June 2017
Intermediate to advanced
478 pages
13h 14m
English
Content preview from Mastering Embedded Linux Programming - Second Edition
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NAND flash
NAND flash is much cheaper than NOR flash and has a higher capacity. First-generation NAND chips stored one bit per memory cell in what is now known as an SLC or single-level cell organization. Later generations moved on to two bits per cell in multi-level cell (MLC) chips and now to three bits per cell in tri-level cell (TLC) chips. As the number of bits per cell has increased, the reliability of the storage has decreased, requiring more complex controller hardware and software to compensate. Where reliability is a concern, you should make sure you are using SLC NAND flash chips.
As with NOR flash, NAND flash is organized into erase blocks ranging in size from 16 KiB to 512 KiB and, once again, erasing a block sets all the bits ...
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