i.MX Processors中的主题 Re: i.mx8qm DRAM ecc configuration

i.mx8qm DRAM ecc configuration

roffelsen — Thu, 07 Sep 2023 22:40:17 GMT

Can someone point me to documentation on how configure, enable, and test DRAM ECC on the i.mx 8QuadMax? IMX8QMRM indicates ECC on DRAM is supported but I can't find any details on how to enable it.

Re: i.mx8qm DRAM ecc configuration

roffelsen — Thu, 07 Sep 2023 23:03:22 GMT

> IMX8QMRM indicates ECC on DRAM

I think I have to take that back, the manual mentions ECC in the DDR Controller section but no where do I find it saying it is supported. Given that and the lack of documentation on how to configure it I am guessing ECC on DRAM is not supported.

Re: i.mx8qm DRAM ecc configuration

Zhiming_Liu — Mon, 11 Sep 2023 06:52:17 GMT

The default setting has enabled the ecc feature, can you share if you are facing issue in your product.

Re: i.mx8qm DRAM ecc configuration

roffelsen — Mon, 11 Sep 2023 13:50:39 GMT

Are you saying the i.mx8qm supports ecc on DRAM and turns it on by default at processor startup?

If so:

1) Can you point me to where this is documented?

2) What is the processor response when a non-correctable double bit DRAM ecc error occurs?

3) If there a way to inject ecc errors in DRAM so fault response can be tested?

Re: i.mx8qm DRAM ecc configuration

Zhiming_Liu — Tue, 12 Sep 2023 03:19:47 GMT

Correct this answer, i.MX8QM doesn't support ECC, iMX8DXL support this, the ECC keyword in reference manual and DDR script doesn't mean it supports ECC.