Static information storage and retrieval – Floating gate – Data security
Patent
1999-10-19
2000-09-26
Dinh, Son T.
Static information storage and retrieval
Floating gate
Data security
36518511, 36518904, 36523003, G11C 1604
Patent
active
061250554
ABSTRACT:
A simultaneous operation flash memory capable of write protecting predetermined sectors in the simultaneous operation flash memory. The preferred simultaneous operation flash memory includes a plurality of sectors divided into an upper bank and a sliding lower bank. Each bank is associated with a predetermined amount of sectors in the simultaneous operation flash memory. The simultaneous operation flash memory also includes at least one upper address decoder circuit that has a upper sector select line. During operation, each upper address decoder circuit generates a predetermined output signal on the upper sector select line when selected. In addition, the simultaneous operation flash memory includes at least one lower address decoder circuit including a lower address sector select line, wherein each upper address decoder circuit generates a predetermined output signal on the lower sector select line when selected during operation. Finally, at least one write protect CAM is electrically connected with a respective upper sector select line or a respective lower sector select line, wherein said write protect CAM generates a sector protect signal if the write protect CAM is selected by the respective upper sector select line or the respective lower sector select line.
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Kasa Yasushi
Wang Guowei
Advanced Micro Devices , Inc.
Dinh Son T.
Fujitsu Limited
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