Memory and {HEAD ~ circuit} for accessing data bits in a memory array in {TAIL ~ multi data rate operation} 
Memory and { HEAD ~ circuit } for accessing data bits in a memory array in { TAIL ~ multi data rate operation }
OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL