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Adafruit CH552 QT Py - 8051 Dev Board

Adafruit CH552 QT Py - 8051 Dev Board

Pimoroni

£4.13

Price read from Pimoroni on 2026-10-22. Check before buying.

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 and given the smol size, it is a nice matchup for a smol board. 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 gotbuilt-in 16K program FLASH memory and, 256-byte internal

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The part other shops don't tell you. Three separate questions, kept separate on purpose, each with its source.