Method and apparatus for generation of soft decision error correction code information

摘要

A method and apparatus for generating soft decision error correction code information. The method includes generating or creating a lookup table (LUT), such as a log likelihood ratio (LLR) lookup table, characterizing a flash memory device. The method also includes loading the lookup table into the SSD controller. The method also includes accessing the lookup table to assign LLR or other characteristic values to the cells of a flash memory device. The method also includes decoding the data in a flash memory device using the soft decision information provided by the lookup table and assigned to the appropriate cells of the flash memory device.

主权项

1. A method for providing soft decision information for error correction codes for a flash memory device, comprising:
generating an offline lookup table of characteristic values of the flash memory device; loading the lookup table into a solid state device (SSD) controller to which the flash memory device is coupled; accessing the lookup table to assign characteristic values to one or more cells of the flash memory device; and decoding data in the flash memory device using the characteristic values provided by the lookup table and assigned to the one or more cells of the flash memory device to provide soft decision information for error correction codes.