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:
Nov. 11, 2003
Filed:
Mar. 28, 2003
Yoshimasa Yoshimura, Hyogo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A flash memory includes a user block for storage of user data, an alternate block reserved for substitution, a conversion table for storage of a physical address of the user block corresponding to a logical address, and an alternate table for storage of a physical address of the alternate block. A controller refers to the conversion table for writing the user data to a page within the user block. If the relevant page has data already written therein, the controller refers to the alternate table and writes the user data to a page within the alternate block to use it as a new user block, and switches the original user block to an alternate block. This permits rapid rewriting of the user data.