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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



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?