Static information storage and retrieval – Floating gate – Data security
Reexamination Certificate
2007-03-06
2007-03-06
Elms, Richard T. (Department: 2824)
Static information storage and retrieval
Floating gate
Data security
C365S185090, C365S200000, C714S766000
Reexamination Certificate
active
10824831
ABSTRACT:
An erroneous operation preventing circuit of an electrically rewritable non-volatile memory device is for setting one or more operational modes of a plurality of operational modes including at least a first reading mode of reading out data from a memory array4,a programming mode, an erasing mode and a second reading mode of reading out data not stored in the memory array4,in accordance with an input control command, and for performing a predetermined process in the set operational modes. The erroneous operation preventing circuit comprises an operational mode enforcing circuit2afor setting the first reading mode regardless of the input of the control command, in a data protection status where the programming mode and the erasing mode are inhibited from being set in accordance with a control signal for protecting predetermined data.
REFERENCES:
patent: 5381369 (1995-01-01), Kikuchi et al.
patent: 6188605 (2001-02-01), Nomura et al.
patent: 2002/0015336 (2002-02-01), Watkins et al.
patent: 09-069066 (1997-03-01), None
patent: 2002-366436 (2002-12-01), None
Elms Richard T.
Morrison & Foerster / LLP
Sharp Kabushiki Kaisha
Wendler Eric J.
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