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MarkJordan
Associate
July 28, 2024
Solved

STM32G030F6P6 TSSOP20 crystal oscillator?

  • July 28, 2024
  • 3 replies
  • 1438 views

As I understand, the TSSOP20 version needs an external oscillator instead of a 8MHz crystal connected directly to the MCU pins. Is that correct?

I'm asking because I have seen a board on AliExpress using this same processor with a 8MHz crystal.

    Best answer by TDK

    Correct, the TSSOP20 doesn't have an OSC_OUT which means it can't be hooked up to a crystal directly.

    TDK_0-1722202518903.png

     

    No clue what's going on with that board. Schematic doesn't seem available. Probably the crystal is not very useful on it.

    3 replies

    TDK
    TDKAnswer
    Super User
    July 28, 2024

    Correct, the TSSOP20 doesn't have an OSC_OUT which means it can't be hooked up to a crystal directly.

    TDK_0-1722202518903.png

     

    No clue what's going on with that board. Schematic doesn't seem available. Probably the crystal is not very useful on it.

    "If you feel a post has answered your question, please click ""Accept as Solution""."
      BarryWhit
      BarryWhit
      Lead
      July 29, 2024

      Very curious. a schematic (could be typical AE misinfo) is available but shows no crystal

      https://nl.aliexpress.com/item/1005005574646465.html

       

      There's also a Baidu (Chinese Cloud drive) download link at the top of that page for a zip file of assets for that board, but it seems to be china only.

       

      On at least one unrelated project, someone thought it was a good idea to connect a 16Mhz crystal to OSC32, I wonder if that's a clever hack or a *** mistake: hack.https://github.com/brunohoplite/stm32g030f6p6_evaluation_board/blob/master/PCB/Schematic_stm32g0f0_eval.pdf

       

      Update: really?!? the word *** is censored? that's so ***ing ***. What a bunch of ***.

      "- If someone's post helped resolve your issue, please thank them by clicking ""Accept as Solution"".- Please post an update with details once you've solved your issue. Your experience may help others."
      O
      oxomoxo
      Visitor II
      May 23, 2026

      Definitely a mistake ... Don't ask me how I know ^^ 

      RomainR.
      RomainR.
      ST Employee
      May 23, 2026

      Hi,

      The TSSOP20 versions of the STM32G0 only support an external HSE bypass oscillator on PC14 (OSC_IN), but they can also use a LSE crystal on PC14–PC15 as the SYSCLK source.

      I would be curious to understand the purpose of this 8 MHz crystal on this STM32G030F6 board. I could not find any schematic for this board. Very strange !

      If I were to use this kind of hardware, for a lower price and with slightly better PCB manufacturing quality, I would rather use this instead, especially since the schematics are available online:
      https://github.com/WeActStudio/WeActStudio.STM32G0xxC0xxCoreBoard/tree/master

      Otherwise, here our official reference hardware, which is fully documented and supported by our ecosystem.

      https://www.st.com/en/evaluation-tools/nucleo-g031k8.html

      Best regards,

      Romain,

       

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