{HEAD ~ An internal signal} or signals are written to {TAIL ~ a serially connected memory} in the dedicated diagnostic data port 
{ HEAD ~ An internal signal } or signals are written to { TAIL ~ a serially connected memory } in the dedicated diagnostic data port
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH