Data Sheet

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Atmel | SMART SAM D21 [DATASHEET]
Atmel-42181G–SAM-D21_Datasheet–09/2015
z Bit 0 – SWRST: Software Reset Synchronization Busy
Resetting the SERCOM (CTRLA.SWRST) requires synchronization. When written, the SYNCBUSY.SWRST bit
will be set until synchronization is complete.
Writes to any register while synchronization is on-going will be discarded and an APB error will be generated.
0: SWRST synchronization is not busy.
1: SWRST synchronization is busy.