Non-volatile memory with multi-gear control using on-chip folding of data
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United States of America Patent
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Jun 18, 2013
Grant Date -
Jun 23, 2011
app pub date -
Dec 18, 2009
filing date -
Dec 18, 2009
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Abstract
A memory system and methods of its operation are presented. The memory system includes a controller and a non-volatile memory circuit, where the non-volatile memory circuit has a first section, where data is stored in a binary format, and a second section, where data is stored in a multi-state format. The memory system receives data from the host and performs a binary write operation of the received data to the first section of the non-volatile memory circuit. The memory system subsequently folds portions of the data from the first section of the non-volatile memory to the second section of the non-volatile memory, wherein a folding operation includes reading the portions of the data from the first section rewriting it into the second section of the non-volatile memory using a multi-state programming operation. The controller determines to operate the memory system according to one of multiple modes. The modes include a first mode, where the binary write operations to the first section of the memory are interleaved with folding operations at a first rate, and a second mode, where the number of folding operations relative to the number of the binary write operations to the first section of the memory are performed at a higher than in the first mode. The memory system then operates according to determined mode. The memory system may also include a third mode, where folding operations are background operations executed when the memory system is not receiving data from the host.
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Patent Owner(s)
- SANDISK TECHNOLOGIES LLC
International Classification(s)
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
---|---|---|---|
Avila, Chris | Sunnyvale, US | 66 | 1459 |
Gavens, Lee M | Milpitas, US | 10 | 621 |
Gorobets, Sergey Anatolievich | Edinburgh, GB | 175 | 9359 |
Huang, Jianmin | Sunnyvale, US | 160 | 2564 |
Hutchinson, Neil David | Campbell, US | 2 | 157 |
Sprouse, Steven | San Jose, US | 38 | 806 |
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