pub type DcmsbW<'a, REG> = BitWriter<'a, REG, Dcmsb>;
Field DCMSB writer - Double Clock for the MSB Conversion
DCMSB
struct DcmsbW<'a, REG> { /* private fields */ }
1 clock cycles for the MSB (standard)
2 clock cycles for the MSB (fADCI > 20 MHz)