| 摘要 |
PROBLEM TO BE SOLVED: To provide a semiconductor memory capable of preventing the malfunction of a refresh-executing circuit in a period when a refresh-clock at the time of supplying power is unstable by stopping a refresh clock. SOLUTION: This semiconductor memory is provided with a refresh-time circuit for generating a refresh-clock, a refresh-executing circuit for executing refresh-operation successively one by one of a plurality of memory cells an object based on a period of a refresh-clock, a refresh-control circuit for stopping transmission of a refresh-clock for the refresh-executing circuit from the refresh- timer circuit in the prescribed period when the period of the refresh-clock is apt to be unstable between the refresh-timer circuit and the refresh-executing circuit. Thereby, the malfunction of the refresh-executing circuit can be prevented.
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