EVENTS_LFCLKSTARTED event when using external LF clock source

[Mindaugas Tinteris]

I am using clock signal from external RTC chip to clock NRF52832 at 32768 Hz through XL1 leaving XL2 floating. I have verified the waveform by the oscilloscope and set SRC to 1, BYPASS to 1 and EXTERNAL to 1 in LFCLKSRC register, but there still is a problem that device hangs in a loop inside softdevice code, in a place where it waits for EVENTS_LFCLKSTARTED event.

Is EVENTS_LFCLKSTARTED event still generated even when using external LF clock source instead of XTAL? Or maybe it is a flaw in softdevice's logic?

[Mindaugas Tinteris]

Small update: our hardware engineer tried different approaches and found out, that system starts normally only when external CLK signal is routed to both XL1 and XL2 simultaneously. All other configurations, described in the datasheet doesn't work. How could it be? Is there some error in the datasheet?