| 摘要 |
PURPOSE: To detect correct parameters even if the power source of the device is made off on the way of setting parameters and to prevent a malfunction of the device. CONSTITUTION: The CPU 1 controls an EEPROM 3 in compliance with the program in a ROM 4 by using the EEPROM 3 as an exclusive storing means as follows: the same data is written into three places of the EEPROM 3 in the same order every time, and when all data read from these three places of the storing means is different from each other, the data read from the place written at the first time in the order of writing is regarded as the true one. |
