Skip to main content
HL1
Associate
January 31, 2025
Solved

STM32f411 crystal

  • January 31, 2025
  • 1 reply
  • 536 views

Hi,

I am new with stm32F411 mcu, and i have a question. if i want to use RTC features, do i need to add an external 32.768kHz xtal ?

Thanks.

This topic has been closed for replies.
Best answer by TDK

No, technically. You can use the internal LSI or the divided down HSE clock. However, the LSI clock is not very accurate and the HSE clock uses a lot of power.

But typically, an LSE crystal is used as it allows the chip to go into a very low power state while still running the RTC.

TDK_0-1738295774157.png

 

1 reply

TDK
TDKBest answer
January 31, 2025

No, technically. You can use the internal LSI or the divided down HSE clock. However, the LSI clock is not very accurate and the HSE clock uses a lot of power.

But typically, an LSE crystal is used as it allows the chip to go into a very low power state while still running the RTC.

TDK_0-1738295774157.png

 

"If you feel a post has answered your question, please click ""Accept as Solution""."
    Terms & ConditionsAccessibility statement