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adv7181: a problem is that there is no color ouput but only black and white

Question asked by almn on Nov 30, 2011
Latest reply on Dec 6, 2011 by GuenterL

hi,AE:

    My problem is that adv7181 have no color output but only black and white

 

I gave PAL video to adv7181,and the av code of bt656 has correct Y component,but the CbCr component is always 0x80,so I got a  picture without color.

 

I have configed the register with reference provided by ADI like this :

 

"AUTODETECT CVBS IN NTSC/PAL/SECAM  8 bit 4:2:2 ENCODER"

 

How can I get the correct CbCr component ?

 

Thanks

 

FPGA Engineer

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