21.2 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 | 48-Pin Devices | |||||||||||||||
Interrupt 0 | INT0PPS | RB0 | 'b001 000 |
A | B | — | A | B | — | — | — | A | B | — | — | — | — |
Interrupt 1 | INT1PPS | RB1 | 'b001 001 |
A | B | — | A | B | — | — | — | — | B | — | D | — | — |
Interrupt 2 | INT2PPS | RB2 | 'b001 010 |
A | B | — | A | B | — | — | — | — | B | — | — | — | F |
Timer0 Clock | T0CKIPPS | RA4 | 'b000 100 |
A | B | — | A | B | — | — | — | A | — | — | — | — | F |
Timer1 Clock | T1CKIPPS | RC0 | 'b010 000 |
A | — | C | A | — | C | — | — | — | — | C | — | E | — |
Timer1 Gate | T1GPPS | RB5 | 'b001 101 |
— | B | C | — | B | C | — | — | — | B | C | — | — | — |
Timer3 Clock | T3CKIPPS | RC0 | 'b010 000 |
— | B | C | — | B | C | — | — | — | — | C | — | E | — |
Timer3 Gate | T3GPPS | RC0 | 'b010 000 |
A | — | C | A | — | C | — | — | A | — | C | — | — | — |
Timer5 Clock | T5CKIPPS | RC2 | 'b010 010 |
A | — | C | A | — | C | — | — | — | — | C | — | E | — |
Timer5 Gate | T5GPPS | RB4 | 'b001 100 |
— | B | C | — | B | — | D | — | — | B | — | D | — | — |
Timer2 Input | T2INPPS | RC3 | 'b010 011 |
A | — | C | A | — | C | — | — | A | — | C | — | — | — |
Timer4 Input | T4INPPS | RC5 | 'b010 101 |
— | B | C | — | B | C | — | — | — | B | C | — | — | — |
Timer6 Input | T6INPPS | RB7 | 'b001 111 |
— | B | C | — | B | — | D | — | — | B | — | D | — | — |
CCP1 | CCP1PPS | RC2 | 'b010 010 |
— | B | C | — | B | C | — | — | — | — | C | — | — | F |
CCP2 | CCP2PPS | RC1 | 'b010 001 |
— | B | C | — | B | C | — | — | — | — | C | — | — | F |
CCP3 | CCP3PPS | RB5 | 'b001 101 |
— | B | C | — | B | — | D | — | — | B | — | D | — | — |
SMT1 Window | SMT1WINPPS | RC0 | 'b010 000 |
— | B | C | — | B | C | — | — | — | — | C | — | — | F |
SMT1 Signal | SMT1SIGPPS | RC1 | 'b010 001 |
— | B | C | — | B | C | — | — | — | — | C | — | — | F |
PWM Input 0 | PWMIN0PPS | RC2 | 'b010 010 |
— | B | C | — | B | C | — | — | — | — | C | — | — | F |
PWM Input 1 | PWMIN1PPS | RC6 | 'b010 110 |
A | — | C | A | — | — | — | E | A | — | — | — | E | — |
PWM1 External Reset Source | PWM1ERSPPS | RC3 | 'b010 011 |
A | — | C | A | — | C | — | — | A | — | C | — | — | |
PWM2 External Reset Source | PWM2ERSPPS | RC5 | 'b010 101 |
A | — | C | A | — | C | — | — | — | — | C | — | E | — |
PWM3 External Reset Source | PWM3ERSPPS | RB7 | 'b001 111 |
— | B | C | — | B | — | D | — | — | B | — | D | — | — |
CWG1 | CWG1PPS | RB0 | 'b001 000 |
— | B | C | — | B | — | D | — | — | B | — | D | — | — |
CWG2 | CWG2PPS | RB1 | 'b001 001 |
— | B | C | — | B | — | D | — | — | B | — | D | — | — |
CWG3 | CWG3PPS | RB2 | 'b001 010 |
— | B | C | — | B | — | D | — | — | B | — | D | — | — |
DSM1 Carrier Low | MD1CARLPPS | RA3 | 'b000 011 |
A | — | C | A | — | — | D | — | A | — | — | D | — | — |
DSM1 Carrier High | MD1CARHPPS | RA4 | 'b000 100 |
A | — | C | A | — | — | D | — | A | — | — | D | — | — |
DSM1 Source | MD1SRCPPS | RA5 | 'b000 101 |
A | — | C | A | — | — | D | — | A | — | — | D | — | — |
CLCx Input 1 | CLCIN0PPS | RA0 | 'b000 000 |
A | — | C | A | — | C | — | — | A | — | C | — | — | — |
CLCx Input 2 | CLCIN1PPS | RA1 | 'b000 001 |
A | — | C | A | — | C | — | — | A | — | C | — | — | — |
CLCx Input 3 | CLCIN2PPS | RB6 | 'b001 110 |
— | B | C | — | B | — | D | — | — | B | — | D | — | — |
CLCx Input 4 | CLCIN3PPS | RB7 | 'b001 111 |
— | B | C | — | B | — | D | — | — | B | — | D | — | — |
CLCx Input 5 | CLCIN4PPS | RA0 | 'b000 000 |
A | — | C | A | — | C | — | — | A | — | C | — | — | — |
CLCx Input 6 | CLCIN5PPS | RA1 | 'b000 001 |
A | — | C | A | — | C | — | — | A | — | C | — | — | — |
CLCx Input 7 | CLCIN6PPS | RB6 | 'b001 110 |
— | B | C | — | B | — | D | — | — | B | — | D | — | — |
CLCx Input 8 | CLCIN7PPS | RB7 | 'b001 111 |
— | B | C | — | B | — | D | — | — | B | — | D | — | — |
ADC Conversion Trigger | ADACTPPS | RB4 | 'b001 100 |
— | B | C | — | B | — | D | — | — | B | — | D | — | — |
SPI1 Clock | SPI1SCKPPS | RC3 | 'b010 011 |
— | B | C | — | B | C | — | — | — | B | C | — | — | — |
SPI1 Data | SPI1SDIPPS | RC4 | 'b010 100 |
— | B | C | — | B | C | — | — | — | B | C | — | — | — |
SPI1 Client Select | SPI1SSPPS | RA5 | 'b000 101 |
A | — | C | A | — | — | D | — | A | — | — | D | — | — |
SPI2 Clock | SPI2SCKPPS | RB3 | 'b001 011 |
— | B | C | — | B | — | D | — | — | B | — | D | — | — |
SPI2 Data | SPI2SDIPPS | RB2 | 'b001 010 |
— | B | C | — | B | — | D | — | — | B | — | D | — | — |
SPI2 Client Select | SPI2SSPPS | RA4 | 'b000 100 |
A | — | C | A | — | — | D | — | A | — | — | D | — | — |
I2C1 Clock | I2C1SCLPPS(1) | RC3 | 'b010 011 |
— | B | C | — | B | C | — | — | — | B | C | — | — | — |
I2C1 Data | I2C1SDAPPS(1) | RC4 | 'b010 100 |
— | B | C | — | B | C | — | — | — | B | C | — | — | — |
UART1 Receive | U1RXPPS | RC7 | 'b010 111 |
— | B | C | — | B | C | — | — | — | — | C | — | — | F |
UART1 Clear to Send | U1CTSPPS | RC6 | 'b010 110 |
— | B | C | — | B | C | — | — | — | — | C | — | — | F |
UART2 Receive | U2RXPPS | RB7 | 'b001 111 |
— | B | C | — | B | — | D | — | — | B | — | D | — | — |
UART2 Clear to Send | U2CTSPPS | RB6 | 'b001 110 |
— | B | C | — | B | — | D | — | — | B | — | D | — | — |
UART3 Receive | U3RXPPS | RA7 | 'b000 111 |
A | B | — | A | B | — | — | — | A | — | — | — | — | F |
UART3 Clear to Send | U3CTSPPS | RA6 | 'b000 110 |
A | B | — | A | B | — | — | — | A | — | — | — | — | F |
UART4 Receive | U4RXPPS | RB5 | 'b001 101 |
— | B | C | — | B | — | D | — | — | B | — | D | — | — |
UART4 Clear to Send | U4CTSPPS | RB4 | 'b001 100 |
— | B | C | — | B | — | D | — | — | B | — | D | — | — |
UART5 Receive | U5RXPPS | RA5 | 'b000 101 |
A | — | C | A | — | C | — | — | A | — | — | — | — | F |
UART5 Clear to Send | U5CTSPPS | RA4 | 'b000 100 |
A | — | C | A | — | C | — | — | A | — | — | — | — | F |
- Bidirectional pin. The corresponding output must select the same pin.