Tang Nano 20K is a core board using GOWIN Semiconductor GW2AR-18 QN88. The chip has 20736 logical lookup tables (LUT4) and 15552 registers (FF). There are two PLLs inside and multiple DSP units. Supports 18-bit x 18-bit multiplication to speed up number operations. It has built-in low-latency 64Mbits SDRAM, making it easier to run the NES emulator and better able to run soft-core Linux systems. The onboard BL616 chip serves as the FPGA JTAG downloader and serial port for communication with the FPGA. The board uses a 27MHz crystal oscillator by default to multiply the clock required for HDMI-compatible display, and is also equipped with an MS5351 clock generation chip to generate a variety of required clocks at will. The onboard download chip has been upgraded to a USB2.0 HS interface, with the functions of high-speed JTAG download, serial communication, high-speed SPI reception, and precise clock configuration. Note:Due to different production batches, the appearance is different, which does not affect the use. Colour:Black Material:PCB+electronic components Package Contents: 1 * core board 1 * data cable 1 * breadboard 2 * DS2 controller 2 * DS2 controller adapter board Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.