On 1/8/06, Leon Heller <leon.heller@bulldoghome.com> wrote:
I'll do it!
I'll order some of the 96-way connectors and a couple of FX2 chips
tomorrow,
so I can check the footprints. I've already got the Cyclone II chips, but
I
need to get some of the configuration chips, as well.
I've got the 96-way straight and right-angle connectors in the Pulsonix
library.
I'll use a four-layer board. There is no point in cutting corners and
it'll
be much easier to design, as well as cutting down on emissions. As most
of
the connections will be to the DIN connector, I'll save a lot of time by
using the autorouter on them. I might as well put a 24.576 Mhz oscillator
on
the board, feeding one of the FPGA clock inputs and brought out to the
connector, to save having one on the ADC board, as well as a 50 MHz
oscillator. I've had my Flex board running at 125 MHz, so we could got a
lot
faster.
Maybe the clocks should stay on the individual boards instead of
putting them on the motherboard? They can always be routed to other
boards if needed. It would be nice to make the motherboard all
passive components.