STM32CubeProgrammer Error: No STM32 target found - NUCLEO-H7A3ZI-Q

[patelshre_21]

Hello,

I'm encountering a connection error with STM32CubeProgrammer when trying to connect to my NUCLEO-H7A3ZI-Q board.

**Error Details:**
- Error: "No STM32 target found! If your product embeds Debug Authentication, please perform a discovery using Debug Authentication"
- Board: NUCLEO-H7A3ZI-Q
- STM32CubeProgrammer version: v2.19.0
- OS: Windows 64-bit
- ST-LINK SN: 001C004330325115373336
- ST-LINK FW: V3J15M7
- Board Voltage: 1.22V

**What I've tried:**
- Checked USB cable connection
- Verified ST-LINK drivers installation
- Tried different USB ports
- Board appears to be detected (shows serial number and firmware)

**Question:**
How can I resolve this "No STM32 target found" error? Is the 1.22V voltage reading normal, or could this indicate a power issue?

Any help would be greatly appreciated!

Best regards

[TDK]

1.22 V is insufficient power. The ST-Link chip appears okay since it is detected, but the STM32H7 chip appears to have insufficient power. Download the schematic and trace power on the board to see what is damaged and fix it.

[Andrew Neil]

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@TDK wrote:

Download the schematic and trace power on the board to see what is damaged and fix it.

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Could also be a misconfiguration? The board has several powering options ...

@patelshre_21 Check in the User Manual and/or the schematics that you have the board correctly configured

[Andrew Neil]

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@patelshre_21 wrote:

- Board appears to be detected (shows serial number and firmware)

---

Indeed, but that's just the connection from the PC to the ST-Link.

So the problem is somewhere beyond the ST-Link ...

How to solve connection errors when connecting and programming the STM32 target board.

How to solve debugger connection issues

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