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adv7343 problem

hi i am using the adv7343 with fpga and adv7180 in order to transform pal to ntsc in real time. the adv7180 is part of my altera board (de2 115 cyclon 4E) and i have no problems with it. the adv7343 i bought separately and i have assembled it on my own with the tools and parts I had. I followed the circuit in the adv7343 datasheet as close as i could ,i attached the scheme with the exact values i used in my circuit.

the problem i am having is with the i2c, the component is not reacting well. it gives ack when it doesn't need to give one like when i send to address 0x50 data and it doesn't give a NACK

so my problem is that i don't know if the component is good or is it a problem with my circuit.

in addition i used an oscillator to generate the 27MHz freq and this is the clock:

the i2c writes i'm using is:

0x5600FC

0x568440

0x5682CB  \\ i am using cbvs on DAC1


thanks a lot

BARUPDATE.pdf
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  • Looking at the scope, I see two complete horizontal lines.  The first line is black about 2/3 away across then white the remaining 1/3.  The second line is white the first 1/3 of the line and black the remaining line.  The left half of the image is generated by the second scope horizontal line and the right half of the screen is generated by the white part of the first scope horizontal line.

    From the scope it looks also like the horizontal line after the second complete is all black.  This would produce product a complete black line across the entire screen. 

    It appears the screen shows exactly what the scope shows so the problem is the generated 656 stream has incorrect video in the active region.

    What is the data between the SAV and EAV.  All you show above is the blanking area which should be black

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  • Looking at the scope, I see two complete horizontal lines.  The first line is black about 2/3 away across then white the remaining 1/3.  The second line is white the first 1/3 of the line and black the remaining line.  The left half of the image is generated by the second scope horizontal line and the right half of the screen is generated by the white part of the first scope horizontal line.

    From the scope it looks also like the horizontal line after the second complete is all black.  This would produce product a complete black line across the entire screen. 

    It appears the screen shows exactly what the scope shows so the problem is the generated 656 stream has incorrect video in the active region.

    What is the data between the SAV and EAV.  All you show above is the blanking area which should be black

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