Control buffer 122 receives external control signals through {HEAD ~ a plurality} of control pins, and {TAIL ~ issues} corresponding internal control signals to control circuit 123 
Control buffer 122 receives external control signals through { HEAD ~ a plurality } of control pins , and { TAIL ~ issues } corresponding internal control signals to control circuit 123
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH