The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 06, 2010
Filed:
Dec. 27, 2007
Koji Hashimoto, Chiyoda-ku, JP;
Shoso Tsunekazu, Chiyoda-ku, JP;
Koji Hashimoto, Chiyoda-ku, JP;
Shoso Tsunekazu, Chiyoda-ku, JP;
Mitsubishi Electric Corporation, Tokyo, JP;
Abstract
First and second on-vehicle electronic control apparatuses which communicate with each other through serial communication interface circuits are fed with powers through an output contact of a power source relay from an on-vehicle battery, an electromagnetic coil of the power source relay is energized through a transistor when a power source switch has been closed, first and second microprocessors are activated upon closure of the output contact, a first watchdog timer generates a self-holding command signal and keeps an operating state of the power source relay when intervals of a watchdog signal which is generated by the first microprocessor are normal, and the self-holding command signal is stopped to deenergize the power source relay, when the first and second on-vehicle electronic control apparatuses have completed their save processing steps in accordance with opening of the power source switch.