29.3.1 Initialization

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 referance is used, the referance start-up time is normally longer than the AC startup time. The VREF startup time is at most 60 µs.