Unable to erase STM32H743 device. How to recover the device?

[mr.1]

I have flashed the SBSFU application with write protection enabled for flash address 0x08000000.

After that, I am unable to erase using jlink commander.exe as well as by IAR->project->Download->erase.

STM32H743 has SWD interface and i am using jlink debugger for connection.

I am able to connect jlink debugger. But i could not erase it.

Please suggest me how to erase the flash of STM32H743II.

[FBL]

Hello @mr.1​,

Have you tried using STM32CubeProgrammer to erase the flash?

[mr.1]

Hi Belaid,

I am unable to connect with cube programmer through jlink debugger. It is custom board doesn't have onboard ST debugger. Any other way to erase the flash through jlink debugger?

[Pavel A.]

@mr.1​ J-Flash package (available from Segger) has a special utility, JLinkSTM32.exe

<quote> This program is designed to reset the option bytes of a STM32 device to their factory settings. If read protection of the device is enabled, reset the option bytes will cause a mass erase.</quote>

Try it. You can also ask in the Segger J-Link or J-Flash forum for more info on its use.

[mr.1]

I tired with STM32 unlock command line tool. But it is failed to make in default factory setting

[Tesla DeLorean]

There are stand-alone ST-LINK pods

Segger has some tools with the J-Link that do similar things, you'll need to review their documentation.