Digi NS9750 - Manual (Page 485)

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P C I - t o - A H B B r i d g e
Important:
Note that in cases where NS9750 provides the PCI clock, the PCI clock
connection to the NS9750 must still be made external to the NS9750, as
shown in Figure 73 (that is, connect
PCI_clk_out
to
PCI_clk_in
). This is done to
minimize the clock skew between the NS9750 and external PCI devices.
CardBus Support
NS9750 can support 32-bit CardBus applications using the existing PCI port and
existing PCI-to-AHB bridge IP.
Figure 74 shows how NS9750 is configured for CardBus applications. The CardBus
model has only one external card connected to a host adapter or PCI-to-CardBus
bridge through a socket. All connections are point-to-point, and both the host
adapter and the external card can be masters on the bus.