PTC
- By default, the jumper is open and located on the bottom of the board. For advanced users that know
what you are doing, add a solder blob to the jumper to bypass the resettable PTC fuse to pull more than 2A
from the USB source.
3.3V EN
- By default, this jumper is open and located on the bottom of the board. Closing this jumper
enables processor control of the 3.3V bus.
VIN LED
- By default, this jumper is closed and located on the bottom of the board. Cut this trace to disable
the LED that is connected to the input of the USB
3.3V LED
- By default, this jumper is closed and located on the bottom of the board. Cut this trace to disable
the LED that is connected to the output of the 3.3V voltage regulator.
Main Board - Single
Top View Jumpers
Main Board - Single
Bottom View Jumpers
Included only on the Double Main Board are two 1x3 male headers with 2-pin jumper shunts to enable the 3.3V
voltage regulator for any Function Board connected to Function Zero and Function One using alternative
Processor GPIO pins. Since certain processors have limited GPIO and may not be broken out on certain locations,
alternative pins have been provided on the board. The
ALT PWR EN0
jumper allows users to control the 3.3V
voltage regulator on any Function Board that is connected to
Function Zero
. When the jumper shunt is on the left
side toward the 2-pin JST connector, the jumper shunt connects the
PWR EN0
to the Processor Board's GPIO
G5
pin. Moving the jumper shunt to the other side connects the Processor Board's GPIO
G5
pin to Function Board
One's GPIO
G3
pin.
The
ALT PWR EN1
jumper allows users control power from the 3.3V voltage regulator for any Function Board that
is connected to
Function One
when the jumper shunt is connecting
PWR EN1
and Processor Board's GPIO
G6
pin. Moving the jumper shunt to the other side connects the Processor Board's GPIO
G6
pin to Function Board
One's GPIO
G4
pin.
Qwiic and I C
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