| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve the performance of an information processor by preparing a memory area for backing up data which may disappear due to power OFF or the like in rewriting of a program or the like stored in a flash memory without using a memory or the like built in the processor as a memory area suited to a compact device. <P>SOLUTION: A program (a pointer to rewriting data, constitutional information of respective sectors of a flash memory and indicated data in a data rewriting range) necessary for rewriting of the flash memory 4 and a backup area for sector data including data which are not required to be rewritten in rewriting operation are prepared in a recording medium 8. In the case of erasing each sector at the time of rewriting processing, the rewriting-unnecessary data are backed up in the recording medium 8 so that restoring processing can be attained by the data stored in the recording medium 8 after interruption even when a power supply is turned off. An SD card or the like is used for the recording medium 8 so as to correspond to a compact portable information terminal or the like. <P>COPYRIGHT: (C)2004,JPO |
