nRF52832 The problem about the use of 32MHz crystal in Bluetooth

[durthyang]

Hello, we are using the nRF52832 for building our custom board.After loading the example bluetooth_uart code given in the SDK, our board is not producing correct RF(Bluetooth advertisement) which is different from what is generated in the development kit(nRF52).

As is observed, the bluetooth application is switching between the external 32MHz crystal and internal for the power saving purpose. We suspect this feature may result in our bluetooth problem. So, is there any way we can keep every chip function running permanently from the standard 32MHz crystal ? we do not need any Power Saving features. We have 10 kilowatt battery.

[FormerMember]

What is the load capacitance of the crystal? And what is the values of the load capacitors in the layout? The value of the load capacitors should be calculated according to the formula in the "Crystal and load capacitors" section in this tutorial.

 

Does you application start, so that you can print over UART? If not, I would recommend you to check the LFCLK source as well. All examples in the SDK use an external 32 kHz crystal, if your board doesn't have an external crystal, the internal RC oscillator should be used instead.