Alarm waking up befor 1 Min when after 2 or 3 days

[Kai_Satone]

i am using stm32f41ceu6 with RTC and RCC in that we are using LSE  with 100HZ 
if i set  Alarm  for 1H or more then still working but after 2 or 3 days it wakeup early befor one Min
example i set alarm at 11:30 then it will wakeup after one hour that time after 2 or 3 days wakeup day 11:29
there need of any other calibration or any other solution 
 

[mƎALLEm]

Hello,

You need to calibrate the RTC. Review this article.

[Kai_Satone]

thank you sir