公开(公告)号：US11726853B2

公开(公告)日：2023-08-15

申请号：US17604968

申请日：2020-04-03

Applicant: Hitachi Astemo, Ltd.

Inventor： Qixian Quan

IPC: G06F11/07

CPC classification number: G06F11/0757 ,  G06F11/079

Abstract: Provided is an electronic control unit capable of performing fault diagnosis of a watchdog timer circuit without delaying start of typical processing of a computer. A microcomputer termination processing unit 200 stops outputting a pulse to a watchdog timer circuit 101 in response to execution of termination processing of a microcomputer 100. When a reset signal is not output from the watchdog timer circuit 101 even when a predetermined time has elapsed since the stop of the output of the pulse, a watchdog timer circuit fault diagnosis unit 201 writes abnormality information indicating that an abnormality has occurred in the watchdog timer circuit 101 into the nonvolatile memory 102.