| 摘要 |
PROBLEM TO BE SOLVED: To reduce power consumption at the time of stand-by by providing a comparator, driving circuit, a pulse generator, and the like, and inactivating a nonselect signal automatically after burst read/write operation thereby controlling a current circuit leading to redundant decoding. SOLUTION: A pulse signal CYC4B from a pulse generator 20 in a redundant decoding circuit 200 has a low level at the time of starting normal read/write operation and goes high level at the end of normal read/write operation. The pulse signal CYC4B is activated to low state only during normal read/write operation and inactivated automatically upon elapsing a sufficiently long time for executing the read/write operation. The pulse signal CYC4B is inactivated when a semiconductor memory having the redundant decoding circuit 200 makes a transition to stop mode. Consequently, generation of current path is prevented surely in stop mode.
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