{TAIL ~ a pull up unit} which pulls up an output terminal of the data transfer unit in {HEAD ~ response} to an output signal from the first logic unit 
{ TAIL ~ a pull up unit } which pulls up an output terminal of the data transfer unit in { HEAD ~ response } to an output signal from the first logic unit
TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH