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. 12, 1995
Filed:
Sep. 28, 1993
Toyohiko Yoshida, Itami, JP;
Yuichi Saito, Itami, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A microprocessor having a test mode wherein a test instruction including an instruction for executing the whole microprogram routine and a step-execution instruction for executing only one microinstruction of an arbitrary address in a micro ROM for easily diagnosing each internal function blocks by independently operating them, and a circuit for changing the content of sequence field of the microinstruction outputted to the microsequencer at executing the step-instruction. The circuit is used for executing the microprogram routine step by step with combining instructions which execute only one microinstruction, or a specified instruction between two continuous microinstructions of a microprogram routine, so that the cause of fault points in the microprocessor can be easily specified.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile