Intel Pentium 4 Processor in the 478-PinPackage at 1.40 GHz, 1.50 GHz, 1.60 GHz, 1.70 GHz, 1.80 GHz, 1.90 GHz, and 2GHz

Datasheet 3
Contents
1.0 Introduction ..................................................................................................................7
1.1 Terminology........................................................................................................... 8
1.1.1 Processor Packaging Terminology...........................................................8
1.2 References ............................................................................................................ 9
2.0 Electrical Specifications........................................................................................11
2.1 System Bus and GTLREF ...................................................................................11
2.2 Power and Ground Pins ......................................................................................11
2.3 Decoupling Guidelines ........................................................................................11
2.3.1 VCC Decoupling .....................................................................................12
2.3.2 System Bus AGTL+ Decoupling............................................................. 12
2.3.3 System Bus Clock (BCLK[1:0]) and Processor Clocking .......................12
2.4 Voltage Identification ...........................................................................................12
2.4.1 Phase Lock Loop (PLL) Power and Filter...............................................14
2.5 Reserved, Unused, and TESTHI Pins.................................................................15
2.6 System Bus Signal Groups .................................................................................16
2.7 Asynchronous GTL+ Signals...............................................................................18
2.8 Test Access Port (TAP) Connection....................................................................18
2.9 System Bus Frequency Select Signals (BSEL[1:0])............................................18
2.10 Maximum Ratings................................................................................................19
2.11 Processor DC Specifications...............................................................................19
2.12 AGTL+ System Bus Specifications .....................................................................25
2.13 System Bus AC Specifications ............................................................................25
2.14 Processor AC Timing Waveforms .......................................................................29
3.0 System Bus Signal Quality Specifications ....................................................37
3.1 BCLK Signal Quality Specifications and Measurement Guidelines.....................37
3.2 System Bus Signal Quality Specifications and Measurement Guidelines...........38
3.3 System Bus Signal Quality Specifications and Measurement Guidelines...........41
3.3.1 Overshoot/Undershoot Guidelines .........................................................41
3.3.2 Overshoot/Undershoot Magnitude .........................................................42
3.3.3 Overshoot/Undershoot Pulse Duration...................................................42
3.3.4 Activity Factor.........................................................................................42
3.3.5 Reading Overshoot/Undershoot Specification Tables............................ 43
3.3.6 Determining if a System Meets the Over/Undershoot Specifications.....43
4.0 Package Mechanical Specifications................................................................. 47
4.1 Package Load Specifications ..............................................................................50
4.2 Processor Insertion Specifications ......................................................................51
4.3 Processor Mass Specifications ...........................................................................51
4.4 Processor Materials.............................................................................................51
4.5 Processor Markings.............................................................................................51
4.6 Processor Pin-Out Coordinates...........................................................................52
5.0 Pin Listing and Signal Definitions.....................................................................53
5.1 Intel® Pentium® 4 Processor in the 478-Pin Package Pin Assignments............53
5.2 Alphabetical Signals Reference .......................................................................... 69