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 8548 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, device, and function
number).
Interrupt Sources/Events
The PEX 8548 switch supports the INTx interrupt
message type (compatible with PCI 2.3 Interrupt signals)
or Message Signaled Interrupts (MSI) when enabled.
The PEX 8548 generates interrupts/messages 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 8548 RDK), hardware
documentation, and a Software Development Kit (SDK).
PORT 8 – X16
Port 8 Status
LED
Port 12 Status
LED
PORT 12 – X16
Manual
Reset
Port 0 Status
LED
ExpressLane
PEX 8548 RDK
The PEX 8548 RDK hardware module includes the PEX
8548 with one x16 upstream port and two x16
downstream ports (see Figure 6). The RDK comes with
two breakout boards which allow you to split each x16
downstream slot into three (x8, x4, x4) or two (x8, x8)
separate ports. Using the breakout boards, up to 6
downstream ports can be created. The PEX 8548 RDK
board can be installed on a motherboard or used as a
riser card. The PEX 8548 RDK can be used to test and
validate customer software. Additionally, it can be used
as an evaluation vehicle for PEX 8548 features and
benefits. The PEX 8548 RDK provides everything that a
user needs to get their hardware and software
development started.
SDK
The SDK tool set
includes:
-
Linux & Windows
drivers
-
C/C++ Source code,
Objects, libraries
-
User’s Guides &
Application
examples
HD Power
Connector
EEPROM
JTAG
DIP Switch
for Config
PEX 8548
RefClk
I
2
C
PERST#
Port 0 – x16
(Upstream Port)
Figure 6. PEX 8548 RDK
Product Ordering Information
Part Number
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
PEX 8548-AA25BI
PEX 8548-AA25BI G
PEX 8548-AA RDK
Breakout Board-88
Breakout Board-844
Description
48-Lane, 9-Port PCI Express Switch
48-Lane, 9-Port PCI Express Switch, Pb-Free
PEX 8548 Rapid Development Kit w/ x16 Edge Connector
Breakout Board w/ x16 Edge Connector for additional fan-out
to two slots (x8, x8)
Breakout Board w/ x16 Edge Connector for additional fan-out
to three slots (x8, x4, x4)
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.
PEX8548-SIL-PB-P1-1.5
01/07
PLX [ PLX TECHNOLOGY ]
