Arduino CorporationArduino Micro (With Headers) | A000053Embedded System Development Boards and Kits

The Arduino Micro is a microcontroller board based on the ATmega32u4 (datasheet), developed in conjunction with Adafruit. It has 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 reset button. It contains everything needed to support the microcontroller; simply connect it to a computer with a micro USB cable to get started. It has a form factor that enables it to be easily placed on a breadboard.

The Micro is similar to the Arduino Leonardo in that the ATmega32u4 has built-in USB communication, eliminating the need for a secondary processor. This allows the Micro to appear to a connected computer as a mouse and keyboard, in addition to a virtual (CDC) serial / COM port. 

This version is the Arduino Micro with headers. Click here for the Arduino Micro without headers.

• Microcontroller: ATmega32u4
• Operating Voltage:     5V
• Input Voltage (recommended):  7-12V
• Input Voltage (limits):     6-20V
• 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 (ATmega32u4) of which 4 KB used by bootloader
• SRAM:    2.5 KB (ATmega32u4)
• EEPROM:              1 KB (ATmega32u4)
• Clock Speed:       16 MHz

EAGLE files: arduino-micro-reference-design.zip

Schematic: arduino-micro-schematic-rev3b.pdf

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