Skhynix Inc.

Korea Advanced Institute of Science and Technology

Youngook Song

Joonwoo Kim

Wooyoung Kim

Youngjae Jin

Hyunho Kim

Sanggu Jo

Incheol Park

A Reed Solomon decoder may include a syndrome calculation (SC) circuit, a key equation solver (KES) circuit, and a Chien search and error evaluation (CSEE) circuit. The SC circuit calculates a syndrome from a codeword. The KES circuit includes a plurality of sub-KES circuit and calculates an error location polynomial and an error evaluation polynomial from the syndrome. The CSEE circuit calculates an error location and an error value from the error location polynomial and the error evaluation polynomial. Each of the plurality of sub-KES circuits, the SC circuit and the CSEE circuit respectively constitute pipeline stages. The Read Solomon decoder may also include a FIFO queue that queues the codeword among a plurality of codewords sequentially received, and an error correction circuit that produces error corrected data using an output from the FIFO queue, the error location, and the error value.

Reed solomon decoder and semiconductor device including the same

In an embodiment a semiconductor device may include a weakness detector configured to manage error occurrence information by dividing the memory device into a plurality of areas, to control a first refresh period for a first refresh request at each of the plurality of areas based on the error occurrence information and to generate a second refresh request for a second refresh address included in each of the plurality of areas based on the error occurrence information, and a refresh controller configured to generate a first refresh command according to the first refresh period and output the first refresh command to the memory device and to output a second refresh command and the second refresh address to the memory device according to the second refresh request and the second refresh address.

Semiconductor device and method for controlling a refresh operation and a memory system including the same

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Seoul, South Korea

Youngook Song