Design Guide
9
Figures
Intel® Xeon™ Processor with 512 KB L2 Cache Quadrant Layout (Top View) .. 26
E7500 MCH Quadrant Layout (Top View)................................................. 27
ICH3-S Quadrant Layout (Top View) ........................................................ 28
P64H2 Quadrant Layout (Top View) ......................................................... 29
Intel® E7500 Chipset Customer Reference Board System Placement Example 32
Board with 5 mil Traces ................................................................ 33
Intel® E7500 Chipset-Based System Clocking Diagram.....................................37
Clock Skew As Measured from Agent to Agent ..................................................40
Example of Adding Two Connectors and/or a Riser ........................................... 44
Topology for CLK33 to PCI Device Down ........................................................... 46
Decoupling Capacitors Placement and Connectivity .......................................... 50
Trace Length Matching for the Dual Processor System Bus...............................57
Topology for Asynchronous GTL+ Signals Driven by the Processor ..................60
Recommended THERMTRIP# Circuit................................................................. 61
Topology for Asynchronous GTL+ Signals Driven by the Chipset ...................... 61
Topology for PWRGOOD (CPUPWRGOOD)...................................................... 62
Trace Width and Spacing for All DDR Signals Except CMDCLK/CMDCLK#...... 69
Trace Length Matching Requirements for Source Synchronous Routing ...........72
DQS To CMDCLK Pair Length Matching ............................................................ 72
Trace Width/Spacing for CMDCLK/CMDCLK# Routing ...................................... 74
Length Matching Requirements for Source Clocked Signal, CKE, and CS[7:0]#74
Receive Enable Signal Routing Guidelines......................................................... 78
DDRCOMP Resistive Compensation .................................................................. 79
DDRCVOL and DDRCVOH Resistive Compensation ......................................... 79
Содержание Xeon
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