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Adafruit Feather M4 Express

Adafruit Feather M4 Express

MPN: 3857
Adafruit Industries LLC
ATSAMD51J19 Feather M4 Express SAM D ARM® Cortex®-M4 MCU 32-Bit Embedded Evaluation Board
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Overview

The Adafruit Feather M4 Express is a high-performance development board based on the ATSAMD51J19 microcontroller, featuring an ARM Cortex-M4 core running at 120 MHz with floating point support. It provides 512 KB of Flash and 192 KB of RAM, making it a powerful platform for complex processing tasks within the portable Feather form factor.

Why Choose This Part

This board offers a significant performance jump over standard M0 platforms with its 120 MHz core and expanded 192 KB RAM for memory-intensive applications. It includes 2 MB of SPI Flash for CircuitPython storage or data logging, and the built-in USB bootloader allows for driverless programming across major operating systems.

Applications

Portable Instrumentation
Utilize the high-speed 120 MHz clock and 12-bit ADC/DACs for real-time signal acquisition and processing.
Hardware Cryptography
Leverage the built-in AES256 and public key controller for securing data in edge-connected devices.
DSP Applications
The hardware FPU and DSP instructions allow for efficient processing of audio and sensor data streams.
Low-Power Datalogging
Integrated RTC and battery charging circuitry enable long-term remote monitoring with localized storage.

Getting Started

Engineers can develop using the Arduino IDE, CircuitPython, or Atmel Studio via the SWD debug pins. The board comes pre-programmed with the UF2 bootloader, allowing it to appear as a USB drive for easy firmware updates without specialized hardware.

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