AMD 27493, 10, 27488 Thermal Diode Characteristics, Thermal Diode Electrical Characteristics

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Preliminary Information

26237C —May 2003

AMD Athlon™ XP Processor Model 10 Data Sheet

8.12Thermal Diode Characteristics

	The AMD Athlon XP processor model 10 provides a diode that
	can be used in conjunction with an external temperature sensor
	to determine the die temperature of the processor. The diode
	anode (THERMDA) and cathode (THERMDC) are available as
	pins on the processor, as described in “THERMDA and
	THERMDC Pins” on page 77.
	For information about thermal design for the AMD Athlon XP
	processor model 10, including layout and airflow
	considerations, see the AMD Processor Thermal, Mechanical, and
	Chassis Cooling Design Guide, order# 23794, and the cooling
	guidelines on http://www.amd.com.
Thermal Diode	Table 17 shows the AMD Athlon XP processor model 10
Electrical	characteristics of the on-die thermal diode. For information
Characteristics	about calculations for the ideal diode equation and
	temperature offset correction, see Appendix A, "Thermal
	Diode Calculations," on page 77.
	Table 17. Thermal Diode Electrical Characteristics

	Symbol		Parameter	Min	Nom	Max	Units		Notes
	Symbol		Description	Min	Nom	Max	Units		Notes
			Description

		I	Sourcing current	5		300	µA		1

	n	f, lumped	Lumped ideality	1.00000	1.00374	1.00900			2, 3, 4
	n		factor	1.00000	1.00374	1.00900			2, 3, 4
			factor

	nf, actual		Actual ideality factor		1.00261				3, 4
		RT	Series Resistance		0.93		Ω		3, 4
	Notes:
		1. The sourcing current should always be used in forward bias only.
		2. Characterized at 95°C with a forward bias current pair of 10 ∝A and 100 ∝A. AMD
		recommends using a minimum of two sourcing currents to accurately measure the
		temperature of the thermal diode.
		3. Not 100% tested. Specified by design and limited characterization.
		4. The lumped ideality factor adds the effect of the series resistance term to the actual ideality
		factor. The series resistance term indicates the resistance from the pins of the processor to the
		on-die thermal diode. The value of the lumped ideality factor depends on the sourcing current
		pair used.

Thermal Protection The following section describes parameters relating to thermal

Characterization protection. The implementation of thermal control circuitry to control processor temperature is left to the manufacturer to determine how to implement.

Chapter 8

Electrical Data

39

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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 May Revision HistoryDate Rev , revised wording in the OverviewXii 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 DiagramNorthbridge Connect Pending Disconnect Disconnect4/CDisconnect request Return internal clocks to full speed and assertClock Control Cpuid Support Preliminary Information 12.1 a MaximumMaximum Typical 68.3 W 53.7 WDuty Cycle Advanced 333 FSB Sysclk and SYSCLK# AC CharacteristicsParameter Description Minimum Maximum Clock FrequencyAdvanced 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 Characteristics76.8 W 60.4 W Maximum Typical 2100 3000+12.1 a 68.3 W 53.7 W 2200 3200+Advanced 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 CharacteristicsConventions Interface Signal GroupingsInterface Signal Groupings Electrical DataVoltage Identification VID40 VID40 DC CharacteristicsFrequency Identification FID30 Vcca AC and DC CharacteristicsFID30 DC Characteristics Vcca AC and DC CharacteristicsVcccore 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 CharacteristicsInput Time to Reacquire Signal Rise TimeSignal Fall Time Input Time to Acquire50 Ω ±3% Open-Drain Pin IOL = Output Current2 Open Drain Test CircuitThermal Diode Thermal Diode CharacteristicsCharacteristics Thermal Diode Electrical CharacteristicsSymbol 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 Location Dynamic MAX Static MAX Units Die Surface 100 Mechanical DataDie Loading Mechanical Loading453 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 AD30 Abbreviation Full Name Pin Q31 S31 U31 U37 W31 Y31 Y33AA31 AC31AL33 AE33AJ35 AG37E15 W33J35 E27F34 F24F28 F32AM14 AK34AK36 AM10V36 V30V32 V34Pin List A35 SDATA40# A37 SDATA30# Cross-Reference by Pin LocationPin Name No PinNC Pin F10 SDATA52# E11 SDATA50# E13 SDATA49# E15E29 SDATA33# E31 SDATA32# Pin Name E33 NC Pin E35 SDATA31# E37 SDATA22#J37 SDATA29# NC Pin H10 H12H28 NC Pin H30 H32 H34 NC Pin VID4 J31 J33 SDATA19# J35U31 NC Pin U33 Key Pin Q31 NC Pin Q33 SDATA24# Q35 SDATA17# Q37 SDATA16#S31 NC Pin S33 S35 SDATA15# S37Y37 SDATA12# FID0 FID1NC Pin W31 W33 FID2 FID3 NC Pin Key Pin Y31 Y33 Y35AF20 NC Pin AD30 AD32AE31 NC Pin AE33 NC Pin AF10 AF12NC Pin AK10 AH30 FSBSense1 AH32NC Pin AJ11 AJ13 Analog AJ15 AJ17 AJ19 AJ21 AJ27 NC Pin AJ29AN11 NC Pin AN13 AL25 NC Pin AL27 AL29NC Pin AM10 NC Pin NameDetailed Pin Descriptions Connect Pin Sysclk PinsCOREFB# Pins PinsFID30 Clock Multiplier Encodings FID30 PinsINIT# Pin Front-Side Bus Sense Truth TableFLUSH# Pin IGNNE# PinNC Pins Jtag PinsK7CLKOUT# Pins Key PinsVID40 Pins SADDOUT10# PinsScan Pins Thermdc PinsVID40 ZN and ZP PinsVID40 Code to Voltage Definition Vrefsys PinStandard 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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