Adafruit QT Py CH32V203 Dev Board with STEMMA QT

The Adafruit QT Py CH32V203 is a compact development board featuring the powerful CH32V203G6 microcontroller. This board is based on the RISC-V architecture, running up to 144 MHz with a single 32-bit core. It includes 10KB SRAM, 32KB single-cycle flash, and an additional 224KB external XIP flash for program or data storage.

This board supports USB device functionality and includes onboard peripherals such as ADC inputs on all GPIOs, I2C with STEMMA QT connector, UART, SPI, RGB NeoPixel LED, reset and bootloader buttons. The USB Type C connector offers easy connection for programming and power.

Key Features:

• CH32V203G6 32-bit RISC-V microcontroller with 144 MHz clock speed
• Single 32-bit core with 1-cycle multiply/divide
• 10 KB SRAM and 32 KB single-cycle Flash plus 224KB external XIP flash
• USB Type C connector with native USB device support
• Built-in RGB NeoPixel LED
• 10 GPIO pins with ADC support on all
• I2C port with plug-n-play STEMMA QT connector
• Hardware UART and SPI
• 3.3V regulator with 600 mA peak output
• Reset and bootloader buttons for easy programming
• SWD data/clock pads for debugging
• Compact size, Seeed Xiao compatible form-factor and pinout

Note: The CH32 series has limited community support compared to other microcontrollers. It does not support CircuitPython or MicroPython, and Arduino support is early. This board is best suited for users comfortable working with makefiles, git repositories, and manual configuration.