Arduino YUN Product Overview | DigiKey Daily
The Arduino YUN, based on ATmega23u4 microcontroller, is similar to the Arduino Leonardo with an integrated WiFi system-on-a-chip (SOC). The Yun WiFi SOC used Linino making it capable of use as either a WiFi or Ethernet interface. End users have 20 digital I/Os, 12 analog inputs, and 7 PWM channels available. The Arduino YUN is available at DigiKey: http://www.digikey.com/product-detail/en/A000008/1050-1065-ND/4486331.

