MCO1 an low power mode

[Adalgiso]

Posted on June 03, 2013 at 15:35

Hi,

I want to use MCO1 to control an external device using the LSE RTC crystal 32Khz. Does any body know what is the behaviour of MCO1 in stopped or standby mode for STM32F2 device?

Thanks.

#mco-low-power

[Tesla DeLorean]

Posted on June 03, 2013 at 16:34

The only pins powered via the backup domain are PC13,14,15 these will be the only functional pins when the main regulator switches off, and you have a supply on VBAT.

You'd be better using an external LP RTC which can generate a 32.768 KHz output, and then feed that to the STM32F2, and other device(s)