Nonvolatile memory system, semiconductor memory, and writing met

Details Nonvolatile memory system, semiconductor memory, and writing met Nonvolatile memory system, semiconductor memory, and writing met

1999-06-29

2000-02-08

Nelms, David

Static information storage and retrieval

Floating gate

Particular biasing

36518522, 36518528, 36518529, G11C 1604

Patent

active

060234253

ABSTRACT:
A nonvolatile semiconductor memory recovers variation in the threshold of a memory cell due to disturbance related to a word line. The nonvolatile memory continuously performs many writing operations without carrying out single-sector erasing after each writing operation, performing the additional writing operations quicker than the usual writing operation, and lightening the burden imposed on software for use in additional writing. The data stored in a designated sector is read out before being saved in a register, and the selected sector is subjected to single-sector erasing when a predetermined command is given. Then write expected value data is formed from the saved data and data to be additionally written, completing the writing operation.

REFERENCES:
patent: 5327383 (1994-07-01), Merchant et al.
patent: 5347489 (1994-09-01), Merchant et al.
patent: 5509134 (1996-04-01), Fandrich et al.

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