How to disable readout protection in stm32U575 in MB1519C DK?

[vijay_03]

I am using development board MB1519C. 

I was trying to disable trust zone in my board. 

For that I have followed below step in stm32cubeProgrammer.

Open option byte and set RDP level to 1 and apply and power reset and then RDP 0 along with trust zone uncheck (0).

After that I am not able to connect with my board via stmCubeProgrammer.

It shows below error. I also tried with hardware reset configuration.

Guide me to resolve issue.

 

Also tried with UART mode, In that case I received below error.

How to disable RDP?

[Diane POMABIA · Accepted solution]

Hi @vijay_03​ 

To disableTrustzone, you need To :

Step 1:Connect Boot0 to VDD on you board

Step 2:Connect your board with STM32CUBEProgrammer in "hot plug" Mode

Step 3: Switch RDP value to level 1 then click on apply

Step 4:

• Swith RDP value to level 0
• Uncheck the TZEN value in user configuration

Step 5 :Then click on apply to programe the option bytes

Step 6: Disconnect your board to STM32CUBEProgrammer

Step 7: Disconnect Boot0 to VDD

Step 8: Connect again your board with STM32CUBEProgrammer

You must reproduce this procedure faithfully or it will not work .

Regards

Diane