A two wire dedicated diagnostic data port in an integrated circuit provides {HEAD ~ visibility} for all internal functions of {TAIL ~ the integrated circuit} 
A two wire dedicated diagnostic data port in an integrated circuit provides { HEAD ~ visibility } for all internal functions of { TAIL ~ the integrated circuit }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL