Disconnect 32.768 kHz crystal X1

[Alexander Sanochkin]

We disconnected the 32.768 kHz crystal X1 on the NRF54L15 DK board and the system does not work.

What changes should be done in the code to make system work? Any recommendation is appreciated.

Thanks,

Alexander

[SwRa]

Hi Alexander,

Set CONFIG_CLOCK_CONTROL_NRF_K32SRC_RC=y and CONFIG_CLOCK_CONTROL_NRF_K32SRC_XTAL=n in all relevant configuration files. This tells the system to use the internal RC oscillator instead of the external crystal for the low-frequency clock source. If you need to reclaim P0.00 and P0.01 as GPIOs, refer the directions here: 32.768 kHz crystal 

Best Regards,

Swathy

[Alexander Sanochkin]

Hi Swathy,

Unfortunately we already have these options in our prj.conf. So, the system does not work with CONFIG_CLOCK_CONTROL_NRF_K32SRC_RC=y and CONFIG_CLOCK_CONTROL_NRF_K32SRC_XTAL=n

Could you provide any other recommendations, please?

Thanks,

Alexander

[SwRa]

Hi Alexander,

Could you try if the solution suggested here works: nrf5340 sysbuild LFCLK loop ?

Regards,

Swathy 

[Alexander Sanochkin]

Hi Swathy,

This suggestion helps.

Thank you very much!

Regards,

Alexander