STM32CubeProg: No STM32 target found on ST-LINK

[FSkro.1]

I have a board (MCU: STM32H7B3LIH6Q) that I've been trying unsuccessfully to connect to using an external J-Link module, and recently I've switched to the internal ST-Link debugger. However, when I try to connect on STM32CubeProg for software reset, I get this output:

 16:55:24 : ST-LINK SN : 0035002E3438510534313939
 16:55:24 : ST-LINK FW : V3J8M3
 16:55:24 : Board : STM32H7B3I-DK
 16:55:24 : Voltage : 3.28V
 16:55:24 : No STM32 target found!
 16:55:24 : ST-LINK SN : 0035002E3438510534313939
 16:55:24 : ST-LINK FW : V3J8M3
 16:55:24 : Board : STM32H7B3I-DK
 16:55:24 : Voltage : 3.28V
 16:55:24 : Error: No STM32 target found!

For hardware reset, I get the following:

 16:54:40 : ST-LINK SN : 0035002E3438510534313939
 16:54:40 : ST-LINK FW : V3J8M3
 16:54:40 : Board : STM32H7B3I-DK
 16:54:40 : Voltage : 3.28V
 16:54:41 : ST-LINK error (DEV_CONNECT_ERR)
 16:54:41 : ST-LINK SN : 0035002E3438510534313939
 16:54:41 : ST-LINK FW : V3J8M3
 16:54:41 : Board : STM32H7B3I-DK
 16:54:41 : Voltage : 3.28V
 16:54:41 : Error: ST-LINK error (DEV_CONNECT_ERR)

[Houda GHABRI]

Hi @FSkro.1​ ,

Can you please try to connect under reset and tell me if it is Ok?

 

Houda

[FSkro.1]

Under reset or in power down mode I get the following:

 09:06:08 : ST-LINK SN : 0035002E3438510534313939
 09:06:08 : ST-LINK FW : V3J7M2
 09:06:08 : Board : STM32H7B3I-DK
 09:06:08 : Voltage : 3.28V
 09:06:09 : ST-LINK error (DEV_CONNECT_ERR)
 09:06:09 : ST-LINK SN : 0035002E3438510534313939
 09:06:09 : ST-LINK FW : V3J7M2
 09:06:09 : Board : STM32H7B3I-DK
 09:06:09 : Voltage : 3.28V
 09:06:10 : Error: ST-LINK error (DEV_CONNECT_ERR)

[VTaya.1]

Hi

I Have faced the same issue. Pull up boot pin of controller to 3.3v, reconnect your device with boot pin pull up. And try connecting to smt32cubeProgrammer.

It worked for me.

[FSkro.1]

I've been trying booting up from flash and sys mem in alternation, but both produce the same output.