ADLINK PXI-8570 - Manual (Page 20)

16 • Hardware
Figure 3.1 Block diagram of PCI/PXI-8570
3.2 Bus Architecture
Each PCI/PXI-8570 extension module has two link ports. Users can use one of
them to extend PCI bus to a PXI chassis or both of them to extend PCI bus to two
PXI chassis.
The following figure represents an example of the PCI extension architecture.
The desktop PC or PXI system extends the PCI bus to two PXI chassis via
PCI/PXI-8570 modules. From the system view, the three PCI/PXI-8570 modules
act as three PCI-to-PCI bridges. Thus the serial interconnection between these
bridges is also a bus, i.e. bus 1 in this example, although it’s not PCI architecture.
PCI/PXI
Interface
PCI arbiter
(1)
System Clock
(1)
PCI-to-StarFabric /
StarFabric-to-PCI
Converter
Serial
Link 0
Serial
Link 1
Four 622Mbit TX/RX
differential pairs
Four 622Mbit TX/RX
differential pairs
64-bit
66MHz
PCI/PXI
Bus
Note(1) Enabled when PXI-8570 is plugged
in system slot.