NAND FLASH MEMORY SYSTEMS WITH EFFICIENT SOFT INFORMATION INTERFACE

摘要

A controller for a nonvolatile memory device includes a transfer control module and a decoder module. The transfer control module is configured to request a read of data from a flash memory module. The data to be read includes data corresponding to a first codeword. The transfer control module is configured to receive hard decisions corresponding to the first codeword from the flash memory module. The transfer control module is configured to receive soft information corresponding to the first codeword from the flash memory module. Both the hard decisions corresponding to the first codeword and the soft information corresponding to the first codeword are received without receiving any intervening hard decisions or soft information corresponding to another codeword. The decoder module is configured to decode the first codeword using the hard decisions and the soft information corresponding to the first codeword.

主权项

1. A controller for a nonvolatile memory device, the controller comprising:
a transfer control module configured to
request a read of data from a flash memory module, wherein the data to be read includes data corresponding to a first codeword,receive hard decisions corresponding to the first codeword from the flash memory module, andreceive soft information corresponding to the first codeword from the flash memory module,wherein both the hard decisions corresponding to the first codeword and the soft information corresponding to the first codeword are received without receiving any intervening hard decisions or soft information corresponding to another codeword; and a decoder module configured to decode the first codeword using (i) the hard decisions corresponding to the first codeword and (ii) the soft information corresponding to the first codeword.