25.5.2 Power Management

The RTC continues to operate in any sleep modes (Standby Sleep, Deep Sleep, Idle) 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 the sleep modes. See Power Management Unit (PMU) from Related Links for details on the different Sleep modes.

The RTCC 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).