Download Intel Pentium III

Pentium® III Processor for the PGA370 Socket at 500 MHz to 1.13 GHz
Contents
1.0
Introduction .................................................................................................................. 8
1.1
1.2
2.0
Electrical Specifications ........................................................................................13
2.1
2.2
2.3
2.4
2.5
2.6
2.7
2.8
2.9
2.10
2.11
2.12
3.0
Processor System Bus and VREF ........................................................................13
Clock Control and Low Power States..................................................................14
2.2.1 Normal State—State 1 ...........................................................................15
2.2.2 AutoHALT Powerdown State—State 2...................................................15
2.2.3 Stop-Grant State—State 3 .....................................................................16
2.2.4 HALT/Grant Snoop State—State 4 ........................................................16
2.2.5 Sleep State—State 5..............................................................................16
2.2.6 Deep Sleep State—State 6 ....................................................................17
2.2.7 Clock Control..........................................................................................17
Power and Ground Pins ......................................................................................17
2.3.1 Phase Lock Loop (PLL) Power...............................................................18
Decoupling Guidelines .......................................................................................19
2.4.1 Processor VCCCORE and AGTL+ (AGTL) Decoupling ...........................19
Processor System Bus Clock and Processor Clocking .......................................19
2.5.1 Mixing Processors of Different Frequencies...........................................20
Voltage Identification ...........................................................................................20
Processor System Bus Unused Pins...................................................................22
Processor System Bus Signal Groups ................................................................22
2.8.1 Asynchronous vs. Synchronous for System Bus Signals .......................24
2.8.2 System Bus Frequency Select Signals (BSEL[1:0]) ...............................25
Maximum Ratings................................................................................................26
Processor DC Specifications...............................................................................27
2.10.1 ICC Slew Rate Specifications.................................................................33
AGTL / AGTL+ System Bus Specifications .........................................................36
System Bus AC Specifications ............................................................................37
2.12.1 I/O Buffer Model .....................................................................................37
Signal Quality Specifications ..............................................................................46
3.1
3.2
3.3
3.4
Datasheet
Terminology........................................................................................................... 9
1.1.1 Package and Processor Terminology ...................................................... 9
1.1.2 Processor Naming Convention...............................................................10
Related Documents.............................................................................................11
BCLK/BCLK# and PICCLK Signal Quality Specifications and Measurement
Guidelines ...........................................................................................................46
AGTL+ / AGTL Signal Quality Specifications and Measurement Guidelines ......47
AGTL+ Signal Quality Specifications and Measurement Guidelines ..................48
3.3.1 Overshoot/Undershoot Guidelines .........................................................48
3.3.2 Overshoot/Undershoot Magnitude .........................................................49
3.3.3 Overshoot/Undershoot Pulse Duration...................................................49
3.3.4 Activity Factor .........................................................................................49
3.3.5 Reading Overshoot/Undershoot Specification Tables............................50
3.3.6 Determining if a System Meets the Overshoot/Undershoot
Specifications .........................................................................................51
Non-AGTL+ (Non-AGTL) Signal Quality Specifications and Measurement
3