woken up again. Because only select peripherals are still active during sleep mode, the system will only wake-up in response to
specific trigger(s).
By default, pressing and releasing the SW0 pushbutton located on the back of the kit will reawaken the kit.
Figure 36. Wake-up from low-power mode (SW0 press)
The screen will immediately power back on once the button is pressed and released. Once the RGB camera feed begins showing
up on the display, the 3D Smart Lock application is ready to recognize faces once again.
6.1.2 PIR sensor
The DIP Switch SW8 is located near the display and controls the wakeup source(s) for the processor. By default, it is configured
to respond to the SW0 pushbutton and the QN9090 BLE (DIP switch configuration 1001).
Some combinations may generate unwanted behavior, refer to the Hardware Guide to identify the supported
wake-up configurations.
CAUTION
Figure 37. DIP switch SW8 to select the wake-up source
The SLN-VIZN3D-IOT kit also embeds a PIR sensor capable of waking the system when motion is sensed. To activate the PIR
sensor (and disable the SW0 pushbutton and QN9090 BLE wake-up sources), change the configuration of the SW8 DIP Switch
from 1001 to 0100.
NXP Semiconductors
Additional features
SLN-VIZN3D-IOT Kit User Guide, Rev. 0, 01 November 2021
User Guide
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