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MPenz.1
Associate
December 22, 2022
Solved

Hi, it's possible to use an external clock of 8Mhz (HSE generated by a crystal) on STM32G0B1KBT6 (LQFP32 pinout) on PC14 or PC15?

  • December 22, 2022
  • 3 replies
  • 1161 views

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Best answer by KDJEM.1

Hi @MPenz.1​,

You can use an External High Speed clock mapped on OSC_IN with HSE in bypass mode.

But not a crystal resonator because which would require OSC_OUT pad to maintain the resonator effect. And the OSC_OUT isn't available with LQFP32 package.

When your question is answered, please close this topic by choosing Select as Best. This will help other users find that answer faster.

Thank you.

Kaouthar

3 replies

KDJEM.1
Technical Moderator
December 22, 2022

Hello @MPenz.1​ and welcome to the Community :),

If you refer to this STM32G0B1 datasheet, and precisely table 12, you can conclude that the PC14-OSC32_IN support the OSC_IN and OSC32_IN for LQFP32 package.

0693W00000WLdUAQA1.pngFor that, you can use the HSE or LSE on PC14.

When your question is answered, please close this topic by choosing Select as Best. This will help other users find that answer faster.

Thank you.

Kaouthar

To give better visibility on the answered topics, please click on Accept as Solution on the reply which solved your issue or answered your question.
MPenz.1
MPenz.1Author
Associate
December 22, 2022

Thanks for the reply. I want to use HSE therefore I need OSC_IN and OSC_OUT. Where I can find OSC_OUT on the LQFP32 package?

KDJEM.1
KDJEM.1Best answer
Technical Moderator
December 23, 2022

Hi @MPenz.1​,

You can use an External High Speed clock mapped on OSC_IN with HSE in bypass mode.

But not a crystal resonator because which would require OSC_OUT pad to maintain the resonator effect. And the OSC_OUT isn't available with LQFP32 package.

When your question is answered, please close this topic by choosing Select as Best. This will help other users find that answer faster.

Thank you.

Kaouthar

To give better visibility on the answered topics, please click on Accept as Solution on the reply which solved your issue or answered your question.
Tesla DeLorean
Guru
December 29, 2022

Other STM32 32-pin devices host CK_IN / OSC_IN on the PA0 pad. Also 20 and 28-pin variants (see L011 for example)

Is this different here, or an oversight in the bond-out ? Rather disappointing..

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