Hardware Overview
Before we get into installing and using the Qwiic Pro Micro, let's quickly look at the board -- examine its inputs,
outputs, and other hardware quirks.
Old School to New School
The Qwiic Pro Micro USBC is a revision of the original Pro Micro. Overall, it is functionally the same as the
previous version. The board is the same size as the original Pro Micro but we added a few additional features by
shrinking down some components on the board. The major changes to the board that you will notice include:
Reset Button
USB C
Castellated Pads
Qwiic Connector
AP2112 3.3V Voltage Regulator
The benefit of the reset button is to quickly reset the board or place it into bootloader mode without the need to
take out a piece of jumper wire. The USB micro-b connector has been replaced with the USB type C connector.
The through hole pads have castellated edges for each pin to add a lower profile in your projects should you
decide build it into another assembly during production. Finally, a Qwiic connector is populated on the bottom of
the board to easily add Qwiic enabled I C devices.
Older 5V/16MHz
Pro Micro
Newer 5V/16MHz
Qwiic Pro Micro USB C
A subtle difference that you may not notice is the old Pro Micro used the MIC5219, which was able to handle a
maximum voltage input of 16VDC. The new Qwiic Pro Micro uses the AP2112 3.3V voltage regulator which can
handle a
maximum of 6V
. The output current is slightly higher in the Qwiic Pro Micro which peaks at about
600mA. You'll need to make sure to use an appropriate voltage regulator and components and regulate the
voltage down.
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