Methods for the management of erase operations in non-volatile memories
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United States of America Patent
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Nov 24, 2009
Grant Date -
May 17, 2007
app pub date -
Nov 14, 2005
filing date -
Nov 14, 2005
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Abstract
The present invention presents a number of improvements for managing erase processes in non-volatile memory. Such memory systems typically manage the memory by logically organize the basic unit of physical erase (erase block) into composite logical groupings (meta-blocks or logical group), where an erase block generally consists of a number of sectors. When an erase command is received, the specified sectors are checked against the memory system's control data. If the specified sectors span any full logical grouping, the full logical groupings can each be treated as a whole and erased according to one process (such as performing a true, physical erase), while other sectors are “logically” erased at the sector level by standard techniques.
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