PEX 8664, PCI Express Gen 2 Switch, 64 Lanes, 16 Ports

Features

PEX 8664 General Features

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64-lane, 16-port PCIe Gen2 switch

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Integrated 5.0 GT/s SerDes

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35 x 35mm

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Typical Power: 7.9 Watts

PEX 8664 Key Features

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Standards Compliant

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PCI Express Base Specification, r2.0

(backwards compatible w/ PCIe r1.0a/1.1)

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PCI Power Management Spec, r1.2

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Microsoft Vista Compliant

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Supports Access Control Services

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Dynamic link-width control

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Dynamic SerDes speed control

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High Performance

♦ performancePAK

Read Pacing (bandwidth throttling)

Multicast

Dynamic Buffer/FC Credit Pool

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Non-blocking switch fabric

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Full line rate on all ports

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Packet Cut-Thru with 176ns max packet

latency (x16 to x16)

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2KB Max Payload Size

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Flexible Configuration

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Ports configurable as x1, x2, x4, x8, x16

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Registers configurable with strapping

pins, EEPROM, I

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Lane and polarity reversal

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Compatible with PCIe 1.0a PM

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Multi-Host & Fail-Over Support

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Configurable Non-Transparent (NT) port

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Failover with NT port

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Up to Five upstream/Host ports with 1+1

or N+1 failover to other upstream ports

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Quality of Service (QoS)

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Eight traffic classes per port

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Weighted round-robin source

port arbitration

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Reliability, Availability, Serviceability

♦ visionPAK

Per Port Performance Monitoring

Per port payload & header counters

SerDes Eye Capture

Error Injection and Loopback

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4 Hot Plug Ports with native HP Signals

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All ports hot plug capable thru I

(Hot Plug Controller on every port)

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ECRC and Poison bit support

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Data Path parity

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Memory (RAM) Error Correction

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INTA# and FATAL_ERR# signals

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Advanced Error Reporting

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Port Status bits and GPIO available

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Per port error diagnostics

The ExpressLane

switching capability enabling users to connect multiple hosts to their

respective endpoints via scalable, high bandwidth, non-blocking

interconnection to a wide variety of applications including servers,

storage systems, and communications platforms. The PEX 8664 is

well suited for fan-out, aggregation, and peer-to-peer applications.

Multi-Host Architecture

The PEX 8664 employs an enhanced version of PLX’s field tested PEX 8648

PCIe switch architecture, which allows users to configure the device in

legacy single-host mode or multi-host mode with up to five host ports

capable of 1+1 (one active & one backup) or N+1 (N active & one backup)

host failover. This powerful architectural enhancement enables users to build

PCIe based systems to support high-availability, failover, redundant and

clustered systems.

High Performance & Low Packet Latency

The PEX 8664 architecture supports packet cut-thru with a maximum

latency of 176ns (x16 to x16). This, combined with large packet memory,

flexible common buffer/FC credit pool and non-blocking internal switch

architecture, provides full line rate on all ports for performance-hungry

applications such as servers and switch fabrics. The low latency enables

applications to achieve high throughput and performance. In addition to low

latency, the device supports a packet payload size of up to 2048 bytes,

enabling the user to achieve even higher throughput.

Data Integrity

The PEX 8664 provides end-to-end CRC (ECRC) protection and Poison bit

support to enable designs that require end-to-end data integrity. PLX also

supports data path parity and memory (RAM) error correction circuitry

throughout the internal data paths as packets pass through the switch.

Flexible Configuration

The PEX 8664’s 16 ports can be

configured to lane widths of x1, x2, x4,

x8, or x16. Flexible buffer allocation,

along with the device's flexible packet

flow control, maximizes throughput

for applications where more traffic

flows in the downstream, rather than

upstream, direction. Any port can be

designated as the upstream port, which

can be changed dynamically. Figure 1

shows some of the PEX 8664’s

common port configurations in legacy

Single-Host mode.

Figure 1. Common Port Configurations

PEX 8664

PEX 8664

PEX 8664

PEX 8664

x4

PEX 8664

PEX 8664

PEX 8664

PEX 8664

x8

PEX 8664

PEX 8664

PEX 8664

PEX 8664

x8

PEX 8664

PEX 8664

PEX 8664

PEX 8664

x16

15 x4

4 x4

5 x8

10 x4

6 x8

2 x8

© PLX Technology, www.plxtech.com

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5/14/2009, Version 1.1