pub type AFSEL0_W<'a, const O: u8> = FieldWriter<'a, u32, AFRL_SPEC, u8, AFSEL0_A, 4, O>;
Field AFSEL0 writer - Alternate function selection for port x bit y (y = 0..7)
AFSEL0
AF0
AF1
AF2
AF3
AF4
AF5
AF6
AF7