Static information storage and retrieval – Floating gate
Reexamination Certificate
2006-10-10
2006-10-10
Le, Vu A. (Department: 2824)
Static information storage and retrieval
Floating gate
C365S189050
Reexamination Certificate
active
07120050
ABSTRACT:
A verify sense amplifier (19) reads data from a non-volatile memory cell to be rewritten. The readout data is compared to expected data in a comparator circuit (21). Upon completion of rewriting, the comparator circuit (21) outputs a match signal MCH. A selector (23) outputs a decode signal STR(i) or SWP(i) indicative of a volatile data retaining unit (25), 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 (19) is stored in the volatile data retaining unit (25). 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 (25) upon completion of rewriting. Therefore, there is no need to re-read operational information from the non-volatile storage.
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Kato Kenta
Kawabata Shozo
Nagao Mitsuhiro
Ingrassia Fisher & Lorenz P.C.
Le Vu A.
Spansion LLC
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