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MPC5777C has 2 MPUs (MPU-0, MPU-1)

Question asked by Lakshmi Kanth on Feb 11, 2019
Latest reply on Feb 12, 2019 by Lakshmi Kanth

Hi NXP,

I'm working on MPU (Memory Protection Unit) of MPC5777C. 

 

"MPC5777CRM.pdf" says the MCU has two MPUs. (say: MPU-0, MPU-1).

- Problem: Details of why 2 MPUs are available and differences between them are not mentioned. 

- Query  - 1: So, can I assume that both MPUs are same or they have different features in the slaves they monitor and etc. (Sufficient information not available in MPC5777CRM.pdf, so please suggest where I can get this info of XBAR slaves that MPU-0, MPU-1 can monitor) 

- Query - 2: MPU in MPC5777C cannot monitor flash is my conclusion after observing MCU block diagram. But, few example projects on MPU (MPC57xx) in Community shows that REGION-DESCRIPTORS being assigned with CODE-Region (Flash) addresses as mentioned below:

=========================================================================================

====== (User Query: When MPU cannot monitor FLASH, how can we assign flash addresses to RGD) ===========

/* Flash memory 4MB */ (User Query: When MPU cannot monitor FLASH, how can we assign flash address to RGD)

 

MPU.RGD[0].WORD0.R = 0x00000000; /* Start address */ 
MPU.RGD[0].WORD1.R = 0x0003FFFF; /* End address */
MPU.RGD[0].WORD2.R = 0x3F00001F; /* Read-write-execute allowed for all master */
MPU.RGD[0].WORD3.R = 0x00000001; /* Mark descriptor as valid */

=========================================================================================

 

Please let me know on this. Thanks in advance. MPC5777C architecture  peter vlna david lukas

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