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:
Dec. 10, 2002
Filed:
Mar. 28, 2000
Takamichi Kamiya, Kasugai, JP;
Takehiro Abeta, Anjo, JP;
Denso Corporation, Kariya, JP;
Abstract
An electronic control unit includes a first microprocessor monitoring the operation of a second microprocessor and has a monitoring operation blocking unit for preventing the second microprocessor from being reset by the first microprocessor while the second microprocessor is loading from a memory thereof so that even when a control program is loaded into the monitoring microprocessor before one is loaded into the monitored microprocessor, the control program can be loaded with certainty. Each microprocessor executes a control program stored in the memory, and when a predetermined reloading condition has been established, executes a loading process for receiving load data transmitted thereto from outside into the memory. The microprocessors use the same single communication line to conduct communication with the outside and the electronic control unit further includes a communication operation controlling unit for, when one of the microprocessors is loading, prohibiting the other microprocessors from transmitting data to the communication line. In this way, it is possible to reload a control program and control data into any of the microprocessors without the data being destroyed by data from the other microprocessors.