USB detect and interface MCU disable, the two modes of operation of the nRF7002 DK and signal switches are described in the following sections.
USB detect
To detect when USB for the interface MCU is connected, there is a circuit sensing the VBUS of USB connector J2.
Interface MCU disable mode
The interface MCU disable switch disconnects the power supply and LEDs of the interface MCU. It also disconnects the signal lines between the nRF5340 SoC and the interface MCU, using analog switches.
Signal switches
On the nRF7002 DK, multiple analog switches are used to connect and disconnect signals based on different scenarios.