ETC RK80530KZ012512

Intel® Pentium® III Processor with 512KB L2
Cache at 1.13GHz to 1.40GHz
Datasheet
Product Features
■
■
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■
■
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Available at 1.13, 1.26 and 1.40GHz
512KB Advanced Transfer Cache (on-die,
full speed Level 2 (L2) cache with Error
Correcting Code (ECC))
Dual Independent Bus (DIB) architecture:
Separate dedicated external System Bus and
dedicated internal high-speed cache bus
Internet Streaming SIMD Extensions for
enhanced video, sound and 3D performance
Binary compatible with applications running
on previous members of the Intel
microprocessor line
Dynamic execution micro architecture
Power Management capabilities
— System Management mode
— Multiple low-power states
■
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■
■
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Optimized for 32-bit applications running on
advanced 32-bit operating systems
Flip Chip Pin Grid Array (FC-PGA2) packaging
technology; FC-PGA2 processors deliver high
performance with improved handling protection
and socketability
Integrated high performance 16KB instruction
and 16KB data, nonblocking, level one cache
512KB Integrated Full Speed level two cache
allows for low latency on read/store operations
Quad Quadword Wide (256 bit) cache data bus
provides extremely high throughput on read/
store operations.
8-way cache associativity provides improved
cache hit rate on reads/store operations.
Error-correcting code for System Bus data
Data Prefetch Logic
The Pentium® III processor with 512KB L2 Cache is designed for high-performance workstations and
servers. It is binary compatible with previous Intel architecture processors. The Pentium® III processor
with 512KB L2 Cache provides great performance for applications running on advanced operating
systems such as Windows* 98, Windows* NT, Windows* 2000, Windows* Me and Linux. This is
achieved by integrating the best attributes of Intel processors—the dynamic execution, Dual
Independent Bus architecture plus Intel® MMX™ technology and Internet Streaming SIMD
Extensions—bringing a new level of performance for systems buyers. The Pentium® III processor with
512KB L2 Cache extends the power of the Pentium® II processor with performance headroom for
business media, communication and internet capabilities. Systems based on the Pentium® III processor
with 512KB L2 Cache also include the latest features to simplify system management and lower the
cost of ownership for large and small business environments. The Pentium® III processor with 512KB
L2 Cache offers great performance for today’s and tomorrow’s applications.
FC-PGA2 370 Package
February 2002
Order Number: 249657-003
Intel® Pentium® III Processor with 512KB L2 Cache at 1.13GHz to 1.40GHz
Information in this document is provided in connection with Intel products. No license, express or implied, by estoppel or otherwise, to any intellectual
property rights is granted by this document. Except as provided in Intel's Terms and Conditions of Sale for such products, Intel assumes no liability
whatsoever, and Intel disclaims any express or implied warranty, relating to sale and/or use of Intel products including liability or warranties relating to
fitness for a particular purpose, merchantability, or infringement of any patent, copyright or other intellectual property right. Intel products are not
intended for use in medical, life saving, or life sustaining applications.
Intel may make changes to specifications and product descriptions at any time, without notice.
Designers must not rely on the absence or characteristics of any features or instructions marked "reserved" or "undefined." Intel reserves these for
future definition and shall have no responsibility whatsoever for conflicts or incompatibilities arising from future changes to them.
The Pentium® III Processor with 512KB L2 Cache may contain design defects or errors known as errata which may cause the product to deviate from
published specifications. Current characterized errata are available on request.
Contact your local Intel sales office or your distributor to obtain the latest specifications and before placing your product order.
Copies of documents which have an ordering number and are referenced in this document, or other Intel literature may be obtained by calling 1-800548-4725 or by visiting Intel's website at http://www.intel.com.
All rights reserved. Intel, the Intel Logo and Pentium are trademarks or registered trademarks of Intel Corporation or its subsidiaries in the United
States or other countries.
Copyright © Intel Corporation, 2002
* Other names and brands may be claimed as the property of others.
2
Datasheet
Intel® Pentium® III Processor with 512KB L2 Cache at 1.13GHz to 1.40GHz
Contents
1.0
Introduction......................................................................................................................... 7
1.1
1.2
2.0
Electrical Specifications....................................................................................................11
2.1
2.2
2.3
2.4
2.5
2.6
2.7
2.8
2.9
2.10
2.11
2.12
3.0
Processor System Bus and VREF ........................................................................11
Clock Control and Low Power States..................................................................12
2.2.1 Normal State—State 1 ...........................................................................13
2.2.2 AutoHALT Powerdown State—State 2...................................................13
2.2.3 Stop-Grant State—State 3 .....................................................................14
2.2.4 HALT/Grant Snoop State—State 4 ........................................................14
2.2.5 Sleep State—State 5..............................................................................14
2.2.6 Deep Sleep State—State 6 ....................................................................15
2.2.7 Clock Control..........................................................................................15
Power and Ground Pins ......................................................................................16
2.3.1 Phase Lock Loop (PLL) Power...............................................................16
Decoupling Guidelines ........................................................................................17
2.4.1 Processor VCCCORE Decoupling............................................................17
Processor System Bus Clock and Processor Clocking .......................................17
Voltage Identification ...........................................................................................18
Processor System Bus Unused Pins...................................................................21
Processor System Bus Signal Groups ................................................................21
2.8.1 Asynchronous vs. Synchronous for System Bus Signals .......................22
2.8.2 System Bus Frequency Select Signals ..................................................23
Maximum Ratings................................................................................................24
Processor Voltage Level Specifications ..............................................................24
AGTL System Bus Specifications........................................................................29
System Bus Timing Specifications ......................................................................29
Signal Quality Specifications ............................................................................................42
3.1
3.2
3.3
Datasheet
Terminology........................................................................................................... 8
1.1.1 Package and Processor Terminology ...................................................... 8
1.1.2 Processor Naming Convention.................................................................9
Related Documents.............................................................................................10
BCLK/BCLK# & PICCLK Signal Quality
Specifications and Measurement Guidelines ......................................................42
AGTL Signal Quality Specifications and Measurement Guidelines.....................43
AGTL Signal Quality Specifications and Measurement Guidelines.....................44
3.3.1 Overshoot/Undershoot Guidelines .........................................................44
3.3.2 Overshoot/Undershoot Magnitude .........................................................45
3.3.3 Overshoot/Undershoot Pulse Duration...................................................45
3.3.4 Activity Factor .........................................................................................45
3.3.5 Reading Overshoot/Undershoot Specification Tables............................46
3.3.6 Determining if a System meets the
Overshoot/Undershoot Specifications ....................................................47
3
Intel® Pentium® III Processor with 512KB L2 Cache at 1.13GHz to 1.40GHz
3.4
4.0
Thermal Specifications and Design Considerations......................................................... 52
4.1
4.2
5.0
6.2
6.3
Mechanical Specifications................................................................................... 72
6.1.1 Mechanical Specifications for the FC-PGA2 Package ........................... 72
6.1.2 Boxed Processor Heatsink Weight......................................................... 73
Thermal Specifications........................................................................................ 74
6.2.1 Boxed Processor Cooling Requirements ............................................... 74
6.2.2 Boxed Processor Thermal Cooling Solution Clip ................................... 74
Electrical Requirements for the Boxed Pentium® III Processor with 512KB L2
Cache.................................................................................................................. 75
6.3.1 Electrical Requirements ......................................................................... 75
Processor Signal Description ........................................................................................... 77
7.1
7.2
4
FC-PGA2 Mechanical Specifications .................................................................. 54
Recommended Mechanical Keep-Out Zones ..................................................... 57
Processor Markings ............................................................................................ 58
Processor Signal Listing...................................................................................... 59
Boxed Processor Specifications....................................................................................... 71
6.1
7.0
Thermal Specifications........................................................................................ 52
4.1.1 THERMTRIP# Requirement................................................................... 52
4.1.2 Thermal Diode........................................................................................ 53
Thermal Metrology ............................................................................................. 53
Mechanical Specifications................................................................................................ 54
5.1
5.2
5.3
5.4
6.0
Non-AGTL Signal Quality Specifications and Measurement Guidelines............. 49
3.4.1 Overshoot/Undershoot Guidelines ......................................................... 49
3.4.2 Ringback Specification........................................................................... 50
3.4.3 Settling Limit Guideline .......................................................................... 50
Alphabetical Signals Reference .......................................................................... 77
Signal Summaries ............................................................................................... 85
Datasheet
Intel® Pentium® III Processor with 512KB L2 Cache at 1.13GHz to 1.40GHz
List of Figures
1
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34
Datasheet
Integrated Heat Spreader (IHS) ............................................................................ 7
AGTL Bus Topology in a Uniprocessor Configuration.........................................12
Stop Clock State Machine ...................................................................................13
PLL Filter Specification........................................................................................16
Differential/Single-Ended Clocking Example.......................................................18
VTT Power Good and Bus Select Interconnect Diagram .....................................20
BSEL[1:0] Example for a System Design............................................................23
Vcc Static & Transient Tolerance ........................................................................27
Clock Waveform ..................................................................................................37
BCLK/BCLK#, PICCLK, and TCK Generic Clock Waveform ..............................37
System Bus Valid Delay Timings ........................................................................38
System Bus Setup and Hold Timings..................................................................38
System Bus Reset and Configuration Timings....................................................39
Platform Power-On Sequence and Timings ........................................................39
Power-On Reset and Configuration Timings.......................................................40
Test Timings (TAP Connection) ..........................................................................40
Test Reset Timings .............................................................................................41
BCLK/BCLK#, PICCLK Generic Clock Waveform at the Processor Pins ...........43
Low to High AGTL Receiver Ringback Tolerance...............................................44
Maximum Acceptable AGTL Overshoot/Undershoot Waveform .........................48
Non-AGTL Overshoot/Undershoot, Settling Limit, and Ringback ......................49
Package Dimensions...........................................................................................55
FC-PGA2 IHS Flatness Specification..................................................................57
Volumetric Keep-Out ...........................................................................................57
Component Keep-Out .........................................................................................58
Top Side Processor Markings .............................................................................58
Pentium® III Processor with 512KB L2 Cache Pinout .........................................59
Conceptual Boxed Pentium® III Processor with 512KB L2 Cache for the PGA370
Socket .................................................................................................................71
Comparison between FC-PGA and FC-PGA2 package......................................72
Side View of Space Requirements for the Boxed Processor ..............................73
Dimensions of Mechanical Step Feature in Heatsink Base.................................73
Thermal Airspace Requirement for all Boxed Pentium® III Processor with 512KB
L2 Cache Fan Heatsink in the PGA370 Socket ..................................................74
Boxed Processor Fan Heatsink Power Cable Connector Description.................75
Motherboard Power Header Placement
Relative to the Boxed Pentium® III Processor with 512KB L2 Cache .................76
5
Intel® Pentium® III Processor with 512KB L2 Cache at 1.13GHz to 1.40GHz
List of Tables
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
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34
35
36
37
38
39
40
41
42
43
6
Processor Identification......................................................................................... 9
System Bus Clock in Deep Sleep Mode ............................................................. 15
Voltage Identification Definition ......................................................................... 19
System Bus Signal Groups ................................................................................. 22
Frequency Select Truth Table for BSEL[1:0] ...................................................... 23
Absolute Maximum Ratings ................................................................................ 24
Voltage and Current Specifications .................................................................... 25
Power Supply Current Slew Rate (dIcccore/dt) .................................................... 26
Vcc Static & Transient Tolerance ....................................................................... 27
AGTL Signal Group Levels Specifications ......................................................... 28
Non-AGTL Signal Group Levels Specifications .................................................. 28
3.3 Volt CMOS Output Signal Group DC Specifications ..................................... 29
Processor AGTL Bus Specifications .................................................................. 29
System Bus Timing Specifications (Single-Ended Clock) ................................... 31
System Bus Timing Specifications (Differential Clock) ....................................... 32
System Bus Timing Specifications (AGTL Signal Group) ................................... 32
System Bus Timing Specifications (CMOS Signal Group) .................................. 33
System Bus Timing Specifications (Reset Conditions) ...................................... 34
System Bus Timing Specifications (APIC Clock and APIC I/O) .......................... 34
System Bus Timing Specifications (TAP Connection) ........................................ 35
Platform Power-On Timings ................................................................................ 36
BCLK (Single-Ended Clock Mode) Signal Quality
Specifications for Simulation at the Processor Pins............................................ 42
BCLK/BCLK# (Differential Clock Mode) and PICCLK
Signal Quality Specifications for Simulation at the Processor Pins..................... 42
AGTL Signal Groups Ringback Tolerance Specifications at the Processor Pins 43
Example Platform Information............................................................................. 46
133 MHz AGTL Signal Group Overshoot/Undershoot Tolerance ....................... 48
33 MHz CMOS Signal Group Overshoot/Undershoot Tolerance........................ 50
Signal Ringback Specifications for Non-AGTL
Signal Simulation at the Processor Pins ............................................................ 50
Pentium® III Processor with 512KB L2 Cache Thermal Design Power............... 52
THERMTRIP# Time Requirement ...................................................................... 52
Thermal Diode Parameters ................................................................................. 53
Thermal Diode Interface...................................................................................... 53
Pentium® III Processor with 512KB L2 Cache Package Dimensions ................. 56
Processor Case Loading Parameters ................................................................. 56
Signal Listing in Order by Signal Name ............................................................. 60
Signal Listing in Order by Pin Number ............................................................... 66
Boxed Processor Fan Heatsink Spatial Dimensions........................................... 73
Fan Heatsink Power and Signal Specifications................................................... 75
Signal Description .............................................................................................. 77
Output Signals ................................................................................................... 85
Input Signals ....................................................................................................... 85
Input/Output Signals (Single Driver) ................................................................... 87
Input/Output Signals (Multiple Driver) ................................................................. 87
Datasheet
Intel® Pentium® III Processor with 512KB L2 Cache at 1.13GHz to 1.40GHz
1.0
Introduction
The Intel® Pentium® III processor with 512KB L2 Cache for the PGA370 socket is the next
member of the P6 family, in the Intel IA-32 processor line and hereafter may be referred to as
simply “the processor”. The Intel® Pentium® III processor with 512KB L2 Cache will continue in
the package technology called flip-chip pin grid array but will contain a Integrated Heat Spreader
(IHS) (see Figure 1). The flip-chip with IHS package will be labeled as FC-PGA2 and will utilize
the same 370-pin zero insertion force socket (PGA370). Thermal solutions contact the IHS directly
for the FC-PGA2 package and not to the bare-die as with the FC-PGA attachment.
The Intel® Pentium® III processor with 512KB L2 Cache, like its predecessors in the P6 family of
processors, implements a Dynamic Execution microarchitecture—a unique combination of
multiple branch prediction, data flow analysis, and speculative execution. This enables these
processors to deliver higher performance than the Intel® Pentium® processor, while maintaining
binary compatibility with all previous Intel architecture processors. The processor also executes
Intel® MMXTM technology instructions for enhanced media and communication performance just
as its predecessor, the Intel® Pentium® III processor (CPUID = 068xh). Additionally, the Intel®
Pentium® III processor with 512KB L2 Cache executes Streaming SIMD (single-instruction,
multiple data) Extensions for enhanced floating point and 3-D application performance. Data
Prefetch Logic adds functionality that anticipates the data needed by the application and pre-loads
it into the Advanced Transfer Cache, further increasing processor and application performance.
The processor utilizes multiple low-power states such as Sleep, and Deep Sleep to conserve power
during idle times.
The processor includes an integrated on-die 512KB 8-way set associative level-two (L2) cache.
The L2 cache implements the Advanced Transfer Cache architecture with a 256-bit wide bus. The
processor also includes a 16 KB level one (L1) instruction cache and 16 KB L1 data cache. These
cache arrays run at the full speed of the processor core. The Intel® Pentium® III processor with
512KB L2 Cache for the PGA370 socket has a dedicated L2 cache bus, thus maintaining the dual
independent bus architecture to deliver high bus bandwidth and performance. Memory is cacheable
for 64 GB of addressable memory space, allowing significant headroom for desktop systems. Refer
to the Specification Update document for this processor to determine the cacheability and cache
configuration options for a specific processor. Please contact your nearest Intel Sales
Representative for the latest Processor Specification Update.
Figure 1. Integrated Heat Spreader (IHS)
FC-PGA2 w/IHS
FC-PGA
The Intel® Pentium® III processor with 512KB L2 Cache will support a lower voltage differential
and single-ended clocking for the system bus. The Intel® Pentium® III processor with 512KB L2
Cache will not function in a previous generation platform due to incompatible system bus signal
levels and clock type. Care must be taken to ensure the correct processors are installed in the
correct PGA370 socket platforms.
Datasheet
7
Intel® Pentium® III Processor with 512KB L2 Cache at 1.13GHz to 1.40GHz
1.1
Terminology
In this document, a ‘#’ symbol after a signal name refers to an active low signal. This means that a
signal is in the active state (based on the name of the signal) when driven to a low level. For
example, when FLUSH# is low, a flush has been requested. When NMI is high, a nonmaskable
interrupt has occurred. In the case of signals where the name does not imply an active state but
describes part of a binary sequence (such as address or data), the ‘#’ symbol implies that the signal
is inverted. For example, D[3:0] = ‘HLHL’ refers to a hex ‘A’, and D[3:0]# = ‘LHLH’ also refers to
a hex ‘A’ (H= High logic level, L= Low logic level).
The term “system bus” refers to the interface between the processor, system core logic (a.k.a. the
chipset components), and other bus agents.
1.1.1
Package and Processor Terminology
The following terms are used often in this document and are explained here for clarification:
• Intel® Pentium® III processor with 512KB L2 Cache - The entire product including all
internal components.
• PGA370 socket - 370-pin Zero Insertion Force (ZIF) socket which a FC-PGA packaged
processor plugs into.
• FC-PGA - Flip Chip Pin Grid Array. The package technology used on Intel® Pentium® III
processor (CPUID = 068xh) for the PGA370 socket. The FC-PGA package has the processor
die exposed.
• FC-PGA2 - Flip Chip Pin Grid Array 2. The package technology used on the Intel®
Pentium® III processor with 512KB L2 Cache for the PGA370 socket. The FC-PGA2 package
contains an Integrated Heat Spreader which covers the processor die.
• Advanced Transfer Cache (ATC) - L2 cache architecture used on the Intel® Pentium® III
processors. ATC consists of microarchitectural improvements that provide a higher data
bandwidth interface into the processor core that is completely scaleable with the processor
core frequency.
• Keep-out zone - The area on or near a FC-PGA2 packaged processor that system designs can
not utilize.
• Keep-in zone - The area of a FC-PGA2 packaged processor that thermal solutions may utilize.
• Processor - For this document, the term processor is the generic form of the Intel® Pentium®
III processor with 512KB L2 Cache for the PGA370 socket in the FC-PGA2 package.
• Processor core - The processor’s execution engine.
• Integrated Heat Spreader (IHS) - The Integrated Heat Spreader (IHS) is a metal cover on the
die and it is an integral part of the CPU. The IHS promotes heat spreading away from the die
backside to ease thermal constraints.
The cache and L2 cache are industry designated names.
8
Datasheet
Intel® Pentium® III Processor with 512KB L2 Cache at 1.13GHz to 1.40GHz
1.1.2
Table 1.
Processor Naming Convention
Processor Identification
Processor
Core Frequency
(GHz)
System Bus
Frequency
(MHz)
L2 Cache Size
(Kbytes)
L2 Cache
Type2
CPUID1
1.13
1.13
133
512
ATC
06Bxh
1.26
1.26
133
512
ATC
06Bxh
1.40
1.40
133
512
ATC
06Bxh
NOTES:
1. Refer to the Pentium III Processor Specification Update for the exact CPUID for each processor.
2. ATC = Advanced Transfer Cache. ATC is an L2 Cache integrated on the same die as the processor core.
With ATC, the interface between the processor core and L2 Cache is 256-bits wide, runs at the same
frequency as the processor core and has enhanced buffering.
Datasheet
9
Intel® Pentium® III Processor with 512KB L2 Cache at 1.13GHz to 1.40GHz
1.2
Related Documents
The reader of this specification should also be familiar with material and concepts presented in the
following documents 1,2:
Document
®
AP-485, Intel Processor Identification and the CPUID Instruction
Intel Order Number
241618
AP-589, Design for EMI
243334
Intel® Architecture Software Developer's Manual
243193
Volume I: Basic Architecture
243190
Volume II: Instruction Set Reference
243191
Volume III: System Programming Guide
243192
P6 Family of Processors Hardware Developer’s Manual
244001
IA-32 Processors and Related Products 1999 Databook
243565
370-Pin Socket (PGA370) Design Guidelines
244410
PGA370 Heat Sink Cooling in MicroATX Chassis
245025
CK-408 Clock Synthesizer/Driver Specification 3
VRM 8.5 DC-DC Converter Design Guidelines
249659
Intel® Pentium® III processor with 512KB L2 Cache DP I/O Buffer Models
Extensions to the Pentium® Pro Processor BIOS Writer’s Guide3
Intel® Pentium® III processor with 512KB L2 Cache Dual Processor Design
Guide
249658
Intel® Pentium® III processor in the FC-PGA2, Thermal Design Guidelines
249660
NOTES:
1. Unless otherwise noted, this reference material can be found on the Intel Developer’s Website located at
http://developer.intel.com.
2. For a complete listing of Intel® Pentium® III processor reference material, please refer to the Intel
Developer’s Website at http://developer.intel.com/design/PentiumIII/.
3. This material is available through an Intel Field Sales Representative.
10
Datasheet
Intel® Pentium® III Processor with 512KB L2 Cache at 1.13GHz to 1.40GHz
2.0
Electrical Specifications
2.1
Processor System Bus and VREF
The Intel® Pentium® III processor with 512KB L2 Cache uses the original low voltage signaling
of the Gunning Transceiver Logic (GTL) technology for the system bus. The GTL system bus
operates at 1.25V signal levels versus GTL+ which operates at 1.5V signal levels. The GTL+ signal
technology is used by the Intel® Pentium® Pro, Intel® Pentium® II and legacy
Intel® Pentium® III processors.
Current P6 family processors vary from the Intel® Pentium® Pro processor in their output buffer
implementation. The buffers that drive the system bus signals on the Intel® Pentium® III processor
with 512KB Cache are actively driven to VTT for one clock cycle after the low to high transition to
improve rise times. These signals are open-drain and require termination to a supply. Because this
specification is different from the standard GTL specification, it is referred to as AGTL, or Assisted
GTL in this and other documentation related to the Intel® Pentium® III processor.
AGTL logic and AGTL+ logic are not compatible with each other due to differences with the signal
switching levels. Intel® Pentium® III processors with 512KB L2 Cache cannot be installed into
platforms where the chipset only supports the AGTL+ signal levels. For more information on
AGTL or AGTL+ routing, please refer to the appropriate platform design guide.
AGTL inputs use differential receivers which requires a reference voltage (VREF). VREF is used by
the differential receivers to determine if the input signal is a logical 0 or a logical 1. The VREF
signal is typically implemented as a voltage divider on the platform. Noise decoupling is critical for
the VREF signal. Refer to the platform design guide for the recommended decoupling requirements.
Another important item for the AGTL system bus is termination.
System bus termination is used to pull each signal to a high voltage level and to control reflections
on the transmission line. The processor contains on-die termination resistors that provide
termination for one end of the system bus. The other end of the system bus should also be
terminated near the chipset by resistors placed on the platform or on-die termination within the
chipset. It is recommended that the system bus is implemented using Dual-End Termination
(DET) to meet the timings and signal integrity specified by the Intel® Pentium® III processor with
512KB L2 Cache. Figure 2 is a schematic representation of the AGTL bus topology for the Intel®
Pentium® III processor with 512KB L2 Cache, when the chipset does not have on-die termination.
Note:
The RESET# signal requires a discrete external termination resistor on the system board.
Note:
The AGTL bus depends on incident wave switching. Therefore, timing calculations for AGTL
signals are based on flight time as opposed to capacitive deratings. Analog signal simulations of the
system bus, including trace lengths, is highly recommended especially when not following the
recommended layout guidelines.
Datasheet
11
Intel® Pentium® III Processor with 512KB L2 Cache at 1.13GHz to 1.40GHz
Figure 2. AGTL Bus Topology
AGTL Bus Topology in a UniProcessor Configuration
Processor
Chipset
AGTL Bus Topology in a Dual-Processor Configuration
Processor
Chipset
Processor
Note: RESET# requires external termination
Note:
2.2
Please refer to the appropriate design guide for platform specific termination.
Clock Control and Low Power States
Processors allow the use of Sleep, and Deep Sleep states to reduce power consumption by stopping
the clock to internal sections of the processor, depending on each particular state. See Figure 3 for a
visual representation of the processor low power states.
12
Datasheet
Intel® Pentium® III Processor with 512KB L2 Cache at 1.13GHz to 1.40GHz
Figure 3. Stop Clock State Machine
HALT Instruction and
HALT B us Cycle Generated
2. Auto HALT Power Down State
BCLK running.
Snoops and interrupts allowed.
INIT#, B INIT#, INTR,
SM I#, RESET#
1. Norm al State
Norm al execution.
STPCLK # Asserted
Snoop
Event
Occurs
Snoop
Event
Serviced
4. HALT/Grant Snoop S tate
BCLK running.
Service snoops to caches.
S TPCLK# De-asserted
and Stop-Grant State
entered from
AutoHALT
Snoop Event Occurs
Snoop Event S erviced
STPCLK#
Asserted
STPCLK#
De-asserted
3. Stop Grant State
BCLK running.
Snoops and interrupts allowed.
SLP#
Asserted
SLP #
De-asserted
5. Sleep S tate
BCLK running.
No snoops or interrupts allowed.
BCLK
Input
Stopped
BCLK
Input
Restarted
6. Deep S leep State
BCLK stopped.
No snoops or interrupts allowed.
PCB757a
For the processor to fully realize the low current consumption of the Stop-Grant, Sleep and Deep
Sleep states, a Model Specific Register (MSR) bit must be set. For the MSR at 02AH (Hex), bit 26
must be set to a ‘1’ (this is the power on default setting) for the processor to stop all internal clocks
during these modes. For more information, see the Intel Architecture Software Developer’s
Manual, Volume 3: System Programming Guide.
2.2.1
Normal State—State 1
This is the normal operating state for the processor.
2.2.2
AutoHALT Powerdown State—State 2
AutoHALT is a power state entered when the processor executes the HALT instruction. The
processor transitions to the Normal state upon the occurrence of SMI#, INIT#, or LINT[1:0] (NMI,
INTR). RESET# causes the processor to immediately initialize itself.
The return from a System Management Interrupt (SMI) handler can be to either Normal Mode or
the AutoHALT Power Down state. See the Intel Architecture Software Developer's Manual,
Volume III: System Programmer's Guide for more information.
FLUSH# is serviced during the AutoHALT state, and the processor will return to the AutoHALT
state.
Datasheet
13
Intel® Pentium® III Processor with 512KB L2 Cache at 1.13GHz to 1.40GHz
The system can generate a STPCLK# while the processor is in the AutoHALT Power Down state.
When the system deasserts the STPCLK# interrupt, the processor returns execution to the HALT
state.
2.2.3
Stop-Grant State—State 3
The Stop-Grant state on the processor is entered when the STPCLK# signal is asserted.
Since the AGTL signal pins receive power from the system bus, these pins should not be driven
(allowing the level to return to VTT) for minimum power drawn by the termination resistors in this
state. In addition, all other input pins on the system bus should be driven to the inactive state.
BINIT# and FLUSH# are not serviced during the Stop-Grant state.
RESET# causes the processor to immediately initialize itself, but the processor stays in Stop-Grant
state. A transition back to the Normal state occurs with the deassertion of the STPCLK# signal.
A transition to the HALT/Grant Snoop state occurs when the processor detects a snoop on the
system bus (see Section 2.2.4). A transition to the Sleep state (see Section 2.2.5) occurs with the
assertion of the SLP# signal.
While in Stop-Grant State, SMI#, INIT#, and LINT[1:0] are latched by the processor, and only
serviced when the processor returns to the Normal state. Only one occurrence of each event is
recognized and serviced upon return to the Normal state.
2.2.4
HALT/Grant Snoop State—State 4
The processor responds to snoop transactions on the system bus while in Stop-Grant state or in
AutoHALT Power Down state. During a snoop transaction, the processor enters the HALT/Grant
Snoop state. The processor stays in this state until the snoop on the system bus has been serviced
(whether by the processor or another agent on the system bus). After the snoop is serviced, the
processor returns to the Stop-Grant state or AutoHALT Power Down state, as appropriate.
2.2.5
Sleep State—State 5
The Sleep state is a very low power state in which the processor maintains its context, maintains
the phase-locked loop (PLL), and has stopped all internal clocks. The Sleep state can only be
entered from the Stop-Grant state. Once in the Stop-Grant state, the SLP# pin can be asserted,
causing the processor to enter the Sleep state. The SLP# pin is not recognized in the Normal or
AutoHALT states.
Snoop events that occur while in Sleep State or during a transition into or out of Sleep state will
cause unpredictable behavior.
In the Sleep state, the processor is incapable of responding to snoop transactions or latching
interrupt signals. No transitions or assertions of signals (with the exception of SLP# or RESET#)
are allowed on the system bus while the processor is in Sleep state. Any transition on an input
signal before the processor has returned to Stop-Grant state will result in unpredictable behavior.
If RESET# is driven active while the processor is in the Sleep state, and held active as specified in
the RESET# pin specification, then the processor will reset itself, ignoring the transition through
Stop-Grant State. If RESET# is driven active while the processor is in the Sleep State, the SLP#
and STPCLK# signals should be deasserted immediately after RESET# is asserted to ensure the
processor correctly executes the reset sequence.
14
Datasheet
Intel® Pentium® III Processor with 512KB L2 Cache at 1.13GHz to 1.40GHz
While in the Sleep state, the processor is capable of entering its lowest power state, the Deep Sleep
state, by stopping the BCLK input (see Section 2.2.6). Once in the Sleep state, the SLP# pin can be
deasserted if another asynchronous system bus event occurs. The SLP# pin has a minimum
assertion of one BCLK period.
2.2.6
Deep Sleep State—State 6
The Deep Sleep state is the lowest power state the processor can enter while maintaining context.
The Deep Sleep state is entered by stopping the BCLK input (after the Sleep state was entered from
the assertion of the SLP# pin). The processor is in Deep Sleep state immediately after BCLK is
stopped. BCLK and BCLK# have to be separated by at least 0.2V during the Deep Sleep State.
Stopping of the BCLK input lowers the overall current consumption to leakage levels.
To re-enter the Sleep state, the BCLK input must be restarted. A period of 1 ms (to allow for PLL
stabilization) must occur before the processor can be considered to be in the Sleep state. Once in
the Sleep state, the SLP# pin can be deasserted to re-enter the Stop-Grant state.
While in Deep Sleep state, the processor is incapable of responding to snoop transactions or
latching interrupt signals. No transitions or assertions of signals are allowed on the system bus
while the processor is in Deep Sleep state. Any transition on an input signal before the processor
has returned to Stop-Grant state will result in unpredictable behavior.
Table 2.
System Bus Clock in Deep Sleep Mode (Differential Mode only)1
Symbol
Parameter
Min
Max
Units
Notes
VBCLK
BCLK Voltage Level when not active
0.4
1.45
V
2
VBCLK-VBCLK#
BCLK# Voltage Level when not active
0
VBCLK -
V
2
0.2
NOTES:
1. The values in this table are based on differential probe measurement of the Bclk.
2. The DC voltage level specified must be maintained when the system bus clock is not active, e.g. Deep Sleep
Mode. VBCLK# has to be 200 mV less than VBCLK.
2.2.7
Clock Control
BCLK provides the clock signal for the processor and on-die L2 cache. During AutoHALT Power
Down and Stop-Grant states, the processor will process a system bus snoop. The processor does not
stop the clock to the L2 cache during AutoHALT Power Down or Stop-Grant states. Entrance into
the Halt/Grant Snoop state allows the L2 cache to be snooped, similar to the Normal state.
When the processor is in Sleep and Deep Sleep states, it does not respond to interrupts or snoop
transactions. During the Sleep state, the internal clock to the L2 cache is not stopped. During the
Deep Sleep state, the internal clock to the L2 cache is stopped. The internal clock to the L2 cache is
restarted only after the internal clocking mechanism for the processor is stable (i.e., the processor
has re-entered Sleep state).
PICCLK should not be removed during the AutoHALT Power Down or Stop-Grant states.
PICCLK can be removed during the Sleep or Deep Sleep states. When transitioning from the Deep
Sleep state to the Sleep state, PICCLK must be restarted with BCLK.
Datasheet
15
Intel® Pentium® III Processor with 512KB L2 Cache at 1.13GHz to 1.40GHz
2.3
Power and Ground Pins
The operating voltage for the Intel® Pentium® III processor with 512KB L2 Cache is the same for
the core and the L2 cache. VCCCORE is defined as the power pins that supply voltage to the
processor’s core and cache. The voltage regulator module (VRM) or voltage regulator is
controlled by the five voltage identification (VID) signals driven by the processor. The VID
signals specify the voltage required by the processor core. Refer to Section 2.6 for further details
on the VID voltage settings.
The Intel® Pentium® III processor with 512KB L2 cache has 74 VCCCORE, 7 VREF, 20 VTT,
VCCCMOS1.5, VCCCMOS1.8, VCCCMOS2.0 and 74 VSS inputs. The VREF inputs are used as the AGTL
reference voltage for the processor. The VTT inputs (1.25V) are used to provide an AGTL
termination voltage to the processor. VCCCMOS1.5 and VCCCMOS1.8 and VCCCMOS2.0 are not
voltage input pins to the processor but rather voltage sources for the pullup resistors which are
connected to CMOS (non-AGTL) input/output signals driven to/from the processor. The VSS
inputs are ground pins for the processor core and L2 cache.
On the platform, all VCCCORE pins must be connected to a voltage island (an island is a portion of
a power plane that has been divided, or an entire plane) to minimize any voltage drop that may
occur due to trace impedance. It is also highly recommended for the platform to provide either a
voltage island or a wide trace for the VTT pins. Similarly, all Vss pins must be connected to a
system ground plane. These recommendations can be found in the platform design guide layout
section.
2.3.1
Phase Lock Loop (PLL) Power
It is highly critical that phase lock loop power delivery to the processor meets Intel’s requirements.
A low pass filter is required for power delivery to pins PLL1 and PLL2. This serves as an isolated,
decoupled power source for the internal PLL. Please refer to the Phase Lock Loop Power section in
the appropriate platform design guide for the recommended filter implementation.
Figure 4. PLL Filter Specification
16
Datasheet
Intel® Pentium® III Processor with 512KB L2 Cache at 1.13GHz to 1.40GHz
2.4
Decoupling Guidelines
Due to the large number of transistors and high internal clock speeds, the processor is capable of
generating large average current swings between low and full power states. The fluctuations can
cause voltages on power planes to sag below their nominal values if bulk decoupling is not
adequate. Care must be taken in the board design to ensure that the voltage provided to the
processor remains within the specifications listed in Table 7. Failure to do so can result in timing
violations (in the event of a voltage sag) or a reduced lifetime of the component (in the event of a
voltage overshoot).
2.4.1
Processor VCCCORE Decoupling
The regulator for the VCCCORE input must be capable of delivering the dICCCORE/dt (defined in
Table 7) while maintaining the required tolerances (also defined in Table 7). Failure to meet these
specifications can result in timing violations (during VCCCORE sag) or a reduced lifetime of the
component (during VCCCORE overshoot).
The processor requires both high frequency and bulk decoupling on the system motherboard for
proper AGTL bus operation. The minimum recommendation for the processor decoupling
requirement is listed below. All capacitors should be placed next to and within the PGA370 socket
cavity and mounted on the primary side of the motherboard. The capacitors are arranged to
minimize the overall inductance between the VCCCORE and Vss power pins.
Decoupling Recommendations:
1) VCCCORE decoupling - A minimum of sixteen 4.7uF capacitors in a 1206 package.
2) VTT decoupling - Twenty 0.1uF capacitors in 0603 packages.
3) VREF decoupling - 0.1uF and 0.001uF capacitors in 0603 package placed near the VREF pins.
For additional decoupling requirements, please refer to the appropriate platform design guide for
recommended capacitor component value/quantity and placement.
2.5
Processor System Bus Clock and Processor Clocking
The Intel® Pentium® III processor with 512KB L2 Cache will implement an auto-detect
mechanism that will allow the processor to use either single-ended or differential signaling for the
system bus and processor clocking. The processor checks to see if the signal on pin Y33 is
toggling. If this signal is toggling then the processor operates in differential mode. Refer to Figure
5 for an example on differential clocking. Resistor values and clock topology are listed in the
appropriate platform design guide for a differential implementation. Note: References to BCLK
throughout this document will also imply to it’s complement signal, BCLK# in differential
implementations, and when noted otherwise.
The BCLK input directly controls the operating speed of the system bus interface. All AGTL
system bus timing parameters are specified with respect to the crossing point of the rising edge of
the BCLK and the falling edge of BCLK# inputs in a differential implementation. See the
P6 Family of Processors Hardware Developer's Manual for further details. The reference voltage
of the BCLK in the P6 Family of Processors Hardware Developer Manual is re-defined as the
crossing point of the BCLK and BCLK# in a differential implementation.
Datasheet
17
Intel® Pentium® III Processor with 512KB L2 Cache at 1.13GHz to 1.40GHz
Figure 5. Differential/Single-Ended Clocking Example
BCLK
Clock
Driver
Processor or
Chipset
BCLK#
Clock
Driver
2.6
BCLK
Processor
or Chipset
Voltage Identification
There are five voltage identification (VID) pins on the PGA370 socket. These pins can be used to
support automatic selection of VCCCORE voltages. The VID pins for the Intel® Pentium® III
processor with 512KB L2 Cache are open drain signals versus opens or shorts found on the
previous Intel® Pentium® III processors in the FC-PGA package. Refer to Table 11 for level
specifications for the VID signals. This pull-up resistor may be either external logic on the
motherboard or internal to the Voltage Regulator.
The VID signals rely on a 3.3V pull-up resistor to set the signal to a logic high level. The VID pins
are needed to fully support voltage specification variations on current and future processors. The
voltage selection range for the processor is defined in Table 3. The VID25mV signal is a new
signal that allows the voltage regulator or voltage regulator module (VRM) to output voltage levels
in 25mV increment necessary for the Intel® Pentium® III processor with 512KB L2 Cache only.
The legacy Pentium® III processor in the FC-PGA package will not have this VID25mV signal.
The VID25mV pin location is actually a Vss pin on the Pentium® III processor (CPUID = 068xh).
By connecting the VID25mV signal to the Vss pin, it will disable the 25mV stepping granularity
output and the regulator will resort to 50mV stepping increment. The voltage regulator or VRM
must supply the voltage that is requested or disable itself.
In addition to the new signal “VID25mV”, the Intel® Pentium® III processor with 512KB L2
Cache will introduce a second new signal labeled as “VTT_PWRGD”. The VTT_PWRGD signal
informs the platform that the VID and BSEL signals are stable and should be sampled. During
power-up, the VID signals will be in an indeterminate state for a small period of time. The voltage
regulator or the VRM should not latch the VID signals until the VTT_PWRGD signal is asserted
by the VRM and sampled active. The assertion of the VTT_PWRGD signal indicates the VID
signals are stable and are driven to the final state by the processor. Refer to Figure 14 for power-up
timing sequence for the VTT_PWRGD and the VID signals.
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Intel® Pentium® III Processor with 512KB L2 Cache at 1.13GHz to 1.40GHz
Table 3.
Voltage Identification Definition 1
VID25mV
VID3
VID2
VID1
VID0
VccCORE
0
0
1
0
0
1.05
1
0
1
0
0
1.075
0
0
0
1
1
1.10
1
0
0
1
1
1.125
0
0
0
1
0
1.15
1
0
0
1
0
1.175
0
0
0
0
1
1.20
1
0
0
0
1
1.225
0
0
0
0
0
1.25
1
0
0
0
0
1.275
0
1
1
1
1
1.30
1
1
1
1
1
1.3252
0
1
1
1
0
1.35
1
1
1
1
0
1.375
0
1
1
0
1
1.40
1
1
1
0
1
1.425
0
1
1
0
0
1.45
1
1
1
0
0
1.475
0
1
0
1
1
1.50
1
1
0
1
1
1.525
0
1
0
1
0
1.55
1
1
0
1
0
1.575
0
1
0
0
1
1.60
1
1
0
0
1
1.625
0
1
0
0
0
1.65
1
1
0
0
0
1.675
0
0
1
1
1
1.70
1
0
1
1
1
1.725
0
0
1
1
0
1.75
1
0
1
1
0
1.775
0
0
1
0
1
1.80
1
0
1
0
1
1.825
NOTES:
1. 0 = Processor pin connected to VSS. and 1 = Open on processor; may be pulled up to TTL VIH (3.3V max) on
baseboard.
2. VID[25mV, 3:0] = ‘11111’ can be used as a ‘No Core’ setting for Pentium® III processor with 512KB L2
Cache platforms to detect the absence of a processor core in a particular PGA370 socket.
The VID pins should be pulled up to a 3.3V level. This may be accomplished with pull-ups internal
to the voltage regulator, which ensures valid VID pull-up voltage during power-up and powerdown sequences. If external resistors are used for the VID[3:0, 25mV] signal, then the power
source must be guaranteed to be stable whenever the supply to the voltage regulator is stable. This
will prevent the possibility of the processor supply going above the specified VCCCORE in the event
of a failure in the supply for the VID lines. In the case of a DC-to-DC converter, this can be
accomplished by using the input voltage to the converter for the VID line pull-ups. A resistor equal
to 1 K Ohms may be used to connect the VID signals to the voltage regulator input.
Datasheet
19
Intel® Pentium® III Processor with 512KB L2 Cache at 1.13GHz to 1.40GHz
Intel requires that designs utilize VRM 8.5 and not VRM 8.4 specifications to meet the Intel®
Pentium® III processor with 512KB L2 Cache requirements.
To re-emphasize, VRM 8.5 introduces two new signals [VID25mV and VTT_PWRGD] that is
utilized by the Intel® Pentium® III processor with 512KB L2 Cache and platform. Ignoring and
not connecting these two new pins, as documented in the Platform Design Guidelines, will prevent
the Intel® Pentium® III processor with 512KB L2 Cache from operating at the specified voltage
levels and core frequency. Figure 6 provides a high-level interconnection schematic. Please refer
to the VRM 8.5 DC-DC Converter Design Guideline and the appropriate Platform Design
Guidelines for further detailed information on the voltage identification and bus select
implementation.
Refer to Figure 14 for VID power-up sequence and timing requirements.
Figure 6. VTT Power Good and Bus Select Interconnect Diagram
VID[3:0,25mV]
Vtt
Vtt
VRM 8.5
Voltage Regulator
Vcc_core
VTT_PWRGD
(output)
Vtt
1k
Vcc_core
Pentium® III
processor with
512KB L2 Cache
VTT_PWRGD
(input)
BSEL [1:0]
Clock
Driver
Note: Please refer to the Intel® Pentium® III Processor with 512KB L2 Cache Dual Processor
Platform Design Guide for VTT_PWRGD implementation for a Pentium® III processor with
512KB L2 Cache platform.
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Datasheet
Intel® Pentium® III Processor with 512KB L2 Cache at 1.13GHz to 1.40GHz
2.7
Processor System Bus Unused Pins
All RESERVED pins must remain unconnected unless specifically noted. Connection of these pins
to VCCCORE, VREF, VSS, VTT or to any other signal (including each other) can result in component
malfunction or incompatibility with future processors. See Section 5.4 for a pin listing of the
processor and the location of each RESERVED pin.
PICCLK must be driven with a valid clock input and the PICD[1:0] signals must be pulled-up to
VCCCMOS1.5 even when the APIC will not be used. A separate pull-up resistor must be provided for
each PICD signal.
For reliable operation, always connect unused inputs or bidirectional signals to their deasserted
signal level. The pull-up or pull-down resistor values are system dependent and should be chosen
such that the logic high (VIH) and logic low (VIL) requirements are met. See Table 11 for level
specifications of non-AGTL signals.
For unused AGTL inputs, the on-die termination will be sufficient. No external RTT is necessary on
the motherboard
For unused CMOS inputs, active low signals should be connected through a pull-up resistor to
VCCCMOS1.5 and meet VIH requirements. Unused active high CMOS inputs should be connected
through a pull-down resistor to ground (VSS) and meet VIL requirements. Unused CMOS outputs
can be left unconnected. A resistor must be used when tying bidirectional signals to power or
ground. When tying any signal to power or ground, a resistor will also allow for system testability.
2.8
Processor System Bus Signal Groups
To simplify the following discussion, the processor system bus signals have been combined into
groups by buffer type. All P6 family processor system bus outputs are open drain and require a
high-level source provided termination resistors. However, the Intel® Pentium® III processor with
512KB L2 Cache includes on-die termination for AGTL signals and termination resistors placed on
the platform are not necessary except for the RESET# signal which still requires external
termination.
AGTL input signals have differential input buffers which use VREF as a reference signal. AGTL
output signals require termination to 1.25 V. In this document, the term “AGTL Input” refers to the
AGTL input group as well as the AGTL I/O group when receiving. Similarly, “AGTL Output”
refers to the AGTL output group as well as the AGTL I/O group when driving.
The PWRGOOD signal input is a 1.8V signal level and must be pulled up to VCCCMOS1.8. The
VTT_PWRGD is not 1.8V tolerant and must be connected to VTT (1.25V). Other CMOS inputs
(A20M#, IGNNE#, INIT#, LINT0/INTR, LINT1/NMI, PREQ#, SMI, SLP#, and STPCLK#) are
only 1.5 V tolerant and must be pulled up to VCCCMOS1.5. The CMOS, APIC, and TAP outputs are
open drain and must be pulled to the appropriate level to meet the input specifications of the
interfacing device.
The groups and the signals contained within each group are shown in Table 4. Refer to Section 7.0
for a description of these signals.
Datasheet
21
Intel® Pentium® III Processor with 512KB L2 Cache at 1.13GHz to 1.40GHz
Table 4.
System Bus Signal Groups 1
Group Name
Signals
AGTL Input
BPRI#, DEFER#, RESET#, RSP#
AGTL Output
PRDY#
AGTL I/O
A[35:3]#, ADS#, AERR#, AP[1:0]#, BERR#, BINIT#, BNR#, BP[3:2]#, BPM[1:0]#,
BR0#2, BR1#, D[63:0]#, DBSY#, DEP[7:0]#, DRDY#, HIT#, HITM#, LOCK#, REQ[4:0]#,
RP#, RS[2:0]#, TRDY#
CMOS Input
(1.25V)3
VTT_PWRGD
CMOS Input
(1.5V)4
A20M#, FLUSH#, IGNNE#, INIT#, LINT0/INTR, LINT1/NMI, PREQ#, SLP#, SMI#,
STPCLK#
CMOS Input
(1.8V)5
PWRGOOD
CMOS Output
(1.5V)4
CMOS Output8
(3.3V)
System Bus
Clock10
FERR#, IERR#, THERMTRIP#
VID[3:0,25mV], BSEL[1:0]
BCLK0, BCLK0#
(1.25V/2.5V)
APIC Clock9
APIC I/O
4
PICD[1:0]
TAP Input4
TAP Output
PICCLK
TCK, TDI, TMS, TRST#
4
Power/Other6
TDO
CPUPRES#, DYN_OE, NCHTRL, PLL[2:1], SLEWCTRL, RTTCTRL7,THERMDN,
THERMDP, VCCCORE, VREF, VSS, VTT, Reserved,
NOTES:
1. See Section 7.0 for information on the these signals.
2. The BR0# pin is the only BREQ# signal that is bidirectional. See Section 7.0 for more information.
3. This signal is 1.25V.
4. These signals are 1.5V.
5. This signal is 1.8V.
6. VCCCORE is the power supply for the processor core and is described in Section 2.6.
VID[3:0,25mV] is described in Section 2.6.
VTT is used to terminate the system bus and generate VREF on the motherboard.
VSS is system ground.
BSEL[1:0] is described in Section 2.8.2 and Section 7.0.
All other signals are described in Section 7.0.
7. This signal is used to control the value of the processor on-die termination resistance. Refer to the platform
design guide for the recommended pulldown resistor value.
8. These signals are 3.3V.
9. These signals are 2.0V.
10. 1.25V signal for Differential clock application and 2.5V for Single-ended clock application.
2.8.1
Asynchronous vs. Synchronous for System Bus Signals
All AGTL signals are synchronous to BCLK (BCLK/BCLK#). All of the CMOS, Clock, APIC,
and TAP signals can be applied asynchronously to BCLK (BCLK/BCLK#). All APIC signals are
synchronous to PICCLK. All TAP signals are synchronous to TCK.
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Intel® Pentium® III Processor with 512KB L2 Cache at 1.13GHz to 1.40GHz
2.8.2
System Bus Frequency Select Signals
The System Bus Frequency Select Signals (BSEL [1:0]) are used to select the system bus
frequency for the Intel® Pentium® III processor. The BSEL signals are also used by the chipset and
system bus clock generator. The BSEL pins for the Intel® Pentium® III processor with 512KB L2
Cache are open drain signals versus opens or shorts found on the previous Intel® Pentium® III
processor in the FC-PGA package. Refer to Table 11 for level specifications for the BSEL signals.
The BSEL signals rely on a 3.3V pull-up resistor to set the signal to a logic high level. Similar to
the VID signals described in Section 2.6, the VTT_PWRGD signal also informs the platform that
the BSEL signals are stable and should be sampled. During power-up, the BSEL signals will be in
an indeterminate state for a small period of time. The chipset or system bus clock generator should
not sample and/or latch the BSEL signals until the VTT_PWRGD signal is asserted. The assertion
of the VTT_PWRGD signal indicates the BSEL signals are stable and are driven to the final state
by the processor. Refer to Figure 14 for power-up timing sequence for the VTT_PWRGD and the
BSEL signals.
Table 5 defines the possible combinations of the BSEL signals and the frequency associated with
each combination. The frequency selection is determined by the processor(s) and driven out to the
chipset and system bus clock generator. All system bus agents must operate at the same frequency
determined by the processor. The Intel® Pentium® III processor with 512KB L2 Cache operates
at 133MHz system bus frequency based on the system bus specified rating marked on the package.
Over or under-clocking the system bus frequency outside the specified rating marked on the
package is not recommended.
Figure 7. BSEL[1:0] Example for a System Design
3 .3 V
3 .3 V
P ro c e s s o r
K ohm
1K
ohm
B S E L0
B S E L1
C lo c k
D r iv e r
C h ip s e t
Table 5.
Datasheet
Frequency Select Truth Table for BSEL[1:0]
BSEL1
BSEL0
Frequency
0
0
Reserved
0
1
Reserved
1
0
Reserved
1
1
133 MHz
23
Intel® Pentium® III Processor with 512KB L2 Cache at 1.13GHz to 1.40GHz
2.9
Maximum Ratings
Table 6 contains processor stress ratings only. Functional operation at the absolute maximum and
minimum is not implied nor guaranteed. The processor should not receive a clock while subjected
to these conditions. Functional operating conditions are given in the timing and level tables in
Section 2.10 through Section 2.12. Extended exposure to the maximum ratings may affect device
reliability. Furthermore, although the processor contains protective circuitry to resist damage from
static electric discharge, one should always take precautions to avoid high static voltages or electric
fields.
Table 6.
Absolute Maximum Ratings
Symbol
Parameter
Min
Max
Unit
Notes
TSTORAGE
Processor storage temperature
-40
85
°C
VCCCORE and
VTT
Processor core voltage and termination
supply voltage with respect to VSS
0.5
1.75
V
VinAGTL
AGTL buffer input voltage
-0.3
1.78
V
1, 3
VinCMOS1.5
CMOS buffer DC input voltage with respect
to VSS
-0.3
2.08
V
2, 3, 4
VVID & VBSEL
Max VID and BSEL pin current
-0.3
3.6
V
NOTES:
1. Input voltage can never exceed VSS +1.78 volts.
2. Input voltage can never exceed VSS + 2.08 volts.
3. Input voltage can never go below -0.3V
4. Parameter applies to CMOS, APIC, and TAP bus signal groups only.
2.10
Processor Voltage Level Specifications
The processor voltage level specifications in this section are defined at the PGA370 socket pins
(bottom side of the motherboard). See Section 7.0 for the processor signal descriptions and Section
5.4 for the signal listings.
Most of the signals on the processor system bus are in the AGTL signal group. These signals are
specified to be terminated to 1.25V. The voltage level specifications for these signals are listed in
Table 10 on page 28.
To allow connection with other devices, the clock, CMOS, APIC, and TAP signals are designed to
interface at non-AGTL levels. The voltage level specifications for these pins are listed in Table 11
on page 28.
Table 7 through Table 13 list the voltage level specifications for the Intel® Pentium® III processor
with 512KB L2 Cache. Specifications are valid only while meeting specifications for junction
temperature, clock frequency, and input voltages. Care should be taken to read all notes associated
with each parameter.
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Datasheet
Intel® Pentium® III Processor with 512KB L2 Cache at 1.13GHz to 1.40GHz
Table 7.
Voltage and Current Specifications 1, 2
Symbol
VCCCORE
Parameter
VCC for processor core
Core Freq
Min
Typ
Max
Unit
1.13GHz
1.45
V
1.26GHz
1.45
V
1.40GHz
1.45
V
Notes
3
VTT
Static AGTL bus
termination voltage
1.25
V
1.25 ±3%, 4
VTT
Transient AGTL bus
termination voltage
1.25
V
1.25 ±9%, 4
Vcc_cmos1.5
1.5
V
1.5 ± 10%, 12
Vcc_cmos1.8
1.8
V
1.8 ± 10%, 12
V
5
V
5
Baseboard
VCCCORE
Tolerance,
Static
Processor core voltage
static tolerance level at the
PGA370 socket pins
Baseboard
VCCCORE
Tolerance,
Transient
Processor core voltage
transient tolerance level at
the PGA370 socket pins
ICCCORE
Icc for processor core
Please refer to Figure 8
and Table 9 for Tolerance
values
1.13GHz
19.4
A
1.26GHz
20.5
A
1.40GHz
21.8
A
6
ICCCMOS1.5
ICC for VccCMOS1.5
250
mA
ICCCMOS1.8
ICC for VccCMOS1.8
1
mA
ICCCMOS3.3
ICC for VccCMOS3.3
35
mA
IVTT
Termination voltage supply
current
2.3
A
1.13GHz
13.2
A
ISGnt
ICC Stop-Grant for
processor core
1.26GHz
14.0
A
1.40GHz
14.8
A
10.2
A
Please refer to Table 8 for
Slew Rate
A/
µs
8, 9, 10, 11
Table
13
A/
µs
8, 9, 10 See
Table 13
IDSLP
ICC Deep Sleep for
processor core
dICCCORE/dt
Power supply current slew
rate
dIvTT/dt
Termination current slew
rate
7, 8
NOTES:
1. Unless otherwise noted, all specifications in this table apply to all processor frequencies.
2. All specifications in this table apply only to the Intel® Pentium® III processor with 512KB L2 Cache.
3. VccCORE and IccCORE supply the processor core and the on-die L2 cache.
4. VTT must be held to 1.25V ±9% while the AGTL bus is active. It is required that VTT be held to 1.25V ±3%
while the processor system bus is static (idle condition). The ±3% range is the required design target; ±9%
will come from the transient noise added. This is measured at the PGA370 socket pins on the bottom side of
the baseboard.
5. These are the tolerance requirements, across a 20 MHz frequency bandwidth, measured at the
processor socket pin on the soldered-side of the motherboard. VCCCORE must return to within the static
voltage specification within 100 µs after a transient event; see the VRM 8.5 DC-DC Converter Design
Guidelines for further details.
6. Maximum ICC is measured at VCC typical voltage and under a maximum signal loading conditions.
7. The current specified is also for AutoHALT state.
8. Maximum values are specified by design/characterization at nominal VccCORE.
Datasheet
25
Intel® Pentium® III Processor with 512KB L2 Cache at 1.13GHz to 1.40GHz
9. Based on simulation and averaged over the duration of any change in current. Use to compute the maximum
inductance tolerable and reaction time of the voltage regulator. This parameter is not tested.
10.dIcc/dt specifications are measured and specified at the PGA370 socket pins.
11. Static voltage regulation includes: DC output initial voltage set point adjust, Output ripple and noise, Output
load ranges specified in the tables above. See VRM 8.5 DC-Dc Converter Design Guidelines.
12.Pull ups only.
Table 8.
Power Supply Current Slew Rate (dIcccore/dt)
Slew R ate – 26A L oad Step
Slew R ate (26A ) – IC C @ socket
30
Icc @ socket (A)
25
20
15
10
5
0
0
1
2
3
4
5
6
PW L Slew R ate D ata
T im e (uS) Icc @ socket (A)
0.1
26.23
0.15
23.18
0.5
20.03
1
21.10
1.5
21.88
2
22.29
2.5
22.30
3
22.07
3.5
21.78
4
21.58
4.5
21.51
Table 8 contains typical slew rate data for the Intel® Pentium® III processor with 512KB L2
Cache. Actual slew rate values and wave-shapes may vary slightly depending on the type and size
of decoupling capacitors used in a particular implementation.
26
Datasheet
Intel® Pentium® III Processor with 512KB L2 Cache at 1.13GHz to 1.40GHz
Table 9.
Vcc Static & Transient Tolerance
Voltage Deviation from VID Setting (mV)
Static Tolerance
Transient Tolerance
Icc (A)
Min
Max
Min
Max
0
25
65
0
90
2
19
59
-6
84
4
12
52
-13
77
6
6
46
-19
71
8
-1
39
-26
64
10
-7
33
-32
58
12
-14
26
-39
51
14
-20
20
-45
45
16
-26
14
-51
39
18
-33
7
-58
32
20
-39
1
-64
26
22
-46
-6
-71
19
24
-52
-12
-77
13
26
-59
-19
-84
6
28
-65
-25
-90
0
Figure 8. Vcc Static & Transient Tolerance
Vcc Droop from VID setting (mV)
100
80
Transient Maximum Load Line
Static Maximum Load Line
60
40
20
0
-20
-40
-60
-80
-100
Static Minimum Load Line
Transient Minimum Load Line
0
4
8
12
16
20
24
28
Icc Load (A)
Datasheet
27
Intel® Pentium® III Processor with 512KB L2 Cache at 1.13GHz to 1.40GHz
Table 10. AGTL Signal Group Levels Specifications 1
Symbol
Parameter
Min
Max
Unit
Notes
VREF - 0.200
V
6
V
2, 3, 6
VIL
Input Low Voltage
VIH
Input High Voltage
Ron
Buffer On Resistance
16.67
Ω
5
IL
Leakage Current for inputs,
outputs, and I/O
±100
µA
4, 7
VREF + 0.200
NOTES:
1. Unless otherwise noted, all specifications in this table apply to Intel® Pentium® III processors with 512KB L2
cache at all frequencies.
2. All inputs, outputs, and I/O pins must comply with the signal quality specifications in Section 3.0.
3. Minimum and maximum VTT are given in Table 13 on page 29.
4. (0 ≤ VIN ≤ 1.25 V +3%) and (0≤VOUT≤1.25V+3%).
5. Refer to the processor I/O Buffer Models for I/V characteristics.
6. Steady state input voltage must not be above VSS + 1.65V or below VTT - 1.65V.
7. Does not apply to Vcc leakage current due to the presence of on die RTT.
Table 11. Non-AGTL Signal Group Levels Specifications 1
Symbol
Parameter
Min
Max
Unit
Notes
VIL1.2
Input Low Voltage
0.4
V
11
VIL1.5
Input Low Voltage
–0.150
Vcmos_ref - 0.300
V
10
VIL1.8
Input Low Voltage
-0.36
0.36
V
8
VIL2.0
Input Low Voltage
-0.40
0.40
V
9
VIH1.2
Input High Voltage
1.08
V
11
VIH1.5
Input High Voltage
Vcmos_ref +
0.250
VCC_CMOS1.5 +
10%
V
6, 10, 12
VIH1.5PICD
Input High Voltage PICD[1:0]
Vcmos_ref +
0.200
2.0
V
12, 13
VIH1.8
Input High Voltage
1.44
2.16
V
8
VIH2.0
Input High Voltage
1.60
V
9
30
Ron
Ω
2
7, 9, All
outputs are
open-drain
VOL
Output Low Voltage
0.30
V
IOL
Output Low Current
10
mA
ILI
Input Leakage Current
±100
µA
3, 6
ILO
Output Leakage Current
±100
µA
3, 4, 6, 7
NOTES:
1. Unless otherwise noted, all specifications in this table apply to Intel® Pentium® III processors with 512KB L2
cache at all frequencies.
2. Parameter measured at 9 mA (for use with TTL inputs).
3. (0 ≤ VIN ≤ 1.8V +10%).
4. (0 ≤ VOUT ≤ 1.8V +10%).
5. For BCLK specifications, refer to Table 23 on page 42.
6. (0 ≤ VIN ≤ 1.5V +10%).
7. (0 ≤ VOUT ≤ 1.5V +10%).
8. Applies to non-AGTL signal PWRGOOD.
9. Applies to non-AGTL signal PICCLK.
10.Applies to non-AGTL signals except BCLK, PICCLK, and PWRGOOD.
11. Applies to non-AGTL signal VTT_PWRGD.
12.Vcmos_ref = 2/3 Vcc_cmos1.5, refer to Table 7 on page 25.
13.Applies to PICD[1:0].
28
Datasheet
Intel® Pentium® III Processor with 512KB L2 Cache at 1.13GHz to 1.40GHz
Table 12. 3.3 Volt CMOS Output Signal Group DC Specifications
Symbol
2.11
Parameter
Min
Max
Unit
Notes
3.3 + 5%
V
Nominal Voltage
3.45
V
VOH
Output High Voltage
0.9
V
ILO
Output Leakage Current
100
µA
AGTL System Bus Specifications
It is recommended that the AGTL bus be routed in a daisy-chain fashion with termination resistors
to VTT. These termination resistors are placed electrically between the ends of the signal traces and
the VTT voltage supply. The valid high and low levels are determined by the input buffers using a
reference voltage called VREF. Refer to the appropriate platform design guide for more information
Table 13 below lists the nominal specification for the AGTL termination voltage (VTT). The AGTL
reference voltage (VREF) is generated on the system motherboard and should be set to 2/3 VTT for
the processor and other AGTL logic. It is important that the baseboard impedance be specified and
held to a ±15% tolerance, and that the intrinsic trace capacitance for the AGTL signal group traces
is known and well-controlled. For more details on the AGTL buffer specification, see the
Intel® Pentium® II Processor Developer's Manual and AP-585, Intel® Pentium® II Processor
AGTL Guidelines.
Table 13. Processor AGTL Bus Specifications 1, 2
Symbol
VTT
Parameter
Bus Termination Voltage
On-die RTT
Termination Resistor
VREF
Bus Reference Voltage
Min
Typ
1.1375
1.25
50
56
68
2/3VTT
Max
115
Units
Notes
V
3
Ω
4
V
5
NOTES:
1. Unless otherwise noted, all specifications in this table apply to Intel® Pentium® III processors with 512KB L2
cache at all frequencies.
2. Intel® Pentium® III processors with 512KB L2 cache for the PGA370 socket contain AGTL termination
resistors on the processor die, except for the RESET# input.
3. VTT must be held to 1.25V ±9%. It is required that VTT be held to 1.25V ±3% while the processor system bus
is idle (static condition). This is measured at the PGA370 socket pins on the bottom side of the baseboard.
4. Uni-processor platforms require a 56Ω resistor and dual-processor platforms require a 68Ω resistor.
Tolerance for on-die Rtt is +/-10% (56, 68Ω resistors). Rtt is +/-15% (100Ω resistors).
5. VREF is generated on the motherboard and should be 2/3 VTT ±5% nominally. Ensure that there is adequate
VREF decoupling on the motherboard.
2.12
System Bus Timing Specifications
The processor system bus timings specified in this section are defined at the socket pins on the
bottom of the motherboard. Unless otherwise specified, timings are tested at the processor pins
during manufacturing. Timings at the processor pins are specified by design characterization. See
Section 7.0 for the processor signal definitions.
Datasheet
29
Intel® Pentium® III Processor with 512KB L2 Cache at 1.13GHz to 1.40GHz
Table 14 through Table 20 list the timing specifications associated with the processor system bus.
These specifications are divided into the following categories: Table 14 contains the system bus
clock specifications for single-ended clock mode operation and Table 15 contains the system bus
clock specifications for differential clock mode operation. Table 16 contains the AGTL
specifications, Table 17 contains the CMOS signal group specifications, Table 18 contains timings
for the reset conditions, Table 19 and covers APIC bus timing, and Table 20 covers TAP timing.
All processor system bus timing specifications for the AGTL signal group are relative to the rising
edge of the BCLK input. All AGTL timings are referenced to VREF for both ‘0’ and ‘1’ logic levels
unless otherwise specified.
The timings specified in this section should be used in conjunction with the I/O buffer models
provided by Intel. These I/O buffer models, which include package information, are available for
the Intel® Pentium® III processor with 512KB L2 Cache in the FC-PGA2 package in IBIS* 3.1
model format. These I/O buffer models are available at Intel’s Developer Website (http://
developer.intel.com).
AGTL layout guidelines are also available in the appropriate platform design guide.
Care should be taken to read all notes associated with a particular timing parameter.
30
Datasheet
Intel® Pentium® III Processor with 512KB L2 Cache at 1.13GHz to 1.40GHz
7
Table 14. System Bus Timing Specifications (Single-Ended Clock)1,4
133 MHz
100 MHz
T# Parameter
Min
Max
Min
Max
Unit
Figure
T1: BCLK Period - average
7.5
7.65
10.0
10.15
nS
9
T1abs: BCLK Period - Instantaneous
minimum
7.25
T2: BCLK Period Stability
9.75
2
2
250
pS
T5: BCLK Rise Time
0.4
1.6
0.4
1.6
nS
10
3
T6: BCLK Fall Time
0.4
1.6
0.4
1.6
nS
10
3
T3: BCLK High Time
1.4
2.5
nS
10
5
T4: BCLK Low Time
1.4
2.4
nS
10
6
T7: BCLK Input High
2.2
2.2
V
T8: BCLK Input Low
250
nS
Notes
0.3
0.3
2
V
NOTES:
1. Unless otherwise noted, all specifications in this table apply to Intel® Pentium® III processors with 512KB L2
cache at all frequencies.
2. Period, jitter, offset and skew measured at 1.25V.
3. Measured from 0.5 to 2.0V.
4. CLKREF (BCLK#) = 1.25V with +/- 5% DC tolerance. CLKREF must be generated from a stable source. AC
tolerances must be less than -40dB @ 1MHz.
5. BCLK High Time is measured above 2.0V.
6. BCLK Low Time is measured below 0.5V.
Datasheet
31
Intel® Pentium® III Processor with 512KB L2 Cache at 1.13GHz to 1.40GHz
Table 15. System Bus Timing Specifications (Differential Clock)1, 2, 6
133 MHz
100 MHz
T# Parameter
Min
Max
Min
Max
Unit
Figure
T1: BCLK Period - average
7.5
7.7
10.0
10.2
nS
9
T1abs: BCLK Period - Instantaneous
minimum
7.30
T2: BCLK Period Stability
9.8
200
nS
Notes
3, 4
3, 4
200
pS
Vcross: Crossing point at 1V Swing
0.51
0.76
0.51
0.76
V
9
T5: BCLK Rise Time
175
550
175
550
pS
10
7, 8
T6: BCLK Fall Time
175
550
175
550
pS
10
7, 8
325
pS
BCLK Duty Cycle
45%
55%
45%
55%
Input High Voltage
0.92
1.45
0.92
1.45
V
Input Low Voltage
-0.2
0.35
-0.2
0.35
V
Rising Edge Ring Back
0.35
-0.35
V
Rise/Fall Time Matching
325
Falling Edge Ring Back
0.35
-0.35
5
4
V
1. Unless otherwise noted, all specifications in this table apply to Intel® Pentium® III processors with 512KB L2
cache at all frequencies.
2. All timings for the AGTL signals are referenced at the rising edge of BCLK and the falling edge of BCLK# at
the processor pin. All AGTL signal timings (address bus, data bus, etc.) are referenced at 1.00V at the
processor pins.
3. The internal core clock frequency is derived from the processor system bus clock. The system bus clock to
core clock ratio is determined during initialization. Individual processors will only operate at their specified
system bus frequency, 133 MHz. Table 16 shows the supported ratios for each processor.
4. Due to the difficulty of accurately measuring clock jitter in a system, it is recommended that a clock driver be
used that is designed to meet the period stability specification into a test load of 10 to 20 pF. This should be
measured at adjacent crossing points of BCLK and BCLK# which is defined as the rising edge of BCLK and
the falling edge of BCLK# at the processor pin. The jitter present must be accounted for as a component of
BCLK timing skew between devices.
5. The clock driver’s closed loop jitter bandwidth must be set low to allow any PLL-based device to track the
jitter created by the clock driver. The –20 dB attenuation point, as measured into a 10 to 20 pF load, should
be less than 500 kHz. This specification may be ensured by design characterization and/or measured with a
spectrum analyzer. See the appropriate clock synthesizer/driver specification for details
6. Measurement taken from differential waveform, defined as BCLK - BCLK#.
7. Rise time is measured from -0.35 to +0.35V and fall time is measured from 0.35V to -0.35V.
8. Measured at the socket pin.
Table 16. System Bus Timing Specifications (AGTL Signal Group)1, 2, 3
T# Parameter
T7: AGTL Output Valid Delay
Min
Max
Unit
Figure
0.40
3.25
ns
11
Notes
4
T8: AGTL Input Setup Time
0.95
ns
12
5, 6, 7, 10
T9: AGTL Input Hold Time
1.00
ns
12
8
T10: RESET# Pulse Width
1.00
ms
13
6, 9
NOTES:
1. Unless otherwise noted, all specifications in this table apply to Intel® Pentium® III processors with 512KB L2
Cache at all frequencies.
2. These specifications are tested during manufacturing.
3. All timings for the AGTL signals are referenced to the rising edge of BCLK and the falling edge of BCLK# at
the processor pin. All AGTL signal timings (compatibility signals, etc.) are referenced at 0.80V at the
processor pins.
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Datasheet
Intel® Pentium® III Processor with 512KB L2 Cache at 1.13GHz to 1.40GHz
4. Valid delay timings for these signals are specified into 50 Ω to 1.25V, VREF at 0.8 V ±2% and with 56 Ω or
68Ω on-die RTT.
5. A minimum of 3 clocks must be guaranteed between two active-to-inactive transitions of TRDY#.
6. RESET# can be asserted (active) asynchronously, but must be deasserted synchronously.
7. Specification is for a minimum 0.40 V swing from VREF - 200 mV to VREF + 200 mV. This assumes an edge
rate of 0.3V/ns.
8. Specification is for a maximum 0.8 V swing from VTT - 0.8V to VTT. This assumes an edge rate of 3V/ns.
9. This should be measured after VCCCORE, VTT, VccCMOS, and BCLK (and BCLK#) are stable
10.BREQ signals observe a 1.2nS minimum setup time.
Table 17. System Bus Timing Specifications (CMOS Signal Group) 1, 2, 3, 4
T# Parameter
Min
Max
Unit
Figure
Notes
T14: CMOS Input Pulse Width, except
PWRGOOD
2
BCLKs
11
Active and
Inactive states
T15: PWRGOOD Inactive Pulse Width
10
BCLKs
15
5
NOTES:
1. Unless otherwise noted, all specifications in this table apply to Intel® Pentium® III processors with 512KB L2
cache at all frequencies
2. These specifications are tested during manufacturing.
3. These signals may be driven asynchronously.
4. All CMOS outputs shall be asserted for at least 2 system bus clocks.
5. When driven inactive or after VCCCORE, VTT, VCCCMOS, and BCLK and BCLK# are stable.
Datasheet
33
Intel® Pentium® III Processor with 512KB L2 Cache at 1.13GHz to 1.40GHz
Table 18. System Bus Timing Specifications (Reset Conditions) 1
T# Parameter
Min
T16: Reset Configuration Signals
(A[14:5]#, BR0#, INIT#) Setup Time
4
T17: Reset Configuration Signals
(A[14:5]#, BR0#, INIT#) Hold Time
2
Max
20
Unit
Figure
Notes
BCLKs
13
Before deassertion
of RESET#
BCLKs
13
After clock that
deasserts RESET#
NOTE:
1. Unless otherwise noted, all specifications in this table apply to Intel® Pentium® III processors with 512KB L2
cache frequencies.
Table 19. System Bus Timing Specifications (APIC Clock and APIC I/O)1, 2, 3
Min
Max
Unit
T21: PICCLK Frequency
T# Parameter
2.0
33.3
MHz
T22: PICCLK Period
30.0
500.0
ns
T23: PICCLK High Time
10.5
ns
10
@ > 1.60V
T24: PICCLK Low Time
10.5
ns
10
@ < 0.40V
T25: PICCLK Rise Time
0.25
3.0
ns
10
(0.40V - 1.60V)
3.0
ns
10
(1.60 - 0.40V)
ns
12
4
T26: PICCLK Fall Time
0.25
T27: PICD[1:0] Setup Time
8.0
Figure
Notes
10
T28: PICD[1:0] Hold Time
2.5
ns
12
4
T29a: PICD[1:0] Valid Delay (Rising Edge)
1.5
8.7
ns
11
4, 5, 6
T29b: PICD[1:0] Valid Delay (Falling Edge)
1.5
12.0
ns
10
4, 5, 6
NOTES:
1. Unless otherwise noted, all specifications in this table apply to Intel® Pentium® III processors with 512KB L2
cache at all frequencies.
2. These specifications are tested during manufacturing.
3. All timings for the APIC I/O signals are referenced to the PICCLK rising edge at 0.9 V at the processor pins.
All APIC I/O signal timings are referenced at 1.0 V at the processor pins.
4. Referenced to PICCLK rising edge.
5. For open drain signals, valid delay is synonymous with float delay.
6. Valid delay timings for these signals are specified into 150 Ω load pulled up to 1.5 V.
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Intel® Pentium® III Processor with 512KB L2 Cache at 1.13GHz to 1.40GHz
Table 20. System Bus Timing Specifications (TAP Connection)1, 2, 3
T# Parameter
Min
T30: TCK Frequency
Max
Unit
16.667
MHz
Figure
T31: TCK Period
60.0
ns
10
T32: TCK High Time
25.0
ns
10
T33: TCK Low Time
25.0
ns
10
T34: TCK Rise Time
5.0
ns
10
Notes
Vcmos_ref +
0.200V, 10
Vcmos_ref - 0.200V,
10
(Vcmos_ref 0.200V) (Vcmos_ref +
0.200V),
4, 10
T35: TCK Fall Time
5.0
ns
10
(Vcmos_ref +
0.200V) (Vcmos_ref 0.200V),
4, 10
T36: TRST# Pulse Width
40.0
ns
17
Asynchronous, 10
T37: TDI, TMS Setup Time
5.0
ns
16
5
T38: TDI, TMS Hold Time
14.0
T39: TDO Valid Delay
1.0
T40: TDO Float Delay
T41: All Non-Test Outputs Valid Delay
2.0
T42: All Non-Test Inputs Setup Time
ns
16
5
10.0
ns
16
6, 7
25.0
ns
16
6, 7, 10
25.0
ns
16
6, 8, 9
25.0
ns
16
6, 8, 9, 10
T43: All Non-Test Inputs Setup Time
5.0
ns
16
5, 8, 9
T44: All Non-Test Inputs Hold Time
13.0
ns
16
5, 8, 9
NOTES:
1. Unless otherwise noted, all specifications in this table apply to Intel® Pentium® III processors with 512KB L2
cache at all frequencies.
2. All timings for the TAP signals are referenced to the TCK rising edge at 1.0 V at the processor pins. All TAP
signal timings (TMS, TDI, etc.) are referenced at 1.0 V at the processor pins.
3. These specifications are tested during manufacturing, unless otherwise noted.
4. 1 ns can be added to the maximum TCK rise and fall times for every 1 MHz below 16.667 MHz.
5. Referenced to TCK rising edge.
6. Referenced to TCK falling edge.
7. Valid delay timing for this signal is specified to 1.5 V.
8. Non-Test Outputs and Inputs are the normal output or input signals (besides TCK, TRST#, TDI, TDO, and
TMS). These timings correspond to the response of these signals due to TAP operations.
9. During Debug Port operation, use the normal specified timings rather than the TAP signal timings.
10.Not 100% tested. Specified by design characterization.
Datasheet
35
Intel® Pentium® III Processor with 512KB L2 Cache at 1.13GHz to 1.40GHz
Table 21. Platform Power-On Timings2
T# Parameter
Min
T45: Valid Time Before VTT_PWRGD
T46: Valid Time Before PWRGOOD
Max
Unit
Figure
Notes
1.0
mS
14
1
2.0
mS
14
1
T47: RESET# Inactive to Valid Outputs
1
BCLK
14
1
T48: RESET# Inactive to Drive Signals
4
BCLK
14
1
NOTES:
1. All signals, during their invalid states, must be guarded against spurious levels from effecting the platform
during processor power-up sequence.
2. Configuration Input signals include: A[14:5], BR0#, BR1#, INIT#. For timing of these signals, please refer to
Table 17 and Figure 13.
Notes: For Figure 9 through Figure 19, the following apply:
1. Figure 9 through Figure 19 are to be used in conjunction with Table 14 through Table 20.
2. All timings for the AGTL signals at the processor pins are referenced to the rising edge of
BCLK and the falling edge of BCLK# at the crossing point for differential clock mode and to
the rising edge of BCLK at BCLKVREF (1.25V) for single-ended clock mode. All AGTL signal
timings (address bus, data bus, etc.) are referenced at 2/3 of VTT at the processor pins.
3. All timings for the APIC I/O signals at the processor pins are referenced to the PICCLK rising
edge at 0.9 V. All APIC I/O signal timings are referenced at 1.0 V at the processor pins.
4. All timings for the TAP signals at the processor pins are referenced to the TCK rising edge at
1.0 V. All TAP signal timings (TMS, TDI, etc.) are referenced at 1.0 V at the processor pins.
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Intel® Pentium® III Processor with 512KB L2 Cache at 1.13GHz to 1.40GHz
Figure 9. Clock Waveform
V ih
BC LK
V c ro s s
BCLK#
V il
Tp
T p = T 1 ( B C L K P e r io d )
N O T E : S in g le - E n d e d c lo c k u s e s B C L K o n ly ,
D if f e r e n tia l c lo c k u s e s B L C K a n d B C L K #
Figure 10. BCLK/BCLK#, PICCLK, and TCK Generic Clock Waveform
Tp
Th
Vringback
(rise)
Vih diff
V2
0V
V3
V1
Vringback
(fall)
Vil diff
Tr
Tf
Th
Tl
Tp
V1
T5, T25, T34, (Rise Tim e)
Tf
Tl
Tr
T6, T26, T35, (Fall Tim e)
T3, T23, T32, (High Tim e)
T4, T24, T33, (Low Tim e)
T1, T22, T31 (BC LK, TCK, PIC CLK Period)
B CLK is referenced to 0.30V (D ifferential M ode), 0.50V (Single-Ended M ode)
TCK is referenced to Vref - 200 m V, PICC LK is referenced to 0.4V.
V2 = B CLK is refernced to 0.9V (Differental M ode), 2.0V (Single-E nded M ode)
TCK is referenced to Vref + 200 m V, PICC LK is refernced to 1.6V
V3 = B CLK and BLCK # crossing point of the rising edge of BLCK and the falling edge of BCLK# (Differential M ode),
BCLK i refereced to 1.25V (Single-Ended M ode), PIC CLK is reference to 1.0V, TCK is referenced to Vcm osref
Datasheet
=
=
=
=
=
=
37
Intel® Pentium® III Processor with 512KB L2 Cache at 1.13GHz to 1.40GHz
Figure 11. System Bus Valid Delay Timings
BCLK#
BCLK
Tx
Tx
Valid
V
Signal
Valid
Tpw
Tx = T7, T29a, T29b (Valid Delay)
NOTE: Single-Ended clock uses BCLK only,
Differential clock uses BCLK and BCLK#
Tpw = T14, T15 (Pulse Width)
V = Vref for AGTL signal group; Vcmosref for CMOS, APIC and TAP signal groups
Figure 12. System Bus Setup and Hold Timings
BCLK#
VCross
BCLK
Ts
V
Th
Valid
VCross = Crossing point of BLCK and BCLK#
Ts = T8, T27 (Setup Time)
NOTE: Single-Ended clock uses BCLK only,
Differential clock uses BCLK and BCLK#
Th = T9, T28 (Hold Time)
V = Vref for AGTL signal group; 0.75V for APIC and TAP signal groups
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Intel® Pentium® III Processor with 512KB L2 Cache at 1.13GHz to 1.40GHz
Figure 13. System Bus Reset and Configuration Timings
BCLK#
BCLK
T8
T9
RESET#
T10
Configuration
(A[14:5]#, BR0#,
BR1#, FLUSH#,
INT#)
T17
T16
Valid
T9 = (AGTL+ Input Hold Time)
NOTE: Single-Ended clock uses BCLK only,
T8 = (AGTL+ Input Setup Time) Differential clock uses BCLK and BCLK#
T10 = (RESET# Pulse Width)
T16 = (Reset Configuration Signals (A[14:5]#, BR0#, BR1#, FLUSH#, INIT#) Setup Tim
T17 = (Reset Configuration Signals (A[14:5]#, BR0#, BR1#, FLUSH#, INIT#) Hold Time)
Figure 14. Platform Power-On Sequence and Timings
Vtt, Vref
Vcmosref
VID
Valid
BSEL[1:0]
Valid
T45
VTT_PWRGD
VCC_Core
BCLK#
BCLK
PICCLK
T46
VCC_PWRGD
Configuration Inputs
Inactive
RESET#
Valid Config
Active
T47
THERMTRIP#
Valid
PICD[1:0]
Valid
AGTL Outputs
Valid
All other CMOS
Outputs
Valid
All other Inputs
Inactive
Active
T48
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39
Intel® Pentium® III Processor with 512KB L2 Cache at 1.13GHz to 1.40GHz
Figure 15. Power-On Reset and Configuration Timings
BCLK
Vcc CORE, VTT,
VREF
PWRGOOD
VIH, min
VIL, max
Ta
Tb
RESET#
TC
Configuration
(A20M#, IGNNE#,
INTR, NMI)
Valid Ratio
Ta
Tb
Tc
= T15 (PWRGOOD Inactive Pulse)
= T10 (RESET# Pulse Width)
= T20 (Reset Configuration Signals (A20M#, IGNNE#, LINT[1:0]) Hold Time)
765a
Figure 16. Test Timings (TAP Connection)
TCK
Tv
Tw
Tr
Ts
TDI, TMS
Input
Signal
Tx
Tu
Ty
Tz
TDO
Output
Signal
Tr = T43 (All Non-Test Inputs Setup Time)
Ts = T44 (All Non-Test Inputs Hold Time)
Tu = T40 (TDO Float Delay)
Tv = T37 (TDI, TMS Setup Time)
Tw = T38 (TDI, TMS Hold TIme)
Tx = T39 (TDO Valid Delay)
Ty = T41 (All Non-Test Outputs Valid Delay)
Tz = T42 (All Non-Test Outputs Float Time)
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Intel® Pentium® III Processor with 512KB L2 Cache at 1.13GHz to 1.40GHz
Figure 17. Test Reset Timings
TRST#
1.00V
T36
T36 = TRST# Pulse Width
Datasheet
41
Intel® Pentium® III Processor with 512KB L2 Cache at 1.13GHz to 1.40GHz
3.0
Signal Quality Specifications
Signals driven on the processor system bus should meet signal quality specifications to ensure that
the components read data properly and to ensure that incoming signals do not affect the long term
reliability of the component. Specifications are provided for simulation at the processor pins.
Meeting the specifications at the processor pins in Table 22, Table 23, and Table 26 ensures that
signal quality effects will not adversely affect processor operation.
3.1
BCLK/BCLK# & PICCLK Signal Quality Specifications and
Measurement Guidelines
Table 23 describes the signal quality specifications at the processor pins for the processor system
bus clock (BCLK/BCLK#) and APIC clock (PICCLK) signals. References made to BCLK signal
quality specifications also applies to BCLK#. Figure 18 describes the signal quality waveform for
the system bus clock at the processor pins.
Table 22. BCLK (Single-Ended Clock Mode) Signal Quality Specifications for Simulation at
the Processor Pins1
T# Parameter
Min
Nom
V1: BCLK VIL
V2: BCLK VIH
2.2
V3: BCLK Absolute Voltage Range
-0.5
V4: BCLK Rising Edge Ringback
2.0
Max
Unit
Figure
0.3
V
18
V
18
V
18
V
18
2
V
18
2
3.1
V5: BCLK Falling Edge Ringback
0.5
Notes
Table 23. BCLK/BCLK# (Differential Clock Mode) and PICCLK Signal Quality Specifications
for Simulation at the Processor Pins 1
T# Parameter
V1: BCLK VIL
Min
-0.2
V1: PICCLK VIL
Nom
Max
Unit
Figure
0.35
V
18
0.40
V
18
1.45
V
18
V
18
Notes
V2: BCLK VIH
0.92
V2 PICCLK VIH
1.60
V3: BCLK Absolute Voltage Range
-0.2
1.45
V
18
V3: PICCLK Absolute Voltage
Range
-0.4
2.4
V
18
V4: BCLK Rising Edge Ringback
0.35
V
18
2
V4: PICCLK Rising Edge Ringback
1.60
V
18
2
V5: BCLK Falling Edge Ringback
-0.35
V
18
2
V5: PICCLK Falling Edge Ringback
0.40
V
18
2
NOTES:
1. Unless otherwise noted, all specifications in this table apply to Intel® Pentium® III processors with 512KB L2
cache at all frequencies.
2. The rising and falling edge ringback voltage specified is the minimum (rising) or maximum (falling) absolute
voltage the BCLK/BCLK# and PICCLK signals can dip back to after passing the VIH (rising) or VIL (falling)
voltage limits. This specification is an absolute value.
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Intel® Pentium® III Processor with 512KB L2 Cache at 1.13GHz to 1.40GHz
Figure 18. BCLK/BCLK#, PICCLK Generic Clock Waveform at the Processor Pins
V3
V4
V2
V1
V5
V3
3.2
AGTL Signal Quality Specifications and Measurement
Guidelines
Many scenarios have been simulated to generate a set of AGTL layout guidelines which are
available in the appropriate platform design guide. Refer to the Intel® Pentium® II Processor
Developer's Manual (Order Number 243502) for the AGTL buffer specification.
Table 24 provides the AGTL signal quality specifications for the processor for use in simulating
signal quality at the processor pins.
The Intel® Pentium® III processor with 512KB L2 Cache maximum allowable overshoot and
undershoot specifications for a given duration of time are detailed in Table 23 through Table 25.
Figure 19 shows the AGTL ringback tolerance and Figure 20 shows the overshoot/undershoot
waveform.
Table 24. AGTL Signal Groups Ringback Tolerance Specifications at the Processor
Pins 1, 2, 3
T# Parameter
Min
Unit
Figure
Notes
α: Overshoot
100
mV
19
τ: Minimum Time at High
0.50
ns
19
ρ: Amplitude of Ringback
±200
mV
19
5, 6, 7, 8
φ: Final Settling Voltage
200
mV
19
8
δ: Duration of Squarewave Ringback
N/A
ns
19
4, 8
NOTES:
1. Unless otherwise noted, all specifications in this table apply to Intel® Pentium® III processors with 512KB L2
cache at all frequencies.
2. Specifications are for the edge rate of 0.3 - 3V/ns. See Figure 19 for the generic waveform.
3. All values specified by design characterization.
4. Please see Table 23 for maximum allowable overshoot.
5. Ringback between VREF + 100 mV and VREF + 200 mV or VREF - 300 mV and VREF - 100 mVs requires the
flight time measurements to be adjusted as described in the Intel AGTL Specifications. Ringback below VREF
+ 100 mV or above VREF - 100 mV is not supported.
6. Intel recommends simulations not exceed a ringback value of VREF ±200 mV to allow margin for other
sources of system noise.
Datasheet
43
Intel® Pentium® III Processor with 512KB L2 Cache at 1.13GHz to 1.40GHz
7. A negative value for ρ indicates that the amplitude of ringback is above VREF. (i.e., φ = -100 mV specifies the
signal cannot ringback below VREF + 100 mV).
8. φ and ρ: are measured relative to VREF. α: is measured relative to VREF + 200 mV.
Figure 19. Low to High AGTL Receiver Ringback Tolerance
τ
α
VREF + 0.2
φ
VREF
ρ
VREF - 0.2
δ
0.7V Clk Ref
Vstart
Clock
Time
Note: High to low case is analogous
3.3
AGTL Signal Quality Specifications and Measurement
Guidelines
3.3.1
Overshoot/Undershoot Guidelines
Overshoot (or undershoot) is the absolute value of the maximum voltage above the nominal high
voltage or below VSS. The overshoot guideline limits transitions beyond VCC or VSS due to the fast
signal edge rates. The processor can be damaged by repeated overshoot events on 1.25 V or 2.5 V
tolerant buffers if the charge is large enough (i.e., if the overshoot is great enough). Determining
the impact of an overshoot/undershoot condition requires knowledge of the magnitude, the pulse
direction and the activity factor (AF). Permanent damage to the processor is the likely result of
excessive overshoot/undershoot. Violating the overshoot/undershoot guideline will also make
satisfying the ringback specification difficult.
When performing simulations to determine impact of overshoot and undershoot, ESD diodes must
be properly characterized. ESD protection diodes do not act as voltage clamps and will not provide
overshoot or undershoot protection. ESD diodes modeled within Intel I/O buffer models do not
clamp undershoot or overshoot and will yield correct simulation results. If other I/O buffer models
are being used to characterize the Intel® Pentium® III processor with 512KB L2 Cache
performance, care must be taken to ensure that ESD models do not clamp extreme voltage levels.
Intel I/O buffer models also contain I/O capacitance characterization. Therefore, removing the ESD
diodes from an I/O buffer model will impact results and may yield excessive overshoot/undershoot.
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Intel® Pentium® III Processor with 512KB L2 Cache at 1.13GHz to 1.40GHz
3.3.2
Overshoot/Undershoot Magnitude
Magnitude describes the maximum potential difference between a signal and its voltage reference
level, VSS (overshoot) and VTT (undershoot). While overshoot can be measured relative to VSS
using one probe (probe to signal and GND lead to VSS), undershoot must be measured relative to
VTT. This could be accomplished by simultaneously measuring the VTT plane while measuring the
signal undershoot. Today’s oscilloscopes can easily calculate the true undershoot waveform. The
true undershoot waveform can also be obtained with the following oscilloscope data file analysis:
Converted Undershoot Waveform = VTT - Signal_measured
Note:
The converted undershoot waveform appears as a positive (overshoot) signal.
Note:
Overshoot (rising edge) and undershoot (falling edge) conditions are separate and their impact
must be determined independently.
After the true waveform conversion, the undershoot/overshoot specifications shown in Table 25
through Table 28 can be applied to the converted undershoot waveform using the same magnitude
and pulse duration specifications used with an overshoot waveform.
Overshoot/undershoot magnitude levels must observe the Absolute Maximum Specifications listed
in Table 25 through Table 28. These specifications must not be violated at any time regardless of
bus activity or system state. Within these specifications are threshold levels that define different
allowed pulse durations. Provided that the magnitude of the overshoot/undershoot is within the
Absolute Maximum Specifications (1.78V AGTL, 2.08V CMOS), the pulse magnitude, duration
and activity factor must all be used to determine if the overshoot/undershoot pulse is within
specifications.
3.3.3
Overshoot/Undershoot Pulse Duration
Pulse duration describes the total time an overshoot/undershoot event exceeds the overshoot/
undershoot reference voltage (Vos_ref = 1.32V AGTL, 1.80V CMOS). The total time could
encompass several oscillations above the reference voltage. Multiple overshoot/undershoot pulses
within a single overshoot/undershoot event may need to be measured to determine the total pulse
duration.
Note:
Oscillations below the reference voltage can not be subtracted from the total overshoot/undershoot
pulse duration.
Note:
Multiple Overshoot/Undershoot events occurring within the same clock cycle must be considered
together as one event. Using the worst case Overshoot/Undershoot Magnitude, sum together the
individual Pulse Durations to determine the total Overshoot/Undershoot Pulse Duration for that
total event.
3.3.4
Activity Factor
Activity Factor (AF) describes the frequency of overshoot (or undershoot) occurrence relative to a
clock. Since the highest frequency of assertion of an AGTL or a CMOS signal is every other clock,
an AF = 1 indicates that the specific overshoot (or undershoot) waveform occurs EVERY OTHER
clock cycle. Thus, an AF = 0.01 indicates that the specific overshoot (or undershoot) waveform
occurs one time in every 200 clock cycles.
The specifications provided in Table 25 through Table 28 show the Maximum Pulse Duration
allowed for a given Overshoot/Undershoot Magnitude at a specific Activity Factor. Each Table
entry is independent of all others, meaning that the Pulse Duration reflects the existence of
overshoot/undershoot events of that magnitude ONLY. A platform with an overshoot/undershoot
Datasheet
45
Intel® Pentium® III Processor with 512KB L2 Cache at 1.13GHz to 1.40GHz
that just meets the pulse duration for a specific magnitude where the AF < 1, means that there can
be NO other overshoot/undershoot events, even of lesser magnitude (note that if AF = 1, then the
event occurs at all times and no other events can occur).
3.3.5
Note:
Activity factor for AGTL signals is referenced to system bus clock frequency.
Note:
Activity factor for CMOS signals is referenced to PICCLK frequency.
Reading Overshoot/Undershoot Specification Tables
The overshoot/undershoot specification for the Intel® Pentium® III processor with 512KB L2
cache is not a simple single value. Instead, many factors are needed to determine what the over/
undershoot specification is. In addition to the magnitude of the overshoot, the following parameters
must also be known: the case temperature the processor will be operating at, the width of the
overshoot (as measured above 1.78 V) and the Activity Factor (AF). To determine the allowed
overshoot for a particular overshoot event, the following must be done:
1. Determine the signal group that particular signal falls into. If the signal is an AGTL signal
operating with a 133 MHz system bus, use Table 26 (133 MHz AGTL signal group). If the
signal is a CMOS signal, use Table 28 (33 MHz CMOS signal group).
2. Determine the maximum case temperature (Tcase) for the range of processors that the system
will support.
3. Determine the Magnitude of the overshoot (relative to VSS)
4. Determine the Activity Factor (how often this overshoot occurs?)
5. From the appropriate Specification table, read off the Maximum Pulse Duration (in ns)
allowed.
6. Compare the specified Maximum Pulse Duration to the signal being measured. If the Pulse
Duration measured is less than the Pulse Duration shown in the table, then the signal meets the
specifications.
The above procedure is similar for undershoots after the undershoot waveform has been converted
to look like an overshoot. Undershoot events must be analyzed separately from Overshoot events
as they are mutually exclusive.
Below is an example showing how the maximum pulse duration is determined for a given
waveform.
Table 25. Example Platform Information
Required Information
FSB Signal Group
Maximum Platform Support
133 MHz AGTL
Max Tcase
69 °C
Overshoot Magnitude
1.78 V
Activity Factor (AF)
Notes
0.1
Measured Value
Measured overshoot occurs on
average every 20 clocks
Given the above parameters, and using Table 26 (69oC/AF = 0.1 column) the maximum allowed
pulse duration is 7.5 ns. Since the measure pulse duration is 7.5 ns, this particular overshoot event
passes the overshoot specifications, although this doesn't guarantee that the combined overshoot/
undershoot events meet the specifications.
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Intel® Pentium® III Processor with 512KB L2 Cache at 1.13GHz to 1.40GHz
3.3.6
Determining if a System Meets the Overshoot/Undershoot
Specifications
The overshoot/undershoot specifications listed in the following tables specify the allowable
overshoot/undershoot for a single overshoot/undershoot event. However most systems will have
multiple overshoot and/or undershoot events that each have their own set of parameters (duration,
AF and magnitude). While each overshoot on its own may meet the overshoot specification, when
you add the total impact of all overshoot events, the system may fail. A guideline to ensure a
system passes the overshoot and undershoot specifications is shown below. It is important to meet
these guidelines; otherwise, contact your Intel field representative.
1. Ensure no AGTL signal ever exceeds 1.78V and no CMOS signal ever exceeds 2.08V.
OR
2. If only one overshoot/undershoot event magnitude occurs, ensure it meets the over/undershoot
specifications in the following tables
OR
3. If multiple overshoots and/or multiple undershoots occur, measure the worst case pulse
duration for each magnitude and compare the results against the AF = 1 specifications. If all of
these worst case overshoot or undershoot events meet the specifications (measured time <
specifications) in the table (where AF=1), then the system passes.
The following notes apply to Table 25 through Table 28.
NOTES:
1. Overshoot/Undershoot Magnitude = 1.78V(AGTL), 2.08V(CMOS) is an absolute value and
should never be exceeded
2. Overshoot is measured relative to VSS.
3. Undershoot is measured relative to VTT
4. Overshoot/Undershoot Pulse Duration is measured relative to 1.32V for AGTL and 1.80V for
CMOS.
5. Rinbacks below VTT can not be subtracted from Overshoots/Undershoots
6. Lesser Undershoot does not allocate longer or larger Overshoot
7. OEM's are encouraged to follow Intel provided layout guidelines. Consult the layout guidelines
provided in the specific platform design guide.
8. All values specified by design characterization
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Intel® Pentium® III Processor with 512KB L2 Cache at 1.13GHz to 1.40GHz
Table 26. 133 MHz AGTL Signal Group Overshoot/Undershoot Tolerance 1, 2, 3
Maximum Pulse Duration at
Tcase = 60 °C (ns)
Overshoot/Undershoot
Magnitude (V)
Maximum Pulse Duration at
Tcase = 69 °C (ns)
AF = 0.01
AF = 0.1
AF = 1
AF = 0.01
AF = 0.1
AF = 1
1.78
15
1.5
0.153
8.7
0.87
0.087
1.73
15
3.1
0.31
15
2.0
0.20
1.68
15
6.8
0.68
15
4.6
0.46
1.63
15
14
1.42
15
10
1.0
1.58
15
15
2.95
15
15
2.3
1.53
15
15
6.2
15
15
5.0
1.48
15
15
13.2
15
15
15
Notes: 1. Measurements taken at the processor socket pins on the solder-side of the motherboard.
2. Overshoot/Undershoot Magnitude = 1.78V is an absolute value and should never be exceeded.
3. BCLK Period = 7.5nS.
Figure 20. Maximum Acceptable AGTL Overshoot/Undershoot Waveform
Time dependent Overshoot
.1ns
.3ns
1.78V Max
1.62V
1.47V
1.32V
1ns
α
β
χ
Vos_ref
α
β
χ
Vss
-.15V
-.30V
-.46V Min
.1ns
.3ns
1ns
Time dependent Undershoot
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Intel® Pentium® III Processor with 512KB L2 Cache at 1.13GHz to 1.40GHz
3.4
Non-AGTL Signal Quality Specifications and Measurement
Guidelines
There are three signal quality parameters defined for non-AGTL signals: overshoot/undershoot,
ringback, and settling limit. All three signal quality parameters are shown in Figure 21 for the nonAGTL signal group.
Figure 21. Non-AGTL Overshoot/Undershoot, Settling Limit, and Ringback 1
Settling Limit
Overshoot
VHI
Rising-Edge
Ringback
Falling-Edge
Ringback
Settling Limit
VLO
VSS
Time
Undershoot
NOTE:
1. VHI = 1.80 V for all non-AGTL signals except for BCLK, PICCLK, and PWRGOOD. VHI =2.0 V for PICCLK,
and VHI =1.8 V for PWRGOOD. BCLK and PICCLK signal quality is detailed in Section 3.1.
3.4.1
Overshoot/Undershoot Guidelines
Overshoot (or undershoot) is the absolute value of the maximum voltage above the nominal high
voltage or below VSS. The overshoot guideline limits transitions beyond VCC or VSS due to the fast
signal edge rates (see Figure 21 for non-AGTL signals). The processor can be damaged by repeated
overshoot events on 1.25V or 1.8V tolerant buffers if the charge is large enough (i.e., if the
overshoot is great enough). Permanent damage to the processor is the likely result of excessive
overshoot/undershoot. Violating the overshoot/undershoot guideline will also make satisfying the
ringback specification difficult. The overshoot/undershoot guideline is 0.3V and assumes the
absence of diodes on the input. These guidelines should be verified in simulations without the onchip ESD protection diodes present because the diodes will begin clamping the 1.25V and 2.5V
tolerant signals beginning at approximately 0.7V above the appropriate supply and 0.7V below
VSS. If signals are not reaching the clamping voltage, this will not be an issue. A system should not
rely on the diodes for overshoot/undershoot protection as this will negatively affect the life of the
components and make meeting the ringback specification very difficult.
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Intel® Pentium® III Processor with 512KB L2 Cache at 1.13GHz to 1.40GHz
Table 27. 33 MHz CMOS Signal Group Overshoot/Undershoot Tolerance
Overshoot/Undershoot
Magnitude (V)
Note:
3.4.2
Maximum Pulse Duration at
Tcase = 69 °C (ns)
AF = 0.01
AF = 0.1
AF = 1
2.38
35
3.5
0.35
2.33
60
8.0
0.8
2.28
60
18
1.8
2.23
60
41
4.1
2.18
60
60
9.0
2.13
60
60
21
2.08
60
60
60
The undershoot guideline limits transitions exactly as described for the AGTL signals. See
Figure 20.
Ringback Specification
Ringback refers to the amount of reflection seen after a signal has switched. The ringback
specification is the voltage that the signal rings back to after achieving its maximum absolute
value. See Figure 21 for an illustration of ringback. Excessive ringback can cause false signal
detection or extend the propagation delay. The ringback specification applies to the input pin of
each receiving agent. Violations of the signal ringback specification are not allowed under any
circumstances for non-AGTL signals.
Ringback can be simulated with or without the input protection diodes that can be added to the
input buffer model. However, signals that reach the clamping voltage should be evaluated further.
See Table 28 for the signal ringback specifications for non-AGTL signals for simulations at the
processor pins.
Table 28. Signal Ringback Specifications for Non-AGTL Signal Simulation at the Processor
Pins 1
Transition
Maximum Ringback
(with Input Diodes Present)
Unit
Figure
2
0→1
Vcmos_ref + 0.200
V
21
Non-AGTL Signals 2
1→0
Vcmos_ref - 0.300
V
21
PWRGOOD
0→1
1.44
V
21
Input Signal Group
Non-AGTL Signals
NOTES:
1. Unless otherwise noted, all specifications in this table apply to Intel® Pentium® III processors with 512KB L2
cache at all frequencies.
2. Non-AGTL signals except PWRGOOD.
3.4.3
Settling Limit Guideline
Settling limit defines the maximum amount of ringing at the receiving pin that a signal must reach
before its next transition. The amount allowed is 10% of the total signal swing (VHI –VLO) above
and below its final value. A signal should be within the settling limits of its final value, when either
in its high state or low state, before it transitions again.
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Signals that are not within their settling limit before transitioning are at risk of unwanted
oscillations which could jeopardize signal integrity. Simulations to verify settling limit may be
done either with or without the input protection diodes present. Violation of the settling limit
guideline is acceptable if simulations of 5 to 10 successive transitions do not show the amplitude of
the ringing increasing in the subsequent transitions.
Datasheet
51
Intel® Pentium® III Processor with 512KB L2 Cache at 1.13GHz to 1.40GHz
4.0
Thermal Specifications and Design Considerations
This chapter provides needed data for designing a thermal solution. However, for the correct
thermal measuring processes, refer to Intel® Pentium® III Processors in the FC-PGA2 Package
Thermal Design Guide (Order Number 249660). The Intel® Pentium® III processor with 512KB
L2 Cache uses flip chip pin grid array packaging technology with a Integrated Heat Spreader and
has a case temperature (Tcase) specified.
4.1
Thermal Specifications
Table 29 provides the thermal design power dissipation and maximum temperatures for the Intel®
Pentium® III processor with 512KB L2 Cache. Systems should design for the highest possible
processor power, even if a processor with a lower thermal dissipation is planned. A thermal
solution should be designed to ensure the case temperature never exceeds these specifications.
Table 29. Intel® Pentium® III processor with 512KB L2 Cache Thermal Design
Power 1
Processor
Processor
Core
Frequency
(GHz)
L2 Cache
Size
(Kbytes)
Processor
Power 2
(W)
Maximum
TCASE (°C)
1.13
1.13
512
27.9
69
1.26
1.26
512
29.5
69
1.40
1.40
512
31.2
69
1. These values are specified at nominal VCCCORE for the processor pins.
2. Processor power includes the power dissipated by the processor core, the L2 cache, and the AGTL bus
termination. The maximum power for each of these components does not occur simultaneously.
3. Processor core power includes only the power dissipated by the core die.
4.1.1
THERMTRIP# Requirement
In the event the processor drives the THERMTRIP# signal active during valid operation, both the
Vcc and Vtt supplies to the processor must be turned off to prevent thermal runaway of the
processor. Valid operation refers to the operating conditions where the THERMTRIP# signal is
guaranteed valid. The time required from THERMTRIP# asserted to Vcc rail at 1/2 nominal is 5S
and THERMTRIP# asserted to Vtt rail at 1/2 nominal is 5S.
Table 30. THERMTRIP# Time Requirement
Power Rail
Power Target
Time required for power drop
VCC
1/2 Nominal VCC
5 seconds
VTT
1/2 Nominal VTT
5 seconds
NOTE: Once Vcc and Vtt supplies are turned off the THERMTRIP# signal will be deactivated. System logic
should ensure no “unsafe” power cycling occurs due to this deassertion.
52
Datasheet
Intel® Pentium® III Processor with 512KB L2 Cache at 1.13GHz to 1.40GHz
4.1.2
Thermal Diode
The Intel® Pentium® III processor with 512KB L2 Cache incorporates an on-die diode that may be
used to monitor the die temperature (junction temperature). A thermal sensor located on the
motherboard, or a stand-alone measurement kit, may monitor the die temperature of the processor
for thermal management or instrumentation purposes. Table 31 and Table 32 provide the diode
parameter and interface specifications.
The Intel® Pentium® III processor with 512KB L2 Cache uses an Integrated Heat Spreader (IHS)
and has a case temperature requirement. Please see the Intel® Pentium® III Processors in the FCPGA2 Package Thermal Design Guide document for details on measuring the case temperature.
The thermal diode should be used for system thermal management and not determining spec
compliance.
Table 31. Thermal Diode Parameters1
Symbol
Parameter
Min
Typ
Max
Unit
Ifw
Forward Bias Current
5
N/A
150
µA
n
Diode Ideality Factor
1.001452
1.007152
1.012852
Ifw
Forward Bias Current
5
N/A
300
n
Diode Ideality Factor
1.000807
1.009528
1.018249
Notes
1
2, 4, 5
µA
1
3, 4, 5
NOTES:
1. Intel does not support or recommend operation of the thermal diode under reverse bias.
2. Characterized at 75° C with a forward bias current of 5 - 150 µA.
3. Characterized at 75° C with a forward bias current of 5 - 300 µA.
4. The ideality factor, n, represents the deviation from ideal diode behavior as exemplified by the diode
equation:
Ifw=Is(e^ ((Vd*q)/(nkT)) - 1), where Is = saturation current, q = electronic charge, Vd = voltage across the
diode, k = Boltzmann Constant, and T = absolute temperature (Kelvin).
5. Not 100% tested. Specified by design characterization.
Table 32. Thermal Diode Interface
Pin Name
4.2
PGA370 Socket pin #
Pin Description
THERMDP
AL31
diode anode (p_junction)
THERMDN
AL29
diode cathode (n_junction)
Thermal Metrology
The thermal metrology for the Intel® Pentium® III processor in the FC-PGA2 package should be
followed to evaluate the thermal performance of proposed cooling solutions. The thermal
metrology is contained in the Intel® Pentium® III Processors in the FC-PGA2 Package Thermal
Design Guide.
Datasheet
53
Intel® Pentium® III Processor with 512KB L2 Cache at 1.13GHz to 1.40GHz
5.0
Mechanical Specifications
The Intel® Pentium® III processor with 512KB L2 Cache uses a FC-PGA2 package technology.
Mechanical specifications for the processor are given in this section. See Section 1.1.1 for a
complete terminology listing.
The processor utilizes a PGA370 socket for installation into the motherboard. Details on the socket
are available in the 370-Pin Socket (PGA370) Design Guidelines.
Note:
For Figure 22, the following apply:
1. Unless otherwise specified, the following drawings are dimensioned in inches.
2. All dimensions provided with tolerances are guaranteed to be met for all normal production
product.
3. Figures and drawings labeled as “Reference Dimensions” are provided for informational
purposes only. Reference dimensions are extracted from the mechanical design database and
are nominal dimensions with no tolerance information applied. Reference dimensions are
NOT checked as part of the processor manufacturing. Unless noted as such, dimensions in
parentheses without tolerances are reference dimensions.
4. Drawings are not to scale.
5.1
FC-PGA2 Mechanical Specifications
The following figure with package dimensions is provided to aid in the design of heatsink and clip
solutions as well as demonstrate where pin-side capacitors will be located on the processor.
Table 33 includes the measurements for these dimensions in both inches and millimeters.
54
Datasheet
Intel® Pentium® III Processor with 512KB L2 Cache at 1.13GHz to 1.40GHz
Figure 22. Package Dimensions
Datasheet
55
Intel® Pentium® III Processor with 512KB L2 Cache at 1.13GHz to 1.40GHz
Table 33. Intel® Pentium® III processor with 512KB L2 Cache Package Dimensions
Millimeters
Inches
Symbol
A1
Minimum
Maximum
2.266
2.690
Notes
Minimum
Maximum
0.089
0.106
A2
0.980
1.180
0.038
0.047
B1
30.800
31.200
1.212
1.229
B2
30.800
31.200
1.212
1.229
C1
C2
33.000 max
1.299 max
33.000 max
1.299 max
D
49.428
49.632
1.946
1.954
D1
45.466
45.974
1.790
1.810
G1
0.000
17.780
0.000
0.700
G2
0.000
17.780
0.000
0.700
G3
0.000
0.889
0.000
0.035
H
L
ΦP
Pin TP
2.540
Nominal
3.048
3.302
0.431
0.483
Notes
0.508 Diametric True Position (Pin-to-Pin)
0.100
Nominal
0.120
0.130
0.017
0.019
0.020 Diametric True Position (Pin-to-Pin)
NOTE: Capacitors will be placed on the pin-side of the FC-PGA2 package in the area defined by G1, G2, and
G3. This area is a keepout zone for motherboard designers.
For Table 34, the following apply:
1. It is not recommended to use any portion of the processor substrate as a mechanical reference
or load bearing surface for thermal solutions.
2. Parameters assume uniformly applied loads
Table 34. Processor Case Loading Parameters
Dynamic (max)1
Static (max)2,3
Unit
IHS Surface
200
100
lbf
IHS Edge
125
N/A
lbf
IHS Corner
75
N/A
Ibf
Parameter
NOTES:
1. This specification applies to a uniform and a non-uniform load.
2. This is the maximum static force that can be applied by the heatsink and clip to maintain the heatsink and
processor interface.
3. Please see socket manufacturer’s force loading specification also to ensure compliance. Maximum static
loading listed here does not account for the maximum reaction forces on the socket tabs or pins.
56
Datasheet
Intel® Pentium® III Processor with 512KB L2 Cache at 1.13GHz to 1.40GHz
Figure 23. FC-PGA2 IHS Flatness Specification
Note: Flatness specifications in millimeters
5.2
Recommended Mechanical Keep-Out Zones
Figure 24. Volumetric Keep-Out
Datasheet
57
Intel® Pentium® III Processor with 512KB L2 Cache at 1.13GHz to 1.40GHz
Figure 25. Component Keep-Out
5.3
Processor Markings
The following figure exemplifies the processor top-side markings and it is provided to aid in the
identification of an Intel® Pentium® III processor with 512KB L2 Cache. Table 33 lists the
measurements for the package dimensions.
Figure 26. Top Side Processor Markings
GRP1LN1
GRP1LN2
GRP2LN1
GRP2LN2
Production
GRP1LN1: Intel'01 (m)(c)_-_{COO}
GRP1LN2: {FPO}-{S/N}
GRP2LN1: {core freq}/{cache size}/{FSB}/{VID}
GRP2LN2: {S-spec here}
58
Datasheet
Intel® Pentium® III Processor with 512KB L2 Cache at 1.13GHz to 1.40GHz
5.4
Processor Signal Listing
Table 35 and Table 36 provide the processor pin definitions. The signal locations on the PGA370
socket are to be used for signal routing, simulation, and component placement on the baseboard.
Figure 27 provides a pin-side view of the Intel® Pentium® III processor with 512KB L2 Cache
pin-out.
Figure 27. Intel® Pentium® III processor with 512KB L2 Cache Pinout
1
3
5
2
7
4
9
6
11
8
13
10
15
12
17
14
19
16
18
21
20
23
25
22
27
24
29
26
31
28
33
30
35
32
37
34
36
AN
AN
DYN_OE
A16
A12
A6
VTT
VTT
AP1
BPRI
DEFER
VTT
RP
TRDY
DRDY
BR0
ADS
TRST
TDI
TDO
AM
AM
KEY
VCC
VSS
VCC
VSS
VCC
VSS
VSS
VCC
VCC
VCC
VSS
VSS
VCC
VCC
VSS
VSS
VID1
AL
AK
AL
VSS
RSV
A15
A13
A9
VTT
AP0
A7
REQ4
REQ3
VTT
HITM
HIT
DBSY
THRMDN
THRMDP
TCK
VID0
VID2
AK
VCC
VttPWRGD
A28
A3
VREF6
A11
A14
VTT
REQ0
CMOSREF
LOCK
AERR
RS2
PWRGD
AJ
RESET2#
A21
VCC
VSS
VCC
VSS
VCC
VSS
VCC
VSS
VCC
VSS
VCC
VSS
TMS
RSV
VCC
BSEL1
VCC
BSEL0
VID25m
V
SMI
VID3
AH
AH
RESET
VSS
A10
A5
A8
A4
BNR
REQ1
REQ2
VTT
RS1
VCC
RS0
A19
VTT
SLP
THERM
AG
VCC
VSS
VSS
VCC
AG
TRIP
INIT
STPCLK
AF
VCC
VSS
A25
A35
IGNNE
AF
DETECT
VCC
AE
AE
A17
A22
VCC
A20M
AD
VSS
A31
FLUSH
AD
VCC
VREF5
IERR
VSS
VTT
AC
AC
A33
A20
VSS
FERR
VSS
RSP
AB
AB
A24
VCC
A23
VSS
VCC
VTT
AA
AA
A27
A30
VTT
VCC
VTT
VCC
Z
Z
VSS
A29
A18
VCC
Y
RSV
A26
BR1
RSV
VSS
Y
BCLK#/
CLKREF
VSS
X
VSS
A32
VSS
VSS
VCC
X
VTT
VSS
W
W
D0
VCC
A34
PLL1
RSV
BCLK
V
V
VSS
BERR
VREF4
D4
D15
VSS
T
VCC
VCC
Pin Side View
U
VCC
VTT
VTT
VSS
VCC
VSS
S
D8
D5
R
VCC
J
VREF3
D18
D14
VCC
D3
H
VSS
VCC
VSS
L
PICD1
LINT1
K
D24
VCC
VCC
PICCLK
VCC
D19
VSS
PREQ
PICD0
VSS
J
H
VCC
D23
VSS
BP2
VTT
VTT
F
F
VCC
D26
VCC
D25
D32
VCC
D22
VSS
D27
RSV
VCC
VSS
VCC
VCC
D63
VSS
VREF1
VCC
VSS
VSS
VCC
RSV
VSS
VTT
VCC
D62
D
VSS
D33
VSS
VCC
VCC
D31
D38
D34
D39
D36
D42
D45
D41
D49
D52
D40
VSS
D59
B
D35
VSS
VCC
VSS
A
D29
1
D28
3
2
Datasheet
N
G
D21
C
Q
M
LINT0
G
E
R
P
NCHCTRL
RSV
RSV
VCC
D16
RSV
VSS
VCC
VSS
D30
RSV
RSV
VREF2
D7
VSS
D9
D20
RTT
VTT
CTRL
VSS
VCC
RSV
VCC
D11
D13
VCC
VSS
VSS
K
VTT
D17
D10
D2
M
L
VCC
RSV
D12
P
N
U
T
D6
D1
VSS
PLL2
S
Q
AJ
7
6
D44
9
8
VSS
VCC
D55
D54
VCC
D58
VSS
VSS
VCC
VSS
SLEW
DEP6
DEP4 VREF0
BPM1
BP3
CTRL
VCC
VSS
VCC
VSS
VCC
D50
D56
DEP5
DEP1
DEP0
E
D
C
BPM0
CPUPRES
B
VCC
VSS
VSS
VCC
VSS
VCC
VSS
VCC
VSS
VCC
VSS
VCC
BINIT
A
D37
D43
5
4
VCC
VCC
VSS
D51
11
10
D47
13
12
D48
15
14
D57
17
16
D46
19
18
21
20
D60
D53
23
22
D61
25
24
DEP7
27
26
DEP3
29
28
DEP2
31
30
33
32
PRDY
VSS
35
34
37
36
59
Intel® Pentium® III Processor with 512KB L2 Cache at 1.13GHz to 1.40GHz
Table 35. Signal Listing in Order by
Signal Name
Pin
No.
60
Pin Name
Signal Group
Table 35. Signal Listing in Order by
Signal Name (Continued)
Pin
No.
Pin Name
Signal Group
AH6
A10#
AGTL I/O
V4
BERR#
AGTL I/O
AK10
A11#
AGTL I/O
B36
BINIT#
AGTL I/O
AN5
A12#
AGTL I/O
AH14
BNR#
AGTL I/O
AL7
A13#
AGTL I/O
G33
BP2#
AGTL I/O
AK14
A14#
AGTL I/O
E37
BP3#
AGTL I/O
AL5
A15#
AGTL I/O
C35
BPM0#
AGTL I/O
AN7
A16#
AGTL I/O
E35
BPM1#
AGTL I/O
AE1
A17#
AGTL I/O
AN17
BPRI#
AGTL Input
Z6
A18#
AGTL I/O
AN29
BR0#
AGTL I/O
AG3
A19#
AGTL I/O
X2
BR1#
AGTL I/O
AC3
A20#
AGTL I/O
AJ33
BSEL0
3.3V Output
AE33
A20M#
CMOS Input
AJ31
BSEL1
3.3V Output
AJ1
A21#
AGTL I/O
C37
CPUPRES#
Power/Other
AE3
A22#
AGTL I/O
W1
D0#
AGTL I/O
AB6
A23#
AGTL I/O
T4
D1#
AGTL I/O
AB4
A24#
AGTL I/O
Q3
D10#
AGTL I/O
AF6
A25#
AGTL I/O
M4
D11#
AGTL I/O
Y3
A26#
AGTL I/O
Q1
D12#
AGTL I/O
AA1
A27#
AGTL I/O
L1
D13#
AGTL I/O
AK6
A28#
AGTL I/O
N3
D14#
AGTL I/O
Z4
A29#
AGTL I/O
U3
D15#
AGTL I/O
AK8
A3#
AGTL I/O
H4
D16#
AGTL I/O
AA3
A30#
AGTL I/O
R4
D17#
AGTL I/O
AD4
A31#
AGTL I/O
P4
D18#
AGTL I/O
X6
A32#
AGTL I/O
H6
D19#
AGTL I/O
AC1
A33#
AGTL I/O
N1
D2#
AGTL I/O
W3
A34#
AGTL I/O
L3
D20#
AGTL I/O
AF4
A35#
AGTL I/O
G1
D21#
AGTL I/O
AH12
A4#
AGTL I/O
F8
D22#
AGTL I/O
AH8
A5#
AGTL I/O
G3
D23#
AGTL I/O
AN9
A6#
AGTL I/O
K6
D24#
AGTL I/O
AL15
A7#
AGTL I/O
E3
D25#
AGTL I/O
AH10
A8#
AGTL I/O
E1
D26#
AGTL I/O
AL9
A9#
AGTL I/O
F12
D27#
AGTL I/O
AN31
ADS#
AGTL I/O
A5
D28#
AGTL I/O
AK24
AERR#
AGTL I/O
A3
D29#
AGTL I/O
AL11
AP0#
AGTL I/O
M6
D3#
AGTL I/O
AN13
AP1#
AGTL I/O
J3
D30#
AGTL I/O
W37
BCLK
System Bus Clock
C5
D31#
AGTL I/O
Y33
BCLK#/CLKREF
System Bus Clock
F6
D32#
AGTL I/O
Datasheet
Intel® Pentium® III Processor with 512KB L2 Cache at 1.13GHz to 1.40GHz
Table 35. Signal Listing in Order by
Signal Name (Continued)
Pin
No.
C1
Datasheet
Pin Name
D33#
Signal Group
Table 35. Signal Listing in Order by
Signal Name (Continued)
Pin
No.
Pin Name
Signal Group
AGTL I/O
C31
DEP1#
AGTL I/O
C7
D34#
AGTL I/O
A33
DEP2#
AGTL I/O
B2
D35#
AGTL I/O
A31
DEP3#
AGTL I/O
C9
D36#
AGTL I/O
E31
DEP4#
AGTL I/O
A9
D37#
AGTL I/O
C29
DEP5#
AGTL I/O
D8
D38#
AGTL I/O
E29
DEP6#
AGTL I/O
D10
D39#
AGTL I/O
A29
DEP7#
AGTL I/O
U1
D4#
AGTL I/O
AF36
DETECT
Power/Other
C15
D40#
AGTL I/O
AN27
DRDY#
AGTL I/O
D14
D41#
AGTL I/O
AN3
DYN_OE
Power/Other
D12
D42#
AGTL I/O
AC35
FERR#
CMOS Output
A7
D43#
AGTL I/O
AE37
FLUSH#
CMOS Input
A11
D44#
AGTL I/O
AL25
HIT#
AGTL I/O
C11
D45#
AGTL I/O
AL23
HITM#
AGTL I/O
A21
D46#
AGTL I/O
AE35
IERR#
CMOS Output
A15
D47#
AGTL I/O
AG37
IGNNE#
CMOS Input
A17
D48#
AGTL I/O
AG33
INIT#
CMOS Input
C13
D49#
AGTL I/O
AM2
KEY
Power/Other
S3
D5#
AGTL I/O
M36
LINT0/INTR
CMOS Input
C25
D50#
AGTL I/O
L37
LINT1/NMI
CMOS Input
A13
D51#
AGTL I/O
AK20
LOCK#
AGTL I/O
D16
D52#
AGTL I/O
N37
NCHCTRL
Power/Other
A23
D53#
AGTL I/O
J33
PICCLK
APIC Clock Input
C21
D54#
AGTL I/O
J35
PICD0
APIC I/O
C19
D55#
AGTL I/O
L35
PICD1
APIC I/O
C27
D56#
AGTL I/O
W33
PLL1
Power/Other
A19
D57#
AGTL I/O
U33
PLL2
Power/Other
C23
D58#
AGTL I/O
A35
PRDY#
AGTL Output
C17
D59#
AGTL I/O
J37
PREQ#
CMOS Input
T6
D6#
AGTL I/O
AK26
PWRGOOD
CMOS Input
A25
D60#
AGTL I/O
AK18
REQ0#
AGTL I/O
A27
D61#
AGTL I/O
AH16
REQ1#
AGTL I/O
E25
D62#
AGTL I/O
AH18
REQ2#
AGTL I/O
F16
D63#
AGTL I/O
AL19
REQ3#
AGTL I/O
J1
D7#
AGTL I/O
AL17
REQ4#
AGTL I/O
S1
D8#
AGTL I/O
AK30
Reserved
Reserved for future use
P6
D9#
AGTL I/O
AL1
Reserved
Reserved for future use
AL27
DBSY#
AGTL I/O
F10
Reserved
Reserved for future use
AN19
DEFER#
AGTL Input
E21
Reserved
Reserved for future use
C33
DEP0#
AGTL I/O
L33
Reserved
Reserved for future use
61
Intel® Pentium® III Processor with 512KB L2 Cache at 1.13GHz to 1.40GHz
Table 35. Signal Listing in Order by
Signal Name (Continued)
Pin
No.
62
Pin Name
Signal Group
Table 35. Signal Listing in Order by
Signal Name (Continued)
Pin
No.
Pin Name
Signal Group
N33
Reserved
Reserved for future use
AH36
VCCCORE
Power/Other
N35
Reserved
Reserved for future use
AJ13
VCCCORE
Power/Other
Q33
Reserved
Reserved for future use
AJ17
VCCCORE
Power/Other
Q35
Reserved
Reserved for future use
AJ21
VCCCORE
Power/Other
Q37
Reserved
Reserved for future use
AJ25
VCCCORE
Power/Other
R2
Reserved
Reserved for future use
AJ29
VCCCORE
Power/Other
W35
Reserved
Reserved for future use
AJ5
VCCCORE
Power/Other
Y1
Reserved
Reserved for future use
AJ9
VCCCORE
Power/Other
Z36
Reserved
Reserved for future use
AK2
VCCCORE
Power/Other
AH4
RESET#
AGTL Input
AK34
VCCCORE
Power/Other
AJ3
RESET2#
AGTL Input
AM12
VCCCORE
Power/Other
AN23
RP#
AGTL I/O
AM16
VCCCORE
Power/Other
AH26
RS0#
AGTL + Input
AM20
VCCCORE
Power/Other
AH22
RS1#
AGTL Input
AM24
VCCCORE
Power/Other
AK28
RS2#
AGTL Input
AM28
VCCCORE
Power/Other
AC37
RSP#
AGTL Input
AM32
VCCCORE
Power/Other
S35
RTTCTRL
Power/Other
AM4
VCCCORE
Power/Other
E27
SLEWCTRL
Power/Other
AM8
VCCCORE
Power/Other
AH30
SLP#
CMOS Input
B10
VCCCORE
Power/Other
AJ35
SMI#
CMOS Input
B14
VCCCORE
Power/Other
AG35
STPCLK#
CMOS Input
B18
VCCCORE
Power/Other
AL33
TCK
TAP Input
B22
VCCCORE
Power/Other
AN35
TDI
TAP Input
B26
VCCCORE
Power/Other
AN37
TDO
TAP Output
B30
VCCCORE
Power/Other
AL29
THERMDN
Power/Other
B34
VCCCORE
Power/Other
AL31
THERMDP
Power/Other
B6
VCCCORE
Power/Other
AH28
THERMTRIP#
CMOS Output
C3
VCCCORE
Power/Other
AK32
TMS
TAP Input
D20
VCCCORE
Power/Other
AN25
TRDY#
AGTL Input
D24
VCCCORE
Power/Other
AN33
TRST#
TAP Input
D28
VCCCORE
Power/Other
AA37
VCCCORE
Power/Other
D32
VCCCORE
Power/Other
AA5
VCCCORE
Power/Other
D36
VCCCORE
Power/Other
AB2
VCCCORE
Power/Other
D6
VCCCORE
Power/Other
AB34
VCCCORE
Power/Other
E13
VCCCORE
Power/Other
AD32
VCCCORE
Power/Other
E17
VCCCORE
Power/Other
AE5
VCCCORE
Power/Other
E5
VCCCORE
Power/Other
AF2
VCCCORE
Power/Other
E9
VCCCORE
Power/Other
AF34
VCCCORE
Power/Other
F14
VCCCORE
Power/Other
AH24
VCCCORE
Power/Other
F2
VCCCORE
Power/Other
AH32
VCCCORE
Power/Other
F22
VCCCORE
Power/Other
Datasheet
Intel® Pentium® III Processor with 512KB L2 Cache at 1.13GHz to 1.40GHz
Table 35. Signal Listing in Order by
Signal Name (Continued)
Pin
No.
Datasheet
Pin Name
Signal Group
Table 35. Signal Listing in Order by
Signal Name (Continued)
Pin
No.
F26
VCCCORE
Power/Other
AC5
F30
VCCCORE
Power/Other
F34
VCCCORE
Power/Other
F4
VCCCORE
H32
VCCCORE
H36
J5
K2
K32
Pin Name
Signal Group
Vss
Power/Other
AD2
Vss
Power/Other
AD34
Vss
Power/Other
Power/Other
AF32
Vss
Power/Other
Power/Other
AG5
Vss
Power/Other
VCCCORE
Power/Other
AH2
Vss
Power/Other
VCCCORE
Power/Other
AH34
Vss
Power/Other
VCCCORE
Power/Other
AJ11
Vss
Power/Other
VCCCORE
Power/Other
AJ15
Vss
Power/Other
K34
VCCCORE
Power/Other
AJ19
Vss
Power/Other
M32
VCCCORE
Power/Other
AJ23
Vss
Power/Other
N5
VCCCORE
Power/Other
AJ27
Vss
Power/Other
P2
VCCCORE
Power/Other
AJ7
Vss
Power/Other
P34
VCCCORE
Power/Other
AL3
Vss
Power/Other
R32
VCCCORE
Power/Other
AM10
Vss
Power/Other
R36
VCCCORE
Power/Other
AM14
Vss
Power/Other
S5
VCCCORE
Power/Other
AM18
Vss
Power/Other
T2
VCCCORE
Power/Other
AM22
Vss
Power/Other
T34
VCCCORE
Power/Other
AM26
Vss
Power/Other
V32
VCCCORE
Power/Other
AM30
Vss
Power/Other
V36
VCCCORE
Power/Other
AM34
Vss
Power/Other
W5
VCCCORE
Power/Other
AM6
Vss
Power/Other
Y35
VCCCORE
Power/Other
B12
Vss
Power/Other
Z32
VCCCORE
Power/Other
B16
Vss
Power/Other
AK22
VCMOS_REF
Power/Other
B20
Vss
Power/Other
AK36
VID 25mV
3.3V Output
B24
Vss
Power/Other
AL35
VID0
3.3V Output
B28
Vss
Power/Other
AM36
VID1
3.3V Output
B32
Vss
Power/Other
AL37
VID2
3.3V Output
B4
Vss
Power/Other
AJ37
VID3
3.3V Output
B8
Vss
Power/Other
E33
VREF0
Power/Other
D18
Vss
Power/Other
F18
VREF1
Power/Other
D2
Vss
Power/Other
K4
VREF2
Power/Other
D22
Vss
Power/Other
R6
VREF3
Power/Other
D26
Vss
Power/Other
V6
VREF4
Power/Other
D30
Vss
Power/Other
AD6
VREF5
Power/Other
D34
Vss
Power/Other
AK12
VREF6
Power/Other
D4
Vss
Power/Other
A37
Vss
Power/Other
E11
Vss
Power/Other
AB32
Vss
Power/Other
E15
Vss
Power/Other
AC33
Vss
Power/Other
E19
Vss
Power/Other
63
Intel® Pentium® III Processor with 512KB L2 Cache at 1.13GHz to 1.40GHz
Table 35. Signal Listing in Order by
Signal Name (Continued)
Pin
No.
64
Pin Name
Signal Group
Table 35. Signal Listing in Order by
Signal Name (Continued)
Pin
No.
Pin Name
Signal Group
E7
Vss
Power/Other
G37
VTT
Power/Other
F20
Vss
Power/Other
S33
VTT
Power/Other
F24
Vss
Power/Other
X34
VTT
Power/Other
F28
Vss
Power/Other
AA33
VTT
Power/Other
F32
Vss
Power/Other
AA35
VTT
Power/Other
F36
Vss
Power/Other
AN21
VTT
Power/Other
G5
Vss
Power/Other
S37
VTT
Power/Other
H2
Vss
Power/Other
U35
VTT
Power/Other
H34
Vss
Power/Other
U37
VTT
Power/Other
AK4
VTT_PWRGD
Power/Other
K36
Vss
Power/Other
L5
Vss
Power/Other
M2
Vss
Power/Other
M34
Vss
Power/Other
P32
Vss
Power/Other
P36
Vss
Power/Other
Q5
Vss
Power/Other
R34
Vss
Power/Other
T32
Vss
Power/Other
T36
Vss
Power/Other
U5
Vss
Power/Other
V2
Vss
Power/Other
V34
Vss
Power/Other
X32
Vss
Power/Other
X36
Vss
Power/Other
X4
Vss
Power/Other
Y37
Vss
Power/Other
Y5
Vss
Power/Other
Z2
Vss
Power/Other
Z34
Vss
Power/Other
AB36
VTT
Power/Other
AD36
VTT
Power/Other
AG1
VTT
Power/Other
AH20
VTT
Power/Other
AK16
VTT
Power/Other
AL13
VTT
Power/Other
AL21
VTT
Power/Other
AN11
VTT
Power/Other
AN15
VTT
Power/Other
E23
VTT
Power/Other
G35
VTT
Power/Other
Datasheet
Intel® Pentium® III Processor with 512KB L2 Cache at 1.13GHz to 1.40GHz
Table 36. Signal Listing in Order by Pin
Number
Pin
No.
Datasheet
Pin Name
Signal Group
Table 36. Signal Listing in Order by Pin
Number (Continued)
Pin
No.
Pin Name
Signal Group
A3
D29#
AGTL I/O
AD34
Vss
Power/Other
A5
D28#
AGTL I/O
AD36
VTT
Power/Other
A7
D43#
AGTL I/O
AE1
A17#
AGTL I/O
A9
D37#
AGTL I/O
AE3
A22#
AGTL I/O
A11
D44#
AGTL I/O
AE5
VCCCORE
Power/Other
A13
D51#
AGTL I/O
AE33
A20M#
CMOS Input
A15
D47#
AGTL I/O
AE35
IERR#
CMOS Output
A17
D48#
AGTL I/O
AE37
FLUSH#
CMOS Input
A19
D57#
AGTL I/O
AF2
VCCCORE
Power/Other
A21
D46#
AGTL I/O
AF4
A35#
AGTL I/O
A23
D53#
AGTL I/O
AF6
A25#
AGTL I/O
A25
D60#
AGTL I/O
AF32
Vss
Power/Other
A27
D61#
AGTL I/O
AF34
VCCCORE
Power/Other
A29
DEP7#
AGTL I/O
AF36
DETECT
Power/Other
A31
DEP3#
AGTL I/O
AG1
VTT
Power/Other
A33
DEP2#
AGTL I/O
AG3
A19#
AGTL I/O
A35
PRDY#
AGTL Output
AG5
Vss
Power/Other
A37
Vss
Power/Other
AG33
INIT#
CMOS Input
AA1
A27#
AGTL I/O
AG35
STPCLK#
CMOS Input
AA3
A30#
AGTL I/O
AG37
IGNNE#
CMOS Input
AA5
VCCCORE
Power/Other
AH2
Vss
Power/Other
AA33
VTT
Power/Other
AH4
RESET#
AGTL Input
AA35
VTT
Power/Other
AH6
A10#
AGTL I/O
AA37
VCCCORE
Power/Other
AH8
A5#
AGTL I/O
AB2
VCCCORE
Power/Other
AH10
A8#
AGTL I/O
AB4
A24#
AGTL I/O
AH12
A4#
AGTL I/O
AB6
A23#
AGTL I/O
AH14
BNR#
AGTL I/O
AB32
Vss
Power/Other
AH16
REQ1#
AGTL I/O
AB34
VCCCORE
Power/Other
AH18
REQ2#
AGTL I/O
AB36
VTT
Power/Other
AH20
VTT
Power/Other
AC1
A33#
AGTL I/O
AH22
RS1#
AGTL Input
AC3
A20#
AGTL I/O
AH24
VCCCORE
Power/Other
AC5
Vss
Power/Other
AH26
RS0#
AGTL + Input
AC33
Vss
Power/Other
AH28
THERMTRIP#
CMOS Output
AC35
FERR#
CMOS Output
AH30
SLP#
CMOS Input
AC37
RSP#
AGTL Input
AH32
VCCCORE
Power/Other
AD2
Vss
Power/Other
AH34
Vss
Power/Other
AD4
A31#
AGTL I/O
AH36
VCCCORE
Power/Other
AD6
VREF5
Power/Other
AJ1
A21#
AGTL I/O
AD32
VCCCORE
Power/Other
AJ3
RESET2#
AGTL Input
65
Intel® Pentium® III Processor with 512KB L2 Cache at 1.13GHz to 1.40GHz
Table 36. Signal Listing in Order by Pin
Number (Continued)
Pin
No.
AJ5
66
Pin Name
VCCCORE
Signal Group
Table 36. Signal Listing in Order by Pin
Number (Continued)
Pin
No.
Power/Other
AL11
Pin Name
AP0#
Signal Group
AGTL I/O
AJ7
Vss
Power/Other
AL13
VTT
Power/Other
AJ9
VCCCORE
Power/Other
AL15
A7#
AGTL I/O
AJ11
Vss
Power/Other
AL17
REQ4#
AGTL I/O
AJ13
VCCCORE
Power/Other
AL19
REQ3#
AGTL I/O
AJ15
Vss
Power/Other
AL21
VTT
Power/Other
AJ17
VCCCORE
Power/Other
AL23
HITM#
AGTL I/O
AJ19
Vss
Power/Other
AL25
HIT#
AGTL I/O
AJ21
VCCCORE
Power/Other
AL27
DBSY#
AGTL I/O
AJ23
Vss
Power/Other
AL29
THERMDN
Power/Other
AJ25
VCCCORE
Power/Other
AL31
THERMDP
Power/Other
AJ27
Vss
Power/Other
AL33
TCK
TAP Input
AJ29
VCCCORE
Power/Other
AL35
VID0
3.3V Output
AJ31
BSEL1
3.3V Output
AL37
VID2
3.3V Output
AJ33
BSEL0
3.3V Output
AM2
KEY
Power/Other
AJ35
SMI#
CMOS Input
AM4
VCCCORE
Power/Other
AJ37
VID3
3.3V Output
AM6
Vss
Power/Other
AK2
VCCCORE
Power/Other
AM8
VCCCORE
Power/Other
AK4
VTT_PWRGD
Power/Other
AM10
Vss
Power/Other
AK6
A28#
AGTL I/O
AM12
VCCCORE
Power/Other
AK8
A3#
AGTL I/O
AM14
Vss
Power/Other
AK10
A11#
AGTL I/O
AM16
VCCCORE
Power/Other
AK12
VREF6
Power/Other
AM18
Vss
Power/Other
AK14
A14#
AGTL I/O
AM20
VCCCORE
Power/Other
AK16
VTT
Power/Other
AM22
Vss
Power/Other
AK18
REQ0#
AGTL I/O
AM24
VCCCORE
Power/Other
AK20
LOCK#
AGTL I/O
AM26
Vss
Power/Other
AK22
VCMOS_REF
Power/Other
AM28
VCCCORE
Power/Other
AK24
AERR#
AGTL I/O
AM30
Vss
Power/Other
AK26
PWRGOOD
CMOS Input
AM32
VCCCORE
Power/Other
AK28
RS2#
AGTL Input
AM34
Vss
Power/Other
AK30
Reserved
Reserved for future use
AM36
VID1
3.3V Output
AK32
TMS
TAP Input
AN3
DYN_OE
Power/Other
AK34
VCCCORE
Power/Other
AN5
A12#
AGTL I/O
AK36
VID 25mV
3.3V Output
AN7
A16#
AGTL I/O
AL1
Reserved
Reserved for future use
AN9
A6#
AGTL I/O
AL3
Vss
Power/Other
AN11
VTT
Power/Other
AL5
A15#
AGTL I/O
AN13
AP1#
AGTL I/O
AL7
A13#
AGTL I/O
AN15
VTT
Power/Other
AL9
A9#
AGTL I/O
AN17
BPRI#
AGTL Input
Datasheet
Intel® Pentium® III Processor with 512KB L2 Cache at 1.13GHz to 1.40GHz
Table 36. Signal Listing in Order by Pin
Number (Continued)
Pin
No.
Datasheet
Pin Name
Signal Group
Table 36. Signal Listing in Order by Pin
Number (Continued)
Pin
No.
Pin Name
Signal Group
AN19
DEFER#
AGTL Input
C25
D50#
AGTL I/O
AN21
VTT
Power/Other
C27
D56#
AGTL I/O
AN23
RP#
AGTL I/O
C29
DEP5#
AGTL I/O
AN25
TRDY#
AGTL Input
C31
DEP1#
AGTL I/O
AN27
DRDY#
AGTL I/O
C33
DEP0#
AGTL I/O
AN29
BR0#
AGTL I/O
C35
BPM0#
AGTL I/O
AN31
ADS#
AGTL I/O
C37
CPUPRES#
Power/Other
AN33
TRST#
TAP Input
D2
Vss
Power/Other
AN35
TDI
TAP Input
D4
Vss
Power/Other
AN37
TDO
TAP Output
D6
VCCCORE
Power/Other
B2
D35#
AGTL I/O
D8
D38#
AGTL I/O
B4
Vss
Power/Other
D10
D39#
AGTL I/O
B6
VCCCORE
Power/Other
D12
D42#
AGTL I/O
B8
Vss
Power/Other
D14
D41#
AGTL I/O
B10
VCCCORE
Power/Other
D16
D52#
AGTL I/O
B12
Vss
Power/Other
D18
Vss
Power/Other
B14
VCCCORE
Power/Other
D20
VCCCORE
Power/Other
B16
Vss
Power/Other
D22
Vss
Power/Other
B18
VCCCORE
Power/Other
D24
VCCCORE
Power/Other
B20
Vss
Power/Other
D26
Vss
Power/Other
B22
VCCCORE
Power/Other
D28
VCCCORE
Power/Other
B24
Vss
Power/Other
D30
Vss
Power/Other
B26
VCCCORE
Power/Other
D32
VCCCORE
Power/Other
B28
Vss
Power/Other
D34
Vss
Power/Other
B30
VCCCORE
Power/Other
D36
VCCCORE
Power/Other
B32
Vss
Power/Other
E1
D26#
AGTL I/O
B34
VCCCORE
Power/Other
E3
D25#
AGTL I/O
B36
BINIT#
AGTL I/O
E5
VCCCORE
Power/Other
C1
D33#
AGTL I/O
E7
Vss
Power/Other
C3
VCCCORE
Power/Other
E9
VCCCORE
Power/Other
C5
D31#
AGTL I/O
E11
Vss
Power/Other
C7
D34#
AGTL I/O
E13
VCCCORE
Power/Other
C9
D36#
AGTL I/O
E15
Vss
Power/Other
C11
D45#
AGTL I/O
E17
VCCCORE
Power/Other
C13
D49#
AGTL I/O
E19
Vss
Power/Other
C15
D40#
AGTL I/O
E21
Reserved
Reserved for future use
C17
D59#
AGTL I/O
E23
VTT 4
Power/Other
C19
D55#
AGTL I/O
E25
D62#
AGTL I/O
C21
D54#
AGTL I/O
E27
SLEWCTRL
Power/Other
C23
D58#
AGTL I/O
E29
DEP6#
AGTL I/O
67
Intel® Pentium® III Processor with 512KB L2 Cache at 1.13GHz to 1.40GHz
Table 36. Signal Listing in Order by Pin
Number (Continued)
Pin
No.
E31
68
Pin Name
DEP4#
Signal Group
Table 36. Signal Listing in Order by Pin
Number (Continued)
Pin
No.
Pin Name
AGTL I/O
K2
VCCCORE
Signal Group
Power/Other
E33
VREF0
Power/Other
K4
VREF2
Power/Other
E35
BPM1#
AGTL I/O
K6
D24#
AGTL I/O
E37
BP3#
AGTL I/O
K32
VCCCORE
Power/Other
F2
VCCCORE
Power/Other
K34
VCCCORE
Power/Other
F4
VCCCORE
Power/Other
K36
Vss
Power/Other
F6
D32#
AGTL I/O
L1
D13#
AGTL I/O
F8
D22#
AGTL I/O
L3
D20#
AGTL I/O
F10
Reserved
Reserved for future use
L5
Vss
Power/Other
F12
D27#
AGTL I/O
L33
Reserved
Reserved for future use
F14
VCCCORE
Power/Other
L35
PICD1
APIC I/O
F16
D63#
AGTL I/O
L37
LINT1/NMI
CMOS Input
F18
VREF1
Power/Other
M2
Vss
Power/Other
F20
Vss
Power/Other
M4
D11#
AGTL I/O
F22
VCCCORE
Power/Other
M6
D3#
AGTL I/O
F24
Vss
Power/Other
M32
VCCCORE
Power/Other
F26
VCCCORE
Power/Other
M34
Vss
Power/Other
F28
Vss
Power/Other
M36
LINT0/INTR
CMOS Input
F30
VCCCORE
Power/Other
N1
D2#
AGTL I/O
F32
Vss
Power/Other
N3
D14#
AGTL I/O
F34
VCCCORE
Power/Other
N5
VCCCORE
Power/Other
F36
Vss
Power/Other
N33
Reserved
Reserved for future use
G1
D21#
AGTL I/O
N35
Reserved
Reserved for future use
G3
D23#
AGTL I/O
N37
NCHCTRL
Power/Other
G5
Vss
Power/Other
Q33
Reserved
Reserved for future use
G33
BP2#
AGTL I/O
P2
VCCCORE
Power/Other
G35
VTT
Power/Other
P4
D18#
AGTL I/O
G37
VTT
Power/Other
P6
D9#
AGTL I/O
H2
Vss
Power/Other
P32
Vss
Power/Other
H4
D16#
AGTL I/O
P34
VCCCORE
Power/Other
H6
D19#
AGTL I/O
P36
Vss
Power/Other
H32
VCCCORE
Power/Other
Q1
D12#
AGTL I/O
H34
Vss
Power/Other
Q3
D10#
AGTL I/O
H36
VCCCORE
Power/Other
Q5
Vss
Power/Other
J1
D7#
AGTL I/O
Q35
Reserved
Reserved for future use
J3
D30#
AGTL I/O
Q37
Reserved
Reserved for future use
J5
VCCCORE
Power/Other
R2
Reserved
Reserved for future use
J33
PICCLK
APIC Clock Input
R4
D17#
AGTL I/O
J35
PICD0
APIC I/O
R6
VREF3
Power/Other
J37
PREQ#
CMOS Input
R32
VCCCORE
Power/Other
Datasheet
Intel® Pentium® III Processor with 512KB L2 Cache at 1.13GHz to 1.40GHz
Table 36. Signal Listing in Order by Pin
Number (Continued)
Pin
No.
R34
Datasheet
Pin Name
Signal Group
Table 36. Signal Listing in Order by Pin
Number (Continued)
Pin
No.
Pin Name
Signal Group
Vss
Power/Other
V36
VCCCORE
Power/Other
R36
VCCCORE
Power/Other
W1
D0#
AGTL I/O
S1
D8#
AGTL I/O
W3
A34#
AGTL I/O
S3
D5#
AGTL I/O
W5
VCCCORE
Power/Other
S5
VCCCORE
Power/Other
W33
PLL1
Power/Other
S33
VTT
Power/Other
W35
Reserved
Reserved for future use
S35
RTTCTRL
Power/Other
W37
BCLK
System Bus Clock
S37
VTT
Power/Other
X2
BR1#
AGTL I/O
T2
VCCCORE
Power/Other
X4
Vss
Power/Other
T4
D1#
AGTL I/O
X6
A32#
AGTL I/O
T6
D6#
AGTL I/O
X32
Vss
Power/Other
T32
Vss
Power/Other
X34
VTT
Power/Other
T34
VCCCORE
Power/Other
X36
Vss
Power/Other
T36
Vss
Power/Other
Y1
Reserved
Reserved for future use
U1
D4#
AGTL I/O
Y3
A26#
AGTL I/O
U3
D15#
AGTL I/O
Y5
Vss
Power/Other
U5
Vss
Power/Other
Y33
BCLK#/CLKREF
System Bus Clock
U33
PLL2
Power/Other
Y35
VCCCORE
Power/Other
U35
VTT
Power/Other
Y37
Vss
Power/Other
U37
VTT
Power/Other
Z2
Vss
Power/Other
V2
Vss
Power/Other
Z4
A29#
AGTL I/O
V4
BERR#
AGTL I/O
Z6
A18#
AGTL I/O
V6
VREF4
Power/Other
Z32
VCCCORE
Power/Other
V32
VCCCORE
Power/Other
Z34
Vss
Power/Other
V34
Vss
Power/Other
Z36
Reserved
Reserved for future use
69
Intel® Pentium® III Processor with 512KB L2 Cache at 1.13GHz to 1.40GHz
6.0
Boxed Processor Specifications
The Intel® Pentium® III processor with 512KB L2 Cache for the PGA370 socket is also offered as
an Intel® boxed processor. Intel® boxed processors are intended for system integrators who build
systems from motherboards and standard components. The boxed Intel® Pentium® III processor
with 512KB L2 Cache will be supplied with an unattached fan heatsink.
This section documents motherboard and system requirements for the fan heatsink that will be
supplied with the boxed Intel® Pentium® III processor with 512KB L2 Cache. This section is
particularly important for OEMs that manufacture motherboards for system integrators. Unless
otherwise noted, all figures in this section are dimensioned in inches. Figure 28 shows a conceptual
representation of the boxed Intel® Pentium® III processor with 512KB L2 Cache in the Flip Chip
Pin Grid Array 2 (FC-PGA2) package.
Note:
Drawings in this section reflect only the specifications on the Intel® Boxed Processor product.
These dimensions should not be used as a generic keep-out zone for all heatsinks. It is the system
designer’s responsibility to consider their proprietary solution when designing to the required keepout zone on their system platform and chassis. Refer to the Intel® Pentium® III Processor Thermal/
Mechanical Functional Specification for further guidance. Contact your local Intel Sales
Representative for this document.
Figure 28. Conceptual Boxed Intel® Pentium® III Processor with 512KB L2 Cache for the
PGA370 Socket
70
Datasheet
Intel® Pentium® III Processor with 512KB L2 Cache at 1.13GHz to 1.40GHz
6.1
Mechanical Specifications
6.1.1
Mechanical Specifications for the FC-PGA2 Package
This section documents the mechanical specifications of the boxed Intel® Pentium® III processor
with 512KB L2 Cache fan heatsink in the FC-PGA2 Package. The boxed processor in the FCPGA2 Package ships with an un-attached fan heatsink. Figure 28 shows a conceptual
representation of the boxed Intel® Pentium® III processor with 512KB L2 Cache for the PGA370
socket in the Flip Chip Pin Grid Array 2 (FC-PGA2) package.
The boxed processor fan heatsink is also asymmetrical in that the mechanical step feature, Figure
31, must sit over the socket’s cam. The step allows the heatsink to securely interface with the
processor in order to meet the processor’s thermal requirements.
The dimensions for the boxed processor with the integrated fan heatsink are shown in Figure 30.
All dimensions are in inches.
The Intel® Pentium® III processor with 512KB L2 Cache uses a new technology termed FCPGA2. The FC-PGA2 package leverages the previous FC-PGA package technology used on legacy
Pentium® III processors. The FC-PGA2 package adds an Integrated Heat Spreader (IHS) to
improve heat conduction from the processor die. This new solution prevent the need for exotic
thermal solutions in the higher power density processors. See section 5.0 of this document for the
mechanical specifications of the PGA370 socket.
Section 5.2 of this document also shows the recommended mechanical keepout zones for the boxed
processor fan heatsink assembly. Figure 24 and Figure 25 show the REQUIRED keepout
dimensions for the boxed processor thermal solution. The cooling fin orientation on the heatsink
relative to the PGA370 socket is subject to change. Contact your local Intel Sales Representative
for documentation specific to the boxed fan heatsink orientation relative to the PGA370 socket.
Figure 31 shows the changes to the package mechanicals between the FC-PGA and FC-PGA2
designs. Note that the boxed fan heatsinks and associated clips are not compatible with earlier
boxed Intel® Pentium® III processor fan heatsinks.
Figure 29. Comparison between FC-PGA and FC-PGA2 package
Datasheet
71
Intel® Pentium® III Processor with 512KB L2 Cache at 1.13GHz to 1.40GHz
Figure 30. Side View of Space Requirements for the Boxed Processor
Table 37. Boxed Processor Fan Heatsink Spatial Dimensions
Dimensions (Inches)
Min
Typ
Max
Units
Fan Heatsink Length
3.14
Inches
Fan Heatsink Height
1.81
Inches
2.6
Inches
.33
Inches
Fan Heatsink Width
Fan Heatsink height above motherboard
.29
Air Keepout Zones from end of Fan Heatsink
.20
.30
Inches
Figure 31. Dimensions of Mechanical Step Feature in Heatsink Base
0.043
0.472
6.1.2
Boxed Processor Heatsink Weight
The boxed processor thermal cooling solution will not weigh more than 180 grams.
72
Datasheet
Intel® Pentium® III Processor with 512KB L2 Cache at 1.13GHz to 1.40GHz
6.2
Thermal Specifications
This section describes the cooling requirements of the thermal cooling solution utilized by the
boxed processor.
6.2.1
Boxed Processor Cooling Requirements
The boxed processor is directly cooled with a fan heatsink. However, meeting the processor’s
temperature specification is also a function of the thermal design of the entire system and
ultimately the responsibility of the system integrator. The processor temperature specification is
found in Section 4.1 of this document. The boxed processor fan heatsink is able to keep the
processor temperature within the specifications (see Table 29 in Section 4.1) in chassis that provide
good thermal management.
For the boxed processor fan heatsink to operate properly, it is critical that the airflow provided to
the fan heatsink is unimpeded. Airflow of the fan heatsink is into the center and out of the sides of
the fan heatsink. Airspace is required around the fan to ensure that the airflow through the fan
heatsink is not blocked. Blocking the airflow to the fan heatsink reduces the cooling efficiency and
decreases fan life. Figure 32 illustrate an acceptable airspace clearance for the fan heatsink. It is
also recommended that the air temperature entering the fan be kept below 45 degrees C. Again,
meeting the processor’s temperature specification is the responsibility of the system integrator. The
processor temperature specification is found in Section 4.1 of this document.
Figure 32. Thermal Airspace Requirement for all Boxed Intel® Pentium® III Processor with
512KB L2 Cache Fan Heatsinks in the PGA370 Socket
6.2.2
Boxed Processor Thermal Cooling Solution Clip
The boxed processor thermal solution requires installation by a system integrator to secure the
thermal cooling solution to the processor after it is installed in the 370-pin socket ZIF socket.
Motherboards designed for use by system integrators should take care to consider the implications
of clip installation and potential scraping of the motherboard PCB underneath the 370-pin socket
attach tabs. Motherboard components should not be placed too close to the 370-pin socket attach
Datasheet
73
Intel® Pentium® III Processor with 512KB L2 Cache at 1.13GHz to 1.40GHz
tabs in a way that interferes with the installation of the boxed processor thermal cooling solution
Figure 24 and Figure 25 show the REQUIRED keepout dimensions for the boxed processor
thermal solution.
6.3
Electrical Requirements for the Boxed Intel® Pentium® III
Processor with 512KB L2 Cache
6.3.1
Electrical Requirements
The boxed processor's fan heatsink requires a +12 V power supply. A fan power cable is attached
to the fan and will draw power from a power header on the motherboard. The power cable
connector and pinout are shown in Figure 33. Motherboards must provide a matched power header
to support the boxed processor. Table 38 contains specifications for the input and output signals at
the fan heatsink connector. The fan heatsink outputs a SENSE signal (an open-collector output)
that pulses at a rate of two pulses per fan revolution. A motherboard pull-up resistor provides VOH
to match the motherboard-mounted fan speed monitor requirements, if applicable. Use of the
SENSE signal is optional. If the SENSE signal is not used, pin 3 of the connector should be tied to
GND.
The power header on the baseboard must be positioned to allow the fan heatsink power cable to
reach it. The power header identification and location should be documented in the motherboard
documentation or on the motherboard. Figure 34 shows the recommended location of the fan
power connector relative to the PGA370 socket. The motherboard power header should be
positioned within 4.00 inches (lateral) of the fan power connector for the FC-PGA2 package.
Figure 33. Boxed Processor Fan Heatsink Power Cable Connector Description
Pin
Signal
1
GND
Straight square pin, 3-pin terminal housing with
polarizing ribs and friction locking ramp.
2
+12V
0.100" pin pitch, 0.025" square pin width.
3
SENSE
Waldom/Molex P/N 22-01-3037 or equivalent.
Match with straight pin, friction lock header on motherboard
Waldom/Molex P/N 22-23-2031, AMP P/N 640456-3,
or equivalent.
1
2
3
Table 38. Fan Heatsink Power and Signal Specifications
Description
+12 V: 12 volt fan power supply
Min
Typ
Max
10.8 V
12 V
13.2 V
IC: Fan current draw
SENSE: SENSE frequency (motherboard should pull this
pin up to appropriate VCC with resistor)
74
100 mA
2 pulses per
fan revolution
Datasheet
Intel® Pentium® III Processor with 512KB L2 Cache at 1.13GHz to 1.40GHz
Figure 34. Motherboard Power Header Placement Relative to the Boxed Intel® Pentium® III
Processor with 512KB L2 Cache
0.10"
R = 4.00”
PGA370
Socket
7
0.10"
Datasheet
75
Intel® Pentium® III Processor with 512KB L2 Cache at 1.13GHz to 1.40GHz
7.0
Processor Signal Description
This section provides an alphabetical listing of all the Intel® Pentium® III processor with 512 KB
L2 Cache signals. The tables at the end of this section summarize the signals by direction: output,
input, and I/O.
7.1
Alphabetical Signals Reference
Table 39. Signal Description (Sheet 1 of 9)
Name
A20M#
Type
I
Description
If the A20M# (Address-20 Mask) input signal is asserted, the processor masks
physical address bit 20 (A20#) before looking up a line in any internal cache and
before driving a read/write transaction on the bus. Asserting A20M# emulates the
8086 processor's address wrap-around at the 1MB boundary. Assertion of A20M#
is only supported in real mode.
A20M# is an asynchronous signal. However, to ensure recognition of this signal
following an I/O write instruction, it must be valid along with the TRDY# assertion of
the corresponding I/O Write bus transaction.
A[35:3]#
I/O
The A[35:3]# (Address) signals define a 236-byte physical memory address space.
When ADS# is active, these pins transmit the address of a transaction; when ADS#
is inactive, these pins transmit transaction type information. These signals must
connect the appropriate pins of all agents on the processor system bus. The
A[35:24]# signals are parity-protected by the AP1# parity signal, and the A[23:3]#
signals are parity-protected by the AP0# parity signal.
On the active-to-inactive transition of RESET#, the processors sample the A[35:3]#
pins to determine their power-on configuration. See the Intel® Pentium® II
Processor Developer’s Manual for details.
ADS#
AERR#
I/O
I/O
The ADS# (Address Strobe) signal is asserted to indicate the validity of the
transaction address on the A[35:3]# pins. All bus agents observe the ADS#
activation to begin parity checking, protocol checking, address decode, internal
snoop, or deferred reply ID match operations associated with the new transaction.
This signal must connect the appropriate pins on all processor system bus agents.
The AERR# (Address Parity Error) signal is observed and driven by all processor
system bus agents, and if used, must connect the appropriate pins on all processor
system bus agents. AERR# observation is optionally enabled during power-on
configuration; if enabled, a valid assertion of AERR# aborts the current transaction.
If AERR# observation is disabled during power-on configuration, a central agent
may handle an assertion of AERR# as appropriate to the error handling architecture
of the system.
AP[1:0]#
BCLK/BCLK#
I/O
I
The AP[1:0]# (Address Parity) signals are driven by the request initiator along with
ADS#, A[35:3]#, REQ[4:0]#, and RP#. AP1# covers A[35:24]#, and AP0# covers
A[23:3]#. A correct parity signal is high if an even number of covered signals are
low and low if an odd number of covered signals are low. This allows parity to be
high when all the covered signals are high. AP[1:0]# should connect the appropriate
pins of all processor system bus agents.
The BCLK (Bus Clock) and BCLK# (for differential clock) signals determines the
bus frequency. All processor system bus agents must receive this signal to drive
their outputs and latch their inputs on the rising edge of BCLK. For differential
clocking, all processor system bus agents must receive this signal to drive their
outputs and latch their inputs on the BCLK and BCLK# crossing point.
All external timing parameters are specified with respect to the BCLK signal.
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Intel® Pentium® III Processor with 512KB L2 Cache at 1.13GHz to 1.40GHz
Table 39. Signal Description (Sheet 2 of 9)
Name
Type
Description
The BERR# (Bus Error) signal is asserted to indicate an unrecoverable error
without a bus protocol violation. It may be driven by all processor system bus
agents, and must connect the appropriate pins of all such agents, if used. However,
Intel® Pentium® III processors do not observe assertions of the BERR# signal.
BERR#
I/O
BERR# assertion conditions are configurable at a system level. Assertion options
are defined by the following options:
• Enabled or disabled.
• Asserted optionally for internal errors along with IERR#.
• Asserted optionally by the request initiator of a bus transaction after it observes
an error.
• Asserted by any bus agent when it observes an error in a bus transaction.
The BINIT# (Bus Initialization) signal may be observed and driven by all processor
system bus agents, and if used must connect the appropriate pins of all such
agents. If the BINIT# driver is enabled during power on configuration, BINIT# is
asserted to signal any bus condition that prevents reliable future information.
BINIT#
I/O
If BINIT# observation is enabled during power-on configuration, and BINIT# is
sampled asserted, all bus state machines are reset and any data which was in
transit is lost. All agents reset their rotating ID for bus arbitration to the state after
Reset, and internal count information is lost. The L1 and L2 caches are not
affected.
If BINIT# observation is disabled during power-on configuration, a central agent
may handle an assertion of BINIT# as appropriate to the error handling architecture
of the system.
The BNR# (Block Next Request) signal is used to assert a bus stall by any bus
agent who is unable to accept new bus transactions. During a bus stall, the current
bus owner cannot issue any new transactions.
I/O
BP[3:2]#
I/O
The BP[3:2]# (Breakpoint) signals are outputs from the processor that indicate the
status of breakpoints.
BPM[1:0]#
I/O
The BPM[1:0]# (Breakpoint Monitor) signals are breakpoint and performance
monitor signals. They are outputs from the processor which indicate the status of
breakpoints and programmable counters used for monitoring processor
performance.
BPRI#
Datasheet
Since multiple agents might need to request a bus stall at the same time, BNR# is a
wire-OR signal which must connect the appropriate pins of all processor system
bus agents. In order to avoid wire-OR glitches associated with simultaneous edge
transitions driven by multiple drivers, BNR# is activated on specific clock edges and
sampled on specific clock edges.
BNR#
I
The BPRI# (Bus Priority Request) signal is used to arbitrate for ownership of the
processor system bus. It must connect the appropriate pins of all processor system
bus agents. Observing BPRI# active (as asserted by the priority agent) causes all
other agents to stop issuing new requests, unless such requests are part of an
ongoing locked operation. The priority agent keeps BPRI# asserted until all of its
requests are completed, then releases the bus by deasserting BPRI#.
77
Intel® Pentium® III Processor with 512KB L2 Cache at 1.13GHz to 1.40GHz
Table 39. Signal Description (Sheet 3 of 9)
Name
Type
Description
The BR0# and BR1#(Bus Request) pins drive the BREQ[1:0]# signals in the
system. The BREQ[1:0]# signals are interconnected in a rotating manner to
individual processor pins. The table below gives the rotating interconnect between
the processor and bus signals.
BR0# (I/O) and BR1# Signals Rotating Interconnect
Bus Signal
BR0#/BR1#
I/O
Agent 0 Pins
Agent 1 Pins
BREQ0#
BR0#
BR1#
BREQ1#
BR1#
BR0#
During power-up configuration, the central agent asserts the BR0# bus signal in the
system to assign the symmetric agent ID to the processor. The processor samples
its BR0# pin on the active-to-inactive transition of the RESET# to obtain its
symmetric agent ID. The processor asserts the BR0# pin to request the system
bus. All agents then configure their pins to match the appropriate bus signal
protocol, as shown below.
BR0# (I/O) and BR1# Signals Rotating Interconnect
Pin Sampled Active in RESET#
Agent ID
BR0#
0
BR1#
3
For uni-processor designs, BR0# must be connected to a 10-56Ω resistor to VSS.
Refer to the platform design guide for implementation detail and resistor tolerance.
BSEL[1:0]
CLKREF
O
I
The BSEL signals are CMOS signals which are used to select the system bus
frequency. A BSEL[1:0] = ‘11’ selects a 133 MHz system bus frequency. The
frequency is determined by the processor(s), chipset, and frequency synthesizer
capabilities. All system bus agents must operate at the same frequency. The Intel®
Pentium® III processor with 512KB L2 Cache operates at 133 MHz system bus
frequency.
These signals must be pulled up to 3.3V power rail with 330 - 1 KΩ resistors and
provided as a frequency selection signal to the clock driver/synthesizer and chipset.
Refer to the platform design guide for implementation detail and resistor tolerance.
In Single-ended clock mode the CLKREF input is a filtered 1.25V supply voltage for
the processor PLL. A voltage divider and decoupling solution is provided by the
motherboard. See the design guide for implementation details.
When the processor operates in differential clock mode, this signal becomes
BCLK#.
78
Datasheet
Intel® Pentium® III Processor with 512KB L2 Cache at 1.13GHz to 1.40GHz
Table 39. Signal Description (Sheet 4 of 9)
Name
Type
Description
The CPUPRES# signal is defined to allow a system design to detect the presence
of a terminator device or processor in a PGA370 socket. Combined with the VID
combination of VID[25mV,3:0]= 11111 (see Section 2.6), a system can determine if
a socket is occupied, and whether a processor core is present. See the table below
for states and values for determining the presence of a device.
PGA370 Socket Occupation Truth Table
Signal
CPUPRES#
Value
Status
CPUPRES#
VID[25mV,3:0]
0
Anything other
than ‘11111’
Processor core installed in the PGA370
socket.
CPUPRES#
VID[25mV,3:0]
0
11111
Terminator device installed in the
PGA370 socket (i.e., no core present).
CPUPRES#
VID[25mV,3:0]
1
Any value
PGA370 socket not occupied.
I/O
The D[63:0]# (Data) signals are the data signals. These signals provide a 64-bit
data path between the processor system bus agents, and must connect the
appropriate pins on all such agents. The data driver asserts DRDY# to indicate a
valid data transfer.
I/O
The DBSY# (Data Bus Busy) signal is asserted by the agent responsible for driving
data on the processor system bus to indicate that the data bus is in use. The data
bus is released after DBSY# is deasserted. This signal must connect the
appropriate pins on all processor system bus agents.
I
The DEFER# signal is asserted by an agent to indicate that a transaction cannot be
guaranteed in-order completion. Assertion of DEFER# is normally the responsibility
of the addressed memory or I/O agent. This signal must connect the appropriate
pins of all processor system bus agents.
I/O
The DEP[7:0]# (Data Bus ECC Protection) signals provide optional ECC protection
for the data bus. They are driven by the agent responsible for driving D[63:0]#, and
must connect the appropriate pins of all processor system bus agents which use
them. The DEP[7:0]# signals are enabled or disabled for ECC protection during
power on configuration.
DETECT
O
A tri-state (high-impedance) output. Can be used for platforms that need to
differentiate Intel® Pentium® III processors with 512KB L2 Cache that support
VTT=1.25V only, from Pentium® III processors (AF36=VSS) that support
VTT=1.50V only. The output on this signal is stable when VTT is stable. Please
refer to the appropriate Platform Design Guide for implementation details.
DRDY#
I/O
The DRDY# (Data Ready) signal is asserted by the data driver on each data
transfer, indicating valid data on the data bus. In a multi-cycle data transfer, DRDY#
may be deasserted to insert idle clocks. This signal must connect the appropriate
pins of all processor system bus agents.
DYN_OE
I
The DYN_OE allows the BSEL and VID signals to be driven out from the processor.
When this signal is low (a condition that will occur if the Intel® Pentium® III
processor is installed in a non-supported platform), the VID and BSEL signals will
be tri-stated and the platform pull-up resistors will set the VID and BSEL to all ‘1’s’
which is a safe setting. This signal must be connected to a 1kΩ resistor to VTT.
Refer to the platform design guide for implementation detail and resistor tolerance.
FERR#
O
The FERR# (Floating-point Error) signal is asserted when the processor detects an
unmasked floating-point error. FERR# is similar to the ERROR# signal on the
Intel 387 coprocessor, and is included for compatibility with systems using
MS-DOS*-type floating-point error reporting.
D[63:0]#
DBSY#
DEFER#
DEP[7:0]#
Datasheet
O
79
Intel® Pentium® III Processor with 512KB L2 Cache at 1.13GHz to 1.40GHz
Table 39. Signal Description (Sheet 5 of 9)
Name
Type
Description
When the FLUSH# input signal is asserted, processors write back all data in the
Modified state from their internal caches and invalidate all internal cache lines. At
the completion of this operation, the processor issues a Flush Acknowledge
transaction. The processor does not cache any new data while the FLUSH# signal
remains asserted.
FLUSH#
I
FLUSH# is an asynchronous signal. However, to ensure recognition of this signal
following an I/O write instruction, it must be valid along with the TRDY# assertion of
the corresponding I/O Write bus transaction.
On the active-to-inactive transition of RESET#, each processor samples FLUSH#
to determine its power-on configuration. See the P6 Family of Processors
Hardware Developer’s Manual for details.
This signal must be connected to a 150ohm resistor to VCCCMOS1.5. Refer to the
platform design guide for implementation detail and resistor tolerance.
HIT#
I/O
HITM#
I/O
IERR#
IGNNE#
O
I
The HIT# (Snoop Hit) and HITM# (Hit Modified) signals convey transaction snoop
operation results, and must connect the appropriate pins of all processor system
bus agents. Any such agent may assert both HIT# and HITM# together to indicate
that it requires a snoop stall, which can be continued by reasserting HIT# and
HITM# together.
The IERR# (Internal Error) signal is asserted by a processor as the result of an
internal error. Assertion of IERR# is usually accompanied by a SHUTDOWN
transaction on the processor system bus. This transaction may optionally be
converted to an external error signal (e.g., NMI) by system core logic. The
processor will keep IERR# asserted until the assertion of RESET#, BINIT#, or
INIT#.
The IGNNE# (Ignore Numeric Error) signal is asserted to force the processor to
ignore a numeric error and continue to execute noncontrol floating-point
instructions. If IGNNE# is deasserted, the processor generates an exception on a
noncontrol floating-point instruction if a previous floating-point instruction caused an
error. IGNNE# has no effect when the NE bit in control register 0 is set.
IGNNE# is an asynchronous signal. However, to ensure recognition of this signal
following an I/O write instruction, it must be valid along with the TRDY# assertion of
the corresponding I/O Write bus transaction.
INIT#
I
The INIT# (Initialization) signal, when asserted, resets integer registers inside all
processors without affecting their internal (L1 or L2) caches or floating-point
registers. Each processor then begins execution at the power-on Reset vector
configured during power-on configuration. The processor continues to handle
snoop requests during INIT# assertion. INIT# is an asynchronous signal and must
connect the appropriate pins of all processor system bus agents.
If INIT# is sampled active on the active to inactive transition of RESET#, then the
processor executes its Built-in Self-Test (BIST).
KEY
LINT[1:0]
I
I
Can be used to prevent legacy processors from booting in incompatible platforms.
Legacy processors use this pin as a RESET and should be tied to ground for an
Intel® Pentium® III processor with 512KB L2 Cache only platform, but for flexible
platform implementations this pin should be a No Connect. Please refer to the
appropriate Platform Design Guide for implementation details.
The LINT[1:0] (Local APIC Interrupt) signals must connect the appropriate pins of
all APIC Bus agents, including all processors and the core logic or I/O APIC
component. When the APIC is disabled, the LINT0 signal becomes INTR, a
maskable interrupt request signal, and LINT1 becomes NMI, a nonmaskable
interrupt. INTR and NMI are backward compatible with the signals of those names
on the Intel® Pentium® processor. Both signals are asynchronous.
Both of these signals must be software configured via BIOS programming of the
APIC register space to be used either as NMI/INTR or LINT[1:0]. Because the APIC
is enabled by default after Reset, operation of these pins as LINT[1:0] is the default
configuration.
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Datasheet
Intel® Pentium® III Processor with 512KB L2 Cache at 1.13GHz to 1.40GHz
Table 39. Signal Description (Sheet 6 of 9)
Name
LOCK#
Type
I/O
Description
The LOCK# signal indicates to the system that a transaction must occur atomically.
This signal must connect the appropriate pins of all processor system bus agents.
For a locked sequence of transactions, LOCK# is asserted from the beginning of
the first transaction end of the last transaction.
When the priority agent asserts BPRI# to arbitrate for ownership of the processor
system bus, it will wait until it observes LOCK# deasserted. This enables symmetric
agents to retain ownership of the processor system bus throughout the bus locked
operation and ensure the atomicity of lock.
NCHCTRL
I
The NCHCTRL input signal provides AGTL pull-down strength control. The Intel®
Pentium® III processor with 512KB L2 Cache samples this input to determine the
N-channel device strength for pull-down when it is the driving agent. This signal
must be connected to a 14ohm resistor to VTT. Refer to the platform design guide
for implementation detail and resistor tolerance.
PICCLK
I
The PICCLK (APIC Clock) signal is an input clock to the processor and core logic or
I/O APIC which is required for operation of all processors, core logic, and I/O APIC
components on the APIC bus.
I/O
The PICD[1:0] (APIC Data) signals are used for bidirectional serial message
passing on the APIC bus, and must connect the appropriate pins of all processors
and core logic or I/O APIC components on the APIC bus.
PLL1, PLL2
I
All Intel® Pentium® III processors have an internal analog PLL clock generator that
requires a quiet power supply. PLL1 and PLL2 are inputs to this PLL and must be
connected to VCCCORE through a low pass filter that minimizes jitter. See the
platform design guide for implementation details.
PRDY#
O
The PRDY (Probe Ready) signal is a processor output used by debug tools to
determine processor debug readiness.
PREQ#
I
The PREQ# (Probe Request) signal is used by debug tools to request debug
operation of the processors.
PICD[1:0]
PWRGOOD
I
The PWRGOOD (Power Good) signal is processor input. The processor requires
this signal to be a clean indication that the clocks and power supplies (VCCCORE,
etc.) are stable and within their specifications. Clean implies that the signal will
remain low (capable of sinking leakage current), without glitches, from the time that
the power supplies are turned on until they come within specification. The signal
must then transition monotonically to a high state. PWRGOOD can be driven
inactive at any time, but clocks and power must again be stable before a
subsequent rising edge of PWRGOOD. It must also meet the minimum pulse width
specification in Table 17, and be followed by a 1 ms RESET# pulse.
The PWRGOOD signal must be supplied to the processor; it is used to protect
internal circuits against voltage sequencing issues. It should be driven high
throughout boundary scan operation.
REQ[4:0]#
Datasheet
I/O
The REQ[4:0]# (Request Command) signals must connect the appropriate pins of
all processor system bus agents. They are asserted by the current bus owner over
two clock cycles to define the currently active transaction type.
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Intel® Pentium® III Processor with 512KB L2 Cache at 1.13GHz to 1.40GHz
Table 39. Signal Description (Sheet 7 of 9)
Name
Type
Description
Asserting the RESET# signal resets all processors to known states and invalidates
their L1 and L2 caches without writing back any of their contents. For a power-on
Reset, RESET# must stay active for at least one millisecond after VCCCORE and
CLK have reached their proper specifications. On observing active RESET#, all
processor system bus agents will deassert their outputs within two clocks.
A number of bus signals are sampled at the active-to-inactive transition of RESET#
for power-on configuration. These configuration options are described in the
P6 Family of Processors Hardware Developer’s Manual for details.
RESET#
I
The processor may have its outputs tristated via power-on configuration. Otherwise,
if INIT# is sampled active during the active-to-inactive transition of RESET#, the
processor will execute its Built-in Self-Test (BIST). Whether or not BIST is
executed, the processor will begin program execution at the power on Reset vector
(default 0_FFFF_FFF0h). RESET# must connect the appropriate pins of all
processor system bus agents.
RESET# is the only AGTL signal which does not have on-die termination.
Therefore, it is necessary to place a discrete 56Ω resistor to VTT. Refer to the
platform design guide for implementation detail and resistor tolerance.
RESET2#
RP#
I/O
RS[2:0]#
I/O
RSP#
RTTCTRL
SLEWCTRL
SLP#
82
I
I
RESET2# pin is provided to differentiate the Intel® Pentium® III processor with
512KB L2 Cache from legacy Pentium® III processors. The Intel® Pentium® III
processor with 512KB L2 Cache. does not use the RESET2# pin. Refer to the
platform design guide for the proper connections of this signal.
The RP# (Request Parity) signal is driven by the request initiator, and provides
parity protection on ADS# and REQ[4:0]#. It must connect the appropriate pins of
all processor system bus agents.
A correct parity signal is high if an even number of covered signals are low and low
if an odd number of covered signals are low. This definition allows parity to be high
when all covered signals are high.
The RS[2:0]# (Response Status) signals are driven by the response agent (the
agent responsible for completion of the current transaction), and must connect the
appropriate pins of all processor system bus agents.
The RSP# (Response Parity) signal is driven by the response agent (the agent
responsible for completion of the current transaction) during assertion of RS[2:0]#,
the signals for which RSP# provides parity protection. It must connect the
appropriate pins of all processor system bus agents.
A correct parity signal is high if an even number of covered signals are low and low
if an odd number of covered signals are low. While RS[2:0]# = 000, RSP# is also
high, since this indicates it is not being driven by any agent guaranteeing correct
parity.
I
The RTTCTRL input signal provides AGTL termination control. The Intel®
Pentium® III processor with 512KB L2 Cache samples this input to set the
termination resistance value for the on-die AGTL termination. This signal must be
connected to a 56Ω resistor to Vss on a uni-processor platform or a 68Ω resistor to
Vss on a dual-processor platform. Refer to the platform design guide for
implementation detail and resistor tolerance.
I
The SLEWCTRL input signal provides AGTL slew rate control. The Intel®
Pentium® III processor with 512KB L2 Cache samples this input to determine the
slew rate for AGTL signals when it is the driving agent. This signal must be
connected to a 110Ω resistor to Vss. Refer to the platform design guide for
implementation detail and resistor tolerance.
I
The SLP# (Sleep) signal, when asserted in Stop-Grant state, causes processors to
enter the Sleep state. During Sleep state, the processor stops providing internal
clock signals to all units, leaving only the Phase-Locked Loop (PLL) still operating.
Processors in this state will not recognize snoops or interrupts. The processor will
recognize only assertions of the SLP#, STPCLK#, and RESET# signals while in
Sleep state. If SLP# is deasserted, the processor exits Sleep state and returns to
Stop-Grant state, restarting its internal clock signals to the bus and APIC processor
core units.
Datasheet
Intel® Pentium® III Processor with 512KB L2 Cache at 1.13GHz to 1.40GHz
Table 39. Signal Description (Sheet 8 of 9)
Name
Type
Description
I
The SMI# (System Management Interrupt) signal is asserted asynchronously by
system logic. On accepting a System Management Interrupt, processors save the
current state and enter System Management Mode (SMM). An SMI Acknowledge
transaction is issued, and the processor begins program execution from the SMM
handler.
STPCLK#
I
The STPCLK# (Stop Clock) signal, when asserted, causes processors to enter a
low power Stop-Grant state. The processor issues a Stop-Grant Acknowledge
transaction, and stops providing internal clock signals to all processor core units
except the bus and APIC units. The processor continues to snoop bus transactions
and latch interrupts while in Stop-Grant state. When STPCLK# is deasserted, the
processor restarts its internal clock to all units, services pending interrupts while in
the Stop-Grant state, and resumes execution. The assertion of STPCLK# has no
effect on the bus clock; STPCLK# is an asynchronous input.
TCK
I
The TCK (Test Clock) signal provides the clock input for the processor Test Bus
(also known as the Test Access Port).
TDI
I
The TDI (Test Data In) signal transfers serial test data into the processor. TDI
provides the serial input needed for JTAG specification support.
TDO
O
The TDO (Test Data Out) signal transfers serial test data out of the processor. TDO
provides the serial output needed for JTAG specification support.
THERMDN
O
Thermal Diode Cathode. Used to calculate core (junction) temperature. See
Section 4.1.
THERMDP
I
Thermal Diode Anode. Used to calculate core (junction) temperature. See Section
4.1.
SMI#
THERMTRIP#
O
The processor protects itself from catastrophic overheating by use of an internal
thermal sensor. This sensor is set well above the normal operating temperature to
ensure that there are no false trips. The processor will stop all execution when the
junction temperature exceeds approximately 135 °C. This is signaled to the system
by the THERMTRIP# (Thermal Trip) pin. Once activated, the signal remains
latched, and the processor stopped, until RESET# goes active or core power is
removed. There is no hysteresis built into the thermal sensor itself; as long as the
die temperature drops below the trip level, a RESET# pulse will reset the processor
and execution will continue. If the temperature has not dropped below the trip level,
the processor will continue to drive THERMTRIP# and remain stopped.
In the event the processor drives the THERMTRIP# signal active during valid
operation, both the Vcc and Vtt supplies to the processor must be turned off to
prevent thermal runaway of the processor. Valid operation refers to the operating
conditions where the THERMTRIP# signal is guaranteed valid. The time required
from THERMTRIP# asserted to Vcc rail at 1/2 nominal is 5 seconds and
THERMTRIP# asserted to Vtt rail at 1/2 nominal is 5 seconds. Once Vcc and Vtt
supplies are turned off the THERMTRIP# signal will be deactivated. System logic
should ensure no “unsafe” power cycling occurs due to this deassertion.
I
The TMS (Test Mode Select) signal is a JTAG specification support signal used by
debug tools.
TRDY#
I/O
The TRDY# (Target Ready) signal is asserted by the target to indicate that it is
ready to receive a write or implicit writeback data transfer. TRDY# must connect the
appropriate pins of all processor system bus agents.
TRST#
I
The TRST# (Test Reset) signal resets the Test Access Port (TAP) logic. TRST#
must be driven low during power on Reset.
VCMOS_REF
I
The VCMOS_REF input pin supplies non-AGTL reference voltage, which is typically 2/
3 of VCMOS. VCMOS_REF is used by the non-AGTL receivers to determine if a signal
is a logical 0 or a logical 1.
TMS
Datasheet
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Intel® Pentium® III Processor with 512KB L2 Cache at 1.13GHz to 1.40GHz
Table 39. Signal Description (Sheet 9 of 9)
Name
Type
Description
VID [3:0,25mV]
O
The VID[3:0, 25 mV] (Voltage ID) pins can be used to support automatic selection
of power supply voltages. These pins are CMOS signals that must be pulled up to
3.3V power rail with 1 KΩ resistors. The VID pins are needed to cleanly support
voltage specification variations on processors. See Table 3 for definitions of these
pins. The power supply must supply the voltage that is requested by these pins, or
disable itself.
VREF
I
The VREF input pins supply the AGTL reference voltage, which is typically 2/3 of
VTT. VREF is used by the AGTL receivers to determine if a signal is a logical 0 or a
logical 1.
I
The VTT_PWRGD signal informs the system that the VID/BSEL signals are in their
correct logic state. During Power-up, the VID signals will be in a indeterminate state
for a small period of time. The voltage regulator or the VRM should not sample and/
or latch the VID signals until the VTT_PWRGD signal is asserted. The assertion of
the VTT_PWRGD signal indicates the VID signals are stable and are driven to the
final state by the processor. Refer to Figure 6 for power-up timing sequence for the
VTT_PWRGD and the VID signals
VTT_PWRGD
7.2
Signal Summaries
Table 40 through Table 43 list attributes of the processor output, input, and I/O signals.
Table 40. Output Signals
Name
Active Level
Clock
Signal Group
BSEL[1:0]
High
Asynch
Power/Other
CPUPRES#
Low
Asynch
Power/Other
DETECT
High
Asynch
Power/Other
FERR#
Low
Asynch
CMOS Output
IERR#
Low
Asynch
CMOS Output
PRDY#
Low
BCLK
AGTL Output
TDO
High
TCK
TAP Output
THERMTRIP#
Low
Asynch
CMOS Output
VID[3:0, 25mV]
N/A
Asynch
Power/Other
Table 41. Input Signals (Sheet 1 of 2)
84
Name
Active Level
Clock
Signal Group
Qualified
A20M#
Low
Asynch
CMOS Input
Always1
BCLK
High
—
System Bus Clock
Always
BPRI#
Low
BCLK
AGTL Input
Always
DEFER#
Low
BCLK
AGTL Input
Always
FLUSH#
Low
Asynch
CMOS Input
Always1
IGNNE#
Low
Asynch
CMOS Input
Always1
INIT#
Low
Asynch
CMOS Input
Always1
INTR
High
Asynch
CMOS Input
APIC disabled mode
Datasheet
Intel® Pentium® III Processor with 512KB L2 Cache at 1.13GHz to 1.40GHz
Table 41. Input Signals (Sheet 2 of 2)
Name
Active Level
Clock
Signal Group
Qualified
KEY
N/A
Asynch
Power/Other
LINT[1:0]
High
Asynch
CMOS Input
APIC enabled mode
NMI
High
Asynch
CMOS Input
APIC disabled mode
NCHCTRL
N/A
Asynch
Power/Other
PICCLK
High
—
APIC Clock
Always
PREQ#
Low
Asynch
CMOS Input
Always
PWRGOOD
High
Asynch
CMOS Input
Always
RESET#
Low
BCLK
AGTL Input
Always
RESET2#
Low
BCLK
AGTL Input
RSP#
Low
BCLK
AGTL Input
RTTCTRL
N/A
Asynch
Power/Other
SLEWCTRL
N/A
Asynch
Power/Other
SLP#
Low
Asynch
CMOS Input
SMI#
Low
Asynch
CMOS Input
STPCLK#
Low
Asynch
CMOS Input
TCK
High
—
TAP Input
TDI
High
TCK
TAP Input
TMS
High
TCK
TAP Input
TRST#
Low
Asynch
TAP Input
VTT_PWRGD
High
Asynch
Power/Other
Always
During Stop-Grant state
NOTE: Synchronous assertion with active TDRY# ensures synchronization.
Datasheet
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Intel® Pentium® III Processor with 512KB L2 Cache at 1.13GHz to 1.40GHz
Table 42. Input/Output Signals (Single Driver)
Name
Active Level
Clock
Signal Group
Qualified
A[35:3]#
Low
BCLK
AGTL I/O
ADS#, ADS#+1
ADS#
Low
BCLK
AGTL I/O
Always
AP[1:0]#
Low
BCLK
AGTL I/O
ADS#, ADS#+1
BP[3:2]#
Low
BCLK
AGTL I/O
Always
BPM[1:0]#
Low
BCLK
AGTL I/O
Always
BR[1:0]#
Low
BCLK
AGTL I/O
Always
D[63:0]#
Low
BCLK
AGTL I/O
DRDY#
DBSY#
Low
BCLK
AGTL I/O
Always
DEP[7:0]#
Low
BCLK
AGTL I/O
DRDY#
DRDY#
Low
BCLK
AGTL I/O
Always
LOCK#
Low
BCLK
AGTL I/O
Always
REQ[4:0]#
Low
BCLK
AGTL I/O
ADS#, ADS#+1
RP#
Low
BCLK
AGTL I/O
ADS#, ADS#+1
RS[2:0]#
Low
BCLK
AGTL Input
Always
TRDY#
Low
BCLK
AGTL Input
Table 43. Input/Output Signals (Multiple Driver)
86
Name
Active Level
Clock
Signal Group
Qualified
AERR#
Low
BCLK
AGTL I/O
ADS#+3
BERR#
Low
BCLK
AGTL I/O
Always
BINIT#
Low
BCLK
AGTL I/O
Always
BNR#
Low
BCLK
AGTL I/O
Always
HIT#
Low
BCLK
AGTL I/O
Always
HITM#
Low
BCLK
AGTL I/O
Always
PICD[1:0]
High
PICCLK
APIC I/O
Always
Datasheet