PEX 8505-AA25BI PLX Technology, PEX 8505-AA25BI Datasheet - Page 2

• Manufacturer Part Number: PEX 8505-AA25BI
• Description: Versatile PCI Express Switch 196-Pin BGA
• Manufacturer: PLX Technology

Specifications of PEX 8505-AA25BI

• Package: 196BGA

Port Configurations
The lane width of each port can be individually configured
through auto-negotiation, hardware strapping, host software
configuration, I
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
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 Hot-
Plug 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.
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.
downstream port
x1 x1 x1
x1 x1 x1
PEX 8505
PEX 8505
PEX 8505
Figure 1. Port Configurations
x1
x1
2
C interface, or through an optional EEPROM.
x1 x1 x1 x1
x1 x1 x1 x1
x1 x1 x1 x1
PEX 8505
PEX 8505
PEX 8505
PEX 8505
x1
x1
x1
PEX 8505
PEX 8505
PEX 8505
x2
x2
x2
x2
x1
x1
www.plxtech.com
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.
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.
Control Plane Application
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.
I/O Expansion
The PEX 8505 can be used in I/O expansion applications.
Together with a PCI Express-to-PCI bridge, the PEX 8505 is
capable of providing legacy PCI I/O expansion support. Each
x1 port in the PEX 8505 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
PLX’s PCI Express bridge family.
FPGA
FPGA
Figure 2. Control Plane
ASIC
ASIC
PEX 8505
PEX 8505
ASIC
ASIC
for additional information on
FPGA
FPGA
Processor
Processor
Control
Control
Memory
Memory