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 2.5 µs. If an internal
reference is used, the reference start-up time is normally longer than the AC start-up
time. The VREF start-up time is 60 µs at most.