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:
Feb. 12, 2013
Filed:
Nov. 11, 2008
Applicants:
Masahiro Nakanishi, Kyoto, JP;
Tatsuya Adachi, Osaka, JP;
Inventors:
Masahiro Nakanishi, Kyoto, JP;
Tatsuya Adachi, Osaka, JP;
Assignee:
Panasonic Corporation, Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11C 16/04 (2006.01); G06F 13/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
When a write command is issued, new data is written into a free physical block of a nonvolatile memory (). Here, if data of the same logical block has been written already, the block is erased and a recording state is judged by a recording state judgment unit (). A physical block is swapped according to the number of write processes performed. Thus, it is possible to effectively perform a swap without increasing the number of write processes in a particular area, thereby increasing the lifetime of a nonvolatile storage module.