Ultimate ECP5 Board. Fork Sand fork of https://github.com/daveshah1/TrellisBoard
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Ivan Olenichev 091f9da8ee
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Ultimate ECP5 Board

Fork Sand Fork

This is a fork/clone by Fork Sand, Inc. of upstream repo, now upgraded to KiCad 6:


fs-trellisboard front fs-trellisboard back

Upstream README

WIP - Rev 1.0 prototypes currently under test...

Photo of PCB rev 1.0 Render of PCB rev 1.0

Key Features

  • Largest ECP5; LFE5UM5G-85F
  • PCIe 2.0 x2 card edge connector on two SERDES channels
  • Remaining two SERDES channels on M.2 E-key connector
  • 1GByte x32 DDR3L (two x16 chips)
  • Dedicated HDMI output, using TFP410 serialiser
  • 1000BASE-T GbE connector with RGMII PHY
  • USB-A 2.0 host connector with ULPI PHY
  • FT2232H for debug JTAG and UART/FIFO with type-C connector
  • PCIe, external 12V or USB power input
  • 12 bicolour (tristate) user LEDs, 4 user buttons, 8 user DIP switches
  • 128Mbit QSPI flash for boot and data
  • microSD card connector
  • Dual PMOD connector with extra "middle" IO pins
  • As many remaining IO as possible on high speed FFC connectors with a differential optimised pinout (3x 24 IO). Selectable 1.8V/2.5V/3.3V


  • PCIe card form factor
  • At least Ethernet, USB-A, USB type-C power/debug and HDMI out
  • Other connectors probably would have to be on other sides. FFC connectors probably on top so they can loop over to another card to form a 2-slot card (e.g. with ADCs/DACs for SDR/DAQ)

Possible accessories using high-speed FFC connectors

  • MIPI DSI smartphone-style LCDs
  • MIPI CSI-2 cameras
  • High speed ADC/DAC
  • HDMI in/out, direct or using serialiser chip
  • LVDS video in/out for LCDs or block cameras
  • Breakout board to dual or triple PMOD