Static information storage and retrieval – Read/write circuit – Erase
Patent
1992-10-20
1995-05-23
Popek, Joseph A.
Static information storage and retrieval
Read/write circuit
Erase
365185, 365900, G11C 700
Patent
active
054187524
ABSTRACT:
A system of Flash EEprom memory chips with controlling circuits serves as non-volatile memory such as that provided by magnetic disk drives. Improvements include selective multiple sector erase, in which any combinations of Flash sectors may be erased together. Selective sectors among the selected combination may also be de-selected during the erase operation. Another improvement is the ability to remap and replace defective cells with substitute cells. The remapping is performed automatically as soon as a defective cell is detected. When the number of defects in a Flash sector becomes large, the whole sector is remapped. Yet another improvement is the use of a write cache to reduce the number of writes to the Flash EEprom memory, thereby minimizing the stress to the device from undergoing too many write/erase cycling.
REFERENCES:
patent: 4752871 (1988-06-01), Sparks et al.
patent: 4970692 (1990-11-01), Ali et al.
R. Wilson, "1-Mbit flash memories seek their role in system design", Computer Design, Mar. 1, 1989, pp. 30 and 32.
Harari Eliyahou
Mehrotra Sanjay
Norman Robert D.
Popek Joseph A.
SunDisk Corporation
LandOfFree
Flash EEPROM system with erase sector select does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Flash EEPROM system with erase sector select, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Flash EEPROM system with erase sector select will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2145460