80525PY600512 参数 Datasheet PDF下载

Pentium

®

III Processor for the SC242 at 450 MHz to 733 MHz

Contents

1.0

Introduction......................................................................................................................... 9

1.1

Terminology.........................................................................................................10

1.1.1 S.E.C.C.2 and S.E.C.C. Packaged Processor Terminology ..................10

1.1.2 Processor Naming Convention...............................................................11

Related Documents.............................................................................................11

Processor System Bus and V

REF .......................................................................................... 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 .....................................................................15

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 ....................................................................16

2.2.7 Clock Control..........................................................................................17

Power and Ground Pins ......................................................................................17

Decoupling Guidelines ........................................................................................17

2.4.1 Processor VCC

CORE

Decoupling............................................................17

2.4.2 Processor System Bus AGTL+ Decoupling............................................18

Processor System Bus Clock and Processor Clocking .......................................18

Voltage Identification ...........................................................................................18

Processor System Bus Unused Pins...................................................................20

Processor System Bus Signal Groups ................................................................20

2.8.1 Asynchronous vs. Synchronous for System Bus Signals .......................21

2.8.2 System Bus Frequency Select Signal (BSEL0)......................................21

Test Access Port (TAP) Connection....................................................................23

Maximum Ratings................................................................................................24

Processor DC Specifications...............................................................................25

AGTL+ System Bus Specifications .....................................................................29

System Bus AC Specifications ............................................................................30

BCLK, PICCLK, and PWRGOOD Signal Quality Specifications and

Measurement Guidelines ....................................................................................39

AGTL+ and Non-AGTL+ Overshoot/Undershoot Specifications and

Measurement Guidelines ....................................................................................40

3.2.1 Overshoot/Undershoot Magnitude .........................................................40

3.2.2 Overshoot/Undershoot Pulse Duration...................................................41

3.2.3 Overshoot/Undershoot Activity Factor....................................................41

3.2.4 Reading Overshoot/Undershoot Specification Tables............................42

3.2.5 Determining if a System meets the Overshoot/Undershoot

Specifications .........................................................................................43

AGTL+ and Non-AGTL+ Ringback Specifications and Measurement

Guidelines ...........................................................................................................45

3.3.1 Settling Limit Guideline...........................................................................47

1.2

2.0

2.1

2.2

Electrical Specifications....................................................................................................13

2.3

2.4

2.5

2.6

2.7

2.8

2.9

2.10

2.11

2.12

2.13

3.0

3.1

3.2

Signal Quality Specifications ............................................................................................39

3.3

Datasheet

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