Intel 41210 Embedded PCI-X 133 MHz Topology, Embedded PCI-X 133 MHz Routing Recommendations

Models: 41210

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8.6.1Embedded PCI-X 133 MHz

PCI-X Layout Guidelines

8.6.1Embedded PCI-X 133 MHz

This section lists the routing recommendations for PCI-X 133 MHz without a slot. Figure 18 shows the block diagram of this topology and Table 10 describes the routing recommendations.

Figure 18. Embedded PCI-X 133 MHz Topology

 

 

EM1

 

 

TL EM1

 

 

 

TL1

 

 

 

TL EM2

 

 

 

EM2

 

 

 

B2719 -01

 

 

 

 

Table 10.

Embedded PCI-X 133 MHz Routing Recommendations

 

 

 

 

 

Parameter

Routing Guideline for Lower AD Bus

 

 

 

 

 

Reference Plane

Route over an unbroken ground plane

 

 

 

 

 

Board Impedance

60 +/- 15%

 

 

 

 

 

Stripline Trace Spacing

12 mils from edge to edge

 

 

 

 

 

Microstrip Trace Spacing

18 mils, from edge to edge

 

 

 

 

 

Break Out

5 mils on 5 mils spacing. Maximum length of breakout region can be 500 mils

 

 

 

 

 

Group Spacing

Spacing from other groups: 25 mils min, edge to edge

 

 

 

 

 

Trace Length 1 (TL1): From

 

 

 

41210 Bridge signal Ball to

1.75” min - 4.0” max

 

first junction

 

 

 

 

 

 

 

Trace Length 3 junction of

 

 

 

TL_EM1 and TL_EM2 to the

1.25” min - 3.25” max

 

embedded device

 

 

 

Length Matching

Clocks coming form the clock driver must be on the same layer and length

 

Requirements:

matched to within 25 mils.

 

 

 

 

 

Number of vias

3 vias max per path

 

 

 

 

Intel® 41210 Serial to Parallel PCI Bridge Design Guide

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Intel 41210 Embedded PCI-X 133 MHz Topology, Embedded PCI-X 133 MHz Routing Recommendations, PCI-X Layout Guidelines