AnsweredAssumed Answered

32K crystal can't generator RTC clock

Question asked by Li Feng on Jul 19, 2017
Latest reply on Oct 31, 2017 by Kerry Zhou

MKE18F512VLL16, the 32k crystal can't generator rtc clock. 


add a 1M resistance between PTC3 and PTC2, the PTC3 wave is 

The PTC2 have no wave.


I had a TWR_KE18F  board,it not install the cap and resistance ,and the wave is well, why?


If  get rid of the cap and resistance in my board ,the wave frequency is 1.4M, and the amplitude is very low.


The same code download to the TWR_KE18F , the RTC wave is well, so the problem is not the code.