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ADV7611 : unexpected DE to HSYNC shift in 1080p mode free run vs non free run

Question asked by ak1000 on Oct 2, 2012
Latest reply on Oct 3, 2012 by mattp

Matt,

 

I have a question that pertains to the HYSNC pulse location relative to DE dependent on the VID_STD register setting.  When VID_STD= 1E (SMPTE274M), there is a shift in HSYNC relative to DE in non-free run to free run mode that is not expected, but when VID_STD =3E (reduced blanking), HSYNC does not shift when switching between non-free run and free run mode.  This shift is causing an issue with the video processor that is receiving this data.  Is this shift expected?

 

Thanks

 

 

 

             

 

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