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Associate II
March 24, 2025
Solved

How connect SWDIO?

  • March 24, 2025
  • 4 replies
  • 1147 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 ?

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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

 

4 replies

TDK
TDKBest answer
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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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
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

 

 

A complex system that works is invariably found to have evolved from a simple system that worked.A complex system designed from scratch never works and cannot be patched up to make it work.
Peter BENSCH
ST 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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