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. 14, 2015
Filed:
Feb. 18, 2011
Applicant:
Ryoya Ichioka, Tokyo, JP;
Inventor:
Ryoya Ichioka, Tokyo, JP;
Assignee:
Mitsubishi Electric Corporation, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
G11C 29/00 (2006.01); G06F 11/26 (2006.01); G11C 29/04 (2006.01); G11C 29/10 (2006.01); G11C 29/56 (2006.01);
U.S. Cl.
CPC ...
G06F 11/26 (2013.01); G11C 29/04 (2013.01); G11C 2229/00 (2013.01); G11C 29/00 (2013.01); G11C 29/10 (2013.01); G11C 29/56 (2013.01);
Abstract
A RAM to be diagnosed is divided into n (n being an integer of 3 or greater) pieces of base regions. In an idle time of periodic processing performed in a system in which the RAM is incorporated, two base regions are selected from the divided base regions, and the selected two base regions are diagnosed using a diagnostic method capable of detecting a coupling fault. Thereafter, in an idle time of the periodic processing, operations to select an unselected pair of base regions and diagnose the selected pair are repeated, so as to diagnose all combinations of pairs.