[sdiy] uC with mul

[jbv]

Paul,

> > 2) I guess I need to get the development board + soft tools
>
> You dont need the board, just the chip in your own design..
> The tools, perhaps, at least some method of transfering data from the file
> into the binary format for the FPGA.
> The projet I am building with an FPGA will have the FPGA code stored on
> eprom, and the CPU will program the FPGA each time it powers up...

Ah ah !!! I knew there was a trick !!!!    ;-)
extra eprom means additional component, additional cost, additional PCB room...

The ready-made mul chip looks more & more attractive...

> > If my project works, then I might consider replacing the mul by some
> FPGA...
> > Does that make sense ?
>
> yep, seems to..
> But then if it works, why change it?

To be proud to have designed & made everything from scratch, and to have
a real application to explore and learn more about FPGA domain (which is what
DIY is all about IMHO)...

>
>
> > And while I'm at it, here's another question :
> > if you guys need some FAST flash EPROM & RAM (both 64K x 16), which parts
> > would you choose ? I've seen some tempting AMD chips...
>
> how fast?
>

As close to 10 ns as possible.

As for SRAM, I spotted the Samsung KM6161002AJ15 (64K x 16 - 15 ns)
and for Flash, the 29F400 (AMD & Samsung AFAIR - 256Kx16).
According to the data sheet, the 29F400 is available in 90, 70 or 55ns, but
I only found 90ns from distributors...
Of course, there's always the trick to load some parts of the ROM into fast
SRAM at startup...

Best,
JB