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I'm browsing through the specs of Arista's Stratix V FPGAs. The first row of Table 1 is labelled "Equivalent LEs".

What are "equivalent logic elements"? What "logic element" do they use as a baseline? I'm assuming the number given is computed from the number of Adaptive logic modules (ALMs) and the number of registers. Is that correct? What is the formula?

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    \$\begingroup\$ Marketing term. Much like 3(=2.2)GHz processors. \$\endgroup\$ – Brian Drummond Oct 21 '13 at 18:31
  • \$\begingroup\$ What do you mean 3(=2.2)GHz? Are they artificially bumping up the numbers? \$\endgroup\$ – Randomblue Oct 22 '13 at 21:44
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Its a term used to try to bridge the world from ASIC & discrete logic to how FPGA function with their slices and lookup tables. One slice could be used to create a single AND gate or a to some extent part of a larger adder. By rationalising the equivalent logical gates required is some pseudo way of marketing their size.

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