Not able to connect to the controller using the st-link v3 mini.

[TejasK]

Hi all,
I am using ST link v3 mini when i try to connect the controller using the st link v3 it is showing as the
Error : unable to get the core ID.

But when i try to connect the controller using the DFU mode.
i am able to connect to the controller and able to program the controller and option bytes are also AA(RDP 0)>.
 

What is issue why i am not able to connect to the mcu using the St link (SWD) but able to connect to the controller using the DFU mode.
is there anything i have to make changes in the cube programmer.
 

[Andrew Neil]

You haven’t said what controller, or what board it’s on

 

 

See also:

 

[TejasK]

I am using the STM32f407vet6 controller.

[Andrew Neil]

and what board is it on?

 

 

[AScha.3]

Hi,

You need to have reset connected; and then BOOT0 low ; 

then try to connect :  hw-reset + under reset - >

 

[TejasK]

I tried this also still it is showing 
error: unable to get the core ID

I figured it that the clk pin is still 3.3v.
the SWCLK pin  is internally got damaged.
Maybe because of 2 reasons the SWCLK got damaged
1. i think because of the ESD surge.
2. Vdd is also next to the clk in the controller may

Thank you.