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. 13, 2014
Filed:
Dec. 15, 2009
Applicants:
Hideaki Yamashita, Kyoto, JP;
Takeshi Ootsuka, Hyogo, JP;
Inventors:
Hideaki Yamashita, Kyoto, JP;
Takeshi Ootsuka, Hyogo, JP;
Assignee:
Panasonic Corporation, Osaka, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F 12/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A command analyzerdetermines whether or not a first write command after power-on is issued. A new block reserve determinatordetermines that a new physical block is reserved, in a case where the command analyzerdetermines that first writing command after power-on is issued and the physical block corresponding to a logical address at which a host device requests transmit is in a written state. At this time, the semiconductor memory device writes data to the new physical block. Thereby, data written before power disconnection does not been destroyed.