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ADV7343 Not Recommended for New Designs
The ADV7342/ADV7343 are high speed, digital-to-analog video encoders in a 64-lead LQFP package. Six high speed, 3.3 V, 11-bit video DACs provide support...
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adv7343 RGB output image shift issue

Robin-010

on May 24, 2023

Category: Hardware

Product Number: ADV7343

I am using ADV7343 chip. The input configuration is BT656 Ycbcr, and the output uses DAC1 as CVBS, DAC2 and DAC3 as Y/C, and DAC4, DAC5 and DAC6 as RGB output.

No matter whether the input is NTSC 480i or PAL 576i format, a problem is found now that the CVBS and Y/C outputs are normal, but the RGB output image is skewed to the right, I don't know why.

shifed to right

Thank you very much for your kind help.

moved & added tag
[edited by: emassa at 3:46 PM (GMT -4) on 24 May 2023]

0 PoornimaSubramani

on May 25, 2023 6:19 PM
Hi,

If possible, Could you please share your register configuration ?

Thanks,

Poornima
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0 Robin-010
on May 26, 2023 7:51 AM in reply to PoornimaSubramani
The PAL mode registers.

{ 0x17, 0x02 } , // RGB CVBS and Y/C 14-26
{ 0x00, 0xFC } ,
{ 0x01, 0x00 } ,
{ 0x02, 0x10 } ,
{ 0x80, 0x11 } ,
{ 0x82, 0xC1 } ,
{ 0x87, 0x00 } , //YCbCr
{ 0x88, 0x00 } , //8bit YCbCr
{ 0x8A, 0x00 } , //SD timing mode 0
{ 0x8C, 0xCB } ,
{ 0x8D, 0x8A } ,
{ 0x8E, 0x09 } ,
{ 0x8F, 0x2A } ,
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0 PoornimaSubramani

on May 26, 2023 3:13 PM in reply to Robin-010
Hi,

Please configure only below registers for RGB out and let us know the result,

{ 0x17, 0x02 } , // RGB CVBS and Y/C 14-26
{ 0x00, 0xFC } ,
{ 0x01, 0x00 } ,
{ 0x02, 0x10 } ,
{ 0x80, 0x11 } ,
{ 0x82, 0xC1 } ,
{ 0x87, 0x00 } , //YCbCr
{ 0x88, 0x00 } , //8bit YCbCr
{ 0x8A, 0x00 } , //SD timing mode 0

Also note that, In SD Timing Mode 0, During this mode the S_VSYNC and S_HSYNC pins are not used, they should be tied to VDD_IO.

Thanks,

Poornima
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