March
Design Guide
Intel 440GX AGPset
Intel440GX AGPset Design Guide
Contents
Validation
82371EB PIIX4E
4.3.1 IntelPentiumII Processor LAI Issue
Figures
Tables
Date
Revision History
Intel440GX AGPset Design Guide
Revision
Intel440GX AGPset Design Guide
Introduction
Page
Introduction
Introduction
1.1 About This Design Guide
Introduction
1.2 References
Intel 440GX AGPset Datasheet WWW order number
AP-589 EMI WWW order number
Introduction
1.3 Intel Pentium II Processor / Intel 440GX AGPset Overview
1.3.1 Intel Pentium II Processor
1.3.2 Intel 440GX AGPset
Introduction
1.3.2.3 Accelerated Graphics Port Interface
1.3.2.1 System Bus Interface
1.3.2.2 DRAM Interface
Introduction
1.3.2.4 PCI Interface
1.3.4 Wired for Management Initiative
1.3.3 PCI-to-ISA/IDE Xcelerator PIIX4E
1.3.2.5 System Clocking
Introduction
1.3.3.2 Remote Service Boot
1.3.3.1 Instrumentation
1.4.1 Voltage Definitions
1.3.3.4 Power Management
1.4 Design Recommendations
1.3.3.3 Remote Wake-Up
AGPset Design
1.4.2 General Design Recommendations
1.4.3 Transitioning from Intel 440BX AGPset to Intel 440GX
Introduction
Introduction
Intel440GX AGPset Design Guide
Motherboard Design
Page
Guidelines
Figure 2-1. Major Signal Sections 82443GX Top View
Motherboard Layout and Routing
2.1 BGA Quadrant Assignment
Motherboard Layout and Routing Guidelines
ATX Form Factor
NLX Form Factor
2.2 Board Description
Motherboard Layout and Routing Guidelines
Figure 2-4. Four Layer Board Stack-up
Motherboard Layout and Routing Guidelines
2.3 Routing Guidelines
Motherboard Layout and Routing Guidelines
2.3.3 Single Processor Design
2.3.1 GTL+ Description
2.3.2 GTL+ Layout Recommendations
2.3.3.1 Single Processor Network Topology and Conditions
Motherboard Layout and Routing Guidelines
2.3.3.2 Single Processor Recommended Trace Lengths
Table 2-1. Recommended Trace Lengths for Single Processor Design
2.3.4.1 Dual Processor Network Topology and Conditions
2.3.4 Dual Processor Systems
2.3.5 Single Processor Systems-Single-End Termination SET
2.3.4.2 Dual Processor Recommended Trace Lengths
Motherboard Layout and Routing Guidelines
2.3.5.2 SET Trace Length Requirements
Table 2-3. SET Trace Length Requirements
2.3.6.2 Practical Considerations
2.3.6 Additional Guidelines
2.3.6.1 Minimizing Crosstalk
Motherboard Layout and Routing Guidelines
2.3.7 Design Methodology
Motherboard Layout and Routing Guidelines
Motherboard Layout and Routing Guidelines
2.3.8 Performance Requirements
Figure 2-12. GTL+ Design Process
2.3.11 Simulation Methodology
2.3.9 Topology Definition
2.3.10 Pre-Layout Simulation Sensitivity Analysis
Table 2-4. Recommended 100 MHz System Flight Time Specs
Figure 2-13. Pre-layout simulation process
2.4 Placement & Layout
2.5 Post-Layout Simulation
Motherboard Layout and Routing Guidelines
2.6.1 Flight Time Measurement
2.5.1 Crosstalk and the Multi-Bit Adjustment Factor
2.6 Validation
Motherboard Layout and Routing Guidelines
Edge
2.6.2 Signal Quality Measurement
Motherboard Layout and Routing Guidelines
Guideline @ Processor Edge
The terms used in the equations are described in Table
2.7 Timing Analysis
Motherboard Layout and Routing Guidelines
Motherboard Layout and Routing Guidelines
Table 2-10. Recommended 100 MHz System Timing Parameters
Table 2-11. Recommended 100 MHz System Flight Time Specs
Tflight,min
2.8 AGP Layout and Routing Guidelines
2.8.1 AGP Connector “Up Option Layout Guidelines
Figure 2-14. AGP Connector Layout Guidelines
Table 2-12. Data and Associated Strobe
Table 2-13. Source Synchronous Motherboard Recommendations
Table 2-14. Control Signal Line Length Recommendations
2.8.2 On-board AGP Compliant Device “Down” Option Layout Guidelines
Motherboard Layout and Routing Guidelines
Table 2-15. Source Synchronous Motherboard Recommendations
Table 2-16. Control Signal Line Length Recommendations
Figure 2-15. On-board AGP Compliant Device Layout Guidelines
Motherboard Layout and Routing Guidelines
2.9.1 100 MHz 82443GX Memory Array Considerations
Figure 2-16. FET Switch Example
2.9 82443GX Memory Subsystem Layout and Routing Guidelines
Motherboard Layout and Routing Guidelines
Figure 2-17. Registered SDRAM DIMM Example
2.9.1.1 Matching the Reference Planes
2.9.1.2 Adding Additional Decoupling Capacitor
Table 2-17. MDx lines Reference Planes Routing
Figure 2-19. 4 DIMMs Single or Double-Sided
2.9.2 Memory Layout & Routing Guidelines
2.9.1.3 Trace Width vs. Trace Spacing
Motherboard Layout and Routing Guidelines
82443GX
Table 2-18. FET Switch DQ Route Example
Figure 2-20. Motherboard Model-Data MDxx, 4 DIMMs
Motherboard Layout and Routing Guidelines
Figure 2-23. Motherboard Model-DQMA1,5, 4 DIMMs
Figure 2-21. Motherboard Model-DQMA0,24,67, 4 DIMMs
Figure 2-22. Motherboard Model-DQMA1,5, 4 DIMMs
Motherboard Layout and Routing Guidelines
Figure 2-26. Motherboard Model-SRASA#, 4 DIMMs
Figure 2-24. Motherboard Model-DQMB1,5, 4 DIMMs
Figure 2-25. Motherboard Model-CSA#/CSB#, 4 DIMMs
Motherboard Layout and Routing Guidelines
Table 2-21. Motherboard Model SCASB#, 4 DIMMs
Table 2-19. Motherboard Model SRASB#, 4 DIMMs
Table 2-20. Motherboard Model SCASA#, 4 DIMMs
Motherboard Layout and Routing Guidelines
Table 2-24. Motherboard Model MAA140, 4 DIMMs
Table 2-22. Motherboard Model WEA#, 4 DIMMs
Table 2-23. Motherboard Model WEB#, 4 DIMMs
Motherboard Layout and Routing Guidelines
Table 2-25. Motherboard Model MAB12,11,90#, MAB14,13,10, 4 DIMMs
2.9.3 4 DIMM Routing Guidelines NO FET
2.9.4 PCI Bus Routing Guidelines
Figure 2-27. Motherboard Model-Data MDxx Lines, 4 DIMMs No FET
Figure 2-28. PCI Bus Layout Example
2.9.5 Decoupling Guidelines Intel 440GX AGPset Platform
Host Bridge Controller 492 BGA
Figure 2-29. 82443GX Decoupling
2.9.6.2 System Bus Clock Layout
2.9.6 Intel 440GX AGPset Clock Layout Recommendations
2.9.6.1 Clock Routing Spacing
Figure 2-30. Clock Trace Spacing Guidelines
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
3.1 Overview
Design Checklist
Design Checklist
3.2 Pull-up and Pull-down Resistor Values
Figure 3-1. Pull-up Resistor Example
3.3 Intel Pentium II Processor Checklist
3.3.1 Intel Pentium II Processor
Table 3-1. Slot Connectivity Sheet 1 of
Intel440GX AGPset Design Guide
Table 3-1. Slot Connectivity Sheet 2 of
Design Checklist
Design Checklist
Table 3-2. GND & Power Pin Definition
Table 3-1. Slot Connectivity Sheet 3 of
Intel440GX AGPset Design Guide
Design Checklist
3.3.3 Intel Pentium II Processor Signals
3.3.2 Intel Pentium II Processor Clocks
Design Checklist
DBRESET ITP Reset signal requires a 240 ohm pull-up to VCC3
3.3.6 Slot 1 Decoupling Capacitors
3.3.4 Uni-Processor UP Slot 1 Checklist
3.3.5 Dual-Processor DP Slot 1 Checklist
3.3.7 Voltage Regulator Module, VRM
Table 3-3. Processor Frequency Select
3.4 Intel 440GX AGPset Clocks
3.4.1 CK100 - 100 MHz Clock Synthesizer
Design Checklist
Figure 3-2. GCKE & DCLKWR Connections
3.4.2 CKBF - SDRAM 1 to 18 Clock Buffer
3.4.3 GCKE and DCLKWR Connection
Design Checklist
Table 3-4. 82443GX Connectivity Sheet 1 of
3.5 82443GX Host Bridge
3.5.1 82443GX Interface
Design Checklist
Intel440GX AGPset Design Guide
Table 3-4. 82443GX Connectivity Sheet 2 of
Design Checklist
3-11
Table 3-4. 82443GX Connectivity Sheet 3 of
3.5.2 82443GX GTL+ Bus Interface
3.5.3 82443GX PCI Interface
Design Checklist
Design Checklist
3.5.4 82443GX AGP Interface
Table 3-5. Strapping Options
Table 3-6. SDRAM Connectivity
3.6 Intel 440GX AGPset Memory Interface
3.6.1 SDRAM Connections
Design Checklist
3.6.3 Registered SDRAM
3.6.2 DIMM Solution With FET Switches
Figure 3-3. Current Solution With Existing FET Switches
Design Checklist
Table 3-7. PIIX4E Connectivity Sheet 1 of
3.7 82371EB PIIX4E
3.7.1 PIIX4E Connections
Design Checklist
Intel440GX AGPset Design Guide
Table 3-7. PIIX4E Connectivity Sheet 2 of
Design Checklist
3-17
Intel440GX AGPset Design Guide
Table 3-7. PIIX4E Connectivity Sheet 3 of
Design Checklist
3-18
Intel440GX AGPset Design Guide
Table 3-7. PIIX4E Connectivity Sheet 4 of
Design Checklist
3-19
3.7.2.2 Motherboard
3.7.2 IDE Routing Guidelines
3.7.2.1 Cabling
Table 3-8. IDE Series Termination
Design Checklist
Figure 3-4. Series Resistor Placement for Primary IDE Connectors
PIIX4E
Table 3-9. PIIX4E PWR & GND
3.8 PCI Bus Signals
3.7.3 PIIX4E Power And Ground Pins
Design Checklist
Table 3-10. Non-PIIX4E PCI Signals
ISA Signals
3.10 ISA and X-Bus Signals
Table 3-11. Non-PIIX4E ISA Signals
Table 3-12. Non-PIIX4E IDE
3.11 USB Interface
3.12 IDE Interface
Design Checklist
3.13.2 Flash Design Considerations
3.13 Flash Design
3.13.1 Dual-Footprint Flash Design
Figure 3-5. Dual Footprint Flash Layouts
Flash
XD70
1Mbit/2Mbit
Figure 3-6. nterfacing Intel’s Flash with PIIX4E in Desktop
Write Protection
Table 3-13. Flash Vpp Recommendations
Design Checklist
Figure 3-7. Interfacing Intel’s Flash with PIIX4E in Desktop
3.14 System and Test Signals
3.15 Power Management Signals
Design Checklist
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
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
Note The polarities have been altered to simplify drawing
3.15.1 Power Button Implementation
Design Checklist
3.16 Miscellaneous
Design Checklist
3.17 82093AA IOAPIC
Design Checklist
3.18.2 LM79 Microprocessor System Hardware Monitor
3.18.1 Max1617 Temperature Sensor
3.18 Manageability Devices
Design Checklist
3.18.3 82558B LOM Checklist
Design Checklist
3.18.4 Wake On LAN WOL Header
3.19 Software/BIOS
3.19.1 USB and Multi-processor BIOS
Design Checklist
3.19.2 Design Considerations
3.20 Thermals / Cooling Solutions
3.21 Mechanicals
3.20.1 Design Considerations
3.22.1 Design Considerations
3.22 Electricals
3.21.1 Design Considerations
Design Checklist
3.23.1 Routing and Board Fabrication
3.23 Layout Checklist
3.24 Applications and Add-in Hardware
3.23.2 Design Consideration
Debug Recommendations
Page
4.2 Debug/Simulation Tools
Debug Recommendations
4.1 Slot 1 Test Tools
4.2.1 Logic Analyzer Interface LAI
4.2.3 Bus Functional Model BFM
4.3 Debug Features
4.3.1 Intel Pentium II Processor LAI Issue
4.2.4 I/O Buffer Models
Figure 4-1. LAI Probe Input Circuit
Debug Recommendations
4.3.2 Debug Logic Recommendations
Debug Recommendations
4.3.2.1 Debug Considerations
4.3.4 Debug Procedures
4.3.3 Debug Layout
4.3.3.1 Design Considerations
Debug Recommendations
DM = 0, D3-D0 = 1111 all including self shorthand
Third Party Vendors
Page
Processors
Table 5-1. Slot 1 Connector
Third-Party Vendor Information
Third-Party Vendor Information
Table 5-4. Voltage Regulator Modules
5.1.1 Voltage Regulator Modules
5.1.2 Voltage Regulator Control Silicon
Table 5-5. Voltage Regulator Control Silicon Vendors
Table 5-7. Power Management Component Vendors
5.2.2 Power Management Components
5.2.3 FET Switches4 DIMM/FET Design
Table 5-8. FET Switch Vendors
5.3.2 Mechanical Support
5.3.1 Slot 1 Connector
5.3 Other Processor Components
5.3.3 Heat sinks
Reference Design Schematics
Page
Intel440GX AGPset Platform Reference Design
Intel 440GX AGPset Platform Reference
Design
4 and
Intel440GX AGPset Platform Reference Design
The GCKE shift register circuit is also shown
Intel440GX AGPset Platform Reference Design
Ultra I/O Component
Pull-up and Pull-down Resistors
Power Connectors Front Panel Jumpers
Intel440GX AGPset Platform Reference Design
34-35
![Figure 2-21. Motherboard Model—DQMA[0,2:4,6:7], 4 DIMMs](/images/new-backgrounds/108076/10807699x1.webp)
