Intel Pentium 4 Design Manual page 16

Introduction
Revision History
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• Initial revision.
• Added ICH2 RTC Section 9.8.8 Power-well Isolation Control
• Added ICH2 RTC Section 9.8.9 Power Supply PS_ON Considerations
• Replaced ICH2 LAN Figure 121 Trace Routing
• Added ICH2 LAN Section 9.9.5 82562ET/EM Disable Guidelines
• Added ICH2 LAN Section 9.9.6 82562ET/82562EH Dual Footprint
Guidelines
• Added ICH2 Section 9.10 FWH Guidelines
• Updated ICH2 Section 12.6 ICH2 5VREF and Vcc3.3 Sequencing
Requirement
• Updated ICH2 Schematic Checklist Section 15.7.12 RTC
• Updated processor VCCVID recommendations – includes design guide
and schematic update.
• Updated processor TESTHI pin recommendations.
• Updated BCLK[1:0] frequency strapping recommendations.
• Clarified requirements for pull-ups on VID[4:0].
• Updated processor system bus topologies for RESET# and BR0#.
• Revised paragraph 3 in Section 12.6 ICH2 V5REF and VCC3_3
Sequencing Requirement
• Revised APIC in Section 15.7.6 Interrupt Interface in the Schematics
Checklist
• Revised V5REF_SUS in Section 15.7.15 Power in the Schematics
Checklist
• Revised 'Other Recommendations' in Section 11.4, Filter
Specifications for VCCA, VCCIOPLL, and VSSA
• Editing/formatting throughout for clarity
• Combined Chapters 1, 2, 3, and 4 into the Introduction Chapter.
• Renamed to 850 chipset family
• Added 82850E / 533MHz system bus design guidelines
• Added 4 Layer guidelines
• Added 82850E 533MHz (PC1066) RDRAM guidelines:
• Revised Table 22 in Rambus Signaling Levels in Section 6.1.1
• Added Differential Clock Guidelines for Stripline and Microstrip in
Section 6.1.2.3
• Added Direct RDRAM Reference Voltage in Section 6.1.4
• Added Section 6.1.8, RDRAM Channel Margin Improvement
• Added Section 6.1.9, 533 MHz (PC1066) RIMM Thermal Consideration
• Revised Section 15.6, Rambus RIMM* Connector Checklist
• Added FMB2 design guidelines into Section 11
• Separated FMB1 and FMB2 design guidelines
® ®
Intel Pentium 4 Processor / Intel
Description
®
850 Chipset Family Platform Design Guide
R
Date
August 2001
January 2002
February 2002
March 2002
May 2002
Oct 2002
Jan 2003
Jan 2003