Erasing physical memory blocks of non-volatile memory
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United States of America Patent
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Nov 24, 2015
Grant Date -
May 15, 2014
app pub date -
Jan 20, 2014
filing date -
Nov 12, 2008
priority date (Note) -
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Abstract
Apparatus and methods are disclosed, such as those that provide dynamic block allocations in NAND flash memory between single-level cells (SLC) and multi-level cells (MLC) based on characteristics. In one embodiment, a memory controller dynamically switches between programming and/or reprogramming blocks between SLC mode and MLC mode based on the amount of memory available for use. When memory usage is low, SLC mode is used. When memory usage is high, MLC mode is used. Dynamic block allocation allows a memory controller to obtain the performance and reliability benefits of SLC mode while retaining the space saving benefits of MLC mode.
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