The 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 board 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.

ATMEL & AVR ATMEGA32U4-MU VQFN-44_L7.0-W7.0-P0.50-BL-EP5.2 LCSC Part Number: C112161 JLCPCB Part Class: Extended Part Manufactured by MICROCHIP(美国微芯)

ATMEGA32U4RC-AU TQFP-44_L10.0-W10.0-P0.80-LS12.0-BL LCSC Part Number: C1337120 JLCPCB Part Class: Extended Part Manufactured by MICROCHIP(美国微芯)