ACCESS CONTROL DEVICE, ACCESS CONTROL METHOD, ACCESS CONTROL PROGRAM, STORAGE MEDIUM, STORAGE DEVICE, AND IMAGE PROCESSING DEVICE

摘要

PPROBLEM TO BE SOLVED: To provide an access control device which assigns an appropriate storage medium to data in accordance with a data-rewriting frequency. PSOLUTION: The access control device includes: a FLASH ROM which memorizes a conversion table for correlating an outside address, an inside address of data in MLC, SLC, or FeRAM, and the number of rewriting times with each other; a determination section 601 which determines whether the number of rewriting times corresponding to an inside address exceeds a predetermined first threshold value or not when an inside address corresponding to an outside address designated for writing is an inside address of MLC or SLC; a transferring section 602 which transfers data stored in the inside addresses having the number of rewriting times exceeding the first threshold value to the inside addresses of SLC or FeRAM respectively; and a table renewal section 603 which renews the conversion table by substituting transfer destination inside addresses for the inside addresses corresponding to the outside addresses of the transferred data. PCOPYRIGHT: (C)2009,JPO&INPIT