Recover STM32h745I-Disco option bytes

PMari.11 · ‎2020-05-23

Hi,

I was playing around with my STM32h745I-Disco and did some tests regarding starting and stopping the CM4 from the CM7. But I accidantly messed my the option bytes up. I disabled BCM7 and BCM4 with CubeProgrammer and now the chip is not starting anymore. But I can also not connect to with the embedded ST-Link to recover the option bytes. Is there a way to get the board back to work?

Thank you and best regards

Philipp

TDK · ‎2020-05-23

Use the "STM32 ST-LINK Utility" to connect to the board using access port 3 (under Target -> Settings), then change the option bytes back.

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View solution in original post

TDK · ‎2020-05-23

Use the "STM32 ST-LINK Utility" to connect to the board using access port 3 (under Target -> Settings), then change the option bytes back.

If you feel a post has answered your question, please click "Accept as Solution".

PMari.11 · ‎2020-05-23

Thank you very much this fixed my issue.