1.2.2 Internal Inputs
Two internal analog signals can be selected as input and measured by the ADC:
- Temperature sensor
- Bandgap voltage
The voltage output from an internal temperature reference can be measured with the ADC, and the voltage output will give an ADC result presenting the current temperature in the microcontroller.
The bandgap voltage is an accurate voltage reference inside the microcontroller that is the source for other internal voltage references.