6.6 Peripheral Multiplexing

Many pins also support one or more peripheral modules. When configured to operate with a peripheral, a pin may not be used for general input or output. In many cases, a pin must still be configured for input or output, although some peripherals override the TRISx configuration. The typical Multiplexed Port Structure Block Diagram illustrates how ports are shared with other peripherals and the associated I/O pin to which they are connected. See Typical Multiplexed Port Structure Block Diagram in Block Diagram from Related Links. Multiple peripheral functions may be multiplexed on each I/O pin. The priority of the peripheral function depends on the order of the pin descriptions. See Function Priority for Device Pins from Related Links.