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:
May. 06, 2014
Filed:
Jul. 20, 2012
Applicants:
Ho-yin Chen, Hsinchu County, TW;
Shi-huei Liu, Hsinchu County, TW;
Inventors:
Ho-Yin Chen, Hsinchu County, TW;
Shi-Huei Liu, Hsinchu County, TW;
Assignee:
Etron Technology, Inc., Hsinchu, TW;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G11C 7/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A plurality of refresh requests are generated at a predetermined period shorter than the longest time during which a PSRAM is able to retain a data without being refreshed. For two consecutive first and second refresh requests, the second refresh request is ignored if the interval between the first and the second refresh requests is not larger than a predetermined duration. The first refresh request is delayed if the first refresh request conflicts with an external command of the PSRAM.