Is there a problem with the nrf52840 schematic?

NRF_CLOCK->TASKS_HFCLKSTART = 1;
while (NRF_CLOCK->EVENTS_HFCLKSTARTED == 0);
NRF_CLOCK->EVENTS_HFCLKSTARTED = 0;

I finally figured out the problem with my custom board
I think it's a HFXO clock problem. It doesn't go any further with the above code
I've read a lot of articles and the cause could be crystal, capacitor, footprint, or soldering problem
I've checked everything
I've removed the crystal and capacitor from the working board and used them to solve the crystal and capacitor problem and also checked the footprint several times
I've also checked the soldering several times and I've used it with nrf52832 without any problem
So I'm providing the schematic
Is there anything wrong with the schematic?
I know it's annoying, but could you please check it?
Thank you very much for your kind reply as always.

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  • Hi Kim,

    We usually recommend using the values and components in the reference schematic exactly in your design. The component values seem a bit different from the values that are mentioned in the reference.

    You also seem to be missing a 15uH series inductor at the DCC pin. 

    There are also places where the 4.7uF cap seems to be missing or replaced with other values.

    Regards,

    Priyanka

Reply
  • Hi Kim,

    We usually recommend using the values and components in the reference schematic exactly in your design. The component values seem a bit different from the values that are mentioned in the reference.

    You also seem to be missing a 15uH series inductor at the DCC pin. 

    There are also places where the 4.7uF cap seems to be missing or replaced with other values.

    Regards,

    Priyanka

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