| 摘要 |
PURPOSE:To set a standard for the reliability of the stored data by writing the checking data into a prescribed storage position when the writing of data is over to a nonvolatile memory and then reading the data out of the memory to check whether the data are coincident with the check data or not. CONSTITUTION:When the writing of data is started, a microcomputer 2 writes the data different from the check data in plural storage positions. Then the microcomputer 2 writes the check data in plural storage positions of a nonvolatile memory 6. In a check state, the microcomputer 2 reads the data out of plural storage positions of a check data storing part of the memory 6. When these data are all coincident with the check data, it is decided that the data are normally written in the memory 6. If the data are not coincident with the check data, the microcomputer 2 decides that the writing of data is interrupted to the memory 6 and then writes the data again into the memory 6. |
