{HEAD ~ A serial data transmission unit} which can freely set a holding interval T of {TAIL ~ the final bit} of transmitted data 
{ HEAD ~ A serial data transmission unit } which can freely set a holding interval T of { TAIL ~ the final bit } of transmitted data
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH