How to Lock MPU_NS Configurations?

[RustyCohle]

Hi, 

I want to know if NXP MCUs with TrustZone-M support locking the Non-secure MPU (i.e., MPU_NS) configurations by setting certain bits? This feature is supported by several ST MCUs such as STM32L552ZE.

Thanks!

[xiangjun_rong]

hi,

I suppose that you asked the LPC55S69, it is based on Cortex-M33 and has trust-zone module.

yes, there is register to lock/unlcok writing the MPU registers.

Pls refer to section 47.4.75 Miscellaneous control signals for in Primary CPU0 in the UM11126.pdf

Hope it can help you

BR

XiangJun Rong

[RustyCohle]

Thanks for your reply. That's exactly what I want to know.