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RTC design recommendation

Question asked by Greg73 on Nov 27, 2011
Latest reply on Nov 30, 2011 by Greg73

In my recent design I'd like track the time/date using the RTC peripherial of the STM32L152. If I'm not wrong, the RTC is only active when the MCUs power supply is on. I want the clock to run during powered down periods. How can I do that? Well before I was using external RTC chips equipped with backup battery VBAT power pins - has the STM32L152 VBAT pin or any similar?

Thanks, Greg73