I am working on RTC with stm32f746g controller. I tried number of option but i am not getting accurate time.
After some time rtc is getting lag of 4 to 5 seconds and it keep on lagging in time.
I am using 32.768khz exteranl crystal with 24pf capacitors.
I tried by changing this capacitors value 22pf,15pf,10pf also but still my problem is not solved.
I did internal rtc calibration also to minimize this error by changing prescaler values but still i am getting time lag.
Can anyone suggest me any other option which will work out and i will get accurate time?