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TUSB211: Eye diagram is pass, but can not recognize device

daniel
Genius 5095 points
Part Number: TUSB211

Hi Team,

Our application is a USB pin board, connect USB HOST(PC) and USB device(Camera)

If we bypass TUSB211, the eye diagram would be fail, but PC can recognize the camera.

If we use TUSB211-level 3 setting, the eye diagram can pass, but PC can not recognize the camera.

Why we improve the signal quality, but got function detect fail? Please give us some suggestion.

Thanks

  • 0
    TI__Expert 3655 points

    Please confirm two things.

    Can you double check your settings. Is it EQ level 3 (Eq2). It looks like over boost condition. Depending on the placement it could have false disconnect issue.

    Can you please sketch out a simple block diagram where is the 211 placed from pc to the camera, board trace, cable length etc. At which point eye diagram is taken?

  • 0
    TI__Guru 60870 points
    Hi Daniel,

    Is there any update?