| 摘要 |
PROBLEM TO BE SOLVED: To improve the reliability of data written/read out in/from a non- volatile storage means, to effectively utilize a data area of the non-volatile storage means and to extend the life of also a non-volatile storage means such as an EEPROM limiting its writing frequency by reducing the writing frequency. SOLUTION: In the case of storing control data in a non-volatile storage means, a storing address and a sum code are combined, added to control data and stored. Thereby address abnormality or data abnormality can be surely discriminated at the time of reading out data, and since it is unnecessary for storing one data in plural addresses, writing frequency can be reduced. |
