18.3 Bidirectional Pins

PPS selections for peripherals with bidirectional signals on a single pin must be made so that the PPS input and PPS output select the same pin. Peripherals that have bidirectional signals include:

EUSART (DT/RXxPPS and TX/CKxPPS pins for synchronous operation)
MSSP (I²C SDA/SSPxDATPPS and SCL/SSPxCLKPPS)

Important: The I²C default inputs, and a limited number of other alternate pins, are I²C and SMBus compatible. Clock and data signals can be routed to any pin, however pins without I²C compatibility will operate at standard TTL/ST logic levels as selected by the INLVL register. See the INLVL register for each port to determine which pins are I²C and SMBus compatible.