pub type CKO_W<'a, const O: u8> = FieldWriter<'a, u32, RCMR_SPEC, u8, CKO_A, 3, O>;
Field CKO writer - Receive Clock Output Mode Selection
CKO
None, RK pin is an input
Continuous Receive Clock, RK pin is an output
Receive Clock only during data transfers, RK pin is an output