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:
Jan. 01, 2008
Filed:
Dec. 27, 2004
Naoki Mukaida, Tokyo, JP;
Naoki Mukaida, Tokyo, JP;
TDK Corporation, , JP;
Abstract
There is disclosed a controller included in a flash memory system attachable to a memory interface of a host system. If a block in which new data is written and a block in which old data is written are present simultaneously, the controller determines in which block the newest data is written, based on version identifier stored in a redundant area of a flash memory. Specifically, the controller has an access control function for controlling access to the flash memory, an address managing function for managing correspondence between a logical block address supplied from the host system and a physical block address in the flash memory, a version identifier setting function for writing version identifier in the redundant area of the flash memory, and a version identifying function for identifying a block in which newest data corresponding to a same logical block address is written based on the version identifier.