FNS-CATF-CAC: An Efficient Crosstalk Avoidance Code to Reduce the Switching Activity in TSV Arrays

The through silicon via (TSV) arrays play the role of vertical electrical interconnections in the 3-D stacked integrated circuits. However, the coupling crosstalk between the adjacent TSVs increases the interconnection delay and deteriorates the signal integrity in TSV arrays. The crosstalk avoidance code (CAC) techniques based on the Fibonacci numeral system (FNS) or the improved FNS are capable of mitigating the crosstalk in TSV arrays, but the existing schemes are hindered by the hardware overhead, crosstalk suppression ability and switching activity. This article proposes the FNS-based cyclic adjacent transition free CAC with the ouroboros mapping rule for the rectangular and hexagonal TSV arrays. The proposed scheme can reduce the crosstalk even in the presence of the edge effect. Compared with the previous methods, the proposed scheme consumes significantly small hardware overhead in large-scale arrays. And the proposed method can reduce the switching activity on TSVs, thereby alleviating the power consumption in TSV arrays.