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Compatibility of STLINK-V3MODS SWD Pins with 3.3V MCU Logic Levels

Shreayas_Acharaya
Associate III

Hello ST Community,

I have a question regarding the compatibility of the STLINK-V3MODS SWD pins with my MCU's SWD pins, which operate at 3.3V. Do I need to use logic level shifters between them, or are the STLINK-V3MODS SWD data signals fully compatible with 3.3V logic levels? Additionally, can I connect them without using logic shifters, and if so, would that be safe for stable operation?

Thank you for your assistance!

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Screenshot 2024-11-05 121157.pngScreenshot 2024-11-04 170301.png

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