CPU: GD32VF103CBT6 based on RISC-V 32-bit : for Xinlai Technology Main frequency: up to 108MHz Working voltage: 2.6~3.6V consumption: 1/3 of traditional -m3; Storage: 128KB Flash 32KB SRAM peripheral: 4 x 16-bit timer 2 x basic 16-bit timer 1 x advanced 16-bit timer Watchdog, , Systick 3 x USART 2 x I2C 3 x SPI 2 x I2S 2 x CAN 1 x USBFS(OTG) 2 x ADC(10 channel) 2 x DAC Keys: 1 reset key and 1 BOOT key (connected to GPIO) Size: 47.50 mm x 20.00 mm Screen interface: SPI interface Storage interface: onboard TF card holder Power supply mode: USB Type-c IO: standard 2.54mm pin array interface, leading out all resources of the chip Debugging interface: 2x4 row pin leads to JTAG debugging interface and serial port Crystal oscillator: 8MHz passive crystal oscillator+32.768 KHZ passive crystal oscillator LED: 1 RGB LED on board Number of GPIOs: 2 leads 28 GPIOs to the pin array Material: PCB+metal colour: red Package Contents: 2 x development board 4 x 2.54mm pin header