Tang Nano 20K

Update history
Date Version Author Update content
2023-02-27 v0.1 wonder
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Tang Nano 20K is a development board, using the GW2AR-18 QN88 FPGA, containing 20736 LUT4 logic cells and 15552 Filp-Flops. There are 2 PLL in this FPGA chip, and many DSP units supporting 18 bit x 18 bit multiplication. Onboard BL616 is used for downloading bitstream into FPGA, and it's also used as USB to serial convertor to communicate FPGA with computer via UART. The 27MHz crystal generates the clock for HDMI display, onboard MS5351 clock generating chip also provides mutiple clocks.

Rendering appearance


Item Detail Others
Logic units(LUT4) 20736
Flip-Flop(FF) 15552
Shadow SRAM (S-SRAM)(bits) 41472
Block SRAM (B-SRAM)(bits) 828K
Numbers of B-SRAM 46
32bits SDR SDRAM 64M bits
Numbers of 18x18 Multiplier 48
Numbers of PLLs 2
I/O Bank 8
Onboard debugger BL616 · JTAG for FPGA
· USB to UART for FPGA
· USB to SPI for FPGA communication
· Control MS5351 generate frequency
Clock generator MS5351 Provide extra 3 clocks for FPGA
CLick me to see how to config MS5351
Display interface · 40Pins RGB lcd connector
· HDMI interface
LED 6 Low voltage level enable
RGB LED 1 WS2812
User key 2
TF Card Slot 1
PCM Amplifier 1 MAX98357A,for audio driving
Storage 64Mbits Flash To save bitstream
Size 22.55mm x 54.04mm Visit 3D file for more information

Function diagram


Detailed Function diagram

tang_nano_20k_functionalannotation_top tang_nano_20k_functionalannotation_bot

Pin diagram


FPGA Jtag test point

We reserved jtag test point on Tang Nano 20K, for those who want to use their own debugger.

Note: There is onboard Jtag for download FPGA firmware, so this Jtag test point is only for those who want to use their own debugger.


Hardware information

PCB BOM(Visit the html file in your board version)
Board Size
Bosrd 3D File
Part of chip datasheet

Using guide

Install IDE -> Prepare your code -> Burn into board

More example codes Github

Studying resource



How to store bitstream

Tang Nano 20K uses the external Flash to save the firmware, we need to download the bitstream to store the firmware.

Visit Tang Questions to find more solutions