Dynamic SLC/MLC blocks allocations for non-volatile memory
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United States of America Patent
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Mar 4, 2014
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app pub date -
Mar 18, 2013
filing date -
Nov 12, 2008
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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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