On Wed, 2 Feb 2005, Timothy Miller wrote:
Attila Kinali wrote:
On Wed, 02 Feb 2005 17:43:37 +0100 Raphael Jacquot <[EMAIL PROTECTED]> wrote:
/me votes for the ADV7311 it does it all, and doesn't have the stupid macrovision... granted, it's 20 bucks, but that's fine with me :D
I'd say the ADV7312 is enough for our case. We don't need that additional bit in resolution (couldn't spot any other diferences) as we are using just 8 bits/pixel/colour anyways.
BTW: Did someone spot how this chip is supposed to generate normal VGA signal for computer monitors ?
Another note: Our other hardware engineer who is looking at this said that he fully intended, using ADV parts, that the DVI would be separate.
This puts us in the following position:
(1) Standard video will be something like the ADV7312 plus single-link DVI and cost about $15 in parts.
(2) We'll put on an extra footprint for an additional DVI transmitter. If someone wants dual-link (like for the Apple panel), they can pay an extra manufacturing/processing/parts fee to have the extra chip added.
(3) If you want to solder on the extra chip yourself, we'll tell you how, but it would probably void your warranty.
Comments?
Would a modular daughterboard be a viable option?
NO.
> You could put a header
on the board for the link, lay out a few holes for stand-off mounting as part of the PCB fab and then sell this (and other?) daughter boards as add-ons. Wouldn't have to void any warranties due to hobbyists handy-work and pares down production costs down to the board layout and header to accommodate it as a future add-on. Documented well enough, perhaps other developers would even be willing and able to produce their own 3rd party daughter boards.
If we spend the money to add the extra hardware to the main board that would be necessary to connect an additional transmitter, we might as well just stick on the transmitter.
Connectors that support really high signal quality at GHz frequencies (which DVI requires, being TMDS) are EXPENSIVE. REALLY EXPENSIVE.
No, it's difficult enough to get good signal quality when you can place and route the part directly on the main board.
This needs to be another FAQ. People ask about expandable memory and daughter-boards. Those things require FAR more expense than the parts you want to add on.
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