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:
Oct. 10, 2006
Filed:
Oct. 26, 2005
Shozo Kawabata, Kasugai, JP;
Mitsuhiro Nagao, Kasugai, JP;
Kenta Kato, Kasugai, JP;
Spansion LLC, Sunnyvale, CA (US);
Abstract
A verify sense amplifier () reads data from a non-volatile memory cell to be rewritten. The readout data is compared to expected data in a comparator circuit (). Upon completion of rewriting, the comparator circuit () outputs a match signal MCH. A selector () outputs a decode signal STR(i) or SWP(i) indicative of a volatile data retaining unit (), in correspondence with the non-volatile memory cell MC to be rewritten. According to a verify instruction signal PGV/ERV, the readout data read by the verify sense amplifier () is stored in the volatile data retaining unit (). Control is performed with a match signal MCH instead of the verify instruction signal PGV/ERV, thereby storing the data in the volatile data retaining unit () upon completion of rewriting. Therefore, there is no need to re-read operational information from the non-volatile storage.