Sipeed Longan Nano RISC-V GD32VF103CBT6 Development Board
Longan Nano is a GD32VF103CBT6-based minimal development board based on GigaDevice's latest RISC-V 32-bit core microcontroller. Convenient for students, engineers, geeks, and enthusiasts to access the latest generation of RISC-V processors.
In the heart of Longan Nano is a GigaDevice's GD32VF103CBT6, based on Nucleisys Bumblebee kernel (support RV32IMAC instruction sets and ECLIC rapid interrupt).
You can download instruction set documents here: http://dl.sipeed.com/LONGAN/Nano/DOC/.
The chip has built-in 128KB Flash, 32KB SRAM, and peripherals listed below:
4 x universal 16-bit timer
2 x basic 16-bit timer
1 x advanced 16-bit timer
Watchdog timer
RTC
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
Longan Nano development board is breadboard-friendly. It has onboard 8M passive crystal, 32.768KHz RTC low-speed crystal, mini TF card slot, and uses the latest Type-C USB interface.