PCI-X Layout Guidelines

Figure 17. PCI-X Clock PICMG 1.2 Style Backplane

Intel® 31154 133 MHz

Slot1

SlotN

PCI Bridge Clock Buffer

 

Device

 

 

S1

39 Ohms

Card Stub S2

Edge Connector

WN

BN

Backplane

B3332-01

Table 21. PCI-X Clock Wiring Lengths for PICMG Backplane

 

Clock Point to Point

 

Segment

 

 

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

 

 

 

 

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Intel® 31154 133 MHz PCI Bridge Design Guide Design Guide

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Intel 31154 manual PCI-X Clock Wiring Lengths for Picmg Backplane, Clock Point to Point