31.3.2.1 Enabling, Disabling, and Resetting

The DAC is enabled by writing a '1' to the ENABLE bit in the Control A register (DACn.CTRLA), and disabled by writing a '0' to this bit.

The OUT output to a pin is enabled by writing the Output Enable bit (OUTEN) in the CTRLA register (DACn.CTRLA).