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CH552 QT Py - 8051 Dev Board with STEMMA QT (ID:5960)

Adafruit  |  SKU: 4579
£5.99
Tax included, shipping and discounts calculated at checkout.
DESCRIPTION

What a cutie pie! Or is it... a QT Py? This diminutive dev board comes with a throwback processor - an 8-bit 8051! This tiny core is a big change from something like the the ESP32-S3 QT Py with two 240MHz 32-bit cores, but there's lots of folks interested in the CH552.

The CH552  is an 'enhanced' E8051 core microcontroller, compatible with MCS51 instruction set but with 8~15 times faster instruction execution speed. You can run this core at 16MHz and 3.3V logic, and it's got built-in 16K program FLASH memory and, 256-byte internal RAM plus 1K-byte internal xRAM (xRAM supports DMA. It's also got some cute tricks up it's sleeve, like 4 built-in ADC channels, capacitive touch support, 3 timers / PWM channels, hardware UART, SPI, and a full-speed USB device controller. The last one means it can act like a native USB device such as CDC serial or mouse/keyboard HID.

If you're interested in playing with this chip, Adafruit wrapped it up in a QT Py format. The pinout and shape is Seeed XIAO compatible, with castellated pads so you can solder it flat to a PCB. It comes with Adafruit's favourite connector - the STEMMA QT, a chainable I2C port that can be used with any of their STEMMA QT sensors and accessories. They also added an RGB NeoPixel and both a reset button and 'bootloader enter' button.

Please note! This is a minimal 8-bit microcontroller, and it definitely does not run CircuitPython or Micropython. It also doesn't really run Arduino. 

  • Same size, form factor, and pin-out as Seeed Xiao
  • USB Type C connector
  • CH552 8-bit 8051 microcontroller core with 3.3V power/logic. Internal 16 MHz oscillator.
  • Native USB
  • Built-in RGB NeoPixel LED
  • 10 GPIO pins:
    • A2 pin is the same as MOSI pin (it's the hardware SPI port and one of only 4 ADC pins)https://github.com/DeqingSun/ch55xduino4 x 8-bit analogue inputs on A0, A1, A2, and A3
    • 3 x PWM outputs
    • I2C port with STEMMA QT plug-n-play connector
    • Hardware UART
    • Hardware SPI
    • 4 x Capacitive Touch with no additional components required, on A0-A3 pins
  • 3.3V regulator with 600mA peak output
  • Reset switch and bootloader for starting your project code over or entering USB ROM bootloader mode
  • Really really small
RESOURCES
CH552 QT Py - 8051 Dev Board with STEMMA QT (ID:5960)
Adafruit

CH552 QT Py - 8051 Dev Board with STEMMA QT (ID:5960)

£5.99
DESCRIPTION

What a cutie pie! Or is it... a QT Py? This diminutive dev board comes with a throwback processor - an 8-bit 8051! This tiny core is a big change from something like the the ESP32-S3 QT Py with two 240MHz 32-bit cores, but there's lots of folks interested in the CH552.

The CH552  is an 'enhanced' E8051 core microcontroller, compatible with MCS51 instruction set but with 8~15 times faster instruction execution speed. You can run this core at 16MHz and 3.3V logic, and it's got built-in 16K program FLASH memory and, 256-byte internal RAM plus 1K-byte internal xRAM (xRAM supports DMA. It's also got some cute tricks up it's sleeve, like 4 built-in ADC channels, capacitive touch support, 3 timers / PWM channels, hardware UART, SPI, and a full-speed USB device controller. The last one means it can act like a native USB device such as CDC serial or mouse/keyboard HID.

If you're interested in playing with this chip, Adafruit wrapped it up in a QT Py format. The pinout and shape is Seeed XIAO compatible, with castellated pads so you can solder it flat to a PCB. It comes with Adafruit's favourite connector - the STEMMA QT, a chainable I2C port that can be used with any of their STEMMA QT sensors and accessories. They also added an RGB NeoPixel and both a reset button and 'bootloader enter' button.

Please note! This is a minimal 8-bit microcontroller, and it definitely does not run CircuitPython or Micropython. It also doesn't really run Arduino. 

RESOURCES
View product