sparkfun ZED-F9P Hook-Up Manual page 15

Jumpers
Note: If this is your first time working with jumpers, check out the How to Work with Jumper Pads and PCB
Traces tutorial for more information.
There are jumpers located throughout the board. Below are the jumpers on the top side of the board.
Bypass (BYP): By default, the BYP is left open. Adding a solder jumper bypasses the 2A resettable fuse on
the back of the board should you decide to pull more than 2A from your USB source. Proceed with caution
should you decide to bypass the jumper.
Enable (EN): By default, the EN jumper is left open. This jumper is connected to a processor board's GPIO
pin. The processor board can control the ATP's voltage regulator. Depending on the processor, this may not
be connected.
Current Measurement (MEAS): By default, the MEAS is closed. Cutting the jumper and soldering to the
PTH pads will allows you to insert a current meter and precisely monitor the how much current your
application is consuming.
Below are the jumpers on the bottom side of the board.
3V3 LED: By default, the 3V3 LED is closed. Cutting this jumper will disable the LED when there is 3.3V.
VIN LED: By default, the VIN LED is closed. Cutting this jumper will disable the LED whenever there is an
input voltage.