QUESTIONS RELATED TO FCCU OF MPC56434L

[arthivenkatasub]

Hi,

 I am studying the FCCU module of MPC5643L. I have a doubt. What is the difference between RCC AND RCCU? Why there are 2 RCC in FCCU? Is there any relation between error correction control and FCCU? I mean whether the errors are related to the faults in the FCCU? Also how it functions when the operation mode is LSM?

Regards,

Arthi

[davidtosenovjan]

RCC is portion of FCCU module checking FCCU functionality itself:

RCCU is redundancy checker (on some other places called RC) checking replicated content in certain points (core, DMA, PBRIDGE, XBAR, SRAM and FLASH) - it is related to lock-step mode:

[arthivenkatasub]

Hi,

Is there any relation between error correction control and FCCU?

One more question,

Also there is a mode called supervisor mode and user-level mode. Can you explain how they are classified and is there any possibility to switch between these two modes?

Regards,

Arthi

[davidtosenovjan]

I suppose you mean ECC or ECSM module.

If you see my appnote AN5200, section 7, you will know ECSM/RGM/FCCU relation:

http://www.nxp.com/assets/documents/data/en/application-notes/AN5200.pdf 

Supervisor/user mode I have explained for instance here

How to enter into supervisor mode and user mode in MPC5675K MCU? 

or here

supervisor mode vs user mode for S32R274