AM6421: DDR Margin test result

Zekun Bai

Expert 3565 points

Part Number: AM6421

Tool/software:

As the previous thread is closed, so summit another one here.

Customer want to get some ideas about how to evaluate the DDR margin test result. Could you give some help here?

ddr_magin6 (1).pdf

Regards

Zekun

4 months ago

0 JJD 4 months ago

TI__Guru* 86550 points

Zekun, in general, you would be looking for the training results, represented by the blue triangles, to be in the middle of the eye in the diagrams. If you see the triangles towards the edge of the eye, or the eye is degraded or misshaped, then some software configuration update or board improvement would probably need to be made.

Regards,

James

0 Biao Li 4 months ago in reply to JJD

TI__Expert 6440 points

Hi James, Zekun,

There is some Chinese APN can have some introduction about the Jacinto digital eye diagram can be reference as well.

https://www.ti.com.cn/cn/lit/pdf/zhcadl8

BR,

Biao

0 Zekun Bai 4 months ago in reply to Biao Li

TI__Expert 3565 points

Thanks, James, Biao.

Let me feedback to customer and see if it helps.

Regards

Zekun

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AM6421: DDR Margin test result