How to use internal LFCLK?

[roger.k]

Hi. I'm using nrf52832. Now I'm using HFXO, LFXO to operate BLE. As I know I should use HFXO to operate BLE. What about LFXO? Can I use internal clock(LFRC RC osc) instead of LFXO? I really want to remove 32.768kHz X-tal. If yes, how can I turn on LFRC block in my source code? And what about current consumption or other performance? Does it have any difference?

I need your help.

[RK]

Come on now - you really need to use the search box. This is also discussed constantly and there are examples for it. Yes you can use internal LF oscillator, just set the right define for the LF clock source when you start the BLE stack and it will start the LF RC and keep it calibrated.

[bjorn-spockeli]

If you're using SDK v14.0.0 then you need to modify the sdk_config.h file as described in this answer.

If you're using SDK v13.0.0 or older then you need to modify the NRF_CLOCK_LFCLKSRC define in pca10040.h as described in this answer.

Best regards

Bjørn

[roger.k]

Thank you very much for your help.