Papilio 500K

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The Papilio One 500K comes fully assembled with a Xilinx XC3S500E and 4Mbit SPI Flash memory.

Papilio is an open-source FPGA project intended for education, hobbyists, engineers, or anyone interested in learning Digital Electronics in a friendly community.



Application Ideas


The Papilio One does not ship with the headers populated in order to allow the end user the greatest flexibility in deciding the final configuration. Headers can be ordered along with the Papilio One. The recommended configuration is to use Female Headers on the Papilio One's Wing Sockets and to use Male Headers on the Wings.




  • Four independent power rails at 5V, 3.3V, 2.5V, and 1.2V.
  • Power supplied by a power connector or USB.


  • Two channel USB connection for JTAG and serial communications implemented with FT2232.
  • EEPROM memory to store configuration settings for FT2232 USB chip.

Spartan 3E FPGA

  • 32MHz oscillator that can be used by Xilinx's DCM to generate any required clock speed.
  • VTQFP-100 footprint that supports Xilinx XC3S100E, XC3S250E, and XC3S500E parts.
  • Bank 0-3 can be jumpered to support 1.2V, 2.5V, or 3.3V.
  • Xilinx JTAG header supports Xilinx JTAG cables.
  • Power and I/O are routed to the side headers.
  • Board can be used with Bread Boards if only the outside row of the side headers is populated.


  • Easily add new functionality to the Papilio One with Wings that snap onto the board.
  • 48 bidirectional I/O lines which can be split up as:
    1. 1 - 32 Bit Wing or
    2. 3 - 16 Bit Wings or
    3. 6 - 8 Bit Wings

Pin definition and Rating

Mechanic Dimensions


Hardware Installation



Please list your question here:


If you have questions or other better design ideas, you can go to our forum to discuss or creat a ticket for your issue at linksprite support.


How to buy

Here to buy Pailio 500K on store

See Also

Other related products and resources.


This documentation is licensed under the Creative Commons Attribution-ShareAlike License 3.0 Source code and libraries are licensed under GPL/LGPL, see source code files for details.