The Arduino Yún is a microcontroller board based on the Atmega32u4 and the Atheros AR9331. The Atheros processor supports a Linux distribution based on OpenWrt named OpenWrt-Yun. The board has built-in Ethernet and WiFi support, a USB-A port, micro-SD card slot, 20 digital input/output pins (of which 7 can be used as PWM outputs and 12 as analog inputs), a 16 MHz crystal oscillator, a micro USB connection, an ICSP header, and a 3 reset buttons.
Specifications
Architecture
MIPS @400MHz
Card Reader
Micro-SD only
Clock Speed
16
MHz
Current
DC Current per I/O Pin - 40 mA
DC Current for 3.3V Pin - 50 mA
EEPROM
1
KB
Ethernet
IEEE 802.3 10/100Mbit/s
Flash Memory
Linux Microprocessor - 16 MB
Atmega32u4 - 32 KB (of which 4 KB used by bootloader)
I/O Pins
Digital I/O Pins - 20(PWM Channels 7)
Analog Input Pins - 12
Input Voltage
5
V
Memory
RAM - DDR2 64
MB
Microcontroller
ATmega32U4
Operating Voltage
Linux Microprocessor - 3.3V
Atmega32u4 - 5V
Processor
Atheros AR9331
SRAM
2.5
KB
USB Type-A
2.0 Host
WiFi
IEEE 802.11b/g/n