Cecil
This is where the ‘standard’
departs from what we are doing. We are using the standard connectors and card
sizes and enclosure standards for availability. Time to use the buss as our own
mnemonics and I hope one or more of them is -> To Phil Covington’s 1 W PA, which will probably
end up on Phil Harman’s BPF board! (smile).
Ok Guys let’s get on the buss!
Eric
From: xylo-sdr-bounces@lists.ae5k.us
[mailto:xylo-sdr-bounces@lists.ae5k.us] On
Behalf Of KD5NWA
Sent: Monday, January 16, 2006
10:45 AM
To: Xylo-SDR Discussion
Subject: Re: [Xylo-SDR] FPGA board
What does the Eurocard standard calls for? I've looked up a lot of
boards lately and the schematic labels them 1-96
At 09:11 AM 1/16/2006, you wrote:
We need to decide on the function of all 96 pins on the DIN41612
connector soon before you finalize your design.
A suggestion: The pins are normally numbered A1-A32, B1-B32, and
C1-C32. A1, B1, and C1 start on the same side of the connector.
Using pin numbering of 1-96 will cause more confusion.
Phil N8VB
On 1/16/06, Leon Heller <leon.heller@bulldoghome.com> wrote:
> I've just ordered some FAN1112 1.2V regulators direct from Fairchild.
Mouser
> seemed to have a problem with my credit card (I probably got the number
> wrong) so I've cancelled that order. My Fairchild distributor had them,
but
> only if I wanted to buy a reel of 2,500! 1.2V regulators are somewhat
> difficult to find, probably because the output voltage is lower than the
> reference supply used on most regulators.
>
> I've got some triple output switching regulator samples from TI that are
> made specifically for FPGAs, but they are a lot harder to use.
>
> I've also ordered a couple of the SRAMs from Farnell.
>
> I've made the PCB 100 mm x 100 mm, and changed all the Rs and Cs to 0603.
>
> On the DIN41612 connector I'm using pins 1, 33 and 65 for Gnd and pins 32,
> 64 and 96 for 5V. It's a four-layer board with a ground plane and supply
> voltage plane for VccIO (3.3V). I'll use a copper pour area for VccINT
> (1.2V).
>
> 73, Leon
> --
> Leon Heller, G1HSM
> leon.heller@bulldoghome.com
> http://www.geocities.com/leon_heller
>
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>
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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 ...