Datasheet
3
Contents
Introduction ...............................................................................................................11
Terminology......................................................................................................... 12
Processor Packaging Terminology......................................................... 12
Electrical Specifications........................................................................................15 System Bus and GTLREF ................................................................................... 15
Power and Ground Pins ...................................................................................... 15
Decoupling Guidelines ........................................................................................ 15
VCC Decoupling ..................................................................................... 16
System Bus AGTL+ Decoupling............................................................. 16
System Bus Clock (BCLK[1:0]) and Processor Clocking .................................... 16
Voltage Identification .......................................................................................... 19
Mixing Processors of Different Voltages ................................................ 20
Reserved Or Unused Pins................................................................................... 21
System Bus Signal Groups ................................................................................. 21
Asynchronous GTL+ Signals............................................................................... 23
Test Access Port (TAP) Connection.................................................................... 23
Maximum Ratings................................................................................................ 23
Processor DC Specifications............................................................................... 24
AGTL+ System Bus Specifications .....................................................................28
System Bus AC Specifications ............................................................................29
System Bus Signal Quality Specifications ....................................................41 System Bus Clock (BCLK) Signal Quality Specifications and Measurement
Guidelines ........................................................................................................... 41
System Bus Signal Quality Specifications and Measurement Guidelines...........42
Overshoot/Undershoot Guidelines ......................................................... 45
Overshoot/Undershoot Magnitude ......................................................... 45
Overshoot/Undershoot Pulse Duration................................................... 46
Activity Factor .........................................................................................46
Reading Overshoot/Undershoot Specification Tables............................ 46
Determining if a System Meets the Overshoot/Undershoot
Specifications .........................................................................................47
Mechanical Specifications....................................................................................51