Nonvolatile semiconductor memory device

Details Nonvolatile semiconductor memory device Nonvolatile semiconductor memory device

2005-09-27

2005-09-27

Phung, Anh (Department: 2824)

Static information storage and retrieval

Floating gate

Particular biasing

C365S185040, C365S201000, C711S164000, C713S152000

Reexamination Certificate

active

06950345

ABSTRACT:
A nonvolatile semiconductor memory device with a function of executing a verify operation for write data that is input from outside includes a memory cell array including memory cells arranged in a matrix, and a password storage area for storing password data, an input buffer that receives data input from outside, a first retaining circuit that retains input password data or write data, which is input to the input buffer, a verify sense amplifier that detects, at a time of the verify operation, the password data that is read out of the password storage area or data that is read out of the memory cell array, and a coincidence determination circuit that determines whether the input password data coincides with the read-out password data, or determines whether the write data coincides with the read-out data.

REFERENCES:
patent: 6731536 (2004-05-01), McClain et al.
patent: 6751716 (2004-06-01), Sumitani et al.
patent: 2003-12688 (2003-05-01), None

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