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ADV7612 DE_REGEN_LCK_RAW not locked 1080p24

Question asked by CorentinC on Jun 24, 2013
Latest reply on Oct 9, 2013 by mattp



We have a strange problem with the ADV7612 DE_REGEN lock status when receiving 1080p24 video format.


Sometimes (once in ten cases) the DE_REGEN_LCK status stay to the unlocked state. Vertical and CP lock are OK.


I made a register dump of all ADV7612 registers when DE_REGEN_LCK_RAW was correctly locked and when it was not and there is no other register differences between the two dumps than the DE_REGEN bits (bit 0 of 0x6A IO register and bit 5 of 0x07 HDMI register).


Which lock status should we monitor to enable video output from the IC (currently video output is disabled if DE_REGEN is unlocked so we have sometimes black screen outputs)?


Best regards,