I'm not able to get the ADV7610 to lock on vertical sync for low frame rate sources, sucha as (720p25/30, etc.). I know that the ADV7611 has a new vertical parameter extraction algorithm which may be turned on using the NEW_VS_PARAM bit (HDMI Reg 4C bit 2). I have tried setting this bit for the ADV7610 but it still does not sync. How can I configure the ADV7610 to sync to these sources. Thanks.