21.3.1 Initialization

The default configuration will enable the respective source when the ADC0, DAC0, or AC is requesting a reference voltage. The default reference voltage is 1.024V but can be configured by writing to the respective Reference Select (REFSEL) bit field in the ADC0 Reference (ADC0REF), DAC0 Reference (DAC0REF), or Analog Comparator (ACREF) register.