Re: Question on BGA pinout for 66MHz PCI

[Ted Firlit <firlit@utmc.aeroflex.com>]

James,

I would also suggest that you consider whether your chip may eventually
be used on a compact PCI board.  If so there may be some compromising on
pin locations to help meet the PCB length requirements for both cPCI and
PCI.

regards,

Ted Firlit

burched - tony burch wrote:
> 
> Hi James,
> 
> I would suggest using a PCB CAD package to place down the
> BGA that you are using, and do a route of signal lines
> from the PCI connector to your BGA pads.  I believe that
> the resulting pinout, that makes the PCB routing simplest, will
> often be the best pinout to adopt.
> 
> That is, of course, unless there are other constraints.
> If you are using an FPGA and some third party PCI
> interface IP, then the pinouts may be recommended
> or defined by the FPGA vendor, or the IP supplier.
> 
> For example, if you are using a Xilinx FPGA for your PCI
> interface, and if you are using Xilinx PCI Logicore IP,
> then the pinouts for the PCI signals to the BGA packages
> are fixed by the user constraints file (UCF), that is
> supplied with the IP.
> 
> Hope that helps.
> 
> Best regards
> 
> Tony Burch
> 
> www.BurchED.com.au
> Lowest cost, easiest-to-use
> FPGA prototyping kits!
> 
> > Hello
> >
> > Are there any recommendations for pinout placement for a BGA package and
> > 66MHz PCI? The PCI spec discusses pinout for a PLCC package but does not
> > really address BGA packages.
> >
> > I assume a 66MHz PCI implementation pinout will be critical?
> >
> > Any advice??
> >
> > James Murray
> >
> >