How can I convert size requirements from Altera devices to Xilinx devices?
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From: Sam on 1 Feb 2010 09:59 I have two designs for an Altera chip that use approximately 6,000 and 24,000 logic elements. I am looking at moving to Xilinx tools, but am not sure how these numbers translate across manufacturers. I have seen Xilinx FPGA with gate counts cited, but I am not sure what those number mean. Can anyone provide some guidance in this?
From: Symon on 1 Feb 2010 10:19 On 2/1/2010 2:59 PM, Sam wrote: > I have two designs for an Altera chip that use approximately 6,000 and > 24,000 logic elements. I am looking at moving to Xilinx tools, but am > not sure how these numbers translate across manufacturers. I have seen > Xilinx FPGA with gate counts cited, but I am not sure what those > number mean. > > Can anyone provide some guidance in this? 1) Download tools from Xilinx's website with free 60 day license. 2) Feed your design into Xilinx tools. 3) Look at numbers. Ta da! HTH., Syms.
From: rickman on 1 Feb 2010 22:32
On Feb 1, 9:25 pm, james <bu...(a)bud.u> wrote: > On Mon, 1 Feb 2010 06:59:33 -0800 (PST), Sam <kerr....(a)gmail.com> > wrote: > > |I have two designs for an Altera chip that use approximately 6,000 and > |24,000 logic elements. I am looking at moving to Xilinx tools, but am > |not sure how these numbers translate across manufacturers. I have seen > |Xilinx FPGA with gate counts cited, but I am not sure what those > |number mean. > | > |Can anyone provide some guidance in this? > | > |============== > > In my opinion about the best way to compare different vendor's FPGAs > is not to use stated gate count. Instead look at the features like > > # of LUTs > # of block ram > # of multipliers > # of DSP blocks > > It is better to compare the building blocks of the FPGA rather than an > estimated gate count. > > james And make sure you do your own counting of features like LUTs. Xome companies like to count "imaginary" features like "Logic Cells" which don't exist in *anyone's* FPGAs. Rick |