Different HW-Versions of ST-Link/V2

[Eric_Z]

Hello Forum,

recently I bought me a new ST-Link/V2 to program and debug a STM32L4. I tried to connect the programmer with the MCU, but it didn't work. Now I tried it with a different programmer and I could establish a connection to the STM32L4. After that I tried to connect the new programmer with a STM32G0 and this also works.

Version of new programmer: ST-Link/V2 A2020 03

Version of old programmer: ST-Link/V2 B2017 15

Both programmers have the same Firmware Version.

Could anyone please tell me where the error is?

Kind regards

Eric

[Uwe Bonnes]

Carefully and double check all connections, USB cables and USB ports, I do not think there is a real functional difference in both versions.

[Tesla DeLorean]

Are these authentic or clones?

Watch that you're powering pins 1 or 2 with VTarget so as to power the buffers.

[Andrew Neil]

"Are these authentic or clones?"

+1

If you've got cheap clones like this from ebay or the like:

beware that there are at least two different pinouts on otherwise identical-looking products!

EDIT

Here you go:

Click the image to enlarge - Look carefully at the two pinouts!

[Eric_Z · Accepted solution]

Hello,

thank you for your answers. But a few weeks ago I talked to an ST employee and showed him the schematic of the STML4. I forgot the 100 nF capacitor at Reset...

Kind regards

Eric

[Andrew Neil]

Thanks for the update - it would have been helpful if you had said that earlier!

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