Intel VC820 - Desktop Board Motherboard Manuals

Manuals and User Guides for Intel VC820 - Desktop Board Motherboard. We have 1 Intel VC820 - Desktop Board Motherboard manual available for free PDF download: Design Manual

Intel VC820 - Desktop Board Motherboard Design Manual (242 pages)

Chipset

Brand: Intel | Category: Computer Hardware | Size: 4.13 MB

Table of Contents
3
Revision History
9
Introduction
11
About this Design Guide
13
References
14
System Overview
14
Platform Initiatives
20
- Direct Rambus
  20
- Streaming SIMD Extensions
  20
- Agp 2.0
  20
- Hub Interface
  20
- Manageability
  21
AC'97 Connections
23
- Low Pin Count (LPC) Interface
  23
Layout/Routing Guidelines
27
General Recommendations
27
Component Quadrant Layout
27
MCH 324-Ubga Quadrant Layout (Top View)
28
ICH 241-Ubga Quadrant Layout (Top View)
28
Sample ATX MCH/ICH Component Placement
29
Intel ® 820 Chipset Component Placement
29
Primary Side MCH Core Routing Example (ATX)
30
Core Chipset Routing Recommendations
30
Secondary Side MCH Core Routing Example (ATX)
31
Source Synchronous Strobing
31
AGP 2X Data/Strobe Association
32
Data Strobing Example
32
Effect of Crosstalk on Strobe Signal
32
RIMM Diagram
33
- Stackup
  34
- Direct Rambus* Layout Guidelines
  34
Direct Rambus* Interface
33
Placement Guidelines for Motherboard Routing Lengths
35
RSL Routing Dimensions
35
RSL Routing Diagram
35
Primary Side RSL Breakout Example
36
Secondary Side RSL Breakout Example
37
Direct RDRAM Termination
37
Direct Rambus* Termination Example
38
Incorrect Direct Rambus* Ground Plane Referencing
39
Direct Rambus Ground Plane Reference
39
Copper Tab Area Calculation
41
Connector Compensation Example
42
- Bottom Layer
  46
- Rsl Signal Layer Alternation
  46
RSL Routing Layer Requirements
47
RSL Signal Layer Alternation
47
RDRAM Trace Length Matching Example
48
Dummy" Via Vs. Real "Via
49
Line Matching and Via Compensation Example
50
- Direct Rambus* Reference Voltage
  51
- High-Speed CMOS Routing
  51
Ramref Generation Example Circuit
51
High-Speed CMOS Termination
52
SIO Routing Example
52
RDRAM CMOS Shunt Transistor
53
- Direct Rambus* Clock Routing
  54
- Direct Rambus* Design Checklist
  54
Signal List
54
Agp 2.0
57
AGP 2.0 Data/Strobe Associations
59
Top Signal Layer
63
TYPDET#/VDDQ Relationship
64
- VREF Generation for AGP 2.0 (2X and 4X)
  65
AGP VDDQ Generation Example Circuit
65
AGP 2.0 VREF Generation & Distribution
66
- Compensation
  67
- AGP Pull-Ups
  67
- Motherboard / Add-In Card Interoperability
  68
Connector/Add-In Card Interoperability
68
Voltage/Data Rate Interoperability
68
Hub Interface Signal Routing Example
69
- Data Signals
  70
- Strobe Signals
  70
- HREF Generation/Distribution
  70
Hub Interface
69
Single Hub Interface Reference Divider Circuit
70
Locally Generated Hub Interface Reference Dividers
71
System Bus Design
72
Grounding Retention Mechanism (GRM)
73
Ground Plane Reference (Four Layer Motherboard)
73
Hole Locations and Keepout Zones for Support Components
74
Grounding Pad Dimensions for the SECC2 GRM
74
Processor CMOS Pullup Values
75
Processor and 82820 MCH Connection Checklist
75
Additional Host Bus Guidelines
78
Bus Request Connection Scheme for DP Intel
78
820 Chipset Designs
78
TCK/TMS Implementation Example for DP Designs
78
Single Processor BREQ Strapping Requirements
78
BREQ0# Circuitry for DP Systems
79
Dual-Processor BREQ Strapping Requirements
79
HA7# Strapping Option Example Circuit (for Debug Purposes Only)
80
Ultra ATA/66
82
- Ultra ATA/66 Detection
  82
- Ultra ATA/66 Cable Detection
  83
Host-Side IDE Cable Detection
83
Drive-Side IDE Cable Detection
84
Layout for Host- or Drive-Side IDE Cable Detection
85
Ultra ATA/66 Cable
85
- Ultra ATA/66 Pullup/Pulldown Requirements
  86
Resistor Requirements for Primary IDE Connector
86
- Ac'97
  87
Resistor Requirements for Secondary IDE Connector
87
ICH Codec Options
87
Tee Topology AC'97 Trace Length Requirements
88
Daisy-Chain Topology AC'97 Trace Length Requirements
88
- AC'97 Signal Quality Requirements
  89
- AC'97 Motherboard Implementation
  89
AC'97 SDIN Pulldown Resistors
89
USB Data Signals
91
Usb
91
Isa (82380Ab)
92
- ICH GPIO Connected to 82380AB
  92
- Sub Class Code
  92
IOAPIC Design Recommendation
92
PCI Bus Layout Example
93
- RTC Crystal
  94
- External Capacitors
  94
Smbus/Alert Bus
93
Pci
93
Rtc
93
External Circuitry for the ich RTC
94
- RTC Layout Considerations
  95
- RTC External Battery Connection
  95
Diode Circuit Connecting RTC External Battery
95
- RTC External RTCRST Circuit
  96
- RTC Routing Guidelines
  96
RTCRST External Circuit for the ich RTC
96
- VBIAS DC Voltage and Noise Measurements
  97
Advanced System Bus Design
99
Terminology and Definitions
101
AGTL+ Design Guidelines
104
- Initial Timing Analysis
  105
AGTL+ Parameters for Example Calculations
106
Example TFLT_MAX Calculations for 133 Mhz Bus
107
- Determine General Topology, Layout, and Routing Desired
  108
- Pre-Layout Simulation
  108
Example TFLT_MIN
108
- Place and Route Board
  110
Trace Width Space Guidelines
111
PICD[1,0] Uni-Processor Topology
112
PICD[1,0] Dual-Processor Topology
112
Host Clock Routing
112
- Post-Layout Simulation
  113
- Validation
  114
Test Load Vs. Actual System Load
114
Theory
115
- Agtl
  115
- Timing Requirements
  116
- Cross-Talk Theory
  116
Aggressor and Victim Networks
117
Transmission Line Geometry: (A) Microstrip (B) Stripline
117
More Details and Insight
119
One Signal Layer and One Reference Plane
121
Layer Switch with One Reference Plane
121
Layer Switch with Multiple Reference Planes (same Type)
121
Layer Switch with Multiple Reference Planes
122
One Layer with Multiple Reference Planes
122
- Clock Routing
  123
Definitions of Flight Time Measurements/Corrections and Signal Quality
124
- Ringback Levels
  124
- VREF Guardband
  124
- Overdrive Region
  124
REF Guardband
124
- Flight Time Definition and Measurement
  125
Overdrive Region and
125
Rising Edge Flight Time Measurement
125
Conclusion
126
Clocking
127
Intel ® 820 Chipset Platform System Clocks
129
Clock Generation
129
Component Placement and Interconnection Layout Requirements
134
- 14.318 Mhz Crystal to CK133
  134
- CK133 to DRCG
  134
CK133 to DRCG Routing Diagram
134
- MCH to DRCG
  135
MCH to DRCG Routing Diagram
135
Direct Rambus* Clock Routing Dimensions
135
- DRCG to RDRAM Channel
  136
- Trace Length
  136
Placement Guidelines for Motherboard Routing Lengths
136
Trace Geometry
136
Differential Clock Routing Diagram (Section 'A', 'C', & 'D')
137
Non-Differential Clock Routing Diagram (Section 'B')
137
Termination for Direct Rambus* Clocking Signals CFM/CFM
137
DRCG Impedance Matching Circuit
138
External DRCG Component Values
138
- DRCG Layout Example
  139
DRCG Impedance Matching Network
138
AGP Clock Routing Guidelines
139
Series Termination Resistors for CK133 Clock Outputs
139
- Bottom Layer
  139
Unused Outputs
140
Decoupling Recommendation for CK133 and DRCG
140
DRCG Frequency Selection and the DRCG
140
- DRCG Frequency Selection Table and Jitter Specification
  140
Unused Output Termination
140
DRCG Ratio
140
- DRCG+ Frequency Selection Schematic
  141
DRCG+ Frequency Selection
141
System Manufacturing
143
In Circuit LPC Flash BIOS Programming
145
Stackup Requirement
145
- Overview
  145
- PCB Materials
  146
- Design Process
  146
- Ω Trace Geometry
  146
- Test Coupon Design Guidelines
  147
- Recommended Stackup
  147
- Inner Layer Routing
  147
- Ω Stackup Examples
  147
- Impedance Calculation Tools
  148
- Testing Board Impedance
  148
- Microstrip and Stripline Cross-Section for 28 Ω Trace
  148
D Field Solver Vs ZCALC
148
- Board Impedance/Stackup Summary
  149
Mil Stackup (Not Routable)
149
Mil Stackup
149
System Design Considerations
151
Power Delivery
153
- Terminology and Definitions
  153
V and 2.5V Power Sequencing (Schottky Diode)
156
- 64/72Mbit RDRAM Excessive Power Consumption
  157
Use a GPO to Reduce DRCG Frequency
158
Power Plane Splits
159
Thermal Design Power
159
Power Plane Split Example
159
Glue Chip 3 Vendors
160
Reference Design Schematics: Uni-Processor
163
Reference Design Feature Set
163
- Usb Connectors
  186
- Power Connector
  194
Reference Design Schematics: Dual-Processor
203
Reference Design Feature Set
203

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Intel VC820 - Desktop Board Motherboard Design Manual (242 pages)

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