| 摘要 |
PROBLEM TO BE SOLVED: To prevent incorrect judgment owing to accidental matching on sum checking in judgment whether data is normally written in a storage device or not. SOLUTION: A specified character string is contained in the end of a main program as a loading completion mark. At the down-load the load completion mark is stored in the specified storage area of a flash memory. When the load completion mark is stored in a load completion mark storage area in the flash memory (S120: YES) and the result of sum checking on the main program area is normal (S140: YES) in judgment whether the main program is precisely stored or not, a system is judged to be normal (S150). |
