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PEX8524VRDK-8 Datasheet(PDF) 2 Page - PLX Technology |
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PEX8524VRDK-8 Datasheet(HTML) 2 Page - PLX Technology |
2 / 4 page Flexible Port Width Configuration The lane width for each port can be individually configured through auto-negotiation, hardware strapping, upstream software configuration, or through an optional EEPROM. The PEX 8524V supports a large number of port configurations. For example, if you are using the PEX 8524V in a fan-out application, you may configure the upstream port as x8 and the downstream ports as four x4 ports; two x8 ports for dual-graphics fan-out; or other combinations, as long as you don’t run out of lanes (24) or ports (6). In a peer-to-peer application you can configure all six ports as x4. Figure 1 shows the most common port configurations. Figure 1. Common Port Configurations Hot Plug for High Availability Hot plug capability allows users to replace hardware modules and perform maintenance without powering down the system. The PEX 8524V hot plug capability and Advanced Error Reporting features makes it suitable for High Availability (HA) applications. Each downstream port includes a Standard Hot Plug Controller. If the PEX 8524V is used in an application where one or more of its downstream ports connect to PCI Express slots, each port’s Hot Plug Controller can be used to manage the hot-plug event of its associated slot. Furthermore, its upstream port is a hot-plug client, allowing it to be used on hot-pluggable adapter cards, backplanes, and fabric modules. Fully Compliant Power Management For applications that require power management, the PEX 8524V device supports both link (L0, L0s, L1, L2/L3 Ready, and L3) and device (D0 and D3hot) power management states, in compliance with the PCI Express power management specification. SerDes Power and Signal Management The ExpressLane PEX 8524V supports software control of the SerDes outputs to allow optimization of power and signal strength in a system. The PLX SerDes implementation supports four levels of power – off, low, typical, and high. The SerDes block also supports loop-back modes and advanced reporting of error conditions, which enables efficient debug and management of the entire system. Flexible Virtual Channel Arbitration The ExpressLane PEX 8524V switches support hardware fixed and Round Robin arbitration schemes for two virtual channels on each port. This allows for the fine tuning of Quality of Service for efficient use of packet buffers and system bandwidth. Applications Suitable for host-centric as well as peer-to-peer traffic patterns, the PEX 8524V can be configured for a wide variety of form factors and applications. Host-Centric Fan-out The PEX 8524V, with its symmetric or asymmetric lane configuration capability, allows user specific tuning to a variety of host-centric applications. Figure 2. Fan-in/out Usage Figure 2 shows a typical server-based design, where the root complex provides a PCI Express link that needs to be fanned into a larger number of smaller ports for a variety of I/O functions, each with different bandwidth requirements. In this example, the PEX 8524V would typically have an 8- lane upstream port, and as many as 5 downstream ports (4 shown here). The downstream ports can be of differing widths if required. The figure also shows how some of the ports can be bridged to provide PCI or PCI-X slots through the use of the ExpressLane PEX 8114 and PEX 8111 PCIe bridging devices. |
Similar Part No. - PEX8524VRDK-8 |
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Similar Description - PEX8524VRDK-8 |
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