Datasheet
3
Contents
Introduction ................................................................................................................11 Terminology.........................................................................................................13
Processor Packaging Terminology.........................................................13
Electrical Specifications........................................................................................15 System Bus and GTLREF ...................................................................................15
Power and Ground Pins ......................................................................................15
Decoupling Guidelines ........................................................................................16
VCC Decoupling .....................................................................................16
System Bus AGTL+ Decoupling.............................................................16
System Bus Clock (BCLK[1:0]) and Processor Clocking ....................................16
Bus Clock ..............................................................................................17
Voltage Identification ..........................................................................................20
Mixing Processors of Different Voltages ................................................21
Reserved or Unused Pins ...................................................................................22
System Bus Signal Groups .................................................................................22
Asynchronous GTL+ Signals...............................................................................24
Maximum Ratings................................................................................................24
Processor DC Specifications...............................................................................25
AGTL+ System Bus Specifications .....................................................................30
System Bus AC Specifications ............................................................................31
System Bus Signal Quality Specifications ....................................................47 System Bus Clock (BCLK) Signal Quality Specifications and Measurement
Guidelines ...........................................................................................................47
System Bus Signal Quality Specifications and Measurement Guidelines...........48
System Bus Signal Quality Specifications and Measurement Guidelines...........51
Overshoot/Undershoot Guidelines .........................................................51
Overshoot/Undershoot Magnitude .........................................................52
Overshoot/Undershoot Pulse Duration...................................................52
Activity Factor.........................................................................................52
Reading Overshoot/Undershoot Specification Tables............................53
Determining if a System Meets the Overshoot/Undershoot
Specifications .........................................................................................53
Mechanical Specifications....................................................................................57