CPU2 locked after an upgrade procedure

[YWor.1]

Hi.

I have STM32WB5MM-DK board and I'm trying to download an image file provided by ST for the BLE stack application. I had FUS and BLE stack installed, downloaded new BLE stack image (version 1.13 full) to address 0x809D000 (SFSA was 0xCB, 0xCB - NewFileSize(0x2D) - 1 = 0x9D).

I started FW upgrade procedure and it all went well, but after resetting the board, I didn't received CPU2 startup event.

I tried to check FUS info using STM32CubeProgrammer, but every command is receiving an error and reading FUS info shows FUS and STACK versions 0.0.0.0. Reading SFSA is shown 0x9D and even FW delete is failing.

Any idea for what happened or how can I fix it?

Thanks.

[Remy ISSALYS]

Hello,

Can you check the SBRV option byte value? Are you able to perform a FUS upgrade?

Best Regards

[YWor.1]

Hi.

SBRV is showing 0x31c00. FUS upgrade is also returning error unknown.

Thanks.