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 PPS Input Selection Table below).

Important: The notation “xxx” in the generic register name is a place holder for the peripheral identifier. For example, xxx = T0CKI for the T0CKIPPS register.

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.

Table 18-1. PPS Input Selection Table
Input Signal	PPS Input Selection Register	Default Pin Location
Input Signal	PPS Input Selection Register	PIC16F15213/14	PIC16F15223/24	PIC16F15243/44
INT	INTPPS	RA2	RA2	RA2
T0CKI	T0CKIPPS	RA2	RA2	RA2
T1CKI	T1CKIPPS	RA5	RA5	RA5
T1G	T1GPPS	RA4	RA4	RA4
T2IN	T2INPPS	RA5	RA5	RA5
CCP1	CCP1PPS	RA5	RC5	RC5
CCP2	CCP2PPS	RA5	RC3	RC3
SCL1/SCK1	SSP1CLKPPS⁽¹⁾	RA1	RC0	RB4
SDA1/SDI1	SSP1DATPPS⁽¹⁾	RA2	RC1	RB6
SS1	SS1PPS	RA3	RC3	RC6
RX1/DT1	RX1PPS⁽¹⁾	RA1	RC5	RB5
TX1/CK1	TX1PPS⁽¹⁾	RA0	RC4	RB7
ADACT	ADACTPPS	RA5	RC2	RC2

Note:

Bidirectional pin. The corresponding output must select the same pin.