Skhynix Inc.

Sang Uhn Cha

Sun Ho Kim

Yong Mi Kim

Mun Seon Jang

Seong Yoon Kang

Jae Hun Lee

A memory includes a memory core, an error correction code (ECC) engine, and an error determination circuit. The ECC engine is configured to generate an error correction code to be stored in the memory core together with write data by using the write data during an encoding operation, and to correct an error of read data read from the memory core using the error correction code read from the memory core during a decoding operation. The error determination circuit is configured to determine that, during the decoding operation, a 1-bit error exists when upper index portions of syndromes generated by the ECC engine have odd weights, and to determine that a correctable 2-bit error exists when the upper index portions of the syndromes are one of predetermined even weight patterns.

Memory including error correction code engine

A memory may include a memory core; a first ECC engine configured to correct an error having a first pattern, the error occurring in read data read from the memory core; and a second ECC engine configured to correct an error having a second pattern, the error occurring in the read data read from the memory core. One of the first ECC engine and the second ECC engine may be selectively activated based on an address used to access the memory core.

Memory including ECC engine

A memory system may include a memory core; and an ECC engine configured to, during a write operation, perform a logical operation on an M-bit write data and an H matrix, and generate an N-bit first error correction code and an N-bit second error correction code to be stored in the memory core together with the write data, where N is an integer of 2 or more and M is a multiple of N. The H matrix may include an upper matrix having a size of N*(M+2N) and a lower matrix having a size of N*(M+2N), the lower matrix may include M/N Tcompanion matrices each having a size of N*N, and k of the Tcompanion matrices may have values which are positive integers different by N or more for each companion matrix.

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Gyeonggi-do, South Korea

Sang Uhn Cha