Figure 2. PXIe-8398 (156874x-01L) and PXIe-8399 (156874x-02L) Block Diagram
MXI-Express
Gen-3 x16
PCI Express Gen-3 x16
PCI Express Gen-3 x4
PCI Express Gen-3 x4
PCI Express Gen-3 x4
PCI Express Gen-3 x4
PCI Express
to
PCI Bridge
SMBus
Master
PCI Express
Switch
Note The width and speed of the PXI Express backplane links are chassis
dependent.
The PXIe-8398 and PXIe-8399 work in both two and four-link chassis. A four-link chassis
supports four links up to x4 width each, for a maximum of 16 PCI Express lanes. A two-link
chassis supports one link up to x8 and a second link up to x16, for a maximum of 24 PCI
Express lanes. The PXIe-8398 and PXIe-8399 maximize the use of all available backplane
lanes for either configuration.
Note National Instruments offers Gen 3 PXI Express chassis that allow the
PXIe-8398 and PXIe-8399 to establish Gen 3 backplane links.
MXI-Express Gen-3 x16 User Manual | © National Instruments | 5
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