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Comment on Generic Universal Switch Blocks
January 2002 (vol. 51 no. 1)
pp. 93-95

In the paper, the authors defined the well-structured symmetric switch block M_N,W showed that M_N,W is universal for any pair of positive integers N and W. However, we find that this result is partially correct. Here, we show that, when N>=7, M_N,W is not universal for odd Ws (>=3) and it is universal for any even W.

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Index Terms:
Field programmable gate array, universal switch block design, FPGA routing.
Hongbing Fan, Yu-Liang Wu, Yao-Wen Chang, "Comment on Generic Universal Switch Blocks," IEEE Transactions on Computers, vol. 51, no. 1, pp. 93-95, Jan. 2002, doi:10.1109/12.980020
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