EVK BMD-345 - User guide
UBX-19051533 - R01
Hardware description
Page 9 of 27
2.3
Buttons
The evaluation board has four user buttons: Button 1, Button 2, Button 3, and Button 4. All buttons
are active low; they will connect to ground when pressed. The button GPIO pins must be configured
with internal pull-up resistors for proper operation when using the user buttons. The buttons and ESD
protection can be completely removed from the circuit by breaking the associated jumper.
Figure 5: Schematic – User buttons
2.4
LEDs
User LEDs are provided on the evaluation board - two red and two green. An RGB LED is included as
well and can be enabled by changing the position of JLED. LEDs are powered by VIO and are active
low. The GPIO should be enabled for high drive when sinking current for the LEDs. The LEDs can be
completely removed from the circuit by breaking the associated jumper.
Figure 6: Schematic – User LEDs
