User's Manual

6.3.2 External regulated source
The nRF52840 Dongle can also be configured to be supplied from an external regulated 1.8–3.6 V
sourcethrough the VDD OUT connection point. To enable this, SB2 must be cut and SB1 must
be soldered.
6.4 Buttons and LEDs
The nRF528540 Dongle is equipped with a green LED (LD1), a multicolor RGB LED (LD2), a
userconfigurable button (SW1), and a reset button (SW2).
The LEDs and buttons are connected to dedicate I/Os on the nRF52840 SoC.
Figure 8: nRF52840 Dongle buttons and LEDs