SEMICONDUCTOR MEMORY, METHOD FOR CONTROLLING REFRESHMENT OF IT, AND METHOD FOR SETTING MEMORY CELL ARRAY SPECIFIC AREA FOR REALIZING THE CONTROL METHOD

摘要

A semiconductor memory including a memory cell array area divided into areas so as to reduce the average consumption current in the stand-by mode, comprising a specific area setting section electrically connected to the memory cell array area and adapted for setting at least one area selected according to a criterion from the areas as at least one type of specific area, and a refresh control section electrically connected the memory cell array area and adapted to refresh the specific area according to at least one type of specific refresh control signal having a period longer than that of a basic refresh control signal at least in a predetermined mode of the semiconductor memory.