YpPbPr on Analog Inputs of ADV7481

Question

Hello, 
 I need help with YPbPr Analog inputs on ADV7481. For my project I reused reference design adv748xebz-sch_b2.pdf to connect YPbPr signals from RGB to YPbPr converter: 
 
 Regarding to the reference design Y goes to AN1, Pr to AN2 and Pb to AN3 
 The PCB has just arrived from manufacturer and what I found in the datasheet is: 
 
 Regarding to datasheet Y goes to AN1, Pb goes to AIN2 and Pr goes to AIN1. 
 It seams that I swapped Pr and Pb. 
 Is there any solution for this? 
 Thanks in advanced, 
 Aleksandar 
 PDF

PoornimaSubramani · Accepted Answer

Hi,

Please note,YPrPb can only be processed by ADC0, ADC1, and ADC2 So we need three AIN pins totally but in your case its seems like you have used two AIN pins(AIN1/AIN2) for YPbPr input.

For Example

Ain1 => ADC0 so ADC0_SW[3:0] = 0001, Y

Ain2 => ADC2 so ADC2_SW[3:0] = 0010, Pr

Ain3 => ADC1 so ADC1_SW[3:0] = 0011, Pb

In general

ADC0 <= Y/G

ADC1 <= Pr/R

ADC2 <= Pb/B

Thanks,

Poornima

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YpPbPr on Analog Inputs of ADV7481

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