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:
Nov. 16, 1999
Filed:
Feb. 15, 1994
Nobuaki Motoyama, Itami, JP;
Souichi Kobayashi, Itami, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A one-chip microprocessor, in which a built-in cache memory unit 20 has parities, and a cache parity generating & checking unit 21 checks parity of data read from the built-in cache memory unit 20, and when parity error is detected, outputs an internal cache parity error signal 50 to an instruction execution unit 23. By this, the instruction execution unit 23 suspends instruction execution and outputs a processor error signal 37. Accordingly, by checking parity errors of data of built-in memory and inputted address/data, instruction execution are immediately suspended to limit malfunction at least, thereby improving reliability. And by storing kinds of bus operation and errors in a register at the time of error generation, restoring possibility of system level is improved.