CH552 QT Py Development Board 8051 Dev Board with STEMMA QT Interface

CH552 QT Py Development Board 8051 Dev Board with STEMMA QT Interface Description

The CH552 is an enhanced E8051 core microcontroller, compatible with the MCS51 instruction set, but with 8 to 15 times faster instruction execution. The core operates at 16MHz and 3.3V logic levels, and features 16KB of program Flash memory, 256 bytes of internal RAM, and 1KB of internal xRAM (xRAM supports DMA).
It also boasts clever features such as four built-in ADC channels, capacitive touch support, three timer/PWM channels, and hardware UART, SPI, and full-speed USB device controllers. The USB controller means it can function as a native USB device, such as a CDC serial port or a mouse/keyboard HID device.
It features a STEMMA QT connector-a cascaded I2C interface compatible with all STEMMA QT sensors and accessories. Additionally, we've added an RGB NeoPixel LED, a reset button, and a bootloader button.
Please note: This compact development board uses an 8-bit 8051 processor. It's a minimalist 8-bit microcontroller; it cannot run CircuitPython or MicroPython, nor can it truly run .

Key Features
Native USB Support: Can act as CDC serial or mouse/keyboard HID device
STEMMA QT Connector: JST SH 4-pin connector for solderless I2C connections and daisy-chaining
RGB NeoPixel LED: Built-in addressable RGB LED for visual feedback
4x 8-bit ADC Inputs: Analog inputs A0, A1, A2, and A3 pins
3x PWM Outputs: Pulse-width modulation outputs
4x Capacitive Touch: A0-A3 pins - no external components required
Hardware UART & SPI: Full hardware support for serial communication
3.3V Regulator: 600mA output
Reset & Bootloader Buttons: Reset and bootloader button for easy programming
Castellated Pads: Can be soldered flat to a PCB

Technical Specifications
Microcontroller: WCH CH552 (enhanced E8051 core)
Architecture: 8-bit 8051 (MCS51 instruction set compatible