US Patent 7451025 Test mode circuit and reset control method therefor

Patent 7451025 was granted and assigned to Denso on November, 2008 by the United States Patent and Trademark Office.

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Is a

Patent

Patent attributes

Current Assignee

Denso

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

74510250

Patent Inventor Names

Nobutomo Takagi0

Akio Kojima0

Date of Patent

November 11, 2008

Patent Application Number

112881700

Date Filed

November 29, 2005

Patent Primary Examiner

‌

Tuan C To

Patent abstract

A power control circuit is provided in a vehicle control ECU mounted in a vehicle. The control circuit, when making a shift to a test mode by a test mode circuit, closes a relay to supply a power voltage from a battery to a power line in the similar manner as an ignition main switch is turned on. A logic circuit section of the test mode circuit is reset by an OR logic of a set level of a test terminal and a level of the power line.