3.4 Configurable DIO Pins

The digital IO pins (DIO) are pins which can be configured to enable additional features. The available options are summarized in the table below and can be selected in the Pad Control register. The default configuration of each pin is indicated with bold text. All of the default configurations permit unused pins to be wired directly to ground.

Note:

In order to use any functions that can be selected over these pins, the function must be configured in other registers. See the appropriate section for the desired function for additional details.

Table 3-9. Configurable Pin Functions
Pin NameDirectionDescription
DIOA0InputEvent Capture
OutputEvent Generator 0
DIOA1InputEvent Capture
OutputEvent Generator 1
DIOA2InputACMA or Event Capture
OutputEvent Generator 2
DIOA3InputEvent Capture
OutputEvent Generator 3
DIOA4InputReserved for Microchip test use
OutputOne Pulse-per-second Signal
OutputEvent Generator 2
OutputEvent Generator 3
DIOB0InputSynchronization Reference Clock
OutputReference Clock Out