ButterStick by Good Stuff Department

Description

The ButterStick is an FPGA development board. Building off the OrangeCrab, the Butterstick's primary focus is exposing lots of fast I/O pins. To achieve this goal it makes use of the SYZYGY peripheral connector standard. The board features High-speed USB and Gigabit Ethernet for high-speed input/output to a computer. Additionally there is up to 1 GB of onboard DDR3 memory.

The development board makes use of the ECP5 FPGA from Lattice which is fully compatible with the open-source FPGA synthesis flow.

Features at a glance

• Compact Size
• High speed USB (480Mbit/s)
• Gigabit Ethernet
• DDR3 Memory (up to 8Gbits)
• SYZYGY compatible
• up to 82 I/O pins
• 5Gbps SERDES (up to 4x tx/rx lanes)

Hardware Overview

• Lattice ECP5 85F FPGA in BGA381 package
• 2Gbit/8Gbit DDR3L Memory (dual rank)
• USB-C USB2.0 connection
  • High-speed (480Mbit) ULPI PHY
• Non-volatile Storage
  • 128Mbit QSPI FLASH Memory
  • MicroSD socket
  • 4bit SD interface (CK, CMD, DAT0-3)
• Power supply
  • USB-C 5V input.
  • Aux 5V power input.
  • Onboard oscillators
  • 60Mhz
  • 25MHz (RGMII PHY)
  • Convenient 0.1" JTAG connector
  • User I/O
  • 2x Button
  • 7x RGB LED
  • SYZYGY A,B (Standard)
  • Adjustable VCCIO 1.2V-3.3V
  • up to 32 single ended I/O
  • 10 differential pairs
  • Dedicated clock input pins
  • SYZYGY C (Transceiver)
  • Adjustable VCCIO 1.2V-3.3V
  • up to 14 single ended I/O
  • 2x / 4x Lanes TX (5Gbps)
  • 2x / 4x Lanes RX (5Gbps)
  • 1x Reference clock input
• Board dimensions
  • Dimensions: 80mm x 49mm

ButterStick-r1.0-8G-85F | 
------------------------|
LFE5UM5G-85F-8BG381C    | 
2x MT41K256M16TW-107    |

License

• Hardware licensed under CERN OHL v1.2
• ButterStick files: https://github.com/gregdavill/ButterStick
• SYZYGY Specifications: https://syzygyfpga.io/