Intel 440GX manual Contents

Contents

1	Introduction				1-1
	1.1	About This Design Guide			1-1
	1.2	References			1-2
	1.3	Intel® Pentium® II Processor / Intel®440GX AGPset Overview			1-3
		1.3.1	Intel® Pentium® II Processor		1-3
		1.3.2	Intel® 440GX AGPset		1-4
			1.3.2.1	System Bus Interface	1-5
			1.3.2.2	DRAM Interface	1-5
			1.3.2.3	Accelerated Graphics Port Interface	1-5
			1.3.2.4	PCI Interface	1-6
			1.3.2.5	System Clocking	1-6
		1.3.3	PCI-to-ISA/IDE Xcelerator (PIIX4E)		1-6
			1.3.3.1	Instrumentation	1-7
			1.3.3.2	Remote Service Boot	1-7
			1.3.3.3	Remote Wake-Up	1-8
			1.3.3.4	Power Management	1-8
	1.4	Design Recommendations			1-8
		1.4.1	Voltage Definitions		1-8
		1.4.2	General Design Recommendations		1-9
		1.4.3	Transitioning from Intel“ 440BX AGPset to Intel“ 440GX
			AGPset Design		1-9
2	Motherboard Layout and Routing Guidelines				2-1
	2.1	BGA Quadrant Assignment			2-1
	2.2	Board Description			2-3
	2.3	Routing Guidelines			2-5
		2.3.1	GTL+ Description		2-6
		2.3.2	GTL+ Layout Recommendations		2-6
		2.3.3	Single Processor Design		2-6
			2.3.3.1	Single Processor Network Topology and Conditions	2-6
			2.3.3.2	Single Processor Recommended Trace Lengths	2-7
		2.3.4	Dual Processor Systems		2-8
			2.3.4.1	Dual Processor Network Topology and Conditions	2-8
			2.3.4.2	Dual Processor Recommended Trace Lengths	2-8
		2.3.5	Single Processor Systems—Single-End Termination (SET)		2-8
			2.3.5.1	Set Network Topology and Conditions	2-8
			2.3.5.2	SET Trace Length Requirements	2-9
		2.3.6	Additional Guidelines		2-10
			2.3.6.1	Minimizing Crosstalk	2-10
			2.3.6.2	Practical Considerations	2-10
		2.3.7	Design Methodology		2-11
		2.3.8	Performance Requirements		2-12
		2.3.9	Topology Definition		2-13
		2.3.10	Pre-Layout Simulation (Sensitivity Analysis)		2-13
	2.4	Placement & Layout			2-14
	2.5	Post-Layout Simulation			2-14
		2.5.1	Crosstalk and the Multi-Bit Adjustment Factor		2-15

Intel®440GX AGPset Design Guide iii