Re: [Xylo-SDR] Xylo

["Jeff Anderson" <jca1955@sbcglobal.net>]

One more PCB recommendation:  Mounting Holes.  Preferably isolated (to
minimize unintented ground loops), but perhaps groundable via a jumper.

- Jeff, WA6AHL

-----Original Message-----
From: xylo-sdr-bounces@lists.ae5k.us
[mailto:xylo-sdr-bounces@lists.ae5k.us]On Behalf Of John Kolb
Sent: Wednesday, December 14, 2005 10:43 PM
To: Xylo-SDR Discussion
Subject: Re: [Xylo-SDR] Xylo



I always try to have a few spare I/O pins, selecting a larger footprint
part if necessary - requirements always change in the middle of the design
and someone wants a simple unplanned addition. I always connect unused
I/O pins to at least small pads I can solder to, if no room to bring them
out
to a header.  These spare pins can be observed on a scope or used
to drive LED's. The FPGA will be programmed to bring internal nodes
out to these test points for monitoring..

John

At 07:52 AM 12/14/2005, you wrote:
>Sorry, I'm not laying out the PCB, Leon Heller in GB is laying out a
>board using the Cyclone II chip. I was just throwing some ideas at
>him on what we have to have and what would be nice to have on the board.
>
>Your right a couple of Led's would be nice, to let you know what is going
on.

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