A limiting circuit is constituted by a clamp circuit which limits a potential of {HEAD ~ a write word line} to {TAIL ~ a fixed value} or a lower value 
A limiting circuit is constituted by a clamp circuit which limits a potential of { HEAD ~ a write word line } to { TAIL ~ a fixed value } or a lower value
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH