Patent ID: 9006924
Filing Date: 2015-04-14
Classification: B60R,F02D,H02J

Abstract:
1. An electronic control device comprising: an internal power circuit, which is supplied with a first power voltage always from an external side and a second power voltage through a power switch from the external side and generates a third power voltage by lowering the first power voltage; a control circuit, which controls an operation of the internal power circuit; a timer, which is supplied with the third power voltage and measures at least a time period of turn-off of the power switch; and a data memory circuit, which is supplied with the first power voltage and stores data, wherein while the timer performs a time measuring operation after the power switch is turned off, the data memory circuit saves therein a measured time data of the timer, when a stop condition for stopping the time measuring operation of the timer is satisfied, the control circuit stops an operation of the internal power circuit, and when the power switch is turned on, the control circuit starts the operation of the internal power circuit to restore the measured time data saved in the data memory circuit to the timer.