| 摘要 |
PROBLEM TO BE SOLVED: To prevent start-up failure even when power interruption occurs during writing a program.SOLUTION: In writing a plurality of update programs A(new) to D(new) on a nonvolatile memory 10, a processor writes update start-up programs (program A(new), program B(new)) first, while leaving existing start-up programs (program A (old), program B(old)) and header information (old) as it is, and writes update header information (new), then writes update execution processing programs (program C(new), program D(new)).SELECTED DRAWING: Figure 2 |
