Intel Pentium 4 641 HH80552PG0882M User Manual

3

Introduction.................................................................................................................................... 9

Terminology ........................................................................................................................ 10
1.1.1

Processor Packaging Terminology ........................................................................ 10

Electrical Specifications ............................................................................................................. 13

FSB and GTLREF............................................................................................................... 13

Power and Ground Lands ................................................................................................... 13

Decoupling Guidelines ........................................................................................................ 13
2.3.1

FSB GTL+ Decoupling........................................................................................... 14

FSB Clock (BCLK[1:0]) and Processor Clocking ................................................... 14

Voltage Identification .......................................................................................................... 15
2.4.1

Phase Lock Loop (PLL) Power and Filter .............................................................. 17

Reserved, Unused, FC and TESTHI Signals...................................................................... 18

FSB Signal Groups ............................................................................................................. 19

GTL+ Asynchronous Signals .............................................................................................. 20

Test Access Port (TAP) Connection ................................................................................... 21

Absolute Maximum and Minimum Ratings ......................................................................... 22

Processor DC Specifications .............................................................................................. 22

GTL+ FSB Specifications.................................................................................................... 30

Package Mechanical Specifications .......................................................................................... 33

Land Listing and Signal Descriptions ....................................................................................... 41

Alphabetical Signals Reference .......................................................................................... 64

Thermal Specifications and Design Considerations................................................................ 73