| 摘要 |
PROBLEM TO BE SOLVED: To reduce the frequency in writing to a nonvolatile memory (NOR-Flash-ROM) while allowing continuation of processing regardless of the occurrence of power interruption, when updating software. SOLUTION: On the assumption that software comprises a plurality of sections, a new version generation part 102 generates a new version software image 113 of one section from difference data 111 and an old version software image 112 on a nonvolatile memory 122. A write processing part 103 writes the new version software image 113 into a spare section on the nonvolatile memory 122 and takes a section wherein the old version software image 112 is written, as a spare section and updates information indicating sections wherein the old version software image 112 and the new version software image 113 are written, on the nonvolatile memory 122. Upon restoration from power interruption, a restart processing part 104 uses the information to restart processing. COPYRIGHT: (C)2009,JPO&INPIT
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