| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve recording speed and prevent the mismatching of management information and recording the information of user data even in the event of unexpected power interruption by an accident or the like, or at the time of the insertion and drawing of a memory card during recording. <P>SOLUTION: The cache method of a cache memory for recording the system management information of an FAT or the like in a first flash memory with a small deletion block size and recording user data in a second flash memory with a large deletion block size comprises setting different cache memories and data retention times to first and second flash memories, respectively, and recording, when recording data stored in one cache memory reach a deletion block size within the data retention time, or the elapsed time after writing recording data to the cache memory first pass the data retention time, the recording data stored in the cache memory are recorded in the corresponding first or second flash memory. <P>COPYRIGHT: (C)2009,JPO&INPIT |
