PEX8716 Datasheet, PDF (1/5 Pages) AVAGO TECHNOLOGIES LIMITED – PCI Express Gen 3 Switch

PEX 8716, PCI Express Gen 3 Switch, 16 Lanes, 4 Ports
Highlights
ƒ PEX 8716 General Features
o 16-lane, 4-port PCIe Gen 3 switch
- Integrated 8.0 GT/s SerDes
o 19 x 19mm², 324-pin FCBGA package
o Typical Power: 4.0 Watts
ƒ PEX 8716 Key Features
o Standards Compliant
- PCI Express Base Specification, r3.0
(compatible w/ PCIe r1.0a/1.1 & 2.0)
- PCI Power Management Spec, r1.2
- Microsoft Vista Compliant
- Supports Access Control Services
- Dynamic link-width control
- Dynamic SerDes speed control
o High Performance
♦ performancePAK
9 Read Pacing (bandwidth throttling)
9 Multicast
9 Dynamic Buffer/FC Credit Pool
- Non-blocking switch fabric
- Full line rate on all ports
- Packet Cut-Thru with 112ns max packet
latency (x4 to x4)
- 2KB Max Payload Size
o Flexible Configuration
- Ports configurable as x1, x2, x4, x8
- Registers configurable with strapping
pins, EEPROM, I²C, or host software
- Lane and polarity reversal
- Compatible with PCIe 1.0a PM
o Multi-Host & Fail-Over Support
- Configurable Non-Transparent (NT) port
- Failover with NT port
- Up to 2 upstream/Host ports with 1+1 or
N+1 failover to other upstream ports
o Quality of Service (QoS)
- Eight traffic classes per port
- Weighted round-robin source
port arbitration
o Reliability, Availability, Serviceability
♦ visionPAK
9 Per Port Performance Monitoring
ƒ Per port payload & header counters
9 SerDes Eye Capture
9 PCIe Packet Generator
9 Error Injection and Loopback
- 3 Hot Plug Ports with native HP Signals
- All ports hot plug capable thru I²C
(Hot Plug Controller on every port)
- ECRC and Poison bit support
- Data Path parity
- Memory (RAM) Error Correction
- INTA# and FATAL_ERR# signals
- Advanced Error Reporting
- Port Status bits and GPIO available
• Per port error diagnostics
- JTAG AC/DC boundary scan
The ExpressLane™ PEX 8716 device offers Multi-Host PCI Express
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, communications, and graphics platforms. The PEX 8716 is
well suited for fan-out, aggregation, and peer-to-peer traffic patterns.
Multi-Host Architecture
The PEX 8716 employs an enhanced version of PLX’s field tested PEX 8616
PCIe switch architecture, which allows users to configure the device in legacy
single-host mode or multi-host mode with up to two 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, or clustered systems.
High Performance & Low Packet Latency
The PEX 8716 architecture supports packet cut-thru with a maximum
latency of 112ns (x4 to x4). 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 8716 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 8716’s 4 ports can
be configured to lane widths
of x1, x2, x4, or x8. 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
8716’s common port
configurations in legacy
Single-Host mode.
x4
x8
PEX 8716
PEX 8716
3 x4
x4
x4 x4
x8
PEX 8716
PEX 8716
NT
x4 x2 x2
x8
Figure 1. Common Port Configurations
© PLX Technology, www.plxtech.com
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10/20/2010, Version 1.0