type SpiSrVal: Bitfield<Bits = u32>
type USpiSr: USpiSr<T, Val = Self::SpiSrVal, UReg = Self::USpiSr, SReg = Self::SSpiSr, CReg = Self::CSpiSr>
type SSpiSr: SSpiSr<T, Val = Self::SpiSrVal, UReg = Self::USpiSr, SReg = Self::SSpiSr, CReg = Self::CSpiSr>
type CSpiSr: CSpiSr<T, Val = Self::SpiSrVal, UReg = Self::USpiSr, SReg = Self::SSpiSr, CReg = Self::CSpiSr>