The Arduino Pro Micro ATmega32U4 (5V/16MHz) is an ultra-compact, breadboard-friendly development board. Because its microcontroller features a built-in USB transceiver, the board natively emulates USB devices like keyboards, mice, and serial/COM ports.Core Specifications
- Microcontroller: ATmega32U4
- Operating Voltage: 5V
- Clock Speed: 16 MHz
- Digital I/O Pins: 12 (with 5 PWM outputs)
- Analog Input Pins: 4 to 9 (depending on the specific clone/pinout)
- Hardware Serial: Dedicated Rx and Tx pins
How to Program It
- Board Selection: In the Arduino IDE, you must select “Arduino Leonardo” under the Tools > Board menu to successfully upload sketches.
- Port: Choose the corresponding COM port that appears when you plug in your board’s Micro-USB or Type-C connector.
Important Power Constraints
- Voltage Input: The onboard voltage regulator accepts an input of 6V to 9V DC.
- RAW Pin: Always connect unregulated power supplies to the RAW pin, not the VCC pin. Supplying voltage directly to the VCC pin will bypass the regulator and permanently damage the 5V microcontroller.
- VCC Pin: The VCC pin acts as a 5V regulated output to power low-current sensors.
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