On 08/04/2011 12:20, Oli Glaser wrote:
>> >  What can I do with 250K gates? How many 8 bit CPU cores can I fit on =
there,
>> >  for example? How about an ARM 32 bit core? How many gates (approximat=
ely) do
>> >  these cores take?
> A small 8-bit core will be a few tens of K - IIRC, the one I am using
> currently on a ProASIC3 takes about 20K gates, but depends on the
> settings (you can select different bus widths, whether to enable certain
> instructions etc) FPGA cores like Picoblaze and CoreABC(Actel) are
> designed for size/efficiency so are very simple. To get similar to e.g.
> 16F functionality you need more gates - for example IIRC an (Actel) 8051
> core with no peripherals takes around 60K gates (again depending on
> settings, but I remember the smallest setup not quite fitting on a 60K
> device) but you can use the Keil C compiler for it (as opposed to a
> small popup screen for assembler for the CoreABC - not sure about the
> Picoblaze though)

Also don't even think about Floating Point!
(usually).

If you need a CPU and Floating point, buy one and interface it to the FPGA!

--=20
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