STM32L151CB Hardware RTC issue

arulprabhu · ‎2014-03-16

Posted on March 17, 2014 at 05:53

Hi clive

I am using STM32L Harware RTC for continuous date and time display.

I found that RTC seconds gets decreased after few hours and display wrong time.

RTC Clock: LSE.

MCU Clock : 4MHz.

Have you observed this issue?

Thanks

Arul

#stm32l-rtc-bug

Tesla DeLorean · ‎2014-03-17

Posted on March 17, 2014 at 13:08

Have you observed this issue?

No, I'm not using the STM32L1 parts in current designs.

I guess I'd start by looking at the electrical characteristics/specifications of the chosen crystal, and the circuit design/topology.

I'd look at the prescaler settings, and look at the clock via MCO (if available there on L1 parts).

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