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ADV7441A STDI Problem!

Question asked by johnsonlee on Nov 21, 2011
Latest reply on Dec 6, 2011 by DaveD

Hi all,

I would like to share 1 problem I met with STDI and any comments or suggestion is welcomed.

 

Attached 2 files are H sync signal of resolution 1920x1200 60Hz from 2 different sources.

IMG001.JPGIMG002.JPG

 

The only difference of STDI readback values is LCVS where 1 is 3 and the other 1 is 6.

As know, it should be 6 for CVT.

 

I also measure V sync, both sources have same period and sync width.

 

I wonder how STDI check the pulse width of sync, at 30%, 50% or 80%..

 

BRs,

Johnson

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