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ADV728x : Free-Run output timing

Question asked by tomoto Employee on Jun 14, 2018
Latest reply on Jun 14, 2018 by PoornimaSubramani

Hi

 

I've reffered below thread.

https://ez.analog.com/message/299195-what-happends-when-a-video-source-is-disconnected-from-the-adv7180-adv7182-and-adv728x

 

Could you advise if my understanding on Free-Run output timing is correct? 

Case 1) Start from Free-Run mode

             Video decoder output Free-Run signal during coarst mode and try to lock incomming video signal.

             Once it got locked(IN_LOCK=Hi), Video decoder will get out from Free-Run mode and switch to incomming video signal. The lock time depends on programmed mode, approx 1s(standard mode) and 250ms(fast switch mode).

Case 2) Video source connect -> disconnect(or lost)

             Video decoder get into coast but continue to output video signal(noise) for a period of time, then output Free-Run. The lost lock time depends on programmed mode, approx 1s(standard mode) and 250ms(fast switch mode).             

 

Regards,

Tomoto

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