STM32H745 Not Connecting - "No STM32 Target Found" Error

[Harsh_Gajjalwar]

I am facing an issue where my STM32H7 board is not detected using STM32CubeProgrammer. I am using an STLINK-V3SET programmer, and the following error keeps appearing:

Error log:

17:04:59 : UR connection mode is defined with the HWrst reset mode
17:04:59 : ST-LINK SN : 0028001E3233510739363634
17:04:59 : ST-LINK FW : V3J13M4B5S1
17:04:59 : Board : STLINK-V3SET
17:04:59 : Voltage : 3.29V
17:04:59 : Error: No STM32 target found! If your product embeds Debug Authentication, please perform a discovery using Debug Authentication

17:06:59 : UR connection mode is defined with the HWrst reset mode
17:06:59 : ST-LINK SN : 0028001E3233510739363634
17:06:59 : ST-LINK FW : V3J13M4B5S1
17:06:59 : Board : STLINK-V3SET
17:06:59 : Voltage : 3.29V
17:06:59 : Error: No STM32 target found! If your product embeds Debug Authentication, please perform a discovery using Debug Authentication

Setup Details

1. Board: STM32H745xi series
2. Debugger: STLINK-V3SET
3. Software: STM32CubeProgrammer 
4. Voltage: 3.3V confirmed

Any help or suggestions would be greatly appreciated. Thanks in advance!

[Andrew Neil]

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@Harsh_Gajjalwar wrote:

 my STM32H7 board 

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What board?

Please give details; also versions, etc: How to write your question to maximize your chances to find a solution

[TDK]

Has it ever worked or is this a brand new board/design? Are SWD/NRST pins connected? Show schematic, details.

[SofLit]

Hello @Harsh_Gajjalwar ,

Which HW? ST board or custom board? if ST board, which one? if custom board what power supply are you setting SMPS or LDO?

Becarefull, if you didn't set the correct power supply which needs to be inline with your HW, you broken your board. So you need to recover it with this manipulation: How can I recover my STM32H7 board after facing a power configuration deadlock?