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:
Jan. 17, 2012
Filed:
Oct. 18, 2007
Applicants:
Kota Hara, Kawasaki, JP;
Katsuhiro Mori, Kawasaki, JP;
Inventors:
Kota Hara, Kawasaki, JP;
Katsuhiro Mori, Kawasaki, JP;
Assignee:
Fujitsu Semiconductor Limited, Yokohama, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11C 7/00 (2006.01); G11C 8/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
In a semiconductor memory device which uses a same pad for an address input and data input/output, and has an input circuit and data output circuit connected to the pad, an output of the data output circuit is turned to a high impedance state in accordance with a chip enable signal, output enable signal, and address capture signal, at a stand-by time, output disable time, and address capture period, and thereby, it becomes possible to start an internal read operation even before the address capture period is finished, and a high-speed operation becomes possible.