US 11,531,587 B2 · Dynamic multi-stage decoding

Abstract

Methods and systems for decoding raw data may select a preliminary read-level voltage from a sequence of read-level voltages based on a decoding success indicator and execute a preliminary hard decoding operation to decode raw data read from a plurality of memory cells using the preliminary read-level voltage. If the preliminary hard decoding operation is successful, the decoded data from the hard decoding operation is returned. If the preliminary hard decoding operation is unsuccessful, a multi-stage decoding operation may be executed to decode raw data read from the plurality of memory cells using the sequence of read-level voltages, and returning decoded data from the multi-stage decoding operation upon completion of the multi-stage decoding operation. The decoding success indicator is maintained based on results of the preliminary hard decoding operation or the multi-stage decoding operation.

Claims20

Dependent claims

A machine-implemented method for non-volatile memories,

comprising:
for each one of memory portions of the non-volatile memories, selecting a respective number of program levels available for programming the respective one of the memory portions;
configuring each one of the memory portions to use the selected respective number of program levels;
converting data into first non-binary data for writing to one of the memory portions of the non-volatile memories;
generating a codeword based on the first non-binary data;
writing the codeword to the one of the memory portions;
and
reading the codeword from the one of the memory portions,
wherein:
the first non-binary data has a number base, which is based on the selected number of program levels available for programming the one of the memory portions;
the selected number is greater than two;
and
the reading comprises reading the codeword using the selected number of program levels.

10 more elements

A data storage system, comprising:

non-volatile memories comprising memory portions;
and
one or more controllers configured to cause:
for each one of the memory portions of the non-volatile memories, selecting a respective number of program levels available for programming the respective one of the memory portions;
configuring each one of the memory portions to use the selected respective number of program levels;
converting data into first non-binary data for writing to one of the memory portions of the non-volatile memories;
generating a codeword based on the first non-binary data;
writing the codeword to the one of the memory portions;
and
reading the codeword from the one of the memory portions,
wherein:
the first non-binary data has a number base, which is based on the selected number of program levels available for programming the one of the memory portions;
the selected number is greater than two;
and
the reading comprises reading the codeword using the selected number of program levels.

12 more elements

An apparatus, comprising:

non-volatile memories;
for each one of memory portions of the non-volatile memories, means for selecting a respective number of program levels available for programming the respective one of the memory portions;
means for configuring each one of the memory portions to use the selected respective number of program levels;
means for converting data into first non-binary data for writing to one of the memory portions of the non-volatile memories;
means for generating a codeword based on the first non-binary data;
means for writing the codeword to the one of the memory portions;
and
means for reading the codeword from the one of the memory portions,
wherein:
the first non-binary data has a number base, which is based on the selected number of program levels available for programming the one of the memory portions;
the selected number is greater than two;
and
the means for reading comprises means for reading the codeword using the selected number of program levels.

10 more elements

Dependencies are inferred from the claim text.

Dynamic multi-stage decoding

Life of this patent

Dynamic multi-stage decoding

Life of this patent

Abstract

Claims20