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:
Jul. 03, 2007
Filed:
Jul. 19, 2002
Mitsuru Nakada, Kanagawa, JP;
Mitsuhiko Tomita, Tokyo, JP;
Mitsuru Nakada, Kanagawa, JP;
Mitsuhiko Tomita, Tokyo, JP;
Sony Corporation, , JP;
Abstract
A nonvolatile memory and a data rewriting method of the nonvolatile memory that can readily detect a state of operation at a time of a system failure due to a power failure or the like and quickly and reliably restore the nonvolatile memory to a normal storage state by a simple method. In the nonvolatile memory including a physical block as a storage unit, the physical block having a data area () and a redundant area (), the redundant area () includes: a logical block address storing area () for storing an address of a corresponding logical block; a previously used physical block address storing area () for storing an address of a physical block to be erased; and a status information storing area () for storing status information for distinguishing a state of operation in each stage occurring in performing data rewriting operation on the physical block.