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:
Oct. 21, 2003
Filed:
May. 01, 2002
Applicant:
Inventors:
Yukiko Maruyama, Hyogo, JP;
Seiji Sawada, Hyogo, JP;
Assignee:
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11C 8/00 ;
U.S. Cl.
CPC ...
G11C 8/00 ;
Abstract
This DDR SDRAM, in the normal operation mode, performs a writing operation having a writing latency and, in the testing mode, performs a writing operation without having a writing latency by receiving a data strobe signal and a data signal one clock cycle before a writing command. Therefore, the testing time is short even if the test is carried out at a low frequency.