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Visitor II
March 17, 2022
Question

Hi, I designing a new design with STM32L471ZGJ6 MCU. I connected crystal osc S.N. ECS-.327-12.5-1210B-N-TR to PC14, PC15 pins

  • March 17, 2022
  • 2 replies
  • 729 views

Hi,

I designing a new design with STM32L471ZGJ6 MCU.

I connected crystal osc S.N. ECS-.327-12.5-1210B-N-TR to PC14, PC15 pins in MCU.

Is the value of the capacitors I connected correct? (see image below)

Is the connection correct?

0693W00000KczQGQAZ.png 

Thanks,

Mor

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    2 replies

    Graduate II
    March 17, 2022

    Looks okay, keep in mind that you might have to play with the capacitor values, and probably bridge ( = 0 ohms) the resistors.

    But you can't go wrong with having them on the board.

    ST Employee
    March 17, 2022

    Hi,

    Please refer to AN2867 Rev 15 "Oscillator design guide for STM8AF/AL/S, STM32 MCUs and MPUs " section 3.3 Load capacitance illustrated how to calculate the external capacitors.

    Bouraoui