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AMD ATHLON 8 Datasheet

AMD ATHLON 8 Datasheet

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Preliminary Information
AMD Athlon XP
TM
Processor Model 8
Data Sheet
Publication # 25175 Rev. H
Issue Date: March 2003

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Summary of Contents for AMD ATHLON 8

  • Page 1 Preliminary Information AMD Athlon XP Processor Model 8 Data Sheet Publication # 25175 Rev. H Issue Date: March 2003...
  • Page 2 AMD reserves the right to discontinue or make changes to its products at any time without notice. Trademarks AMD, the AMD Arrow logo, AMD Athlon, AMD Duron, and combinations thereof, QuantiSpeed, and 3DNow! are trademarks of Advanced Micro Devices, Inc. HyperTransport is a licensed trademark of the HyperTransport Technology Consortium.

  • Page 3: Table Of Contents

    Push-Pull (PP) Drivers ....... . 6 AMD Athlon™ System Bus Signals ..... . 6 Power Management States .
  • Page 4 AMD Pin ........
  • Page 5 Ordering Information....... . . 81 Standard AMD Athlon XP Processor Model 8 Products ..81 Appendix A Thermal Diode Calculations .
  • Page 6 Preliminary Information AMD Athlon™ XP Processor Model 8 Data Sheet 25175H—March 2003 Table of Contents...

  • Page 7: List Of Figures

    Figure 12. General ATE Open-Drain Test Circuit....41 Figure 13. Signal Relationship Requirements During Power-Up Figure 14. AMD Athlon XP Processor Model 8 Part Number Figure 15. AMD Athlon XP Processor Model 8 Part Number Figure 16.
  • Page 8 Preliminary Information AMD Athlon™ XP Processor Model 8 Data Sheet 25175H—March 2003 List of Figures...

  • Page 9: List Of Tables

    SYSCLK and SYSCLK# AC Characteristics ....28 AMD Athlon System Bus AC Characteristics ....29 Interface Signal Groupings .
  • Page 10 AMD Athlon™ XP Processor Model 8 Data Sheet Table 28. Table 29. Table 30. Table 31. Table 32. Preliminary Information VID[4:0] Code to Voltage Definition ..... 80 Constants and Variables for the Ideal Diode Equation .

  • Page 11: Revision History

    In Chapter 7, revised Table 6, “SYSCLK and SYSCLK# AC Characteristics,” on page 28. In Chapter 10, renamed Table 21, “Part Number 27291 OPGA Package Dimensions for AMD Athlon™ XP Processors Model 8 with a CPUID of 680,” on page 50, renamed Table 22, March 2003 “Part Number 27291 OPGA Package Dimensions for AMD Athlon™...
  • Page 12 In Chapter 10, revised Table 21, “Part Number 27291 OPGA Package Dimensions for AMD Athlon™ XP Processors Model 8 with a CPUID of 680,” on page 50 and Table 22, “Part Number 27291 OPGA Package Dimensions for AMD Athlon™ XP Processors Model 8 with a CPUID of 681,”...

  • Page 13: Overview

    The AMD Athlon™ XP processor model 8 with QuantiSpeed™ architecture powers the next generation in computing platforms, delivering extreme performance for Windows The AMD Athlon™ XP processor model 8, based on leading- edge 0.13 micron technology, integrates the innovative design and manufacturing expertise of AMD to deliver improved...

  • Page 14: Quantispeed™ Architecture Summary

    AMD Athlon™ XP Processor Model 8 Data Sheet The features of the AMD Athlon XP processor model 8 are QuantiSpeed™ architecture, a high-performance full-speed cache, an advanced 333 front-side Bus (FSB) with a 2.7-Gigabyte per second system bus, or an advanced 266 FSB with a 2.1-Gigabyte per second system bus, and 3DNow!™...
  • Page 15 AMD Athlon System Bus System Controller (Northbridge) Peripheral Bus Controller (Southbridge) Figure 1. Typical AMD Athlon™ XP Processor Model 8 System Block Diagram Chapter 1 Preliminary Information AMD Athlon™ XP Processor Model 8 Data Sheet AGP Bus Memory Bus PCI Bus...
  • Page 16 Preliminary Information AMD Athlon™ XP Processor Model 8 Data Sheet 25175H—March 2003 Overview Chapter 1...

  • Page 17: Interface Signals

    This section describes the interface signals utilized by the AMD Athlon™ XP processor model 8. Overview The AMD Athlon™ system bus architecture is designed to deliver excellent data movement bandwidth for next- generation x86 platforms as well as the high-performance required by enterprise-class application software.

  • Page 18: Push-Pull (Pp) Drivers

    AMD Athlon™ XP Processor Model 8 Data Sheet Push-Pull (PP) Drivers The AMD Athlon XP processor model 8 supports push-pull (PP) drivers. The system logic configures the processor with the configuration parameter called SysPushPull (1=PP). The impedance of the PP drivers is set to match the impedance of the motherboard by two external resistors connected to the ZN and ZP pins.

  • Page 19: Logic Symbol Diagram

    Power CLKFWDRST Management CONNECT STPCLK# Initialization RESET# Figure 2. Logic Symbol Diagram Chapter 3 Preliminary Information AMD Athlon™ XP Processor Model 8 Data Sheet Clock SYSCLK SYSCLK# FSB_SENSE[1:0] AMD Athlon™ XP Processor Model 8 Logic Symbol Diagram VID[4:0] Voltage COREFB...

  • Page 20: Advanced 266 Fsb Amd Athlon Xp Processor Model

    Preliminary Information AMD Athlon™ XP Processor Model 8 Data Sheet 25175H—March 2003 Logic Symbol Diagram Chapter 3...

  • Page 21: Power Management

    2) During transitions between the Halt state and the C2 Stop Grant state 3) During transitions between the C2 Stop Grant state and the Halt state 4) C0 Working state Figure 3. AMD Athlon™ XP Processor Model 8 Power Management States Chapter 4 Preliminary Information AMD Athlon™...

  • Page 22: Working State

    Stop Grant special bus cycle on the AMD Athlon system bus. The processor is not in a low-power state at this time, because the AMD Athlon system bus is still connected. After the Northbridge disconnects the AMD Athlon...
  • Page 23 , t h e p ro c e s s o r i n i t i a t e s a c o n n e c t o f t h e AMD Athlon system bus if it is disconnected. After the...

  • Page 24: Probe State

    Probe State The Probe state is entered when the Northbridge connects the AMD Athlon system bus to probe the processor (for example, to snoop the processor caches) when the processor is in the Halt or Stop Grant state. When in the Probe state, the processor responds to a probe cycle in the same manner as when it is in the Working state.
  • Page 25 The system is required to assert the CONNECT signal before returning the C-bit for the connect special cycle (assuming CONNECT has been deasserted). For more information, see the AMD Athlon™ System Bus Specification, order# 21902 for the definition of the C-bit and the Connect special cycle.
  • Page 26 CONNECT PROCRDY CLKFWDRST PCI Bus Figure 4. AMD Athlon™ System Bus Disconnect Sequence in the Stop Grant State An example of the AMD Athlon system bus disconnect sequence is as follows: 1. The peripheral controller (Southbridge) asserts STPCLK# to place the processor in the Stop Grant state.
  • Page 27 25175H—March 2003 Figure 5 shows the signal sequence of events that takes the processor out of the Stop Grant state, connects the processor to the AMD Athlon system bus, and puts the processor into the Working state. STPCLK# PROCRDY CONNECT CLKFWDRST Figure 5.

  • Page 28: Connect State Diagram

    AMD Athlon™ XP Processor Model 8 Data Sheet Connect State Figure 6 below and Figure 7 on page 17 show the Northbridge Diagram and processor connect state diagrams, respectively. Disconnect Pending Disconnect Condition 1 A disconnect is requested and probes are still pending.
  • Page 29 Forward clocks start three SYSCLK periods after CLKFWDRST is deasserted. Figure 7. Processor Connect State Diagram Chapter 4 Preliminary Information AMD Athlon™ XP Processor Model 8 Data Sheet Connect Pending 2 Pending 1 Disconnect A CLKFWDRST is asserted by the Northbridge.

  • Page 30: Clock Control

    (address C001_001Bh) that determines the internal clock divisor when the AMD Athlon system bus is disconnected. Refer to the AMD Athlon™ and AMD Duron™ Processors BIOS, Software, and Debug Developers Guide, order# 21656, for more details on the CLK_Ctl register.

  • Page 31: Cpuid Support

    25175H—March 2003 CPUID Support AMD Athlon™ XP processor model 8 version and feature set recognition can be performed through the use of the CPUID instruction, that provides complete information about the processor—vendor, type, name, etc., and its capabilities. Software can make use of this information to accurately tune the system for maximum performance and benefit to users.
  • Page 32 Preliminary Information AMD Athlon™ XP Processor Model 8 Data Sheet 25175H—March 2003 CPUID Support Chapter 5...

  • Page 33: Advanced 266 Front-Side Bus Amd Athlon™ Xp Processor Model 8 Specifications

    A dva n c e d 2 6 6 F S B AMD Athlon XP processors model 8 in Table 1 on page 22 and Table 2 on page 23.
  • Page 34 3. These currents occur when the AMD Athlon™ system bus is disconnected and has a low power ratio of 1/8 for Stop Grant disconnect and a low power ratio of 1/8 Halt disconnect applied to the core clock grid of the processor as dictated by a value of 6003_1223h programmed into the Clock Control (CLK_Ctl) MSR.
  • Page 35 3. These currents occur when the AMD Athlon™ system bus is disconnected and has a low power ratio of 1/8 for Stop Grant disconnect and a low power ratio of 1/8 Halt disconnect applied to the core clock grid of the processor as dictated by a value of 2003_1223h programmed into the Clock Control (CLK_Ctl) MSR.

  • Page 36: Sysclk And Sysclk# Ac Characteristics

    1. The AMD Athlon™ system bus operates at twice this clock frequency. 2. Circuitry driving the AMD Athlon system bus clock inputs must exhibit a suitably low closed-loop jitter bandwidth to allow the PLL to track the jitter. The –20dB attenuation point, as measured into a 20 3.

  • Page 37: Advanced 266 Fsb Amd Athlon System Bus Ac Characteristics

    Advanced 266 FSB AMD Athlon™ System Bus AC Characteristics The AC characteristics for the AMD Athlon system bus of this processor are shown in Table 4. The parameters are grouped based on the source or destination of the signals involved.
  • Page 38 Preliminary Information AMD Athlon™ XP Processor Model 8 Data Sheet 25175H—March 2003 Advanced 266 Front-Side Bus AMD Athlon™ XP Processor Model 8 Specifications Chapter 6...

  • Page 39: Advanced 333 Front-Side Bus Amd Athlon™ Xp Processor Model 8 Specifications

    3. These currents occur when the AMD Athlon™ system bus is disconnected and has a low power ratio of 1/8 for Stop Grant disconnect and a low power ratio of 1/8 Halt disconnect applied to the core clock grid of the processor as dictated by a value of 2003_1223h programmed into the Clock Control (CLK_Ctl) MSR.

  • Page 40: Sysclk And Sysclk# Ac Characteristics

    1. The AMD Athlon™ system bus operates at twice this clock frequency. 2. Circuitry driving the AMD Athlon system bus clock inputs must exhibit a suitably low closed-loop jitter bandwidth to allow the PLL to track the jitter. The –20dB attenuation point, as measured into a 20 3.

  • Page 41: Advanced 333 Fsb Amd Athlon System Bus Ac Characteristics

    Advanced 333 FSB AMD Athlon™ System Bus AC Characteristics The AC characteristics of the AMD Athlon system bus of this processor are shown in Table 7. The parameters are grouped based on the source or destination of the signals involved.

  • Page 42: Amd Athlon™ Xp Processor Model 8 Data Sheet 25175H—March

    Preliminary Information AMD Athlon™ XP Processor Model 8 Data Sheet 25175H—March 2003 Advanced 333 Front-Side Bus AMD Athlon™ XP Processor Model 8 Specifications Chapter 7...

  • Page 43: Electrical Data

    25175H—March 2003 Electrical Data This chapter describes the electrical characteristics that apply to all desktop AMD Athlon™ XP processors model 8. Conventions The conventions used in this chapter are as follows: Current specified as being sourced by the processor is negative.
  • Page 44 AMD Athlon™ XP Processor Model 8 Data Sheet Table 8. Interface Signal Groupings (continued) Signal Group VID[4:0], VCCA, V Power CC_CORE RESET#, INTR, NMI, SMI#, INIT#, A20M#, FERR, IGNNE#, Southbridge STPCLK#, FLUSH# SYSCLK, SYSCLK# (Tied to CLKIN/CLKIN# and RSTCLK/RSTCLK#), System Clocks...

  • Page 45: Voltage Identification (Vid[4:0])

    1. Minimum and Maximum voltages are absolute. No transients below minimum nor above maximum voltages are permitted. 2. Measured at 2.5 V. Chapter 8 Preliminary Information AMD Athlon™ XP Processor Model 8 Data Sheet VID[4:0] DC Characteristics Description Output Current Low Output High Voltage are not pulled above 5.25 V, which is 5.0 V + 5%.

  • Page 46: Decoupling

    AMD Athlon™ XP Processor Model 8 Data Sheet Decoupling See the AMD Athlon™ Processor-Based Motherboard Design Guide, order# 24363, or contact your local AMD office for information about the decoupling required on the motherboard for use with the AMD Athlon™ XP processor model 8.
  • Page 47 DC tolerance thresholds. CC_CORE_AC_MAX CC_CORE_DC_MAX CC_CORE_NOM CC_CORE_DC_MIN CC_CORE_AC_MIN CORE_MAX CORE_MIN Figure 10. V Voltage Waveform CC_CORE Chapter 8 Preliminary Information AMD Athlon™ XP Processor Model 8 Data Sheet max_AC MAX_AC MIN_AC dI /dt Electrical Data CC_CORE (negative AC min_AC (positive AC transient...

  • Page 48: Absolute Ratings

    AMD Athlon™ XP Processor Model 8 Data Sheet Absolute Ratings The AMD Athlon XP processor model 8 should not be subjected to conditions exceeding the absolute ratings, as such conditions can adversely affect long-term reliability or result in functional damage.

  • Page 49: Sysclk And Sysclk# Dc Characteristics

    SYSCLK connects to CLKIN/RSTCLK. SYSCLK# connects to CLKIN#/RSTCLK#. Figure 11 shows the DC characteristics of the SYSCLK and SYSCLK# signals. Figure 11. SYSCLK and SYSCLK# Differential Clock Signals Chapter 8 Preliminary Information AMD Athlon™ XP Processor Model 8 Data Sheet Description CC_CORE CROSS Threshold-DC Electrical Data Units –1...

  • Page 50: Amd Athlon System Bus Dc Characteristics

    AMD Athlon™ XP Processor Model 8 Data Sheet 8.10 AMD Athlon™ System Bus DC Characteristics Table 15 shows the DC characteristics of the AMD Athlon system bus used by the AMD Athlon XP processor model 8. Table 15. AMD Athlon™ System Bus DC Characteristics Symbol Parameter...

  • Page 51: General Ac And Dc Characteristics

    25175H—March 2003 8.11 General AC and DC Characteristics Table 16 shows the AMD Athlon XP processor model 8 AC and DC characteristics of the Southbridge, JTAG, test, and miscel- laneous pins. Table 16. General AC and DC Characteristics Symbol Parameter Description...
  • Page 52 AMD Athlon™ XP Processor Model 8 Data Sheet Table 16. General AC and DC Characteristics (continued) Symbol Parameter Description Input Time to Acquire Input Time to Reacquire Signal Rise Time RISE Signal Fall Time FALL Pin Capacitance Time to data valid...

  • Page 53: Open-Drain Test Circuit

    Refer to Table 16, “General AC and DC Characteristics,” on page 39 for timing requirements. Figure 12. General ATE Open-Drain Test Circuit Chapter 8 Preliminary Information AMD Athlon™ XP Processor Model 8 Data Sheet Termination Open-Drain Pin = Output Current Notes: 1.

  • Page 54: Thermal Diode Characteristics

    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 µA and 100 µA. AMD 3. Not 100% tested. Specified by design and limited characterization.

  • Page 55: Thermal Protection Characterization

    Thermal protection circuitry reference designs and thermal solution guidelines are found in the following documents: AMD Athlon™ Processor-Based Motherboard Design Guide, order# 24363 AMD Thermal, Mechanical, and Chassis Cooling Design Guide, order# 23794 See http://www.amd.com for more information about thermal solutions.

  • Page 56: Apic Pins Ac And Dc Characteristics

    2. The thermal diode is capable of responding to thermal events of 40°C/s or faster. 3. The AMD Athlon™ XP processor model 8 provides a thermal diode for measuring die temperature of the processor. The processor relies on thermal circuitry on the motherboard to turn off the regulated core voltage to the processor in response to a thermal shutdown event.

  • Page 57: Signal And Power-Up Requirements

    25175H—March 2003 Signal and Power-Up Requirements The AMD Athlon™ XP processor model 8 is designed to provide functional operation if the voltage and temperature parameters are within the limits of normal operating ranges. Power-Up Requirements Signal Sequence and Figure 13 shows the relationship between key signals in the Timing Description system during a power-up sequence.
  • Page 58 1. RESET# must be asserted before PWROK is asserted. The AMD Athlon XP processor model 8 does not set the correct clock multiplier if PWROK is asserted prior to a RESET# assertion. It is recommended that RESET# be asserted at least 10 nanoseconds prior to the assertion of PWROK.
  • Page 59 8. The FID[3:0] signals become valid within 100 ns after RESET# is asserted. Refer to the AMD Athlon™ Processor- Based Motherboard Design Guide, order# 24363, for the specific implementation and additional circuitry required.

  • Page 60: Clock Multiplier Selection (Fid[3:0])

    (SIP). The chipset then sends the SIP information to the processor for configuration of the AMD Athlon system bus for the clock multiplier that determines the processor frequency indicated by the FID[3:0] code. The SIP is sent to the processor using the SIP protocol.

  • Page 61: Mechanical Data

    25175H—March 2003 Mechanical Data The AMD Athlon™ XP processor model 8 connects to the motherboard through a Pin Grid Array (PGA) socket named Socket A. This processor utilizes the organic pin grid array (OPGA) package type described in this chapter. For more information, see the AMD Athlon™...

  • Page 62: Part Number 27291 Opga Package Dimensions For

    Part Number 27291 OPGA Package Dimensions for AMD Athlon™ XP Processors Model 8 with a CPUID of 680 For AMD Athlon XP processors model 8 with a CPUID of 680, Table 21 shows the 27291 OPGA package dimensions in millimeters assigned to the letters and symbols used in the 27291 package diagram, Figure 14 on page 52.

  • Page 63: Part Number 27291 Opga Package Dimensions For

    Part Number 27291 OPGA Package Dimensions for AMD Athlon™ XP Processors Model 8 with a CPUID of 681 For AMD Athlon XP processors model 8 with a CPUID of 681, Table 22 shows the 27291 OPGA package dimensions in millimeters assigned to the letters and symbols used in the 27291 package diagram, Figure 14 on page 52.
  • Page 64 Preliminary Information AMD Athlon™ XP Processor Model 8 Data Sheet 25175H—March 2003 Figure 14. AMD Athlon™ XP Processor Model 8 Part Number 27291 OPGA Package Mechanical Data Chapter 10...

  • Page 65: Part Number 27648 Opga Package Dimensions For

    Part Number 27648 OPGA Package Dimensions for AMD Athlon™ XP Processors Model 8 with a CPUID of 681 For AMD Athlon XP processors model 8 with a CPUID of 681, Table 23 shows the part number 27648 OPGA package dimensions in millimeters assigned to the letters and symbols used in the 27648 package diagram, Figure 15 on page 54.
  • Page 66 Preliminary Information AMD Athlon™ XP Processor Model 8 Data Sheet 25175H—March 2003 Figure 15. AMD Athlon™ XP Processor Model 8 Part Number 27648 OPGA Package Mechanical Data Chapter 10...

  • Page 67: Pin Descriptions

    25175H—March 2003 Pin Descriptions This chapter includes pin diagrams of the organic pin grid array (OPGA) for the AMD Athlon™ XP processor model 8, a listing of pin name abbreviations, and a cross-referenced listing of pin locations to signal names.
  • Page 68 Preliminary Information AMD Athlon™ XP Processor Model 8 Data Sheet 25175H—March 2003 Pin Descriptions Chapter 11...
  • Page 69 Preliminary Information AMD Athlon™ XP Processor Model 8 Data Sheet 25175H—March 2003 Chapter 11 Pin Descriptions...
  • Page 70 AMD Athlon™ XP Processor Model 8 Data Sheet Table 24. Pin Name Abbreviations Abbreviation Full Name A20M# ANLOG ANALOG CLKFR CLKFWDRST CLKIN CLKIN# CNNCT CONNECT COREFB COREFB# CPR# CPU_PRESENCE# DBRDY DBREQ# FERR FID[0] FID[1] FID[2] FID[3] FLUSH# FSB0 FSB_Sense[0] FSB1...
  • Page 71 25175H—March 2003 Table 24. Pin Name Abbreviations (continued) Abbreviation Full Name Chapter 11 Preliminary Information AMD Athlon™ XP Processor Model 8 Data Sheet Table 24. Pin Name Abbreviations (continued) Abbreviation AA31 AC31 AD30 AE31 PICD#0 PICD#1 PLBYP# AF10 PLBYC AF28...
  • Page 72 AMD Athlon™ XP Processor Model 8 Data Sheet Table 24. Pin Name Abbreviations (continued) Abbreviation Full Name SAI#5 SADDIN[5]# SAI#6 SADDIN[6]# SAI#7 SADDIN[7]# SAI#8 SADDIN[8]# SAI#9 SADDIN[9]# SAI#10 SADDIN[10]# SAI#11 SADDIN[11]# SAI#12 SADDIN[12]# SAI#13 SADDIN[13]# SAI#14 SADDIN[14]# SAIC# SADDINCLK# SAO#0...
  • Page 73 SDIC#2 SDATAINCLK[2]# SDIC#3 SDATAINCLK[3]# SDINV# SDATAINVALID# SDOC#0 SDATAOUTCLK[0]# SDOC#1 SDATAOUTCLK[1]# Chapter 11 Preliminary Information AMD Athlon™ XP Processor Model 8 Data Sheet Table 24. Pin Name Abbreviations (continued) Abbreviation SDOC#2 SDOC#3 SDOV# SFILLV# STPC# THDA THDC AN33 AE35 Pin Descriptions...
  • Page 74 AMD Athlon™ XP Processor Model 8 Data Sheet Table 24. Pin Name Abbreviations (continued) Abbreviation Full Name CC_CORE CC_CORE CC_CORE CC_CORE CC_CORE CC_CORE CC_CORE CC_CORE CC_CORE CC_CORE CC_CORE CC_CORE CC_CORE CC_CORE CC_CORE CC_CORE CC_CORE CC_CORE CC_CORE CC_CORE CC_CORE CC_CORE CC_CORE...
  • Page 75 CC_CORE CC_CORE CC_CORE VCCA VID[0] VID[1] VID[2] VID[3] VID[4] VREF_S VREF_SYS Chapter 11 Preliminary Information AMD Athlon™ XP Processor Model 8 Data Sheet Table 24. Pin Name Abbreviations (continued) Abbreviation AK34 AK36 AM10 AM14 AM18 AM22 AM26 AM22 AM26 AM30...
  • Page 76 AMD Athlon™ XP Processor Model 8 Data Sheet Table 24. Pin Name Abbreviations (continued) Abbreviation Full Name Preliminary Information Table 24. Pin Name Abbreviations (continued) Abbreviation AD32 AD34 AD36 AF12 AF16 AH12 AH16 AH20 AH24 AH28 AH32 AH34 Pin Descriptions 25175H—March 2003...

  • Page 77: Pin List

    “O” indicates open-drain mode that allows devices to share the pin. Note: The AMD Athlon processor supports push-pull drivers. For The “P” (Port) column indicates if this signal is an input (I), output (O), or bidirectional (B) signal. The “R” (Reference)
  • Page 78 AMD Athlon™ XP Processor Model 8 Data Sheet Table 25. Cross-Reference by Pin Location Name Description No Pin page 78 SADDOUT[12]# SADDOUT[5]# SADDOUT[3]# SDATA[55]# SDATA[61]# SDATA[53]# SDATA[63]# SDATA[62]# NC Pin page 78 SDATA[57]# SDATA[39]# SDATA[35]# SDATA[34]# SDATA[44]# NC Pin page 78...
  • Page 79 SDATA[48]# SDATA[58]# SDATA[36]# SDATA[46]# NC Pin page 78 SDATAINCLK[2]# SDATA[33]# SDATA[32]# Chapter 11 Preliminary Information AMD Athlon™ XP Processor Model 8 Data Sheet (continued) Table 25. Cross-Reference by Pin Location Name NC Pin SDATA[31]# SDATA[22]# NC Pin CC_CORE CC_CORE CC_CORE...
  • Page 80 AMD Athlon™ XP Processor Model 8 Data Sheet Table 25. Cross-Reference by Pin Location Name Description NC Pin page 78 NC Pin page 78 Key Pin page 78 Key Pin page 78 NC Pin page 78 NC Pin page 78...
  • Page 81 NC Pin page 78 SDATA[24]# SDATA[17]# SDATA[16]# CC_CORE CC_CORE CC_CORE CC_CORE Chapter 11 Preliminary Information AMD Athlon™ XP Processor Model 8 Data Sheet (continued) Table 25. Cross-Reference by Pin Location Name SCANCLK1 SCANINTEVAL SCANCLK2 THERMDA NC Pin SDATA[7]# SDATA[15]# SDATA[6]#...
  • Page 82 AMD Athlon™ XP Processor Model 8 Data Sheet Table 25. Cross-Reference by Pin Location Name Description FID[0] page 76 FID[1] page 76 VREFSYS page 80 NC Pin page 78 NC Pin page 78 SDATAINCLK[0]# SDATA[2]# SDATA[1]# CC_CORE CC_CORE CC_CORE CC_CORE...
  • Page 83 AF20 AF22 CC_CORE AF24 AF26 CC_CORE AF28 NC Pin page 78 Chapter 11 Preliminary Information AMD Athlon™ XP Processor Model 8 Data Sheet (continued) Table 25. Cross-Reference by Pin Location Name AF30 NC Pin AF32 NC Pin AF34 CC_CORE AF36...
  • Page 84 AMD Athlon™ XP Processor Model 8 Data Sheet Table 25. Cross-Reference by Pin Location Name Description AH16 AH18 CC_CORE AH20 AH22 CC_CORE AH24 AH26 CC_CORE AH28 AH30 FSB_Sense[1] page 77 AH32 AH34 AH36 IGNNE# page 77 INIT# page 77 CC_CORE...
  • Page 85 No Pin page 78 SMI# NC Pin page 78 NC Pin page 78 Chapter 11 Preliminary Information AMD Athlon™ XP Processor Model 8 Data Sheet Table 25. Cross-Reference by Pin Location Name AN11 NC Pin AN13 PLLMON1 AN15 PLLBYPASSCLK AN17...

  • Page 86: Detailed Pin Descriptions

    20-bit 8086. AMD Pin AMD Socket A processors do not implement a pin at location AH6. All Socket A designs must have a top plate or cover that blocks this pin location. When the cover plate blocks this location, a non-AMD part (e.g., PGA370) does not fit into the...

  • Page 87: Connect Pin

    FID[3] (Y3), FID[2] (Y1), FID[1] (W3), and FID[0] (W1) are the 4-bit processor clock-to-SYSCLK ratio. Table 26 on page 76 shows the encodings of the clock multipliers on FID[3:0]. Chapter 11 Preliminary Information AMD Athlon™ XP Processor Model 8 Data Sheet with a pullup resistor. CC_CORE Pin Descriptions...
  • Page 88 SIP configuration for all ratios of 12.5x or greater to be the same. FID combinations and selects a Halt disconnect divisor and a Stop Grant disconnect divisor. For more information, refer to the AMD Athlon™ and AMD Duron™ Processors BIOS, Software, and Debug Developers Guide, order# 21656.

  • Page 89: Fsb_Sense[1:0] Pins

    (FSB) setting of this processor. Proper detection of the FSB setting requires the implementation of a pull-up resistor on the motherboard. Refer to the AMD Athlon™ Processor-Based Motherboard Design Guide, order# 24363 and the technical note FSB_Sense Auto Detection Circuitry for Desktop Processors, order# TN26673 for more information.

  • Page 90: K7Clkout And K7Clkout# Pins

    AMD Athlon™ XP Processor Model 8 Data Sheet K7CLKOUT and K7CLKOUT and K7CLKOUT# are each run for two to three K7CLKOUT# Pins inches and then terminated with a resistor pair: 100 ohms to CC_CORE resistance and voltage are 50 ohms and V...

  • Page 91: Saddin[1:0]# And Saddout[1:0]# Pins

    Northbridge. For more information, see the AMD Athlon™ System Bus Specification, order# 21902. Scan Pins SCANSHIFTEN, SCANCLK1, SCANINTEVAL, and SCANCLK2 are the scan interface. This interface is AMD internal and is tied disabled with pulldown resistors to ground on the motherboard. SMI# Pin SMI# is an input that causes the processor to enter the system management mode.

  • Page 92: Vrefsys Pin

    AMD Athlon™ XP Processor Model 8 Data Sheet Table 28. VID[4:0] Code to Voltage Definition VID[4:0] 00000 00001 00010 00011 00100 00101 00111 01000 01001 01010 01011 01100 01101 01110 01111 For more information, see the “Required Circuits” chapter of the AMD Athlon™...

  • Page 93: Ordering Information

    1. Spaces are added to the number shown above for viewing clarity only. 2. This processor is available only with a 266 advanced FSB. 3. This processor is available only with a 333 advanced FSB. Figure 18. OPN Example for the AMD Athlon™ XP Processor Model 8 Chapter 12 Preliminary Information AMD Athlon™...
  • Page 94 Preliminary Information AMD Athlon™ XP Processor Model 8 Data Sheet 25175H—March 2003 Ordering Information Chapter 12...

  • Page 95: Appendix A Thermal Diode Calculations

    25175H—March 2003 Thermal Diode Calculations This section contains information about the calculations for the on-die thermal diode of the AMD Athlon™ XP processor model 8. For electrical information about this thermal diode, see Table 17, “Thermal Diode Electrical Characteristics,” on page 42.

  • Page 96: Temperature Offset Correction

    Temperature sensors that utilize series resistance cancellation can use more than two sourcing currents and are suitable to be used with the AMD thermal diode. Equation (2) is the formula for calculating the temperature of a thermal diode.
  • Page 97 Equation (4). o f f s e t Appendix A - Thermal Diode Calculations Preliminary Information AMD Athlon™ XP Processor Model 8 Data Sheet . Refer to the document, On-Die Thermal Diode f,TS ) in sensors that do not employ series f, lumped ⋅...
  • Page 98 Preliminary Information AMD Athlon™ XP Processor Model 8 Data Sheet 25175H—March 2003 Appendix A - Thermal Diode Calculations...

  • Page 99: Appendix B Conventions And Abbreviations

    These bits and signals are reserved by AMD for future implementations. When software reads registers with reserved bits, the reserved bits must be masked. When software writes such registers, it must first read the register and change only the non-reserved bits before writing back to the register.

  • Page 100: Data Terminology

    AMD Athlon™ XP Processor Model 8 Data Sheet Invalid and Don’t-Care—In timing diagrams, signal ranges that are invalid or don't-care are filled with a screen pattern. Data Terminology The following list defines data terminology: Quantities • • • Addressing—Memory is addressed as a series of bytes on eight-byte (64-bit) boundaries in which each byte can be separately enabled.

  • Page 101: Abbreviations And Acronyms

    Table 31 contains the definitions of abbreviations used in this document. Table 31. Abbreviations Abbreviation Gbyte Kbyte Mbyte Appendix B - Conventions and Abbreviations Preliminary Information AMD Athlon™ XP Processor Model 8 Data Sheet Meaning Ampere Farad Giga- Gbit Gigabit Gigabyte Gigahertz...
  • Page 102 AMD Athlon™ XP Processor Model 8 Data Sheet Table 31. Abbreviations (continued) Abbreviation Table 32 contains the definitions of acronyms used in this document. Table 32. Acronyms Abbreviation CPGA DIMM DRAM EPROM GART HSTL Preliminary Information Meaning pico- picoampere picofarad...
  • Page 103 PMSM POST SDRAM SIMD SMbus Appendix B - Conventions and Abbreviations Preliminary Information AMD Athlon™ XP Processor Model 8 Data Sheet Meaning Integrated Device Electronics Industry Standard Architecture Instructions Per Cycle Joint Electron Device Engineering Council JTAG Joint Test Action Group...
  • Page 104 AMD Athlon™ XP Processor Model 8 Data Sheet Table 32. Acronyms (continued) Abbreviation SRAM SROM Preliminary Information Meaning Serial Presence Detect Synchronous Random Access Memory Serial Read Only Memory Translation Lookaside Buffer Top of Memory Transistor Transistor Logic Virtual Address Space...

  • Page 105: Related Publications

    These documents provide helpful information about the AMD Athlon™ XP processor model 8, and can be found with o t h e r re l a t e d d o c u m e n t s a t t h e A M D We b s i t e , http://www.amd.com.
  • Page 106 Preliminary Information AMD Athlon™ XP Processor Model 8 Data Sheet 25175H—March 2003 Appendix B - Conventions and Abbreviations...

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