Option Bytes grayed out in STM32CubeProgrammer for STM32H725 in DFU mode

[frongus]

Hello everyone,

I am currently working with an STM32H725 microcontroller, and I am encountering an issue when trying to access the Option Bytes (OB) via STM32CubeProgrammer in DFU mode. The OB option is grayed out, and I am unable to modify it.

Could there be specific security features in the STM32H725 that prevent access to OB in DFU mode? Is there any solution to unlock this option?

Thank you in advance for your help!

[mƎALLEm]

Hello @frongus and welcome to the community.

With STLINK do you get the same behavior?

[frongus]

Hello

Thank you for your response. Unfortunately, I do not have an STLINK at the moment; I only have access to DFU mode for now.

Best regards.