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ADV7341 non-interlaced mode

Question asked by paul80021 on Oct 4, 2010
Latest reply on Oct 5, 2010 by DaveD

We have a system where we need to output standard-def NTSC (interlaced) but the video data we have is in a progressive format.

 

The video input to our system is 30 bit RGB. The S_HSYNC and S_VSYNC pulses that are being presented are correct in frequency (S_VSYNC is just a bit under 60 Hz) and in polarity (active low); all as expected.

 

In our specific system, we are configuring for NTSC input, per table 72 on page 97.

 

In the Rev A data sheet, page 56, in the section entitled "SD NONINTERLACED MODE" it indicates that register 0x88, bit 1 be set to 1. Either setting register 0x88, bit 1 or clearing this same bit seems to have no effect.

 

Help?

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