Previous Revisions:
There aren't many OSHW ECP5 boards available. Given that this FPGA is fully supported by an open source toolchain I decided to create one. In order to make use of the DDR3L support the ECP5 has, I've added some DDR3L memory. The board matches the feather format
- Lattice ECP5-25F or ECP5-85F FPGA in csfBGA285 package
- 24 K - Look Up Tables
- 1008 Kb - Embedded Block RAM
- 194 Kb - Distributed RAM
- 28 - 18x18 Multipliers
- PLLs: 2
- Internal oscillator
- Flexible I/O for DDR3 Memory Support
- DDR3L Memory
- 128 Mbytes (1Gbit) or 512Mbytes (4Gbit)
- x16 data width to FPGA
- 1.35V low voltage operation
- USB-C connection
- Full-speed (12Mbit) USB with direct connection to FPGA
- Non-volatile Storage
- 128Mbit QSPI FLASH Memory
- Bootloader (First 4Mbits)
- User Bitstream
- User storage (Firmware/MSC backend/etc)
- QSPI compatible
- MicroSD socket
- 4bit SD interface (CK, CMD, DAT0-3)
- 128Mbit QSPI FLASH Memory
- Power supply
- High efficiency DCDC for main supplies
- Battery charger (100mA), with charge indicator LED
- LiPo battery connector (PH type) (1-cell: 3.7-4.2V)
- 48MHz onboard oscillator
- Accessible 0.1" JTAG breakout
- User I/O
- 1x Button
- 1x RGB LED
- 20x I/O on 0.1" headers
- Analog System
- Analog Mux
- SAR ADC, external RC / input comparator of FPGA
- Digital bypass
- Internal channels for supply monitor
- Battery voltage sensing
- Feather Format Board
- Dimensions: 22.86mm x 50.8mm (0.9" x 2.0")
- Castellated I/O edges
Example code for Verilog, Litex, And RiscV can be found here:
We have an OrangeCrab group on the 1BitSquared Discord
- Hardware in this repository is licensed under CERN OHL v1.2
- Gateware/Software/Firmware in this repository is licensed under MIT unless otherwise indicated
This board is an OSHWA approved design: AU000015