From L475 datasheet and reference manual it was mentioned that the WWDG clock source is from PCLK1. Whether PCLK1 Timer or Peripheral clock is used for WWDG? I couldn't find the details.. Attached reference image from cubeMXThanks

I want to configure the RTC interrupt for every 1s in L475. Since all RTC interrupt are routed through EXTI, is it possible to generate the interrupt periodically without depending on external signal? Something like second interrupt (SECIE) in STM32F...