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 Gowin Tang board for projects that need substantially more logic than Tang Nano and Primer boards.
GW5AST-LV138FPG676Aprice unknownvideonetworkingdsprisc-v
| Field | ULX3S | Tang Mega 138K |
|---|---|---|
| Chip | LFE5U-85F-6BG381C | GW5AST-LV138FPG676A |
| Family | ECP5 | GW5A |
| Device type | FPGA | FPGA |
| Price | unknown | unknown |
| Toolchains | Yosys + nextpnr + Project Trellis | Gowin EDA |
| Open toolchain | yes | no |
| Interfaces | Digital video connector, SD card, USB | not verified |
| Memory | SDRAM varies by revision | not verified |
| Documentation | 72 | 45 |
| Difficulty | intermediate | professional |
| Openness score | 95 | 35 |
| Where to get help | ULX3S project links | Sipeed forum |
| Typical risks | Memory, USB and video details are revision-dependent; check the exact PCB revision. | This entry intentionally avoids detailed connector claims until official board-revision documents are reviewed. |
| Better for | open-source flow | professional prototyping |