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Locked STM32 F4 Disc. by Read Out Protection Level 1

Question asked by Daniel Kusche on Jan 18, 2018
Latest reply on Feb 6, 2018 by AvaTar

Good morning,


I got an issue with the ROP-Level (read out protection) and therefore the MC is locked for further flash – actions. The power supply has been interrupted during an flash – action. I assume that this is the reason why the ROP level has been set to 1.


However, I checked the common sources and pages for troubleshooting / handling for that issue. I tried the ST-Link utility tool and the J-Link command line / J-Link unlock tool.
I’m not able to reset the ROP level to 0, neither with the on or the other tool.
Please see the attached screenshots (two for J-Link and 5 for ST-Link).


May you can give me a few hints to fix that issue?

Kind Regards,