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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
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