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ADV7842 3D_Comb(TBC=Off) , Output picture has small waving noise issue at CVBS input.

Hello,

When I start 3D_Comb function, Output picture has small waving noise issue at when I used CVBS input.

However, this issue doesn't happen when I used Y/C input.

also, when I stopped 3D_Comb, this issue disappear even I used CVBS input.

System contens

3D_Comb = On

TBC=Off

64Mb SDR

It seems this issue is relating 3D Comb function.

How can I fix this?

Regards,

Bogey

Parents
  • Hi Matt,

    Here is my answer.

    If you have any more queation, pleae let me know.

    Q1. Do you see this issue on EVAL-ADV7842-7511 when you run SW driver?

    Ans,

    I did not try SW driver.  I don't have SW driver.

    Q2. Do you see this issue on EVAL-ADV7842-7511 when you configure with scripts?

    Ans,

    Yes, I could see this issue on EVAL=ADV7842-7511.

    I use 2 kind SCRIP.  SDR and DDR version.

    Both verions have same issue.

     

    SDR
    94 75 06  ;add-yt(SD-RAM 64Mb)

    94 74 00  ;add-yt(SD-RAM 64Mb)

    94 79 33  ;add-yt(SD-RAM 64Mb)

    94 6F 01 ;add-yt(SD-RAM 64Mb)

    94 60 01  ;add-yt(SD-RAM 64Mb)

    94 7A 66 ;add-yt(SD-RAM 64Mb)

    94 7B 8F ;add-yt(SD-RAM 64Mb)

     

    DDR

    94 75 0A ;

    94 74 00  ;

    94 79 33  ;

    94 6F 00 ;

    94 60 01  ;

    94 7A A5 ;

    94 7B 8F ; 

    It seems ADV7842-7511 has multi issues at 3D_Comb.

    My system had random dots noise and Waving noise..

    I modfied GND line more strong, then randum dots noise has gone.  but, waving noise still remain.

    I can see same issues on EVAL-ADV7842-7511.

    Regards,

    Bogey

    attachment.zip
Reply
  • Hi Matt,

    Here is my answer.

    If you have any more queation, pleae let me know.

    Q1. Do you see this issue on EVAL-ADV7842-7511 when you run SW driver?

    Ans,

    I did not try SW driver.  I don't have SW driver.

    Q2. Do you see this issue on EVAL-ADV7842-7511 when you configure with scripts?

    Ans,

    Yes, I could see this issue on EVAL=ADV7842-7511.

    I use 2 kind SCRIP.  SDR and DDR version.

    Both verions have same issue.

     

    SDR
    94 75 06  ;add-yt(SD-RAM 64Mb)

    94 74 00  ;add-yt(SD-RAM 64Mb)

    94 79 33  ;add-yt(SD-RAM 64Mb)

    94 6F 01 ;add-yt(SD-RAM 64Mb)

    94 60 01  ;add-yt(SD-RAM 64Mb)

    94 7A 66 ;add-yt(SD-RAM 64Mb)

    94 7B 8F ;add-yt(SD-RAM 64Mb)

     

    DDR

    94 75 0A ;

    94 74 00  ;

    94 79 33  ;

    94 6F 00 ;

    94 60 01  ;

    94 7A A5 ;

    94 7B 8F ; 

    It seems ADV7842-7511 has multi issues at 3D_Comb.

    My system had random dots noise and Waving noise..

    I modfied GND line more strong, then randum dots noise has gone.  but, waving noise still remain.

    I can see same issues on EVAL-ADV7842-7511.

    Regards,

    Bogey

    attachment.zip
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