March
Design Guide
Intel 440GX AGPset
Intel440GX AGPset Design Guide
Contents
Validation
82371EB PIIX4E
4.3.1 IntelPentiumII Processor LAI Issue
Figures
Tables
Revision
Revision History
Intel440GX AGPset Design Guide
Date
Intel440GX AGPset Design Guide
Introduction
Page
Introduction
Introduction
1.1 About This Design Guide
AP-589 EMI WWW order number
1.2 References
Intel 440GX AGPset Datasheet WWW order number
Introduction
Introduction
1.3 Intel Pentium II Processor / Intel 440GX AGPset Overview
1.3.1 Intel Pentium II Processor
Introduction
1.3.2 Intel 440GX AGPset
Introduction
1.3.2.1 System Bus Interface
1.3.2.2 DRAM Interface
1.3.2.3 Accelerated Graphics Port Interface
1.3.2.5 System Clocking
1.3.4 Wired for Management Initiative
1.3.3 PCI-to-ISA/IDE Xcelerator PIIX4E
1.3.2.4 PCI Interface
Introduction
1.3.3.2 Remote Service Boot
1.3.3.1 Instrumentation
1.3.3.3 Remote Wake-Up
1.3.3.4 Power Management
1.4 Design Recommendations
1.4.1 Voltage Definitions
Introduction
1.4.2 General Design Recommendations
1.4.3 Transitioning from Intel 440BX AGPset to Intel 440GX
AGPset Design
Intel440GX AGPset Design Guide
Introduction
Motherboard Design
Page
2.1 BGA Quadrant Assignment
Figure 2-1. Major Signal Sections 82443GX Top View
Motherboard Layout and Routing
Guidelines
ATX Form Factor
Motherboard Layout and Routing Guidelines
NLX Form Factor
2.2 Board Description
Motherboard Layout and Routing Guidelines
Motherboard Layout and Routing Guidelines
Figure 2-4. Four Layer Board Stack-up
Motherboard Layout and Routing Guidelines
2.3 Routing Guidelines
2.3.3.1 Single Processor Network Topology and Conditions
2.3.1 GTL+ Description
2.3.2 GTL+ Layout Recommendations
2.3.3 Single Processor Design
Motherboard Layout and Routing Guidelines
2.3.3.2 Single Processor Recommended Trace Lengths
Table 2-1. Recommended Trace Lengths for Single Processor Design
2.3.4.2 Dual Processor Recommended Trace Lengths
2.3.4 Dual Processor Systems
2.3.5 Single Processor Systems-Single-End Termination SET
2.3.4.1 Dual Processor Network Topology and Conditions
Motherboard Layout and Routing Guidelines
2.3.5.2 SET Trace Length Requirements
Table 2-3. SET Trace Length Requirements
Motherboard Layout and Routing Guidelines
2.3.6 Additional Guidelines
2.3.6.1 Minimizing Crosstalk
2.3.6.2 Practical Considerations
Motherboard Layout and Routing Guidelines
2.3.7 Design Methodology
Motherboard Layout and Routing Guidelines
2.3.8 Performance Requirements
Figure 2-12. GTL+ Design Process
Table 2-4. Recommended 100 MHz System Flight Time Specs
2.3.9 Topology Definition
2.3.10 Pre-Layout Simulation Sensitivity Analysis
2.3.11 Simulation Methodology
Motherboard Layout and Routing Guidelines
2.4 Placement & Layout
2.5 Post-Layout Simulation
Figure 2-13. Pre-layout simulation process
Motherboard Layout and Routing Guidelines
2.5.1 Crosstalk and the Multi-Bit Adjustment Factor
2.6 Validation
2.6.1 Flight Time Measurement
Guideline @ Processor Edge
2.6.2 Signal Quality Measurement
Motherboard Layout and Routing Guidelines
Edge
The terms used in the equations are described in Table
2.7 Timing Analysis
Motherboard Layout and Routing Guidelines
Tflight,min
Table 2-10. Recommended 100 MHz System Timing Parameters
Table 2-11. Recommended 100 MHz System Flight Time Specs
Motherboard Layout and Routing Guidelines
Table 2-12. Data and Associated Strobe
2.8.1 AGP Connector “Up Option Layout Guidelines
Figure 2-14. AGP Connector Layout Guidelines
2.8 AGP Layout and Routing Guidelines
Motherboard Layout and Routing Guidelines
Table 2-14. Control Signal Line Length Recommendations
2.8.2 On-board AGP Compliant Device “Down” Option Layout Guidelines
Table 2-13. Source Synchronous Motherboard Recommendations
Motherboard Layout and Routing Guidelines
Table 2-16. Control Signal Line Length Recommendations
Figure 2-15. On-board AGP Compliant Device Layout Guidelines
Table 2-15. Source Synchronous Motherboard Recommendations
Motherboard Layout and Routing Guidelines
Figure 2-16. FET Switch Example
2.9 82443GX Memory Subsystem Layout and Routing Guidelines
2.9.1 100 MHz 82443GX Memory Array Considerations
Table 2-17. MDx lines Reference Planes Routing
2.9.1.1 Matching the Reference Planes
2.9.1.2 Adding Additional Decoupling Capacitor
Figure 2-17. Registered SDRAM DIMM Example
Motherboard Layout and Routing Guidelines
2.9.2 Memory Layout & Routing Guidelines
2.9.1.3 Trace Width vs. Trace Spacing
Figure 2-19. 4 DIMMs Single or Double-Sided
Motherboard Layout and Routing Guidelines
Table 2-18. FET Switch DQ Route Example
Figure 2-20. Motherboard Model-Data MDxx, 4 DIMMs
82443GX
Motherboard Layout and Routing Guidelines
Figure 2-21. Motherboard Model-DQMA0,24,67, 4 DIMMs
Figure 2-22. Motherboard Model-DQMA1,5, 4 DIMMs
Figure 2-23. Motherboard Model-DQMA1,5, 4 DIMMs
Motherboard Layout and Routing Guidelines
Figure 2-24. Motherboard Model-DQMB1,5, 4 DIMMs
Figure 2-25. Motherboard Model-CSA#/CSB#, 4 DIMMs
Figure 2-26. Motherboard Model-SRASA#, 4 DIMMs
Motherboard Layout and Routing Guidelines
Table 2-19. Motherboard Model SRASB#, 4 DIMMs
Table 2-20. Motherboard Model SCASA#, 4 DIMMs
Table 2-21. Motherboard Model SCASB#, 4 DIMMs
Motherboard Layout and Routing Guidelines
Table 2-22. Motherboard Model WEA#, 4 DIMMs
Table 2-23. Motherboard Model WEB#, 4 DIMMs
Table 2-24. Motherboard Model MAA140, 4 DIMMs
Figure 2-27. Motherboard Model-Data MDxx Lines, 4 DIMMs No FET
2.9.3 4 DIMM Routing Guidelines NO FET
2.9.4 PCI Bus Routing Guidelines
Table 2-25. Motherboard Model MAB12,11,90#, MAB14,13,10, 4 DIMMs
Figure 2-29. 82443GX Decoupling
2.9.5 Decoupling Guidelines Intel 440GX AGPset Platform
Host Bridge Controller 492 BGA
Figure 2-28. PCI Bus Layout Example
Figure 2-30. Clock Trace Spacing Guidelines
2.9.6 Intel 440GX AGPset Clock Layout Recommendations
2.9.6.1 Clock Routing Spacing
2.9.6.2 System Bus Clock Layout
Motherboard Layout and Routing Guidelines
2.9.6.3 PCI Clock Layout
2.9.6.4 SDRAM Clock Layout
Motherboard Layout and Routing Guidelines
2.9.6.5 AGP Clock Layout
Figure 2-31. AGP Clock Layout
Design Checklist
Page
3.2 Pull-up and Pull-down Resistor Values
Design Checklist
Design Checklist
3.1 Overview
Table 3-1. Slot Connectivity Sheet 1 of
3.3 Intel Pentium II Processor Checklist
3.3.1 Intel Pentium II Processor
Figure 3-1. Pull-up Resistor Example
Intel440GX AGPset Design Guide
Table 3-1. Slot Connectivity Sheet 2 of
Design Checklist
Intel440GX AGPset Design Guide
Table 3-2. GND & Power Pin Definition
Table 3-1. Slot Connectivity Sheet 3 of
Design Checklist
Design Checklist
3.3.3 Intel Pentium II Processor Signals
3.3.2 Intel Pentium II Processor Clocks
DBRESET ITP Reset signal requires a 240 ohm pull-up to VCC3
Design Checklist
3.3.7 Voltage Regulator Module, VRM
3.3.4 Uni-Processor UP Slot 1 Checklist
3.3.5 Dual-Processor DP Slot 1 Checklist
3.3.6 Slot 1 Decoupling Capacitors
Design Checklist
3.4 Intel 440GX AGPset Clocks
3.4.1 CK100 - 100 MHz Clock Synthesizer
Table 3-3. Processor Frequency Select
Design Checklist
3.4.2 CKBF - SDRAM 1 to 18 Clock Buffer
3.4.3 GCKE and DCLKWR Connection
Figure 3-2. GCKE & DCLKWR Connections
Design Checklist
3.5 82443GX Host Bridge
3.5.1 82443GX Interface
Table 3-4. 82443GX Connectivity Sheet 1 of
3-11
Table 3-4. 82443GX Connectivity Sheet 2 of
Design Checklist
Intel440GX AGPset Design Guide
Design Checklist
3.5.2 82443GX GTL+ Bus Interface
3.5.3 82443GX PCI Interface
Table 3-4. 82443GX Connectivity Sheet 3 of
Design Checklist
3.5.4 82443GX AGP Interface
Table 3-5. Strapping Options
Design Checklist
3.6 Intel 440GX AGPset Memory Interface
3.6.1 SDRAM Connections
Table 3-6. SDRAM Connectivity
Design Checklist
3.6.2 DIMM Solution With FET Switches
Figure 3-3. Current Solution With Existing FET Switches
3.6.3 Registered SDRAM
Design Checklist
3.7 82371EB PIIX4E
3.7.1 PIIX4E Connections
Table 3-7. PIIX4E Connectivity Sheet 1 of
3-17
Table 3-7. PIIX4E Connectivity Sheet 2 of
Design Checklist
Intel440GX AGPset Design Guide
3-18
Table 3-7. PIIX4E Connectivity Sheet 3 of
Design Checklist
Intel440GX AGPset Design Guide
3-19
Table 3-7. PIIX4E Connectivity Sheet 4 of
Design Checklist
Intel440GX AGPset Design Guide
Table 3-8. IDE Series Termination
3.7.2 IDE Routing Guidelines
3.7.2.1 Cabling
3.7.2.2 Motherboard
Design Checklist
Figure 3-4. Series Resistor Placement for Primary IDE Connectors
PIIX4E
Design Checklist
3.8 PCI Bus Signals
3.7.3 PIIX4E Power And Ground Pins
Table 3-9. PIIX4E PWR & GND
Table 3-11. Non-PIIX4E ISA Signals
ISA Signals
3.10 ISA and X-Bus Signals
Table 3-10. Non-PIIX4E PCI Signals
Design Checklist
3.11 USB Interface
3.12 IDE Interface
Table 3-12. Non-PIIX4E IDE
Figure 3-5. Dual Footprint Flash Layouts
3.13 Flash Design
3.13.1 Dual-Footprint Flash Design
3.13.2 Flash Design Considerations
Figure 3-6. nterfacing Intel’s Flash with PIIX4E in Desktop
XD70
1Mbit/2Mbit
Flash
Write Protection
Table 3-13. Flash Vpp Recommendations
Design Checklist
Design Checklist
3.14 System and Test Signals
3.15 Power Management Signals
Figure 3-7. Interfacing Intel’s Flash with PIIX4E in Desktop
Note The polarities have been altered to simplify drawing
Simplified P W R G O O D a n d P W R O K generation logic VCC3
A S L O T O C C B S L O T O C C4.7K V R M 1 P W R G D
V R M 2 P W R G D I T P R E S E T A T X P S P O K
Design Checklist
3.15.1 Power Button Implementation
Design Checklist
3.16 Miscellaneous
Design Checklist
3.17 82093AA IOAPIC
Design Checklist
3.18 Manageability Devices
3.18.1 Max1617 Temperature Sensor
3.18.2 LM79 Microprocessor System Hardware Monitor
Design Checklist
3.18.3 82558B LOM Checklist
Design Checklist
3.19 Software/BIOS
3.19.1 USB and Multi-processor BIOS
3.18.4 Wake On LAN WOL Header
3.20.1 Design Considerations
3.20 Thermals / Cooling Solutions
3.21 Mechanicals
3.19.2 Design Considerations
Design Checklist
3.22 Electricals
3.21.1 Design Considerations
3.22.1 Design Considerations
3.23.2 Design Consideration
3.23 Layout Checklist
3.24 Applications and Add-in Hardware
3.23.1 Routing and Board Fabrication
Debug Recommendations
Page
4.2.1 Logic Analyzer Interface LAI
Debug Recommendations
4.1 Slot 1 Test Tools
4.2 Debug/Simulation Tools
4.2.4 I/O Buffer Models
4.3 Debug Features
4.3.1 Intel Pentium II Processor LAI Issue
4.2.3 Bus Functional Model BFM
Debug Recommendations
Figure 4-1. LAI Probe Input Circuit
Debug Recommendations
4.3.2 Debug Logic Recommendations
4.3.3.1 Design Considerations
4.3.4 Debug Procedures
4.3.3 Debug Layout
4.3.2.1 Debug Considerations
DM = 0, D3-D0 = 1111 all including self shorthand
Debug Recommendations
Third Party Vendors
Page
Third-Party Vendor Information
Table 5-1. Slot 1 Connector
Third-Party Vendor Information
Processors
Table 5-5. Voltage Regulator Control Silicon Vendors
5.1.1 Voltage Regulator Modules
5.1.2 Voltage Regulator Control Silicon
Table 5-4. Voltage Regulator Modules
Table 5-8. FET Switch Vendors
5.2.2 Power Management Components
5.2.3 FET Switches4 DIMM/FET Design
Table 5-7. Power Management Component Vendors
5.3.3 Heat sinks
5.3.1 Slot 1 Connector
5.3 Other Processor Components
5.3.2 Mechanical Support
Reference Design Schematics
Page
4 and
Intel 440GX AGPset Platform Reference
Design
Intel440GX AGPset Platform Reference Design
The GCKE shift register circuit is also shown
Intel440GX AGPset Platform Reference Design
Ultra I/O Component
Intel440GX AGPset Platform Reference Design
34-35
Power Connectors Front Panel Jumpers
Intel440GX AGPset Platform Reference Design
Pull-up and Pull-down Resistors
