I looked for AN5428 mentioned in RM0438 rev. 7 on Page 100, and did not found it.

[HLewo.1]

..

[Peter BENSCH]

Sorry for the inconvenience, the RM0438 has not yet been corrected.

The same question has already been answered here:

Please note that this application note is no more available.

Its content is currently moved to the reference manual RM0438. All references to this application note will be removed.

Regards

/Peter

[Tesla DeLorean]

https://community.st.com/s/question/0D53W00000OUONX/where-to-find-an5428

@Amel NASRI​ 

Related

https://www.st.com/content/ccc/resource/training/technical/product_training/group0/5c/77/af/1c/86/07/44/ce/STM32L5-Memory-Flash_FLASH/files/STM32L5-Memory-Flash_FLASH.pdf/_jcr_content/translations/en.STM32L5-Memory-Flash_FLASH.pdf

https://www.st.com/resource/en/application_note/dm00625692-stm32l5-series-trustzone-features-stmicroelectronics.pdf

[HLewo.1]

Thanks for the fast reply.

But now I have another problem.

I set TZEN to 1 in my own hardware board and want it now reset to zero.

Is it safe to set RDP to 0.5 and then again to zero to reset the TZEN bit even when the FLASH is erased?

[TDK]

If you have another problem unrelated to the initial one, create a new thread for it.