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hs adjust and VBI adjust problem

Question asked by tracyone on Oct 10, 2014
Latest reply on Oct 13, 2014 by GuenterL

adv7842 or adv7441a

 

vga output:1366*768@60

 

In the output image on the left a small piece missing, and the color is wrong, I look at the signal and found that the effective number of pixels of each line of video over the 1366 pixels(1377)


my problem is how to set follwing register:I doubt that this phenomenon is due to this


DE_H_START = Vary the leading edge position of DE control register, CP map, 0x8B [3:2], 0x8D [7:0]
DE_H_END = Vary the trailing edge position of DE control register, CP map, 0x8B [1:0], 0x8C [7:0]
DE_V_START = Vary the start position of the VBI region control register, CP map, 0x8E [7:4]
DE_V_END = Vary the end position of the VBI region control register, CP map, 0x8E [3:0]


i saw this doc:ADV7844_ADV7842_Autographics_Pr0_031109

 

i can not get any useful infomation to set these register.....

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