电子工程世界电子工程世界电子工程世界

产品描述

搜索
 

PEX8516-BB25BIG

器件型号:PEX8516-BB25BIG
厂商名称:PLX Technology, Inc. (Broadcom )
下载文档

器件描述

Flexible & Versatile PCI Express Switch

文档预览

PEX8516-BB25BIG器件文档内容

Version 1.4 2006

                  PEX 8516

              Not recommended
              for new designs
please use PEX8518 for new designs
Version 1.4 2006

Features                                           PEX 8516

PEX 8516 General Features                     Flexible & Versatile PCI Express Switch

  o 16-lane PCI Express switch                Multi-purpose, Feature Rich ExpressLaneTM PCI Express Switch
     - Integrated SerDes
                                              The ExpressLane PEX 8516 device offers PCI Express switching
  o Up to four configurable ports             capability enabling users to add scalable high bandwidth, non-blocking
  o 27mmx27mm, 312 pin PBGA package           interconnection to a wide variety of applications including servers,
  o Maximum Power: 4.36 Watts                 storage systems, communications platforms, blade servers, and
                                              embedded-control products. The PEX 8516 is well suited for fan-out,
PEX 8516 Key Features                        aggregation, peer-to-peer, and intelligent I/O module applications.

  o Standards Compliant                       Highly Flexible Port Configurations
     - PCI Express Base Specification, r1.0a  The ExpressLane PEX 8516 offers highly configurable ports. There are a maximum
     - PCI SHPC Specification, r1.0           of 4 ports that can be configured to any legal width from x1 to x8, in any
                                              combination to support your specific bandwidth needs. The ports can be symmetric
  o High Performance                          (each port having the same lane width) or asymmetric (ports having different lane
     - Non-blocking switch fabric             widths). Any of the ports can be designated as the upstream port, which can be
     - Full line rate on all ports            changed dynamically.

  o Non-Transparent Bridging                  End-to-end Packet Integrity
     - Configurable Non-Transparent port      The ExpressLane PEX 8516 provides end-to-end CRC protection (ECRC) and
        for Multi-Host or Intelligent I/O     Poison bit support to enable designs that require guaranteed error-free packets.
        Support                               These features are optional in the PCI Express specification, but PLX provides them
                                              across its entire ExpressLane switch product line.
  o Flexible Configuration
     - Four highly flexible & configurable    Non-Transparent "Bridging" in a PCI Express Switch
        ports (x1, x2, x4, or x8)             The ExpressLane PEX 8516 product supports full non-transparent bridging (NTB)
     - Configurable with strapping pins,      functionality to allow implementation of multi-host systems and intelligent I/O
        EEPROM, or Host software              modules in applications such as communications, storage, and blade servers. To
     - Lane and polarity reversal             ensure quick product migration, the non-transparency features are implemented in
                                              the same fashion as in standard PCI applications.
  o PCI Express Power Management
     - Link power management states: L0,      Non-transparent bridges allow systems to isolate memory domains by presenting the
        L0s, L1, L2/L3 Ready, and L3          processor subsystem as an endpoint, rather than another memory system. Base
     - Device states: D0 and D3hot            address registers are used to translate addresses; doorbell registers are used to send
                                              interrupts between the address domains; and scratchpad registers are accessible from
  o Quality of Service (QoS)                  both address domains to allow inter-processor communication.
     - Two Virtual Channels per port
     - Eight Traffic Classes per port         Two Virtual Channels
     - Fixed and Round-Robin Virtual          The ExpressLane PEX 8516 switch supports 2 full-featured Virtual Channels (VCs)
        Channel Port Arbitration              and a full 8 Traffic Classes (TCs). The mapping of Traffic Classes to port-specific
                                              Virtual Channels allows for different mappings for different ports. In addition, the
  o Reliability, Availability,                devices offer user-selectable Virtual Channel arbitration algorithms to enable users
     Serviceability                           to fine tune the Quality of Service (QoS) required for a specific application.
     - 4 Standard Hot-Plug Controllers
     - Upstream port as hot-plug client       Low Power with Granular SerDes Control
     - Transaction Layer end-to-end CRC       The ExpressLane PEX 8516 provides low power capability that is fully compliant
     - Poison bit                             with the PCI Express power management specification. In addition, the SerDes
     - Advanced Error Reporting in addition   physical links can be turned off when unused for even lower power.
        to PCIe baseline error reporting
     - Lane Status bits and GPO available
     - Per port performance monitoring
         Average packet size
         Number of packets
         CRC errors and more
     - JTAG boundary scan
Flexible Port Width Configuration                                strength in a system. The PLX SerDes implementation
The lane width for each port can be individually configured      supports four levels of power off, low, typical, and high. The
through auto-negotiation, hardware strapping, upstream           SerDes block also supports loop-back modes and advanced
software configuration, or through an optional EEPROM.           reporting of error conditions, which enables efficient debug
                                                                 and management of the entire system.
The PEX 8516 supports a large number of port configurations.
For example, if you are using the PEX 8516 in a fan-out          Flexible Virtual Channel Arbitration
application, you may configure the upstream port as x8 and       The ExpressLane PEX 8516 switches support hardware fixed
the downstream ports as three x2 ports; two x2 & one x4          and Round Robin arbitration schemes for two virtual
ports; three x1 ports; or other combinations, as long as you     channels on each port. This allows for the fine tuning of
don't run out of lanes (16) or ports (4). In a port aggregation  Quality of Service for efficient use of packet buffers and
application you can configure three x2 or x1 ports for           system bandwidth.
aggregation into one x8 or x4 port. Figure 1 shows the most
common port configurations.                                      Applications

                                                                 Suitable for host-centric as well as intelligent I/O
                                                                 applications ExpressLane PEX 8516 can be configured for a
                                                                 wide variety of form factors and applications.

                                                                 Host-Centric Fan-out
                                                                 The ExpressLane PEX 8516 switch, with its symmetric or
                                                                 asymmetric lane configuration capability, allows user specific
                                                                 tuning to a variety of host-centric as well as peer-to-peer
                                                                 applications.

          Figure 1. Common Port Configurations                                      Figure 2. Fan-in/out Usage

Hot Plug for High Availability                                   Figure 2 shows a typical server-based design, where the root
Hot plug capability allows users to replace hardware modules     complex provides a PCI Express link that needs to be fanned
and perform maintenance without powering down the system.        into a larger number of smaller ports for a variety of I/O
The PEX 8516 hot plug capability and Advanced Error              functions, each with different bandwidth requirements.
Reporting features makes it suitable for High Availability
(HA) applications. Each downstream port includes a Standard      In this example, the PEX 8516 would typically have an 8-lane
Hot Plug Controller. If the PEX 8516 is used in an application   upstream port, and as many as 3 downstream ports. The
where one or more of its downstream ports connect to PCI         downstream ports can be of differing widths if required. The
Express slots, each port's Hot Plug Controller can be used to    figure also shows how some of the ports can be bridged to
manage the hot-plug event of its associated slot. Furthermore,   provide PCI or PCI-X slots through the use of the
its upstream port is a hot-plug client, allowing it to be used   ExpressLane PEX 8114 and PEX 8111 PCIe bridging
on hot-pluggable adapter cards, backplanes, and fabric           devices.
modules.
                                                                 Adapter Card Aggregation
Fully Compliant Power Management                                 The number and variety of PCI Express native-mode devices
For applications that require power management, the PEX          is growing quickly. As these devices become mainstream, it
8516 device supports both link (L0, L0s, L1, L2/L3 Ready,        will be necessary to create multifunction and multi-port
and L3) and device (D0 and D3hot) power management states,       adapter cards with PCI Express capability.
in compliance with the PCI Express power management
specification.

SerDes Power and Signal Management
The ExpressLane PEX 8516 supports software control of the
SerDes outputs to allow optimization of power and signal
The PEX 8516 can be used to create an adapter or mezzanine        Dual Host/Fabric Model
card that aggregates the PCI Express devices into a single port   The ExpressLane PEX 8516 supports applications requiring
that can be plugged into a backplane or motherboard. Figure 3     dual host, host failover, and load-sharing applications
shows the PEX 8516 in this application.                           through the non-transparency feature. Figure 5 illustrates a
                                                                  dual host system with dual switch fabric in dual-star
            Figure 3. Aggregation Adapter Card                    configuration.
The adapter card in Figure 3 can be transparent, in which
case the PCI Express I/O devices are just standard I/O            The redundancy of the host and the fabric can be achieved
endpoints such as Ethernet or Fibre Channel. Or the PEX 8516      through many possible configurations using NTB function of
can provide a non-transparent port to the system (via the         PEX 8516. In the configuration shown below the host 1
card's edge connector). In this case, one of the PCI Express      controls the switch 1 and associated I/Os and the host 2
devices can be a CPU or other "intelligent" device with on-       controls the switch 2 and associated I/Os. The hosts and
chip processing capability thus needing address domain          switches are isolated using NTB functionality of PEX 8516 on
isolation from the rest of the system. This approach is           the host boards. If one of the hosts fails the surviving host can
commonly used in RAID controllers.                                remove the failing host from the configuration while
Intelligent Adapter Card                                          controlling both the switches and all I/Os. Similarly, if one of
The PEX 8516 supports the non-transparency feature. Figure        the switches fails the host associated with that switch can send
4 illustrates a host system using an intelligent adapter card.    control messages to its I/Os through the surviving switch using
                                                                  NTB function.

                                                                                Figure 5. Dual Host/Fabric Mode
                                                                  Embedded Systems
                                                                  The PEX 8516 can also be utilized in embedded applications.
                                                                  Figure 6 shows several independent modules connecting
                                                                  through the PEX 8516. The port widths for each module can
                                                                  be configured as required. The Peer-to-peer communication
                                                                  feature of the PEX 8516 allows these modules to communicate
                                                                  with each other without any centralized control.

             Figure 4. Intelligent Adapter Usage                  Figure 6. Embedded Systems

In this figure, the CPU on the adapter card is isolated from the
host CPU. The PEX 8516 non-transparent port allows the two
CPUs to be isolated but communicate with each other through
various registers that are designed in the PEX 8516 for that
purpose. The host CPU can dynamically re-assign both the
upstream port and the non-transparent port of PEX 8516
allowing the system to be reconfigured.
Software Usage Model                                              Interrupt Sources/Events
                                                                  The PEX 8516 supports the INTx interrupt message type
From a system model viewpoint, each PCI Express port is a         (compatible with PCI 2.3 Interrupt signals) or Message
virtual PCI to PCI bridge device and has its own set of PCI       Signaled Interrupts (MSI) when enabled. Interrupts/messages
Express configuration registers. It is through the upstream port  are generated by PEX 8516 for hot plug events, doorbell
that the BIOS or host can configure the other ports using         interrupts, baseline error reporting, and advanced error
standard PCI enumeration. The virtual PCI to PCI bridges          reporting.
within the PEX 8516 are compliant to the PCI and PCI
Express system models. The Configuration Space Registers          ExpressLaneTM PEX 8516RDK
(CSRs) in a virtual primary/secondary PCI to PCI bridge are       The RDK hardware module includes the PEX 8516 with one
accessible by type 0 configuration cycles through the virtual     x4 (card-edge slot) port and three additional x4 ports (see
primary bus interface (matching bus number, device number,        Figure 7). The RDK is available with x4 card edge connector
and function number).                                             and adapters for x1 edge connectors are available to plug the
                                                                  RDK into smaller slots. The PEX 8516RDK hardware module
Development Tools                                                 can be installed in a motherboard, used as a riser card, or
                                                                  configured as a bench-top board. The PEX 8516RDK can be
PLX offers hardware and software tools to enable rapid            used to test and validate customer software. Additionally, it
customer design activity. These tools consist of a hardware       can be used as an evaluation vehicle for PEX 8516 features
module (PEX 8516RDK), hardware documentation, and a               and benefits.
Software Development Kit (SDK).
                                                                  SDK
                     Figure 7. PEX 8516RDK                        The SDK tool set
                                                                  includes:

                                                                    - Linux & Windows
                                                                       drivers

                                                                    - C/C++ Source code,
                                                                       Objects, libraries

                                                                    - User's Guides &
                                                                       Application examples

                           Product Ordering Information

PLX Technology, Inc.       Part Number       Description
870 Maude Ave.             PEX8516-BB25BI    16 Lane, 4 Port PCIe Switch, 312-ball PBGA 27x27mm pkg
Sunnyvale, CA 94085 USA    PEX8516-BB25BI G  16 Lane, 4 Port PCIe Switch, 312-ball PBGA 27x27mm pkg, Pb-free
Tel: 1-800-759-3735        PEX 8516RDK-4     PEX 8516 Rapid Development Kit with x4 Connector
Tel: 1-408-774-9060        PEX 8516RDK-1     PEX 8516 Rapid Development Kit with x4 Connector and x1 Adapter
Fax: 1-408-774-2169
Email: info@plxtech.com    Please visit the PLX Web site at http://www.plxtech.com or contact PLX sales at 408-774-9060 for sampling.
Web Site: www.plxtech.com

2006 PLX Technology, Inc. All rights reserved. PLX and the PLX logo are registered trademarks of PLX Technology, Inc. ExpressLane is a trademark of PLX Technology,
Inc., which may be registered in some jurisdiction. All other product names that appear in this material are for identification purposes only and are acknowledged to be
trademarks or registered trademarks of their respective companies. Information supplied by PLX is believed to be accurate and reliable, but PLX Technology, Inc. assumes no
responsibility for any errors that may appear in this material. PLX Technology, Inc. reserves the right, without notice, to make changes in product design or specification.

PEX8516-SIL-PB-P1-1.4                                                                                                                  08/06
This datasheet has been downloaded from:
             www.EEworld.com.cn

                 Free Download
           Daily Updated Database
      100% Free Datasheet Search Site
  100% Free IC Replacement Search Site
     Convenient Electronic Dictionary

               Fast Search System
             www.EEworld.com.cn

                                                 All Datasheets Cannot Be Modified Without Permission
                                                                Copyright Each Manufacturing Company
小广播

About Us 关于我们 客户服务 联系方式 器件索引 网站地图 最新更新 手机版

站点相关: 大学堂 TI培训 Datasheet 电子工程

北京市海淀区知春路23号集成电路设计园量子银座1305 电话:(010)82350740 邮编:100191

电子工程世界版权所有 京ICP证060456号 京ICP备10001474号 电信业务审批[2006]字第258号函 京公海网安备110108001534 Copyright © 2005-2020 EEWORLD.com.cn, Inc. All rights reserved