is there ant stm arm mc that i can place secret data on its flash or secured memory sector (protected R/W)and only my code can read it ??

[IAwwa]

RDP feature is great but code can be modified via IAP programs so i need an mc that have a secure portion of memory that cannot be overwritten at all and cannot be read by user only my code can read from this portion

[Tesla DeLorean]

No

You could use OTP for permanent data, or NVRAM(BKPRAM) to store sensitive data you can destroy if you detect tampering.

[IAwwa]

stm32L5 family support trust zone security , coul any one knows when this family will be available in market ?