Intel 740 - Page 172

Revision History8

Introduction9

About this Design Guide11

References12

Addin Card Design15

Introduction15

Design Features16
- Intel740™ Graphics Accelerator16

MIX and Match Options for Intel740™ Graphics Accelerator Card16

Intel740™ Graphics Accelerator Power Supplies17

Example of Power Plane Separation ("Fencing")18

Example of Power Plane Stitching18

Major Signal Sections19

Board Description20

Layout and Routing Guidelines19

Placement19

Example ATX Layout20

Four Layer Board Stack-Up21

BGA Component22
- Layout Requirements22

Metal Defined Land Dimensions22

BGA Trace22

Dogbone Via Pattern23

Decoupling24

Suggested VCC Planes for the Intel740™ Graphics Accelerator24

Intel740™ Graphics Accelerator Decoupling24

Intel740™ Graphics Accelerator BGA Routing Example25

Bt829B GND and AGND Pins26

Bt829B VCC and AVCC Pins26

Bt869 Digital and Analog Power Pins27

AGP Signal Lengths27

Strobes and Corresponding Signal Groups27

Intel740™ Graphics Accelerator Memory Layout and Routing Guidelines28

Supported Memory Options28

Memory Layout Restrictions (See Figure 2-12 and Figure 2-13)28

Memory Layout Restrictions (See Figure 2-14 and Figure 2-15)29

Layout Dimensions (MA[11:0])29

Layout Dimensions (MD[63:0], DQM[7:0])29

Layout Dimensions (WEA#, SRASA#, SCASA#, CSA1#, CSB0#)29

Memory Layout Restrictions (See Figure 2-16 and Figure 2-17)30

Intel740™ Graphics Accelerator Memory Configurations31

Layout Dimensions (WEB#, SRASB#, SCASB#, CSA0#)30

Memory Layout Dimensions (TCLK0)30

Memory Layout Dimensions (TCLK1)30

Memory Layout Dimensions (RCLK and OCLK to RCLK)31

MB Local Memory Connection (64-Bit Data Path)31

TV Out/Roma Trace Lengths (See Figure 2-22)34

Layout Dimensions, Digital TV Bus34

GPIO Functions35

Addin Card Schematics35

512Kx32 and 256Kx32 Pinout Compatibility38

Device AGP Motherboard Design59

Introduction59

State of Signals to be Driven after System Reset but at Least One Clock Prior to Asserting TEST62

GPO27# and GPO28# Signal Duration63

The Schematic Diagram for GPO27#, PCIRST# (System Reset), RESET#, ROMA16 Signals62

Signal Duration of the GPO Signals from PIIX463

State Diagrams64

The Schematic Diagram for the WEB#, SCASB#, SRASB#, CS0B#, CS1B# and TEST63

Intel740™ Graphics Controller (on Board Device) Remains in Low Power Mode64

Intel740™ Graphics Controller (on Board Device) State Diagram64

Point-To-Point Topology66

Design Recommendations67
- General Design Recommendation67
- Voltage Definitions67

Device AGP Motherboard Layout and Routing Guidelines67

BGA Quadrant Assignment68

Major Signal Sections68

Example ATX Placement for a up Pentium69

Four Layer Board Stack-Up70

Data and Strobe Definitions71

Data and Associated Strobe71

Data Signal and Strobe Guideline Assumptions72

Control and Clock Signal Guideline Assumptions72

Data Signal and Strobe Requirements72

Control Signal Line Length Requirements73

Point-To-Point Topology73

Strobe and Data Segment Solution Space74

Device Data Load Topology74

Device Strobe Load Topology74

Device Data Load Topology (Solution 1 Is Shown)75

Device Strobe Load Topology (Solution 1 Is Shown)75

Clock Topology and Matching75

Intel740™ Graphics Accelerator Memory Layout and Routing Guidelines76

Clock Segment Solution Space76

Supported Memory Options76

Memory Layout Restrictions (See Figure 3-16 and Figure 3-17)77

Memory Layout Restrictions (See Table 3-16 and Table 3-17)77

Layout Dimensions (MA[11:0])77

Layout Dimensions (MD[63:0], DQM[7:0])77

Memory Layout Restrictions (See Figure 3-19)78

Device AGP Intel740™ Graphics Accelerator Memory Configurations79

Layout Dimensions (WEA#, SRASA#, SCASA#, CSA0#)78

Memory Layout Dimensions (TCLK1)78

Memory Layout Dimensions (RCLK and OCLK to RCLK)79

Pentium80

Device AGP Motherboard Reference Design Schematics80

512Kx32 and 256Kx32 Pinout Compatibility84

Thermal Considerations128

Thermal Design Considerations Chart130

Mechanical Information132

Mounting Hole Locations (Fan/Heatsink Assembly)134

Board Dimensions134

Fan/Heatsink Hole Pattern134

DVD Daughter Card Dimensions (ATX and NLX)-Top Side135

VMI Header Placement135

Pin Video Connector Schematic136

Pin Video Connector136

Recommended Bracket Placement137

Recommended Bracket Cutout137

Bracket137

NLX Considerations138

Third Party Vendors140

Video Encoders/Decoders142

DVD Daughter Cards143

TV Tuner143

Application Note 653: Thermal Design Considerations146

Intel 740 - Page 172

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