39.5.12.2 Single-Shot Measurement during Sleep

For low-power operation, event-triggered measurements can be performed during sleep modes. When the event occurs, the CRU will start GCLK_AC. The comparator is enabled and, after the start-up time has passed, a comparison is done, with filtering if desired, and the appropriate peripheral events and interrupts are also generated as shown in the following figure. The comparator and GCLK_AC are, then, disabled again automatically unless configured to wake the system from sleep. Filtering is allowed with this configuration.