H750 Discovery board - STLINK v3

[BHure.1]

Hello, Got a stm32H750B discovery board and it kills me as i don't fully understand.

I managed to understand a bit with the help of clive, as right now when i try to connect with STLINk v2 on the SWD connection i get a STM32F72X chip recognised (not the board itself).

Is it possible to flash this chip in order to make it the board functional again?

Thanks,

Bogdan

[Tesla DeLorean]

https://community.st.com/s/question/0D53W00000LDcWOSA1/stm32cubeprogrammer-is-not-recognizing-the-board-instead-of-stm32h750-it-says-the-device-is-wrong-as-well-it-says-stm32f72xstm32f73x-although-it-is-stm32h750what-can-i-do

Had you erased the F723?

Does the PC currently recognize the ST-LINK/V3 when plugged into CN14?

[BHure.1]

The F723 seems to be empty.

PC does not recognise the STLINK. when i plug the usb inside the STLK connector, there is no activity - the LD4 should be lighted, but it is dead.

[Uwe Bonnes]

Did you perhaps not remove JP3 and the F723 is still under reset?

[BHure.1]

No, JP3 is unset.

Tried to reset F723 by setting JP3. It is under reset, but still no difference :(.

It is very likely i removed the firmware on F723. Don't know how i managed to do that. Tried several times to force H7 to reset bootloader, however it does not work.

[Uwe Bonnes]

I am quite sure the STLinkV3 bootloader is RDP1 protected. From V37 on, the SWD access to the F723 is closed. Try to access the F723 via CN5 with another adapter.

However I guess you somehow applied voltage above VCC of some F723 pin and that killed the F723...