Codeword Selection for Crosstalk Avoidance and Error Correction on Interconnects

Ying Zhang, Huawei Li, Xiaowei Li, Yu Hu

Abstract: Crosstalk effects and soft errors on interconnects have been increasingly serious, which affects normal communication among cores. Therefore, it is desirable to design a reliable bus system without causing unacceptable performance reduction. In this paper, a new bus encoding method based on codeword selection is presented for enduring crosstalk-induced effects, which can avoid crosstalk and provide error correction as well. This method finds a subset from crosstalk avoidance code (CAC) to provide error correction. It can avoid crosstalk induced by late signal transition on checking bits in the previous methods. Extra wires for checking bus are never required in the proposed method. Experiment shows that the method reduces 6% wire overhead compared to the former methods. And it can also improve bus performance and reduce power dissipation.