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Intel
®
31154 133 MHz PCI Bridge Design Guide Design Guide 55
PCI-X Layout Guidelines
§ §
Figure 17. PCI-X Clock PICMG 1.2 Style Backplane
Table 21. PCI-X Clock Wiring Lengths for PICMG Backplane
Segment
Clock Point to Point
Units
Minimum Length Maximum Length
S1 0 0.3 inches
S2 0.75 2.75 inches
WN 0.75 2.75 inches
BN 6.5 16.2 inches
B3332-01
Intel
®
31154 133 MHz
PCI Bridge Clock Buffer
Device
Card Stub
39 Ohms
Edge Connector
Backplane
Slot1 SlotN
BN
WN
S2
S1