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. 27, 2004
Filed:
Oct. 11, 2002
Applicant:
Inventor:
Hiroshi Akamatsu, Hyogo, JP;
Assignee:
Renesas Technology Corp., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11C 7/00 ;
U.S. Cl.
CPC ...
G11C 7/00 ;
Abstract
A spare address conversion circuit makes an address assignment to spare sub word lines different from the address assignment to normal sub word lines between a mode of data writing and a mode of data reading. Data are written such that opposite data patterns are stored in spare word lines before and after address conversion. When a multi-selection occurs, there is data collision on the corresponding bit lines, so that the multi-selection can be detected without fail.