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zqizh.1
zqizh.1
Associate III
Jun 4, 2021 6:56 AM UTC
Solved

How to recover STM32L562E-DK

Hi,

My setting is "TZEN=1", "RDP=1", "nSWBOOT0=0","nBOOT0=1".

I can't use it anymore, please tell me how to regression the TZEN to 0 and RDP to 0.

Thanks,

QiZhang

This topic has been closed for replies.
Imen.DBest answer
ST Technical Moderator
Jun 4, 2021 8:13 AM UTC

Hello @zqizh.1​ ,

Have a look at this STM32 wiki article How to disable TrustZone in STM32L5xx devices during development phase

Hope this helps you ! =)

When your question is answered, please close this topic by choosing Select as Best. This will help other users find that answer faster.

Imen

In order to give better visibility on the answered topics, please click on 'Best answer' on the reply which solved your issue or answered your question. Thanks
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2 replies

Imen.DBest answer
ST Technical Moderator
Jun 4, 2021 8:13 AM UTC

Hello @zqizh.1​ ,

Have a look at this STM32 wiki article How to disable TrustZone in STM32L5xx devices during development phase

Hope this helps you ! =)

When your question is answered, please close this topic by choosing Select as Best. This will help other users find that answer faster.

Imen

In order to give better visibility on the answered topics, please click on 'Best answer' on the reply which solved your issue or answered your question. Thanks
ITeo.1
ITeo.1
Associate II
Jun 29, 2021 1:06 AM UTC

Hello @Imen DAHMEN​ 

Referring to the statement in the wiki article mentioned "If the boot is based on the nBOOT0 option bit, it is no longer possible to program the option bytes, and hence not possible to boot from RSS. It is therefore not possible to do regression.", so there is no way to recovered the Board if there is no secure application in MCU Flash to call non-secure application and the respond from the cmd line is that the core is locked. Or there is a hard way to recover the board?

Thanks,

Ivan

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