The behavior in sleep mode is depending on the clock source and the Run In
Standby bit in the Control A register (CTRLA.RUNSTDBY):
- Internal clocking, CTRLA.RUNSTDBY=1:
GCLK_SERCOMx_CORE can be enabled in all sleep modes. Any interrupt can wake up the
device.
- External clocking, CTRLA.RUNSTDBY=1:
The Receive Start and the Receive
Complete interrupt(s) can wake up the device.
- Internal clocking, CTRLA.RUNSTDBY=0:
Internal clock will be disabled, after any ongoing transfer was completed. The Receive Start
and the Receive Complete interrupt(s) can wake up the device.
- External clocking, CTRLA.RUNSTDBY=0:
External clock will be disconnected, after any ongoing transfer was completed. All
reception will be dropped.