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Re: [f-cpu] Re: your mail

On Mon, 8 Oct 2001, Michael Riepe wrote:

> Does that mean the F-CPU multiplier runs at >1GHz in an ASIC, and needs
> only 3% of the die area? ;)

Well, Intel has managed to get >1GHz at 0.18u so 1GHz at 0.13u should not
be impossible. And at 250kgate/mm^2 and 100mm^2 (quite small die) you can
burn 750 kgates for 3% of the area. Cache memory takes most of the die
area anyways. Have you ever opened FPGA packages, the dies are huge. Even
something like 400mm^2 and over.

> > Biggest disadvantage of big FPGAs is the price. ~$1000 is quite good price
> > estimate in volume for the state of the art FPGAs.
> When you say "volume", you probably mean 1000+ of them in a box, and
> $1000 for each of them, right?

Yes, I meant that. FPGAs are expensive if you need the best performance
and lots of gates.

Mr. Kim Enkovaara   | kim.enkovaara@iki.fi | Microelectronic Riemannian
Vasamatie 1 C 16    | IRC: embo            | curved-space fault in
02630 Espoo         |                      | write-only file system

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