topic Re: MPC5744, can't inject a SRAM correctable ECC error in MPC5xxx

MPC5744, can't inject a SRAM correctable ECC error

Jamber_H — Mon, 12 Apr 2021 15:14:36 GMT

Hi,

I want inject a SRAM correctable ECC error by config the dcr E2EECSR0. I can set the E2EECSR0, but can't generate a SR_CE in MEMU, what's the reason about it? Does it have relation with aligment or link command file?

Best regards

Jamber

Re: MPC5744, can't inject a SRAM correctable ECC error

petervlna — Tue, 13 Apr 2021 11:59:20 GMT

Hello,

I am quite confused here.

It looks like you are talking bout 2 different things.

1.ECC single bit error in RAM

2. E2E ECC protection

So which one you want to inject? ECC on RAM array?

Best regards,

Peter

Re: MPC5744, can't inject a SRAM correctable ECC error

Jamber_H — Tue, 13 Apr 2021 12:26:02 GMT

Hi Peter,

By setting the dcr E2EECSR0 to 0x1001, it can generate a single ECC error for next CPU external write access, and it will be detected by MEMU for the next CPU read access.

My problem is I can set the dcr E2EECSR0 to 0x1001, but MEMU can't detect a SR_CE.

My code references the excemple:

https://community.nxp.com/t5/MPC5xxx-Knowledge-Base/Example-MPC5744P-1b-2b-RAM-ECC-error-injection-GHS714/ta-p/1117504

Re: MPC5744, can't inject a SRAM correctable ECC error

Jamber_H — Wed, 14 Apr 2021 02:41:17 GMT

Hi Peter,

What I want to do is shown in this figure. Is there some misunderstand about SR_CE injection and detection with me?

Best Regards

Jamber

Re: MPC5744, can't inject a SRAM correctable ECC error

petervlna — Fri, 16 Apr 2021 06:52:48 GMT

Hello,

The fault will be reported in SR_CE as manual express.

My problem is I can set the dcr E2EECSR0 to 0x1001, but MEMU can't detect a SR_CE.

Set the example accordingly and run it:

I was just talking to the demo code author and there is not known issue with it.

The fault is also reported in FCCU NCFSx register.

Best regards,

Peter