About DQ amplitude by DDR3 stress test in i.MX6DQ.

[keitanagashima]

Dear All,

Hello. We found the 1st bit of the DQ amplitude was small by DDR3 stress test (Writing mode).

And, tDS/tDQ found tight specifications (DQS or DQ - CLK).

*Refer to attached file.

How to increase the DQ amplitude?

For example, if user increase the DQ Drive strength (40 Ohm --> 34Ohm), is this issue improved?

This question is related to the following thread.

https://community.freescale.com/message/558926#558926

Best Regards,

Keita

[Yuri]

Hello,

  Please refer to reply from app team in

About Signal amplitude on DQ lines in i.MX6DQ.

Have a great day,
Yuri

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[keitanagashima]

Dear Yuri,

Hello. Thank you for your reply.

I think so, too.

The amplitude was improved by ODT setting.

Another way, the DQ amplitude was improved by increasing the drive strength, isn't it?

Best Regards,

Keita

[Yuri · Accepted solution]

Hello,

Yes, the DQ amplitude may be improved by increasing the drive strength.

Regards,

Yuri.