Intel® 820E Chipset
R
10 Design Guide
Figure 100. 4.5 mil Stack-Up..................................................................................................181
Figure 101. Intel® 820E Chipset Power Delivery Example......................................................184
Figure 102. 1.8 V and 2.5 V Power Sequencing (Schottky Diode).........................................187
Figure 103. Example 1.8V/3.3V Power Sequencing Circuit ...................................................189
Figure 104. Example 3.3V/5V REF Sequencing Circuitry...................................................... 190
Figure 105. Use a GPO to Reduce DRCG Frequency...........................................................191
Figure 106. Example of ICH2 Power Plane Split....................................................................192
Table 1. Intel® 820E Chipset Platform Bandwidth Summary.................................................... 17
Table 2. AGP 2× Data/Strobe Association ...............................................................................33
Table 3. Placement Guidelines for Motherboard Routing Lengths...........................................35
Table 4. Copper Tab Area Calculation..................................................................................... 42
Table 5. RSL and Clocking Signal RIMM Connector Capacitance Recommendations ...........47
Table 6. Copper Tab Area Calculation..................................................................................... 48
Table 7. RSL Routing Layer Requirements..............................................................................50
Table 8. Line Matching and Via Compensation Example.........................................................53
Table 9. Signal List...................................................................................................................57
Table 10. AGP 2.0 Data/Strobe Associations...........................................................................62
Table 11. AGP 2.0 Routing Summary...................................................................................... 64
Table 12. TYPDET#/VDDQ Relationship....................................................................................67
Table 13. Connector / Add-in Card Interoperability.................................................................. 71
Table 14. Voltage / Data Rate Interoperability..........................................................................71
Table 15. 8-Bit Hub Interface Buffer Configuration Setting ......................................................75
Table 16. 8-Bit Hub Interface HUBREF Generation Circuit Specifications ..............................76
Table 17. 8-Bit Hub Interface RCOMP Resistor Values...........................................................77
Table 18. Signal Descriptions...................................................................................................89
Table 19. Codec Configurations...............................................................................................90
Table 20. Pull-Up Requirements for SMBus and SMLink Signals............................................95
Table 21. Usage of I/O APIC Interrupt Inputs 16 through 23..................................................101
Table 22. LAN Design Guide Section Reference................................................................... 103
Table 23. Length Requirements for Figure 66........................................................................105
Table 24. Related Documents................................................................................................112
Table 25. Decoupling Capacitor Recommendation................................................................122
Table 26. PCI Interface...........................................................................................................125
Table 27. Hub Interface..........................................................................................................126
Table 28. LAN Interface..........................................................................................................126
Table 29. EEPROM Interface.................................................................................................126
Table 30. FWH Flash BIOS Interface.....................................................................................126
Table 31. Interrupt Interface...................................................................................................127
Table 32. GPIO.......................................................................................................................128
Table 33. USB Interface.........................................................................................................128
Table 34. Power Management ...............................................................................................129
Table 35. Processor Signals...................................................................................................129
Table 36. System Management..............................................................................................130
Table 37. RTC........................................................................................................................130
Table 38. AC’97......................................................................................................................130
Table 39. Miscellaneous Signals............................................................................................131
Table 40. Power......................................................................................................................131
Table 41. IDE Checklist..........................................................................................................132
Table 42. ISA Bridge Checklist...............................................................................................133
Table 43. 8-Bit Hub Interface..................................................................................................134
Table 44. IDE Interface...........................................................................................................134