Custom digital protocols and precise timing
Programmable I/O state machines bit-bang protocols (WS2812, DVI, extra UARTs) without CPU load.
Engineering inference
Adafruit Industries
Adafruit QT Py RP2040
Adafruit QT Py RP2040: dual Cortex-M0+ at ~125 MHz, 264 KB RAM, 8 MB QSPI flash, 13 GPIO (4 ADC) at 3.3 V on castellated XIAO-footprint pads, USB-C, STEMMA QT I2C port, NeoPixel, 17.8 × 20.8 mm.
4900Revision rev BDevelopment boardPrice$9.95www.adafruit.com · in stock
Buy at www.adafruit.com Board essentials
Facts about the complete product. Unknown values remain open design questions.
- Exposed GPIO
- 13
- Board I/O voltage
- 3.3 V
- Board flash capacity
- 8 MiB
- Board SRAM capacity
- 264 KiB
A good fit for
Guidance to help you shortlist. The basis is shown for each recommendation.
Custom USB devices (HID, MIDI, serial)
Native USB on the RP2040 — the guide lists USB serial console, MIDI and keyboard/mouse HID (p10).
Engineering inferenceSpace-constrained and embedded builds
20.83 × 17.78 mm footprint.
Engineering inferenceLearning and fast prototyping
Programs from CircuitPython, MicroPython, Arduino.
Engineering inferenceInside this board
The board is the parent product. Each chip has its own memory, pins, capabilities and thermal limits.
main processor
RP2040
Raspberry Pi Ltd
bdcf0bd1-b665-5475-8472-7ca83732b951--mcu- Architecture
- Dual Arm Cortex-M0+
- Documented clock
- 133 MHz
- On-chip SRAM
- 264 KiB
voltage regulator
AP2112K-3.3
Diodes Incorporated
bdcf0bd1-b665-5475-8472-7ca83732b951--regrgb led
WS2812B
Worldsemi
bdcf0bd1-b665-5475-8472-7ca83732b951--neopixelFAQ
Adafruit QT Py RP2040 questions
What microcontroller does the Adafruit QT Py RP2040 use?
The Adafruit QT Py RP2040 is built around the RP2040, alongside AP2112K-3.3, WS2812B.
How many GPIO pins does the Adafruit QT Py RP2040 have?
13 GPIO pins are exposed. Xirkit documents 16 board pins, 13 of them with pin-level electrical limits.
Are the Adafruit QT Py RP2040 I/O pins 5 V tolerant?
No. The I/O pins are not 5 V tolerant — they run at 3.3 V logic; use a level shifter for 5 V signals. Input-high threshold: 2–3.6 V.
How much current can a Adafruit QT Py RP2040 GPIO pin source?
Documented output-high current per pin: ≤ 12 mA. Values are traced to the chip datasheet; see the pinout table for per-pin limits and conditions.
What voltage powers the Adafruit QT Py RP2040?
Supply range 5–5 V. Power inputs: 5V.
How much does the Adafruit QT Py RP2040 cost?
From $9.95 at www.adafruit.com. Prices are observed unit prices before tax and shipping.
What are the Adafruit QT Py RP2040 dimensions?
20.83 × 17.78 mm. A STEP model is available for enclosure fit checks.
Which interfaces does the Adafruit QT Py RP2040 support?
adc, spi, i2c, pwm, uart, gpio, pio, usb, other, clock.
How do I program the Adafruit QT Py RP2040?
Supported frameworks: CircuitPython, MicroPython, Arduino.
Where does this Adafruit QT Py RP2040 data come from?
Every value in this record is traced to a source — 2 documents including the board and chip datasheets — with the page and table cited per value. Unknowns are left explicit, never guessed.
Data & sources
Where these values come from
- Adafruit QT Py RP2040 datasheet — Adafruit Industries
- www.adafruit.com listing