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ADV7612 Interlace Detection

Question asked by hderby on May 5, 2012
Latest reply on May 31, 2012 by mattp

We're developing firmware for the ADV7612.  When the incoming signal changes to a new interlaced mode, it appears that VERT_FILTER_LOCKED becomes set while HDMI_INTERLACED is still clear.  Some time later, HDMI_INTERLACED does set, but by this time we have already begun configuring for a non-interlaced mode.  We don't poll HDMI_INTERLACED; we look for VERT_FILTER_LOCKED_RAW change interrupts, and we don't get one in response to the change in HDMI_INTERLACED.

 

The data sheet suggests that HDMI_INTERLACED should be valid when VERT_FILTER_LOCKED is set.  Our observations seem to indicate that this isn't the case.

 

We're working with the ADV7612-ADV7511 eval board connected to our own processor.

 

Any thoughts?

 

Thanks,

 

Howard 

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