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AMD AXDA3200DKV4E Data Sheet - Page 93

Thermal Diode Calculations, Ideal Diode Equation

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26237C-May 2003 Preliminary Information 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

Section	Page
Table of Contents	3
List of Figures	7
List of Tables	9
Revision History	11
1 Overview	13
1.1 QuantiSpeed™ Architecture Summary	14
2 Interface Signals	17
2.1 Overview	17
2.2 Signaling Technology	17
2.3 Push-Pull (PP) Drivers	18
2.4 AMDAthlon™ System Bus Signals	18
3 Logic Symbol Diagram	19
4 Power Management	21
4.1 Power Management States	21
Working State	22
Halt State	22
Stop Grant States	22
Probe State	24
4.2 Connect and Disconnect Protocol	24
Connect Protocol	24
Connect State Diagram	28
4.3 Clock Control	30
5 CPUID Support	31
6 Advanced 333 Front-Side Bus AMDAthlon™ XP Processor Model 10 Specifications	33
6.1 Electrical and Thermal Specifications for the Advanced 333 FSB AMDAthlon™ XP Processor Model 10	33
6.2 Advanced 333 FSB AMDAthlon™ XP Processor Model 10 SYSCLK and SYSCLK# AC Characteristics	34
6.3 Advanced 333 FSB AMDAthlon™ System Bus AC Characteristics	35
6.4 Advanced 333 FSB AMDAthlon™ System Bus DC Characteristics	36
7 Advanced 400 Front-Side Bus AMDAthlon™ XP Processor Model 10 Specifications	37
7.1 Electrical and Thermal Specifications for the Advanced 400 FSB AMDAthlon™ XP Processor Model 10	37
7.2 Advanced 400 FSB AMDAthlon™ XP Processor Model 10 SYSCLK and SYSCLK# AC Characteristics	38
7.3 Advanced 400 FSB AMDAthlon™ System Bus AC Characteristics	39
7.4 Advanced 400 FSB AMDAthlon™ System Bus DC Characteristics	40
8 Electrical Data	41
8.1 Conventions	41
8.2 Interface Signal Groupings	41
8.3 Voltage Identification (VID[4:0])	42
8.4 Frequency Identification (FID[3:0])	43
8.5 VCCA AC and DC Characteristics	43
8.6 Decoupling	43
8.7 VCC_CORE Characteristics	44
8.8 Absolute Ratings	46
8.9 SYSCLK and SYSCLK# DC Characteristics	47
8.10 General AC and DC Characteristics	48
8.11 Open Drain Test Circuit	50
8.12 Thermal Diode Characteristics	51
Thermal Diode Electrical Characteristics	51
Thermal Protection Characterization	51
8.13 APIC Pins AC and DC Characteristics	53
9 Signal and PowerUp Requirements	55
9.1 PowerUp Requirements	55
Signal Sequence and Timing Description	55
Clock Multiplier Selection (FID[3:0])	58
9.2 Processor Warm Reset Requirements	58
Northbridge Reset Pins	58
10 Mechanical Data	59
10.1 Die Loading	59
10.2 AMDAthlon™ XP Processor Model 10 Part Number 27488 OPGA Package Dimensions	60
10.3 AMDAthlon™ XP Processor Model 10 Part Number 27493 OPGA Package Dimensions	62
11 Pin Descriptions	65
11.1 Pin Diagram and Pin Name Abbreviations	65
11.2 Pin List	75
11.3 Detailed Pin Descriptions	84
A20M# Pin	84
AMD Pin	84
AMDAthlon™ System Bus Pins	84
Analog Pin	84
APIC Pins, PICCLK, PICD[1:0]#	84
CLKFWDRST Pin	84
CLKIN, RSTCLK (SYSCLK) Pins	85
CONNECT Pin	85
COREFB and COREFB# Pins	85
CPU_PRESENCE# Pin	85
DBRDY and DBREQ# Pins	85
FERR Pin	85
FID[3:0] Pins	86
FSB_Sense[1:0] Pins	87
FLUSH# Pin	87
IGNNE# Pin	87
INIT# Pin	87
INTR Pin	88
JTAG Pins	88
K7CLKOUT and K7CLKOUT# Pins	88
Key Pins	88
NC Pins	88
NMI Pin	88
PGA Orientation Pins	88
PLL Bypass and Test Pins	88
PWROK Pin	88
SADDIN[1:0]# and SADDOUT[1:0]# Pins	89
Scan Pins	89
SMI# Pin	89
STPCLK# Pin	89
SYSCLK and SYSCLK#	89
THERMDA and THERMDC Pins	89
VCCA Pin	89
VID[4:0] Pins	89
VREFSYS Pin	90
ZN and ZP Pins	90
12 Ordering Information	91
Standard AMDAthlon™ XP Processor Model 10 Products	91
Thermal Diode Calculations	93
Ideal Diode Equation	93
Temperature Offset Correction	94
Conventions and Abbreviations	97
Signals and Bits	97
Data Terminology	98
Abbreviations and Acronyms	99