STM32CubeProg stm32h7xx Option Bytes User Configuration disappears if disabled by firmware

dariis · ‎2025-02-26

If on a STM32H747 the Cortex-M4 (BCM4 or BOOT_M4 Bit) is disabled by software, it is impossible to reactivate it with the STM32CubeProg v2.18.0 because the checkbox disappears in the user interface. But this happens only if you do a power cycle and reconnect to the target.

mƎALLEm · ‎2025-02-28

So it's a GUI issue not related to the hardware.

Internal ticket 204208 has been opened for analysis. This ticket is not accessible by the community users.

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mƎALLEm · ‎2025-03-05

Behavior reproduced internally by our teams.

It will be analyzed asap.

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Michael3368 · ‎2025-05-06

Any update on this? I have the exact same issue. I unchecked BCM4 in STM32CubeProgrammer for STM32H745, and then after reboot, the checkbox isn't even there to check it again.

Also, it is not just GUI because the Cube Programmer CLI says the BCM4 register isn't available now.

mƎALLEm · ‎2025-05-06

If there were any update I've already provided it..

Don't expect to have an updated version very soon. I will keep you informed for any update.

Thank you for your understanding.

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