General Description

The Arduino Micro board is built around the ATmega32u4 microcontroller and has been developed in collaboration with Adafruit. It features 20 digital input/output pins (7 of which 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 includes everything you need to support the microcontroller. Simply connect it to a computer with a micro USB cable to get started. Its format allows for easy placement on a breadboard.

The Micro is similar to the Arduino Leonardo as the ATmega32u4 has built-in USB communication, eliminating the need for a second processor. This allows the Micro to appear to a connected computer as a mouse and keyboard as well as a virtual (CDC) serial/COM port. It also has other implications on the board's operation.

Technical Specifications Summary

• Microcontroller: ATmega32u4
• Operating Voltage Level: 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 is used by the bootloader
• SRAM: 2.5 KB (ATmega32u4)
• EEPROM: 1 KB (ATmega32u4)
• Clock Speed: 16 MHz
• Length: 48 mm
• Width: 18 mm
• Weight: 13 g