type SpiDrVal: Bitfield<Bits = u32>
type USpiDr: USpiDr<T, Val = Self::SpiDrVal, UReg = Self::USpiDr, SReg = Self::SSpiDr, CReg = Self::CSpiDr>
type SSpiDr: SSpiDr<T, Val = Self::SpiDrVal, UReg = Self::USpiDr, SReg = Self::SSpiDr, CReg = Self::CSpiDr>
type CSpiDr: CSpiDr<T, Val = Self::SpiDrVal, UReg = Self::USpiDr, SReg = Self::SSpiDr, CReg = Self::CSpiDr>