IF Boot/reset button on nRF5340 PDK

The nRF5340 PDK is equipped with an IF Boot/Reset button (SW5).

This button is connected to the interface MCU on the Preview Development Kit (PDK) and has two functions:

Resetting the nRF5340 System on Chip (SoC).
Entering bootloader mode of the interface MCU.

The button is also used to enter the bootloader mode of the interface MCU. To enter the bootloader mode, keep the reset button pressed while powering up the PDK until LED5 starts to blink. You can power up the PDK either by disconnecting and reconnecting the USB cable or by toggling the power switch (SW8).