I have the STM32L475 working in STOP2 wake up as WFE based on the RTC. I would now like to add in an external interrupt source (WFI). There doesn't appear to be a way to use both a WFI and a WFE as wake up. The only way I could see would be to have an external clock provide similar timing as the RTC, but that would defeat a lot of the low power benefits. Is there anyway the RTC wake up can be gated with an external signal?
