21.3.1 Initialization
The default configuration will enable the respective source when the
ADC0, DAC0, or any of the ACs are 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 Comparators
(ACREF) registers.
Note: Changing the voltage reference for one
peripheral may cause noise that affects other peripherals dependent on the same reference.
Disable these peripherals during the reference change to prevent this.