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ST-Link/V2-ISOL not connecting

Question asked by techie.renovo on Feb 8, 2016
Latest reply on Feb 11, 2016 by techie.renovo

I am using STM32F10x controllers in a number of projects and have been programming these with ST-Link/V2 for a couple of years now with no issues at all. I just received a couple of ST-Link/V2-ISOL. These are supposedly drop-in compatible, but both do not successfully connect to the target.

The Windows Device manager shows either of the ST-Link devices connected, so the USB driver should not be an issue. There is no issue with the board, as I can swap the ST-Link and ISOL back and forth, the ST-Link having no issues and the ISOL just not connecting.

I am using SWD through the 20 pin connector, not JTAG.

Is there any difference between the two programmers that I should be aware of, that might cause this. I can't find anything in the documentation that would give me a hint what might be wrong.

Thanks for any ideas.