On Wed, 16 Apr 2008 13:02:49 +0100
Dieter <[EMAIL PROTECTED]> wrote:
> > > > 68 user I/O signals on an optional 100-pin ICD connector
> > >
> > > So the idea is the customer buys a connector and solders it on?
> > > IIRC the connector is more expensive than one would expect,
> > > but leaving off a connector on a $1500 board doesn't sound right.
> > > Customers may not like the idea of risking their warranty by
> > > modifying the board.
> >
> > I don't know. IDC Connectors are something everyone who
> > does some electronics has.. in the dozens. And they
> > are not expensive at all. At least not compared to
> > what other connectors cost. You can get one here in
> > Switzerland the cheap ones for something around 2-5 CHF
> > (1:1 USD) of 2x50 in single quantities.
>
> The common standard inexpensive IDC connectors do not fit the
> hole pattern on the board. Once you add the $30 connector
> it provides the standard IDC connector for a ribbon cable.
Oh.. right. I thought they were straight and not
staggered. Then i have to agree with Dieter, a connector
should be included with the board, though not soldered
in (for those who want to have another connector)
> I still don't know why the $30 connector was chosen rather than
> the cheap (US $0.40-$1.20 quantity 1) connectors. Perhaps due to
> board real estate, or signal routing issues? Too late now.
Good question. IMHO signal routing is with straigh pins simpler
and real estate doesn't fit either, because the pitch is 2.54mm
with all pins, it's just that the middle rows are moved by 1.27mm,
so the connector uses about the same space.
Attila Kinali
--
Praised are the Fountains of Shelieth, the silver harp of the waters,
But blest in my name forever this stream that stanched my thirst!
-- Deed of Morred
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