Method for increasing coding rate of TLC flash
A coding rate and flash memory technology, which is used in the generation of response errors, redundant codes for error detection, instruments, etc., can solve the problems of low coding rate and small length of user data, and achieve the effect of improving the coding rate
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[0017] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0018] In the prior art, the TLC NAND adopts the LDPC error correction algorithm throughout the life cycle, and the encoding rate=user data size / (user data size+LDPC check data size). figure 2 It is the relationship between BER and PE Cycle of various types of flash memory. The BER of TLC NAND increases monotonously with the PE Cycle. When the PE Cycle is small, the BER is also relatively small. At this time, the BCH error correction algorithm is completely suffici...
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