Intel 521 Data Sheet - Page 5

Datasheet

5

Contents

Figures

2-1

Phase Lock Loop (PLL) Filter Requirements

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19

2-2

VCC Static and Transient Tolerance for 775_VR_CONFIG_04A

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28

2-3

VCC Static and Transient Tolerance for 775_VR_CONFIG_04B

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30

2-4

VCC Overshoot Example Waveform

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33

3-1

Processor Package Assembly Sketch

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35

3-2

Processor Package Drawing 1

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36

3-3


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37

3-4


...................................................................................................

38

3-5

Processor Top-Side Marking Example

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40

3-6

Processor Top-Side Marking Example for Processors Supporting Intel

®

EM64T

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41

3-7

Processor Land Coordinates (Top View)

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42

4-1

Landout Diagram (Top View – Left Side)

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44

4-2

Landout Diagram (Top View – Right Side)

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45

5-1

Thermal Profile for Processors with PRB = 1

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77

5-2

Thermal Profile for Processors with PRB = 0

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78

5-3

Case Temperature (TC) Measurement Location

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79

5-4

Thermal Monitor 2 Frequency and Voltage Ordering

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81

6-1

Processor Low Power State Machine

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87

7-1

Mechanical Representation of the Boxed Processor

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89

7-2

Space Requirements for the Boxed Processor (Side View)

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90

7-3

Space Requirements for the Boxed Processor (Top View)

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90

7-4

Space Requirements for the Boxed Processor (Overall View)

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91

7-5

Boxed Processor Fan Heatsink Power Cable Connector Description

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92

7-6

Baseboard Power Header Placement Relative to Processor Socket

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93

7-7

Boxed Processor Fan Heatsink Airspace Keepout Requirements (Top View)

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94

7-8

Boxed Processor Fan Heatsink Airspace Keepout Requirements (Side View)

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94

7-9

Boxed Processor Fan Heatsink Set Points

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95

Section	Page
Contents	3
Revision History	7
Intel® Pentium® 4 Processors 570/571, 560/561, 550/551, 540/541, 530/531, and 520/521	9
1 Introduction	11
1.1 Terminology	12
1.1.1 Processor Packaging Terminology	12
1.2 References	13
2 Electrical Specifications	15
2.1 FSB and GTLREF	15
2.2 Power and Ground Lands	15
2.3 Decoupling Guidelines	15
2.3.1 VCC Decoupling	16
2.3.2 FSB GTL+ Decoupling	16
2.3.3 FSB Clock (BCLK[1:0]) and Processor Clocking	16
2.4 Voltage Identification	17
2.4.1 Phase Lock Loop (PLL) Power and Filter	19
2.5 Reserved, Unused, FC and TESTHI Signals	20
2.6 FSB Signal Groups	21
2.7 GTL+ Asynchronous Signals	22
2.8 Test Access Port (TAP) Connection	23
2.9 FSB Frequency Select Signals (BSEL[2:0])	23
2.10 Absolute Maximum and Minimum Ratings	24
2.11 Processor DC Specifications	24
2.12 VCC Overshoot Specification	33
2.12.1 Die Voltage Validation	33
2.13 GTL+ FSB Specifications	34
3 Package Mechanical Specifications	35
3.1 Package Mechanical Drawing	35
3.2 Processor Component Keep-Out Zones	39
3.3 Package Loading Specifications	39
3.4 Package Handling Guidelines	39
3.5 Package Insertion Specifications	40
3.6 Processor Mass Specification	40
3.7 Processor Materials	40
3.8 Processor Markings	40
3.9 Processor Land Coordinates	41
4 Land Listing and Signal Descriptions	43
4.1 Processor Land Assignments	43
4.2 Alphabetical Signals Reference	66
5 Thermal Specifications and Design Considerations	75
5.1 Processor Thermal Specifications	75
5.1.1 Thermal Specifications	75
5.1.2 Thermal Metrology	79
5.2 Processor Thermal Features	79
5.2.1 Thermal Monitor	79
5.2.2 Thermal Monitor 2	80
5.2.3 On-Demand Mode	81
5.2.4 PROCHOT# Signal	82
5.2.5 THERMTRIP# Signal	82
5.2.6 TCONTROL and Fan Speed Reduction	82
5.2.7 Thermal Diode	83
6 Features	85
6.1 Power-On Configuration Options	85
6.2 Clock Control and Low Power States	85
6.2.1 Normal State	86
6.2.2 HALT and Enhanced HALT Powerdown States	86
6.2.2.1 HALT Powerdown State	86
6.2.2.2 Enhanced HALT Powerdown State	86
6.2.3 Stop-Grant State	87
6.2.4 Enhanced HALT Snoop or HALT Snoop State, Grant Snoop State	88
6.2.4.1 HALT Snoop State, Grant Snoop State	88
6.2.4.2 Enhanced HALT Snoop State	88
7 Boxed Processor Specifications	89
7.1 Mechanical Specifications	90
7.1.1 Boxed Processor Cooling Solution Dimensions	90
7.1.2 Boxed Processor Fan Heatsink Weight	91
7.1.3 Boxed Processor Retention Mechanism and Heatsink Attach Clip Assembly	91
7.2 Electrical Requirements	91
7.2.1 Fan Heatsink Power Supply	91
7.3 Thermal Specifications	93
7.3.1 Boxed Processor Cooling Requirements	93

Intel 521 Data Sheet - Page 5

Intel 521 - Pentium 4 521 2.8GHz 800MHz 1MB Socket 775 CPU Manual

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