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SOFTDEVICE NOT WORKING ON FEW BOARDS

arshdeep

Hi,

We recently received our 30 prototype boards with nrf52840 chip on it. 28 boards are working fine but in other 2 boards softdevice is not working. Any ble_peripheral SDK example with softdevice is not working but the peripheral examples without softdevice are still working fine. 

Because the examples without softdevice are working I don't think it's a chip solder issue. Could there be a issue in chip itself? or how do i find out what the issue is? 

Please suggest!! 

Thanks,

Arshdeep  

  • 0

    Hey Arshdeep,

    It's most likely a faulty 32kHz crystal oscillator, either due to the crystal being out of spec, improper soldering, or incorrect capacitive loading of the crystal.

    If you're not using an external 32kHz crystal oscillator and you rely only on the internal 32kHz RC oscillator then you need to make sure your 32kHz oscillator accuracy is set to 500PPM. 


    "Any ble_peripheral SDK example with softdevice is not working but the peripheral examples without softdevice are still working fine."
    Can you give us more details on the symptoms of your issue? 

    Cheers,

    Håkon

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