Electronic control device and vehicle control system

摘要

The present invention provides an electronic control device including a processing unit having a function of shifting to a sleep mode in which the processing unit is adapted to start up from the sleep mode according to occurrence statuses of one or more startup factors, and shift to the sleep mode according to a system power supply voltage.

主权项

1. An electronic control device which is connected to a low-voltage battery that outputs a system power supply voltage and a power supply relay which is interposed on a power supply line connecting the low-voltage battery and a second electronic control device, the electronic control device comprising:
a processing unit that controls the power supply relay; and a power supply monitoring unit that accepts a monitoring voltage from a contact that is disposed between an output of the power supply relay and an input of the second electronic control device, and outputs an output signal indicating a determination result whether or not the monitoring voltage is not more than a threshold value, wherein the processing unit is structured to start up from a sleep mode to turn on the power supply relay according to states of one or more interrupt signals, which causes the system power supply voltage to be supplied to the second electronic control device, and the processing unit starts a sampling from the power supply monitoring unit, and when the monitoring voltage is detected to be not more than the threshold value based on the output signal of the power supply monitoring unit, the processing unit is structured to shift to the sleep mode and stop the sampling from the power supply monitoring unit.