DR: Overhead Efficient RLC Crosstalk Avoidance Code

Abstract

Recently proposed crosstalk avoidance coding mechanisms (CACs) are not able to prevent inductance effects. For solving this problem, an efficient numerical-based CAC mechanism, so called Double Rounded (DR) is proposed in this paper that considers inductance effects. The DR CAC reduces crosstalk faults by deleting bit patterns ‘11111’ and ‘00000’ completely. These patterns are the main sources of crosstalk faults considering inductance effects. The DR coding mechanism increases the reliability of chip channels and offers invariant delay for on-chip channels. The proposed coding mechanism uses a novel numerical system in generating code words that minimizes overheads of codec and is applicable for any arbitrary width of wires. To evaluate DR coding mechanism, VHDL simulations is used. Results of codec power consumption, area occupation, and critical path is calculated. These results show that worst crosstalk-induced transition patterns are completely avoided in wires using DR coding mechanism. Moreover DR coding mechanism provides improvements of 22 % in power consumption, 12.1 % in area occupation and 8% in critical path compared to the-state-of-the-art mechanism.