{HEAD ~ The inactive signal} on {TAIL ~ terminal Q} causes AND gate 612 to mask the clock signal and so operation of diagnostic data port 100 is suspended until DSP 110 again writes to SR flip flop 631 
{ HEAD ~ The inactive signal } on { TAIL ~ terminal Q } causes AND gate 612 to mask the clock signal and so operation of diagnostic data port 100 is suspended until DSP 110 again writes to SR flip flop 631
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH