Arietta G25 is a small and low-cost multi-chip module that integrates a 400MHz Atmel AT91SAM9G25 ARM9 CPU, 128MB of DDR2 RAM, a microSD card slot, a USB Device port, space for adding a WiFi module, and a 2×20-pin extension header with 2.54mm pitch.

This makes a great embedded Linux module for your next project. A bootable Debian Linux build for this module is available for download which you can install on a microSD card.

You also can get a 256MB version of the Arietta.

ARM9 Embedded Linux Module Features

• CPU: Atmel AT91SAM9G25 SoC (ARM9 @ 400MHz)
• Memory: 128 MBytes DDR2 RAM
• Power supply: 5V DC via microUSB or 3.3V DC using the PCB pads
• Line levels: TTL 3.3V (not 5V tolerant)

• Operating temperature range: -20 to +70 °C
• Dimensions: 53 × 25 mm
• PCB layers: 8
• RoHS and REACH compliant; low EMI

Exposed signals and external devices

• Pads for placing a 6-pin male strip to connect a Debug Port Interface module
• Pads for installing an IEE802.11b/g/n WiFi module WIFI-2-IA or WIFI-2 (the picture to the right shows a WIFI-2 installed for illustration only)
• Push-push type holder for a microSD card (up to 64GB) from which you could boot and run Linux
• micro-USB connector to plug the Arietta to your PC for access to the internal Linux with an emulated LAN port over USB
• User-configurable LED on board
• User-configurable pushbutton on board
• Pads for installation of a 2×20-pin connector, 100 mils pitch, which provides:
  • 1 Full-Speed USB Host
  • 1 High-Speed Host/Device (same port lines used for the microUSB port)
  • 1 Hi-Speed Host (same lines used for the WiFi adapter)
  • UART lines: 3 ports
  • I2C bus lines: 2 buses
  • SPI bus lines: 1 bus with up to 3 chip select (5 to 50 MHz)
  • PWM lines: 4 lines
  • A/D converters lines: 4 channels @ 10 bit
  • SSC/I2S interface for audio SoC

Software Features

• Linux Kernel version 4.2.x
• Debian Linux "Jessie" 8.2
• Buildroot Linux
• Bootable Linux microSD images available to download which you can install yourself, or you can purchase cards with images already installed
• Complete tutorials to build all from sources
• Fully open-source firmware, software environments and toolchains available for free
• Freely available tutorials and code examples
• Thousands of open-source ready-to-use packages available from the Debian Wheezy for Armel repositories
• Programmable in almost any language: C, C++, Python, Java, PHP, Perl, Node JS, Lua, Basic, Shell
• GNU C, Python, Perl and PHP already installed in the available microSD images, for in-board development
• Codiad Web-based IDE to edit your sources directly via browser
• Shell-in-a-box Web-based AJAX terminal emulator to have access to the Linux command prompt

Powering the Arietta G25

5V Power Supply

3.3V Power Supply

Power Consumption

Arietta G25 SoM Resources

• Interactive Arietta Pinout and Device Tree Blob Compiler (disable your pop-up blocker)
• Arietta Mechanical Drawing (PDF)
• Arietta Mechanical Drawing (DWG)
• Arietta Schematic
• Arietta STEP Module
• Instructions for Creating a Bootable microSD Card (zipped HTML document)
• Arietta G25 boot and rootfs partitions (zipped)
• Acme Tutorials Page has instructions and examples in many programming languages
• Atmel SAM9G25 Page with CPU datasheet and documentation
• Atmel AT91SAM Software Page has drivers and libraries for building applications (non-Linux)
• Programming Examples Page (links to GitHub repository, plus instructions)
• Atmel Linux4SAM Page
• Acme Systems Support Group