SEMICONDUCTOR MEMORY DEVICE PREVENTING DATA VARIATION DUE TO ACCUMULATION OF DISTURB, IN WHICH DATA VARIATION DUE TO DISTURB ACCUMULATION IS PREVENTED

摘要

PURPOSE: A semiconductor memory device is provided to prevent data variation due to disturb accumulation, as suppressing the increase of the number of rewriting of a sector. CONSTITUTION: According to a data rewriting device, a logic/physical sector conversion unit(21) performs conversion from a logic sector to a physical sector. A refresh zone detection unit(22) detects one block or a plurality of blocks to be refreshed. A refresh execution unit(23) executes refresh as to a sector included in a refresh zone. And a data updating unit(24) performs data updating of a target sector.