Design Guide
3
Contents
................................................................................................................ 15
System Overview ................................................................................................ 19
1.3.1
Intel® Xeon™ Processor with 512 KB L2 Cache ...............................20
Intel® E7500 Chipset ......................................................................... 21
Intel® E7500 Memory Controller Hub (MCH) ....................... 21
ICH3-S).....................................22
®
82870P2 P64H2) ................. 22
Bandwidth Summary .......................................................................... 23
System Configurations ....................................................................... 23
.............................................................................. 25
Intel® Xeon™ Processor with 512 KB L2 Cache Quadrant Layout .................... 26
ICH3-S Quadrant Layout ........................................................................... 28
82870P2 P64H2 Quadrant Layout ............................................................ 29
Platform Stack-Up and Component Placement Overview
....................... 31
Platform Clock Routing Guidelines
.................................................................. 35
HOST_CLK Clock Group ................................................................... 38
HOST_CLK Clock Topology ................................................. 38
HOST_CLK General Routing Guidelines.............................. 41
CK408 vs. CK408B Requirement ......................................... 41
CLK66 Clock Group ........................................................................... 42
CLK66 Skew Requirements..................................................43
CLK33_ICH3-S Clock......................................................................... 45
CLK33 Clock Group ........................................................................... 46
CLK14 Clock Group ........................................................................... 48
USBCLK Clock Group ........................................................................ 49
........................................................................ 53
Routing Guidelines for the AGTL+ Source Synchronous 2X and 4X Groups .....56
5.1.1
Trace Length Matching....................................................................... 56
Wired-OR Signals............................................................................... 58
RESET# Topology.............................................................................. 59
Routing Guidelines for Asynchronous GTL+ and Miscellaneous Signals ...........59
5.3.1
Asynchronous GTL+ Signals Driven by the Processor ...................... 60
Proper THERMTRIP# Usage................................................ 61
Содержание Xeon
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