the topic is deleted

[nick yong]

the topic is deleted

[Håkon Alseth]

Hi,

 

On boot, it's the HFINT (64 MHz RC oscillator) that is sourcing the system.

The HFXO needs to be explicitly started if your firmware requires it.

The simplest form is like this:

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

 

If you hang in the while-loop, there is likely an issue with your soldering or loading caps.

Please share the xtal used and the value of C19 (and either C18 or C20?).

 

Kind regards,

Håkon

[nick yong]

thanks. I will try . 
I find several code for xtal . I will try.