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ADV7280A LLC clock problem

Question asked by Bivin on Jul 12, 2018
Latest reply on Jul 19, 2018 by PoornimaSubramani

Hi

I'm using ADV7280A and ADV7393. I'm connecting ADV7280A output directly to ADV7393.

I'm facing issue with LLC clock generated by ADV7280A. The following circuitry for crystal is used for XTAL inputs.

1) I have observed the following :

Color is observed when my own color video input is given to ADV7280A and LLC is used as input clock to ADV7393.

Color is not observed when inbuilt test pattern from ADV7280A is given to ADV7393 and LLC is used as input clock to ADV7393.

Color is observed when inbuilt test pattern from ADV7280A is given to ADV7393 and our 27.000MHz is used as input clock to ADV7393. But image is distorted

Color is coming for inbuilt test pattern generated with ADV7393 with our clock of 27.000MHz.

Color is coming for out test pattern given to ADV7393 with our clock of 27.000MHz.

What should be done to fix the above issue ? Kindly let me know to get a proper clock as ADV7280A LLC output to connect it directly to ADV7393 clk_in pin.

 

2) Also i kept auto-detection mode in ADV7393 but when i'm connecting ADV7280A with my video input , vsync is not proper and image is getting shifted vertically. How to fix this?

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