Arduino Yun Original ATmega32u4 from Arduino Official Arduino Distrubutor

Arduino Yun Original ATmega32u4 from Arduino Official Arduino Distrubutor

Description:
- The Arduino Yún is a microcontroller board based on the ATmega32u4 (datasheet) and the Atheros AR9331. The Atheros processor supports a Linux distribution based on OpenWRT named Linino. 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.
- NB : In some countries, it is prohibited to sell WiFi enabled devices without government approval. While waiting for proper certification, some local distributors are disabling WiFi functionality. Check with your dealer before purchasing a Yún if you believe you may live in such a country.

Summary
Because the Yún has two processors, the summary section shows the characteristics of each one in two separate tables.

AVR Arduino microcontroller
- Microcontroller：ATmega32u4
- Operating Voltage：5V
- Input Voltage：5V
- Digital I/O Pins：20
- PWM Channels：7
- Analog Input Channels：12
- DC Current per I/O Pin：40 mA
- DC Current for 3.3V Pin：50 mA
- Flash Memory：32 KB (of which 4 KB used by bootloader)
- SRAM：2.5 KB
- EEPROM：1 KB
- Clock Speed：16 MHz
- Linux microprocessor
- Processor：Atheros AR9331
- Architecture：MIPS @400MHz
- Operating Voltage：3.3V
- Ethernet：IEEE 802.3 10/100Mbit/s
- WiFi：IEEE 802.11b/g/n
- USB Type-A：2.0 Host/Device
- Card Reader：Micro-SD only
- RAM：64 MB DDR2
- Flash Memory：16 MB
- PoE compatible 802.3af card support