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. 15, 2012
Filed:
Oct. 20, 2008
Yukiyoshi Takamura, Kamakura, JP;
Naoto Shiino, Ooi, JP;
Yukiyoshi Takamura, Kamakura, JP;
Naoto Shiino, Ooi, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A system according to the invention reads/writes data by using a memory device performing a wear leveling. A hostreads/writes data from/in a flash memory device. A first protection code BC is added to the end of a logical block for every logical block of 512 bytes. A second protection code FC is added to the head of the logical blocks. The first protection code BC and the second protection code FC are configured to include data for specifying the logical address. When data is read from the flash memory device, the logical address obtained from the first protection code BC is compared to the logical address obtained from the second protection code. When both logical addresses are identical, it is determined that correct data is read.