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