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 | Default Pin Selection at POR | Register Reset Value at POR | Available Input Port | |||||||
---|---|---|---|---|---|---|---|---|---|---|---|
28-Pin Devices | 40-Pin Devices | ||||||||||
External Interrupt | INTPPS | RB0 | ‘b001 000 | A | B | — | A | B | — | — | — |
Timer0 Clock | T0CKIPPS | RA4 | ‘b000 100 | A | B | — | A | B | — | — | — |
Timer1 Clock | T1CKIPPS | RC0 | ‘b010 000 | A | — | C | A | — | C | — | — |
Timer1 Gate | T1GPPS | RB5 | ‘b001 101 | — | B | C | — | B | C | — | — |
Timer3 Clock | T3CKIPPS | RC0 | ‘b010 000 | — | B | C | — | B | C | — | — |
Timer3 Gate | T3GPPS | RC0 | ‘b010 000 | A | — | C | A | — | C | — | — |
Timer2 Input | T2INPPS | RC3 | ‘b010 011 | A | — | C | A | — | C | — | — |
Timer4 Input | T4INPPS | RC5 | ‘b010 101 | — | B | C | — | B | C | — | — |
Timer6 Input | T6INPPS | RB7 | ‘b001 111 | — | B | C | — | B | — | D | — |
CCP1 | CCP1PPS | RC2 | ‘b010 010 | — | B | C | — | B | C | — | — |
CCP2 | CCP2PPS | RC1 | ‘b010 001 | — | B | C | — | B | C | — | — |
CWG1 | CWG1PPS | RB0 | ‘b001 000 | — | B | C | — | B | — | D | — |
CLCIN0 | CLCIN0PPS | RA0 | ‘b000 000 | A | — | C | A | — | C | — | — |
CLCIN1 | CLCIN1PPS | RA1 | ‘b000 001 | A | — | C | A | — | C | — | — |
CLCIN2 | CLCIN2PPS | RB6 | ‘b001 110 | — | B | C | — | B | — | D | — |
CLCIN3 | CLCIN3PPS | RB7 | ‘b001 111 | — | B | C | — | B | — | D | — |
SCL1/SCK1 | SSP1CLKPPS(1) | RC3 | ‘b010 011 | — | B | C | — | B | C | — | — |
SDA1/SDI1 | SSP1DATPPS(1) | RC4 | ‘b010 100 | — | B | C | — | B | C | — | — |
SS1 | SSP1SSPPS | RA5 | ‘b000 101 | A | — | C | A | — | — | D | — |
SCL2/SCK2 | SSP2CLKPPS(1) | RB1 | ‘b001 001 | — | B | C | — | B | — | D | — |
SDA2/SDI2 | SSP2DATPPS(1) | RB2 | ‘b001 010 | — | B | C | — | B | — | D | — |
SS2 | SSP2SSPPS | RB0 | ‘b001 000 | — | B | C | — | B | — | D | — |
RX1/DT1 | RX1PPS | RC7 | ‘b010 111 | — | B | C | — | B | C | — | — |
CK1 | CK1PPS | RC6 | ‘b010 110 | — | B | C | — | B | C | — | — |
RX2/DT2 | RX2PPS | RB7 | ‘b001 111 | — | B | C | — | B | — | D | — |
CK2 | CK2PPS | RB6 | ‘b001 110 | — | B | C | — | B | — | D | — |
ADC Conversion Trigger | ADACTPPS | RB4 | ‘b001 100 | — | B | C | — | B | — | D | — |
- Bidirectional pin. The corresponding output must select the same pin.