Could not find core in Coresight setup nRF52840 ?

Dear Members,

I got :

Could not find core in Coresight setup nRF52840 ? with PCA10059, it was working ok before,

Any solution for it ?

Kind regards,

Rixtronix LAB

  • Do you reckon my internal regulator is faulty ? I used external 5V to Vbus, it's still not responding...??

    Regards,

    Rixtronix

  • I can't pinpoint where the fault based on the information provided here.

    What is the VTarget/Vtref pin connected to since it's 3.3 volts? It should be the same as the IO voltage, which you measured to be 2.2 volts

    Connecting ...
     - Connecting via USB to probe/ programmer device 0
     - Probe/ Programmer firmware: J-Link ARM V8 compiled Nov 28 2014 13:44:46
     - Device "NRF52840_XXAA" selected.
     - Target interface speed: 4000 kHz (Fixed)
     - VTarget = 3.313V
  • Hi Vidar,

    thanks for the reply,

    I'm not sure as well, suddenly our PCA10059 is not responding properly,

    I did well before,

    Worse care, we need to replace the chip,

    We want use external supply and see the response,

    Any suggestions ?

    Thanks,

    Kind regards,

    Rixtronix LAB

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