13.11.4 Internal Voltage Reference

The internal voltage reference will be enabled when needed by the Brown-out Detection, the analog comparator or the Analog-to-Digital Converter (ADC). If these modules are disabled as described in the sections above, the internal voltage reference will be disabled and it will not be consuming power. When turned on again, the user must allow the reference to start-up before the output is used. If the reference is kept on in Sleep mode, the output can be used immediately.