Intel 815 - User Manual

System Bus Routing Guidelines43
- Initial Timing Analysis43
Calculations44
Table 6. Intel Pentium44
General Topology and Layout Guidelines46
- Figure 19. Topology for 370-Pin Socket Designs with Single-Ended Termination (SET)46
- Table 10. Trace Width:space Guidelines46
- Table 9. Trace Guidelines for Figure 1946
- Motherboard Layout Rules for AGTL/AGTL+ Signals47
Electrical Differences for Universal PGA370 Designs51
- THERMTRIP Circuit51
  - THERMTRIP Timing51
  - Figure 22. Example Implementation of THERMTRIP Circuit51
PGA370 Socket Definition Details52
Table 12. Processor Pin Definition Comparison52
BSEL[1:0] Implementation Differences56
Figure 23. BSEL[1:0] Circuit Implementation for PGA370 Designs56
CLKREF Circuit Implementation57
Undershoot/Overshoot Requirements57
Figure 24. Examples for CLKREF Divider Circuit57
Table 13. Resistor Values for CLKREF Divider (3.3V Source)57
Processor Reset Requirements58
Figure 25. RESET#/RESET2# Routing Guidelines58
Table 14. RESET#/RESET2# Routing Guidelines (See Figure 25)58
Processor PLL Filter Recommendations59
- Topology59
- Filter Specification59
- Figure 26. Filter Specification60
- Recommendation for Intel Platforms61
- Table 15. Component Recommendations - Inductor61
- Table 16. Component Recommendations - Capacitor61
- Table 17. Component Recommendation - Resistor61
- Figure 27. Example PLL Filter Using a Discrete Resistor62
- Figure 28. Example PLL Filter Using a Buried Resistor62
- Custom Solutions63
Voltage Regulation Guidelines63
Decoupling Guidelines for Universal PGA370 Designs63
- VCC CORE Decoupling Design63
- Figure 29. Core Reference Model63
- VTT Decoupling Design64
- VREF Decoupling Design64
- Figure 30. Capacitor Placement on the Motherboard64
Thermal Considerations65
- Heatsink Volumetric Keepout Regions65
- Figure 31. Heatsink Volumetric Keepout Regions66
- Figure 32. Motherboard Component Keepout Regions66
Debug Port Changes67
Figure 33. TAP Connector Comparison67

6 System Memory Design Guidelines69

7 Agp/Display Cache Design Guidelines79

8 Integrated Graphics Display Output101

9 Hub Interface107

Figure 53. Hub Interface Signal Routing Example107

10 I/O Subsystem111

11 Clocking131

12 Power Delivery141

Table 32. Power Delivery Terminology141

13 System Design Checklist155

14 Third-Party Vendor Information171

Appendix A: Customer Reference Board (CRB)173

Brand	Intel
Model	815
Category	Computer Hardware
Language	English

Intel 815 - User Manual

Table of Contents

Intel 815 Specifications

Related product manuals