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J
JKW
Associate II
May 7, 2024
Solved

the pin to pin compatible part of stm32f103vet6?

  • May 7, 2024
  • 3 replies
  • 3660 views

Hi,

I'm using stm32f103vet6 in my design, but due to the limit power budget, the MCU consumes much power(60mA per MCU , while I used 2 chips in my design), result in frequently triggering over current protection. Is there pin to pin compatible STM32L series part which could be utilized to replace the original one, so that I don't have to make hardware change?

Thanks.

This topic has been closed for replies.
Best answer by STOne-32

Dear @JKW , all,

 

My contribution to the thread - best replacement is STM32L4 series for both pin-to-pin compatibility with a 99% match to not say 100% ( due to the NC pin) just to wire to VDD - and will solve the power consumption as L4 series is on our best in class Cortex-M4 at 80MHz ULP line .

IMG_7879.jpeg

here LQFP100 column matters to migrate from F1 to L4.

Ciao

STOne-32

3 replies

Tesla DeLorean
Tesla DeLorean
Guru
May 7, 2024

Doesn't CubeMX have a method of showing pin compatibility? 

Tips, Buy me a coffee, or three.. PayPal Venmo (See Profile) Up vote any posts that you find helpful, it shows what's working..
    J
    JKWAuthor
    Associate II
    May 7, 2024

    Thanks for the hit. I tried it in CubeMX, there are quite a few compatible part . But I still have question for below:

    JKW_0-1715083147060.png

    If I deselect the 3 options, there is none candidates.

    Tesla DeLorean
    Tesla DeLorean
    Guru
    May 7, 2024

    Pin-for-Pin compatibility is a battle ST's frequently lost.

    The 144-pin device tending to be the least problematic.

    The F1 series is very old, it's the first STM32 family, and ST learned some things. So there's usually now VCAP pins for the LDO, and some movement in the VDD/VSS pins, and a lot more flexibility in the peripheral pin mux/escape method. So there might be smaller parts that can get the functionality you need. Would look at G0 and C0 offerings.

    The L series expect to be battery powered, all the time, and suspended, so they lack a different/separate VBAT pin

    My expectation is that you'll have to spin the board, but changes might only need to be localized to the MCU and rearranging a handful of pins.

    Tips, Buy me a coffee, or three.. PayPal Venmo (See Profile) Up vote any posts that you find helpful, it shows what's working..
    mƎALLEm
    mƎALLEm
    ST Technical Moderator
    May 7, 2024

    Hello,

    You can use CubeMx tool / and cross Selector menu for that purpose:

    SofLit_0-1715082869164.png

    For more details, refer to that knowledge base: https://community.st.com/t5/stm32-mcus/how-to-find-compatible-devices-for-an-mcu-stm32g473cb-as-example/ta-p/49636

     

    To give better visibility on the answered topics, please click "Best answer" on the reply which solved your issue or answered your question.
    J
    JKWAuthor
    Associate II
    May 7, 2024

    It's quite helpful. Thanks a lot.

    Further question,  how can I evaluate the MCU power consumption if I change the STM32F to STM32L?

    thanks.

    mƎALLEm
    mƎALLEm
    ST Technical Moderator
    May 7, 2024

    Watch that video on Youtube: https://www.youtube.com/watch?v=gxvkgkJjI5A

    Or refer to MCUs respective datasheets.

    To give better visibility on the answered topics, please click "Best answer" on the reply which solved your issue or answered your question.
      STOne-32
      STOne-32Best answer
      ST Technical Moderator
      May 7, 2024

      Dear @JKW , all,

       

      My contribution to the thread - best replacement is STM32L4 series for both pin-to-pin compatibility with a 99% match to not say 100% ( due to the NC pin) just to wire to VDD - and will solve the power consumption as L4 series is on our best in class Cortex-M4 at 80MHz ULP line .

      IMG_7879.jpeg

      here LQFP100 column matters to migrate from F1 to L4.

      Ciao

      STOne-32

        J
        JKWAuthor
        Associate II
        May 8, 2024

        Dear @STOne-32

        question for the PIN NO.73, because the board assembled MCU is already there, but it;s  NC pin in STM32F1 while it is VDD pin in STM32L4. In my board the NC pin is a no connection design, so I replace the  chip with STM32L4, will it work, missing a VDD power supply?

        mƎALLEm
        mƎALLEm
        ST Technical Moderator
        May 8, 2024

        You need to connect that VDD pin otherwise you may face some issues.

        To give better visibility on the answered topics, please click "Best answer" on the reply which solved your issue or answered your question.
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