nRF52840 examples with LFRC and calibration?

[samsam]

I am designing a custom board with a nRF52840 module that has no 32.768 kHz crystal embedded in it and as a first step want to test it with some examples that use only RC LFCLK.

The Blinky example doesn’t have any clock configured in the sdk_config.h (even the section for such configuration is missing), so can I assume that this example uses LFRC as it declared as default source  in the documentation?

Which other examples use LFRC and is there any example with a calibration?

Thanks

[Vidar Berg]

Maybe you have implemented it already, but I've modified the RTC example as I suggested now, see attached below.

0878.SDK17.0.2_peripheral_rtc_w_rcosc.zip

[samsam]

Thanks, will try it soon - still haven't received all the electronic components, but hope this week to start assemble the PCB (step by step with test) and the first step will be only BT module, switch and LED. Then if Ok wil go further incl. 32768 crystal ...

Regards

[Vidar Berg]

No problem. Good luch with the board bring up.