i need two precise alarms i can set on my STM32F4 which will also be save when only the Backup domain is powered by a small battery. How many alarms can i have on the RTC of STM32F4? What would be my other options?
RTC in STM32F407VG MCU allows to have two alarms: Alarm A and Alarm B. In fact all devices from STM32F4 family have two alarms.
RTC ALARM (Alarm A, Alarm B). For more details, please have a look to the reference manual related to your product.
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