For basic operation, follow these steps:
- Configure the desired input pins in
the PORT peripheral.
- Select the positive and negative
input sources by writing the Positive and Negative Input MUX Selection bit fields
(MUXPOS and MUXNEG) in the MUX Control A register (AC.MUXCTRLA).
- Optional: Enable the output to pin by
writing a '1' to the Output Pad Enable bit (OUTEN) in the Control A register
(AC.CTRLA).
- Enable the AC by writing a '1' to the
ENABLE bit in AC.CTRLA.
During the start-up time after enabling the AC, the output of the AC may be invalid.
The start-up time of the AC by itself is at most 2.5µs. If a internal
reference is used, the reference start-up time is normally longer than the AC start-up
time. The VREF start-up time is at most 60µs.