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ADV7604 STDI not locking for 1024 x 2048

Question asked by ppg on Feb 5, 2014
Latest reply on Feb 11, 2014 by PaulS


I am using ADV7604 and inputting the following resolution over DVI input.




Horizontal active          1024

Vertical active                    2048

refresh                              56.56 Hz

clk                              128.00 MHz

hfront porch                    32

vfront porch                    26

hback porch                    16

vback porch                    3

hsync width                    16

vsync width                    3


ADV7604 doesn't lock to the resolution and I see CP Map, Address 0xB1, [7] (CH1_STDI_DVALID Standard Identification Data Valid for channel 1 Read Back) to toggle between 0 and 1.


Any ideas if there are any registers that need to be programmed?

Are there any limitations on min or max pixels per line, or no. of lines in ADV7604 that we need to look out for?


I have a board with ADV7612 and when I feed it with the same source and resolution, it works just fine. I have tried this with 3 different sources and always see the same issue.