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:
Oct. 01, 1991
Filed:
Aug. 14, 1989
Masashi Tsubota, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
A microprocessor according to the present invention is established in either data processing or monitoring mode of operation, and an address code and a data code produced by itself in the monitoring mode of operation are compared with corresponding address and data codes supplied from another microprocessor in the data processing mode of operation so as to decide whether or not aforementioned another microprocessor performs without any troubles, wherein address and data comparator units of the microprocessor respectively produce an address matching signal and a data matching signals upon respective coincidences between the address and data codes and the corresponding address and data codes, however, a delay unit retards the address matching signal by a predetermined time period in a pipeline bus cycle so as to match the address matching signal with the data matching signal.