The Pro Micro is an Arduino-compatible microcontroller board developed under an open hardware license by Sparkfun. Clones of the Pro Micro are often used as a lower-cost alternative to a Teensy 2.0 as a basis for a DIY keyboard controller/converter when a lower number of pins would suffice.
Like the Teensy 2.0, it sports an AVR ATmega32u4 8-bit microcontroller which has an integrated USB controller. It has a micro-USB type B port (Teensy 2.0: mini-USB), 18 I/O pins (Teensy 2.0: 25 I/O pins) and an integrated voltage regulator for 3V operation.
The Pro Micro is sold in a 3.3 V version (8 MHz) and a 5 V version (16 MHz). On the 3.3 V version, shorting a solder bridge (J1) on the chip bypasses the 3.3 V voltage regulator on the board. This would allow 5 V operation and running at 16 MHz clock. At 3.3 V, the ATmega32u4 is otherwise limited to an 8 MHz clock.
FEATURES
| Host port | USB Micro B |
|---|---|
| Microcontroller | ATMega32U4 |
| MPU | AVR (8-bit) |
| Voltage | 3.3V or 5V |
| Clock speed | 8 MHz or 16 MHz |
| Digital I/O pins | 18 |
| RAM | 2.5 KB |
| Program memory | 32 KB |
| EEPROM | 1 KB |
| Boot loader | Caterina |
DOCUMENT
SHIPPING LIST
- 1 x Arduino Pro Micro Atmega32U4 Board
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