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Intel VC820 Design Guide - Page 215

Top Block Lock, For drive side detection, stuff R304, R307. No stuff R305, R306.

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8 7 6 5 4 3 2 FWH D VCC3_3 Do not tie Vpp to 12V. Vpp should be tied to VCC3_3 for onboard programming. VCC3_3 C300 C305 0.1UF 0.1UF C 24 S66DETECT 24 P66DETECT R306 0K R305 0K For drive side detection, stuff R304,R307. No stuff R305,R306. For host side detection, stuff R304,R305,R306,R307. 7 R299 0K 8,10,13,14,18,21,22,23,24 R303 8.2K VCC3_3 VCC3_3 U16 R296 1 FWH_IC 2 8.2K 3 4 5 R298 6 FGPI4 7 8.2K 8 FWHPCLK 9 10 VPP_R 11 PCIRST# 12 13 14 R300 FGPI3 15 8.2K FGPI2 16 FGPI1 17 FGPI0 18 19 20 NC1 IC NC3 NC4 NC5 NC6 FGPI4 NC8 CLK VCC10 VPP RST# NC13 NC14 FGPI3 FGPI2 FGPI1 FGPI0 WP# TBL# GNDA 40 VCCA 39 FWH4 38 INIT# 37 FWH RFU36 36 RFU35 35 RFU34 34 RFU33 33 RFU32 32 VCC31 31 GND30 30 GND29 29 FWH3 28 FWH2 27 FWH1 26 FWH0 25 ID0 24 ID1 23 ID2 22 ID3 21 R307 15K R304 15K R308 4.7K WPROT B JP21 Top Block Lock TBLK_LCK R310 4.7K FW H OUT IN JP21 Locked Unlocked* VCC3_3 C301 C298 C297 C308 0.1UF 0.1UF 0.1UF 0.1UF LFRAME#/FWH4 HINIT# 11,14 4,6,10,34 LAD3/FWH3 LAD2/FWH2 LAD1/FWH1 LAD0/FWH0 11,14 11,14 11,14 11,14 1 D C B A A TITLE: INTEL(R) 820 CHIPSET DUAL PROCESSOR CUSTOMER REFERENCE BOARD REV: FWH 3.03 R PCD PLATFORM DESIGN DRAWN BY: PROJECT: 1900 PRAIRIE CITY ROAD FOLSOM, CALIFORNIA 95630 LAST REVISED: SHEET: 11-29-1999_14:46 12 OF 38 8 7 6 5 4 3 2 1

Section	Page
Introduction 1	13
1.1 About This Design Guide	13
1.2 References	14
1.3 System Overview	14
1.3.1 Chipset Components	15
1.3.2 Bandwidth Summary	16
1.3.3 System Configuration	17
1.4 Platform Initiatives	20
1.4.1 Direct Rambus*	20
1.4.2 Streaming SIMD Extensions	20
1.4.3 AGP 2.0	20
1.4.4 Hub Interface	20
1.4.5 Manageability	21
1.4.6 AC’97	22
1.4.7 Low Pin Count (LPC) Interface	23
Layout/Routing Guidelines 2	27
2.1 General Recommendations	27
2.2 Component Quadrant Layout	27
2.3 Intel® 820 Chipset Component Placement	29
2.4 Core Chipset Routing Recommendations	30
2.5 Source Synchronous Strobing	31
2.6 Direct Rambus* Interface	33
2.6.1 Stackup	34
2.6.2 Direct Rambus* Layout Guidelines	34
2.6.2.1 RSL Routing	34
2.6.2.2 RSL Termination	37
2.6.2.3 Direct Rambus* Ground Plane Reference	39
2.6.2.4 Direct Rambus* Connector Compensation	40
2.6.2.5 RSL Signal Layer Alternation	46
2.6.2.6 Length Matching Methods	47
2.6.2.7 VIA Compensation	49
2.6.2.8 Length Matching & Via Compensation Example	49
2.6.3 Direct Rambus* Reference Voltage	51
2.6.4 High-speed CMOS Routing	51
2.6.4.1 SIO Routing	52
2.6.4.2 Suspend-to-RAM Shunt Transistor	52
2.6.5 Direct Rambus* Clock Routing	54
2.6.6 Direct Rambus* Design Checklist	54
2.7 AGP 2.0	57
2.7.1 AGP Interface Signal Groups	58
2.7.2 1X Timing Domain Routing Guidelines	59
2.7.3 2X/4X Timing Domain Routing Guidelines	59
2.7.4 AGP 2.0 Routing Summary	61
2.7.5 AGP Clock Routing	62
2.7.6 General AGP Routing Guidelines	62
2.7.7 VDDQ Generation and TYPEDET#	63
2.7.8 VREF Generation for AGP 2.0 (2X and 4X)	65
2.7.9 Compensation	67
2.7.10 AGP Pull-ups	67
2.7.10.1 AGP Signal Voltage Tolerance List	68
2.7.11 Motherboard / Add-in Card Interoperability	68
2.8 Hub Interface	69
2.8.1 Data Signals	70
2.8.2 Strobe Signals	70
2.8.3 HREF Generation/Distribution	70
2.8.4 Compensation	71
2.9 System Bus Design	72
2.9.1 100/133 MHz System Bus	72
2.9.2 System Bus Ground Plane Reference	73
2.10 S.E.C.C. 2 Grounding Retention Mechanism (GRM)	73
2.11 Processor CMOS Pullup Values	75
2.12 Additional Host Bus Guidelines	78
2.13 Ultra ATA/66	82
2.13.1 Ultra ATA/66 Detection	82
2.13.2 Ultra ATA/66 Cable Detection	83
2.13.3 Ultra ATA/66 Pullup/Pulldown Requirements	86
2.14 AC’97	87
2.14.1 AC’97 Signal Quality Requirements	89
2.14.2 AC’97 Motherboard Implementation	89
2.15 USB	91
2.16 ISA (82380AB)	92
2.16.1 ICH GPIO connected to 82380AB	92
2.16.2 Sub Class Code	92
2.17 IOAPIC Design Recommendation	92
2.18 SMBus/Alert Bus	93
2.19 PCI	93
2.20 RTC	93
2.20.1 RTC Crystal	94
2.20.2 External Capacitors	94
2.20.3 RTC Layout Considerations	95
2.20.4 RTC External Battery Connection	95
2.20.5 RTC External RTCRST Circuit	96
2.20.6 RTC Routing Guidelines	96
2.20.7 VBIAS DC Voltage and Noise Measurements	97
Advanced System Bus Design 3	101
3.1 Terminology and Definitions	101
3.2 AGTL+ Design Guidelines	104
3.2.1 Initial Timing Analysis	105
3.2.2 Determine General Topology, Layout, and Routing Desired	108
3.2.3 Pre-Layout Simulation	108
3.2.3.1 Methodology	108
3.2.3.2 Sensitivity Analysis	108
3.2.3.3 Monte Carlo Analysis	109
3.2.3.4 Simulation Criteria	109
3.2.4 Place and Route Board	110
3.2.4.1 Estimate Component To Component Spacing for AGTL+ Signals	110
3.2.4.2 Layout and Route Board	110
3.2.4.3 Host Clock Routing	112
3.2.4.4 APIC Data Bus Routing	112
3.2.5 Post-Layout Simulation	113
3.2.5.1 Intersymbol Interference	113
3.2.5.2 Cross-Talk Analysis	113
3.2.5.3 Monte Carlo Analysis	113
3.2.6 Validation	114
3.2.6.1 Measurements	114
3.2.6.2 Flight Time Simulation	114
3.2.6.3 Flight Time Hardware Validation	115
3.3 Theory	115
3.3.1 AGTL+	115
3.3.2 Timing Requirements	116
3.3.3 Cross-talk Theory	116
3.3.3.1 Potential Termination Cross-Talk Problems	118
3.4 More Details and Insight	119
3.4.1 Textbook Timing Equations	119
3.4.2 Effective Impedance and Tolerance/Variation	120
3.4.3 Power/Reference Planes, PCB Stackup, and High Frequency Decoupling	120
3.4.3.1 Power Distribution	120
3.4.3.2 Reference Planes and PCB Stackup	121
3.4.3.3 High Frequency Decoupling	122
3.4.3.4 SC242 Connector	123
3.4.4 Clock Routing	123
3.5 Definitions of Flight Time Measurements/ Corrections and Signal Quality	124
3.5.1 VREF Guardband	124
3.5.2 Ringback Levels	124
3.5.3 Overdrive Region	124
3.5.4 Flight Time Definition and Measurement	125
3.6 Conclusion	126
Clocking 4	129
4.1 Clock Generation	129
4.2 Component Placement and Interconnection Layout Requirements	134
4.2.1 14.318MHz Crystal to CK133	134
4.2.2 CK133 to DRCG	134
4.2.3 MCH to DRCG	135
4.2.4 DRCG to RDRAM Channel	136
4.2.5 Trace Length	136
4.3 DRCG Impedance Matching Circuit	138
4.3.1 DRCG Layout Example	139
4.4 AGP Clock Routing Guidelines	139
4.5 Series Termination Resistors for CK133 Clock Outputs	139
4.6 Unused Outputs	140
4.7 Decoupling Recommendation for CK133 and DRCG	140
4.8 DRCG Frequency Selection and the DRCG+	140
4.8.1 DRCG Frequency Selection Table and Jitter Specification	140
4.8.2 DRCG+ Frequency Selection Schematic	141
System Manufacturing 5	145
5.1 In Circuit FWH Flash BIOS Programming	145
5.2 FWH Flash BIOS Vpp Design Guidelines	145
5.3 Stackup Requirement	145
5.3.1 Overview	145
5.3.2 PCB Materials	146
5.3.3 Design Process	146
5.3.4 Test Coupon Design Guidelines	147
5.3.5 Recommended Stackup	147
5.3.6 Inner Layer Routing	147
5.3.7 Impedance Calculation Tools	148
5.3.8 Testing Board Impedance	148
5.3.9 Board Impedance/Stackup Summary	149
System Design Considerations 6	153
6.1 Power Delivery	153
6.1.1 Terminology and Definitions	153
6.1.2 Intel® 820 Chipset Customer Reference Board Power Delivery	154
6.1.3 64/72Mbit RDRAM Excessive Power Consumption	157
6.1.3.1 Option 1: Reduce the Clock Frequency During Initialization	158
6.1.3.2 Option 2: Increase the Current Capability of the 2.5V Voltage Regulator	158
6.2 Power Plane Splits	159
6.3 Thermal Design Power	159
6.4 Glue Chip 3 (Intel® 820 Chipset Glue Chip)	160
Appendix A: Reference Board Schematics: Uni-Processor	161
Reference Design Schematics: Uni-Processor A	163
Appendix B: Reference Design Schematics: Dual-Processor B	201

Match case Limit results 1 per page

11-29-1999_14:46

FWH

8.2K

R303

FGPI0

FGPI1

R307

15K

R304

15K

TBLK_LCK

11,14

LFRAME#/FWH4

11,14

LAD3/FWH3

LAD2/FWH2

11,14

LAD1/FWH1

11,14

LAD0/FWH0

11,14

8,10,13,14,18,21,22,23,24

PCIRST#

FWHPCLK

WPROT

4,6,10,34

HINIT#

R299

JP21

4.7K

R308

8.2K

R298

R296

8.2K

VPP_R

FGPI3

FGPI2

FGPI4

FWH_IC

U16

C300

0.1UF

C305

0.1UF

C301

0.1UF

C298

0.1UF

C297

0.1UF

C308

R306

S66DETECT

P66DETECT

R305

4.7K

R310

8.2K

R300

PCD PLATFORM DESIGN

REV:

DRAWN BY:

LAST REVISED:

PROJECT:

SHEET:

FOLSOM, CALIFORNIA 95630

1900 PRAIRIE CITY ROAD

TITLE: INTEL(R) 820 CHIPSET DUAL PROCESSOR CUSTOMER REFERENCE BOARD

3.03

OF 38

VCC3_3

NC1

NC3

NC4

NC5

NC6

NC8

CLK

VCC10

VPP

RST#

NC13

NC14

WP#

TBL#

ID3

ID2

ID1

ID0

FWH0

FWH1

FWH2

FWH3

GND29

GND30

VCC31

RFU32

RFU33

RFU34

RFU35

RFU36

INIT#

FWH4

VCCA

GNDA

FGPI4

FGPI3

FGPI2

FGPI1

FGPI0

FWH

Top Block Lock

to VCC3_3 for onboard programming.

Do not tie Vpp to 12V.

Vpp should be tied

For host side detection, stuff R304,R305,R306,R307.

For drive side detection, stuff R304,R307. No stuff R305,R306.

FWH

JP21

OUT

Locked

Unlocked*