LFCLK output for BLE use

Hi,

user87720 said:

Is there any way I could output this clock for BLE LFCLK into an nRF52?

This is not recommended. And there is no way to directly use the LFXO of the nrf9160 as a output. 


You can read about clock management in the PS section 5.4: https://infocenter.nordicsemi.com/topic/ps_nrf9160/pmu_oscillators.html?cp=2_0_0_4_3 

And here : https://infocenter.nordicsemi.com/topic/ps_nrf9160/clock.html?cp=2_0_0_4_6_1_0_19#register.LFCLKSTAT 

user87720 said:

Or is my assumption about the LFXO being enabled most of the time false?

The LFXO on time will be determined by the application, but also if the 9160 will be put in system off mode or not. So for many applications it will be on most of the time. 


 Regards,
Jonathan

Hi,

user87720 said:

Is there any way I could output this clock for BLE LFCLK into an nRF52?

This is not recommended. And there is no way to directly use the LFXO of the nrf9160 as a output. 


You can read about clock management in the PS section 5.4: https://infocenter.nordicsemi.com/topic/ps_nrf9160/pmu_oscillators.html?cp=2_0_0_4_3 

And here : https://infocenter.nordicsemi.com/topic/ps_nrf9160/clock.html?cp=2_0_0_4_6_1_0_19#register.LFCLKSTAT 

user87720 said:

Or is my assumption about the LFXO being enabled most of the time false?

The LFXO on time will be determined by the application, but also if the 9160 will be put in system off mode or not. So for many applications it will be on most of the time. 


 Regards,
Jonathan