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Chapter 3
Hardware Overview
NI PCIe-8388
PCI
Express
Repeaters
Functional Unit Descriptions
PCI Express x16 Board Edge Connector
PCI Express Switch
MXI-Express x16 for PXI Express Series User Manual
Cabled
PCI
Express
x16
Connector
x16
Copper
Cable
Figure 3-1. MXI-Express x16 Block Diagram
You can use the board edge connector to use the NI PCIe-8388 in a x16
PCI Express slot in a PC. The PCI Express Card Electromechanical
Specification defines this connector.
The PCI Express Base Specification defines a PCI Express switch
as a logical collection of PCI Express-to-PCI Express bridge devices.
NI PCIe-8388 does not contain a PCI Express switch. It uses PCI Express
repeaters to drive the PCI Express signals over the PCI Express cable. The
PCI Express switch is on the NI PXIe-8388/9 board.
On the NI PXIe-8388/9, the switch upstream port is connected to the cable
PORT 1. One downstream port is connected to the SMBus Master, one x16
port is connected to PORT 2 (NI PCIe-8389 only), and four x4 ports or
one x8 and one x16 port are connected to the backplane, depending on
the chassis backplane configuration.
PORT 1 (upstream)
Cabled
PCI
Express
PCI
x16
Express
Connector
Switch
PORT 2 (downstream)
Cabled
PCI
Express
PCI Express
x16
to
Connector
PCI Bridge
3-2
NI PXIe-8388/89
4 x4 PCIe links or
1 x8, 1 x16
PCIe links
SMBus
Master
ni.com
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