STM32WB15 cannot connect stlink v2

[Erdincca]

I encounter the following error when connecting STM32WB15 to ST-Link V2.

Error: No STM32 target found! If your product embeds Debug Authentication, please perform a discovery using Debug Authentication

only VDD,GND, and SWIO and SWCLK pins connected..

package is ..UFQFPN48

what is problem..?

[TDK]

• Is this a custom board?
• Are you using STM32CubeProgrammer? Does it output the target voltage? Is that voltage as expected?
• Are you using a genuine programmer? Link to it.

[Andrew Neil]

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@Erdincca wrote:

If your product embeds Debug Authentication,

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Does it?

If 'yes':

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@Erdincca wrote:

please perform a discovery using Debug Authentication

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did you do that?

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@Erdincca wrote:

only VDD,GND, and SWIO and SWCLK pins connected..

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Have you tried adding Reset?

[Erdincca]

yes customboard. i use stm32cubeprogrammer. output voltage 3.3v. original stlink v2 use.. 

[TDK]

Perhaps a schematic error. Perhaps a hardware error.

[Erdincca · Accepted solution]

i solved this problem... Proble is SW Fequency... Low frequency is working..

Thanks..

[Andrew Neil]

@Erdincca  Good to hear it's solved.

Now please mark the solution - so that others who come here with the same problem can find it.