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46 Intel
®
31154 133 MHz PCI Bridge Design Guide Design Guide
PCI-X Layout Guidelines
7.2.1.1 Intel
®
31154 133 MHz PCI Bridge Embedded Application at 133 MHz
Figure 10 shows the 31154 application in a stand-alone embedded application. In this application
the 31154 is shown driving a single PCI device. Table 15 shows the corresponding wiring lengths
to use as a reference.
Figure 10. Embedded Intel
®
31154 133 MHz PCI Bridge Design 133 MHz PCI-X Layout
Table 15. Wiring Lengths for Embedded 133 MHz Design
Segment
Lower AD Bus Upper AD Bus
Units
Minimum
Length
Maximum
Length
Minimum
Length
Maximum
Length
W1 5.5 10.5 4.5 9.5 inches
W2 0.75 1.5 1.75 2.75 inches
W3 0.1 0.1 – – inches
W4 1.725 1.725 – – inches
B3058-01
W1
PCI
Agent
I/O Buffer
W3
IDSEL
W4
W2