Software Usage Model
From a system model viewpoint, each PCI Express port is a
virtual PCI to PCI bridge device and has 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 8525 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).
Interrupt Sources/Events
The PEX 8525 switch supports the INTx interrupt message
type (compatible with PCI 2.3 Interrupt signals) or Message
Signaled Interrupts (MSI) when enabled. Interrupts/messages
are generated by PEX 8525 for hot plug events, doorbell
interrupts, baseline error reporting, and advanced error
reporting.
Development Tools
PLX offers hardware and software tools to enable rapid
customer design activity. These tools consist of a hardware
module (PEX 8525 RDK), hardware documentation, and a
Software Development Kit (SDK).
ExpressLane
PEX 8525 RDK
The RDK hardware module includes the PEX 8525 with one
x8 (card-edge slot) port, two x4 ports and one x8 port (see
Figure 8). The RDK is available with a x8 card edge
connector/adapter. The adapters for x4 and x1 edge connectors
are available to plug the RDK in smaller slots. The PEX 8525
RDK board can be installed on a motherboard or used as a
riser card. The PEX 8525 RDK can be used to test and
validate customer software. Additionally, it can be used as an
evaluation vehicle for the PEX 8525 features and benefits. The
PEX 8525 RDK provides everything that a user needs to get
their hardware and software development started.
HotPlug
Ckt
Port 8 Status LED
PORT 8 - X8
HD Power
Connector
Port 10 Status LED
Manual
Reset
Port 9 Status LED
PORT 9 - X4
PORT 10 - X4
SDK
Midbus Site
JTAG
DIP Switch
for Config
PEX 8525
RefClk
EEPROM
Midbus Site
PERST#
Port 1 – x8
(Upstream Port)
The SDK tool set
includes:
-
Linux & Windows
drivers
-
C/C++ Source code,
Objects, libraries
-
User’s Guides &
Application examples
Windows/Linux Apps
User
Space
PEX API
Kernel
Space
PCIe
Driver
PnP
Driver
Hardware
PCI Express Interface
Figure 8. PEX 8525 RDK
PLX Technology, Inc.
870 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
Product Ordering Information
Part Number
PEX 8525-AA25BI
PEX 8525-AA25BI G
PEX 8525-AA RDK
Description
24-Lane PCI Express Switch (31x31mm
2
)
24-Lane PCI Express Switch, Pb-Free (31x31mm
2
)
PEX 8525 Rapid Development Kit w/ x8 Edge Connector
Please visit the PLX Web site at
http://www.plxtech.com
or contact PLX sales at 408-774-9060 for sampling.
© 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 the right, without notice, to make changes in product design or specification.
PLX Confidential
8525-SIL-PB-P-1.2
01/07
PLX [ PLX TECHNOLOGY ]
