Register 29-6.
Note that address, F80000h, is beyond the user program
memory space. In fact, it belongs to the configuration
memory space (800000h-FFFFFFh) which can only be
accessed using table reads and table writes.
29.1.1 CONSIDERATIONS FOR
CONFIGURING PIC24FJ128GA310
FAMILY DEVICES
In PIC24FJ128GA310 family devices, the configuration
bytes are implemented as volatile memory. This means
that configuration data must be programmed each time
the device is powered up. Configuration data is stored
in the three words at the top of the on-chip program
memory space, known as the Flash Configuration
Words. Their specific locations are shown in
Table 29-1. These are packed representations of the
actual device Configuration bits, whose actual
locations are distributed among several locations in
configuration space. The configuration data is automat-
ically loaded from the Flash Configuration Words to the
proper Configuration registers during device Resets.
When creating applications for these devices, users
should always specifically allocate the location of the
Flash Configuration Word for configuration data. This is
to make certain that program code is not stored in this
address when the code is compiled.
The upper byte of all Flash Configuration Words in pro-
gram memory should always be ‘0000 0000’. This
makes them appear to be NOP instructions in the
remote event that their locations are ever executed by
accident. Since Configuration bits are not implemented
in the corresponding locations, writing ‘0’s to these
locations has no effect on device operation.
TABLE 29-1: FLASH CONFIGURATION WORD LOCATIONS FOR PIC24FJ128GA310 FAMILY
DEVICES
Note: This data sheet summarizes the features of
this group of PIC24F devices. It is not
intended to be a comprehensive reference
source. For more information, refer to the
following sections of the “PIC24F Family
Reference Manual”. The information in this
data sheet supersedes the information in
the FRMs.
•
Section 9. “W atchdog Timer (WDT)”
(DS39697)
•Section 32. “High-Level Device
Integration” (DS39719)
•Section 33. “Programming and
Diagnostics” (DS39716)
Note: Configuration data is reloaded on all types
of device Resets.
Note: Performing a page erase operation on the
last page of program memory clears the
Flash Configuration Words, enabling code
protection as a result. Therefore, users
should avoid performing page erase
operations on the last page of program
memory.
Device Configuration Wo rd Addresses
1234
PIC24FJ64GA3XX ABFEh ABFCh ABFAh ABF8h
PIC24FJ128GA3XX 157FEh 157FCh 157FAh 157F8h
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DS39996F-page 334 2010-2011 Microchip Technology Inc.
REGISTER 29-1: CW1: FLASH CONFIGURATION WORD 1
U-1 U-1 U-1 U-1 U-1 U-1 U-1 U-1
— — — — — — — —
bit 23 bit 16
r-x R/PO-1 R/PO-1 R/PO-1 R/PO-1 R/PO-1 R/PO-1 R/PO-1
r JTAGEN GCP GWRP DEBUG LPCFG ICS1 ICS0
bit 15 bit 8
R/PO-1 R/PO-1 R/PO-1 R/PO-1 R/PO-1 R/PO-1 R/PO-1 R/PO-1
WINDIS FWDTEN1 FWDTEN0
FWPSA WDTPS3 WDTPS2 WDTPS1 WDTPS0
bit 7 bit 0
Legend: r = Reserved bit
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 23-16 Unimplemented: Read as ‘1’
bit 15 Reserved: The value is unknown; program as ‘0’
bit 14 JTAGEN: JTAG Port Enable bit
1 = JTAG port is enabled
0 = JTAG port is disabled
bit 13 GCP: General Segment Program Memory Code Protection bit
1 = Code protection is disabled
0 = Code protection is enabled for the entire program memory space
bit 12 GWRP: General Segment Code Flash Write Protection bit
1 = Writes to program memory are allowed
0 = Writes to program memory are not allowed
bit 11 DEBUG: Background Debugger Enable bit
1 = Device resets into Operational mode
0 = Device resets into Debug mode
bit 10 LPCFG: Low-Voltage/Retention Regulator Configuration bit
1 = Low-voltage/retention regulator is always disabled
0 = Low-power, low-voltage/retention regulator is enabled and controlled in firmware by the RETEN bit
bit 9-8 ICS<1:0>: Emulator Pin Placement Select bits
11 = Emulator functions are shared with PGEC1/PGED1
10 = Emulator functions are shared with PGEC2/PGED2
01 = Emulator functions are shared with PGEC3/PGED3
00 = Reserved; do not use
bit 7 WINDIS: Windowed Watchdog Timer Disable bit
1 = Standard Watchdog Timer is enabled
0 = Windowed Watchdog Timer is enabled; (FWDTEN<1:0> must not be ‘00’)
bit 6-5 FWDTEN<1:0>: Watchdog Timer Configuration bits
11 = WDT is always enabled; SWDTEN bit has no effect
10 = WDT is enabled and controlled in firmware by the SWDTEN bit
01 = WDT is enabled only in Run mode and disabled in Sleep modes; SWDTEN bit is disabled
00 = WDT is disabled; SWDTEN bit is disabled
bit 4 FWPSA: WDT Prescaler Ratio Select bit
1 = Prescaler ratio of 1:128
0 = Prescaler ratio of 1:32
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bit 3-0 WDTPS<3:0>: Watchdog Timer Postscaler Select bits
1111 = 1:32,768
1110 = 1:16,384
1101 = 1:8,192
1100 = 1:4,096
1011 = 1:2,048
1010 = 1:1,024
1001 = 1:512
1000 = 1:256
0111 = 1:128
0110 = 1:64
0101 = 1:32
0100 = 1:16
0011 = 1:8
0010 = 1:4
0001 = 1:2
0000 = 1:1
REGISTER 29-1: CW1: FLASH CONFIGURATION WORD 1 (CONTINUED)
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DS39996F-page 336 2010-2011 Microchip Technology Inc.
REGISTER 29-2: CW2: FLASH CONFIGURATION WORD 2
U-1 U-1 U-1 U-1 U-1 U-1 U-1 U-1
— — — — — — — —
bit 23 bit 16
R/PO-1 r-1 r-1 R/PO-1 R/PO-1 R/PO-1 R/PO-1 R/PO-1
IESO rrALTVRF1ALTVRF0 FNOSC2 FNOSC1 FNOSC0
bit 15 bit 8
R/PO-1 R/PO-1 R/PO-1 R/PO-1 r-1 r-1 R/PO-1 R/PO-1
FCKSM1 FCKSM0
OSCIOFCN IOL1WAY
r r
POSCMD1 POSCMD0
bit 7 bit 0
Legend: r = Reserved bit
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 23-16 Unimplemented: Read as ‘1’
bit 15 IESO: Internal External Switchover bit
1 = IESO mode (Two-Speed Start-up) is enabled
0 = IESO mode (Two-Speed Start-up) is disabled
bit 14-13 Reserved: Always maintain as ‘1’
bit 12-11 ALTVRF<1:0>: Alternate VREF/CVREF Pins Selection bits
00 = Voltage reference input, A/D = RB0/RB1, Comparator = RB0/RB1
01 = Voltage reference input, A/D = RB0/RB1, Comparator = RA9, RA10
10 = Voltage reference input, A/D = RA9/RA10, Comparator = RB0, RB1
11 = Voltage reference input, A/D = RA9/RA10, Comparator = RA9, RA10
bit 10-8 FNOSC<2:0>: Initial Oscillator Select bits
111 = Fast RC Oscillator with Postscaler (FRCDIV)
110 = Reserved
101 = Low-Power RC Oscillator (LPRC)
100 = Secondary Oscillator (SOSC)
011 = Primary Oscillator with PLL module (XTPLL, HSPLL, ECPLL)
010 = Primary Oscillator (XT, HS, EC)
001 = Fast RC Oscillator with Postscaler and PLL module (FRCPLL)
000 = Fast RC Oscillator (FRC)
bit 7-6 FCKSM<1:0>: Clock Switching and Fail-Safe Clock Monitor Configuration bits
1x = Clock switching and Fail-Safe Clock Monitor are disabled
01 = Clock switching is enabled, Fail-Safe Clock Monitor is disabled
00 = Clock switching is enabled, Fail-Safe Clock Monitor is enabled
bit 5 OSCIOFCN: OSCO Pin Configuration bit
If POSCMD<1:0> = 11 or 00:
1 = OSCO/CLKO/RC15 functions as CLKO (FOSC/2)
0 = OSCO/CLKO/RC15 functions as port I/O (RC15)
If POSCMD<1:0> = 10 or 01:
OSCIOFCN has no effect on OSCO/CLKO/RC15.
bit 4 IOL1WAY: IOLOCK One-Way Set Enable bit
1 = The IOLOCK bit (OSCCON<6>) can be set once, provided the unlock sequence has been
completed. Once set, the Peripheral Pin Select registers cannot be written to a second time.
0 = The IOLOCK bit can be set and cleared as needed, provided the unlock sequence has been
completed
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bit 3-2 Reserved: Always maintain as ‘1’
bit 1-0 POSCMD<1:0>: Primary Oscillator Configuration bits
11 = Primary Oscillator mode is disabled
10 = HS Oscillator mode is selected
01 = XT Oscillator mode is selected
00 = EC Oscillator mode is selected
REGISTER 29-2: CW2: FLASH CONFIGURATION WORD 2 (CONTINUED)
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DS39996F-page 338 2010-2011 Microchip Technology Inc.
REGISTER 29-3: CW3: FLASH CONFIGURATION WORD 3
U-1 U-1 U-1 U-1 U-1 U-1 U-1 U-1
— — — — — — — —
bit 23 bit 16
R/PO-1 R/PO-1 R/PO-1 R/PO-1 R/PO-1 R/PO-1 r-1 R/PO-1
WPEND WPCFG WPDIS BOREN WDTWIN1 WDTWIN0 rSOSCSEL
bit 15 bit 8
R/PO-1 R/PO-1 R/PO-1 R/PO-1 R/PO-1 R/PO-1 R/PO-1 R/PO-1
VBTBOR WPFP6(3) WPFP5 WPFP4 WPFP3 WPFP2 WPFP1 WPFP0
bit 7 bit 0
Legend: PO = Program Once bit r = Reserved bit
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 23-16 Unimplemented: Read as ‘1’
bit 15 WPEND: Segment Write Protection End Page Select bit
1 = Protected code segment upper boundary is at the last page of program memory; the lower
boundary is the code page specified by WPFP<6:0>
0 = Protected code segment lower boundary is at the bottom of the program memory (000000h); upper
boundary is the code page specified by WPFP<6:0>
bit 14 WPCFG: Configuration Word Code Page Write Protection Select bit
1 = Last page (at the top of program memory) and Flash Configuration Words are not write-protected(1)
0 = Last page and Flash Configuration Words are write-protected provided WPDIS = ‘0’
bit 13 WPDIS: Segment Write Protection Disable bit
1 = Segmented code protection is disabled
0 = Segmented code protection is enabled; protected segment is defined by the WPEND, WPCFG and
WPFPx Configuration bits
bit 12 BOREN: Brown-out Reset Enable bit
1 = BOR is enabled (all modes except Deep Sleep)
0 = BOR is disabled
bit 11-10 WDTWIN<1:0>: Watchdog Timer Window Width Select bits
11 =25%
10 =37.5%
01 =50%
00 =75%
bit 9 Reserved: Always maintain as ‘1’
bit 8 SOSCSEL: SOSC Selection bit
1 = SOSC circuit is selected
0 = Digital (SCLKI) mode(2)
bit 7 VBTBOR: VBAT BOR Enable bit
1 =V
BAT BOR is enabled
0 =V
BAT BOR is disabled
Note 1: Regardless of WPCFG status, if WPEND = 1 or if WPFP corresponds to the Configuration Word page, the
Configuration Word page is protected.
2: Ensure that the SCLKI pin is made a digital input while using this configuration (see Table 11 - 1).
3: For the 62K devices: PIC24FJ64GA310, PIC24FJ64GA308 and PIC24FJ64GA306, bit 6 should be
maintained as ‘0’.
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bit 6-0 WPFP<6:0>: Write-Protected Code Segment Boundary Page bits(3)
Designates the 256 instruction words page boundary of the protected code segment.
If WPEND = 1:
Specifies the lower page boundary of the code-protected segment; the last page being the last
implemented page in the device.
If WPEND = 0:
Specifies the upper page boundary of the code-protected segment; Page 0 being the lower boundary.
REGISTER 29-3: CW3: FLASH CONFIGURATION WORD 3 (CONTINUED)
Note 1: Regardless of WPCFG status, if WPEND = 1 or if WPFP corresponds to the Configuration Word page, the
Configuration Word page is protected.
2: Ensure that the SCLKI pin is made a digital input while using this configuration (see Table 11 - 1).
3: For the 62K devices: PIC24FJ64GA310, PIC24FJ64GA308 and PIC24FJ64GA306, bit 6 should be
maintained as ‘0’.
PIC24FJ128GA310 FAMILY
DS39996F-page 340 2010-2011 Microchip Technology Inc.
REGISTER 29-4: CW4: FLASH CONFIGURATION WORD 4
U-1 U-1 U-1 U-1 U-1 U-1 U-1 U-1
— — — — — — — —
bit 23 bit 16
r-1 r-1 r-1 r-1 r-1 r-1 r-1 R/PO-1
r r r r r r r
DSSWEN
bit 15 bit 8
R/PO-1 R/PO-1 R/PO-1 R/PO-1 R/PO-1 R/PO-1 R/PO-1 R/PO-1
DSWDTEN
DSBOREN DSWDTOSC DSWDPS4 DSWDPS3 DSWDPS2 DSWDPS1 DSWDPS0
bit 7 bit 0
Legend: r = Reserved bit
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 23-16 Unimplemented: Read as ‘1’
bit 15-9 Reserved: Read as ‘1’
bit 8 DSSWEN: Deep Sleep Software Control Select bit
1 = Deep Sleep operation is enabled and controlled by the DSEN bit
0 = Deep Sleep operation is disabled
bit 7 DSWDTEN: Deep Sleep Watchdog Timer Enable bit
1 = Deep Sleep WDT is enabled
0 = Deep Sleep WDT is disabled
bit 6 DSBOREN: Deep Sleep Brown-out Reset Enable bit
1 = BOR is enabled in Deep Sleep mode
0 = BOR is disabled in Deep Sleep mode (remains active in other Sleep modes)
bit 5 DSWDTOSC: Deep Sleep Watchdog Timer Clock Select bit
1 = Clock source is LPRC
0 = Clock source is SOSC
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bit 4-0 DSWDPS<4:0>: Deep Sleep Watchdog Timer Postscaler Select bits
11111 = 1:68,719,476,736 (25.7 days)
11110 = 1:34,359,738,368(12.8 days)
11101 = 1:17,179,869,184 (6.4 days)
11100 = 1:8,589,934592 (77.0 hours)
11011 = 1:4,294,967,296 (38.5 hours)
11010 = 1:2,147,483,648 (19.2 hours)
11001 = 1:1,073,741,824 (9.6 hours)
11000 = 1:536,870,912 (4.8 hours)
10111 = 1:268,435,456 (2.4 hours)
10110 = 1:134,217,728 (72.2 minutes)
10101 = 1:67,108,864 (36.1 minutes)
10100 = 1:33,554,432 (18.0 minutes)
10011 = 1:16,777,216 (9.0 minutes)
10010 = 1:8,388,608 (4.5 minutes)
10001 = 1:4,194,304 (135.3 s)
10000 = 1:2,097,152 (67.7 s)
01111 = 1:1,048,576 (33.825 s)
01110 = 1:524,288 (16.912 s)
01101 = 1:262,114 (8.456 s)
01100 = 1:131,072 (4.228 s)
01011 = 1:65,536 (2.114 s)
01010 = 1:32,768 (1.057 s)
01001 = 1:16,384 (528.5 ms)
01000 = 1:8,192 (264.3 ms)
00111 = 1:4,096 (132.1 ms)
00110 = 1:2,048 (66.1 ms)
00101 = 1:1,024 (33 ms)
00100 = 1:512 (16.5 ms)
00011 = 1:256 (8.3 ms)
00010 = 1:128 (4.1 ms)
00001 = 1:64 (2.1 ms)
00000 = 1:32 (1 ms)
REGISTER 29-4: CW4: FLASH CONFIGURATION WORD 4 (CONTINUED)
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REGISTER 29-5: DEVID: DEVICE ID REGISTER
U-1 U-1 U-1 U-1 U-1 U-1 U-1 U-1
— — — — — — — —
bit 23 bit 16
RRRRRRRR
FAMID7 FAMID6 FAMID5 FAMID4 FAMID3 FAMID2 FAMID1 FAMID0
bit 15 bit 8
RRRRRRRR
DEV7 DEV6 DEV5 DEV4 DEV3 DEV2 DEV1 DEV0
bit 7 bit 0
Legend: R = Readable bit U = Unimplemented bit
bit 23-16 Unimplemented: Read as ‘1’
bit 15-8 FAMID<7:0>: Device Family Identifier bits
0100 0110 = PIC24FJ128GA310 family
bit 7-0 DEV<7:0>: Individual Device Identifier bits
1110 0000 = PIC24FJ64GA306
1110 0010 = PIC24FJ128GA306
1110 0100 = PIC24FJ64GA308
1110 0110 = PIC24FJ128GA308
1110 1000 = PIC24FJ64GA310
1110 1010 = PIC24FJ128GA310
REGISTER 29-6: DEVREV: DEVICE REVISION REGISTER
U-0 U-0 U-0 U-0 U-0 U-0 U-0 U-0
— — — — — — — —
bit 23 bit 16
U-0 U-0 U-0 U-0 U-0 U-0 U-0 U-0
— — — — — — — —
bit 15 bit 8
U-0 U-0 U-0 U-0 R R R R
— — — — REV3 REV2 REV1 REV0
bit 7 bit 0
Legend: R = Readable bit U = Unimplemented bit
bit 23-4 Unimplemented: Read as ‘0’
bit 3-0 REV<3:0>: Device revision identifier bits
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29.2 On-Chip Voltage Regulator
All PIC24FJ128GA310 family devices power their core
digital logic at a nominal 1.8V. This may create an issue
for designs that are required to operate at a higher
typical voltage, such as 3.3V. To simplify system
design, all devices in the PIC24FJ128GA310 family
incorporate an on-chip regulator that allows the device
to run its core logic from VDD.
This regulator is always enabled. It provides a constant
voltage (1.8V nominal) to the digital core logic, from a
VDD of about 2.1V all the way up to the device’s VDD-
MAX. It does not have the capability to boost VDD levels.
In order to prevent “brown-out” conditions when the
voltage drops too low for the regulator, the Brown-out
Reset occurs. Then the regulator output follows VDD
with a typical voltage drop of 300 mV.
A low-ESR capacitor (such as ceramic) must be
connected to the V
CAP
pin (Figure 29-1). This helps to
maintain the stability of the regulator. The recommended
value for the filter capacitor (C
EFC
) is provided in
Section 32.1 “DC Characterist ics”
.
FIGURE 29-1: CONNE CTIONS FOR THE
ON-CHIP REGULATOR
29.2.1 ON-CHIP REGULATOR AND POR
The voltage regulator takes approximately 10 s for it
to generate output. During this time, designated as
TVREG, code execution is disabled. TVREG is applied
every time the device resumes operation after any
power-down, including Sleep mode. TVREG is deter-
mined by the status of the VREGS bit (RCON<8>) and
the WDTWIN Configuration bits (CW3<11:10>). Refer
to Section 32.0 “Elec trica l Chara cteristic s” for more
information on TVREG.
29.2.2 VOLTAGE REGULATOR STANDBY
MODE
The on-chip regulator always consumes a small incre-
mental amount of current over IDD/IPD, including when
the device is in Sleep mode, even though the core
digital logic does not require power. To provide addi-
tional savings in applications where power resources
are critical, the regulator can be made to enter Standby
mode on its own whenever the device goes into Sleep
mode. This feature is controlled by the VREGS bit
(RCON<8>). Clearing the VREGS bit enables the
Standby mode. When waking up from Standby mode,
the regulator needs to wait for TVREG to expire before
wake-up.
29.2.3 LOW-VOLTAGE/RETENTION
REGULATOR
When power-saving modes, such as Sleep and Deep
Sleep are used, PIC24FJ128GA310 family devices
may use a separate low-power, low-voltage/retention
regulator to power critical circuits. This regulator, which
operates at 1.2V nominal, maintains power to data
RAM and the RTCC while all other core digital logic is
powered down. It operates only in Sleep, Deep Sleep
and VBAT modes.
The low-voltage/retention regulator is described in more
detail in
Section 10.1.3 “Low-Voltage/Retention
Regulator”
.
VDD
VCAP
VSS
PIC24FJXXXGA3XX
CEFC
3.3V(1)
Note 1: This is a typical operating voltage. Refer to
Section 32.0 “Electrical Characteristics”
for the full operating ranges of VDD.
(10 F typ)
Note: For more information, see Section 32.0
“Electrical Characteristics”. The infor-
mation in this data sheet supersedes the
information in the FRM.
PIC24FJ128GA310 FAMILY
DS39996F-page 344 2010-2011 Microchip Technology Inc.
29.3 Watchdog T imer (WDT)
For PIC24FJ128GA310 family devices, the WDT is
driven by the LPRC oscillator. When the WDT is
enabled, the clock source is also enabled.
The nominal WDT clock source from LPRC is 31 kHz.
This feeds a prescaler that can be configured for either
5-bit (divide-by-32) or 7-bit (divide-by-128) operation.
The prescaler is set by the FWPSA Configuration bit.
With a 31 kHz input, the prescaler yields a nominal
WDT Time-out period (TWDT) of 1 ms in 5-bit mode or
4 ms in 7-bit mode.
A variable postscaler divides down the WDT prescaler
output and allows for a wide range of time-out periods.
The postscaler is controlled by the WDTPS<3:0> Con-
figuration bits (CW1<3:0>), which allows the selection
of a total of 16 settings, from 1:1 to 1:32,768. Using the
prescaler and postscaler time-out periods, ranging
from 1 ms to 131 seconds, can be achieved.
The WDT, prescaler and postscaler are reset:
• On any device Reset
• On the completion of a clock switch, whether
invoked by software (i.e., setting the OSWEN bit
after changing the NOSC bits) or by hardware
(i.e., Fail-Safe Clock Monitor)
• When a PWRSAV instruction is executed
(i.e., Sleep or Idle mode is entered)
• When the device exits Sleep or Idle mode to
resume normal operation
•By a CLRWDT instruction during normal execution
If the WDT is enabled, it will continue to run during
Sleep or Idle modes. When the WDT time-out occurs,
the device will wake the device and code execution will
continue from where the PWRSAV instruction was
executed. The corresponding SLEEP or IDLE
(RCON<3:2>) bits will need to be cleared in software
after the device wakes up.
The WDT Flag bit, WDTO (RCON<4>), is not auto-
matically cleared following a WDT time-out. To detect
subsequent WDT events, the flag must be cleared in
software.
29.3.1 WINDOWED OPERATION
The Watchdog Timer has an optional Fixed Window
mode of operation. In this Windowed mode, CLRWDT
instructions can only reset the WDT during the last 1/4
of the programmed WDT period. A CLRWDT instruction
executed before that window causes a WDT Reset,
similar to a WDT time-out.
Windowed WDT mode is enabled by programming the
WINDIS Configuration bit (CW1<7>) to ‘0’.
29.3.2 CONTROL REGISTER
The WDT is enabled or disabled by the FWDTEN<1:0>
Configuration bits. When the Configuration bits,
FWDTEN<1:0> = 11, the WDT is always enabled.
The WDT can be optionally controlled in software when
the Configuration bits, FWDTEN<1:0> = 10. When
FWDTEN<1:0> = 00, the Watchdog Timer is always
disabled. The WDT is enabled in software by setting
the SWDTEN control bit (RCON<5>). The SWDTEN
control bit is cleared on any device Reset. The software
WDT option allows the user to enable the WDT for
critical code segments and disable the WDT during
non-critical segments for maximum power savings.
FIGURE 29-2: WD T BLOCK DIAGRAM
Note: The CLRWDT and PWRSAV instructions
clear the prescaler and postscaler counts
when executed.
LPRC Input WDT Overflow
Wake from Sleep
31 kHz
Prescaler Postscaler
FWPSA
SWDTEN
FWDTEN<1:0>
Reset
All Device Resets
Sleep or Idle Mode
LPRC Control
CLRWDT Instr.
PWRSAV Instr.
(5-bit/7-bit) 1:1 to 1:32.768
WDTPS<3:0>
1 ms/4 ms
Exit Sleep or
Idle Mode
WDT
Counter
Transition to
New Clock Source
2010-2011 Microchip Technology Inc. DS39996F-page 345
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29.4 Program Verification and
Code Protection
PIC24FJ128GA310 family devices provide two compli-
mentary methods to protect application code from
overwrites and erasures. These also help to protect the
device from inadvertent configuration changes during
run time.
29.4.1 GENERAL SEGMENT PROTECTION
For all devices in the PIC24FJ128GA310 family, the
on-chip program memory space is treated as a single
block, known as the General Segment (GS). Code pro-
tection for this block is controlled by one Configuration
bit, GCP. This bit inhibits external reads and writes to
the program memory space. It has no direct effect in
normal execution mode.
Write protection is controlled by the GWRP bit in the
Configuration Word. When GWRP is programmed to
‘0’, internal write and erase operations to program
memory are blocked.
29.4.2 CODE SEGMENT PROTECTION
In addition to global General Segment protection, a
separate subrange of the program memory space can
be individually protected against writes and erases.
This area can be used for many purposes where a sep-
arate block of write and erase-protected code is
needed, such as bootloader applications. Unlike
common boot block implementations, the specially
protected segment in the PIC24FJ128GA310 family
devices can be located by the user anywhere in the
program space and configured in a wide range of sizes.
Code segment protection provides an added level of
protection to a designated area of program memory by
disabling the NVM safety interlock whenever a write or
erase address falls within a specified range. It does not
override General Segment protection controlled by the
GCP or GWRP bits. For example, if GCP and GWRP
are enabled, enabling segmented code protection for
the bottom half of program memory does not undo
General Segment protection for the top half.
The size and type of protection for the segmented code
range are configured by the WPFPx, WPEND, WPCFG
and WPDIS bits in Configuration Word 3. Code seg-
ment protection is enabled by programming the WPDIS
bit (= 0). The WPFP bits specify the size of the segment
to be protected, by specifying the 512-word code page
that is the start or end of the protected segment. The
specified region is inclusive, therefore, this page will
also be protected.
The WPEND bit determines if the protected segment
uses the top or bottom of the program space as a
boundary. Programming WPEND (= 0) sets the bottom
of program memory (000000h) as the lower boundary
of the protected segment. Leaving WPEND unpro-
grammed (= 1) protects the specified page through the
last page of implemented program memory, including
the Configuration Word locations.
A separate bit, WPCFG, is used to protect the last page
of program space, including the Flash Configuration
Words. Programming WPCFG (= 0) protects the last
page in addition to the pages selected by the WPEND
and WPFP<6:0> bits setting. This is useful in circum-
stances where write protection is needed for both the
code segment in the bottom of the memory and the
Flash Configuration Words.
The various options for segment code protection are
shown in Tab l e 2 9 -2 .
TABLE 29-2: CODE SEGMEN T PROTECTION CONFIGURATION OPTIONS
Segment Configuration Bits Write/Erase Protection of Code Segment
WPDIS WPEND WPCFG
1xxNo additional protection is enabled; all program memory protection is configured
by GCP and GWRP.
01xAddresses from the first address of the code page are defined by WPFP<7:0>
through the end of implemented program memory (inclusive); write/erase
protected, including Flash Configuration Words.
001Address 000000h through the last address of the code page is defined by
WPFP<7:0> (inclusive); write/erase protected.
000Address 000000h through the last address of code page is defined by
WPFP<7:0> (inclusive); write/erase protected and the last page, including Flash
Configuration Words, are write/erase protected.
PIC24FJ128GA310 FAMILY
DS39996F-page 346 2010-2011 Microchip Technology Inc.
29.4.3 CONFIGURATION REGISTER
PROTECTION
The Configuration registers are protected against
inadvertent or unwanted changes or reads in two ways.
The primary protection method is the same as that of
the RP registers – shadow registers contain a compli-
mentary value which is constantly compared with the
actual value.
To safeguard against unpredictable events, Configura-
tion bit changes resulting from individual cell level
disruptions (such as ESD events) will cause a parity
error and trigger a device Reset.
The data for the Configuration registers is derived from
the Flash Configuration Words in program memory.
When the GCP bit is set, the source data for device
configuration is also protected as a consequence. Even
if General Segment protection is not enabled, the
device configuration can be protected by using the
appropriate code segment protection setting.
29.5 JTAG Interface
PIC24FJ128GA310 family devices implement a JTAG
interface, which supports boundary scan device
testing.
29.6 In-Circuit Serial Programming
PIC24FJ128GA310 family microcontrollers can be
serially programmed while in the end application circuit.
This is simply done with two lines for clock (PGECx)
and data (PGEDx), and three other lines for power
(VDD), ground (VSS) and MCLR. This allows customers
to manufacture boards with unprogrammed devices
and then program the microcontroller just before
shipping the product. This also allows the most recent
firmware or a custom firmware to be programmed.
29.7 In-Circuit Debugger
When MPLAB® ICD 3 is selected as a debugger, the
in-circuit debugging functionality is enabled. This func-
tion allows simple debugging functions when used with
MPLAB IDE. Debugging functionality is controlled
through the PGECx (Emulation/Debug Clock) and
PGEDx (Emulation/Debug Data) pins.
To use the in-circuit debugger function of the device,
the design must implement ICSP connections to
MCLR, VDD, VSS and the PGECx/PGEDx pin pair des-
ignated by the ICS Configuration bits. In addition, when
the feature is enabled, some of the resources are not
available for general use. These resources include the
first 80 bytes of data RAM and two I/O pins.
2010-2011 Microchip Technology Inc. DS39996F-page 347
PIC24FJ128GA310 FAMILY
30.0 DEVELOPMENT SUPPORT
The PIC® microcontrollers and dsPIC® digital signal
controllers are supported with a full range of software
and hardware development tools:
• Integrated Development Environment
- MPLAB® IDE Software
• Compilers/Assemblers/Linkers
- MPLAB C Compiler for Various Device
Families
- HI-TECH C® for Various Device Families
- MPASMTM Assembler
-MPLINK
TM Object Linker/
MPLIBTM Object Librarian
- MPLAB Assembler/Linker/Librarian for
Various Device Families
• Simulators
- MPLAB SIM Software Simulator
•Emulators
- MPLAB REAL ICE™ In-Circuit Emulator
• In-Circuit Debuggers
- MPLAB ICD 3
- PICkit™ 3 Debug Express
• Device Programmers
- PICkit™ 2 Programmer
- MPLAB PM3 Device Programmer
• Low-Cost Demonstration/Development Boards,
Evaluation Kits, and Starter Kits
30.1 MPLAB Integrated Development
Environment Software
The MPLAB IDE software brings an ease of software
development previously unseen in the 8/16/32-bit
microcontroller market. The MPLAB IDE is a Windows®
operating system-based application that contains:
• A single graphical interface to all debugging tools
- Simulator
- Programmer (sold separately)
- In-Circuit Emulator (sold separately)
- In-Circuit Debugger (sold separately)
• A full-featured editor with color-coded context
• A multiple project manager
• Customizable data windows with direct edit of
contents
• High-level source code debugging
• Mouse over variable inspection
• Drag and drop variables from source to watch
windows
• Extensive on-line help
• Integration of select third party tools, such as
IAR C Compilers
The MPLAB IDE allows you to:
• Edit your source files (either C or assembly)
• One-touch compile or assemble, and download to
emulator and simulator tools (automatically
updates all project information)
• Debug using:
- Source files (C or assembly)
- Mixed C and assembly
- Machine code
MPLAB IDE supports multiple debugging tools in a
single development paradigm, from the cost-effective
simulators, through low-cost in-circuit debuggers, to
full-featured emulators. This eliminates the learning
curve when upgrading to tools with increased flexibility
and power.
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DS39996F-page 348 2010-2011 Microchip Technology Inc.
30.2 MPLAB C Compilers for Various
Device Families
The MPLAB C Compiler code development systems
are complete ANSI C compilers for Microchip’s PIC18,
PIC24 and PIC32 families of microcontrollers and the
dsPIC30 and dsPIC33 families of digital signal control-
lers. These compilers provide powerful integration
capabilities, superior code optimization and ease of
use.
For easy source level debugging, the compilers provide
symbol information that is optimized to the MPLAB IDE
debugger.
30.3 HI-TECH C for Various Device
Families
The HI-TECH C Compiler code development systems
are complete ANSI C compilers for Microchip’s PIC
family of microcontrollers and the dsPIC family of digital
signal controllers. These compilers provide powerful
integration capabilities, omniscient code generation
and ease of use.
For easy source level debugging, the compilers provide
symbol information that is optimized to the MPLAB IDE
debugger.
The compilers include a macro assembler, linker, pre-
processor, and one-step driver, and can run on multiple
platforms.
30.4 MPASM Assembler
The MPASM Assembler is a full-featured, universal
macro assembler for PIC10/12/16/18 MCUs.
The MPASM Assembler generates relocatable object
files for the MPLINK Object Linker, Intel® standard HEX
files, MAP files to detail memory usage and symbol
reference, absolute LST files that contain source lines
and generated machine code and COFF files for
debugging.
The MPASM Assembler features include:
• Integration into MPLAB IDE projects
• User-defined macros to streamline
assembly code
• Conditional assembly for multi-purpose
source files
• Directives that allow complete control over the
assembly process
30.5 MPLINK Object Linker/
MPLIB Object Librarian
The MPLINK Object Linker combines relocatable
objects created by the MPASM Assembler and the
MPLAB C18 C Compiler. It can link relocatable objects
from precompiled libraries, using directives from a
linker script.
The MPLIB Object Librarian manages the creation and
modification of library files of precompiled code. When
a routine from a library is called from a source file, only
the modules that contain that routine will be linked in
with the application. This allows large libraries to be
used efficiently in many different applications.
The object linker/library features include:
• Efficient linking of single libraries instead of many
smaller files
• Enhanced code maintainability by grouping
related modules together
• Flexible creation of libraries with easy module
listing, replacement, deletion and extraction
30.6 MPLAB Assembler, Linker and
Librarian for Various Device
Families
MPLAB Assembler produces relocatable machine
code from symbolic assembly language for PIC24,
PIC32 and dsPIC devices. MPLAB C Compiler uses
the assembler to produce its object file. The assembler
generates relocatable object files that can then be
archived or linked with other relocatable object files and
archives to create an executable file. Notable features
of the assembler include:
• Support for the entire device instruction set
• Support for fixed-point and floating-point data
• Command line interface
• Rich directive set
• Flexible macro language
• MPLAB IDE compatibility
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30.7 MPLAB SIM Software Simulat or
The MPLAB SIM Software Simulator allows code
development in a PC-hosted environment by simulat-
ing the PIC MCUs and dsPIC® DSCs on an instruction
level. On any given instruction, the data areas can be
examined or modified and stimuli can be applied from
a comprehensive stimulus controller. Registers can be
logged to files for further run-time analysis. The trace
buffer and logic analyzer display extend the power of
the simulator to record and track program execution,
actions on I/O, most peripherals and internal registers.
The MPLAB SIM Software Simulator fully supports
symbolic debugging using the MPLAB C Compilers,
and the MPASM and MPLAB Assemblers. The soft-
ware simulator offers the flexibility to develop and
debug code outside of the hardware laboratory envi-
ronment, making it an excellent, economical software
development tool.
30.8 MPLAB REAL ICE In-Circuit
Emulator System
MPLAB REAL ICE In-Circuit Emulator System is
Microchip’s next generation high-speed emulator for
Microchip Flash DSC and MCU devices. It debugs and
programs PIC® Flash MCUs and dsPIC® Flash DSCs
with the easy-to-use, powerful graphical user interface of
the MPLAB Integrated Development Environment (IDE),
included with each kit.
The emulator is connected to the design engineer’s PC
using a high-speed USB 2.0 interface and is connected
to the target with either a connector compatible with in-
circuit debugger systems (RJ11) or with the new high-
speed, noise tolerant, Low-Voltage Differential Signal
(LVDS) interconnection (CAT5).
The emulator is field upgradable through future firmware
downloads in MPLAB IDE. In upcoming releases of
MPLAB IDE, new devices will be supported, and new
features will be added. MPLAB REAL ICE offers
significant advantages over competitive emulators
including low-cost, full-speed emulation, run-time
variable watches, trace analysis, complex breakpoints, a
ruggedized probe interface and long (up to three meters)
interconnection cables.
30.9 MPLAB ICD 3 In-Circuit Debugger
System
MPLAB ICD 3 In-Circuit Debugger System is Micro-
chip's most cost effective high-speed hardware
debugger/programmer for Microchip Flash Digital Sig-
nal Controller (DSC) and microcontroller (MCU)
devices. It debugs and programs PIC® Flash microcon-
trollers and dsPIC® DSCs with the powerful, yet easy-
to-use graphical user interface of MPLAB Integrated
Development Environment (IDE).
The MPLAB ICD 3 In-Circuit Debugger probe is con-
nected to the design engineer's PC using a high-speed
USB 2.0 interface and is connected to the target with a
connector compatible with the MPLAB ICD 2 or MPLAB
REAL ICE systems (RJ-11). MPLAB ICD 3 supports all
MPLAB ICD 2 headers.
30.10 PICkit 3 In-Circuit Debugger/
Programmer and
PICkit 3 Debug Express
The MPLAB PICkit 3 allows debugging and program-
ming of PIC® and dsPIC® Flash microcontrollers at a
most affordable price point using the powerful graphical
user interface of the MPLAB Integrated Development
Environment (IDE). The MPLAB PICkit 3 is connected
to the design engineer's PC using a full speed USB
interface and can be connected to the target via an
Microchip debug (RJ-11) connector (compatible with
MPLAB ICD 3 and MPLAB REAL ICE). The connector
uses two device I/O pins and the reset line to imple-
ment in-circuit debugging and In-Circuit Serial Pro-
gramming™.
The PICkit 3 Debug Express include the PICkit 3, demo
board and microcontroller, hookup cables and CDROM
with user’s guide, lessons, tutorial, compiler and
MPLAB IDE software.
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DS39996F-page 350 2010-2011 Microchip Technology Inc.
30.11 PICkit 2 Development
Programmer/Debugger and
PICkit 2 Debug Express
The PICkit™ 2 Development Programmer/Debugger is
a low-cost development tool with an easy to use inter-
face for programming and debugging Microchip’s Flash
families of microcontrollers. The full featured
Windows® programming interface supports baseline
(PIC10F, PIC12F5xx, PIC16F5xx), midrange
(PIC12F6xx, PIC16F), PIC18F, PIC24, dsPIC30,
dsPIC33, and PIC32 families of 8-bit, 16-bit, and 32-bit
microcontrollers, and many Microchip Serial EEPROM
products. With Microchip’s powerful MPLAB Integrated
Development Environment (IDE) the PICkit™ 2
enables in-circuit debugging on most PIC® microcon-
trollers. In-Circuit-Debugging runs, halts and single
steps the program while the PIC microcontroller is
embedded in the application. When halted at a break-
point, the file registers can be examined and modified.
The PICkit 2 Debug Express include the PICkit 2, demo
board and microcontroller, hookup cables and CDROM
with user’s guide, lessons, tutorial, compiler and
MPLAB IDE software.
30.12 MPLAB PM3 Device Programmer
The MPLAB PM3 Device Programmer is a universal,
CE compliant device programmer with programmable
voltage verification at VDDMIN and VDDMAX for
maximum reliability. It features a large LCD display
(128 x 64) for menus and error messages and a modu-
lar, detachable socket assembly to support various
package types. The ICSP™ cable assembly is included
as a standard item. In Stand-Alone mode, the MPLAB
PM3 Device Programmer can read, verify and program
PIC devices without a PC connection. It can also set
code protection in this mode. The MPLAB PM3
connects to the host PC via an RS-232 or USB cable.
The MPLAB PM3 has high-speed communications and
optimized algorithms for quick programming of large
memory devices and incorporates an MMC card for file
storage and data applications.
30.13 Demonstration/Development
Boards, Evaluation Kits, and
Starter Kits
A wide variety of demonstration, development and
evaluation boards for various PIC MCUs and dsPIC
DSCs allows quick application development on fully func-
tional systems. Most boards include prototyping areas for
adding custom circuitry and provide application firmware
and source code for examination and modification.
The boards support a variety of features, including LEDs,
temperature sensors, switches, speakers, RS-232
interfaces, LCD displays, potentiometers and additional
EEPROM memory.
The demonstration and development boards can be
used in teaching environments, for prototyping custom
circuits and for learning about various microcontroller
applications.
In addition to the PICDEM™ and dsPICDEM™ demon-
stration/development board series of circuits, Microchip
has a line of evaluation kits and demonstration software
for analog filter design, KEELOQ® security ICs, CAN,
IrDA®, PowerSmart battery management, SEEVAL®
evaluation system, Sigma-Delta ADC, flow rate
sensing, plus many more.
Also available are starter kits that contain everything
needed to experience the specified device. This usually
includes a single application and debug capability, all
on one board.
Check the Microchip web page (www.microchip.com)
for the complete list of demonstration, development
and evaluation kits.
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31.0 INSTRUCTION SET SUMMARY
The PIC24F instruction set adds many enhancements
to the previous PIC® MCU instruction sets, while main-
taining an easy migration from previous PIC MCU
instruction sets. Most instructions are a single program
memory word. Only three instructions require two
program memory locations.
Each single-word instruction is a 24-bit word divided
into an 8-bit opcode, which specifies the instruction
type and one or more operands, which further specify
the operation of the instruction. The instruction set is
highly orthogonal and is grouped into four basic
categories:
• Word or byte-oriented operations
• Bit-oriented operations
• Literal operations
• Control operations
Table 31-1 shows the general symbols used in
describing the instructions. The PIC24F instruction set
summary in Table 31-2 lists all the instructions, along
with the status flags affected by each instruction.
Most word or byte-oriented W register instructions
(including barrel shift instructions) have three
operands:
• The first source operand, which is typically a
register, ‘Wb’, without any address modifier
• The second source operand, which is typically a
register, ‘Ws’, with or without an address modifier
• The destination of the result, which is typically a
register, ‘Wd’, with or without an address modifier
However, word or byte-oriented file register instructions
have two operands:
• The file register specified by the value, ‘f’
• The destination, which could either be the file
register, ‘f’, or the W0 register, which is denoted
as ‘WREG’
Most bit-oriented instructions (including simple
rotate/shift instructions) have two operands:
• The W register (with or without an address
modifier) or file register (specified by the value of
‘Ws’ or ‘f’)
• The bit in the W register or file register
(specified by a literal value or indirectly by the
contents of register, ‘Wb’)
The literal instructions that involve data movement may
use some of the following operands:
• A literal value to be loaded into a W register or file
register (specified by the value of ‘k’)
• The W register or file register where the literal
value is to be loaded (specified by ‘Wb’ or ‘f’)
However, literal instructions that involve arithmetic or
logical operations use some of the following operands:
• The first source operand, which is a register, ‘Wb’,
without any address modifier
• The second source operand, which is a literal
value
• The destination of the result (only if not the same
as the first source operand), which is typically a
register, ‘Wd’, with or without an address modifier
The control instructions may use some of the following
operands:
• A program memory address
• The mode of the table read and table write
instructions
All instructions are a single word, except for certain
double-word instructions, which were made
double-word instructions so that all the required infor-
mation is available in these 48 bits. In the second word,
the 8 MSbs are ‘0’s. If this second word is executed as
an instruction (by itself), it will execute as a NOP.
Most single-word instructions are executed in a single
instruction cycle, unless a conditional test is true or the
program counter is changed as a result of the instruc-
tion. In these cases, the execution takes two instruction
cycles, with the additional instruction cycle(s) executed
as a NOP. Notable exceptions are the BRA (uncondi-
tional/computed branch), indirect CALL/GOTO, all table
reads and writes, and RETURN/RETFIE instructions,
which are single-word instructions but take two or three
cycles.
Certain instructions that involve skipping over the sub-
sequent instruction require either two or three cycles if
the skip is performed, depending on whether the
instruction being skipped is a single-word or two-word
instruction. Moreover, double-word moves require two
cycles. The double-word instructions execute in two
instruction cycles.
Note: This chapter is a brief summary of the
PIC24F instruction set architecture and is
not intended to be a comprehensive
reference source.
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TABLE 31-1: SYMBOLS USED IN OPCODE DESCRIPTIONS
Field Description
#text Means literal defined by “text”
(text) Means “content of text”
[text] Means “the location addressed by text”
{ } Optional field or operation
<n:m> Register bit field
.b Byte mode selection
.d Double-Word mode selection
.S Shadow register select
.w Word mode selection (default)
bit4 4-bit Bit Selection field (used in word addressed instructions) {0...15}
C, DC, N, OV, Z MCU Status bits: Carry, Digit Carry, Negative, Overflow, Sticky Zero
Expr Absolute address, label or expression (resolved by the linker)
f File register address {0000h...1FFFh}
lit1 1-bit unsigned literal {0,1}
lit4 4-bit unsigned literal {0...15}
lit5 5-bit unsigned literal {0...31}
lit8 8-bit unsigned literal {0...255}
lit10 10-bit unsigned literal {0...255} for Byte mode, {0:1023} for Word mode
lit14 14-bit unsigned literal {0...16383}
lit16 16-bit unsigned literal {0...65535}
lit23 23-bit unsigned literal {0...8388607}; LSB must be ‘0’
None Field does not require an entry, may be blank
PC Program Counter
Slit10 10-bit signed literal {-512...511}
Slit16 16-bit signed literal {-32768...32767}
Slit6 6-bit signed literal {-16...16}
Wb Base W register {W0..W15}
Wd Destination W register { Wd, [Wd], [Wd++], [Wd--], [++Wd], [--Wd] }
Wdo Destination W register
{ Wnd, [Wnd], [Wnd++], [Wnd--], [++Wnd], [--Wnd], [Wnd+Wb] }
Wm,Wn Dividend, Divisor working register pair (direct addressing)
Wn One of 16 working registers {W0..W15}
Wnd One of 16 destination working registers {W0..W15}
Wns One of 16 source working registers {W0..W15}
WREG W0 (working register used in file register instructions)
Ws Source W register { Ws, [Ws], [Ws++], [Ws--], [++Ws], [--Ws] }
Wso Source W register { Wns, [Wns], [Wns++], [Wns--], [++Wns], [--Wns], [Wns+Wb] }
2010-2011 Microchip Technology Inc. DS39996F-page 353
PIC24FJ128GA310 FAMILY
TABLE 31-2: INSTRUCTION SET OVERVIEW
Assembly
Mnemonic Assembly Syntax Description # of
Words # of
Cycles Status Flags
Affected
ADD ADD f f = f + WREG 1 1 C, DC, N, OV, Z
ADD f,WREG WREG = f + WREG 1 1 C, DC, N, OV, Z
ADD #lit10,Wn Wd = lit10 + Wd 1 1 C, DC, N, OV, Z
ADD Wb,Ws,Wd Wd = Wb + Ws 1 1 C, DC, N, OV, Z
ADD Wb,#lit5,Wd Wd = Wb + lit5 1 1 C, DC, N, OV, Z
ADDC ADDC f f = f + WREG + (C) 1 1 C, DC, N, OV, Z
ADDC f,WREG WREG = f + WREG + (C) 1 1 C, DC, N, OV, Z
ADDC #lit10,Wn Wd = lit10 + Wd + (C) 1 1 C, DC, N, OV, Z
ADDC Wb,Ws,Wd Wd = Wb + Ws + (C) 1 1 C, DC, N, OV, Z
ADDC Wb,#lit5,Wd Wd = Wb + lit5 + (C) 1 1 C, DC, N, OV, Z
AND AND f f = f .AND. WREG 1 1 N, Z
AND f,WREG WREG = f .AND. WREG 1 1 N, Z
AND #lit10,Wn Wd = lit10 .AND. Wd 1 1 N, Z
AND Wb,Ws,Wd Wd = Wb .AND. Ws 1 1 N, Z
AND Wb,#lit5,Wd Wd = Wb .AND. lit5 1 1 N, Z
ASR ASR f f = Arithmetic Right Shift f 1 1 C, N, OV, Z
ASR f,WREG WREG = Arithmetic Right Shift f 1 1 C, N, OV, Z
ASR Ws,Wd Wd = Arithmetic Right Shift Ws 1 1 C, N, OV, Z
ASR Wb,Wns,Wnd Wnd = Arithmetic Right Shift Wb by Wns 1 1 N, Z
ASR Wb,#lit5,Wnd Wnd = Arithmetic Right Shift Wb by lit5 1 1 N, Z
BCLR BCLR f,#bit4 Bit Clear f 1 1 None
BCLR Ws,#bit4 Bit Clear Ws 1 1 None
BRA BRA C,Expr Branch if Carry 1 1 (2) None
BRA GE,Expr Branch if Greater than or Equal 1 1 (2) None
BRA GEU,Expr Branch if Unsigned Greater than or Equal 1 1 (2) None
BRA GT,Expr Branch if Greater than 1 1 (2) None
BRA GTU,Expr Branch if Unsigned Greater than 1 1 (2) None
BRA LE,Expr Branch if Less than or Equal 1 1 (2) None
BRA LEU,Expr Branch if Unsigned Less than or Equal 1 1 (2) None
BRA LT,Expr Branch if Less than 1 1 (2) None
BRA LTU,Expr Branch if Unsigned Less than 1 1 (2) None
BRA N,Expr Branch if Negative 1 1 (2) None
BRA NC,Expr Branch if Not Carry 1 1 (2) None
BRA NN,Expr Branch if Not Negative 1 1 (2) None
BRA NOV,Expr Branch if Not Overflow 1 1 (2) None
BRA NZ,Expr Branch if Not Zero 1 1 (2) None
BRA OV,Expr Branch if Overflow 1 1 (2) None
BRA Expr Branch Unconditionally 1 2 None
BRA Z,Expr Branch if Zero 1 1 (2) None
BRA Wn Computed Branch 1 2 None
BSET BSET f,#bit4 Bit Set f 1 1 None
BSET Ws,#bit4 Bit Set Ws 1 1 None
BSW BSW.C Ws,Wb Write C bit to Ws<Wb> 1 1 None
BSW.Z Ws,Wb Write Z bit to Ws<Wb> 1 1 None
BTG BTG f,#bit4 Bit Toggle f 1 1 None
BTG Ws,#bit4 Bit Toggle Ws 1 1 None
BTSC BTSC f,#bit4 Bit Test f, Skip if Clear 1 1
(2 or 3)
None
BTSC Ws,#bit4 Bit Test Ws, Skip if Clear 1 1
(2 or 3)
None
PIC24FJ128GA310 FAMILY
DS39996F-page 354 2010-2011 Microchip Technology Inc.
BTSS BTSS f,#bit4 Bit Test f, Skip if Set 1 1
(2 or 3)
None
BTSS Ws,#bit4 Bit Test Ws, Skip if Set 1 1
(2 or 3)
None
BTST BTST f,#bit4 Bit Test f 1 1 Z
BTST.C Ws,#bit4 Bit Test Ws to C 1 1 C
BTST.Z Ws,#bit4 Bit Test Ws to Z 1 1 Z
BTST.C Ws,Wb Bit Test Ws<Wb> to C 1 1 C
BTST.Z Ws,Wb Bit Test Ws<Wb> to Z 1 1 Z
BTSTS BTSTS f,#bit4 Bit Test then Set f 1 1 Z
BTSTS.C Ws,#bit4 Bit Test Ws to C, then Set 1 1 C
BTSTS.Z Ws,#bit4 Bit Test Ws to Z, then Set 1 1 Z
CALL CALL lit23 Call Subroutine 2 2 None
CALL Wn Call Indirect Subroutine 1 2 None
CLR CLR f f = 0x0000 1 1 None
CLR WREG WREG = 0x0000 1 1 None
CLR Ws Ws = 0x0000 1 1 None
CLRWDT CLRWDT Clear Watchdog Timer 1 1 WDTO, Sleep
COM COM f f = f 11N, Z
COM f,WREG WREG = f 11N, Z
COM Ws,Wd Wd = Ws 11N, Z
CP CP f Compare f with WREG 1 1 C, DC, N, OV, Z
CP Wb,#lit5 Compare Wb with lit5 1 1 C, DC, N, OV, Z
CP Wb,Ws Compare Wb with Ws (Wb – Ws) 1 1 C, DC, N, OV, Z
CP0 CP0 f Compare f with 0x0000 1 1 C, DC, N, OV, Z
CP0 Ws Compare Ws with 0x0000 1 1 C, DC, N, OV, Z
CPB CPB f Compare f with WREG, with Borrow 1 1 C, DC, N, OV, Z
CPB Wb,#lit5 Compare Wb with lit5, with Borrow 1 1 C, DC, N, OV, Z
CPB Wb,Ws Compare Wb with Ws, with Borrow
(Wb – Ws – C)
1 1 C, DC, N, OV, Z
CPSEQ CPSEQ Wb,Wn Compare Wb with Wn, Skip if = 1 1
(2 or 3)
None
CPSGT CPSGT Wb,Wn Compare Wb with Wn, Skip if > 1 1
(2 or 3)
None
CPSLT CPSLT Wb,Wn Compare Wb with Wn, Skip if < 1 1
(2 or 3)
None
CPSNE CPSNE Wb,Wn Compare Wb with Wn, Skip if 11
(2 or 3)
None
DAW DAW.B Wn Wn = Decimal Adjust Wn 1 1 C
DEC DEC f f = f –1 1 1 C, DC, N, OV, Z
DEC f,WREG WREG = f –1 1 1 C, DC, N, OV, Z
DEC Ws,Wd Wd = Ws – 1 1 1 C, DC, N, OV, Z
DEC2 DEC2 f f = f – 2 1 1 C, DC, N, OV, Z
DEC2 f,WREG WREG = f – 2 1 1 C, DC, N, OV, Z
DEC2 Ws,Wd Wd = Ws – 2 1 1 C, DC, N, OV, Z
DISI DISI #lit14 Disable Interrupts for k Instruction Cycles 1 1 None
DIV DIV.SW Wm,Wn Signed 16/16-bit Integer Divide 1 18 N, Z, C, OV
DIV.SD Wm,Wn Signed 32/16-bit Integer Divide 1 18 N, Z, C, OV
DIV.UW Wm,Wn Unsigned 16/16-bit Integer Divide 1 18 N, Z, C, OV
DIV.UD Wm,Wn Unsigned 32/16-bit Integer Divide 1 18 N, Z, C, OV
EXCH EXCH Wns,Wnd Swap Wns with Wnd 1 1 None
FF1L FF1L Ws,Wnd Find First One from Left (MSb) Side 1 1 C
FF1R FF1R Ws,Wnd Find First One from Right (LSb) Side 1 1 C
TABLE 31-2: INSTRUCTION SET OVERVIEW (CONTINUED)
Assembly
Mnemonic Assembly Syntax Description # of
Words # of
Cycles Status Flags
Affected
2010-2011 Microchip Technology Inc. DS39996F-page 355
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GOTO GOTO Expr Go to Address 2 2 None
GOTO Wn Go to Indirect 1 2 None
INC INC f f = f + 1 1 1 C, DC, N, OV, Z
INC f,WREG WREG = f + 1 1 1 C, DC, N, OV, Z
INC Ws,Wd Wd = Ws + 1 1 1 C, DC, N, OV, Z
INC2 INC2 f f = f + 2 1 1 C, DC, N, OV, Z
INC2 f,WREG WREG = f + 2 1 1 C, DC, N, OV, Z
INC2 Ws,Wd Wd = Ws + 2 1 1 C, DC, N, OV, Z
IOR IOR f f = f .IOR. WREG 1 1 N, Z
IOR f,WREG WREG = f .IOR. WREG 1 1 N, Z
IOR #lit10,Wn Wd = lit10 .IOR. Wd 1 1 N, Z
IOR Wb,Ws,Wd Wd = Wb .IOR. Ws 1 1 N, Z
IOR Wb,#lit5,Wd Wd = Wb .IOR. lit5 1 1 N, Z
LNK LNK #lit14 Link Frame Pointer 1 1 None
LSR LSR f f = Logical Right Shift f 1 1 C, N, OV, Z
LSR f,WREG WREG = Logical Right Shift f 1 1 C, N, OV, Z
LSR Ws,Wd Wd = Logical Right Shift Ws 1 1 C, N, OV, Z
LSR Wb,Wns,Wnd Wnd = Logical Right Shift Wb by Wns 1 1 N, Z
LSR Wb,#lit5,Wnd Wnd = Logical Right Shift Wb by lit5 1 1 N, Z
MOV MOV f,Wn Move f to Wn 1 1 None
MOV [Wns+Slit10],Wnd Move [Wns+Slit10] to Wnd 1 1 None
MOV f Move f to f 1 1 N, Z
MOV f,WREG Move f to WREG 1 1 N, Z
MOV #lit16,Wn Move 16-bit Literal to Wn 1 1 None
MOV.b #lit8,Wn Move 8-bit Literal to Wn 1 1 None
MOV Wn,f Move Wn to f 1 1 None
MOV Wns,[Wns+Slit10] Move Wns to [Wns+Slit10] 1 1
MOV Wso,Wdo Move Ws to Wd 1 1 None
MOV WREG,f Move WREG to f 1 1 N, Z
MOV.D Wns,Wd Move Double from W(ns):W(ns+1) to Wd 1 2 None
MOV.D Ws,Wnd Move Double from Ws to W(nd+1):W(nd) 1 2 None
MUL MUL.SS Wb,Ws,Wnd {Wnd+1, Wnd} = Signed(Wb) * Signed(Ws) 1 1 None
MUL.SU Wb,Ws,Wnd {Wnd+1, Wnd} = Signed(Wb) * Unsigned(Ws) 1 1 None
MUL.US Wb,Ws,Wnd {Wnd+1, Wnd} = Unsigned(Wb) * Signed(Ws) 1 1 None
MUL.UU Wb,Ws,Wnd {Wnd+1, Wnd} = Unsigned(Wb) * Unsigned(Ws) 1 1 None
MUL.SU Wb,#lit5,Wnd {Wnd+1, Wnd} = Signed(Wb) * Unsigned(lit5) 1 1 None
MUL.UU Wb,#lit5,Wnd {Wnd+1, Wnd} = Unsigned(Wb) * Unsigned(lit5) 1 1 None
MUL f W3:W2 = f * WREG 1 1 None
NEG NEG f f = f + 1 1 1 C, DC, N, OV, Z
NEG f,WREG WREG = f + 1 1 1 C, DC, N, OV, Z
NEG Ws,Wd Wd = Ws + 1 1 1 C, DC, N, OV, Z
NOP NOP No Operation 1 1 None
NOPR No Operation 1 1 None
POP POP f Pop f from Top-of-Stack (TOS) 1 1 None
POP Wdo Pop from Top-of-Stack (TOS) to Wdo 1 1 None
POP.D Wnd Pop from Top-of-Stack (TOS) to W(nd):W(nd+1) 1 2 None
POP.S Pop Shadow Registers 1 1 All
PUSH PUSH f Push f to Top-of-Stack (TOS) 1 1 None
PUSH Wso Push Wso to Top-of-Stack (TOS) 1 1 None
PUSH.D Wns Push W(ns):W(ns+1) to Top-of-Stack (TOS) 1 2 None
PUSH.S Push Shadow Registers 1 1 None
TABLE 31-2: INSTRUCTION SET OVERVIEW (CONTINUED)
Assembly
Mnemonic Assembly Syntax Description # of
Words # of
Cycles Status Flags
Affected
PIC24FJ128GA310 FAMILY
DS39996F-page 356 2010-2011 Microchip Technology Inc.
PWRSAV PWRSAV #lit1 Go into Sleep or Idle mode 1 1 WDTO, Sleep
RCALL RCALL Expr Relative Call 1 2 None
RCALL Wn Computed Call 1 2 None
REPEAT REPEAT #lit14 Repeat Next Instruction lit14 + 1 times 1 1 None
REPEAT Wn Repeat Next Instruction (Wn) + 1 times 1 1 None
RESET RESET Software Device Reset 1 1 None
RETFIE RETFIE Return from Interrupt 1 3 (2) None
RETLW RETLW #lit10,Wn Return with Literal in Wn 1 3 (2) None
RETURN RETURN Return from Subroutine 1 3 (2) None
RLC RLC f f = Rotate Left through Carry f 1 1 C, N, Z
RLC f,WREG WREG = Rotate Left through Carry f 1 1 C, N, Z
RLC Ws,Wd Wd = Rotate Left through Carry Ws 1 1 C, N, Z
RLNC RLNC f f = Rotate Left (No Carry) f 1 1 N, Z
RLNC f,WREG WREG = Rotate Left (No Carry) f 1 1 N, Z
RLNC Ws,Wd Wd = Rotate Left (No Carry) Ws 1 1 N, Z
RRC RRC f f = Rotate Right through Carry f 1 1 C, N, Z
RRC f,WREG WREG = Rotate Right through Carry f 1 1 C, N, Z
RRC Ws,Wd Wd = Rotate Right through Carry Ws 1 1 C, N, Z
RRNC RRNC f f = Rotate Right (No Carry) f 1 1 N, Z
RRNC f,WREG WREG = Rotate Right (No Carry) f 1 1 N, Z
RRNC Ws,Wd Wd = Rotate Right (No Carry) Ws 1 1 N, Z
SE SE Ws,Wnd Wnd = Sign-Extended Ws 1 1 C, N, Z
SETM SETM f f = FFFFh 1 1 None
SETM WREG WREG = FFFFh 1 1 None
SETM Ws Ws = FFFFh 1 1 None
SL SL f f = Left Shift f 1 1 C, N, OV, Z
SL f,WREG WREG = Left Shift f 1 1 C, N, OV, Z
SL Ws,Wd Wd = Left Shift Ws 1 1 C, N, OV, Z
SL Wb,Wns,Wnd Wnd = Left Shift Wb by Wns 1 1 N, Z
SL Wb,#lit5,Wnd Wnd = Left Shift Wb by lit5 1 1 N, Z
SUB SUB f f = f – WREG 1 1 C, DC, N, OV, Z
SUB f,WREG WREG = f – WREG 1 1 C, DC, N, OV, Z
SUB #lit10,Wn Wn = Wn – lit10 1 1 C, DC, N, OV, Z
SUB Wb,Ws,Wd Wd = Wb – Ws 1 1 C, DC, N, OV, Z
SUB Wb,#lit5,Wd Wd = Wb – lit5 1 1 C, DC, N, OV, Z
SUBB SUBB f f = f – WREG – (C) 1 1 C, DC, N, OV, Z
SUBB f,WREG WREG = f – WREG – (C) 1 1 C, DC, N, OV, Z
SUBB #lit10,Wn Wn = Wn – lit10 – (C) 1 1 C, DC, N, OV, Z
SUBB Wb,Ws,Wd Wd = Wb – Ws – (C) 1 1 C, DC, N, OV, Z
SUBB Wb,#lit5,Wd Wd = Wb – lit5 – (C) 1 1 C, DC, N, OV, Z
SUBR SUBR f f = WREG – f 1 1 C, DC, N, OV, Z
SUBR f,WREG WREG = WREG – f 1 1 C, DC, N, OV, Z
SUBR Wb,Ws,Wd Wd = Ws – Wb 1 1 C, DC, N, OV, Z
SUBR Wb,#lit5,Wd Wd = lit5 – Wb 1 1 C, DC, N, OV, Z
SUBBR SUBBR f f = WREG – f – (C) 1 1 C, DC, N, OV, Z
SUBBR f,WREG WREG = WREG – f – (C) 1 1 C, DC, N, OV, Z
SUBBR Wb,Ws,Wd Wd = Ws – Wb – (C) 1 1 C, DC, N, OV, Z
SUBBR Wb,#lit5,Wd Wd = lit5 – Wb – (C) 1 1 C, DC, N, OV, Z
SWAP SWAP.b Wn Wn = Nibble Swap Wn 1 1 None
SWAP Wn Wn = Byte Swap Wn 1 1 None
TBLRDH TBLRDH Ws,Wd Read Prog<23:16> to Wd<7:0> 1 2 None
TABLE 31-2: INSTRUCTION SET OVERVIEW (CONTINUED)
Assembly
Mnemonic Assembly Syntax Description # of
Words # of
Cycles Status Flags
Affected
2010-2011 Microchip Technology Inc. DS39996F-page 357
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TBLRDL TBLRDL Ws,Wd Read Prog<15:0> to Wd 1 2 None
TBLWTH TBLWTH Ws,Wd Write Ws<7:0> to Prog<23:16> 1 2 None
TBLWTL TBLWTL Ws,Wd Write Ws to Prog<15:0> 1 2 None
ULNK ULNK Unlink Frame Pointer 1 1 None
XOR XOR f f = f .XOR. WREG 1 1 N, Z
XOR f,WREG WREG = f .XOR. WREG 1 1 N, Z
XOR #lit10,Wn Wd = lit10 .XOR. Wd 1 1 N, Z
XOR Wb,Ws,Wd Wd = Wb .XOR. Ws 1 1 N, Z
XOR Wb,#lit5,Wd Wd = Wb .XOR. lit5 1 1 N, Z
ZE ZE Ws,Wnd Wnd = Zero-Extend Ws 1 1 C, Z, N
TABLE 31-2: INSTRUCTION SET OVERVIEW (CONTINUED)
Assembly
Mnemonic Assembly Syntax Description # of
Words # of
Cycles Status Flags
Affected
PIC24FJ128GA310 FAMILY
DS39996F-page 358 2010-2011 Microchip Technology Inc.
NOTES:
2010-2011 Microchip Technology Inc. DS39996F-page 359
PIC24FJ128GA310 FAMILY
32.0 ELECTRICAL CHARACTERIS T ICS
This section provides an overview of the PIC24FJ128GA310 family electrical characteristics. Additional information will
be provided in future revisions of this document as it becomes available.
Absolute maximum ratings for the PIC24FJ128GA310 family are listed below. Exposure to these maximum rating
conditions for extended periods may affect device reliability. Functional operation of the device at these, or any other
conditions above the parameters indicated in the operation listings of this specification, is not implied.
Absolute Maximum Ratings(†)
Ambient temperature under bias.............................................................................................................-40°C to +100°C
Storage temperature .............................................................................................................................. -65°C to +150°C
Voltage on VDD with respect to VSS ......................................................................................................... -0.3V to +4.0V
Voltage on any combined analog and digital pin and MCLR, with respect to VSS ......................... -0.3V to (VDD + 0.3V)
Voltage on any digital only pin with respect to VSS when VDD < 3.0V............................................ -0.3V to (VDD + 0.3V)
Voltage on any digital only pin with respect to VSS when VDD > 3.0V..................................................... -0.3V to (+5.5V)
Maximum current out of VSS pin ...........................................................................................................................300 mA
Maximum current into VDD pin (Note 1)................................................................................................................250 mA
Maximum output current sunk by any I/O pin..........................................................................................................25 mA
Maximum output current sourced by any I/O pin ....................................................................................................25 mA
Maximum current sunk by all ports .......................................................................................................................200 mA
Maximum current sourced by all ports (Note 1)....................................................................................................200 mA
Note 1: Maximum allowable current is a function of device maximum power dissipation (see Tab l e 3 2-1 ).
†NOTICE: Stresses above those listed under “Absolute Maximum Ratings” may cause permanent damage to the
device. This is a stress rating only and functional operation of the device at those or any other conditions above those
indicated in the operation listings of this specification is not implied. Exposure to maximum rating conditions for
extended periods may affect device reliability.
PIC24FJ128GA310 FAMILY
DS39996F-page 360 2010-2011 Microchip Technology Inc.
32.1 DC Characteristi cs
FIGURE 32-1: PIC24F J1 28GA3 10 FAM IL Y VOLTAGE-FREQUENCY GRAPH (INDUSTRIAL)
TABLE 32-1: THERMAL OPERATING CONDITIONS
Rating Symbol Min Typ Max Unit
PIC24FJ128GA310 family:
Operating Junction Temperature Range TJ-40 — +125 °C
Operating Ambient Temperature Range TA-40 — +85 °C
Power Dissipation:
Internal Chip Power Dissipation: PINT = VDD x (IDD – IOH)PDPINT + PI/OW
I/O Pin Power Dissipation:
PI/O = ({VDD – VOH} x IOH) + (VOL x IOL)
Maximum Allowed Power Dissipation PDMAX (TJMAX – TA)/JA W
Frequency
Voltage (VDD)
2.0V
32 MHz
3.6V 3.6V
2.0V
2.2V
2.2V
Note: VCAP (nominal On-Chip Regulator output voltage) = 1.8V.
PIC24FJXXXDA1
TABLE 32-2: THERMAL PACKAGING CHARACTERISTICS
Characteristic Symbol Typ Max Unit Note
Package Thermal Resistance, 14x14x1 mm 100-pin TQFP JA 43.0 — °C/W (Note 1)
Package Thermal Resistance, 12x12x1 mm 100-pin TQFP JA 45.0 — °C/W (Note 1)
Package Thermal Resistance, 12x12x1 mm 80-pin TQFP JA 48.0 — °C/W (Note 1)
Package Thermal Resistance, 10x10x1 mm 64-pin TQFP JA 48.3 — °C/W (Note 1)
Package Thermal Resistance, 9x9x0.9 mm 64-pin QFN JA 28.0 — °C/W (Note 1)
Package Thermal Resistance, 10x10x1.1 mm 121-pin BGA JA 40.2 — °C/W (Note 1)
Note 1: Junction to ambient thermal resistance, Theta-JA (JA) numbers are achieved by package simulations.
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TABLE 32-3: DC CHARACTERISTICS: TEMPERATURE AND VOLTAGE S PECIFICATIONS
DC CHARACTERISTICS St andard Operating Conditions: 2V to 3.6V (unless otherwise stated)
Operating temperature -40°C TA +85°C for Industrial
Param
No. Symbol Characteristic Min Typ Max Units Conditions
Operating Voltage
DC10 VDD Supply Voltage 2 — 3.6 V With BOR disabled
DC12 VDR RAM Dat a Retention
Voltage(1)1.9 — — V
DC16 VPOR VDD Start Voltage
to Ensure Internal
Power-on Reset Signal
VSS ——V
DC17 SVDD VDD Rise Rate
to Ensure Internal
Power-on Reset Signal
0.05 — — V/ms 0-3.3V in 66 ms
0-2.5V in 50 ms
VBOR Brown-out Reset V olt age
on VDD Transition,
High-to-Low
2—2.2V
Note 1: This is the limit to which the RAM data can be retained while the on-chip regulator output voltage starts
following the VDD.
TABLE 32-4: DC CHARACTERISTICS: OPERATING CURRENT (IDD)
DC CHARACTERISTICS Standard Operating Conditions: 2V to 3.6V (unless otherwise stated)
Operating temperature -40°C TA +85°C for Industrial
Parameter
No. Typical(1)Max Units Operating
Temperature VDD Conditions
Operating Current (IDD)
DC19 0.15 — mA -40°C to +85°C 2.0V 0.5 MIPS,
FOSC = 1 MHz
DC20A 0.15 — mA -40°C to +85°C 3.3V
DC20 0.31 — mA -40°C to +85°C 2.0V 1 MIPS,
FOSC = 2 MHz
0.32 — mA -40°C to +85°C 3.3V
DC23 1.2 — mA -40°C to +85°C 2.0V 4 MIPS,
FOSC = 8 MHz
1.25 — mA -40°C to +85°C 3.3V
DC24 4.8 6.8 mA -40°C to +85°C 2.0V 16 MIPS,
FOSC = 32 MHz
4.9 6.9 mA -40°C to +85°C 3.3V
DC31 26 78 A -40°C to +85°C 2.0V LPRC (15.5 KIPS)
FOSC = 31 kHz
26 80 A -40°C to +85°C 3.3V
Note 1: Data in the “Typical” column is at 3.3V, 25°C unless otherwise stated. Typical parameters are for design
guidance only and are not tested.
PIC24FJ128GA310 FAMILY
DS39996F-page 362 2010-2011 Microchip Technology Inc.
TABLE 32-5: DC CHARACTERISTICS: IDLE CURRENT (IIDLE)
DC CHARACTERISTICS Standard Operating Conditions: 2V to 3.6V (unless otherwise stated)
Operating temperature -40°C TA +85°C for Industrial
Parameter
No. Typical(1)Max Units Operating
Temperature VDD Conditions
Idle Current (IIDLE)
DC40 81 — A -40°C to +85°C 2.0V 1 MIPS,
FOSC = 2 MHz
86 — A -40°C to +85°C 3.3V
DC43 0.27 — mA -40°C to +85°C 2.0V 4 MIPS,
FOSC = 8 MHz
0.28 — mA -40°C to +85°C 3.3V
DC47 1 1.35 mA -40°C to +85°C 2.0V 16 MIPS,
FOSC = 32 MHz
1.07 1.4 mA -40°C to +85°C 3.3V
DC50 0.47 — mA -40°C to +85°C 2.0V 4 MIPS (FRC),
FOSC = 8 MHz
0.48 — mA -40°C to +85°C 3.3V
DC51 21 76 A -40°C to +85°C 2.0V LPRC (15.5 KIPS),
FOSC = 31 kHz
21 78 A -40°C to +85°C 3.3V
Note 1: Data in the “Typical” column is at 3.3V, 25°C unless otherwise stated. Parameters are for design guidance
only and are not tested.
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TABLE 32-6: DC CHARACTERISTICS: POWER-DOWN CURRENT (IPD)
DC CHARACTERISTICS Sta nd ar d Oper a tin g C o ndi tio n s: 2V to 3.6V (unl es s other wise s tated)
Operating temperature -40°C T
A +85°C for Industrial
Parameter
No. Typical(1)Max Units Ope rating
Temperature VDD Conditions
Power-Down Current (IPD)
DC60 — — A-40°C
2.0V
3.7 — A+25°C
6.2 — A+60°C
13.6 27.5 A+85°C
——A-40°
3.3V Sleep(2)
3.8 — A+25°C
6.3 — A+60°C
13.7 28 A+85°C
DC61 — — A-40°
2.0V
Low-Voltage Sleep(3)
0.33 — A+25°C
2—A+60°C
7.7 14.5 A+85°C
——A-40°
3.3V
0.34 — A+25°C
2—A+60°C
7.9 15 A+85°C
DC70 — — A-40°
2.0V
Deep Sleep
0.01 — A+25°C
——A+60°C
—1.1A+85°C
——A-40°3.3V
0.04 — A+25°C
——A+60°C
—1.4A+85°C
0.4 2.0 A -40°C to +85°C 0V RTCC with VBAT mode (LPRC/SOSC)(4)
Note 1: Data in the Typical column is at 3.3V, 25°C unless otherwise stated. Parameters are for design guidance
only and are not tested.
2: The retention low-voltage regulator is disabled; RETEN (RCON<12>) = 0, LPCFG (CW1<10>) = 1.
3: The retention low-voltage regulator is enabled; RETEN (RCON<12>) = 1, LPCFG (CW1<10>) = 0.
4: The VBAT pin is connected to the battery and RTCC is running with VDD = 0.
PIC24FJ128GA310 FAMILY
DS39996F-page 364 2010-2011 Microchip Technology Inc.
TABLE 32-7: DC CHARACTERISTICS: CURRENT (BOR, WDT, DSBOR, DSWDT, LCD)
DC CHARACTERISTICS St a nd ar d Oper a tin g C o ndi tions: 2V to 3. 6V (unless o the r wise st a t ed )
Operating temperature -40°C T
A +85°C for Industrial
Parameter
No. Typical(1)Max Units Operating
Temperature VDD Conditions
Incremental Current Brown-out Reset (BOR)(2)
DC20 3.1 5 A -40°C to +85°C 2.0V BOR(2)
4.3 6 A -40°C to +85°C 3.3V
Incremental Current Brown-out Reset (WDT)(2)
DC71 0.8 1.5 A -40°C to +85°C 2.0V WDT(2)
0.8 1.5 A -40°C to +85°C 3.3V
Incremental Current HLVD (HLVD)(2)
DC75 5.7 15 A -40°C to +85°C 2.0V HLVD(2)
5.7 15 A -40°C to +85°C 3.3V
Incremental Current Real-Time Clock and Calendar (RTCC)(2)
DC77 0.4 1 A -40°C to +85°C 2.0V RTCC(2)
RTCC with SOSC
0.4 1 A -40°C to +85°C 3.3V
Incremental Current Real-Time Clock and Calendar (RTCC)(2)
DC77a 0.4 1 A -40°C to +85°C 2.0V RTCC(2)
RTCC with LPRC
0.4 1 A -40°C to +85°C 3.3V
Incremental Current Deep Sleep BOR ( DSBOR)(2)
DC81 0.07 0.3 A -40°C to +85°C 2.0V Deep Sleep BOR(2)
0.07 0.3 A -40°C to +85°C 3.3V
Incremental Current Deep Sleep Watchdog Timer Reset ( DSWDT)(2)
DC80 0.27 0.4 A -40°C to +85°C 2.0V Deep Sleep WDT(2)
0.27 0.4 A -40°C to +85°C 3.3V
Incremental Current LCD ( LCD)(2)
0.8 3 A -40°C to +85°C 3.3V LCD External/Internal(2,3)
1/8 MUX 1/3 Bias
DC90 20 30 A -40°C to +85°C 2.0V LCD Charge Pump(2,4)
1/8 MUX 1/3 Bias
24 40 A -40°C to +85°C 3.3V
VBAT A/D Monitor(5)
DC91 1.5 — A -40°C to +85°C 3.3V VBAT = 2V
4—A -40°C to +85°C 3.3V VBAT = 3.3V
Note 1: Data in the Typical column is at 3.3V, 25°C unless otherwise stated. Parameters are for design guidance
only and are not tested.
2: Incremental current while the module is enabled and running.
3: LCD is enabled and running; no glass is connected; the resistor ladder current is not included.
4: LCD is enabled and running; no glass is connected.
5: The A/D channel is connected to the VBAT pin internally, this is the current during A/D VBAT operation.
2010-2011 Microchip Technology Inc. DS39996F-page 365
PIC24FJ128GA310 FAMILY
TABLE 32-8: DC CHARACTERISTICS: I/O PIN INPUT SPECIFICATIONS
DC CHARACTERISTICS S tandard Operating Conditions: 2V to 3.6V (unless otherwise stated)
Operating temperature -40°C TA +85°C for Industrial
Param
No. Symbol Characteristic Min Typ(1)Max Units Conditions
VIL Input Low Voltage(3)
DI10 I/O Pins with ST Buffer VSS —0.2 VDD V
DI11 I/O Pins with TTL Buffer VSS —0.15 VDD V
DI15 MCLR VSS —0.2 VDD V
DI16 OSCI (XT mode) VSS —0.2 VDD V
DI17 OSCI (HS mode) VSS —0.2 VDD V
DI18 I/O Pins with I2C™ Buffer VSS —0.3 VDD V
DI19 I/O Pins with SMBus Buffer VSS — 0.8 V SMBus enabled
VIH Input High Voltage(3)
DI20 I/O Pins with ST Buffer:
with Analog Functions,
Digital Only
0.8 VDD
0.8 VDD
—
—
VDD
5.5
V
V
DI21 I/O Pins with TTL Buffer:
with Analog Functions,
Digital Only
0.25 VDD + 0.8
0.25 VDD + 0.8
—
—
VDD
5.5
V
V
DI25 MCLR 0.8 VDD —VDD V
DI26 OSCI (XT mode) 0.7 VDD —VDD V
DI27 OSCI (HS mode) 0.7 VDD —VDD V
DI28 I/O Pins with I2C™ Buffer:
with Analog Functions,
Digital Only
0.7 VDD
0.7 VDD
—
—
VDD
5.5
V
V
DI29 I/O Pins with SMBus Buffer:
with Analog Functions,
Digital Only
2.1
2.1
VDD
5.5
V
V
2.5V VPIN VDD
DI30 ICNPU CNxx Pull-up Current 150 250 550 AVDD = 3.3V, VPIN = VSS
DI30A ICNPD CNxx Pull-down Current 150 250 550 AVDD = 3.3V, VPIN = VDD
IIL Input Leakag e Curren t(2)
DI50 I/O Ports — — +1AVSS VPIN VDD,
pin at high-impedance
——+
1AVSS VPIN 5.5,
pin at high-impedance
DI51 Analog Input Pins — — +1AVSS VPIN VDD,
pin at high-impedance
DI55 MCLR ——+1AVSS VPIN VDD
DI56 OSCI/CLKI — — +1AVSS VPIN VDD,
EC, XT and HS modes
Note 1: Data in the “Typ” column is at 3.3V, 25°C unless otherwise stated. Parameters are for design guidance only
and are not tested.
2: Negative current is defined as current sourced by the pin.
3: Refer to Table 1-4 for I/O pins buffer types.
PIC24FJ128GA310 FAMILY
DS39996F-page 366 2010-2011 Microchip Technology Inc.
TABLE 32-9: DC CHARACTERISTICS: I/O PIN OUTPUT SPECIFICATIONS
DC CHARACTERISTICS St andard Operating Conditions: 2V to 3.6V (unless otherwise stated)
Operating temperature -40°C T
A +85°C for Industrial
Param
No. Symbol Characteristic Min Typ(1)Max Units Conditions
VOL Output Low Voltage
DO10 I/O Ports — — 0.4 V IOL = 6.6 mA, VDD = 3.6V
——0.4VI
OL = 5.0 mA, VDD = 2V
DO16 OSCO/CLKO — — 0.4 V IOL = 6.6 mA, VDD = 3.6V
——0.4VIOL = 5.0 mA, VDD = 2V
VOH Output High Voltage
DO20 I/O Ports 3.0 — — V IOH = -3.0 mA, VDD = 3.6V
2.4 — — V IOH = -6.0 mA, VDD = 3.6V
1.65 — — V IOH = -1.0 mA, VDD = 2V
1.4 — — V IOH = -3.0 mA, VDD = 2V
DO26 OSCO/CLKO 2.4 — — V IOH = -6.0 mA, VDD = 3.6V
1.4 — — V IOH = -1.0 mA, VDD = 2V
Note 1: Data in the “Typ” column is at 3.3V, 25°C unless otherwise stated. Parameters are for design guidance only
and are not tested.
TABLE 32-10: DC CHARACTERISTICS: PROGRAM MEMORY
DC CHARACTERISTICS St andard Operating Conditions: 2V to 3.6V (unless otherwise stated)
Operating temperature -40°C TA +85°C for Industrial
Param
No. Symbol Characteristic Min Typ(1)Max Units Conditions
Program Flash Memory
D130 EPCell Endurance 10000 — — E/W -40C to +85C
D131 VPR VDD for Read VMIN —3.6 VVMIN = Minimum operating voltage
D132B VDD for Self-Timed Write VMIN —3.6 VVMIN = Minimum operating voltage
D133A TIW Self-Timed Word Write
Cycle Time
—20—s
Self-Timed Row Write
Cycle Time
—1.5—ms
D133B TIE Self-Timed Page Erase
Time
20 — 40 ms
D134 TRETD Characteristic Retention 20 — — Year If no other specifications are violated
D135 IDDP Supply Current during
Programming
—16—mA
Note 1: Data in the “Typ” column is at 3.3V, 25°C unless otherwise stated.
2010-2011 Microchip Technology Inc. DS39996F-page 367
PIC24FJ128GA310 FAMILY
TABLE 32-11: INTERNAL VOLTAGE REGULATOR SPECIFICATIONS
Operating Condit ions : -40°C < TA < +85°C (unless otherwise stated)
Param
No. Symbol Characteristics Min Typ Max Units Comments
VRGOUT Regulator Output Voltage — 1.8 — V
VBG Internal Band Gap Reference 1.14 1.2 1.26 V
CEFC External Filter Capacitor Value 4.7 10 — F Series resistance < 3 Ohm
recommended; < 5 Ohm
required.
TVREG —10—sVREGS = 1 with any POR or BOR
TBG Band Gap Reference Start-up
Time
—1—ms
VLVR Low-Voltage Regulator Output
Voltage
— 1.2 — V RETEN = 1, LPCFG = 0
TABLE 32-12: VBAT OPERATING VOLTAGE SPECIFICATIONS
Param
No. Symbol Characteristic Min Typ Max Units Comments
VBT Operating Voltage 1.8 — 3.6 V Battery connected to the VBAT pin
VBTADC VBAT A/D Monitoring
Voltage Specification(1)1.6 — 3.6 V A/D monitoring the VBAT pin using
the internal A/D channel
Note 1: Measuring the A/D value, using the A/D, is represented by the equation:
Measured Voltage = ((VBAT/2)/VDD) * 1024) for 10-bit A/D and
Measured Voltage = ((VBAT/2)VDD) * 4096) for 12-bit A/D.
TABLE 32-13: CTMU CURRENT SOURCE SPECIFICATIONS
DC CHARACTERISTICS St andard Operating Conditions: 2V to 3.6V (unless otherwise stated)
Operating temperature -40°C T
A +85°C for Industrial
Param
No. Sym Characteristic Min Typ(1)Max Units Comments Conditions
IOUT1 CTMU Current
Source, Base Range
— 550 — nA CTMUICON<1:0> = 00
2.5V < VDD < VDDMAX
IOUT2 CTMU Current
Source, 10x Range
—5.5— A CTMUICON<1:0> = 01
IOUT3 CTMU Current
Source, 100x Range
—55—A CTMUICON<1:0> = 10
IOUT4 CTMU Current
Source, 1000x Range
— 550 — A CTMUICON<1:0> = 11(2)
VVoltage Change per
Degree Celsius
—3—mV/°C
Note 1: Nominal value at center point of current trim range (CTMUICON<7:2> = 000000).
2: Do not use this current range with temperature sensing diode.
PIC24FJ128GA310 FAMILY
DS39996F-page 368 2010-2011 Microchip Technology Inc.
TABLE 32-14: HIGH/LOW-VOLTAGE DETECT CHARACTERISTICS
TABLE 32-15: COMPARATOR DC SPECIFICATIONS
TABLE 32-16: COMPARATOR VOLTAGE REFERENCE DC SPECIFICATIONS
Operating Conditions: -40°C < TA < +85°C (unless otherwise stated)
Param
No. Symbol Characteristic Min Typ Max Units Conditions
DC18 VHLVD HLVD Voltage on VDD
Transition
HLVDL<3:0> = 0100(1)3.45 — 3.75 V
HLVDL<3:0> = 0101 3.30 — 3.6 V
HLVDL<3:0> = 0110 3.00 — 3.3 V
HLVDL<3:0> = 0111 2.80 — 3.1 V
HLVDL<3:0> = 1000 2.70 — 2.95 V
HLVDL<3:0> = 1001 2.50 — 2.75 V
HLVDL<3:0> = 1010 2.40 — 2.60 V
HLVDL<3:0> = 1011 2.30 — 2.5 V
HLVDL<3:0> = 1100 2.20 — 2.4 V
HLVDL<3:0> = 1101 2.10 — 2.3 V
HLVDL<3:0> = 1110 2.00 — 2.2 V
Note 1: Trip points for values of HLVD<3:0>, from ‘0000’ to ‘0011’, are not implemented.
Operating Condit ions : 2.0V < VDD < 3.6V, -40°C < TA < +85°C (unless otherwise stated)
Param
No. Symbol Characteristic Min Typ Max Units Comments
D300 VIOFF Input Offset Voltage*—20 40mV
D301 VICM Input Common-Mode Voltage*0—VDD V
D302 CMRR Common-Mode Rejection
Ratio*
55 — — dB
* Parameters are characterized but not tested.
Operating Condit ions : 2.0V < VDD < 3.6V, -40°C < TA < +85°C (unless otherwise stated)
Param
No. Symbol Characteristic Min Typ Max Units Comments
VRD310 CVRES Resolution VDD/24 — VDD/32 LSb
VRD311 CVRAA Absolute Accuracy — — AVDD – 1.5 LSb
VRD312 CVRUR Unit Resistor Value (R) — 2K —
2010-2011 Microchip Technology Inc. DS39996F-page 369
PIC24FJ128GA310 FAMILY
32.2 AC Characteristics and Timing Parameters
The information contained in this section defines the PIC24FJ128GA310 family AC characteristics and timing parameters.
TABLE 32-17: TEMPERATURE AND VOLTAGE SPECIFICATIONS – AC
FIGURE 32-2: LOAD CONDITIONS FOR DEVICE TIMING SPECIFICATIONS
TABLE 32-18: CAPACITIVE LOADING REQUIREMENTS ON OUTPUT PINS
AC CHARACTERISTICS
Standard Operating Conditions: 2V to 3.6V (unless otherwise st ated)
Operating temperature -40°C TA +85°C for Industrial
Operating voltage VDD range as described in Sect ion 32. 1 “DC Ch aracterist ics”.
Param
No. Symbol Characteristic Min Typ(1)Max Units Conditions
DO50 COSCO OSCO/CLKO Pin — — 15 pF In XT and HS modes when
external clock is used to drive
OSCI
DO56 CIO All I/O Pins and OSCO — — 50 pF EC mode
DO58 CBSCLx, SDAx — — 400 pF In I2C™ mode
Note 1: Data in the “Typ” column is at 3.3V, 25°C unless otherwise stated. Parameters are for design guidance
only and are not tested.
VDD/2
CL
RL
Pin
Pin
VSS
VSS
CL
RL= 464
CL= 50 pF for all pins except OSCO
15 pF for OSCO output
Load Condition 1 – for all pins except OSCO Load Condition 2 – for OSCO
PIC24FJ128GA310 FAMILY
DS39996F-page 370 2010-2011 Microchip Technology Inc.
FIGURE 32-3: EX TERN AL CLOCK TIMING
OSCI
CLKO
Q4 Q1 Q2 Q3 Q4 Q1
OS20
OS25
OS30 OS30
OS40 OS41
OS31
OS31
Q1 Q2 Q3 Q4 Q2 Q3
TABLE 32-19: EXTERNAL CLOCK TIMING REQUIREMENTS
AC CHARACTERISTICS St andard Operating Conditions: 2V to 3.6V (unless otherwise stated)
Operating temperature -40°C T
A +85°C for Industrial
Param
No. Symbol Characteristic Min Typ(1)Max Units Conditions
OS10 FOSC External CLKI Frequency
(External clocks allowed
only in EC mode)
DC
4
—
—
32
8
MHz
MHz
EC
ECPLL
Oscillator Frequency 3.5
4
10
10
31
—
—
—
—
—
10
8
32
8
33
MHz
MHz
MHz
MHz
kHz
XT
XTPLL
HS
HSPLL
SOSC
OS20 T
OSC TOSC = 1/FOSC — — — — See Parameter OS10 for
FOSC value
OS25 TCY Instruction Cycle Time(2)62.5 — DC ns
OS30 TosL,
TosH
External Clock in (OSCI)
High or Low Time
0.45 x TOSC ——nsEC
OS31 TosR,
TosF
External Clock in (OSCI)
Rise or Fall Time
— — 20 ns EC
OS40 TckR CLKO Rise Time(3) — 6 10 ns
OS41 TckF CLKO Fall Time(3)— 6 10 ns
Note 1: Data in the “Typ” column is at 3.3V, 25°C unless otherwise stated. Parameters are for design guidance only
and are not tested.
2: Instruction cycle period (T
CY) equals two times the input oscillator time base period. All specified values are
based on characterization data for that particular oscillator type, under standard operating conditions, with
the device executing code. Exceeding these specified limits may result in an unstable oscillator operation
and/or higher than expected current consumption. All devices are tested to operate at “Min.” values with an
external clock applied to the OSCI/CLKI pin. When an external clock input is used, the “Max.” cycle time
limit is “DC” (no clock) for all devices.
3: Measurements are taken in EC mode. The CLKO signal is measured on the OSCO pin. CLKO is low for the
Q1-Q2 period (1/2 T
CY) and high for the Q3-Q4 period (1/2 TCY).
2010-2011 Microchip Technology Inc. DS39996F-page 371
PIC24FJ128GA310 FAMILY
TABLE 32-20: PLL CLOCK TIMING SPECIFICATIONS (VDD = 2.2V TO 3.6V)
AC CHARACTERISTICS St andard Operating Conditions: 2V to 3.6V (unless otherwise stated)
Operating temperature -40°C TA +85°C for Industrial
Param
No. Symbol Characteristic(1)Min Typ(2)Max Units Conditions
OS50 FPLLI PLL Input Frequency
Range(2)4 — 8 MHz ECPLL mode
4—8MHzHSPLL mode
4—8 MHz XTPLL mode
OS52 TLOCK PLL Start-up Time
(Lock Time)
——128s
OS53 DCLK CLKO Stability (Jitter) -0.25 — 0.25 %
Note 1: These parameters are characterized but not tested in manufacturing.
2: Data in the “Typ” column is at 3.3V, 25°C unless otherwise stated. Parameters are for design guidance
only and are not tested.
TABLE 32-21: INTERNAL RC ACCURACY
AC CHARACTERISTICS Standard Operating Conditions: 2V to 3.6V (unless otherwise stated)
Operating temperature -40°C T
A +85°C for Industrial
Param
No. Characteristic Min Typ Max Units Conditions
F20 FRC Accuracy @
8MHz
(1,2)-1 — 1 % -10°C TA +85°C 2V VDD 3.6V
-1.5 — 1.5 % -40°C TA -10°C 2V VDD 3.6V
F21 LPRC @ 31 kHz -20 — 20 % -40°C TA +85°C VCAP (on-chip regulator
output voltage) = 1.8V
Note 1: Frequency is calibrated at 25°C and 3.3V. OSCTUN bits can be used to compensate for temperature drift.
2: To achieve this accuracy, physical stress applied to the microcontroller package (ex., by flexing the PCB)
must be kept to a minimum.
TABLE 32-22: RC OSCILLATOR START-UP TIME
AC CHARACTERISTICS St andard Operating Conditions: 2V to 3.6V (unless otherwise stated)
Operating temperature -40°C T
A +85°C for Industrial
Param
No. Characteristic Min Typ Max Units Conditions
TFRC —15—s
TLPRC —50—s
PIC24FJ128GA310 FAMILY
DS39996F-page 372 2010-2011 Microchip Technology Inc.
FIGURE 32-4: CLKO AND I/O TIMING CHARACTERISTICS
Note: Refer to Figure 32-2 for load conditions.
I/O Pin
(Input)
I/O Pin
(Output)
DI35
Old Value New Value
DI40
DO31
DO32
TABLE 32-23: CLKO AND I/O T IMING REQUIREMENTS
AC CHARACTERISTICS Standard Operating Conditions: 2V to 3.6V (unless otherwise stated)
Operating temperature -40°C T
A +85°C for Industrial
Param
No. Symbol Characteristic Min Typ(1)Max Units Conditions
DO31 TIOR Port Output Rise Time — 10 25 ns
DO32 TIOF Port Output Fall Time — 10 25 ns
DI35 TINP INTx Pin High or Low
Time (input)
20 — — ns
DI40 TRBP CNx High or Low Time
(input)
2——TCY
Note 1: Data in the “Typ” column is at 3.3V, 25°C unless otherwise stated.
2010-2011 Microchip Technology Inc. DS39996F-page 373
PIC24FJ128GA310 FAMILY
TABLE 32-24: RESET AND BROWN-OUT RESET REQUIREMENTS
AC CHARACTERISTICS Standard Operating Conditions: 2V to 3.6V (unless otherwise stated)
Operating temperature -40°C T
A +85°C for Industrial
Param
No. Symbol Characteristic Min Typ Max Units Conditions
SY10 TMCL MCLR Pulse width (Low) 2 — — s
SY12 TPOR Power-on Reset Delay — 2 — s
SY13 TIOZ I/O High-Impedance from
MCLR Low or Watchdog
Timer Reset
— — 100 ns
SY25 TBOR Brown-out Reset Pulse
Width
1——sVDD VBOR
TRST Internal State Reset Time — 50 — s
SY71 TPM Program Memory Wake-up
Time
—20—s Sleep wake-up with
VREGS = 0
—1—s Sleep wake-up with
VREGS = 1
SY72 TLVR Low-Voltage Regulator
Wake-up Time
—90—s Sleep wake-up with
VREGS = 0
—70—s Sleep wake-up with
VREGS = 1
TDSWU Deep Sleep Wake-up Time — 200 — sVCAP fully discharged before
wake-up
PIC24FJ128GA310 FAMILY
DS39996F-page 374 2010-2011 Microchip Technology Inc.
TABLE 32-25: A/D MODULE SPECIFICATIONS
AC CHARACTERISTICS Standard Ope r atin g Cond itio ns : 2 V to 3.6V
(unless oth erw ise st a ted)
Operating temperature -40°C T
A +85°C
Param
No. Symbol Characteristic Min. Typ Max. Units Conditions
Device Supply
AD01 AVDD Module VDD Supply Greater of
VDD – 0.3
or 2.2
—Lesser of
VDD + 0.3
or 3.6
V
AD02 AVSS Module VSS Supply VSS – 0.3 — VSS + 0.3 V
Reference In pu ts
AD05 VREFH Reference Voltage High AVSS + 1.7 — AVDD V
AD06 VREFL Reference Voltage Low AVSS —AVDD – 1.7 V
AD07 VREF Absolute Reference
Voltage
AVSS – 0.3 — AVDD + 0.3 V
Analog I npu t
AD10 VINH-VINL Full-Scale Input Span VREFL —VREFH V(Note 2)
AD11 VIN Absolute Input Voltage AVSS – 0.3 — AVDD + 0.3 V
AD12 VINL Absolute VINL Input
Voltage
AVSS – 0.3 — AVDD/3 V
AD13 Leakage Current — ±1.0 ±610 nA VINL = AVSS = VREFL = 0V,
AVDD = VREFH = 3V,
Source Impedance = 2.5 k
AD17 RIN Recommended Impedance
of Analog Voltage Source
— — 2.5K 10-bit
A/D Accuracy
AD20B Nr Resolution — 12 — bits
AD21B INL Integral Nonlinearity — ±1 <±2 LSb VINL = AVSS = VREFL = 0V,
AVDD = VREFH = 3V
AD22B DNL Differential Nonlinearity — — <±1 LSb VINL = AVSS = VREFL = 0V,
AVDD = VREFH = 3V
AD23B GERR Gain Error — ±1 ±3 LSb VINL = AVSS = VREFL = 0V,
AVDD = VREFH = 3V
AD24B EOFF Offset Error — ±1 ±2 LSb VINL = AVSS = VREFL = 0V,
AVDD = VREFH = 3V
AD25B Monotonicity(1)— — — — Guaranteed
Note 1: The A/D conversion result never decreases with an increase in the input voltage and has no missing
codes.
2: Measurements are taken with the external VREF+ and VREF- used as the A/D voltage reference.
2010-2011 Microchip Technology Inc. DS39996F-page 375
PIC24FJ128GA310 FAMILY
TABLE 32-26: A/D CONVERSION TIMING REQUIREMENTS(1)
AC CHARACTERISTICS Standard Operating Conditions: 2V to 3.6V
(unless otherwise stated)
Operating temperature -40°C TA +85°C
Param
No. Symbol Characteristic Min. Typ Max. Units Conditions
Clock Parameters
AD50 TAD A/D Clock Period 75 — — ns TCY = 75 ns, AD1CON3
in default state
AD51 tRC A/D Internal RC Oscillator Period — 250 — ns
Conversion Rate
AD55 tCONV Conversion Time — 14 — TAD
AD56 FCNV Throughput Rate — — 200 ksps AVDD > 2.7V
AD57 tSAMP Sample Time — 1 — TAD
Clock Parameters
AD61 tPSS Sample Start Delay from Setting
Sample bit (SAMP)
2—3TAD
Note 1: Because the sample caps will eventually lose charge, clock rates below 10 kHz can affect linearity
performance, especially at elevated temperatures.
PIC24FJ128GA310 FAMILY
DS39996F-page 376 2010-2011 Microchip Technology Inc.
NOTES:
2010-2011 Microchip Technology Inc. DS39996F-page 377
PIC24FJ128GA310 FAMILY
33.0 PACKAGING INFORMATION
33.1 Package Marking Info rmation
64-Lead TQFP (10x10x1 mm)
XXXXXXXXXX
XXXXXXXXXX
XXXXXXXXXX
YYWWNNN
Example
PIC24FJ128
GA306-I/
1120017
PT
3
e
Legend: XX...X Customer-specific information
Y Year code (last digit of calendar year)
YY Year code (last 2 digits of calendar year)
WW Week code (week of January 1 is week ‘01’)
NNN Alphanumeric traceability code
Pb-free JEDEC designator for Matte Tin (Sn)
*This package is Pb-free. The Pb-free JEDEC designator ( )
can be found on the outer packaging for this package.
Note: In the event the full Microchip part number cannot be marked on one line, it will
be carried over to the next line, thus limiting the number of available
characters for customer-specific information.
3
e
3
e
XXXXXXXXXXX
64-Lead QFN (9x9x0.9 mm)
XXXXXXXXXXX
XXXXXXXXXXX
YYWWNNN
PIC24FJ128
Example
GA306-I/MR
1150017
3
e
80-Lead TQFP (12x12x1mm)
XXXXXXXXXXXX
XXXXXXXXXXXX
YYWWNNN
Example
PIC24F128GA
308-I/PT
1150017
3
e
PIC24FJ128GA310 FAMILY
DS39996F-page 378 2010-2011 Microchip Technology Inc.
33.2 Package Marking Info rmation
100-Lead TQFP (12x12x1 mm)
XXXXXXXXXXXX
XXXXXXXXXXXX
YYWWNNN
Example
PIC24FJ128GA
310-I/PF
1150017
3
e
121-BGA (10x10x1.1 mm)
XXXXXXXXXXX
XXXXXXXXXXX
YYWWNNN
Example
PIC24FJ128
GA310-I/BG
1120017
3
e
100-Lead TQFP (14x14x1mm)
XXXXXXXXXXXX
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2010-2011 Microchip Technology Inc. DS39996F-page 379
PIC24FJ128GA310 FAMILY
33.3 Package Details
The following sections give the technical details of the packages.
Note: For the most current package drawings, please see the Microchip Packaging Specification located at
http://www.microchip.com/packaging
PIC24FJ128GA310 FAMILY
DS39996F-page 380 2010-2011 Microchip Technology Inc.
Note: For the most current package drawings, please see the Microchip Packaging Specification located at
http://www.microchip.com/packaging
2010-2011 Microchip Technology Inc. DS39996F-page 381
PIC24FJ128GA310 FAMILY
Note: For the most current package drawings, please see the Microchip Packaging Specification located at
http://www.microchip.com/packaging
PIC24FJ128GA310 FAMILY
DS39996F-page 382 2010-2011 Microchip Technology Inc.
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2010-2011 Microchip Technology Inc. DS39996F-page 385
PIC24FJ128GA310 FAMILY
Note: For the most current package drawings, please see the Microchip Packaging Specification located at
http://www.microchip.com/packaging
PIC24FJ128GA310 FAMILY
DS39996F-page 386 2010-2011 Microchip Technology Inc.
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2010-2011 Microchip Technology Inc. DS39996F-page 387
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2010-2011 Microchip Technology Inc. DS39996F-page 389
PIC24FJ128GA310 FAMILY
Note: For the most current package drawings, please see the Microchip Packaging Specification located at
http://www.microchip.com/packaging
PIC24FJ128GA310 FAMILY
DS39996F-page 390 2010-2011 Microchip Technology Inc.
Note: For the most current package drawings, please see the Microchip Packaging Specification located at
http://www.microchip.com/packaging
2010-2011 Microchip Technology Inc. DS39996F-page 391
PIC24FJ128GA310 FAMILY
Note: For the most current package drawings, please see the Microchip Packaging Specification located at
http://www.microchip.com/packaging
PIC24FJ128GA310 FAMILY
DS39996F-page 392 2010-2011 Microchip Technology Inc.
NOTES:
2010-2011 Microchip Technology Inc. DS39996F-page 393
PIC24FJ128GA310 FAMILY
APPENDIX A: REVISION HISTORY
Revision A (March 2010)
Original data sheet for the PIC24FJ128GA310 family of
devices.
Revision B (May 2011)
Changes in Reset values for TRISA in Table 4-12. Edits
to the “Special Microcontroller Features:”
Revision C (July 2011)
Updated the values in Section 32.0 “Electrical
Characteristics”. Special Function Register
addresses have been changed. The OCTRIG1 and
OCTRIG2 pins have been removed. Minor text edits
throughout the document.
Revision D (August 2011)
Updated VBAT specification; updated maximum values
for Section 32.0 “Electrical Characteristics”.
Revision E (October 2011)
• Removed the RTCBAT bit from the CW4<9>
register.
• Added the IDD/IPD numbers in the Section 32.0
“Electri cal Characterist ics”.
• Added details on the VBAT pin capacitor.
• Added Section 24.3 “A/D Operation with Vbat”.
Revision F (November 2011)
Updated the values in Section 32.0 “Electrical
Characteristics”. Minor text edits throughout the
document.
PIC24FJ128GA310 FAMILY
DS39996F-page 394 2010-2011 Microchip Technology Inc.
NOTES:
2010-2011 Microchip Technology Inc. DS39996F-page 395
PIC24FJ128GA310 FAMILY
INDEX
A
A/D
Extended DMA Operations ....................................... 297
Operation .................................................................. 295
Registers................................................................... 298
AC Characteristics
A/D Conversion Timing............................................. 375
Internal RC Accuracy................................................ 371
Load Conditions and Requirements for
Specifications.................................................... 369
Alternate Interrupt Vector Table (AIVT) .............................. 95
Assembler
MPASM Assembler................................................... 348
B
Block Diagrams
10-Bit A/D Converter Analog Input Model................. 311
12-Bit A/D Converter................................................. 296
16-Bit Asynchronous Timer3 and Timer5 ................. 201
16-Bit Synchronous Timer2 and Timer4 ................... 201
16-Bit Timer1 Module................................................ 197
32-Bit Timer2/3 and Timer4/5 ................................... 200
Accessing Program Space Using
Table Operations ................................................ 71
Addressing for Table Registers................................... 83
Buffer Address Generation in PIA Mode................... 299
CALL Stack Frame...................................................... 68
Comparator Voltage Reference ................................ 321
CPU Programmer’s Model .......................................... 37
CRC .......................................................................... 289
CRC Shift Engine Detail............................................ 289
CTMU Connections and Internal Configuration
for Capacitance Measurement.......................... 324
CTMU Typical Connections and Internal
Configuration for Pulse Delay Generation ........ 325
CTMU Typical Connections and Internal
Configuration for Time Measurement ............... 325
Data Access From Program Space Address
Generation .......................................................... 70
Data Signal Modulator .............................................. 249
DMA ............................................................................ 75
EDS Address Generation for Read............................. 66
EDS Address Generation for Write ............................. 67
High/Low-Voltage Detect (HLVD) ............................. 331
I2C Module ................................................................ 234
Individual Comparator Configurations,
CREF = 0.......................................................... 316
Individual Comparator Configurations,
CREF = 1 and CVREFP = 0 ............................. 317
Individual Comparator Configurations,
CREF = 1 and CVREFP = 1 ............................. 317
Input Capture ............................................................ 205
LCD Controller .......................................................... 265
On-Chip Regulator Connections ............................... 343
Output Compare (16-Bit Mode)................................. 212
Output Compare (Double-Buffered,
16-Bit PWM Mode) ........................................... 214
PCI24FJ256GA310 Family (General) ......................... 16
PIC24F CPU Core ...................................................... 36
PSV Operation (Lower Word) ..................................... 73
PSV Operation (Upper Word) ..................................... 73
Reset System.............................................................. 89
RTCC ........................................................................ 275
Shared I/O Port Structure ......................................... 167
SPI Master, Frame Master Connection .................... 230
SPI Master, Frame Slave Connection ...................... 230
SPI Master/Slave Connection (Enhanced
Buffer Modes) ................................................... 229
SPI Master/Slave Connection (Standard Mode)....... 229
SPI Slave, Frame Master Connection ...................... 230
SPI Slave, Frame Slave Connection ........................ 230
SPIx Module (Enhanced Mode)................................ 223
SPIx Module (Standard Mode) ................................. 222
System Clock............................................................ 145
Triple Comparator Module........................................ 315
UART (Simplified)..................................................... 241
Watchdog Timer (WDT)............................................ 344
C
C Compilers
MPLAB C18.............................................................. 348
Charge Time Measurement Unit. See CTMU.
Code Examples
Basic Sequence for Clock Switching ........................ 151
Configuring UART1 Input/Output
Functions (PPS) ............................................... 177
EDS Read From Program Memory in Assembly ........ 72
EDS Read in Assembly .............................................. 66
EDS Write in Assembly .............................................. 67
Erasing a Program Memory Block (Assembly) ........... 86
Erasing a Program Memory Block (C Language)....... 87
Initiating a Programming Sequence ........................... 87
Loading the Write Buffers ........................................... 87
Port Read/Write in Assembly.................................... 172
Port Read/Write in C................................................. 172
PWRSAV Instruction Syntax .................................... 156
Setting the RTCWREN Bit........................................ 276
Single-Word Flash Programming ............................... 88
Single-Word Flash Programming (C Language) ........ 88
Code Protection ................................................................ 345
Code Segment Protection ........................................ 345
Configuration Options....................................... 345
Configuration Protection........................................... 346
General Segment Protection .................................... 345
Comparator Voltage Reference ........................................ 321
Configuring ............................................................... 321
Configuration Bits ............................................................. 333
Core Features..................................................................... 11
CPU
Arithmetic Logic Unit (ALU) ........................................ 40
Control Registers........................................................ 38
Core Registers............................................................ 36
Programmer’s Model .................................................. 35
CRC
Polynomials .............................................................. 290
Setup Examples for 16 and 32-Bit Polynomials ....... 290
User Interface ........................................................... 290
CTMU
Measuring Capacitance ............................................ 323
Measuring Time........................................................ 324
Pulse Delay and Generation..................................... 324
Customer Change Notification Service............................. 400
Customer Notification Service .......................................... 400
Customer Support............................................................. 400
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DS39996F-page 396 2010-2011 Microchip Technology Inc.
D
Data Memory
Address Space............................................................ 43
Extended Data Space (EDS) ...................................... 65
Memory Map ............................................................... 43
Near Data Space ........................................................44
SFR Space.................................................................. 44
Software Stack............................................................ 68
Space Organization, Alignment .................................. 44
Data Signal Modulator....................................................... 249
Data Signal Modulator (DSM) ........................................... 249
DC Characteristics
Comparator ............................................................... 368
Comparator Voltage Reference ................................ 368
CTMU Current Source .............................................. 367
I/O Pin Input Specifications....................................... 365
I/O Pin Output Specifications ....................................366
Idle Current ...............................................................362
Operating Current ..................................................... 361
Power-Down Current ................................................363
Program Memory ...................................................... 366
Resets....................................................................... 364
Temperature and Voltage Specifications .................. 361
Vbat Operating Voltage Specifications ..................... 367
Development Support ....................................................... 347
Device Features
100-Pin........................................................................ 15
64-Pin.......................................................................... 13
80-Pin.......................................................................... 14
Direct Memory Access Controller. See DMA.
DMA .................................................................................... 75
Channel Trigger Sources ............................................ 82
Peripheral Module Disable (PMD) .............................. 78
Summary of Operations .............................................. 76
Types of Transfers ...................................................... 77
Typical Setup ..............................................................78
DMA Controller.................................................................... 12
E
Electrical Characteristics
Absolute Maximum Ratings ...................................... 359
Capacitive Loading on Output Pin ............................369
CLKO and I/O Timing................................................ 372
External Clock Timing ............................................... 370
High/Low-Voltage Detect .......................................... 368
Internal Voltage Regulator Specifications ................. 367
PLL Clock Timing Specifications............................... 371
RC Oscillator Start-up Time ......................................371
Reset and Brown-out Reset Requirements .............. 373
Thermal Conditions...................................................360
V/F Graph ................................................................. 360
Enhanced Parallel Master Port (EPMP)............................ 253
Enhanced Parallel Master Port. See EPMP...................... 253
EPMP
Key Features.............................................................253
Package Variations ................................................... 253
Equations
16-Bit, 32-Bit CRC Polynomials................................ 290
A/D Conversion Clock Period ................................... 311
Baud Rate Reload Calculation.................................. 235
Calculating the PWM Period..................................... 214
Calculation for Maximum PWM Resolution .............. 215
Relationship Between Device and
SPI Clock Speed .............................................. 231
UART Baud Rate with BRGH = 0 ............................. 242
UART Baud Rate with BRGH = 1 ............................. 242
Errata .................................................................................. 10
Extended Data Space (EDS) ............................................ 253
F
Flash Configuration Word Locations................................. 333
Flash Configuration Words ................................................. 42
Flash Program Memory ...................................................... 83
and Table Instructions ................................................ 83
Enhanced ICSP Operation ......................................... 84
JTAG Operation.......................................................... 84
Programming Algorithm .............................................. 86
Programming Operations............................................ 84
RTSP Operation ......................................................... 84
Single-Word Programming ......................................... 88
H
High/Low-Voltage Detect (HLVD) ..................................... 331
I
I/O Ports
Analog Port Pins Configuration (ANSx) .................... 168
Analog/Digital Function of an I/O Pin........................ 168
Input Change Notification ......................................... 172
Open-Drain Configuration......................................... 168
Parallel (PIO) ............................................................ 167
Peripheral Pin Select ................................................ 173
Pull-ups and Pull-Downs........................................... 172
Selectable Input Sources.......................................... 174
I2C
Clock Rates .............................................................. 235
Communicating as Master in Single
Master Environment ......................................... 233
Reserved Addresses ................................................ 235
Setting Baud Rate as Bus Master............................. 235
Slave Address Masking ............................................ 235
Input Capture
32-Bit Cascaded Mode ............................................. 206
Operations ................................................................ 206
Synchronous and Trigger Modes.............................. 205
Input Capture with Dedicated Timers ............................... 205
Input Voltage Levels for Port or Pin Tolerated
Description Input....................................................... 168
Instruction Set
Overview................................................................... 353
Summary .................................................................. 351
Symbols Used in Opcode Descriptions .................... 352
Interfacing Program and Data Spaces................................ 69
Inter-Integrated Circuit. See I2C. ...................................... 233
Internet Address ............................................................... 400
Interrupt Vector Table (IVT) ................................................ 95
2010-2011 Microchip Technology Inc. DS39996F-page 397
PIC24FJ128GA310 FAMILY
Interrupts
Control and Status Registers ...................................... 98
Implemented Vectors.................................................. 97
Reset Sequence ......................................................... 95
Setup and Service Procedures ................................. 143
Trap Vectors ............................................................... 96
Vector Table................................................................ 96
J
JTAG Interface.................................................................. 346
K
Key Features..................................................................... 333
L
LCD Controller .................................................................... 12
Liquid Crystal Display (LCD) Controller ............................ 265
M
Memory Organization.......................................................... 41
Microchip Internet Web Site.............................................. 400
Modulator. See Data Signal Modulator. ............................ 249
MPLAB ASM30 Assembler, Linker, Librarian ................... 348
MPLAB Integrated Development
Environment Software............................................... 347
MPLAB PM3 Device Programmer .................................... 350
MPLAB REAL ICE In-Circuit Emulator System................. 349
MPLINK Object Linker/MPLIB Object Librarian ................ 348
N
Near Data Space ................................................................ 44
O
On-Chip Voltage Regulator ............................................... 343
POR .......................................................................... 343
Standby Mode........................................................... 343
Oscillator Configuration
Bit Values for Clock Selection................................... 146
Clock Switching......................................................... 150
Sequence.......................................................... 151
Control Registers ...................................................... 147
CPU Clocking Scheme ............................................. 146
Initial Configuration on POR ..................................... 146
Reference Clock Output............................................ 152
Secondary Oscillator (SOSC) ................................... 152
Output Compare
32-Bit Cascaded Mode ............................................. 211
Synchronous and Trigger Modes.............................. 211
Output Compare with Dedicated Timers........................... 211
P
Packaging ......................................................................... 377
Details ....................................................................... 379
Marking ..................................................................... 377
Peripheral Pin Select (PPS).............................................. 173
Available Peripherals and Pins ................................. 173
Configuration Control................................................ 176
Considerations for Use ............................................. 177
Input Mapping ........................................................... 174
Mapping Exceptions.................................................. 176
Output Mapping ........................................................ 175
Peripheral Priority ..................................................... 173
Registers................................................................... 178
Pin Descriptions
121-Pin Devices (BGA)................................................. 7
Pinout Descriptions ............................................................. 17
Power-Saving Features .................................................... 155
Clock Frequency and Clock Switching ..................... 165
Doze Mode ............................................................... 165
Instruction-Based Modes.......................................... 156
Deep Sleep....................................................... 158
Idle.................................................................... 157
Sleep ................................................................ 157
Low-Voltage
Retention Regulator.......................................... 157
Vbat Mode ................................................................ 160
Product Identification System ........................................... 402
Program Memory
Access Using Table Instructions ................................ 71
Address Construction ................................................. 69
Address Space ........................................................... 41
Flash Configuration Words ......................................... 42
Hard Memory Vectors................................................. 42
Memory Maps ............................................................. 41
Organization ............................................................... 42
Reading From Program Memory Using EDS ............. 72
Program Verification ......................................................... 345
Pulse-Width Modulation (PWM) Mode.............................. 213
Pulse-Width Modulation. See PWM.
PWM
Duty Cycle and Period.............................................. 214
R
Reader Response............................................................. 401
Real-Time Clock and Calendar (RTCC) ........................... 275
Register Maps
A/D Converter............................................................. 56
Analog Configuration .................................................. 57
Comparators............................................................... 61
CPU Core ................................................................... 45
CRC............................................................................ 62
CTMU ......................................................................... 57
Data Signal Modulator (DSM)..................................... 61
Deep Sleep................................................................. 64
DMA............................................................................ 58
I2C .............................................................................. 51
ICN ............................................................................. 46
Input Capture.............................................................. 49
Interrupt Controller...................................................... 47
LCD Controller............................................................ 59
NVM............................................................................ 64
Output Compare ......................................................... 50
Pad Configuration....................................................... 55
Parallel Master/Slave Port .......................................... 60
Peripheral Pin Select .................................................. 62
PMD............................................................................ 64
PORTA ....................................................................... 53
PORTB ....................................................................... 53
PORTC ....................................................................... 54
PORTD ....................................................................... 54
PORTE ....................................................................... 54
PORTF ....................................................................... 55
PORTG....................................................................... 55
RTCC.......................................................................... 61
SPI.............................................................................. 53
System Control........................................................... 63
Timers......................................................................... 48
UART.......................................................................... 52
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DS39996F-page 398 2010-2011 Microchip Technology Inc.
Registers
AD1CHITH (A/D Scan Compare Hit, High Word) .....308
AD1CHITL (A/D Scan Compare Hit, Low Word)....... 308
AD1CHS (A/D Sample Select).................................. 306
AD1CON1 (A/D Control 1) ........................................300
AD1CON2 (A/D Control 2) ........................................302
AD1CON3 (A/D Control 3) ........................................303
AD1CON4 (A/D Control 4) ........................................304
AD1CON5 (A/D Control 5) ........................................305
AD1CSSH (A/D Input Scan Select, High Word) ....... 309
AD1CSSL (A/D Input Scan Select, Low Word) ......... 309
AD1CTMENH (CTMU Enable, High Word)............... 310
AD1CTMENL (CTMU Enable, Low Word) ................ 310
ALCFGRPT (Alarm Configuration)............................ 280
ALMINSEC (Alarm Minutes and Seconds Value) ..... 284
ALMTHDY (Alarm Month and Day Value) ................ 283
ALWDHR (Alarm Weekday and Hours Value) .......... 283
ANCFG (A/D Band Gap Reference) ......................... 307
ANSA (PORTA Analog Function Selection).............. 169
ANSB (PORTB Analog Function Selection).............. 169
ANSC (PORTC Analog Function Selection) ............. 170
ANSD (PORTD Analog Function Selection) ............. 170
ANSE (PORTE Analog Function Selection).............. 171
ANSG (PORTG Analog Function Selection) ............. 171
CLKDIV (Clock Divider) ............................................149
CMSTAT (Comparator Status)..................................319
CMxCON (Comparator x Control,
Comparators 1-3).............................................. 318
CORCON (CPU Core Control)............................ 39, 100
CRCCON1 (CRC Control 1) ..................................... 292
CRCCON2 (CRC Control 2) ..................................... 293
CRCXORH (CRC XOR High) ...................................294
CRCXORL (CRC XOR Polynomial, Low Byte) .........293
CTMUCON1 (CTMU Control 1) ................................326
CTMUCON2 (CTMU Control 2) ................................327
CTMUICON (CTMU Current Control) .......................329
CVRCON (Comparator Voltage
Reference Control)............................................ 322
CW1 (Flash Configuration Word 1)........................... 334
CW2 (Flash Configuration Word 2)........................... 336
CW3 (Flash Configuration Word 3)........................... 338
CW4 (Flash Configuration Word 4)........................... 340
DEVID (Device ID) ....................................................342
DEVREV (Device Revision) ......................................342
DMACHn (DMA Channel n Control) ........................... 80
DMACON (DMA Engine Control)................................ 79
DMAINTn (DMA Channel n Interrupt) ......................... 81
DSCON (Deep Sleep Control) .................................. 162
DSWAKE (Deep Sleep Wake-up Source) ................ 163
HLVDCON (High/Low-Voltage Detect Control)......... 332
I2CxCON (I2Cx Control) ...........................................236
I2CxMSK (I2Cx Slave Mode Address Mask) ............ 239
I2CxSTAT (I2Cx Status) ...........................................238
ICxCON1 (Input Capture x Control 1) ....................... 207
ICxCON2 (Input Capture x Control 2) ....................... 208
IEC0 (Interrupt Enable Control 0) ............................. 112
IEC1 (Interrupt Enable Control 1) ............................. 114
IEC2 (Interrupt Enable Control 2) ............................. 116
IEC3 (Interrupt Enable Control 3) ............................. 117
IEC4 (Interrupt Enable Control 4) ............................. 118
IEC5 (Interrupt Enable Control 5) ............................. 119
IEC6 (Interrupt Enable Control 6) ............................. 120
IEC7 (Interrupt Enable Control 7) ............................. 120
IFS0 (Interrupt Flag Status 0) ...................................103
IFS1 (Interrupt Flag Status 1) ...................................105
IFS2 (Interrupt Flag Status 2) ................................... 107
IFS3 (Interrupt Flag Status 3) ................................... 108
IFS4 (Interrupt Flag Status 4) ................................... 109
IFS5 (Interrupt Flag Status 5) ................................... 110
IFS6 (Interrupt Flag Status 6) ................................... 111
IFS7 (Interrupt Flag Status 7) ................................... 111
INTCON1 (Interrupt Control 1).................................. 101
INTCON2 (Interrupt Control 2).................................. 102
INTTREG (Interrupt Controller Test)......................... 142
IPC0 (Interrupt Priority Control 0) ............................. 121
IPC1 (Interrupt Priority Control 1) ............................. 122
IPC10 (Interrupt Priority Control 10) ......................... 131
IPC11 (Interrupt Priority Control 11) ......................... 132
IPC12 (Interrupt Priority Control 12) ......................... 133
IPC13 (Interrupt Priority Control 13) ......................... 134
IPC15 (Interrupt Priority Control 15) ......................... 135
IPC16 (Interrupt Priority Control 16) ......................... 136
IPC18 (Interrupt Priority Control 18) ......................... 137
IPC19 (Interrupt Priority Control 19) ......................... 137
IPC2 (Interrupt Priority Control 2) ............................. 123
IPC20 (Interrupt Priority Control 20) ......................... 138
IPC21 (Interrupt Priority Control 21) ......................... 139
IPC22 (Interrupt Priority Control 22) ......................... 140
IPC25 (Interrupt Priority Control 25) ......................... 141
IPC29 (Interrupt Priority Control 29) ......................... 141
IPC3 (Interrupt Priority Control 3) ............................. 124
IPC4 (Interrupt Priority Control 4) ............................. 125
IPC5 (Interrupt Priority Control 5) ............................. 126
IPC6 (Interrupt Priority Control 6) ............................. 127
IPC7 (Interrupt Priority Control 7) ............................. 128
IPC8 (Interrupt Priority Control 8) ............................. 129
IPC9 (Interrupt Priority Control 9) ............................. 130
LCDCON (LCD Control) ........................................... 266
LCDCREG (LCD Charge Pump Control).................. 268
LCDDATAx (LCD Pixel Data x) ................................ 270
LCDPS (LCD Phase)................................................ 269
LCDREF (LCD Reference Ladder Control) .............. 272
LCDSEx (LCD Segment x Enable) ........................... 270
MDCAR (Modulator Carrier Control)......................... 252
MDCON (Modulator Control) .................................... 250
MDSRC (Modulator Source Control) ........................ 251
MINSEC (RTCC Minutes and Seconds Value)......... 282
MTHDY (RTCC Month and Day Value) .................... 281
OCxCON1 (Output Compare x Control 1) ................ 216
OCxCON2 (Output Compare x Control 2) ................ 218
OSCCON (Oscillator Control)................................... 147
OSCTUN (FRC Oscillator Tune)............................... 150
PADCFG1 (Pad Configuration Control) .................... 263
PMCON1 (EPMP Control 1) ..................................... 255
PMCON2 (EPMP Control 2) ..................................... 256
PMCON3 (EPMP Control 3) ..................................... 257
PMCON4 (EPMP Control 4) ..................................... 258
PMCSxBS (Chip Select x Base Address)................. 260
PMCSxCF (Chip Select x Configuration).................. 259
PMCSxMD (Chip Select x Mode) ............................. 261
PMSTAT (EPMP Status, Slave Mode) ..................... 262
RCFGCAL (RTCC Calibration and Configuration).... 277
RCON (Reset Control)................................................ 90
RCON2 (Reset and System Control 2)..................... 164
RCON2 (Reset Control 2)........................................... 92
REFOCON (Reference Oscillator Control) ............... 153
RPINR0 (PPS Input 0).............................................. 178
RPINR1 (PPS Input 1).............................................. 178
RPINR10 (PPS Input 10).......................................... 182
RPINR11 (PPS Input 11).......................................... 182
2010-2011 Microchip Technology Inc. DS39996F-page 399
PIC24FJ128GA310 FAMILY
RPINR17 (PPS Input 17) .......................................... 183
RPINR18 (PPS Input 18) .......................................... 183
RPINR19 (PPS Input 19) .......................................... 184
RPINR2 (PPS Input 2) .............................................. 179
RPINR20 (PPS Input 20) .......................................... 184
RPINR21 (PPS Input 21) .......................................... 185
RPINR22 (PPS Input 22) .......................................... 185
RPINR23 (PPS Input 23) .......................................... 186
RPINR27 (PPS Input 27) .......................................... 186
RPINR3 (PPS Input 3) .............................................. 179
RPINR30 (PPS Input 30) .......................................... 187
RPINR31 (PPS Input 31) .......................................... 187
RPINR4 (PPS Input 4) .............................................. 180
RPINR7 (PPS Input 7) .............................................. 180
RPINR8 (PPS Input 8) .............................................. 181
RPINR9 (PPS Input 9) .............................................. 181
RPOR0 (PPS Output 0) ............................................ 188
RPOR1 (PPS Output 1) ............................................ 188
RPOR10 (PPS Output 10) ........................................ 193
RPOR11 (PPS Output 11) ........................................ 193
RPOR12 (PPS Output 12) ........................................ 194
RPOR13 (PPS Output 13) ........................................ 194
RPOR14 (PPS Output 14) ........................................ 195
RPOR15 (PPS Output 15) ........................................ 195
RPOR2 (PPS Output 2) ............................................ 189
RPOR3 (PPS Output 3) ............................................ 189
RPOR4 (PPS Output 4) ............................................ 190
RPOR5 (PPS Output 5) ............................................ 190
RPOR6 (PPS Output 6) ............................................ 191
RPOR7 (PPS Output 7) ............................................ 191
RPOR8 (PPS Output 8) ............................................ 192
RPOR9 (PPS Output 9) ............................................ 192
RTCCSWT (Power Control and Sample
Window Timer).................................................. 285
RTCPWC (RTCC Power Control) ............................. 279
SPIxCON1 (SPIx Control 1)...................................... 226
SPIxCON2 (SPIx Control 2)...................................... 228
SPIxSTAT (SPIx Status and Control) ....................... 224
SR (ALU STATUS) ............................................... 38, 99
T1CON (Timer1 Control)........................................... 198
TxCON (Timer2 and Timer4 Control)........................ 202
TyCON (Timer3 and Timer5 Control)........................ 203
UxMODE (UARTx Mode).......................................... 244
UxSTA (UARTx Status and Control)......................... 246
WKDYHR (RTCC Weekday and Hours Value)......... 282
YEAR (RTCC Year Value)........................................ 281
Resets
BOR (Brown-out Reset).............................................. 89
Brown-out Reset (BOR).............................................. 93
Clock Source Selection............................................... 93
CM (Configuration Mismatch Reset)........................... 89
Delay Times ................................................................ 94
Device Times .............................................................. 93
IOPUWR (Illegal Opcode Reset) ................................ 89
MCLR (Pin Reset)....................................................... 89
POR (Power-on Reset) ............................................... 89
RCON Flags, Operation.............................................. 93
SFR States.................................................................. 93
SWR (RESET Instruction)........................................... 89
TRAPR (Trap Conflict Reset)...................................... 89
UWR (Uninitialized W Register Reset) ....................... 89
WDT (Watchdog Timer Reset).................................... 89
Revision History................................................................ 393
RTCC
Alarm Configuration.................................................. 286
Alarm Mask Settings (figure) .................................... 287
Calibration ................................................................ 286
Clock Source Selection ............................................ 276
Power Control........................................................... 287
Register Mapping ..................................................... 276
Source Clock ............................................................ 275
Write Lock................................................................. 276
S
Selective Peripheral Power Control .................................. 165
Serial Peripheral Interface (SPI) ....................................... 221
Serial Peripheral Interface. See SPI.
SFR Space ......................................................................... 44
Software Simulator (MPLAB SIM) .................................... 349
Software Stack ................................................................... 68
Special Features................................................................. 12
SPI.................................................................................... 221
T
Timer1 .............................................................................. 197
Timer2/3 and Timer4/5 ..................................................... 199
Timing Diagrams
CLKO and I/O Timing ............................................... 372
External Clock .......................................................... 370
Triple Comparator............................................................. 315
Triple Comparator Module................................................ 315
U
UART ................................................................................ 241
Baud Rate Generator (BRG) .................................... 242
Infrared Support........................................................ 243
Operation of UxCTS and UxRTS Pins...................... 243
Receiving
8-Bit or 9-Bit Data Mode ................................... 243
Transmitting
8-Bit Data Mode................................................ 243
9-Bit Data Mode................................................ 243
Break and Sync Sequence ............................... 243
Universal Asynchronous Receiver Transmitter. See UART.
W
Watchdog Timer (WDT).................................................... 344
Control Register........................................................ 344
Windowed Operation ................................................ 344
WWW Address ................................................................. 400
WWW, On-Line Support ..................................................... 10
PIC24FJ128GA310 FAMILY
DS39996F-page 400 2010-2011 Microchip Technology Inc.
NOTES:
2010-2011 Microchip Technology Inc. DS39996F-page 401
PIC24FJ128GA310 FAMILY
THE MICROCHIP WEB SITE
Microchip provides online support via our WWW site at
www.microchip.com. This web site is used as a means
to make files and information easily available to
customers. Accessible by using your favorite Internet
browser, the web site contains the following
information:
•Product Support – Data sheets and errata,
application notes and sample programs, design
resources, user’s guides and hardware support
documents, latest software releases and archived
software
•General Technical Support – Frequently Asked
Questions (FAQ), technical support requests,
online discussion groups, Microchip consultant
program member listing
•Business of Microchip – Product selector and
ordering guides, latest Microchip press releases,
listing of seminars and events, listings of
Microchip sales offices, distributors and factory
representatives
CUSTOMER CHANGE NOTIFICATION
SERVICE
Microchip’s customer notification service helps keep
customers current on Microchip products. Subscribers
will receive e-mail notification whenever there are
changes, updates, revisions or errata related to a
specified product family or development tool of interest.
To register, access the Microchip web site at
www.microchip.com. Under “Support”, click on
“Customer Change Notification” and follow the
registration instructions.
CUSTOMER SUPP ORT
Users of Microchip products can receive assistance
through several channels:
• Distributor or Representative
• Local Sales Office
• Field Application Engineer (FAE)
• Technical Support
• Development Systems Information Line
Customers should contact their distributor,
representative or field application engineer (FAE) for
support. Local sales offices are also available to help
customers. A listing of sales offices and locations is
included in the back of this document.
Technic al suppo rt is avail able throug h the we b site
at: http://microchip.com/support
PIC24FJ128GA310 FAMILY
DS39996F-page 402 2010-2011 Microchip Technology Inc.
READER RESP ONSE
It is our intention to provide you with the best documentation possible to ensure successful use of your Microchip
product. If you wish to provide your comments on organization, clarity, subject matter, and ways in which our
documentation can better serve you, please FAX your comments to the Technical Publications Manager at
(480) 792-4150.
Please list the following information, and use this outline to provide us with your comments about this document.
TO: Technical Publications Manager
RE: Reader Response
Total Pages Sent ________
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Telephone: (_______) _________ - _________
Application (optional):
Would you like a reply? Y N
Device: Literature Number:
Questions:
FAX: (______) _________ - _________
DS39996EPIC24FJ128GA310 Family
1. What are the best features of this document?
2. How does this document meet your hardware and software development needs?
3. Do you find the organization of this document easy to follow? If not, why?
4. What additions to the document do you think would enhance the structure and subject?
5. What deletions from the document could be made without affecting the overall usefulness?
6. Is there any incorrect or misleading information (what and where)?
7. How would you improve this document?
2010-2011 Microchip Technology Inc. DS39996F-page 403
PIC24FJ128GA310 FAMILY
PRODUCT IDENTIFICATION SYSTEM
To order or obtain information, e.g., on pricing or delivery, refer to the factory or the listed sales office.
Architecture 24 = 16-bit modified Harvard without DSP
Flash Memory Family FJ = Flash program memory
Product Group GA3 = General-purpose microcontrollers with
LCD Controller and nanoWatt XLP Technology
Pin Count 06 = 64-pin
08 = 80-pin
10 = 100-pin (TQFP) and 121-pin (BGA)
Temperature Range I = -40C to +85C (Industrial)
Package BG = 121-pin (10x10x1.4 mm) BGA package
PT = 100-lead (12x12x1 mm) TQFP (Thin Quad Flatpack)
PF = 100-lead (14x14x1 mm) TQFP (Thin Quad Flatpack)
PT = 80-pin (12x12x1 mm) TQFP (Thin Quad Flatpack)
PT = 64-lead (10x10x1 mm) TQFP (Thin Quad Flatpack)
MR = 64-lead (9x9x0.9 mm) QFN (Quad Flatpack, No Lead)
Pattern Three-digit QTP, SQTP, Code or Special Requirements
(blank otherwise)
ES = Engineering Sample
Examples:
a) PIC24FJ64GA306-I/MR:
PIC24F device with LCD Controller and nano-
Watt XLP Technology, 64 KB program memory,
64-pin, Industrial temp., QFN package.
b) PIC24FJ128GA308-I/PT:
PIC24F device with LCD Controller and nano-
Watt XLP Technology, 128 KB program
memory, 80-pin, Industrial temp., TQFP
package.
c) PIC24FJ128GA210-I/BG:
PIC24F device with LCD Controller and nano-
Watt XLP Technology, 128 KB program
memory, 121-pin, Industrial temp., BGA
package.
Microchip T rademark
Architecture
Flash Memory Family
Program Memory Size (KB)
Product Group
Pin Coun t
Temperature Range
Package
Pattern
PIC 24 FJ 128 GA3 10 T - I / PT - XXX
Tape and Reel Flag (if applicable)
PIC24FJ128GA310 FAMILY
DS39996F-page 404 2010-2011 Microchip Technology Inc.
NOTES:
2010-2011 Microchip Technology Inc. DS39996F-page 405
Information contained in this publication regarding device
applications and the like is provided only for your convenience
and may be superseded by updates. It is your responsibility to
ensure that your application meets with your specifications.
MICROCHIP MAKES NO REPRESENTATIONS OR
WARRANTIES OF ANY KIND WHETHER EXPRESS OR
IMPLIED, WRITTEN OR ORAL, STATUTORY OR
OTHERWISE, RELATED TO THE INFORMATION,
INCLUDING BUT NOT LIMITED TO ITS CONDITION,
QUALITY, PERFORMANCE, MERCHANTABILITY OR
FITNESS FOR PURPOSE. Microchip disclaims all liability
arising from this information and its use. Use of Microchip
devices in life support and/or safety applications is entirely at
the buyer’s risk, and the buyer agrees to defend, indemnify and
hold harmless Microchip from any and all damages, claims,
suits, or expenses resulting from such use. No licenses are
conveyed, implicitly or otherwise, under any Microchip
intellectual property rights.
Trademarks
The Microchip name and logo, the Microchip logo, dsPIC,
KEELOQ, KEELOQ logo, MPLAB, PIC, PICmicro, PICSTART,
PIC32 logo, rfPIC and UNI/O are registered trademarks of
Microchip Technology Incorporated in the U.S.A. and other
countries.
FilterLab, Hampshire, HI-TECH C, Linear Active Thermistor,
MXDEV, MXLAB, SEEVAL and The Embedded Control
Solutions Company are registered trademarks of Microchip
Technology Incorporated in the U.S.A.
Analog-for-the-Digital Age, Application Maestro, chipKIT,
chipKIT logo, CodeGuard, dsPICDEM, dsPICDEM.net,
dsPICworks, dsSPEAK, ECAN, ECONOMONITOR,
FanSense, HI-TIDE, In-Circuit Serial Programming, ICSP,
Mindi, MiWi, MPASM, MPLAB Certified logo, MPLIB,
MPLINK, mTouch, Omniscient Code Generation, PICC,
PICC-18, PICDEM, PICDEM.net, PICkit, PICtail, REAL ICE,
rfLAB, Select Mode, Total Endurance, TSHARC,
UniWinDriver, WiperLock and ZENA are trademarks of
Microchip Technology Incorporated in the U.S.A. and other
countries.
SQTP is a service mark of Microchip Technology Incorporated
in the U.S.A.
All other trademarks mentioned herein are property of their
respective companies.
© 2010-2011, Microchip Technology Incorporated, Printed in
the U.S.A., All Rights Reserved.
Printed on recycled paper.
ISBN: 978-1-61341-759-1
Note the following details of the code protection feature on Microchip devices:
• Microchip products meet the specification contained in their particular Microchip Data Sheet.
• Microchip believes that its family of products is one of the most secure families of its kind on the market today, when used in the
intended manner and under normal conditions.
• There are dishonest and possibly illegal methods used to breach the code protection feature. All of these methods, to our
knowledge, require using the Microchip products in a manner outside the operating specifications contained in Microchip’s Data
Sheets. Most likely, the person doing so is engaged in theft of intellectual property.
• Microchip is willing to work with the customer who is concerned about the integrity of their code.
• Neither Microchip nor any other semiconductor manufacturer can guarantee the security of their code. Code protection does not
mean that we are guaranteeing the product as “unbreakable.”
Code protection is constantly evolving. We at Microchip are committed to continuously improving the code protection features of our
products. Attempts to break Microchip’s code protection feature may be a violation of the Digital Millennium Copyright Act. If such acts
allow unauthorized access to your software or other copyrighted work, you may have a right to sue for relief under that Act.
Microchip received ISO/TS-16949:2009 certification for its worldwide
headquarters, design and wafer fabrication facilities in Chandler and
Tempe, Arizona; Gresham, Oregon and design centers in California
and India. The Company’s quality system processes and procedures
are for its PIC® MCUs and dsPIC® DSCs, KEELOQ® code hoppi ng
devices, Serial EEPROMs, microperiph erals, nonvolatile memory and
analog products. In addition, Microchip’s quality system for the design
and manufacture of development systems is ISO 9001:2000 certified.
DS39996F-page 406 2010-2011 Microchip Technology Inc.
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08/02/11
