nRF52840 Preview DK v0.9.x

Interface MCU power

The power for the interface MCU is routed through two load switches, one for the VDD supply and one for the USB supply.

Figure 1. Interface MCU power switch
Interface MCU power switch

These switches are controlled by the presence of a USB connected to the interface MCU USB connector (J2), and the state of the nRF only switch (SW6). See section Operating modes for more information. This makes it possible to disconnect the interface MCU from the power domain when not in use.