pub type W = W<SrsSpec>;
Register SRS writer
SRS
struct W { /* private fields */ }
Bits 0:1 - Period/One match Service request selector
Bits 2:3 - Compare match Service request selector
Bits 8:9 - Event 0 Service request selector
Bits 10:11 - Event 1 Service request selector
Bits 12:13 - Event 2 Service request selector