21.5.2 Power Management

The RTC will continue to operate in any sleep modes where the selected source clock is running. The RTC interrupts can be used to wake up the device from sleep modes. Events connected to the event system can trigger other operations in the system without exiting sleep modes. Refer to the Power Manager for details on the different sleep modes.

The RTC can only be reset by a power on reset (POR) or by setting the Software Reset bit in the Control A register (CTRLA.SWRST=1).