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Associate II
November 12, 2025
Question

STM32U575 Clock Configuration confusion

  • November 12, 2025
  • 2 replies
  • 315 views

Hi team.

I am using STM32U575RIT6  how set the internal and external clock configuration , i have bit confusion can u gide me to resolve this .

thnaks.

2 replies

Andrew Neil
Super User
November 12, 2025

What's the confusion?

Have you tried using CubeMX ?

A complex system that works is invariably found to have evolved from a simple system that worked.A complex system designed from scratch never works and cannot be patched up to make it work.
Technical Moderator
November 12, 2025

Hello @HA2375- 

You can start your project with STM32CubeMX for graphical clock setup.

So, in the Pinout & Configuration view, access the RCC mode panel to enable required clocks, and check the clock setup in the "Clock Configuration" tab.

Make sure to follow the hardware recommendations for crystal placement and board layout described in the User Manual of your board.

How to calibrate the STM32's real-time clock (RTC) - STMicroelectronics Community

"When your question is answered, please close this topic by clicking ""Accept as Solution"".ThanksImen"
HA2375-Author
Associate II
November 14, 2025

@Imen.D @Andrew Neil   Which port we can use for the External Clock and ,we are not using RTC clock. Can you please suggest the clock selection Hardware point of view . is it correct attached image?

HA2375_0-1763120125628.png

 it

Andrew Neil
Super User
November 14, 2025

@HA2375- wrote:

Which port we can use for the External Clock  it


Have you studied the device datasheet ?

That will show you the available external clock options.

 

See also:

Application note AN5373Getting started with STM32U5 MCU hardware development.

A complex system that works is invariably found to have evolved from a simple system that worked.A complex system designed from scratch never works and cannot be patched up to make it work.