13.11.2 Analog Comparator

When entering Idle mode, the analog comparator should be disabled if not used. When entering ADC Noise Reduction mode, the analog comparator should be disabled. In other sleep modes, the analog comparator is automatically disabled. However, if the analog comparator is set up to use the internal voltage reference as input, the analog comparator should be disabled in all sleep modes. Otherwise, the internal voltage reference will be enabled, independent of the sleep mode.