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:
Sep. 13, 2005
Filed:
May. 03, 2004
Applicants:
Koichi Mizugaki, Suwa, JP;
Eitaro Otsuka, Fujimi-machi, JP;
Inventors:
Koichi Mizugaki, Suwa, JP;
Eitaro Otsuka, Fujimi-machi, JP;
Assignee:
Seiko Epson Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11C007/00 ;
U.S. Cl.
CPC ...
Abstract
In the semiconductor memory device of the invention, even in the case of generation of a write access request or a refresh request in advance, an access control module preferentially executes a read access operation in response to a read access request generated by a change of an external access timing signal to an inactive level while a write enable signal supplied from an external device is at an inactive level. This arrangement desirably eliminates the long rate restriction of the semiconductor memory device.