Nonvolatile semiconductor memory for management of a number...

Details Nonvolatile semiconductor memory for management of a number... Nonvolatile semiconductor memory for management of a number...

2006-02-28

2006-02-28

Phung, Anh (Department: 2824)

Static information storage and retrieval

Floating gate

Particular biasing

C365S185110, C365S185120

Reexamination Certificate

active

07006383

ABSTRACT:
A block comprises physical addresses0, 1, 2, 3. In an initial state, all the physical addresses0, 1, 2, 3are in an erase state. When data LA0, LA1, LA2, LA3are written in the physical addresses0, 1, 2, 3, count values are “1”, respectively. In this manner, a write/erase operation is performed by a page (physical address) unit, and the count value of the physical address in which the data has been renewed is renewed. Finally, when a total of the count values in the block reaches an allowable value 32, refresh is performed, and states of memory cells in the block are initialized.

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