The memory controller and the memory access method

A data storage unit (130) temporarily stores the sector number and physical address conversion table in association with an address (133) for each file. If a file open request to ensure that the conversion table memory unit (140) to ensure that the file corresponding to the address translation table (133) with a memory area. File system management unit (110) at a predetermined timing the release of the secured memory area. Further, the file system management unit (110) to ensure the address conversion table memory area (133) are sequentially stored in each recording sector number constituting the one file or a plurality of sectors. Thereafter, the memory control unit (120) acquires a physical address corresponding to each sector number recorded in the address conversion table by searching a memory area of ​​the flash memory, to store each of the acquired physical address corresponding to the record.