ARDUINO - AT MEGA32U4 - ARDUINO MICRO - A000053

The Arduino Micro is a microcontroller board based on the ATmega32u4, 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. It also has other implications for the behavior of the board; these are detailed on the getting started page.

Technical specifications

Microcontroller - ATmega32u4

Operating Voltage - 5V

Input Voltage (recommended) - 7-12V

Input Voltage (limit) - 6-20V

Digital I/O Pins - 20

PWM Digital I/O Pins - 7

Analog Input Pins - 12

DC Current per I/O Pin - 40 mA

DC Current for 3.3V Pin - 50 mA

Flash Memory - 32 KB

Flash Memory for Bootloader - 4 KB

SRAM - 2.5 KB

EEPROM - 1 KB

Clock Speed - 16 MHz

Lenght - 48 mm

Width - 18 mm

Links:

getting started page