Intel Pentium 4 User Manual

Introduction
R
Intel
®
Pentium
®
4 Processor / Intel
®
850 Chipset Family Platform Design Guide 3
Contents
1
Introduction........................................................................................................................ 17
1.1 Related Documentation ........................................................................................ 18
1.2 Conventions and Terminology.............................................................................. 19
1.3 System Overview.................................................................................................. 21
1.3.1 Intel
®
Pentium
®
4 Processor in the 478-pin Package ........................... 21
1.3.2 Intel
®
850 Chipset ................................................................................. 21
1.3.2.1 Intel
®
82850/82850E Memory Controller Hub (MCH) .......... 22
1.3.2.2 Intel
®
ICH2 ........................................................................... 22
1.3.3 System Configurations .......................................................................... 23
1.4 Platform Initiatives ................................................................................................ 24
1.4.1 Intel
®
850 Chipset ................................................................................. 24
1.4.1.1 Rambus Direct RDRAM* Device Interface .......................... 24
1.4.1.2 Accelerated Graphics Port (AGP)........................................ 24
1.4.2 Intel
®
ICH2 ............................................................................................ 24
1.4.2.1 Integrated LAN Controller .................................................... 24
1.4.2.2 Intel
®
AC’97 6-Channel Support .......................................... 25
1.4.2.3 Low Pin Count (LPC) Interface ............................................ 26
1.4.2.4 Ultra ATA ............................................................................. 26
1.4.2.5 Universal Serial Bus (USB).................................................. 26
1.4.3 Platform Manageability.......................................................................... 27
1.5 PC ’99/’01 Platform Compliance........................................................................... 28
2 Component Quadrant Layout ............................................................................................ 29
2.1 Processor Component Quadrant Layout.............................................................. 29
2.2 Intel
®
850/850E Chipset Component Quadrant Layout ........................................ 30
3 Platform Placement and Stack-Up Overview .................................................................... 31
3.1 Platform Component Placement .......................................................................... 31
3.1.1 Six-Layer Motherboard.......................................................................... 31
3.1.2 Four-Layer Motherboard ....................................................................... 32
3.1.2.1 Four-Layer Motherboard Routing Strategy .......................... 34
3.2 Motherboard Layer Stack-Up ............................................................................... 36
3.2.1 Six-Layer Motherboard Stack-Up.......................................................... 36
3.2.2 Design Considerations .......................................................................... 37
3.2.3 Four-Layer Motherboard Stack-Up ....................................................... 38
4 Platform Clock Routing Guidelines ................................................................................... 39
4.1 Routing Guidelines for System Bus Clocks .......................................................... 41
4.2 BCLK[1:0] Frequency Select ................................................................................ 46
4.2.1 100 MHz Operation – Intel
®
82850 Chipset .......................................... 46
4.2.2 133 MHz Operation – Intel
®
82850E Chipset........................................ 47
4.3 Routing Guidelines for Rambus RDRAM* Device Clocks .................................... 48
4.3.1 CK00 to Rambus DRCG* (Reference Clocks)...................................... 48
4.3.2 Intel
®
MCH to Rambus DRCG* (Phase Aligning Clocks)...................... 49

Intel Pentium 4 Specifications

General

Brand	Intel
Model	Pentium 4
Category	Computer Hardware
Language	English