Compact open-source Lattice ECP5 board commonly used with LiteX, USB and open-source ECP5 flows.
LFE5U-25F/85Fopen toolchainprice unknownrisc-vlinuxusbeducation
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Enter board slugs separated by commas, for example: sipeed/tang-nano-20k,icebreaker/icebreaker.
Gowin GW2A-18 dock-style board intended for secondary development with more connectors than Tang Nano boards.
GW2A-LV18PG256C8/I7open toolchainprice unknowneducationvideonetworkingrisc-v
| Field | OrangeCrab | Tang Primer 20K Dock |
|---|---|---|
| Chip | LFE5U-25F/85F | GW2A-LV18PG256C8/I7 |
| Family | ECP5 | GW2A |
| Device type | FPGA | FPGA |
| Price | unknown | unknown |
| Toolchains | Yosys + nextpnr + Project Trellis | Gowin EDA, Yosys + nextpnr-gowin + Apicula |
| Open toolchain | yes | yes |
| Interfaces | USB, MicroSD | Ethernet, HDMI, USB 2.0, SD card, JTAG/UART connector |
| Memory | DDR3 requires revision check | DDR3 1 Gbit, NOR flash 64 Mbit |
| Documentation | 65 | 68 |
| Difficulty | intermediate | intermediate |
| Openness score | 92 | 70 |
| Where to get help | OrangeCrab GitHub organization | Sipeed forum |
| Typical risks | Feature set differs across OrangeCrab revisions; verify exact revision. | Dock-specific features must be checked against the dock revision documentation. |
| Better for | open-source flow | open-source flow |