Design Recommendations; Voltage Definitions; General Design Recommendation; Device Agp Motherboard Layout And Routing Guidelines - Intel 740 Design Manual

3.1.6

Design Recommendations

3.1.6.1

Voltage Definitions

For the purposes of this document the following nominal voltage definitions are used:
3.1.6.2

General Design Recommendation

For general design recommendations, refer to the Intel 440BX AGPset Design Guide sections 1.4.2
and 1.4.3.
3.2 3 Device AGP Motherboard Layout and Routing
Guidelines
This section describes layout and routing recommendations to insure a robust design. Follow these
guidelines as closely as possible. Any deviations from the guidelines listed should be simulated to
insure adequate margin is still maintained in the design. Since the concentration of this section is
mainly 3 Device AGP implementation, refer to the Intel 440BX AGPset Design Guide for the
remaining design guidelines. It would be beneficial to have that design guide before tying to read
this section. Sections that are referred to the Intel 440BX AGPset Design Guide are:
•
Routing Guidelines
— GTL+ Description
— GTL+ Layout Recommendations
— Single Processor Design
— Additional Guidelines
— Design Methodology
— Performance Requirements
— Topology Definition
— Pre-Layout Simulation (Sensitivity Analysis)
— Placement & Layout
•
Placement & Layout
•
Post-Layout Simulation
•
Validation
— Flight Time Measurement
— Signal Quality Measurement
Intel740™ Graphics Accelerator Design Guide
Vcc 5.0V
Vcc 3.3V
3.3
Vcc Voltage is dependent on the five bit VID setting
CORE
Vcc 2.5V
2.5
V 1.5V
TT
V 1.0V
REF
AGPV 3.3V
REF
+2_7 2.7V
VDDQ3 3.3V
3 Device AGP MotherBoard Design
3-9