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ADV7393 as black burst generator but problem locking to external H/V

Question asked by Tune on Jun 21, 2016
Latest reply on Jul 12, 2016 by PaulS

I've seen the message: Using ADV7393 as black burst generator

 

I want to do the same, I'm using slave SD Timing Mode 1 (using HSYNC and Field), connected a 27Mhz clk and left the pixel data P[7:0] connected to GND.

 

But i have a problem getting the analog video output to frame align on the sync inputs. It is locked to the pulses but it starts random not locked to the Field. I've tried reseting the internal SD timing from the ADV7393 by setting bit7 from register 0x8A.

But then it randomly starts with its frame

 

 

Best Regards

 

Teun

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