Static information storage and retrieval – Magnetic bubbles – Guide structure
Patent
1993-06-30
1997-01-07
Chan, Eddie P.
Static information storage and retrieval
Magnetic bubbles
Guide structure
395479, 395483, 395490, 36518504, 36518511, 365195, G06F 1214
Patent
active
055926410
ABSTRACT:
A method and device for selectively enabling and disabling write access to flash blocks in a flash memory device. A lock command locks and unlocks a flash block in a flash array containing a plurality of flash blocks. A block data row decoder selects a block data area of the flash block, and a block status row decoder selects a block status area of the flash block. A lock bit in the block status area is programmed to a first logic state if the lock command specifies a lock flash block operation, or to a second logic state if the lock command specifies a release flash block operation. If a write protect input, read from the write protect pin of the flash memory device, indicates that a write lock is enabled and if a block enabled status bit in a block status register corresponding to the block indicates that the block has the write lock, then the lock bit is read and stored into the block enabled status bit in the block status register corresponding to the block. The write protect input is read again from the write protect pin and if the write protect input indicates that the write lock is enabled, and if the block enabled status bit in the block status register corresponding to the block, as updated, indicates that the block has the write lock, then an error is signaled.
REFERENCES:
patent: 4561051 (1985-12-01), Rodman et al.
patent: 4783745 (1988-11-01), Brookner et al.
patent: 5053990 (1991-10-01), Kreifels et al.
patent: 5065364 (1991-11-01), Atwood et al.
patent: 5159672 (1992-10-01), Salmon et al.
patent: 5175837 (1992-12-01), Arnold et al.
patent: 5177745 (1993-01-01), Rozman
patent: 5222046 (1993-06-01), Kreifels et al.
patent: 5224070 (1993-06-01), Fandrich
patent: 5233559 (1993-08-01), Brennan, Jr.
patent: 5245572 (1993-09-01), Kosonocky et al.
patent: 5249158 (1993-09-01), Kynett et al.
patent: 5265059 (1993-11-01), Wells et al.
patent: 5388083 (1995-02-01), Assar et al.
Doyle Scott M.
Durante Richard J.
Fandrich Mickey L.
Fedel Salim B.
Goodell Timothy W.
Bragdon Reginald G.
Chan Eddie P.
Intel Corporation
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