nRF9160 DK v1.0.0

Performance measurement mode

The performance measurement mode can be selected by moving the IFMCU DISCONN switch (SW6) to the right position, which disconnects the interface MCU from the nRF9160 System in Package (SiP) using analog switches.

This is done to isolate the nRF9160 SiP as much as possible and can be of use when measuring currents on low-power applications.

Figure 1. nRF9160 DK performance measurement mode
nRF9160 DK performance measurement mode

The Development Kit (DK) detects if there is a USB cable plugged in (see USB detect) and will disconnect and power down the interface MCU when another supply than the USB is used. If the USB connector is used for power supply only (USB battery back) you can also disable the interface MCU using SW6.

USB detect and SW6 also control the routing of the RESET signal from the RESET button (SW5). Normally, it is routed through the interface MCU, but if that is disabled, the reset button will be routed directly to the nRF9160 SiP.

There are also a number of other reset routing options available through the use of solder bridges: