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Input DVI 500x100 60Hz signal (adjusted from 800x600 60Hz) to ADV7619, no image is displayed

Question asked by safin on May 4, 2017
Latest reply on May 15, 2017 by GuenterL

Hello all,

Input DVI 500x100 60Hz signal (adjusted from 800x600 60Hz) to ADV7619, no image is displayed

 

a). Input the DVI 800x600 60Hz signal to the ADV7619, and the back end shows the image is normal
Timing parameters: H_start 215, V_start 27, Width 800, Height 600, H_Total 1056, V_Total 628, V_freq 60Hz

Read the ADV7619 register as follows:
LINE WIDTH = 800
FIELD0 HEIGHT = 600
FIELD1 HEIGHT = 600
TOTAL LINE WIDTH = 1056
HSYNC FRONT PORCH = 41
HSYNC PULSE WIDTH = 128
HSYNC BACK PORCH = 87
FIELD0 TOTAL HEIGHT = 628
FIELD0 VS FRONT PORCH = 1
FIELD0 VS PULSE WIDTH = 4
FIELD0 VS BACK PORCH = 23
FIELD1 TOTAL HEIGHT = 628
FIELD1 VS FRONT PORCH = 1
FIELD1 VS PULSE WIDTH = 4
FIELD1 VS BACK PORCH = 23

ADV7619 backend Receiver received timing consistent with reading the contents of the ADV7619 scratchpad

 

b). Input DVI 500x100 60Hz signal (adjusted from 800x600 60Hz) to ADV7619, no image is displayed

H_start 515、V_start 27、Width 500、Height 100、H_Total 1016、V_Total 628、V_freq 60Hz

Read the ADV7619 register as follows:
LINE WIDTH = 500
FIELD0 HEIGHT = 100
FIELD1 HEIGHT = 100
TOTAL LINE WIDTH = 1016
HSYNC FRONT PORCH = 1
HSYNC PULSE WIDTH = 123
HSYNC BACK PORCH = 392
FIELD0 TOTAL HEIGHT = 628
FIELD0 VS FRONT PORCH = 501
FIELD0 VS PULSE WIDTH = 4
FIELD0 VS BACK PORCH = 23
FIELD1 TOTAL HEIGHT = 628
FIELD1 VS FRONT PORCH = 501
FIELD1 VS PULSE WIDTH = 4
FIELD1 VS BACK PORCH = 23

But the ADV7619 back-end Receiver received the timing and read the contents of the ADV7619 register is not consistent
Receiver Received Width 856, Height 479, H_Total 800, V_Total 771, V_freq 49Hz
Image not shown

 

How to solve?

 

safin

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