Avoiding errors in a flash memory by using substitution...

Details Avoiding errors in a flash memory by using substitution... Avoiding errors in a flash memory by using substitution...

2011-07-19

2011-07-19

Rizk, Sam (Department: 2112)

Error detection/correction and fault detection/recovery

Pulse or data error handling

Digital data error correction

C365S185200, C365S185300

Reexamination Certificate

active

07984360

ABSTRACT:
To store an input string of M N-tuples of bits, a substitution transformation is selected in accordance with the input string and is applied to the input string to provide a transformed string of M N-tuples of bits. M or more memory cells are programmed to represent the transformed string and preferably also to represent a key of the transformation. Alternatively, the memory selectively programs each of M or more cells to a respective one of 2Nstates. A mapping that maps the binary numbers in [0,2N−1] into respective states is selected in accordance with the input string and is used to program M cells to represent the input string. Preferably, a key of the mapping is stored in the memory in association with the M cells.

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