NON−VOLATILE MEMORY CONTROL METHOD - MATSUSHITA ELECTRIC IND CO LTD

Title:

NON−VOLATILE MEMORY CONTROL METHOD

Document Type and Number:

WIPO Patent Application WO/2003/003219

Kind Code:

A1

Abstract:

A non−volatile memory control method free of problem that data which the operator has tried to erase is not actually erased or data which the operator has tried to write is erased even when a storage device power cut off or a forced interrupt by a reset command or the like is caused while a block is overwritten. When data is written to the last page of a block, a block data validating flag arranged in the redundant area of the last page of the block is made 0 (valid), so as to validate the block. Furthermore, a new&sol old decision counter is provided, so that data is protected even when the aforementioned solving means cannot cope with.

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Inventors:

TAKEUCHI AKIO (JP)
KOGITA SHIGEKAZU (JP)
IWATA KAZUYA (JP)

Application Number:

PCT/JP2002/006313

Publication Date:

January 09, 2003

Filing Date:

June 24, 2002

Export Citation:

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Assignee:

MATSUSHITA ELECTRIC IND CO LTD (JP)
TAKEUCHI AKIO (JP)
KOGITA SHIGEKAZU (JP)
IWATA KAZUYA (JP)

International Classes:

G06F12/16; G06F12/00; G11C16/02; G11C16/10; (IPC1-7): G06F12/16; G11C16/02

Foreign References:

JPH05216780A	1993-08-27
JP2000330850A	2000-11-30

Other References: