Adafruit CH552 QT Py - 8051 Dev Board with STEMMA QT

This compact dev board features the classic 8-bit 8051 processor, providing a nostalgic yet powerful experience with up to 15 times faster instruction execution. The CH552 microcontroller is well-equipped with 16K program FLASH, 256-byte internal RAM, and 1K-byte internal xRAM, suitable for direct memory access.

The board operates at 16MHz and 3.3V logic, offering seamless connectivity with built-in USB device support, capable of acting as CDC serial or HID. Experimenting further is enhanced by 4 ADC channels, capacitive touch inputs, hardware UART, SPI, and I2C with the convenient STEMMA QT port.

With its Seeed Xiao-compatible form factor and connectors, this board supports soldering flat to a PCB, extending its usability. Integrated RGB NeoPixel, reset, and bootloader buttons provide additional control options. Please note, this bare-bones microcontroller isn't compatible with CircuitPython or Micropython and offers limited Arduino capabilities. Ideal for low-cost experimentation, you can explore a variety of interfaces despite its small size.