
Intel Xeon Processor MP with up to 2MB L3 Cache
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Contents
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 Specifications...... 3-7
Mechanical Specifications .................................................................................................. 4-1