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EVAL-ADV7842-7511P output problem

Question asked by Longz on Sep 27, 2017
Latest reply on Oct 10, 2017 by mattp

We use attached file named "bt656-ADV7842_7511-hdmi.txt" to debug.the step as flowing:

1.Conect EVAL-ADV7842-7511P and PC through USB serial, the input video source of ADV7842 is 720P@60fps;

2.Power on EVAL-ADV7842-7511P board;

3.Open "AVES2" 

4.Load scripts file named "bt656-ADV7842_7511-hdmi.txt"

5.Select "6-1fx Port A, 1080p YPrPb 444 in, RGB 444 out, Through HDMI (Fast Switching)VIC[16,31,32]" -->"1080p60 16-bit bus embedded syncs";

6.The hdmi output  of ADV7511  is normal, the display can be observed.


The question is that the sequential waveforms likes abnormal, voltage amplitude of pixel clock(red line) is abnormal.Yellow line is data clock.We doubt that it cause backend IC can't received any current signals now.Please help us,Thanks.