A quick peek at the datasheet indicates that sync in RGB mode would be on the CVBS pine, so some additional plumbing would be required for that... basically the result would be RGBC, where the CSYNC would come from the composite output.Note that many (all?) PVR-350s contain SAA7129 rather than 7127, and the 7129 has dedicated RGB/Cr-Y-Cb outputs.
Has anyone investigated this (or similar) at a hardware level, and if so, any joy?
I only got as far as noting that these RGB pins didn't seem to go anywhere useful. Unless your PCB is different from mine, you'd have to connect to the pins directly, which can be slightly fiddly. But if that has been done, I can't see anything that prevents the use of this output... as long as you remember to modify the saa7127.ko module so it configures the SAA7129 correctly.
The 7129 datasheet is here: http://www.semiconductors.philips.com/acrobat/datasheets/SAA7128H_SAA7129H_3.pdf
Just out of curiousity... what's the purpose of this? Trying to connect 480i to an HDTV directly? It looks like the RGB luminance output would have the same frequency response as the Y/C output, so it wouldn't really help anything but possibly chrominance resolution. Can it run at higher frequencies, maybe (480p?)
Interesting... -Cory
************************************************************************* * Cory Papenfuss * * Electrical Engineering candidate Ph.D. graduate student * * Virginia Polytechnic Institute and State University * *************************************************************************
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