28.4.2 Power Management

The EVSYS can be used to wake up the CPU from all sleep modes (Deep Sleep/BACKUP and Extreme Deep Sleep/OFF Mode), even if the clock used by the EVSYS channel and the EVSYS bus clock are disabled. See Power Management Unit (PMU) from Related Links for details on the different sleep modes.

Although the clock for the EVSYS is stopped, the device still can wake up the EVSYS clock. Some event generators can generate an event when their clocks are stopped. The generic clock for the channel (GCLK_EVSYS_CHANNEL_n) will be restarted if that channel uses a synchronized path or a resynchronized path. It does not need to wake the system from sleep.