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As.51
As.51
Associate III
Jun 11, 2020 11:49 AM UTC
Question

Rest RDP Read Protection

Hi, I have the STM32F427VI, I don't know how this happend but now is read/write protected Level1. How can I reset this, I want to disable read protection at all to burn my application.

Now I can't read the memory 0693W000001qVU5QAM.pngwith STM Utility with J-TAG and coudn't erase memory with Demonstrator GUI via RS232. Please see the attached image.

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6 replies

TDK
TDK
Jun 11, 2020 12:08 PM UTC

Uncheck all sectors on the bottom and change Read Out Protection in the top-left to Level 0 and apply.

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As.51
As.51Author
Associate III
Jun 11, 2020 2:20 PM UTC

I tried this but I get the error: Could not set Option bytes!

Please see the attached picture. Thank you for your help:)0693W000001qWgbQAE.png

Piranha
Piranha
Principal III
Jun 11, 2020 9:12 PM UTC

Set "Connect Under Reset" and do full chip erase.

As.51
As.51Author
Associate III
Jun 15, 2020 2:24 PM UTC

This is not working. Please see the images attached

0693W000001qjM5QAI.png

0693W000001qjLvQAI.png

As.51
As.51Author
Associate III
Jun 15, 2020 2:34 PM UTC

I managed with the option bytes to remove the read only but when I conenct with JTAG I still get the message that the MCU is ready only0693W000001qjSwQAI.png

As.51
As.51Author
Associate III
Jun 15, 2020 2:42 PM UTC

I managed to do it by removing all jumpers in the board.Thanks!

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