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ADV7393 RGB output brightness problem

Question asked by xwf72 on Jun 13, 2017
Latest reply on Jun 15, 2017 by JeyasudhaMuthuPerumal

I used three ADV7393 chip to produce 3-channel NTSC signal, channel 1 is CVBS signal, channel 2 is YPBPR signal, channel 3 is RGB signal, but I found RGB output image brightness was dark, and contrast is not very normal. The following is the ADV7393 configuration information;

 

1.  CVBS:

     reg0x17 = 0x02

     reg0x00 = 0x1C

     reg0x01 = 0x02

     reg0x80 = 0x10

     reg0x82 = 0xCB

     reg0x88 = 0x00

     reg0x8A = 0x0C

     reg0x8C = 0x1F

     reg0x8D = 0x7C

     reg0x8E = 0xF0

     reg0x8F = 0x21

2. YPBPR:

     reg0x17 = 0x02

     reg0x00 = 0x1C

     reg0x01 = 0x00

     reg0x80 = 0x10

     reg0x82 = 0xC9

     reg0x8A = 0x0C

3. RGB:

     reg0x17 = 0x02

     reg0x00 = 0x1C

     reg0x01 = 0x00

     reg0x02 = 0x10

     reg0x80 = 0x10

     reg0x82 = 0xC9

     reg0x8A = 0x0C

 

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