| 摘要 |
<p>PROBLEM TO BE SOLVED: To enable a non-volatile memory to secure data surely without performing main relay control. SOLUTION: In a step 100, +B voltage and +BB voltage are inputted to a microcomputer 5. In a step 110, difference between +BB voltage and +B voltage (deviation) is obtained, and it is discriminated whether or not this deviation is the prescribed value Vo or more. In a step 120, a elapsed time(t) after decrease of only +B voltage is detected is measured. In a step 130, it is discriminated whether or not the elapsed time(t) is the prescribed discrimination time or more. In a step 14, data stored in a RAM 5, for example, data of running distance is rewritten in an EEPROM 11.</p> |
