Mobile Intel Pentium 4 Processor - M and Intel 845MP/MZ Chipset Platform Design Guide

Mobile Intel

Pentium

4 Processor-M and Intel

845MP/845MZ Chipset Platform

Design Guide 155

Figure 86. Topology for CLK14

Clock

Driver

ICH3 and

SIO

Table 54. CLK14 Routing Guidelines

Parameter Routing Guidelines

Clock Group CLK14

Topology Point to point

Reference Plane Ground Referenced (Contiguous over entire Length)

Characteristic Trace Impedance (Zo) 60 Ohms ± 15%

Trace Width 5 mils

Trace Spacing 10 mils

Spacing to other traces 10 mils

Trace Length – A 0.00” to 0.50”

Trace Length – B 4.00” to 8.50”

Resistor R1 = 33 Ohms ±1%

Skew Requirements Should have minimal skew (~ 0) between each other, however each of the

clocks in this group is asynchronous to clocks of any other group.