pub type PID_W<'a> = FieldWriterSafe<'a, u32, HC6_TSIZ_SPEC, u8, PID_A, 2, 29>;
Field PID writer - Packet ID
PID
DATA0 PID.
DATA2 PID.
DATA1 PID.
MDATA (non-control) / SETUP (control) PID.