Re: [Xylo-SDR] Xylo

["ecellison" <ecellison@comcast.net>]

Cecil

Yes, depending on how and when we actually define the project and what we
expect to accomplish, the I2C port, and the high speed usb port is all we
need in development. We realy only need a few pins on the Altera (at this
point for what has been suggested) Probably for the GPS input and 200 mhz
clock counter from the SDR - 1000. The Microchip I2C 16 bit I/O ports about
a buck are all the I/O I think we will need on a designed board. This is
just assuming the SDR-1000 but obviously we can do a lot more with this
development system.

Eric


-----Original Message-----
From: xylo-sdr-bounces@lists.ae5k.us [mailto:xylo-sdr-bounces@lists.ae5k.us]
On Behalf Of KD5NWA
Sent: Tuesday, December 13, 2005 1:07 PM
To: Xylo-SDR Discussion
Subject: Re: [Xylo-SDR] Xylo

A USB2 port to talk to the PC, a I2C port to talk to the A/D and D/A 
chips, and a bunch of I/O pins, what else do we need?

Maybe a second I2C header (2 bits + header), one for A/D the other 
for slower peripheral I/O scattered through a system? That doesn't 
cost much. Or perhaps a I2S interface (3 bits + header), some A/D and 
codec devices require I2S instead of I2C. These items are mostly 
implemented in the FPGA but it would be nice to have the connector on board.

A Ethernet 100T port? That would be nice, but can be added in 
afterwards (2 bits + magnetic jack or a add-on board) at slightly 
more expense compared to built in.

Let us not forget a program to make the thing do something useful.

I've been reading up on Verilog, the language is starting to make 
sense, scary thought. Too bad it didn't exist when I was working as a 
Engineer (up to 1983) it would have made life easier.


At 11:05 AM 12/13/2005, you wrote:
>----- Original Message -----
>From: <mailto:kd5nwa@cox.net>KD5NWA
>To: <mailto:xylo-sdr@lists.ae5k.us>Xylo-SDR Discussion
>Sent: Tuesday, December 13, 2005 4:30 PM
>Subject: Re: [Xylo-SDR] Xylo
>
>By the way the Saxo board uses the Altera's Cyclone FPGA EP1C3T100 
>so your board with the Cyclone II will be the developers hot-rod.
>
>I just noticed that. The Saxo appears to be more of a basic system 
>than the Xylo board, with much less stuff on it, and a lot cheaper.
>
>I've got one of the Xilinx/Digilent Spartan 3 kits with a -400 part. 
>It was only $125 from Digilent. It's better in some ways than the 
>Xylo board, but doesn't have USB.
>
>My Cyclone II chips have been shipped, according to FedEx. They 
>haven't left Memphis, yet, so I probably won't get them for a couple of
days.
>
>Leon
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Cecil Bayona
KD5NWA
www.qrpradio.com

I fail to see why doing the same thing over and over and getting the 
same results every time is insanity: I've almost proved it isn't; 
only a few more tests now and I'm sure results will differ this time ...  


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