Compact Gowin GW2AR board with HDMI, audio amplifier, TF card slot, SDRAM, and onboard debugger.
GW2AR-LV18QN88C8/I7open toolchain28.17 USDeducationvideoaudiorisc-v
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Compact open-source Lattice ECP5 board commonly used with LiteX, USB and open-source ECP5 flows.
LFE5U-25F/85Fopen toolchainprice unknownrisc-vlinuxusbeducation
| Field | Tang Nano 20K | OrangeCrab |
|---|---|---|
| Chip | GW2AR-LV18QN88C8/I7 | LFE5U-25F/85F |
| Family | GW2A/GW2AR | ECP5 |
| Device type | FPGA | FPGA |
| Price | 28.17 USD | unknown |
| Toolchains | Gowin EDA, Yosys + nextpnr-gowin + Apicula | Yosys + nextpnr + Project Trellis |
| Open toolchain | yes | yes |
| Interfaces | HDMI, MAX98357A I2S amplifier path, TF card slot, USB Type-C, Onboard BL616 JTAG, USB UART | USB, MicroSD |
| Memory | 32-bit SDR SDRAM 64 Mbit, Onboard flash 64 Mbit | DDR3 requires revision check |
| Documentation | 78 | 65 |
| Difficulty | beginner | intermediate |
| Openness score | 76 | 92 |
| Where to get help | Sipeed forum, r/GowinFPGA | OrangeCrab GitHub organization |
| Typical risks | Verify exact board revision before using pin labels, constraints, or power assumptions. Onboard debugger recognition Flash persistence mode | Feature set differs across OrangeCrab revisions; verify exact revision. |
| Better for | beginner learning | open-source flow |