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PEX8524-BC25BIG Datasheet(PDF) 3 Page - PLX Technology |
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PEX8524-BC25BIG Datasheet(HTML) 3 Page - PLX Technology |
3 / 4 page Almost all (non x86 based) high-end microprocessor manufacturers are offering PCI Express interfaces. The PEX 8524 can be directly connected to a processor to fan-out its PCIe port to a larger number of ports for enhanced connectivity as illustrated in Figure 3. Figure 3. Fan out for PowerPC/MIPS CPUs Embedded Systems The PEX 8524 can also be utilized in embedded applications. Figure 4 shows several independent modules connecting through the PEX 8524. The port widths for each module can be configured as required. The peer-to-peer communication feature of the PEX 8524 allows these modules to communicate with each other without any centralized control. Figure 4. Embedded Systems Peer to Peer Communication Figure 5 represents a backplane where the ExpressLane PEX 8524 provides peer-to-peer data exchange for a large number of line cards where the CPU/Host plays the management role. Figure 5. Peer-to-Peer Usage Graphics Fan-out Switch As PCIe based graphics cards become more mainstream, it will be necessary to take a x8 port on the root complex device and fan it out to two x8 ports for dual graphics applications. Root Complex (Northbridge) devices are available with multiple PCIe ports. These ports can be further expanded to connect to a larger number of I/Os or to support dual-graphics using the PEX 8524 as shown in Figure 6. Figure 6. Graphics Fan-out PCI Express Port Expansion The PEX 8524 enables designers to take, for example, two x8 PCIe ports and expand them into ten ports. Some of these PCIe ports can be bridged to PCI or PCI-X using bridging products from PLX. Figure 7 illustrates one of the many configurations the PEX 8524 can support. Figure 7. PCIe Port Expansion |
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