In-circuit debugging for STM32H743 at 1.8V using STLINK-V3SET

[DGold.11]

I see the manual for STLINK-V3SET refers to B-STLINK-VOLT as an orderable part that does the level shifting from 1.8V to 3.3V. However, I cannot find this part available at any distributor (Mouser, DigiKey, etc.). Am I missing something? Can someone help explain how I can do debugging on this chip when operating at 1.8V? I've never had any issues in past when using chips at 3.3V.

[Uwe Bonnes]

You need level translating buffers. For SWD things get complicated as SWDIO is bidirectional. B-STLINK-VOLT may be mentioned by ST, but it seems not available. Look how other debuggers do the translation, e.g. the Bl*ckm*g*c debug probe.

[Linas L]

Hi.

Look at NUCLEO-L433RC-P development board. It has switch for 1.8V and 3.3V operation, and debugger is SWD with somekind bidir level shifter .

https://www.st.com/en/evaluation-tools/nucleo-l433rc-p.html

[DGold.11]

This is helpful. Thank you!