STLINK-V3PWR Connection to legacy targets

Clyde_S · ‎2024-12-09

How does one connect the STLink debug port to an older target with 0.025 square posts on 2.54 mm ptch for the debug connections? As best I can tell, the supplied cables only support 1.27 mm pitch,

KevinA · ‎2024-12-10

I finally got around to using my STLINK-V3PWR or trying. The issue is lack of thought on STM side, one simple adapter like all those ARM adapters but with a 10 pin 1.27mm pitch connector instead of the 2.0mm pitch they have. I purchased the V3PWR since it has a type C connector instead of the micro USB connector and all the power stuff my standalone power board does but with a case. I think I'll have to make a cable, after hunting for several hours I see no solutions. I had one of these https://bit.ly/4g6lPst laying around, with some soldering and crimping it's a start. A real solution would be a bundle like this https://bit.ly/3D9dA0l with a 1.27mm pitch 10 pin instead of the 2mm pitch 10 pin connector.

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Andrew Neil · ‎2024-12-09

Just a simple pinout adaptor.

eg, something like this will get you from 1.27mm to 0.1" (2.54mm):

https://www.mouser.co.uk/ProductDetail/Aries-Electronics/LCQT-MSOP10

Clyde_S · ‎2024-12-09

I have older target boards with a 6-pin header for the ST-Link. They are 0.025 inches square and on 0.1 inch centers. This would connect up directly to the ST-Link provided by Nucleo boards.

This new debugger seems to only support 1.27 mm pins on 1.27 mm pitch with the supplied connector.

Andrew Neil · ‎2024-12-09

It's just a matter of soldering wires to the appropriate-sized headers.

With SWD, it's only 5 wires.

Clyde_S · ‎2024-12-09

I get that. It is not convenient to be soldering onto several boards.

Does a connectorized solution not exist?

Andrew Neil · ‎2024-12-09

I would use something like the above to break out the 1.27mm connection to more convenient 0.1", then wire from that to a mating header for your board(s)

Clyde_S · ‎2024-12-09

Of course I can design a breakout board to do this.

I would like to purchase a readymade solution if such an item exists.

Clyde_S · ‎2024-12-09

Or, let me state the problem a different way. What If I disconnect the Jumpers on CN3 of a STM32F4-DISCO1 board and want to connect this ST-LINK to the board instead.

Andrew Neil · ‎2024-12-10

Maybe something like these?

https://www.mouser.co.uk/ProductDetail/Olimex-Ltd/ARM-JTAG-20-10

https://www.mouser.co.uk/ProductDetail/Segger-Microcontroller/80602

https://uk.rs-online.com/web/p/development-tool-accessories/1311329

They cite J-Link, but the 20-pin header is pretty standard?

Clyde_S · ‎2024-12-10

The first and last item on the list may be what will work. (The links are dead here in the US.)

One would think that ST would have given legacy hardware interconnects some thought in the design of this probe.

Thank you.