Selective operation of a multi-state non-volatile memory system in a binary mode
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United States of America Patent
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Jun 10, 2008
Grant Date -
May 17, 2007
app pub date -
Jan 3, 2007
filing date -
Sep 17, 2001
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Abstract
A flash non-volatile memory system that normally operates its memory cells in multiple storage states is provided with the ability to operate some selected or all of its memory cell blocks in two states instead. The two states are selected to be the furthest separated of the multiple states, thereby providing an increased margin during two state operation. This allows faster programming and a longer operational life of the memory cells being operated in two states when it is more desirable to have these advantages than the increased density of data storage that multi-state operation provides.
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