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ADV748x : the video will get shifted horizontally to the left in active video mode

Question asked by tomoto Employee on May 11, 2018
Latest reply on May 14, 2018 by PoornimaSubramani

Hi

 

Refering to "7.2.4 Video Standard and Frequency Selection" of ADV748x HardwareManual.

 

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When setting cp_vid_std[7:0] to any of the resolutions below, the video will get shifted horizontally to the left in active video mode:
• cp_vid_std[7:0] = 0x53: 720p (1280x720 active resolution)
• cp_vid_std[7:0] = 0x54: 1080i (1920x1080 active resolution)
• cp_vid_std[7:0] = 0x5E: 1080p (1920x1080 active resolution)
The picture gets shifted by equal number of clocks as the hsync width. For example, the hsync width is 40 clock cycles for 720p, so the picture would get shifted by 40 pixel clocks.

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Could you explain the reason why only these three "cp_vide_std" will have video shift and the other has no?

 

Regards,

Tomoto

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