Method for operating a flash memory

Details Method for operating a flash memory Method for operating a flash memory

1994-08-01

1995-12-05

Popek, Joseph A.

Static information storage and retrieval

Read/write circuit

Erase

36518511, 36518529, G11C 700

Patent

active

054735696

ABSTRACT:
A method for operating a Flash memory having a plurality of memory blocks. In a first method, data is written to a memory block having less than the predetermined threshold of memory remaining. Any remaining data is written to a memory block having the largest amount of memory remaining. In a second method, data is written to a memory block having a least amount of memory remaining when an average of the memory used in each block falls below the predetermined threshold. Any remaining data is also written to a memory block having the largest amount of memory remaining. A block erase is performed on a memory block by first copying any data to be saved to a copy block of the Flash memory. Each memory block has an identifying code. An identifying code of the copy block is changed to an identifying code of the memory block. A block erase is then performed on the memory block and the identifying code of the memory block is changed to the identifying code of the copy block.

REFERENCES:
patent: 5341330 (1994-08-01), Wells et al.
patent: 5341339 (1994-08-01), Wells
patent: 5369616 (1994-11-01), Wells et al.
patent: 5388083 (1995-02-01), Assar et al.

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