{HEAD ~ The tenth FF} receives the output signal of the second multiplexer, outputs a write data strobe , and is driven by {TAIL ~ the output signal} of the XOR gate 
is driven by
{ HEAD ~ The tenth FF } receives the output signal of the second multiplexer , outputs a write data strobe , and is driven by { TAIL ~ the output signal } of the XOR gate
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH