Yangtze Memory Technologies Co., Ltd.

Dili Wang

Hua Tan

Xuqing Jia

Teng Zhou

Weilin Liu

In certain aspects, a memory controller includes a logical-to-physical (L2P) search engine. The L2P search engine is configured to maintain an L2P mapping table that maps logical addresses to physical addresses, respectively. The L2P search engine is also configured to organize the physical addresses mapped by the L2P mapping table into address categories based on at least one address boundary.

Memory controller, memory system, and method for managing logical-to-physical mapping table based on address boundary

According to one aspect of the present disclosure, a decoder is provided. The decoder may include a cache module. The cache module may be configured to cache soft data related to a codeword to be decoded. The decoder may include a flip-indication module. The flip-indication module may be configured to obtain the soft data from the cache module. The flip-indication module may be configured to, when performing hard-decision decoding on the codeword to be decoded, determine, at least in a first flip iteration and with assistance of the soft data, a number of parity checks not satisfied by bits in the codeword to be decoded.

Decoder, decoding method, memory controller, and memory system

Examples provide for error correction. The error correction includes: obtaining first soft data according to first hard read data and cached second hard read data after hard decision decoding for the first hard read data fails, wherein the first hard read data is read according to a first hard read voltage, and the second hard read data is read according to a second hard read voltage before reading the first hard read data; and performing first soft decision decoding according to the first soft data and the first hard read data, or according to the first soft data and the second hard read data, wherein the first hard read voltage is one of a plurality of re-read voltages corresponding to a read command; and the second hard read voltage is an initial read voltage or a re-read voltage of the plurality of re-read voltages except the first hard read voltage.

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Wuhan, China

Dili Wang