23.3.3 Voltage Measurement

The V_DDIOx supply voltage is available as an internal input channel to the ADC. The voltage is divided by ten to allow the use of any internal ADC reference. To measure V_DDIOx/10, the user is recommended to follow these steps:

1. Configure the voltage reference for the ADC
2. Select V_DDIOx/10 as the positive input to the ADC
3. Run a single-ended ADC conversion
4. Calculate the voltage using the following equation:
   $V_{\text{DDIOx}}=\frac{\text{ADC Result}\times V_{\text{REF}}\times 10}{\text{ADC Resolution}}$