MEMORY SYSTEM AND REFRESH METHOD THEREOF

摘要

PURPOSE: A memory system and refresh method thereof are provided to secure the integrity of stored data by providing a refresh operation to a user. CONSTITUTION: A memory apparatus(130) includes memory blocks. A memory control unit(120) controls the refresh operation of the memory apparatus. The memory control unit groups the memory blocks included in the memory apparatus. The memory groups are refreshed according to a predetermined sequence. The memory control unit includes a refresh register(122) which stores the address of a final refresh group and the refresh sequence and a refresh management module(121) which determines the refresh sequence of the memory groups.