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nRF52840 bootloading

Shaked Aharon

Hello,

I designed a PCB using nRF52840 for controlling the board.

I have physical access to the following pins : SWDIO, SWDCLK , VSS , VDD , nRESET.

What is the boot loading sequence for the first time boot ?

Please guide me on the steps for the first time bootloading.

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    Hi Shaked,

    I assume you are asking about how to program the chip ? If you are, you just need to connect: SWDIO, SWDCLK , VSS to the programmer. You can use a nRF52 DK as the programmer as well. Just need to use the debug out port (You need to connect the VDDdetect pin so that the DK know that it will have to use the Debug out port). Or it's easier to just use a separate programmer, for example Jlink Base as Anthony suggested. 
    After you have them , you can use nRF Connect for Desktop app -> Programmer to program or you can use nrfjprog.exe command line tool. 

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  • 0

    Hi Shaked,

    I assume you are asking about how to program the chip ? If you are, you just need to connect: SWDIO, SWDCLK , VSS to the programmer. You can use a nRF52 DK as the programmer as well. Just need to use the debug out port (You need to connect the VDDdetect pin so that the DK know that it will have to use the Debug out port). Or it's easier to just use a separate programmer, for example Jlink Base as Anthony suggested. 
    After you have them , you can use nRF Connect for Desktop app -> Programmer to program or you can use nrfjprog.exe command line tool. 

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