wherein the accumulation module increases a count responsive to the eq up signal being in the second state and the eq dn signal being in the first state, and decreases the count responsive to {HEAD ~ the eq up signal} being in {TAIL ~ the first state} and the eq dn signal being in the second state; and 
wherein the accumulation module increases a count responsive to the eq up signal being in the second state and the eq dn signal being in the first state , and decreases the count responsive to { HEAD ~ the eq up signal } being in { TAIL ~ the first state } and the eq dn signal being in the second state ; and
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 OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH