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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Entry-level Digilent Artix-7 trainer board for introductory digital design courses.
XC7A35T-1CPG236Cprice unknowneducationcontrol
| Field | ULX3S | Basys 3 |
|---|---|---|
| Chip | LFE5U-85F-6BG381C | XC7A35T-1CPG236C |
| 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 | VGA, USB, USB-JTAG |
| Memory | SDRAM varies by revision | not verified |
| Documentation | 72 | 84 |
| 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. | Not a good fit for Linux-on-FPGA or memory-heavy SoC work. |
| Better for | open-source flow | beginner learning |