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:
Apr. 18, 1995
Filed:
Jun. 25, 1992
Applicant:
Inventors:
Hiroshi Ikeda, Yokohama, JP;
Akito Yamamoto, Yokohama, JP;
Assignee:
Nissan Motor Co., Ltd., Yokohama, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F / ;
U.S. Cl.
CPC ...
395575 ; 371 161 ; 371 163 ;
Abstract
A circuit and method for detecting a failure in a microcomputer are disclosed in which a watch-dog timer monitors an internal state of the microcomputer at an internal node representing the internal state and an error detection signal used to inform the failure of the microcomputer is output when a particular internal state to be generated on the internal node within a predetermined period of time. Particularly, in a preferred embodiment where the internal node is an output portion of a microprogram memory, microinstructions are monitored which serves as control signals used within or externally to the microcomputer.