Files
- ATSAMD51P20A product page with datasheets (the main chip on the Grand Central)
- EagleCAD files on GitHub
- PDF for Grand Central PrettyPins Diagram
Page last edited December 03, 2025
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Introducing the Adafruit Grand Central M4 Express
This dev board is so big, it's not named after a Metro train, it's a whole freakin' station!
54
Beginner
Product guide
Downloads
![A terminal screen displays a command prompt with "==> []" on a dark background, indicating readiness for input. Indicative of a command line interface for CircuitPython.](https://cdn-learn.adafruit.com/guides/cropped_images/000/002/418/medium640thumb/ezgif.com-video-to-gif_%282%29.gif?1550616816)
