Hello
Im desiging a PCI Express card that have a PCI Express bridge (PCI Express one lane to PCI 66MHz) on the card edge connector.
The PCI Express bridge is connected to a PCI bridge (PCI to local bus) on my card.
PCI SPEC. determine the PCI clock trace lenght to be 2.5 inch for add-in card, but this is not the case in my card because the PCI bridge
is connected to a PCI Express bridge.
the question :
what is the pci clock trace length between the bridges and what is the pci data trace length between the bridges?
picture :
---------------------------------------------------------------------------= =AD---------
| | ---------------------------- | | PCI to local bus | | | | | ---------------------------- | pci clock trace /|\\ /|\\ data,control traces | | | | | | | --------------------------------- | | PCI express to PCI | | | | | ---------------------------------- | PCI Express x1 lane /|\\ | | | | | |
---------------------------------------------------------------------------= =AD---------
| | pci express connector ------------------