I need to understand the data, DE, VSYNC, HSYNC and CLK inputs of ADV7511 video controller. I need them to program FPGA card (Xilinx Kintex KCU116) that has this video chip. FPGA manual says it uses ADV7511 to provide 1080P 60 Hz, YCbCr 4:2:2 encoding via 18-bit input data mapping.
The 18 bit data bus looks more or less clear, VSYNC and HSYNC most likely mark end of the frame and end of the row, and CLK is for the clock, hopefully one tick per pixel. Please correct me if these assumptions are wrong.
What is the DE signal for? Can I leave it maybe unconnected? I have looked into various documents on the product website, but seems that the signals are not properly described. The FPGA board manual does not explain much either.
There is another question about ADV7511 but it is different and looks way too broad to be answered.