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Intel Confidential
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Introduction..........................................................................................................1-1 Terminology ..................................................................................................1-3
Processor Packaging Terminology ..................................................1-3
Electrical Specifications .................................................................................2-1 System Bus and GTLREF.............................................................................2-1
Power and Ground Pins................................................................................2-1
Decoupling Guidelines ..................................................................................2-1
VCC Decoupling...............................................................................2-2
System Bus AGTL+ Decoupling ......................................................2-2
System Bus Clock (BCLK[1:0]) and Processor Clocking ..............................2-2
Bus Clock........................................................................................2-3
Voltage Identification....................................................................................2-6
Mixing Processors of Different Voltages ..........................................2-7
Reserved or Unused Pins .............................................................................2-8
System Bus Signal Groups ...........................................................................2-8
Asynchronous GTL+ Signals ........................................................................2-9
Maximum Ratings .......................................................................................2-10
Processor DC Specifications ......................................................................2-10
AGTL+ System Bus Specifications .............................................................2-16
System Bus AC Specifications....................................................................2-17
System Bus Signal Quality Specifications..............................................3-1 System Bus Clock (BCLK) Signal Quality Specifications and Measurement
Guidelines .....................................................................................................3-1
System Bus Signal Quality Specifications and Measurement Guidelines ....3-2
System Bus Signal Quality Specifications and Measurement Guidelines ....3-5
Overshoot/Undershoot Guidelines...................................................3-5
Overshoot/Undershoot Magnitude ...................................................3-6
Overshoot/Undershoot Pulse Duration ............................................3-6
Activity Factor ..................................................................................3-6
Reading Overshoot/Undershoot Specification Tables .....................3-7
Determining if a System Meets the Overshoot/Undershoot Specifica-
tions .................................................................................................3-7
Mechanical Specifications .............................................................................4-1 Thermal Specifications....................................................................................5-1 Thermal Specifications..................................................................................5-3
Measurements for Thermal Specifications....................................................5-5