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hafiqat_
Associate II
March 24, 2025
Solved

How connect SWDIO?

  • March 24, 2025
  • 2 replies
  • 1005 views

Hello. I was recently advised that STM32F103C8T6 and STLINK-V3MINIE should be soldered directly without an adapter.

VCC with 3V3
GND with GND

SWDCLK with CLK

SWDIO with ?

Best answer by TDK

> I was recently advised that STM32F103C8T6 and STLINK-V3MINIE should be soldered directly without an adapter.

This is not true. Using CN4 and a cable to a header on the board is the most common and often the best method.

> SWDIO with ?

SWDIO should be connected to pin 3, "TMS".

TDK_0-1742841405770.png

 

2 replies

TDK
TDKBest answer
Super User
March 24, 2025

> I was recently advised that STM32F103C8T6 and STLINK-V3MINIE should be soldered directly without an adapter.

This is not true. Using CN4 and a cable to a header on the board is the most common and often the best method.

> SWDIO with ?

SWDIO should be connected to pin 3, "TMS".

TDK_0-1742841405770.png

 

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    H
    hafiqat_Author
    Associate II
    March 25, 2025

    > Using CN4 and a cable to a header on the board is the most common and often the best method.

    I don't understand what CN4 is. Is it some kind of adapter? If so, what does it look like?

    Andrew Neil
    Andrew Neil
    Super User
    March 25, 2025

    Again, see the User Manual:

    AndrewNeil_0-1742936169086.png

    It's a 14-pin header which mates with a standard ribbon cable.

    AndrewNeil_1-1742936275273.png

    AndrewNeil_2-1742936329907.png

    AndrewNeil_3-1742936384869.png

     

     

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      Peter BENSCH
      Peter BENSCH
      Technical Moderator
      March 24, 2025

      @hafiqat_ However, you should be aware that you should buy the STM32F103C8T6 from authorised sources, otherwise the risk of getting counterfeits is almost 100%.

      Problem: STMicroelectronics and its software cannot support them, which is why problems regularly occur when debugging and working (very often found here in the community). In such a case, you would have to contact the dealer or the manufacturer of the counterfeit.

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