In a message dated 25/01/99 14:50:36, you write: >On Mon, Jan 25, 1999 at 01:53:28PM +0000, Andrew Gale wrote: >> Thinking about it, even RGB connections still need the composite >> video signal for synchronisation..... so ignore my comments about >> not needing the 12v line! > >Surely it's the composite sync they need, not the composite video - >a different thing entirely. The main job of the MC1377P is turning >the RGB signals into a chroma and luma signal; I'm fairly sure the >sync is created by something else. > >imc > >
Indeed, the 1377 is just a D-to-A converter. There is even a version of the chip that does not need the 12v. -- Bob.
