Improving The Life Time Reliability For Multilevel Phase Change Memory Using Non-Binary Orthogonal Latin Square Codes

Abstract

Frequently Error correction codes (ECCs) are used to protect memories over errors. Among ECCs, orthogonal Latin squares (OLS) codes used for memory protection due to their simplicity of the decoding algorithm that enables low delay implementations. An important issue is that when ECCs are used, the encoder and decoder circuits can also suffer errors. In this brief, a concurrent error detection technique for OLS codes encoders and syndrome computation is proposed and evaluated. The proposed method uses the properties of OLS codes to efficiently implement a parity prediction scheme that detects all errors that affect a single circuit node.