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is it really neccessary to disable ecc before run pbist on cpu ram?

Other Parts Discussed in Thread: RM48L952, HALCOGEN

target mcu is rm48l952.

In the startup code generated by  HALCOGEN i found that ram ecc is disabled before doing pbist for main ram.

But i did an experiment in which i did pbist for esram8 without disabling the ram ecc. The pbist still get passed.

so i am wondering that if i really need disabling ram ecc.before pbist. Could anybody.tell me?