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