On Optimum Switch Box Designs for 2-D FPGAs

A previous work has constructed a formal mathematical

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Unformatted text preview: us work has constructed a formal mathematical model of this optimum design problem for switch boxes with arbitrary dimensions, and gave a scheme to produce hyper-universal designs with less than 6.7W switches for 4-way FPGA switch boxes. In this paper, we will further investigate this most common 4-way switch box case, and will give new theoretical results followed by extensive experimental justification. The results seem to be quite attractive. We show that such an optimum switch box can be built with a very low number of additional switches beyond 6W for today’s practical plus 1 or 2 additional switches range of low ’s (e.g. just for ’s up to 7). Even for arbitrary large ’s, the bound can be shown to be under . To make experimental comparison, we run today’s published best FPGA router VPR on large benchmarks for the popular Disjoint structure and our proposed designs. The results are quite encouraging. Field Programmable Gate Array (FPGA), a kind of Very Large Scale Integrated (VLSI) circuit, consists of an array of pre-fabricated functional blocks and wire segments with user-programmability of logic and routing re...
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