Lattice FeatherWing – An iCE40-powered add-on FPGA board for Adafruit Feather

Oak Development Technologies has recently announced Lattice FeatherWing – An iCE40-based development board designed to be controlled by Adafruit Feather. Previously we wrote about the IcyBlue Feather V2, a standalone development built around a Lattice Semi iCE5LP4K FPGA. But this FeatherWing board is designed to add functionality to your existing Adafruit Feather board.

The Lattice FeatherWing expands your Adafruit Feather with a Lattice iCE5LP4K FPGA. It connects and gets programmed over SPI so you can use all the FPGA’s GPIO pins through the header blocks. There’s also a built-in RGB LED directly connected to the FPGA’s open-drain pins, for visual feedback.

Previously, we have written about many Lattice Semi FPGA-based development boards, such as the tinyVision.ai Pico-Ice boardSilicon Witchery S1, and ULX3S Education Board. Feel free to check those out if you want a standalone FPGA board.

Lattice FeatherWing An iCE40 Powered Add On Board for Adafruit Feather

  • FPGA – Lattice Semi iCE40 Family ICE5LP4K-SG48ITR
    • Logic Cells – Approximately 3520 logic cells
    • Memory – 80 Kbits of embedded Block RAM (EBR)
    • Integrates two hardware I2C and SPI blocks for enhanced functionality
  • Supported I/O Standards – LVCMOS33, LVCMOS25, and LVCMOS18
  • Communication Blocks
    • 2x I2C hard blocks
    • 2x SPI hard blocks
  • Indicators – RGB LED as status indication (24 mA Current Drive)
  • Clock Management
    • One Phase-Locked Loop (PLL) for advanced clock management
    • Multiple on-chip oscillators for standalone operation
  • GPIO – 47 Accessible GPIOs
  • Form Factor – Adafruit Feather form factor

Lattice FeatherWing Top and Bottom

Like the previous IcyBlue Feather V2 board, this board is also compatible with open-source tools like IceStorm and proprietary software from Lattice Semiconductor, such as the Diamond Programmer.

Other than that not much information is available, but the company says all the previous examples on their GitHub repos will be compatible with this board. At the time of writing no such schematics or design files for the board are available, but they should be available in the future. you can get your hands on this unique development board at Oak Development Technologies Tindie store priced at $24.95.

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