Main features

  • Long term availability
  • CPU Atmel AT91SAM9G25 SoC (ARM9 @ 400Mhz)
  • DDR2 Ram 128 or 256 MByte
  • Power supply: 5VDC via microUSB or 3.3VDC using the PCB pads
  • Line levels: TTL 3.3V (NOT 5V tolerant)
  • Operative temperature range:
    • ARIETTA-G25 (128MByte RAM): -20 +70 °C
    • ARIETTA-G25-256 (256MByte RAM): -0 +70 °C
  • Size: 53x25mm
  • PCB layers: 8
  • RoHS and REACH compliant. Low EMI
  • Designed and Made in Italy

Exposed signals and external devices

  • J4 Placement for a 20x2 pins connector pitch 2.54mm (100 mils) (pinout):
    • 1 full-speed usb host
    • 1 hi-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 bus
    • 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
    • No video or TFT output but the SPI bus can be used for small TFT display and I2C bus for small alphanumeric LCD
    • No direct LAN interface but the USB ports can be used with USB to LAN adapter
  • DP placements for a 6 pin male strip pitch 2.54 (100 mils) with the Debug Port Interface lines
  • Placement for IEE802.11 b/g/n Wi-Fi module WiFi USB adapter
  • Push-push type holder for bootable microSD (up to 64GB) with Linux pre-installed
  • microUSB connector to plug the Arietta to your PC and access to the internal Linux with an emulated LAN port over USB (USB gadget)
  • User configurable led on board
  • User configurable push button on board

Please note that not all the signales are available at the same time. Some line are muxed together.

Software Features

Pin muxing

Most of the Arietta lines on J3 can be configured for additional functions using the muxing cabability of the Atmel MPU. The default configuration depends from the at91-arietta.dtb file stored on the first micro SD partition and used at startup by the Linux Kernel.

The Arietta dynamic pinout page may helps you to understand what are the available peripherals and how to generate this file.

BOM origins

Component Brand and Origin
CPU Atmel Corporation (USA)
DDR2 RAM Micron Technology (USA) , Samsung (South Corea), Hynix (South Corea)
PCB Rayming PCB (China)
Quartz IEV Industria Elettronica Varese (Italy)
MicroSD holder JAE (Japan)
Passive Various vendors (China)
Connectors Various vendors (China)
WiFi module Various vendors (China)

Design and manufacturing