AnsweredAssumed Answered

About improve the eye pattern of USB OTG in i.MX6DQ.

Question asked by Keita Nagashima on Sep 27, 2016
Latest reply on Sep 30, 2016 by igorpadykov

Dear All,

 

My customer is using the USB OTG with Full speed in i.MX6DQ.

But, eye pattern was bad quality.

 

 

In case of High speed mode, the signal quality was improved by changing the D_CAL & TXCAL.

But, the quality wasn't improved in Full speed mode.

[Q1]

Is there register to improve the signal quality with Full speed mode?

 

 

And, the signal quality was worse by increasing the value of TXCAL in Full speed mode.

(In High speed mode, the quality was better by above setting...)

 

[Q2]

Are HS mode and FS mode the relation of the inverse proportion by increasing the TXCAL value?

 

Best Regards,

Keita

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