Open-hardware Lattice ECP5 board used for open-source FPGA development, education, LiteX and retro-computing projects.
LFE5U-85F-6BG381Copen toolchainprice unknowneducationvideoretrorisc-v
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Enter board slugs separated by commas, for example: sipeed/tang-nano-20k,icebreaker/icebreaker.
Larger Digilent Artix-7 trainer board for courses needing more peripherals than Basys 3.
XC7A100T-1CSG324Cprice unknowneducationvideoaudiorisc-v
| Field | ULX3S | Nexys A7 |
|---|---|---|
| Chip | LFE5U-85F-6BG381C | XC7A100T-1CSG324C |
| Family | ECP5 | Artix-7 |
| Device type | FPGA | FPGA |
| Price | unknown | unknown |
| Toolchains | Yosys + nextpnr + Project Trellis | Vivado WebPACK / ML Standard |
| Open toolchain | yes | no |
| Interfaces | Digital video connector, SD card, USB | Ethernet, VGA, USB |
| Memory | SDRAM varies by revision | DDR2 requires verification from Digilent resource center |
| Documentation | 72 | 82 |
| Difficulty | intermediate | beginner |
| Openness score | 95 | 15 |
| Where to get help | ULX3S project links | Digilent Forum |
| Typical risks | Memory, USB and video details are revision-dependent; check the exact PCB revision. | Split 50T/100T variants before publishing exact resource counts. |
| Better for | open-source flow | beginner learning |