18.2 PPS Inputs
Each digital peripheral has a dedicated PPS Peripheral Input Selection (xxxPPS) register with which the input pin to the peripheral is selected. Devices that have 20 leads or less (8/14/16/20) allow PPS routing to any I/O pin, while devices with 28 leads or more allow PPS routing to I/Os contained within two ports (see the table below).
Multiple peripherals can operate from the same source simultaneously. Port reads always return the pin level regardless of peripheral PPS selection. If a pin also has analog functions associated, the ANSEL bit for that pin must be cleared to enable the digital input buffer.
Peripheral | PPS Input Register | Register Reset Value at POR | Default Pin Selection at POR | ||||
---|---|---|---|---|---|---|---|
8-Pin Devices | 14/16-Pin Devices | 20-Pin Devices | 8-Pin Devices | 14/16-Pin Devices | 20-Pin Devices | ||
External Interrupt | INTPPS | ‘b000
010 |
RA2 | ||||
Timer0 Clock | T0CKIPPS | ‘b000
010 |
RA2 | ||||
Timer1 Clock | T1CKIPPS | ‘b000
101 |
RA5 | ||||
Timer1 Gate | T1GPPS | ‘b000
100 |
RA4 | ||||
Timer3 Clock | T3CKIPPS | ‘b000 000 |
‘b010
101 |
RA0 | RC5 | ||
Timer3 Gate | T3GPPS | ‘b000 000 |
‘b010
100 |
RA0 | RC4 | ||
Timer2 Input | T2INPPS | ‘b000
101 |
RA5 | ||||
Timer4 Input | T4INPPS | ‘b000 000 |
‘b010
001 |
RA0 | RC1 | ||
CCP1 | CCP1PPS | ‘b000 101 |
‘b010
101 |
RA5 | RC5 | ||
CCP2 | CCP2PPS | ‘b000 101 |
‘b010
011 |
RA5 | RC3 | ||
PWM Input 0 | PWMIN0PPS | ‘b000 000 |
‘b010
101 |
RA0 | RC5 | ||
PWM Input 1 | PWMIN1PPS | ‘b000 000 |
‘b010
011 |
RA0 | RC3 | ||
PWM1 External Reset | PWMIN1ERSPPS | ‘b000
101 |
RA5 | ||||
PWM2 External Reset | PWMIN2ERSPPS | ‘b000 000 |
‘b010
001 |
RA0 | RC1 | ||
CWG1 Input | CWG1PPS | ‘b000
010 |
RA2 | ||||
CLCIN0 | CLCIN0PPS | ‘b000 011 |
‘b010 011 |
‘b000 010 |
RA3 | RC3 | RA2 |
CLCIN1 | CLCIN1PPS | ‘b000 101 |
‘b010 100 |
‘b010 011 |
RA5 | RC4 | RC3 |
CLCIN2 | CLCIN2PPS | ‘b000 001 |
‘b010 001 |
‘b001 100 |
RA1 | RC1 | RB4 |
CLCIN3 | CLCIN3PPS | ‘b000 000 |
‘b000 101 |
‘b001 101 |
RA0 | RA5 | RB5 |
SCL1/SCK1 | SSP1CLKPPS(1) | ‘b000 001 |
‘b010 000 |
‘b001 110 |
RA1 | RC0 | RB6 |
SDA1/SDI1 | SSP1DATPPS(1) | ‘b000 010 |
‘b010 001 |
‘b001 100 |
RA2 | RC1 | RB4 |
SS1 | SSP1SSPPS | ‘b000 011 |
‘b010 011 |
‘b010 110 |
RA3 | RC3 | RC6 |
SCL2/SCK2 | SSP2CLKPPS(1) | ‘b000 000 |
‘b010 100 |
‘b001 111 |
RA0 | RC4 | RB7 |
SDA2/SDI2 | SSP2DATPPS(1) | ‘b000 000 |
‘b010 101 |
‘b001 101 |
RA0 | RC5 | RB5 |
SS2 | SSP2SSPPS | ‘b000
000 |
‘b000 001 |
RA0 | RA1 | ||
RX1/DT1 | RX1PPS | ‘b000 001 |
‘b010 101 |
‘b001 101 |
RA1 | RC5 | RB5 |
CK1 | CK1PPS | ‘b000 000 |
‘b010 100 |
‘b001 111 |
RA0 | RC4 | RB7 |
RX2/DT2 | RX2PPS | ‘b000 001 |
‘b010
001 |
RA1 | RC1 | ||
CK2 | CK2PPS | ‘b000 000 |
‘b010
000 |
RA0 | RC0 | ||
ADC Conversion Trigger | ADACTPPS | ‘b000 101 |
‘b010
010 |
RA5 | RC2 |
- Bidirectional pin. The corresponding output must select the same pin.