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