Re: what is the fastest speed that FPGA deals with CPU?

Hi,

I am working with PCI-X Interface, which is 64bits wide and 133Mhz.

But I have some problem in getting this much frequency in Xilinx FPGA?

Regards,
Muthu


"walala" <[EMAIL PROTECTED]> wrote in message news:<[EMAIL PROTECTED]>...
> "Kolja Sulimma" <[EMAIL PROTECTED]> wrote in message
> news:[EMAIL PROTECTED]
> > "walala" <[EMAIL PROTECTED]> wrote in message
>  news:<[EMAIL PROTECTED]>...
> > > Dear all,
> > >
> > > Is PCI the only convinient interfacing unit that talks with CPU by
>  inserting
> > > something into a computer conviniently? What is the speed of that? Is
>  there
> > > any faster method?
> > PCI is the only relatively fast interface that is available on almost
> > any computer for internal extensions and has good operating system
> > support for hardware drivers. The usual 32-Bit, 33MHz PCI can provide
> > 133MB/s in theory of which about 90MByte/s are usable without to much
> > effort for writes, considerably less for reads. There are also 66MHz
> > and/or 64-Bit variants available on more expensive mainboards.
> >
> > But there are lots of alternatives.
> > There are faster "PCI-like" interfaces like AGP, PCI-X, PCI-Express
> > (only possible with some FPGAs).
> > You can also connect your hardware via ATA or SCSI busses. That's
> > about the speed of PCI. For data aquisition tasks you can make your
> > hardware look like a tape drive so that you do not need to write a
> > driver and readout software. Just use the tar command for that.
> >
> > Probably the fastest interface inside a PC is a memory slot. But
> > getting OS support for your device in this case is not straight
> > forward. But there are a couple of GByte/s available there.
> >
> > And then you can use all the external interfaces: FireWire, USB,
> > Ethernet, ...
> >
> > Kolja Sulimma
> 
> Hi, Kolja,
> 
> Thanks a lot for your help!
> 
> Can you compare in a little more detail of those internal or external
> interfaces?
> 
> For example, USB vs. PCI? Or PCI-X vs. FireWire?
> 
> I guess USB is not as fast as PCI, right?
> 
> Thanks a lot,
> 
> -Walala