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PCI-Slide8

The basic PCI Express Topology includes 4 major components including the root complex, bridges, switches and endpoints. The root complex is the device that connects the CPU and memory subsystem to the total PCI Express fabric, and can support one or more PCI Express ports. The example in this slide has 3 ports. A bridge device creates a bridge between PCI Express and another standard, typically a PCI or PCI-X hierarchy. A switch is used to expand the PCI Express fabric, utilizing virtual PCI to PCI bridges as seen in the slide. Endpoint devices are simply peripheral devices that are either requesters or completers of PCI Express transactions.

PTM Published on: 2011-11-10