Abstract
Occurring crosstalk fault between wires is among the significant reliability challenges in transferring data between Processing Elements (PEs). Crosstalk fault occurs due to inter-wire coupling capacitances based on the appeared transition patterns on the channel. Among these transition patterns, Triplet Opposite Direction (TOD) causes the worst crosstalk effects on the transferred flits in the channels of NoCs. Forbidden Pattern Free Crosstalk Avoidance Codes (FPF-CACs) can efficiently omit TODs. However, state-of-the-art FPF-CAC has ambiguity in its mapping algorithm. This problem leads to generating more than one code word for some data words. To solve this problem, this paper aims to reduce crosstalk fault by proposing a FPF-CAC called Omissive Penultimate-Fibo (OP-Fibo). OP-Fibo benefits ambiguity-free numerical system and mapping algorithm that can generate unique code words for all of the data words and can save additional wires. Evaluations indicate that the proposed numerical system can be utilized in wires with any arbitrary channel width and also, can significantly improve the reliability with better overheads with respect to recently proposed FPF-CAC.
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