What is the usage of mirror flash in MPC57XX?

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What is the usage of mirror flash in MPC57XX?

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jerrytomlee
Contributor II

Is it for ECC or other thing? 

Can those area be accessed?

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davidtosenovjan
NXP TechSupport
NXP TechSupport

Could you specify used device more concretely?

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jerrytomlee
Contributor II

MPC574xP

As is shown there are mirror flash memory in the Manual.

This is from the Reference Manual of MPC5744P

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davidtosenovjan
NXP TechSupport
NXP TechSupport

It is due to calibration i.e. remapping flash portion by SRAM. On the predecessors such operation has been done by MMU (using of virtual addresses). As MMU is no longer present, overlay support has been added.

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