Re: V-Box

From: John (
Date: 2000-09-01 10:10:27

Steve Judd writes:

>	SAA 7111A HZ

That's good.  This chip (and most of the video stuff Philips do) is
controlled by an I2C bus.  I2C is driven by open-collector outputs, so you
can hang extra devices on it - including controllers.  The chip will decode
just about any video format you could want - but it has to be told which
one (some of these chips will detect the standard, and tell you, but you
still have to switch it to a particular mode).

So it should be possible to build a little add-on that waits until the chip
is initialised and then writes a new configuration.  I2C is easy, and the
datasheet (freely downloadable) tells you everything you need to know.

I forget the start of this discussion - did you want to change the input or
the output format?

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