Interface MCU firmware on nRF52 DK

The onboard interface MCU is factory programmed with an Mbed™-compliant bootloader. This feature makes it possible to swap interface firmware between the factory preloaded SEGGER J-Link Onboard (OB) and the Mbed interface firmware.

See Reset button for instructions on how to enter the bootloader mode.

To swap interface MCU firmware, drag the Interface image (.bin) into the mounted bootloader drive on the connected computer and power cycle the DK.

Both the Mbed interface firmware and the J-Link OB image can be downloaded from www.nordicsemi.com.

Note: When in bootloader mode, do not drag and drop any files except those downloaded from www.nordicsemi.com for use with the interface MCU. If a wrong file is used, it can overwrite the bootloader and ruin the interface MCU firmware without the possibility of recovery.