To operate the DAC, the following steps are required:
- 1.Select the DAC reference voltage in the
Voltage Reference (VREF) peripheral by writing the appropriate Reference Selection
bits.
- 2.Configure the further usage of the DAC
output:
- Configure an internal peripheral
to use the DAC output. Refer to the documentation of the respective
peripherals.
- Enable the output to a pin by
writing a ‘
1
’ to the Output Buffer Enable (OUTEN) bit. The input
for the DAC pin must be disabled in the Port peripheral (ISC = INPUT_DISABLE in
PORTx.PINCTRLn).
- 3.Write an initial digital value to the
Data (DACn.DATA) register.
- 4.Enable the DAC by writing a
‘
1
’ to the ENABLE bit in the Control A (DACn.CTRLA) register.