AMD 27493, 10, 27488 manual Constants and Variables for the Ideal Diode Equation

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Preliminary Information

26237C —May 2003

AMD Athlon™ XP Processor Model 10 Data Sheet

Appendix A

Thermal Diode Calculations

This section contains information about the calculations for the on-die thermal diode of the AMD Athlon™ XP processor model

10.For electrical information about this thermal diode, see Table 13, “Thermal Diode Electrical Characteristics,” on page 37.

Ideal Diode Equation

The ideal diode equation uses the variables and constants defined in Table 28.

Table 28. Constants and Variables for the Ideal Diode Equation

Equation Symbol	Variable, Constant Description

nf, lumped	Lumped ideality factor
k	Boltzmann constant

q	Electron charge constant

T	Diode temperature (Kelvin)

VBE	Voltage from base to emitter
IC	Collector current
IS	Saturation current

Appendix A - Thermal Diode Calculations

81

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Contents Data Sheet 2002, 2003 Advanced Micro Devices, Inc. All rights reserved Table of Contents Mechanical Data Ordering Information Preliminary Information List of Figures Logic Symbol DiagramViii List of Tables List of Tables Date Rev Revision History, revised wording in the Overview MayXii Delivering extreme performance for Windows XP OverviewQuantiSpeed Architecture Summary LAN Preliminary Information Interface Signals Signaling TechnologyOverview Push-Pull PP Drivers AMD Athlon System Bus SignalsLogic Symbol Diagram Frequency Control Front-Side Bus Autodetect LegacyDiode Preliminary Information Power Management States Power ManagementHalt State Working StatePreliminary Information Connect and Disconnect Protocol Probe StateConnect Protocol Preliminary Information Procrdy Exiting the Stop Grant State and Bus Connect Sequence Connect State DiagramDisconnect request Connect Pending Disconnect Disconnect4/CReturn internal clocks to full speed and assert NorthbridgeClock Control Cpuid Support Preliminary Information Maximum Typical Maximum68.3 W 53.7 W 12.1 aParameter Description Minimum Maximum Advanced 333 FSB Sysclk and SYSCLK# AC CharacteristicsClock Frequency Duty CycleAdvanced 333 FSB AMD Athlon System Bus AC Characteristics Advanced 333 FSB AMD Athlon System Bus DC Characteristics Advanced 333 FSB AMD Athlon System Bus DC Characteristics12.1 a 68.3 W 53.7 W Maximum Typical 2100 3000+2200 3200+ 76.8 W 60.4 WAdvanced 400 FSB Sysclk and SYSCLK# AC Characteristics Advanced 400 FSB AMD Athlon System Bus AC Characteristics Advanced 400 FSB AMD Athlon System Bus DC Characteristics Advanced 400 FSB AMD Athlon System Bus DC CharacteristicsInterface Signal Groupings Interface Signal GroupingsElectrical Data ConventionsVoltage Identification VID40 VID40 DC CharacteristicsFID30 DC Characteristics Vcca AC and DC CharacteristicsVcca AC and DC Characteristics Frequency Identification FID30Vcccore AC and DC Characteristics Vcccore CharacteristicsVcccore Voltage Waveform Absolute Ratings Absolute RatingsSysclk and SYSCLK# DC Characteristics Sysclk and SYSCLK# DC CharacteristicsGeneral AC and DC Characteristics General AC and DC CharacteristicsSignal Fall Time Signal Rise TimeInput Time to Acquire Input Time to Reacquire50 Ω ±3% Open-Drain Pin IOL = Output Current2 Open Drain Test CircuitCharacteristics Thermal Diode CharacteristicsThermal Diode Electrical Characteristics Thermal DiodeSymbol Parameter Description Max Units Guidelines for Platform Thermal Protection of the Processor500 Apic Pin AC and DC Characteristics Apic Pins AC and DC CharacteristicsPreliminary Information Power-Up Requirements Signal and Power-Up RequirementsPwrok Preliminary Information Processor Warm Reset Requirements Clock MultiplierSelection FID30 Die Loading Mechanical DataMechanical Loading Location Dynamic MAX Static MAX Units Die Surface 100453 Letter or Minimum MaximumPreliminary Information Dimension 49.27 49.78 D1/E1 45.72 BSC 917 REF 42 REF 977 Preliminary Information Preliminary Information Pin Descriptions Pin Diagram and Pin Name AbbreviationsAMD Athlon XP Processor Bottomside View Pin Name Abbreviations AA31 Abbreviation Full Name Pin Q31 S31 U31 U37 W31 Y31 Y33AC31 AD30AJ35 AE33AG37 AL33J35 W33E27 E15F28 F24F32 F34AK36 AK34AM10 AM14V32 V30V34 V36Pin List Pin Name Cross-Reference by Pin LocationNo Pin A35 SDATA40# A37 SDATA30#E29 SDATA33# E31 SDATA32# Pin Name SDATA52# E11 SDATA50# E13 SDATA49# E15E33 NC Pin E35 SDATA31# E37 SDATA22# NC Pin F10H28 NC Pin H30 H32 H34 NC Pin H10 H12NC Pin VID4 J31 J33 SDATA19# J35 J37 SDATA29#S31 NC Pin S33 Key Pin Q31 NC Pin Q33 SDATA24# Q35 SDATA17# Q37 SDATA16#S35 SDATA15# S37 U31 NC Pin U33NC Pin W31 W33 FID0 FID1FID2 FID3 NC Pin Key Pin Y31 Y33 Y35 Y37 SDATA12#AE31 NC Pin AE33 NC Pin AD30 AD32NC Pin AF10 AF12 AF20NC Pin AJ11 AJ13 Analog AJ15 AJ17 AJ19 AJ21 AH30 FSBSense1 AH32AJ27 NC Pin AJ29 NC Pin AK10NC Pin AM10 AL25 NC Pin AL27 AL29NC Pin Name AN11 NC Pin AN13Detailed Pin Descriptions COREFB# Pins Sysclk PinsPins Connect PinFID30 Clock Multiplier Encodings FID30 PinsFLUSH# Pin Front-Side Bus Sense Truth TableIGNNE# Pin INIT# PinK7CLKOUT# Pins Jtag PinsKey Pins NC PinsScan Pins SADDOUT10# PinsThermdc Pins VID40 PinsVID40 Code to Voltage Definition ZN and ZP PinsVrefsys Pin VID40Standard AMD Athlon XP Processor Model 10 Products Ordering InformationPreliminary Information Constants and Variables for the Ideal Diode Equation Ideal Diode EquationTemperature Offset Correction --- I-- high------  Preliminary Information Appendix B Signals and BitsData Terminology Abbreviations and Acronyms AbbreviationsAbbreviation Meaning API AcronymsNMI VGA Related Publications Preliminary Information

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