Method of facilitating reliable access of flash memory

Details Method of facilitating reliable access of flash memory Method of facilitating reliable access of flash memory

2011-08-30

2011-08-30

Trimmings, John (Department: 2117)

Error detection/correction and fault detection/recovery

Pulse or data error handling

Digital data error correction

C714S002000, C714S006240, C714S052000, C714S701000, C714S746000, C714S755000, C714S758000, C714S774000, C714S807000, C365S185090

Reexamination Certificate

active

08010876

ABSTRACT:
A method of facilitating reliably accessing flash memory is provided. During the write-in process, the present invention utilizes the steps of coding write-in data to generate extra data, and then generating the first error correction code by performing an error-correcting operation on the write-in data and the extra data. Finally, store the N write-in data and the generated K extra data into the data area and the first ECC into the spare area. During read process, the present invention utilizes the steps of reading data from the data area of the target flash-memory page to generate the second ECC, counting with the counter a number of bit differences between the first ECC and the second ECC, and selecting M data from the N write-in data and the K extra data as decoding factors to retrieve the N write-in data. The higher the counter values, the lower the likelihood the corresponding bit is selected to be retrieved.

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