ST Link V3 for NUCLEO-H755ZI-Q

[XSMSQ]

Hello everyone, the STM32F723IEK6 chip on my H755ZI-Q development board is damaged. If I replace it with a brand new MCU, how can I restore the program

[AScha.3]

Hi,

you cannot.

Because STM keeps the st-link firmware secret, you only can buy a st-link V3 (miniE or mods , are not much more expensive than buying a F723 cpu).

[XSMSQ]

 Bro,Can I purchase ST Link V3 and transplant the chip

[AScha.3 · Accepted solution]

Basically - yes/maybe. But firmware not same , it still will "know" its a st-link V3. And maybe says "error"....

afaik nobody did this .

ed: here he did it:

https://dalaotech.com/2021/08/26/1107/

(maybe, use translate...)

And big risk, if its not working , you just damaged board and st-link.

(de- and re-solder an BGA , you can do this with good experience on BGA rework?)

So better just buy an st-link miniE , has the 14pin ->

and your board has the 20pin ->

So it should work with the cable in the "right" position : vdd , swd,...reset , matching the position on the cable connector vcc, swd...reset.

And maybe remove the dead F723 , if it heats up or is shorted.

btw

What you did , to be sure, the F723 is dead ?

[XSMSQ]

Thank you, I was planning to purchase this, but I didn't do anything and it caught fire

[AScha.3]

Hmmmm,

I never seen a chip " caught fire " (on PC/USB connection) , except at work in some inverters in kW range, when something explodes. 

So you really didnt connect external (higher) voltage source or had some ESD discharge to the board ?

Then , if almost new board, dont repair but send it back to STM or distributor, for warranty replacement .

[XSMSQ]

When I was testing the IHN08M1 motor development board's sensorless mode, it burned     ：(

I successfully repaired it by replacing the ST-LINK V3 MCU and 3.3VLDO，Thanks You Bro!!!!!