2024-03-28 07:49 AM
For a project for one of our customers, we use STM32WB15CCU6 microcontrollers on a custom board. The boards are returning from the field with several of the option bytes of the microcontroller set to a different value than they were programmed with. We would like help in restoring them.
2024-05-21 10:19 AM
Hello @DKM-JDV
As you can see on the RM0473, SBRSA_A, SBRSA_B and C2OPT are read only. So, you can't reset them using Cube Programmer.
For the FUS you can follow the Wiki that you are referring to but you have to ensure that you didn't activated the anti-rollback mechanism before installing any Firmware or stack. In this case you may can't backup your MCU (More details are on the Wiki).
Best Regards.
STTwo-32
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2024-05-22 03:32 AM
Thank you for the reply. We haven't activated the anti-rollback mechanism. Since we don't use the Bluetooth functionality, we haven't installed the stack.
We have contacted your support team via our vendor at EVB; we've shipped a defective device to Alan PORTE, but haven't got a reply yet.
2024-05-28 08:34 AM
Hello @DKM-JDV
I'm the supporter who received your board.
First of all, my apologies for the delay. To be fully transparent, in order to avoid any mistake I had requested more info to the EBV contact on how to connect to the board and proceed with power supply. But I didn't receive feedback from him and thus the ticket he had created has been automatically closed.
I see the J11 connector on your board which I guess is for SWD connection, but as mentioned above, I would welcome confirmation and instruction in order to pursue my investigation.
Schematic and PCB layout can help as well.
In case you don't want to publish it publicly on this forum, then you can answer to my email I sent to you.
Best Regards,
Alan PORTE
ST MCU Support Team