I have made a customize PCB with STM32L151CBU6 and it's LSE is not running reliably.
LSE only runs when I apply some heat with my hot air station. But after some minutes, the LSE stops and again I need to apply some heat to make it run again.
Can anyone provide me any information about if there is issue with the design or selection of components?
The 32.768KHz crystal I am using is :- FC-135 32.7680KA-AC0
I have tried different values capacitors 6.8pF, 12pF, 15pF, 18pF. But there is same problem with all values.
