[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

RE: PCI clock distributuion..



I may be on the wrong track here.  If so just ignore.

A PICMG Passive PCI backplane SBC has enough Request/Grant/Clock signals to
control four PCI slots.  The SBC fits into a dedicated slot that happens to
look the same as all the others.

If you've only got 4 sets of control lines you can only really have 4
"slots" eg one bridge and three physical slots or two bridges and two
physical slots.

I'd see this as the limiting factor rather than loading/propagation issues.
Unless you're after non bus master slots.

Regards
John