FLASH MEMORY ARRAY WITH INTERNAL REFRESH

FLASH MEMORY ARRAY WITH INTERNAL REFRESH

In a flash memory array, an internal refresh periodically rewrites the information stored in each of the rows of memory cells in a flash memory. The flash memory array includes a refresh pointer bitline that indicates the row to be refreshed. In a first embodiment of the present invention, the inter...

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Hauptverfasser: SCHUMANN, STEVE, GUPTA, ANIL
Format: Patent
Sprache:eng ; fre ; ger
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INFORMATION STORAGE
PHYSICS
STATIC STORES
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GUPTA, ANIL
description In a flash memory array, an internal refresh periodically rewrites the information stored in each of the rows of memory cells in a flash memory. The flash memory array includes a refresh pointer bitline that indicates the row to be refreshed. In a first embodiment of the present invention, the internal refresh is performed automatically after every user erase/program cycle. In second and third embodiments, the user of the of the flash memory array selects when the internal refresh is performed, but the address of the row to be refreshed is supplied internally. In each of the three the embodiments, the internal refresh includes the four operations of SCAN, REFRESH ERASE, REFRESH PROGRAM, and INCREMENT.
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The flash memory array includes a refresh pointer bitline that indicates the row to be refreshed. In a first embodiment of the present invention, the internal refresh is performed automatically after every user erase/program cycle. In second and third embodiments, the user of the of the flash memory array selects when the internal refresh is performed, but the address of the row to be refreshed is supplied internally. 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subjects INFORMATION STORAGE
PHYSICS
STATIC STORES
title FLASH MEMORY ARRAY WITH INTERNAL REFRESH
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