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Re: [Xylo-SDR] FPGA board
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.
On 1/16/06, Leon Heller <email@example.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
> 73, Leon
> Leon Heller, G1HSM
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