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Unformatted text preview: ial silicon reduction values. In  a formal mathematical model of this optimum
switch box design problem for arbitrary dimensions has been constructed. It gave a scheme to produce hyper-universal designs with
switches for 4-way FPGA switch boxes. In this
paper, we will further investigate this most common 4-way switch
box case, and give new theoretical results followed by extensive
experimental justiﬁcations. 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 range of low s. If we represent the number of switches of
an optimum 4-way switch box with a density of
= 6W for W being 2, 3, or 5;
= 6W + 1 for
W = 4;
6W + 2, and
6W + 1. For arbitrary large W’s, the bound can be shown to be under
make an even experimental comparison, we run VPR , today’s
published best FPGA router, for large benchmarks on the popular
Disjoint FPGA switch box structure and our proposed designs. The
results are quite encouraging...
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This document was uploaded on 12/26/2013.
- Fall '13