The following are pin out diagrams mapping the Papilio One headers to the Spartan 3E pin numbers and to the Arduino pin numbers. These charts come in handy when building a constraints file (UCF) for HDL projects and when building Arduino projects. (Click an image to download its PDF version)

These have been moved to a GitHub project and can be found here The files are being created in Illustrator and then exported as PDF files. Note that there are two branches: master and development. The latest work in progress will always be found on the development branch with the last good "release" being on master. Versions on master are being tagged for those that are curious to see the progression of the charts.


  • A big thank you to Kevin Lindsey for providing the original pin drawings.
  • And a big thanks to Atomsoft for the Arduino pin drawing

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