11.4.9.3 Multiplexing Digital Input Peripheral

The following conditions are characteristic of a multiplexed digital input peripheral:

• Peripheral does not control the TRISx register. Some peripherals require the pin be configured as an input by setting the corresponding TRISx bit = 1.
• Peripheral input path is independent of I/O input path and uses an input buffer that is dependent on the peripheral.
• PORTx register data input path is not affected and is able to read the pin value.