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Re: Nucleo H755ZI-Q: The interface firmware FAILED to reset/halt the target MCU

andrdz25
Visitor

‎2025-07-17 11:27 PM - last edited on ‎2025-07-18 12:14 AM by

Moved from this thread.

Hi

I'm experiencing the same issue that others have reported with the STM32H755ZIT6. Despite following all the suggested solutions step by step from various forum threads, I’m still unable to debug or run code on my Nucleo board.

Every time I try, the board locks, and I have to manually erase the flash by wiring BOOT0 to VDD to recover it.

I'm using the latest version of STM32CubeIDE, and I’ve attached some screenshots of my project setup for reference. I’d appreciate any guidance or additional suggestions you might have.

 M4_Starup.pngM4_Debug.pngproject_ioc.pngM7_startup.pngM7_Debug.pngProp.pngSTMH7_ioc.png

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mƎALLEm
ST Employee

‎2025-07-18 12:16 AM - edited ‎2025-07-18 12:22 AM

Hello @andrdz25 and welcome to the community,

What board are you using? if it is a custom board you need to specify what power configuration that board is configured to.

If it's a Nucleo-H755ZI-Q board you need to set the power config to Direct SMPS instead of LDO:

mALLEm_0-1752823216976.png

And you need to recover the MCU first.

To give better visibility on the answered topics, please click on "Accept as Solution" on the reply which solved your issue or answered your question.
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