| 摘要 |
PROBLEM TO BE SOLVED: To provide a memory controller capable of improving rewriting efficiency, a flash memory system comprising the memory controller, and a control method of flash memory. SOLUTION: In this flash memory system 1, a plurality of pages belonging to the same block in the flash memory 2 are divided into a plurality of sub-blocks having continuous physical page addresses, and the same sub-block number is determined on a redundancy area of the page belonging to the same sub-block. User data given from a host system 4 side are stored in order of logical page addresses in a user area of the page on which the same sub-block number is determined. The page in the block is divided into a plurality of sub-blocks, and a storing order is changed by a unit of each group, thus the flash memory system 1 can be improved in its rewriting efficiency. COPYRIGHT: (C)2006,JPO&NCIPI
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