Die size, pitch size?

Dear

When I look at Virtex-II Pro data sheet (DS083 v. 4.5), page 7,
I see following table.

-------------------------
Package    FF896
Pitch (mm) 1.00
Size (mm)  31 x 31
-------------------------

I guess that

Distance between neighbor pins = 1 mm
Die size = 31 mm x 31 mm

Could someone explain this?
Am I correct?

Pasacco <pasacco@gmail.com> wrote:
> Dear

> When I look at Virtex-II Pro data sheet (DS083 v. 4.5), page 7,
> I see following table.

> -------------------------
> Package    FF896
> Pitch (mm) 1.00
> Size (mm)  31 x 31
> -------------------------

> I guess that

> Distance between neighbor pins = 1 mm
                            ^^^^
Substitute oins with balls

> Die size = 31 mm x 31 mm
  ^^^

Substitute  die with package.

The die should be substantial smaller or else
the IC would be much more expensive

> Could someone explain this?
> Am I correct?


-- 
Uwe Bonnes                bon@elektron.ikp.physik.tu-darmstadt.de

Institut fuer Kernphysik  Schlossgartenstrasse 9  64289 Darmstadt
--------- Tel. 06151 162516 -------- Fax. 06151 164321 ----------

Let me ask other question.

FPGA device consists of
Huge SRAM cells (around 10 Mbits, xc2vp30-ff896) + memory controller +
hard cores (such as PPC, multiplier)

If we neglect hard cores,

I guess that more than 95% of FPGA device is just array of SRAM cells.

Does someone aware of these data?
Thank you again.

On Aug 30, 11:57 am, Pasacco <pasa...@gmail.com> wrote:
> Let me ask other question.
>
> FPGA device consists of
> Huge SRAM cells (around 10 Mbits, xc2vp30-ff896) + memory controller +
> hard cores (such as PPC, multiplier)
>
> If we neglect hard cores,
>
> I guess that more than 95% of FPGA device is just array of SRAM cells.
>
> Does someone aware of these data?
> Thank you again.

Your number is exaggerated, but what is your point?
What do you try to prove, argue, challenge, understand ???
FPGA technology is no big secret.
It is well-understood in the technical, commercial and academic
communities.
Peter Alfke

I just need to know some technology data, for example, "die size" and
"LUT size", in order to compare different designs.
As far as I know, these technology data are not available anywhere.

"Pasacco" <pasacco@gmail.com> wrote in message 
news:1188548197.323123.43310@i13g2000prf.googlegroups.com...
>I just need to know some technology data, for example, "die size" and
> "LUT size", in order to compare different designs.
> As far as I know, these technology data are not available anywhere.
>
>
What sort of engineer are you? For God's sake man, get a hammer, smash some 
FPGAs open, and examine the wreckage with a microscope.
HTH., Syms.
p.s. Do FPGAs blend?

;-) 

There are many sorts of engineers in the world.
There is no problem in my posting. Be ignorant instead of posting
these offensive jokes.

On Aug 31, 1:32 pm, Pasacco <pasa...@gmail.com> wrote:
> There are many sorts of engineers in the world.
> There is no problem in my posting. Be ignorant instead of posting
> these offensive jokes.

Symon was not offensive, and he was not joking.
If you don't like the hammer approach, then go to your dentist and
have him take an Xray picture of a plastic-packaged FPGA. He has the
perfect equipment for that. Serious!
You keep asking these weird questions without ever telling us about
their relevance.
Peter Alfke

Dear Peter
Please understand that people sometimes find it offensive though they
did not mean it.
I mentioned that  "need to know some technology data, for example, die
size and LUT size, in order to compare different designs". Someone who
is doing research on different technologies, these data are
interesting and relavant, though it is weird for you.

On Aug 31, 2:29 pm, Pasacco <pasa...@gmail.com> wrote:
> Dear Peter
> Please understand that people sometimes find it offensive though they
> did not mean it.
> I mentioned that  "need to know some technology data, for example, die
> size and LUT size, in order to compare different designs". Someone who
> is doing research on different technologies, these data are
> interesting and relavant, though it is weird for you.

If you had started with something like:
"I am doing university research on the relative area efficiency of
SRAM-based vs antifuse-based FPGAs..."
We would have respected you and tried to help.
But just a series of (very) naive questions does not create that same
urge to help...
Peter Alfke
Peter Alfke