Re: Re: [pci] Newcomer to PCI

[Stefan Bergström <stb@viking2001.se>]

A modern MoBo only drives the PCI signals to 3.3V but are 5V tolerant.
It is safe to use a 3.3V chip as long as you make sure you don’t insert
another board that will drive the signal levels to 5V. Just put your
oscilloscope to your PC and you will see.

Have Fun
STB

> -----Ursprungligt meddelande-----
> Från: owner-pci@opencores.org [mailto:owner-pci@opencores.org] För
> jazimme2@yahoo.com
> Skickat: den 13 maj 2003 06:46
> Till: pci@opencores.org
> Ämne: Re: [pci] Newcomer to PCI
> 
> It's keyed as a universal card, so it should work in any PCI slot at
32-
> bit, 33MHz.  You just need user constraints to tell the Xilinx
software
> whether it is 5V PCI I/O or 3.3V.  Note that there are now two
> (completely?) different versions of the development board out, so if
> someone on here gives you project files for the old one you'll
probably
> have some editing to do.  Incidentally, the Virtex/SpartanII is the
final
> Xilinx FPGA likely to support the 5V PCI systems...all the later chips
> including the SpartanIIE are requiring 3.3V I/O...which is only
present
> nowadays in expensive server motherboards with 64-bit 66MHz slots.
> This Memec card *does* work in those server systems as well though.
> 
> And Wishbone info is in the blue bar at the top of (all of) the
opencores
> web pages.  You'll want to make your design a wishbone target, to hook
> up to the wishbone master interface of the pci core.  (Unless, of
course,
> you want to do bus mastering with the card, but that's beyond the
> scope of what I have time to help with right now)
> 
> You can email me, but I'd rather keep it on the forum if that's
ok...your
> questions might help some other people, and others can help answer the
> questions as well.  I don't know *everything*...
> j.
> 
> ----- Original Message -----
> From: Sajid Farooq <sajid876@y... >
> To: pci@o...
> Date: Tue, 13 May 2003 02:16:30 +0100 (BST)
> Subject: Re: [pci] Newcomer to PCI
> 
> > Wow! Checked out that site and it was awsome. Thats exactly what
> > i've been looking for. 275$ is affordable. Thanks!
> >
> > I still probably need a PCI core though, no? The XILINX one is
> > prohibitvely expensive. For this PCI core, i need to make my design
> > Wishbone (sorry, not MBone...silly me) compatible, but will it then
> > work with any PCI slot after installing my own drivers? If yes,
> > then where can i get info on Wishbone?
> >
> > Jazimme, thanks for the reply. Helped a bunch. I hope you woudn't
> > mind if sent you a mail sometime and spared the poor people on this
> > list yet another newbie mail... :)
> >
> > Thanks
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