pex8516 PLX, pex8516 Datasheet

pex8516

Manufacturer Part Number

pex8516

Description

Flexible

Manufacturer

PLX

Datasheet

1.PEX8516.pdf (4 pages)

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Download datasheet (687Kb)

Features

PEX 8516 General Features

o 16-lane PCI Express switch

o Up to four configurable ports

o 27mmx27mm, 312 pin PBGA package

o Typical Power: 3.2 Watts

PEX 8516 Key Features

o Standard Compliant

o High Performance

o Non-Transparent Bridging

o Flexible Configuration

o PCI Express Power Management

o Quality of Service (QoS)

o Reliability, Availability,

- Integrated SerDes

- PCI Express Base Specification, r1.1

- Non-blocking switch fabric

- Full line rate on all ports

- Configurable Non-Transparent port

- Four highly flexible & configurable

- Configurable with strapping pins,

- Lane and polarity reversal

- Link power management states: L0,

- Device states: D0 and D3hot

- Two Virtual Channels per port

- Eight Traffic Classes per port

- Fixed and Round-Robin Virtual

Serviceability

- 4 Standard Hot-Plug Controllers

- Upstream port as hot-plug client

- Transaction Layer end-to-end CRC

- Poison bit

- Advanced Error Reporting

- Lane Status bits and GPO available

- Per port performance monitoring

- JTAG boundary scan

for Multi-Host or Intelligent I/O

Support

ports (x1, x2, x4, or x8)

EEPROM, or Host software

L0s, L1, L2/L3 Ready, and L3

Channel Port Arbitration

• Average packet size

• Number of packets

• CRC errors and more

Version 1.5 2007

Multi-purpose, Feature Rich ExpressLane™ PCI Express Switch

The ExpressLane

enabling users to add scalable high bandwidth, non-blocking interconnection to a

wide variety of applications including servers, storage systems, communications

platforms, blade servers, and embedded-control products. The PEX 8516 is well

suited for fan-out, aggregation, dual-graphics, peer-to-peer, and intelligent I/O

module applications.

Highly Flexible Port Configurations

The PEX 8516 offers highly configurable ports. There are a maximum 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 configured for symmetric (each

port having the same lane width and traffic load) or asymmetric (ports having

different lane widths) traffic. In the event of asymmetric traffic, the PEX 8516

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 (are asymmetric). Any of the ports

can be designated as the upstream port, which can be changed dynamically.

End-to-end Packet Integrity

The PEX 8516 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.

Non-Transparent “Bridging” in a PCI Express Switch

The ExpressLane PEX 8516 product supports full non-transparent bridging (NTB)

functionality to allow implementation of multi-host systems and intelligent I/O

modules in applications such as communications, storage, and blade servers. To

ensure quick product migration, the non-transparency features are implemented in

the same fashion as in standard PCI applications.

Non-transparent bridges allow systems to isolate memory domains by presenting the

processor subsystem as an endpoint, rather than another memory system. Base

address registers are used to translate addresses; doorbell registers are used to send

interrupts between the address domains; and scratchpad registers are accessible from

both address domains to allow inter-processor communication.

Two Virtual Channels

The ExpressLane PEX 8516 switch supports 2 full-featured Virtual Channels (VCs)

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

devices offer user-selectable Virtual Channel arbitration algorithms to enable users

to fine tune the Quality of Service (QoS) required for a specific application.

Low Power with Granular SerDes Control

The PEX 8516 provides low power capability that is fully compliant with the PCI

Express power management specification. In addition, the SerDes physical links can

be turned off when unused for even lower power.

Flexible & Versatile PCI Express Switch

PEX 8516

PEX 8516 device offers PCI Express switching capability

Related parts for pex8516

pex8516 Summary of contents

Page 1

... The PEX 8516 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. Non-Transparent “Bridging” PCI Express Switch ...

Page 2

... The ExpressLane PEX 8516 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 ...

Page 3

Adapter Card Aggregation The number and variety of PCI Express native-mode devices is growing quickly. As these devices become mainstream, it will be necessary to create multifunction and multi-port adapter cards with PCI Express capability. The PEX 8516 can be ...

Page 4

... Product Ordering Information Part Number Description PEX8516-BB25BI 16 Lane, 4 Port PCIe Switch, 312-ball PBGA 27x27mm pkg PEX8516-BB25BI G 16 Lane, 4 Port PCIe Switch, 312-ball PBGA 27x27mm pkg, Pb-free PEX 8516RDK-4 PEX 8516 Rapid Development Kit with x4 Connector PEX 8516RDK-1 PEX 8516 Rapid Development Kit with x4 Connector and x1 Adapter http://www ...

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