MEMORY DEVICE AND METHOD OF WEAR LEVELING

摘要

PURPOSE: A memory device including a controller selecting a memory cell and a wear leveling method are provided to improve the durability of the memory cell by operating a wear leveling based on an elapsed time after the memory cell is erased. CONSTITUTION: A memory cell array(110) comprises a first memory cell and a second memory cell. A control unit(120) selects one of the first memory cell or the second memory cell. The programming unit(130) saves a data to the memory cell. The control unit generates a first parameter based on an elapsed time after the first memory cell is erased and the number of times which the first memory cell is erased. The control unit generates a second parameter based on an elapsed time after the second memory cell is erased and the number of times which the second memory cell is erased.