Can I interface the following input with ADV7511w? The documentation says Hsync + Vsync are mandatory (DE is optional) , but my frontend camera chip provides only H and V valid signals.
From the above figure, the Line Valid signal appears to be the DE signal. You will need to generate H & V syncs from the Frame Valid and Line Valid signals.
Basically Hsync can be derived from Line Valid and Vsync can be derived from Frame Valid. Compare this waveform against any standard VESA waveform.
If HSYNC and VSYNC to be generated then we need to implement some additional logic in FPGA...so are you confirming that ADV7511w can't do DE based capture?
I have never tried to do DE capture only. We only test to VESA and CEA standards so I am not sure how the device would respond. Down stream devices use H and V Sync to determine the format so they can set up correctly just like our receivers do.
I you want to experiment I suggest purchasing a ADV7612-7511 or ADV7842-751 evaluation board. You can pull the V and H sync jumpers and see if it does what you need it to. The 7511 can not generate V & H sync from DE only so there's no timing information for the sink to latch on to, you would need a custom sink, They only cost ~$200 and come with full scripts and software
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