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Version 1.0 2007 Features PEX 8505 General Features o 5-lane PCI Express switch - Gen 1 (2.5Gbps) Integrated SerDes o Up to 5 ports (x1, x2) o 15mm x 15mm, 196-ball PBGA pkg. o Typical Power: 0.8 Watts PEX 8505 Key Features o Standards Compliant - PCI Express Base Specification, r1.1 - PCI Power Management Interface Specification r1.2 o High Performance - Cut-thru with low packet latency - Max Payload Size of 1024 Bytes - Non-blocking internal architecture - Full line rate on all ports o Flexible Configuration - Five flexible & configurable ports (x1, x2) - Lane and polarity reversal - Configurable with strapping pins, EEPROM, I2C or Host software o PCI Express Power Management - Link power management states: L0, L0s, L1, L2/L3 Ready and L3 - Device states: D0 and D3hot o Quality of Service (QoS) - One Virtual Channel per port - Eight Traffic Classes per port - Weighted Round-Robin Ingress Port Arbitration o Reliability, Availability, Serviceability - 3 Standard Hot-Plug Controllers supporting PCI SHPC spec r1.0 - Transaction layer end-to-end CRC - Poison bit support - Basic and Advanced Error Reporting support - Per port error diagnostics * Bad DLLPs * Bad TLPs * CRC errors and more - Fatal Error (FATAL_ERR#) signal (legacy SERR equivalent) - INTA# signal - Port status bits - Eight software controllable General Purpose Output (GPO) signals - JTAG boundary scan PEX 8505 Flexible & Versatile PCI Express(R) Switch Low-Power 5-Lane, 5-Port ExpressLaneTM PCIe Switch The PEX 8505 device offers PCI Express switching capability conforming to the PCI Express Base specification revision 1.1. This device enables users to add scalable high bandwidth, non-blocking interconnects at the lowest cost to a wide variety of applications including communications platforms, consumer products, servers, storage systems, blade servers, industrial systems and embedded-control products. The PEX 8505 can be used as a fan-out, or peer-to-peer switch, and is well-suited for Control Plane Applications, I/O Expansion, Video Surveillance, MultiFunction Printers, DVRs, Industrial Control Systems, Medical Imaging Systems, Embedded Systems and AMC modules. Port Configurations The PEX 8505 offers five lanes and up to five ports supporting x1 and x2 lane widths. The PEX 8505 features a flexible central packet memory that allocates a memory buffer for each port as required by the application or endpoint. This buffer allocation along with the device's flexible packet flow control minimizes bottlenecks when the upstream and aggregated downstream bandwidths do not match. High Performance The PEX 8505 architecture supports packet cut-thru with low latency (138ns). This, combined with large packet memory (up to 1024 byte maximum payload size) and non-blocking internal switch architecture, provides full line rate on all ports for performance hungry applications such as docking stations, control planes, embedded systems and AMC modules. End-to-End Packet Integrity The PEX 8505 provides end-to-end CRC protection (ECRC) and Poison-bit support to enable designs that require end-to-end data integrity. These features are optional in the PCI Express specification, but PLX provides them across its entire ExpressLane switch product line. Configuration Flexibility The PEX 8505 provides several ways to configure its operations. The device can be configured through strapping pins, I2C interface, CPU configuration cycles, or an optional serial EEPROM. This allows for easy debug during the development phase, performance monitoring during the operation phase, and driver or software upgrade. Interoperability The PEX 8505 is designed to be fully compliant with the PCI-SIG PCI Express base specification revision 1.1. Additionally, it supports auto-negotiation, lane reversal, and polarity reversal. The PEX 8505 also undergoes thorough Interoperability testing in PLX's Interoperability Lab. Low Power with Granular SerDes Control The PEX 8505 provides low power capability that is fully compliant with the PCI Express power management specification. For even lower power, the SerDes physical links can be programmed for desired power or turned off when unused. www.plxtech.com Port Configurations The lane width of each port can be individually configured through auto-negotiation, hardware strapping, host software configuration, I2C interface, or through an optional EEPROM. The PEX 8505 supports three port configurations: 1) One x1 upstream port and four x1 downstream ports 2) One x2 upstream port and three x1 downstream ports 3) One x2 upstream port, one x2 downstream port, one x1 downstream port SerDes Power and Signal Management The ExpressLane PEX 8505 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. Port Arbitration The PEX 8505 switch supports hardware fixed and Weighted Round-Robin Ingress Port Arbitration. This allows fine tuning of Quality of Service and efficient use of packet buffers and the system bandwidth. x1 PEX 8505 Applications Suitable for control plane applications, multi-function printers, DVRs, industrial control systems, medical imaging systems, embedded systems & AMC modules, the PEX 8505 can be configured for a wide variety of form factors and applications. x1 x1 x1 x1 Control Plane Application x1 x2 PEX 8505 PEX 8505 The PEX 8505 is ideal for migrating existing PCI control planes in routers to high-speed PCI Express interface to meet increased packet processing needs. Figure 2 shows a controller card with a PEX 8505 connecting the Control Processor to as many as four devices each via a x1 port. This usage model provides connectivity to multiple devices giving the processor control over multiple devices in mid-range routers. ASIC FPGA x1 x1 x1 x2 x1 FPGA PEX 8505 Figure 1. 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 8505 Hot-Plug capability and Advanced Error Reporting features make it suitable for High Availability (HA) applications. Ports 1, 2 & 3 include a Standard HotPlug Controller. If the PEX 8505 is used in an application where one or more of its downstream ports connect to PCI Express slots, Hot-Plug Controllers on the three downstream ports can be used to manage the hot plug event of its associated slot. Control Processor Memory ASIC Figure 2. Control Plane I/O Expansion The PEX8505 can be used in I/O expansion applications. Together with a PCI Express-to-PCI bridge, the PEX8505 is capable of providing legacy PCI I/O expansion support. Each x1 port in the PEX8505 provides 250MB/s bandwidth per direction and it is more than capable of supporting the various bus widths and bus speeds of legacy PCI. Please visit the www.plxtech.com/bridges for additional information on PLX's PCI Express bridge family. Fully Compliant Power Management For applications that require power management, the ExpressLane PEX 8505 devices support 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. www.plxtech.com South Bridge Scanner PCIe Slot or Cable End Point PEX 8505 x1 Proprietary ASIC x1 Stereo CODEC VIA 17242 PCI Bus PEX 8111 Processor x1 PCIe Sound Card PEX 8505 x1 x1 PCIe TV Tuner Card Philips Hybrid Tuner IF CVBS 2IF Conexant CX23882 PCI Bus Ethernet Proprietary ASIC Marking Engine Conexant Demod CX22702 TS PEX 8111 Figure 3. I/O Expansion Video Surveillance A video surveillance application is another example for an embedded application. When used together with a PEX8311, PCI Express-to-local bus bridges, the PEX8505 can connect to other embedded devices, such as FPGAs. This allows video capture devices to interface to a PCI Express host taking advantage of the PCI Express performance. For more information on the PCI Express-to-Local Bus bridge, please visit PLX's website at www.plxtech.com/bridges. Camera CPU Figure 5. Printer Engine Software Usage Model From a system model viewpoint, each PCI Express port is a virtual PCI to PCI bridge device with its own set of PCI Express configuration registers. It is through the upstream port that the BIOS or host can configure the other ports using standard PCI enumeration. The virtual PCI to PCI bridges within the PEX 8505 are compliant to the PCI and PCI Express system models. The Configuration Space Registers (CSRs) in a virtual primary/secondary PCI to PCI Bridge are accessible by type 0 configuration cycles through the virtual primary bus interface (matching bus number, device number, and function number). Camera JPEG FIFO FPGA PEX 8311 Camera . . CPU JPEG FIFO FPGA PEX 8505 Control Processor Interrupt Sources/Events The ExpressLane PEX 8505 switch supports the INTx interrupt message type (compatible with the PCI 2.3 Interrupt signals) or Message Signaled Interrupts (MSI) when enabled. Interrupts/messages are generated by the PEX 8505 for hot plug events, baseline error reporting, and advanced error reporting. Camera Camera PEX 8311 Camera Figure 4. Video Surveillance Printer Application In a printer application, low power and low latency devices are commonly used. Figure 5 shows an example of a printer application. In this example, the low power processor used provides a limited number of PCI Express ports. The PEX 8505 can be used to provide four additional PCI Express ports for the connectivity of other system peripherals such as Ethernet as well any proprietary PCI Express based ASICs. The Peer-to-Peer feature in the PEX 8505, allows a peripheral connected on a downstream port the ability to transfer data directly to another peripheral device. As shown in Figure 5, the ASIC connected to the scanner side can transfer data directly to the PCIe Slot and/or the ASIC connected on the Marking Engine side resulting in a low latency data transfer. In this case, the processor is not directly involved in the transfer. www.plxtech.com Development Tools PLX offers the PEX 8505RDK which includes hardware and software tools to enable rapid customer design activity. These tools consist of a hardware module, hardware documentation and a Software Development Kit (SDK). PEX 8505RDK J 5 ExpressLane PEX 8505RDK The RDK hardware includes three modules: the PEX 8505 base board, the Port Expander which provides four x1 ports, and a PCI Express adapter board which provides connection to the Host slot. The PEX 8505RDK hardware module is configured as a bench-top board to provide 5 ports. The adapter board routes the PCI Express signals from the Host slot to a standard (PCI SIG defined) PCI Express x1 cable connector. The connection between the PEX 8505 and the host is made via the x1 cable. The PEX 8505RDK can be used to test and validate customer software. Additionally, it can be used as an evaluation vehicle for the PEX 8505 features and benefits. P 1 PEX 8505 RDK Slot PCIe x1 cable connector x1 ATX x1 Port Expander x1 SDK The SDK tool set includes: - Linux and Windows drivers - C/C++ Source code, Objects, libraries - User's Guides, Application examples, Tutorials PCIe x1 cable connector ATX Cable Adapter Board CPWRON # PwdGd x1 Windows/Linux Apps User Space CPERST # CPRSTN # PEX API Kernel Space PCIe Driver NT PnP Driver RefClk CREFCLK REFCLK PERST # Hardware PCI Express Interface Figure 6. PEX 8505RDK Product Ordering Information PLX Technology, Inc. 870 W. Maude Ave. Sunnyvale, CA 94085 USA Tel: 1-800-759-3735 Tel: 1-408-774-9060 Fax: 1-408-774-2169 Email: info@plxtech.com Web Site: www.plxtech.com Part Number PEX 8505-AA25BI PEX 8505-AA25BI G PEX 8505RDK Description 5-Lane, 5-port PCI Express Switch 5-Lane, 5-port PCI Express Switch Pb-Free PEX 8505 Rapid Development Kit Please visit the PLX Web site at www.plxtech.com or contact PLX sales at 408-774-9060 for sampling. (c) 2007 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 thewww.plxtech.com make changes in product design or specification. right, without notice, to 8505-SIL-PB-1.0 March 2007 |
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