how to use CLOCK_LFCLKSRC_SRC_RC?

[frank zhang]

I check the function spec that we can use use 32kHz RC as LFCLK, so I have no external 32k crystal connected with XL1/XL2 on my board. I have set
NRF_CLOCK->LFCLKSRC = (CLOCK_LFCLKSRC_SRC_RC << CLOCK_LFCLKSRC_SRC_Pos); And SOFTDEVICE_HANDLER_INIT(NRF_CLOCK_LFCLKSRC_RC_250_PPM_TEMP_8000MS_CALIBRATION, false);

I found that if I start a repeated timer that the interval is APP_TIMER_TICKS(x, APP_TIMER_PRESCALER) (Here x is less than 50), my system will power off soon. Can you let me know what is wrong I did? Thanks Frank

[frank zhang]

Here I have found the root cause. It is nothing to do with LFCLK, It is just because that I set a test point which will triggle gpio connecte power LDO circuit. Thanks a lot.