Datasheet

24.8.1 Control
Name: CTRL
Offset: 0x00
Reset: 0x00
Property: Write-Protected
Bit 7 6 5 4 3 2 1 0
GCLKREQ SWRST
Access
R/W W
Reset 0 0
Bit 4 – GCLKREQ Generic Clock Requests
This bit is used to determine whether the generic clocks used for the different channels should be on all
the time or only when an event needs the generic clock. Events propagated through asynchronous paths
will not need a generic clock.
Value Description
0
Generic clock is requested and turned on only if an event is detected.
1
Generic clock for a channel is always on.
Bit 0 – SWRST Software Reset
Writing a zero to this bit has no effect.
Writing a one to this bit resets all registers in the EVSYS to their initial state.
Writing a one to CTRL.SWRST will always take precedence, meaning that all other writes in the same
write-operation will be discarded.
Note: Before applying a Software Reset it is recommended to disable the event generators.
SAM D21 Family
EVSYS – Event System
© 2018 Microchip Technology Inc.
Datasheet Complete
DS40001882D-page 446