sparkfun ZED-F9P Hook-Up Manual page 8

MicroMod Processor General Pins
Next to the MicroMod Processor Board are extra pins if you need to use a digital or analog pin.
Power
There are a few ways to power the board. Voltage is regulated down to 3.3V with the AP7361 voltage regulator.
The square IC next to the USB C labeled as processor is where you will find the AP7361.
USB C Connector - You can connect a USB Type C cable from your computer's USB port to the board
through either of the USB Type C connectors labeled as u-center and processor. There are protection
diodes connected to the voltage lines so you can connect two USB cables at the same time to power the
board. The AP7361 voltage regulator will regulate the 5V from the USB port down to 3.3V for the system
voltage.
VIN - If you decide to connect to the VIN pin, we recommend a voltage between 3.3V to 6.0V. The AP7361
voltage regulator will regulate the voltage down to 3.3V for the system voltage.
3V3 - If you decide to power the board through the 3.3V pin, you could connect a regulated 3.3V to this pin.
Otherwise, you could use this to power any peripherals attached to the board.
Qwiic Connector - The Qwiic connector connects to 3.3V and GND to power any Qwiic-enabled devices.
Depending on your application, you could connect a regulated 3.3V through this port as well.
GND - Of course, you'll need to connect the ground plane to your power source. This pin is available should
you decide to power the board through the any of the PTH pins.