| 摘要 |
PROBLEM TO BE SOLVED: To automatically and efficiently carry out firmware restoration work when a program is damaged by a failure. SOLUTION: The present invention is characterized by that it is provided with a flag A for storing a revision of a firmware update data before a firmware update, a flag B for storing a revision of firmware update data after the firmware update, and a restoration program for determining that the program is damaged when the flags A and B are different and re-updating firmware, and the firmware is restored by the restoration program when the program is damaged due to a failure or the like such as accidental power off during the firmware update. COPYRIGHT: (C)2004,JPO
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