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ADV7842 Graphics Input

Question asked by DRC on Jul 26, 2011
Latest reply on Jul 27, 2011 by DaveD

Hi,

 

I have a question about configuring the ADV7842 to process a graphics input.

 

This question is regarding a graphics input over DVI/HDMI.  In the HW Manual, Section 4 ("Primary Mode and Video Standard"), there is a PRIM_MODE setting for HDMI-Graphics (0x6), but the corresponding VID_STD settings shown in Table-3 only cover resolutions up to 1024x768.  What VID_STD settings do I use for larger resolutions like 1600x1200 or 1920x1200 (or any other formats with a pixel clock of 165 MHz or less).

 

Even for RGB-Graphics, many formats are not listed.  How do I configure the device for unlisted formats?  For example, say I want to capture 800x600 @ 120 fps (reduced blanking), pixel-clock = 73.25 MHz?  The HW Manual says the device supports formats with pixel clocks less than 170 MHz so this should be possible.

 

Thanks

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