SEMICONDUCTOR STORAGE

摘要

PROBLEM TO BE SOLVED: To provide a semiconductor storage having its performance compensation function. SOLUTION: This semiconductor storage is provided with a step-down voltage generation circuit which drops the power voltage supplied from an external terminal and generates the operating voltage of a memory circuit. Then the voltage of the step-down voltage generation circuit is heightened in an allowable range of voltage of the memory circuit when the detected operating speed of the memory circuit is lower than a desired level.