MEMORY SYSTEM WITH IMPROVED RELIABILITY AND WEAR-LEVELING TECHNIQUE THEREOF

摘要

A memory system and a wear-leveling method thereof are provided to improve reliability of a memory device by performing a wear-leveling operation based on ECC(Error Correction Code) event information. A memory system includes a flash memory device(140) and a memory controller(120). The flash memory device has memory units composed of a plurality of memory cells. The memory controller controls the flash memory device. The memory controller performs a wear-leveling operation about the memory units based on deleting event information and ECC event information of each memory unit. The deleting event information includes the number of deleting event of each memory unit. The ECC event information includes error bit values of each memory unit.