| 摘要 |
PROBLEM TO BE SOLVED: To provide an electronic control device capable of suppressing increase in power consumption, even when there is a circuit operating in a standby state.SOLUTION: An internal power circuit lowers a battery voltage BATT supplied always from an external side to generate a standby power voltage VOS3. A timer continues to measure an elapse of time in a standby state, after a main relay 3 is turned off and supply of a power voltage +B is interrupted. Measured time data of the timer are saved to a save register during a time measurement operation of the timer. When a stop condition for stopping the time measurement operation of the timer is satisfied, a control circuit stops the operation of the internal power circuit. When the main relay 3 is turned on, the internal power circuit is activated to start its operation again by the control circuit, so that the measured time data saved to the save register are restored to the timer. |
