DATA PROCESSING SYSTEM, BLOCK ERASING TYPE MEMORY DEVICE AND MEMORY MEDIUM STORING PROGRAM FOR CONTROLLING MEMORY DEVICE

摘要

A data processing system is provided with a flash memory (1) including a plurality of blocks and capable of erasing stored data collectively in units of block and a memory control unit (2) for accessing the flash memory, the memory control unit having a control circuit (21) for formatting the flash memory according to a format information for substantially coinciding each cluster serving as a logical unit of memory region of the flash memory with integer ones of the blocks and a control circuit (23) for determining a size and position of each cluster and carrying out access control for erasing, write-in and reading of data of the flash memory according to the size and position of the determined cluster.