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  • Case ID: 344917
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Unknown device error 9 in nrf programmer

Khodidas11

Hi,

We designed our custom board using nrf54l05, and tried to flash it using segger J-lInk as well as using nrf54L15-DK Debuger out port using nrf connect Programmer utility. we checked and verified connections which are OK, 
but facing issue of error code 9, UNKNOWN Device.

Please Help

Regards

Khodidas

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  • 0

    Hi,

    Can you try to use nRF Command line Tools and do a recover? If it fails, can you add the --log argument and share the log with us?

    Make sure that the device is powered when doing this.

    nrfjprog --recover --log

    best regards

    Jared

  • 0 in reply to Jared

    Already tried this , error throws. It was using nrf54l15-Dk external debugger output port

  • 0 in reply to Jared

    Hi,

    We changed to different system to work and getting same error as per log file. Please check attached waveforms for VDD and RESET. We checked on two different PCBs, and got same result.



    Regards 
    Khodidas

  • 0 in reply to Khodidas11

    Hi,

    Ok, looks like both RESET and VDD is at around 1V8.

    Could you share your schematics and layout?

    Could you also probe the SWD signals and share a trace when you try to run recover command? 

    regards

    Jared 

  • 0 in reply to Jared

    Hi,

    We tried with 1.8 as well as 3.3 both supply and results are same.

  • 0 in reply to Khodidas11

    Can you share your email ID , so that we can share it

  • 0 in reply to Khodidas11

    Hi,

    You can upload the files here, use insert->Image/video/file or drag drop the zip containing the files into the reply box.

    That makes it easier for other engineers to follow up on this case if it becomes necessary later.

    best regards

    Jared 

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