Clocking RTC from HSE

[echelon2010]

Posted on October 15, 2015 at 15:17

Hello. I use STM32F429 controller with 12MHz HSE oscillator. Is it posible to clock RTC from HSE while controller supplied from VBAT pin only?

[waclawek.jan]

Posted on October 15, 2015 at 15:25

No. Only LSE is in the VBAT power domain. Read PWR chapter in RM.

JW