LPC Microcontrollers中的主题 Re: How to Lock MPU_NS Configurations?

How to Lock MPU_NS Configurations?

RustyCohle — Fri, 30 Aug 2024 02:35:17 GMT

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!

Re: How to Lock MPU_NS Configurations?

xiangjun_rong — Fri, 30 Aug 2024 08:22:32 GMT

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

XiangJun Rong

Re: How to Lock MPU_NS Configurations?

RustyCohle — Sun, 01 Sep 2024 05:39:35 GMT

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