sparkfun DEV-16885 Quick Start Manual page 4

Power
There are a variety of power and power-related nets broken out to female header pins and their corresponding
through hole pads. The image below highlights those female headers and pads. The board can be powered from
the VIN pin with a recommended voltage between 3.3V to 6.0V. It can also be powered with 5V from the USB C
connector. The voltage is regulated down to 3.3V with the AP7361C voltage regulator to power your devices with
up to 1A of current. If your voltage is clean, and regulated, you can also connect it directly to the 3.3V line.
Backup Battery
The board has a built-in backup battery for Processor Boards with an RTC. Depending on the processor, it may
not be connected
USB Ports
You have the option of connecting the board to a computer using the USB connectors. The USB Type C connector
is used to power, program the processor board, or pass serial data to a serial port. If your processor board has the
ability, there is also an option for USB host through the female USB Type A connector. There is a Schottky diode
on the USB host's 5V pin but we do not recommend connecting two both the Type C and Type A ports.