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E
EMRandone
Visitor II
January 15, 2025
Question

How to configure RTC_WUT_S wake-up source of WKUP6 event on STM32U545?

  • January 15, 2025
  • 1 reply
  • 526 views

Dear Sirs,

I would like to wake-up the STM32U545 using a WKUP6 event and the RTC_WUT_S source event.

I'm absolutely not an expert, and this is the first time that I try to wake-up the MCU.

I have not found any information on how to set the RTC_WUT_S register.

Also, what does the "_S" stand for?

Could you please help?

Thank you,

Enrico.

1 reply

I
Imen.D
ST Technical Moderator
January 16, 2025

Hello @EMRandone ,

This article describes how to use an RTC as a wake-up source:

How to use the RTC in STM32 microcontrollers for p... - STMicroelectronics Community

Regarding the "_S" suffix, it is for "secure" indicating that the register or feature is related to the secure domain. 

So, If the RTC is secured, it use the WKUP6.

 
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