Dual-Core Intel(R) Xeon(R) Processor 2.80 GHz Datasheet October 2005 Document Number: 309158-001 INFORMATION IN THIS DOCUMENT IS PROVIDED IN CONNECTION WITH INTEL(R) 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, life sustaining applications. Intel may make changes to specifications and product descriptions at any time, without notice. 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Intel, Pentium, Intel Xeon, SpeedStep, and Intel NetBurst are trademarks or registered trademarks of Intel Corporation or its subsidiaries in the United States and other countries. Intel(R) Extended Memory 64 Technology (Intel(R) EM64T) requires a computer system with a processor, chipset, BIOS, OS, device drivers and applications enabled for Intel EM64T. Processor will not operate (including 32-bit operation) without an Intel EM64T-enabled BIOS. Performance will vary depending on your hardware and software configurations. Intel EM64T-enabled OS, BIOS, device drivers and applications may not be available. Check with your vendor for more information. Hyper-Threading Technology requires a computer system with a Dual-Core Intel(R) Xeon(R) processor supporting HT Technology and a Hyper-Threading Technology enabled chipset, BIOS and operating system. Performance will vary depending on the specific hardware and software you use. See http://www.intel.com/info/hyperthreading/ for more information including details on which processors support HT Technology. * Other names and brands may be claimed as the property of others. Copyright (c) 2005, Intel Corporation 2 Dual-Core Intel(R) Xeon(R) Processor 2.80 GHz Datasheet Contents 1 Introduction....................................................................................................................... 11 1.1 Terminology......................................................................................................... 12 1.2 References .......................................................................................................... 14 1.3 State of Data ....................................................................................................... 14 2 Electrical Specifications.................................................................................................... 15 2.1 Front Side Bus and GTLREF .............................................................................. 15 2.2 Power and Ground Pins ...................................................................................... 16 2.3 Decoupling Guidelines ........................................................................................ 16 2.3.1 VCC Decoupling ..................................................................................... 16 2.3.2 VTT Decoupling...................................................................................... 16 2.3.3 Front Side Bus AGTL+ Decoupling ........................................................ 17 2.4 Front Side Bus Clock (BCLK[1:0]) and Processor Clocking................................ 17 2.4.1 Front Side Bus Frequency Select Signals (BSEL[1:0]) .......................... 17 2.4.2 Phase Lock Loop (PLL) and Filter.......................................................... 18 2.5 Voltage Identification (VID).................................................................................. 19 2.6 Reserved Or Unused Pins................................................................................... 21 2.7 Front Side Bus Signal Groups............................................................................. 21 2.8 GTL+ Asynchronous and AGTL+ Asynchronous Signals ................................... 23 2.9 Test Access Port (TAP) Connection.................................................................... 23 2.10 Mixing Processors ............................................................................................... 24 2.11 Absolute Maximum and Minimum Ratings .......................................................... 24 2.12 Processor DC Specifications............................................................................... 25 2.12.1 VCC Overshoot Specification.................................................................29 2.12.2 Die Voltage Validation ............................................................................ 30 3 Mechanical Specifications ................................................................................................ 33 3.1 Package Mechanical Drawings ........................................................................... 34 3.2 Processor Component Keepout Zones ............................................................... 37 3.3 Package Loading Specifications ......................................................................... 37 3.4 Package Handling Guidelines ............................................................................. 38 3.5 Package Insertion Specifications ........................................................................ 38 3.6 Processor Mass Specifications ........................................................................... 38 3.7 Processor Materials............................................................................................. 38 3.8 Processor Markings............................................................................................. 39 3.9 Processor Pin-Out Coordinates........................................................................... 40 4 Signal Definitions............................................................................................................. 43 4.1 Signal Definitions................................................................................................. 43 5 Pin Listing......................................................................................................................... 53 5.1 Dual-Core Intel(R) Xeon(R) Processor Pin Assignments.......................................... 53 5.1.1 Pin Listing by Pin Name ......................................................................... 53 5.1.2 Pin Listing by Pin Number ...................................................................... 62 Dual-Core Intel(R) Xeon(R) Processor 2.80 GHz Datasheet 3 6 Thermal Specifications.................................................................................................... 71 6.1 Package Thermal Specifications ......................................................................... 71 6.1.1 Thermal Specifications ........................................................................... 71 6.1.2 Thermal Metrology ................................................................................. 75 6.2 Processor Thermal Features............................................................................... 76 6.2.1 Thermal Monitor ..................................................................................... 76 6.2.2 On-Demand Mode.................................................................................. 77 6.2.3 PROCHOT# Signal Pin .......................................................................... 77 6.2.4 FORCEPR# Signal Pin .......................................................................... 77 6.2.5 THERMTRIP# Signal Pin ....................................................................... 78 6.2.6 TCONTROL and Fan Speed Reduction................................................. 78 6.2.7 Thermal Diode........................................................................................ 78 7 Features ........................................................................................................................... 79 7.1 Power-On Configuration Options ........................................................................ 79 7.2 Clock Control and Low Power States.................................................................. 79 7.2.1 Normal State .......................................................................................... 80 7.2.2 HALT or Enhanced HALT States ........................................................... 80 7.2.3 Stop-Grant State .................................................................................... 81 7.2.4 Enhanced HALT Snoop or HALT Snoop State, Stop Grant Snoop State ......................................................................... 82 7.2.5 Sleep State............................................................................................. 82 7.3 Enhanced Intel SpeedStep(R) Technology............................................................ 83 8 Boxed Processor Specifications....................................................................................... 85 8.1 Introduction ......................................................................................................... 85 8.2 Mechanical Specifications ................................................................................... 87 8.2.1 Boxed Processor Heat Sink Dimensions (CEK)..................................... 87 8.2.2 Boxed Processor Heat Sink Weight ....................................................... 95 8.2.3 Boxed Processor Retention Mechanism and Heat Sink Support (CEK) 95 8.3 Electrical Requirements ...................................................................................... 95 8.3.1 Power Supply Requirements.................................................................. 95 8.3.2 Fan Power Supply (Active CEK) ............................................................ 96 8.3.3 Boxed Processor Cooling Requirements ............................................... 97 8.4 Boxed Processor Contents ................................................................................. 98 9 Debug Tools Specifications.............................................................................................. 99 9.1 Debug Port System Requirements...................................................................... 99 9.2 Target System Implementation ........................................................................... 99 9.2.1 System Implementation.......................................................................... 99 9.3 Logic Analyzer Interface (LAI) ............................................................................ 99 9.3.1 Mechanical Considerations .................................................................. 100 9.3.2 Electrical Considerations...................................................................... 100 4 Dual-Core Intel(R) Xeon(R) Processor 2.80 GHz Datasheet Figures 2-1 2-2 2-3 2-4 2-5 3-1 3-2 3-3 3-4 3-5 3-6 3-7 6-1 6-2 7-1 8-1 8-2 8-3 8-4 8-5 8-6 8-7 8-8 8-9 8-10 8-11 8-12 On-Die Front Side Bus Termination .................................................................... 15 Phase Lock Loop (PLL) Filter Requirements ...................................................... 18 Dual-Core Intel(R) Xeon(R) Processor Load Current Vs. Time ................................ 27 VCC Static and Transient Tolerance................................................................... 29 VCC Overshoot Example Waveform................................................................... 30 Processor Package Assembly Sketch.................................................................33 Processor Package Drawing (Sheet 1 of 2) ........................................................ 35 Processor Package Drawing (Sheet 2 of 2) ........................................................ 36 Processor Top-Side Markings (Example)............................................................ 39 Processor Bottom-Side Markings (Example) ...................................................... 39 Processor Pin-out Coordinates, Top View .......................................................... 40 Processor Pin-out Coordinates, Bottom View ..................................................... 41 Dual-Core Intel(R) Xeon(R) Processor Thermal Profiles A and B ............................ 73 Case Temperature (TCASE) Measurement Location ......................................... 76 Stop Clock State Machine ................................................................................... 81 1U Passive CEK Heat Sink ................................................................................. 85 2U Passive CEK Heat Sink ................................................................................. 86 Active CEK Heat Sink (Representation Only) ..................................................... 86 Passive Thermal Solution (2U and larger) .......................................................... 87 Top Side Board Keep-Out Zones (Part 1) ........................................................... 88 Top Side Board Keep-Out Zones (Part 2) ........................................................... 89 Bottom Side Board Keep-Out Zones................................................................... 90 Board Mounting Hole Keep-Out Zones ............................................................... 91 Volumetric Height Keep-Ins................................................................................. 92 4-Pin Fan Cable Connector (For Active CEK Heat Sink) .................................... 93 4-Pin Base Board Fan Header (For Active CEK Heat Sink)................................ 94 Fan Cable Connector Pin Out for 4-Pin Active CEK Thermal Solution ............... 97 Dual-Core Intel(R) Xeon(R) Processor 2.80 GHz Datasheet 5 Tables 1-1 2-1 2-2 2-3 2-4 2-5 2-6 2-7 2-8 2-9 2-10 2-11 2-12 2-13 2-14 3-1 3-2 3-3 4-1 5-1 5-2 6-1 6-2 6-3 7-1 8-1 8-2 8-3 8-4 6 Features of the Dual-Core Intel(R) Xeon(R) Processor ............................................ 12 BSEL[1:0] Frequency Table ................................................................................ 17 Voltage Identification Definition2,3 ...................................................................... 20 Front Side Bus Signal Groups............................................................................. 22 Signal Description Table ..................................................................................... 23 Signal Reference Voltages.................................................................................. 23 Absolute Maximum and Minimum Ratings .......................................................... 24 Voltage and Current Specifications..................................................................... 25 VCC Static and Transient Tolerance................................................................... 28 VCC Overshoot Specifications ............................................................................ 29 BSEL[1:0] and VID[5:0] Signal Group DC Specifications.................................... 30 AGTL+ Signal Group DC Specifications ............................................................. 31 PWRGOOD Input and TAP Signal Group DC Specifications ............................. 31 GTL+ Asynchronous and AGTL+ Asynchronous Signal Group DC Specifications ...................................................................................................... 32 VIDPWRGD DC Specifications ........................................................................... 32 Processor Loading Specifications ....................................................................... 37 Package Handling Guidelines ............................................................................. 38 Processor Materials ............................................................................................ 38 Signal Definitions ................................................................................................ 43 Pin Listing by Pin Name ...................................................................................... 53 Pin Listing by Pin Number ................................................................................... 62 Dual-Core Intel(R) Xeon(R) Processor Thermal Specifications................................ 72 Dual-Core Intel(R) Xeon(R) Processor Thermal Profile A ........................................ 74 Dual-Core Intel(R) Xeon(R) Processor Thermal Profile B ........................................ 75 Power-On Configuration Option Pins .................................................................. 79 PWM Fan Frequency Specifications for 4-Pin Active CEK Thermal Solution ..... 96 Fan Specifications for 4-pin Active CEK Thermal Solution ................................. 96 Fan Cable Connector Pin Out for 4-Pin Active CEK Thermal Solution ............... 97 Fan Cable Connector Supplier & Part Number ................................................... 97 Dual-Core Intel(R) Xeon(R) Processor 2.80 GHz Datasheet Revision History Order Number Revision Number 309158 -001 Description * Initial release of the document. Date October 2005 Dual-Core Intel(R) Xeon(R) Processor 2.80 GHz Datasheet 7 8 Dual-Core Intel(R) Xeon(R) Processor 2.80 GHz Datasheet Features Includes 16-KB Level 1 data cache per core (2x16-KB) Dual-Core processing Available at 2.80 GHz processor speed Intel(R) Extended Memory 64 Technology (Intel(R) EM64T) 90 nm process technology Dual processing (DP) server support 2-MB Advanced Transfer Cache per core (2x2-MB, On-die, full speed Level 2 (L2) Cache) with 8-way associativity and Error Correcting Code (ECC) Binary compatible with applications running on previous members of Intel's IA-32 microprocessor line Intel(R) NetBurst(R) micro-architecture Enables system support of up to 64 GB of physical memory Hyper-Threading Technology allowing up to 8 threads per platform 144 Streaming SIMD Extensions 2 (SSE2) instructions Hardware support for multithreaded applications 13 Streaming SIMD Extensions 3 (SSE3) instructions 800 MHz system bus Rapid Execution Engine: Arithmetic Logic Units (ALUs) run at twice the processor core frequency Enhanced floating-point and multimedia unit for enhanced video, audio, encryption, and 3D performance Hyper Pipelined Technology System Management mode Advanced Dynamic Execution Thermal Monitor Very deep out-of-order execution Machine Check Architecture (MCA) Enhanced branch prediction Demand-Based Switching (DBS) with Enhanced Intel SpeedStep(R) Technology The Dual-Core Intel(R) Xeon(R) processor is designed for high-performance dual-processor server applications. Based on the Intel NetBurst(R) microarchitecture and Hyper-Threading Technology (HT Technology), it is binary compatible with previous Intel(R) Architecture (IA-32) processors. The Dual-Core Intel Xeon processor is scalable to two processors in a multiprocessor system, providing exceptional performance for applications running on advanced operating systems such as Windows* XP, Windows Server 2003, Linux*, and UNIX*. The Dual-Core Intel Xeon processor delivers compute power at unparalleled value and flexibility for powerful servers, internet infrastructure, and departmental server applications. The Intel NetBurst micro-architecture and Hyper-Threading Technology deliver outstanding performance and headroom for peak internet server workloads, resulting in faster response times, support for more users, and improved scalability. Dual-Core Intel(R) Xeon(R) Processor 2.80 GHz Datasheet 9 10 Dual-Core Intel(R) Xeon(R) Processor 2.80 GHz Datasheet 1 Introduction The Dual-Core Intel(R) Xeon(R) processor is Intel's first dual core product for dual-processor server platforms and utilizes two physical Intel NetBurst(R) microarchitecture cores in one package. As well, it maintains compatibility with IA-32 software while also supporting 64-bit computing with Intel(R) Extended Memory 64 Technology (Intel(R) EM64T). The processor also features Hyper Pipelined Technology, a Rapid Execution Engine, and an Execution Trace Cache. The 800 MHz system bus is a quad-pumped bus running off a 200 MHz system clock making 6.4 GB per second data transfer rates possible. The Execution Trace Cache is a level 1 cache that stores decoded micro-operations, which removes the decoder from the main execution path, thereby increasing performance. In addition, enhanced thermal and power management capabilities are implemented including Thermal Monitor and Enhanced Intel SpeedStep(R) Technology. These capabilities are targeted for dual processor (DP) servers in data center and office environments. Thermal monitor provides efficient and effective cooling in high temperature situations. Enhanced Intel SpeedStep(R) allows trade-offs to be made between performance and power consumption. This may lower average power consumption (in conjunction with OS support). The Dual-Core Intel(R) Xeon(R) processor supports Hyper-Threading Technology. This feature allows a single, physical processor to function as four logical processors (2 logical processors per core). While some execution resources such as caches, execution units, and buses are shared, each logical processor has its own architecture state with its own set of general-purpose registers, control registers to provide increased system responsiveness in multitasking environments, and headroom for next generation multithreaded applications. More information on Hyper-Threading Technology can be found at http://www.intel.com/technology/hyperthread. The Dual-Core Intel Xeon processor also includes the Execute Disable Bit capability previously available in Intel(R) Itanium(R) processors. This feature, when combined with a supported operating system, allows memory to be marked as executable or non-executable. If code attempts to run in non-executable memory, the processor raises an error to the operating system. This feature can prevent some classes of viruses or worms that exploit buffer overrun vulnerabilities and can thus help improve the overall security of the system. See the IA-32 Intel(R) Architecture Software Developer's Manual for more detailed information. Other features within the Intel NetBurst microarchitecture include Advanced Dynamic Execution, Advanced Transfer Cache, enhanced floating point and multi-media unit, Streaming SIMD Extensions 2 (SSE2) and Streaming SIMD Extensions 3 (SSE3). Advanced Dynamic Execution improves speculative execution and branch prediction internal to the processor. The Advanced Transfer Cache in each core is a 2 MB level 2 (L2) cache. The floating point and multi-media units include 128-bit wide registers and a separate register for data movement. Streaming SIMD2 (SSE2) instructions provide highly efficient double-precision floating point, SIMD integer, and memory management operations. In addition, SSE3 instructions have been added to further extend the capabilities of Intel processor technology. Other processor enhancements include core frequency improvements and microarchitectural improvements. The Dual-Core Intel Xeon processor supports Intel Extended Memory 64 Technology (Intel EM64T) as an enhancement to Intel's IA-32 architecture. This enhancement allows the processor to execute operating systems and applications written to take advantage of the 64-bit extension technology. Further details on Intel Extended Memory 64 Technology and its programming model can be found in the IA-32 Intel(R) Architecture Software Developer's Manual. Dual-Core Intel(R) Xeon(R) Processor 2.80 GHz Datasheet 11 Introduction The Dual-Core Intel Xeon processor is intended for high performance server systems with up to two processors on one system bus. The processor will be packaged in a 604-pin Flip Chip Micro Pin Grid Array (FC-mPGA4) package and will utilize a surface mount Zero Insertion Force (ZIF) socket (mPGA604). Table 1-1. Features of the Dual-Core Intel(R) Xeon(R) Processor # of Supported Symmetric Agents L2 Advanced Transfer Cache Front Side Bus Frequency Package 1-4 2 MB per Core 800 MHz 604-pin FC-mPGA4 Dual-Core Intel(R) Xeon(R) processor The Dual-Core Intel Xeon processor-based platforms implement independent power planes for each system bus agent. As a result, the processor core voltage (VCC) and system bus termination voltage (VTT) must connect to separate supplies. The processor core voltage utilizes power delivery guidelines denoted by VRM 10.1 and the associated load line (see Voltage Regulator Module (VRM) and Enterprise Voltage Regulator-Down (EVRD) 10.1 Design Guidelines for further details). Implementation details can be obtained by referring to the applicable platform design guidelines. The Dual-Core Intel Xeon processor uses a scalable system bus protocol referred to as the "system bus" in this document. The system bus utilizes a split-transaction, deferred reply protocol. The system bus uses Source-Synchronous Transfer (SST) of address and data to improve performance. The processor transfers data four times per bus clock (4X data transfer rate, as in AGP 4X). Along with the 4X data bus, the address bus can deliver addresses two times per bus clock and is referred to as a `double-clocked' or the 2X address bus. In addition, the Request Phase completes in one clock cycle. Working together, the 4X data bus and 2X address bus provide a data bus bandwidth of up to 6.4 GBytes/second (6400 MBytes/second). Finally, the system bus is also used to deliver interrupts. 1.1 Terminology A `#' symbol after a signal name refers to an active low signal, indicating a signal is in the asserted state when driven to a low level. For example, when RESET# is low, a reset has been requested. Conversely, 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). "Front side bus" or "System bus" refers to the interface between the processor, system core logic (a.k.a. the chipset components), and other bus agents. The system bus is a multiprocessing interface to processors, memory, and I/O. For this document, "front side bus" or "system bus" are used as generic terms for the "Dual-Core Intel Xeon processor system bus". Commonly used terms are explained here for clarification: * Dual-Core Intel Xeon processor -- Intel's first dual-core 64/32-bit microprocessor intended for dual processor servers. The Dual-Core Intel Xeon processor is based on Intel's 90 nanometer process and has a 2 MB per core level 2 (L2) cache. The Dual-Core Intel Xeon processor will utilize the mPGA604 socket. For this document, "processor" is used as the generic term for the "Dual-Core Intel(R) Xeon(R) Processor". * Central Agent -- The central agent is the host bridge to the processor and is typically known as the chipset. 12 Dual-Core Intel(R) Xeon(R) Processor 2.80 GHz Datasheet Introduction * EVRD (Enterprise Voltage Regulator Down) -- DC-DC converter integrated onto the system board that provide the correct voltage and current for the processor based on the logic state of the VID bits. * FC-mPGA4 (Flip Chip Micro Pin Grid Array) Package -- The processor package is a Flip Chip Micro Pin Grid Array (FC-mPGA4), consisting of a processor cores mounted on a pinned substrate with an integrated heat spreader (IHS). This package technology employs a 1.27 mm [0.05 in.] pitch for the processor pins. * Front Side Bus (FSB) -- The electrical interface that connects the processor to the chipset. Also referred to as the processor system bus or the system bus. All memory and I/O transactions, as well as interrupt messages, pass between the processor and the chipset over the FSB. * Functional Operation -- Refers to the normal operating conditions in which all processor specifications, including DC, system bus, signal quality, mechanical and thermal are satisfied. * Integrated Heat Spreader (IHS) -- A component of the processor package used to enhance the thermal performance of the package. Component thermal solutions interface with the processor at the IHS surface. * mPGA604 socket -- The Dual-Core Intel Xeon processor mates with the baseboard through this surface mount, 604-pin, zero insertion force (ZIF) socket. See the mPGA604 Socket Design Guidelines for details regarding this socket. * Processor cores -- The processor's execution engines. All signal integrity specifications are to the pads of the processor cores. * Storage Conditions -- Refers to a non-operational state. The processor may be installed in a platform, in a tray, or loose. Processors may be sealed in packaging or exposed to free air. Under these conditions, processor pins should not be connected to any supply voltages, have any I/Os biased or receive any clocks. * Symmetric agent -- A symmetric agent is a processor which shares the same I/O subsystem and memory array, and runs the same operating system as another processor in a system. Systems using symmetric agents are known as Symmetric Multiprocessor (SMP) systems. The Dual-Core Intel Xeon processor should only be used in SMP systems which have two or fewer agents. * Thermal Design Power -- Processor/chipset thermal solution should be designed to this target. It is the highest expected sustainable power while running known power-intensive real applications. TDP is not the maximum power that the processor/chipset can dissipate. * VRM (Voltage Regulator Module) -- DC-DC converter built onto a module that interfaces with an appropriate card edge socket that supplies the correct voltage and current to the processor. * VCC -- The processor core power supply. * VSS -- The processor ground. * VTT -- The system bus termination voltage. Dual-Core Intel(R) Xeon(R) Processor 2.80 GHz Datasheet 13 Introduction 1.2 References Material and concepts available in the following documents may be beneficial when reading this document. Document Intel Order Number mPGA604 Socket Design Guidelines 254239 AP-485, Intel(R) Processor Identification and CPUID Instruction 241618 ATX12V Power Supply Design Guide http://formfactors.org Entry-Level Electronics-Bay Specifications: A Server System Infrastructure (SSI) Specification for Entry Pedestal Servers and Workstations http://www.ssiforum.org EPS12V Power Supply Design Guide: A Server System Infrastructure (SSI) Specification for Entry Chassis Power Supplies http://www.ssiforum.org IA-32 Intel(R) Architecture Optimization Reference Manual IA-32 Intel(R) 248966 Architecture Software Developer's Manual Volume 1: Basic Architecture 253665 Volume 2A: Instruction Set Reference, A-M 253666 Volume 2B: Instruction Set Reference, N-Z 253667 Volume 3: System Programming Guide 253668 Dual-Core Intel(R) Xeon(R) Processor Boundary Scan Descriptor Language (BSDL) Model (V1.0) and Cell Descriptor File (V1.0) ITP700 Debug Port Design Guide 249679 Dual-Core Intel(R) Xeon(R) Processor 2.80 GHz Specification Update Thin Electronics Bay Specification (A Server System Infrastructure (SSI) Specification for Rack Optimized Servers) Voltage Regulator Module (VRM) and Enterprise Voltage Regulator-Down (EVRD) 10.1 Design Guidelines http://www.ssiforum.org 302732 NOTE: Contact your Intel representative for the latest revision of the documents without document numbers. 1.3 State of Data The data contained within this document is subject to change. It is the most accurate information available by the publication date of this document 14 Dual-Core Intel(R) Xeon(R) Processor 2.80 GHz Datasheet 2 Electrical Specifications 2.1 Front Side Bus and GTLREF Most Dual-Core Intel Xeon processor front side bus (FSB) signals use Assisted Gunning Transceiver Logic (AGTL+) signaling technology. This technology provides improved noise margins and reduced ringing through low voltage swings and controlled edge rates. AGTL+ buffers are open-drain and require pull-up resistors to provide the high logic level and termination. AGTL+ output buffers differ from GTL+ buffers with the addition of an active pMOS pull-up transistor to "assist" the pull-up resistors during the first clock of a low-to-high voltage transition. Platforms implement a termination voltage level for AGTL+ signals defined as VTT. Because platforms implement separate power planes for each processor (and chipset), separate VCC and VTT supplies are necessary. This configuration allows for improved noise tolerance as processor frequency increases. Speed enhancements to data and address busses have caused signal integrity considerations and platform design methods to become even more critical than with previous processor families. Design guidelines for the processor front side bus are detailed in the appropriate platform design guide (refer to Section 1.2). The AGTL+ inputs require a reference voltage (GTLREF) which is used by the receivers to determine if a signal is a logical 0 or a logical 1. GTLREF must be generated on the baseboard. Please refer to the applicable platform design guidelines for details. Termination resistors (RTT) for AGTL+ signals are provided on the processor silicon and are terminated to VTT. The on-die termination resistors are a selectable feature and can be enabled or disabled via the ODTEN signal. For end bus agents, on-die termination resistors are enabled to control reflections on the transmission line. For the middle bus agent, on-die termination RTT resistors must be disabled. Intel chipsets will also provide on-die termination, thus eliminating the need to terminate the bus on the baseboard for most AGTL+ signals. Processor wired-OR signals may also include additional on-die resistors (RL) to further insure proper noise margin and signal integrity. RL is not configurable and is always enabled for these signals. Figure 2-1 illustrate the active on-die termination. Figure 2-1. On-Die Front Side Bus Termination E n d A ge n t M id d le A g en t V TT R TT S igna l S igna l RL R TT - O n -d ie te rm in atio n resisto rs fo r A G T L + s ign a ls R L - A d d itio n al o n -d ie resista n ce im p lem en ted fo r p ro p er n o ise m argin an d sig n al in teg rity (w ired -O R sig n als o n ly) Note: Some AGTL+ signals do not include on-die termination (RTT) and must be terminated on the baseboard. See Table 2-4 for details regarding these signals. Dual-Core Intel(R) Xeon(R) Processor 2.80 GHz Datasheet 15 Electrical Specifications 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 simulation of the front side bus, including trace lengths, is highly recommended when designing a system. 2.2 Power and Ground Pins For clean on-chip power distribution, the processor has 181 VCC (power) and 185 VSS (ground) inputs. All VCC pins must be connected to the processor power plane, while all VSS pins must be connected to the system ground plane. The processor VCC pins must be supplied with the voltage determined by the processor Voltage IDentification (VID) pins. Eleven signals are denoted as VTT, which provide termination for the front side bus and power to the I/O buffers. The platform must implement a separate supply for these pins, which meets the VTT specifications outlined in Table 2-7. 2.3 Decoupling Guidelines Due to its large number of transistors and high internal clock speeds, the Dual-Core Intel Xeon processor is capable of generating large average current swings between low and full power states. This may cause voltages on power planes to sag below their minimum values if bulk decoupling is not adequate. Larger bulk storage (CBULK), such as electrolytic or aluminum-polymer capacitors, supply current during longer lasting changes in current demand by the component, such as coming out of an idle condition. Similarly, they act as a storage well for current when entering an idle condition from a running condition. Care must be taken in the baseboard design to ensure that the voltage provided to the processor remains within the specifications listed in Table 2-7. Failure to do so can result in timing violations or reduced lifetime of the component. For further information and guidelines, refer to the appropriate platform design guidelines. 2.3.1 VCC Decoupling Regulator solutions need to provide bulk capacitance with a low Effective Series Resistance (ESR) and the baseboard designer must assure a low interconnect resistance from the voltage regulator (VRD or VRM pins) to the mPGA604 socket. The power delivery solution must insure the voltage and current specifications are met (defined in Table 2-7). For further information regarding power delivery, decoupling, and layout guidelines, refer to the appropriate platform design guidelines. 2.3.2 VTT Decoupling Decoupling must be provided on the baseboard. Decoupling solutions must be sized to meet the expected load. To insure optimal performance, various factors associated with the power delivery solution must be considered including regulator type, power plane and trace sizing, and component placement. A conservative decoupling solution would consist of a combination of low ESR bulk capacitors and high frequency ceramic capacitors. For further information regarding power delivery, decoupling and layout guidelines, refer to the appropriate platform design guidelines. 16 Dual-Core Intel(R) Xeon(R) Processor 2.80 GHz Datasheet Electrical Specifications 2.3.3 Front Side Bus AGTL+ Decoupling The Dual-Core Intel Xeon processor integrates signal termination on the die, as well as part of the required high frequency decoupling capacitance on the processor package. However, additional high frequency capacitance must be added to the baseboard to properly decouple the return currents from the front side bus. Bulk decoupling must also be provided by the baseboard for proper AGTL+ bus operation. Decoupling guidelines are described in the appropriate platform design guidelines. 2.4 Front Side Bus Clock (BCLK[1:0]) and Processor Clocking BCLK[1:0] directly controls the front side bus interface speed as well as the core frequency of the processor. As in previous processor generations, the Dual-Core Intel Xeon processor core frequency is a multiple of the BCLK[1:0] frequency. The processor bus ratio multiplier will be set during manufacturing. The default setting will be the maximum speed for the processor. It will be possible to override this setting using software (see the IA-32 Intel(R) Architecture Software Developer's Manual, Volume 3). This will permit operation at a speed lower than the processor's tested frequency. The BCLK[1:0] inputs directly control the operating speed of the front side bus interface. The processor core frequency is configured during reset by using values stored internally during manufacturing. The stored value sets the highest bus fraction at which the particular processor can operate. If lower speeds are desired, the appropriate ratio can be configured by setting bits [15:8] of the IA32_FLEX_BRVID_SEL MSR. For details of operation at core frequencies lower than the maximum rated processor speed, refer to the IA-32 Intel(R) Architecture Software Developer's Manual, Volume 3. Clock multiplying within the processor is provided by the internal phase locked loop (PLL), which requires a constant frequency BCLK[1:0] input, with exceptions for spread spectrum clocking. The Dual-Core Intel Xeon processor utilizes differential clocks. Table 2-1 contains core frequency to front side bus multipliers and their corresponding core frequencies. 2.4.1 Front Side Bus Frequency Select Signals (BSEL[1:0]) BSEL[1:0] are open-drain outputs, which must be pulled up to VTT, and are used to select the front side bus frequency. Please refer to Table 2-10 for DC specifications. Table 2-1 defines the possible combinations of the signals and the frequency associated with each combination. The frequency is determined by the processor(s), chipset, and clock synthesizer. All front side bus agents must operate at the same core and front side bus frequencies. Individual processors will only operate at their specified front side bus clock frequency. See the appropriate platform design guide for further details. Table 2-1. BSEL[1:0] Frequency Table BSEL1 BSEL0 Bus Clock Frequency 0 0 Reserved 0 1 Reserved 1 0 200 MHz 1 1 Reserved Dual-Core Intel(R) Xeon(R) Processor 2.80 GHz Datasheet 17 Electrical Specifications 2.4.2 Phase Lock Loop (PLL) and Filter VCCA and VCCIOPLL are power sources required by the PLL clock generators on the Dual-Core Intel Xeon processor. Since these PLLs are analog in nature, they require quiet power supplies for minimum jitter. Jitter is detrimental to the system: it degrades external I/O timings as well as internal core timings (i.e., maximum frequency). To prevent this degradation, these supplies must be low pass filtered from VTT. The AC low-pass requirements are as follows: * * * * < 0.2 dB gain in pass band < 0.5 dB attenuation in pass band < 1 Hz > 34 dB attenuation from 1 MHz to 66 MHz > 28 dB attenuation from 66 MHz to core frequency The filter requirements are illustrated in Figure 2-2. For recommendations on implementing the filter refer to the appropriate platform design guidelines. Figure 2-2. Phase Lock Loop (PLL) Filter Requirements 0.2 dB 0 dB -0.5 dB forbidden zone -28 dB forbidden zone -34 dB DC passband 1 Hz fpeak 1 MHz 66 MHz fcore high frequency band NOTES: 1. 2. 3. 4. 18 Diagram not to scale. No specifications for frequencies beyond fcore (core frequency). fpeak, if existent, should be less than 0.05 MHz. fcore represents the maximum core frequency supported by the platform. Dual-Core Intel(R) Xeon(R) Processor 2.80 GHz Datasheet Electrical Specifications 2.5 Voltage Identification (VID) The Voltage Identification (VID) specification for the Dual-Core Intel Xeon processor is defined by the Voltage Regulator Module (VRM) and Enterprise Voltage Regulator-Down (EVRD) 10.1 Design Guidelines. The voltage set by the VID signals is the maximum voltage allowed by the processor (please see Section 2.12.1 for VCC overshoot specifications). VID signals are open drain outputs, which must be pulled up to VTT. Please refer to Table 2-10 for the DC specifications for these signals. A minimum voltage is provided in Table 2-7 and changes with frequency. This allows processors running at a higher frequency to have a relaxed minimum voltage specification. The specifications have been set such that one voltage regulator can operate with all supported frequencies. Individual processor VID values may be calibrated during manufacturing such that two devices at the same core speed may have different default VID settings. This is reflected by the VID range values provided in Table 2-7. Refer to the Dual-Core Intel(R) Xeon(R) Processor 2.80 GHz Specification Update for further details on specific valid core frequency and VID values of the processor. The Dual-Core Intel Xeon processor uses six voltage identification signals, VID[5:0], to support automatic selection of power supply voltages. Table 2-2 specifies the voltage level corresponding to the state of VID[5:0]. A `1' in this table refers to a high voltage level and a `0' refers to a low voltage level. If the processor socket is empty (VID[5:0] = x11111), or the voltage regulation circuit cannot supply the voltage that is requested, it must disable itself. See the Voltage Regulator Module (VRM) and Enterprise Voltage Regulator-Down (EVRD) 10.1 Design Guidelines for further details. The Dual-Core Intel Xeon processor provides the ability to operate while transitioning to an adjacent VID and its associated processor core voltage (VCC). This will represent a DC shift in the load line. It should be noted that a low-to-high or high-to-low voltage state change may result in as many VID transitions as necessary to reach the target core voltage. Transitions above the specified VID are not permitted. Table 2-7 includes VID step sizes and DC shift ranges. Minimum and maximum voltages must be maintained as shown in Table 2-8 and Figure 2-4. The VRM or VRD utilized must be capable of regulating its output to the value defined by the new VID. DC specifications for dynamic VID transitions are included in Table 2-7 and Table 2-8. Please refer to the Voltage Regulator Module (VRM) and Enterprise Voltage Regulator-Down (EVRD) 10.1 Design Guidelines for further details. Power source characteristics must be guaranteed to be stable whenever the supply to the voltage regulator is stable. Dual-Core Intel(R) Xeon(R) Processor 2.80 GHz Datasheet 19 Electrical Specifications Table 2-2. Voltage Identification Definition2,3 VID5 VID4 VID3 VID2 VID1 VID0 VCC_MAX VID5 VID4 VID3 VID2 VID1 VID0 VCC_MAX 0 0 1 0 1 0 0.8375 0 1 1 0 1 0 1.2125 1 0 1 0 0 1 0.8500 1 1 1 0 0 1 1.2250 0 0 1 0 0 1 0.8625 0 1 1 0 0 1 1.2375 1 0 1 0 0 0 0.8750 1 1 1 0 0 0 1.2500 0 0 1 0 0 0 0.8875 0 1 1 0 0 0 1.2625 1 0 0 1 1 1 0.9000 1 1 0 1 1 1 1.2750 0 0 0 1 1 1 0.9125 0 1 0 1 1 1 1.2875 1 0 0 1 1 0 0.9250 1 1 0 1 1 0 1.3000 0 0 0 1 1 0 0.9375 0 1 0 1 1 0 1.3125 1 0 0 1 0 1 0.9500 1 1 0 1 0 1 1.3250 0 0 0 1 0 1 0.9625 0 1 0 1 0 1 1.3375 1 0 0 1 0 0 0.9750 1 1 0 1 0 0 1.3500 0 0 0 1 0 0 0.9875 0 1 0 1 0 0 1.3625 1 0 0 0 1 1 1.0000 1 1 0 0 1 1 1.3750 0 0 0 0 1 1 1.0125 0 1 0 0 1 1 1.3875 1 0 0 0 1 0 1.0250 1 1 0 0 1 0 1.4000 0 0 0 0 1 0 1.0375 0 1 0 0 1 0 1.4125 1 0 0 0 0 1 1.0500 1 1 0 0 0 1 1.4250 0 0 0 0 0 1 1.0625 0 1 0 0 0 1 1.4375 1 0 0 0 0 0 1.0750 1 1 0 0 0 0 1.4500 0 0 0 0 0 0 1.0875 0 1 0 0 0 0 1.4625 1 OFF1 1 0 1 1 1 1 1.4750 0 0 1 1 1 1 1.4875 1 1 1 1 1 0 1 1 1 1 1 OFF1 1 1 1 1 1 0 1.1000 1 0 1 1 1 0 1.5000 0 1 1 1 1 0 1.1125 0 0 1 1 1 0 1.5125 1 1 1 1 0 1 1.1250 1 0 1 1 0 1 1.5250 0 1 1 1 0 1 1.1375 0 0 1 1 0 1 1.5375 1 1 1 1 0 0 1.1500 1 0 1 1 0 0 1.5500 0 1 1 1 0 0 1.1625 0 0 1 1 0 0 1.5625 1 1 1 0 1 1 1.1750 1 0 1 0 1 1 1.5750 0 1 1 0 1 1 1.1875 0 0 1 0 1 1 1.5875 1 1 1 0 1 0 1.2000 1 0 1 0 1 0 1.6000 NOTES: 1. When this VID pattern is observed, the voltage regulator output should be disabled. 2. Shading denotes the expected default VID range during normal operation for the Dual-Core Intel Xeon processor [1.2875 V 1.4125 V]. Please note this is subject to change. 3. Shaded areas do not represent the entire range of VIDs that may be driven by the processor. Events causing dynamic VID transitions (See Section 2.5) may result in a more broad range of VID values. 20 Dual-Core Intel(R) Xeon(R) Processor 2.80 GHz Datasheet Electrical Specifications 2.6 Reserved Or Unused Pins All Reserved pins must remain unconnected. Connection of these pins to VCC, VTT, VSS, or to any other signal (including each other) can result in component malfunction or incompatibility with future processors. See Section 5 for a pin listing of the processor and the location of all Reserved pins. For reliable operation, always connect unused inputs or bidirectional signals to an appropriate signal level. In a system level design, on-die termination has been included by the processor to allow end agents to be terminated within the processor silicon for most signals. In this context, end agent refers to the bus agent that resides on either end of the daisy-chained front side bus interface while a middle agent is any bus agent in between the two end agents. For end agents, most unused AGTL+ inputs should be left as no connects as AGTL+ termination is provided on the processor silicon. However, see Table 2-4 for details on AGTL+ signals that do not include on-die termination. For middle agents, the on-die termination must be disabled, so the platform must ensure that unused AGTL+ input signals which do not connect to end agents are connected to VTT via a pull-up resistor. Unused active high inputs, should be connected through a resistor to ground (VSS). Unused outputs can be left unconnected, however this may interfere with some TAP functions, complicate debug probing, and prevent boundary scan testing. 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. Resistor values should be within 20% of the impedance of the baseboard trace for front side bus signals. For unused AGTL+ input or I/O signals, use pull-up resistors of the same value as the on-die termination resistors (RTT). TAP, Asynchronous GTL+ inputs, and Asynchronous GTL+ outputs do not include on-die termination. Inputs and utilized outputs must be terminated on the baseboard. Unused outputs may be terminated on the baseboard or left unconnected. Note that leaving unused outputs unterminated may interfere with some TAP functions, complicate debug probing, and prevent boundary scan testing. Signal termination for these signal types is discussed in the ITP700 Debug Port Design Guide (See Section 1.2) All TESTHI[6:0] pins should be individually connected to VTT via a pull-up resistor which matches the nominal trace impedance. TESTHI[3:0] and TESTHI[6:5] may be tied together and pulled up to VTT with a single resistor if desired. However, utilization of boundary scan test will not be functional if these pins are connected together. TESTHI4 must always be pulled up independently from the other TESTHI pins. For optimum noise margin, all pull-up resistor values used for TESTHI[6:0] pins should have a resistance value within 20 % of the impedance of the board transmission line traces. For example, if the nominal trace impedance is 50 , then a value between 40 and 60 should be used. N/C (no connect) pins of the processor are not utilized by the processor. There is no connection from the pin to the die. These pins may perform functions in future processors intended for platforms utilizing the Dual-Core Intel Xeon processor. Refer to the applicable platform design guidelines for guidance that pertains to any pin labeled N/C in this document. 2.7 Front Side Bus Signal Groups The front side bus signals have been combined into groups by buffer type. AGTL+ input signals have differential input buffers, which use GTLREF as a reference level. 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. AGTL+ asynchronous outputs can become active anytime and include an active pMOS pull-up transistor to assist during the first clock of a low-to-high voltage transition. Dual-Core Intel(R) Xeon(R) Processor 2.80 GHz Datasheet 21 Electrical Specifications With the implementation of a source synchronous data bus comes the need to specify two sets of timing parameters. One set is for common clock signals whose timings are specified with respect to rising edge of BCLK0 (ADS#, HIT#, HITM#, etc.) and the second set is for the source synchronous signals which are relative to their respective strobe lines (data and address) as well as rising edge of BCLK0. Asynchronous signals are still present (A20M#, IGNNE#, etc.) and can become active at any time during the clock cycle. Table 2-3 identifies which signals are common clock, source synchronous and asynchronous. Table 2-3. Front Side Bus Signal Groups Signal Group Signals1 Type AGTL+ Common Clock Input Synchronous to BCLK[1:0] BPRI#, BR[3:1]#2,3, DEFER#, RESET#, RS[2:0]#, RSP#, TRDY# AGTL+ Common Clock I/O Synchronous to BCLK[1:0] ADS#, AP[1:0]#, BINIT#4, BNR#4, BPM[5:0]#, BR0#2,3, DBSY#, DP[3:0]#, DRDY#, HIT#4, HITM#4, LOCK#, MCERR#4 AGTL+ Source Synchronous I/O Synchronous to assoc. strobe Signals Associated Strobe REQ[4:0]#,A[16:3]#3 ADSTB0# A[35:17]#3 ADSTB1# D[15:0]#, DBI0# DSTBP0#, DSTBN0# D[31:16]#, DBI1# DSTBP1#, DSTBN1# D[47:32]#, DBI2# DSTBP2#, DSTBN2# D[63:48]#, DBI3# DSTBP3#, DSTBN3# AGTL+ Strobe I/O Synchronous to BCLK[1:0] ADSTB[1:0]#, DSTBP[3:0]#, DSTBN[3:0]# AGTL Asynchronous Output Asynchronous FERR#/PBE#, IERR#, PROCHOT# GTL+ Asynchronous Input Asynchronous A20M#, FORCEPR#, IGNNE#, INIT#3, LINT0/ INTR, LINT1/NMI, SMI#3, SLP#, STPCLK# GTL+ Asynchronous Output Asynchronous THERMTRIP# Front Side Bus Clock Clock BCLK1, BCLK0 TAP Input Synchronous to TCK TCK, TDI, TMS, TRST# TAP Output Synchronous to TCK TDO Power/Other Power/Other BOOT_SELECT, BSEL[1:0], COMP[0], GTLREF[3:0], ODTEN, OPTIMIZED/COMPAT#, PWRGOOD, Reserved, SKTOCC#, SLEW_CTRL, SMB_PRT, TEST_BUS, TESTHI[6:0], THERMDA, THERMDC, VCC, VCCA, VCCIOPLL, VCCPLL, VCCSENSE, VID[5:0], VSS, VSSA, VSSSENSE, VTT, VIDPWRGD, VTTEN NOTES: 1. Refer to Section 4 for signal descriptions. 2. The Dual-Core Intel Xeon processor utilizes all four of the BR0#, BR1#, BR2# and BR3# signals. For additional details regarding the BR[3:0]# signals, see Section 4 and Section 7.1. 3. The value of these pins during the active-to-inactive edge of RESET# defines the processor configuration options. See Section 7.1 for details. 4. These signals may be driven simultaneously by multiple agents (wired-OR). Table 2-4 outlines the signals which include on-die termination (RTT) and lists signals which include additional on-die resistance (RL). Table 2-5 provides signal reference voltages. 22 Dual-Core Intel(R) Xeon(R) Processor 2.80 GHz Datasheet Electrical Specifications Table 2-4. Signal Description Table Signals with RTT A[35:3]#, ADS#, ADSTB[1:0]#, AP[1:0]#, BINIT#, BNR#, BOOT_SELECT2, BPRI#, D[63:0]#, DBI[3:0]#, DBSY#, DEFER#, DP[3:0]#, DRDY#, DSTBN[3:0]#, DSTBP[3:0]#, FORCEPR#, HIT#, HITM#, LOCK#, MCERR#, OPTIMIZED/COMPAT#2, REQ[4:0]#, RS[2:0]#, RSP#, TEST_BUS, TRDY# Signals with RL BINIT#, BNR#, HIT#, HITM#, MCERR# NOTES: 1. Signals that do not have RTT, nor are actively driven to their high voltage level. 2. The termination for these signals is not RTT. The OPTIMIZED/COMPAT# and BOOT_SELECT pins have a 500 - 5000 pull-up to VTT. Table 2-5. Signal Reference Voltages GTLREF 0.5 * VTT A20M#, A[35:3]#, ADS#, ADSTB[1:0]#, AP[1:0]#, BINIT#, BNR#, BPM[5:0]#, BPRI#, BR[3:0]#, D[63:0]#, DBI[3:0]#, DBSY#, DEFER#, DP[3:0]#, DRDY#, DSTBN[3:0]#, DSTBP[3:0]#, FORCEPR#, HIT#, HITM#, IGNNE#, INIT#, LINT0/INTR, LINT1/ NMI, LOCK#, MCERR#, ODTEN, RESET#, REQ[4:0]#, RS[2:0]#, RSP#, SLP#, SMI#, STPCLK#, TRDY# BOOT_SELECT, OPTIMIZED/COMPAT#, PWRGOOD1, TCK1, TDI1, TMS1, TRST#1, VIDPWRGD NOTES: 1. These signals also have hysteresis added to the reference voltage. See Table 2-12 for more information. 2.8 GTL+ Asynchronous and AGTL+ Asynchronous Signals The Dual-Core Intel Xeon processor does not utilize CMOS voltage levels on any signals that connect to the processor silicon. As a result, input signals such as A20M#, FORCEPR#, IGNNE#, INIT#, LINT0/INTR, LINT1/NMI, SMI#, SLP#, and STPCLK# utilize GTL input buffers. Legacy output THERMTRIP# utilizes a GTL+ output buffers. All of these Asynchronous GTL+ signals follow the same DC requirements as GTL+ signals, however the outputs are not driven high (during the logical 0-to-1 transition) by the processor. FERR#/PBE#, IERR#, and IGNNE# have now been defined as AGTL+ asynchrnous signals as they include an active p-MOS device. GTL+ asynchronous and AGTL+ asynchronous signals do not have setup or hold time specifications in relation to BCLK[1:0]. However, all of the GTL+ asynchronous and AGTL+ asynchronous signals are required to be asserted/deasserted for at least six BCLKs in order for the processor to recognize them. See Table 2-13 for the DC specifications for the asynchronous GTL+ signal groups. 2.9 Test Access Port (TAP) Connection Due to the voltage levels supported by other components in the Test Access Port (TAP) logic, it is recommended that the processor(s) be first in the TAP chain and followed by any other components within the system. A translation buffer should be used to connect to the rest of the chain unless one Dual-Core Intel(R) Xeon(R) Processor 2.80 GHz Datasheet 23 Electrical Specifications of the other components is capable of accepting an input of the appropriate voltage. Similar considerations must be made for TCK, TMS, and TRST#. Two copies of each signal may be required with each driving a different voltage level. 2.10 Mixing Processors Intel only supports and validates dual processor configurations in which both Dual-Core Intel Xeon processor operate with the same front side bus frequency, core frequency, and have the same internal cache sizes. Mixing components operating at different internal clock frequencies is not supported and will not be validated by Intel [Note: Processors within a system must operate at the same frequency per bits [15:8] of the IA32_FLEX_BRVID_SEL MSR; however this does not apply to frequency transitions initiated due to thermal events, Enhanced Intel SpeedStep technology transitions, or assertion of the FORCEPR# signal (See Section 6)]. Not all operating systems can support dual processors with mixed frequencies. Intel does not support or validate operation of processors with different cache sizes. Mixing processors of different steppings but the same model (as per CPUID instruction) is supported. Please see the Dual-Core Intel(R) Xeon(R) Processor 2.80 GHz Specification Update (see Section 1.2) for the applicable mixed stepping table. Details regarding the CPUID instruction are provided in the IA-32 Intel(R) Architecture Software Developer's Manual, Volume 3: System Programmer's Guide and the AP-485 Intel(R) Processor Identification and the CPUID Instruction application note. 2.11 Absolute Maximum and Minimum Ratings Table 2-6 specifies absolute maximum and minimum ratings. Within functional operation limits, functionality and long-term reliability can be expected. At conditions outside functional operation condition limits, but within absolute maximum and minimum ratings, neither functionality nor long term reliability can be expected. If a device is returned to conditions within functional operation limits after having been subjected to conditions outside these limits, but within the absolute maximum and minimum ratings, the device may be functional, but with its lifetime degraded depending on exposure to conditions exceeding the functional operation condition limits. At conditions exceeding absolute maximum and minimum ratings, neither functionality nor longterm reliability can be expected. Moreover, if a device is subjected to these conditions for any length of time then, when returned to conditions within the functional operating condition limits, it will either not function, or its reliability will be severely degraded. Although the processor contains protective circuitry to resist damage from static electric discharge, precautions should always be taken to avoid high static voltages or electric fields. Table 2-6. Absolute Maximum and Minimum Ratings Symbol 24 Parameter Min Max Unit VCC Core voltage with respect to VSS -0.30 1.55 V VTT System bus termination voltage with respect to VSS -0.30 1.55 V TCASE Processor case temperature TSTORAGE Storage temperature See Section 6 See Section 6 -40 85 Notes1,2 C C 3,4 Dual-Core Intel(R) Xeon(R) Processor 2.80 GHz Datasheet Electrical Specifications NOTES: 1. For functional operation, all processor electrical, signal quality, mechanical and thermal specifications must be satisfied. 2. Overshoot and undershoot voltage guidelines for input, output, and I/O signals are outlined in Section 3. Excessive overshoot or undershoot on any signal will likely result in permanent damage to the processor. 3. Storage temperature is applicable to storage conditions only. In this scenario, the processor must not receive a clock, and no pins can be connected to a voltage bias. Storage within these limits will not affect the longterm reliability of the device. For functional operation, please refer to the processor case temperature specifications. 4. This rating applies to the processor and does not include any tray or packaging. 2.12 Processor DC Specifications The processor DC specifications in this section are defined at the processor core (pads) unless noted otherwise. See Section 5 for the Dual-Core Intel Xeon processor pin listings and Section 4 for signal definitions. Voltage and current specifications are detailed in Table 2-7. For platform power delivery planning refer to Table 2-8, which provides VCC static and transient tolerances. This same information is presented graphically in Figure 2-4. BSEL[1:0] and VID[5:0] signals are specified in Table 2-10. The DC specifications for the AGTL+ signals are listed in Table 2-11. The DC specifications for the PWRGOOD input and TAP signal group are listed in Table 2-12 and the Asynchronous GTL+ signal group is listed in Table 2-13. The VIDPWRGD signal is detailed in Table 2-14. Table 2-7 through Table 2-14 list the DC specifications for the processor and are valid only while meeting specifications for case temperature (TCASE as specified in Section 6), clock frequency, and input voltages. Care should be taken to read all notes associated with each parameter. Table 2-7. Voltage and Current Specifications (Sheet 1 of 2) Symbol VID range VCC VID Transition Parameter Min VID range 1.2875 Typ Max Unit Notes 1 1.4125 V 2,3 VID - ICC (max) * 1.25 m V 3,4,5,6 VID step size during a transition 12.5 mV 17 Total allowable DC load line shift from VID steps 450 mV 18 1.224 V 7 6 VCC for processors with multiple VIDs See Table 2-8 and Figure 2-4 VTT Front Side Bus termination voltage (DC specification) ICC ICC for processors with multiple VIDs 120 A ICC_RESET ICC_RESET for processor with multiple VIDs 120 A ITT Front Side Bus end-agent VTT current 4.8 A 9 ITT Front Side Bus mid-agent VTT current 1.5 A 10 ICC_VCCA ICC for PLL power pins 120 mA 11 ICC_VCCIOPLL ICC for PLL power pins 100 mA 11 1.176 Dual-Core Intel(R) Xeon(R) Processor 2.80 GHz Datasheet 1.20 16 25 Electrical Specifications Table 2-7. Voltage and Current Specifications (Sheet 2 of 2) Symbol Parameter Min Typ Max Unit Notes 1 ICC for GTLREF pins 200 A 12 ISGNT ISLP ICC Stop Grant 56 A 13 ITCC ICC TCC Active ICC A 14 ICC_TDC Thermal Design Current 105 A 15 ICC_GTLREF NOTES: 1. Unless otherwise noted, all specifications in this table apply to all processors. These specifications are based on silicon characteristics, however they may be updated as further data becomes available. List frequencies are not necessarily committed production frequencies. 2. Each processor is programmed with a maximum valid voltage identification (VID) values, which is set at manufacturing and can not be altered. Individual maximum VID values are calibrated during manufacturing such that two processors at the same frequency may have different settings within the VID range. Please note this differs from the VID employed by the processor during a power management event (Enhanced HALT State). 3. These voltages are targets only. A variable voltage source should exist on systems in the event that a different voltage is required. See Section 2.5 for more information. 4. The voltage specification requirements are measured across vias on the platform for the VCCSENSE and VSSSENSE pins close to the socket with a 100 MHz bandwidth oscilloscope, 1.5 pF maximum probe capacitance, and 1 M minimum impedance. The maximum length of ground wire on the probe should be less than 5 mm. Ensure external noise from the system is not coupled in the scope probe. 5. Refer to Table 2-8 and corresponding Figure 2-4. The processor should not be subjected to any static VCC level that exceeds the VCC_MAX associated with any particular current. Failure to adhere to this specification can shorten processor lifetime. 6. Minimum VCC and maximum ICC are specified at the maximum processor case temperature (TCASE) shown in Table 6-1. ICC_MAX is specified at the relative VCC_MAX point on the VCC load line. The processor is capable of drawing ICC_MAX for up to 10 ms. Refer to Figure 2-3 for further details on the average processor current draw over various time durations. 7. VTT must be provided via a separate voltage source and must not be connected to VCC. This specification is measured at the pin. 8. Baseboard bandwidth is limited to 20 MHz. 9. This specification refers to a single processor with RTT enabled. Please note the end agent and middle agent may not require ITT(max) simultaneously. This parameter is based on design characterization and not tested. 10.This specification refers to a single processor with RTT disabled. Please note the end agent and middle agent may not require ITT(max) simultaneously. 11.These specifications apply to the PLL power pins VCCA, VCCIOPLL, and VSSA. See Section 2.4.2 for details. These parameters are based on design characterization and are not tested. 12.This specification represents a total current for all GTLREF pins. 13.The current specified is also for HALT State. 14.The maximum instantaneous current the processor will draw while the thermal control circuit is active as indicated by the assertion of the PROCHOT# signal is the maximum ICC for the processor. 15.ICC_TDC (Thermal Design Current) is the sustained (DC equivalent) current that the processor is capable of drawing indefinitely and should be used for the voltage regulator temperature assessment. The voltage regulator is responsible for monitoring its temperature and asserting the necessary signal to inform the processor of a thermal excursion. Please see the applicable design guidelines for further details. The processor is capable of drawing ICC_TDC indefinitely. Refer to Figure 2-3 for further details on the average processor craw over various time durations. This parameter is based on design characterization and is not tested. 16.ICC_RESET is specified while PWRGOOD and RESET# are asserted. 17.This specification represents the VCC reduction due to each VID transition. See Section 2.5. 18.This specification refers to the potential total reduction of the load line due to VID transitions below the specified VID. 26 Dual-Core Intel(R) Xeon(R) Processor 2.80 GHz Datasheet Electrical Specifications Figure 2-3. Dual-Core Intel(R) Xeon(R) Processor Load Current Vs. Time V RM 10.1 Current 125 Sustained Current (A) 120 115 110 105 100 0.01 0.1 1 10 100 1000 Time Duration (s) NOTES: 1. Processor or voltage regulator thermal protection circuitry should not trip for load currents greater than ICC_TDC. 2. Not 100% tested. Specified by design characterization. Dual-Core Intel(R) Xeon(R) Processor 2.80 GHz Datasheet 27 Electrical Specifications Table 2-8. VCC Static and Transient Tolerance ICC 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 115 120 Voltage Deviation from VID Setting (V) 1,2,3 VCC_Max VCC_Typ VCC_Min VID - 0.000 VID - 0.020 VID - 0.040 VID - 0.006 VID - 0.026 VID - 0.046 VID - 0.013 VID - 0.033 VID - 0.052 VID - 0.019 VID - 0.039 VID - 0.059 VID - 0.025 VID - 0.045 VID - 0.065 VID - 0.031 VID - 0.051 VID - 0.071 VID - 0.038 VID - 0.058 VID - 0.077 VID - 0.044 VID - 0.064 VID - 0.084 VID - 0.050 VID - 0.070 VID - 0.090 VID - 0.056 VID - 0.076 VID - 0.096 VID - 0.063 VID - 0.083 VID - 0.103 VID - 0.069 VID - 0.089 VID - 0.109 VID - 0.075 VID - 0.095 VID - 0.115 VID - 0.081 VID - 0.101 VID - 0.121 VID - 0.087 VID - 0.108 VID - 0.128 VID - 0.094 VID - 0.114 VID - 0.134 VID - 0.100 VID - 0.120 VID - 0.140 VID - 0.106 VID - 0.126 VID - 0.146 VID - 0.113 VID - 0.133 VID - 0.153 VID - 0.119 VID - 0.139 VID - 0.159 VID - 0.125 VID - 0.145 VID - 0.165 VID - 0.131 VID - 0.151 VID - 0.171 VID - 0.138 VID - 0.158 VID - 0.178 VID - 0.144 VID - 0.164 VID - 0.184 VID - 0.150 VID - 0.170 VID - 0.190 NOTES: 1. The VCC_MIN and VCC_MAX loadlines represent static and transient limits. Please see Section 2.12.1 for VCC overshoot specifications. 2. This table is intended to aid in reading discrete points on Figure 2-4. 3. The loadlines specify voltage limits at the die measured at the VCCSENSE and VSSSENSE pins. Voltage regulation feedback for voltage regulator circuits must be taken from processor VCC and VSS pins. Refer to the Enterprise Voltage Regulator-Down (EVRD) 10.1 Design Guidelines for socket loadline guidelines and VR implementation. 28 Dual-Core Intel(R) Xeon(R) Processor 2.80 GHz Datasheet Electrical Specifications Figure 2-4. VCC Static and Transient Tolerance Icc [A] 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 115 120 VID - 0.000 VID - 0.020 VCC Maximum VID - 0.040 VID - 0.060 Vcc [V] VID - 0.080 VID - 0.100 VID - 0.120 VCC Typical VID - 0.140 VCC Minimum VID - 0.160 VID - 0.180 VID - 0.200 NOTES: 1. The VCC_MIN and VCC_MAX loadlines represent static and transient limits. Please see Section 2.12.1 for VCC overshoot specifications. 2. The VCC_MIN and VCC_MAX loadlines are plots of the discrete point found in Table 2-8. 3. Refer to Table 2-7 for processor VID information. 4. The loadlines specify voltage limits at the die measured at the VCCSENSE and VSSSENSE pins. Voltage regulation feedback for voltage regulator circuits must be taken from processor VCC and VSS pins. Refer to the Enterprise Voltage Regulator-Down (EVRD) 10.1 Design Guidelines for socket loadline guidelines and VR implementation. 2.12.1 VCC Overshoot Specification The Dual-Core Intel Xeon processor can tolerate short transient overshoot events where VCC exceeds the VID voltage when transitioning from a high-to-low current load condition. This overshoot cannot exceed VID + VOS_MAX. (VOS_MAX is the maximum allowable overshoot above VID). These specifications apply to the processor die voltage as measured across the VCCSENSE and VSSSENSE pins. Table 2-9. VCC Overshoot Specifications Symbol Parameter VOS_MAX TOS_MAX Max Units Figure Magnitude of VCC overshoot above VID 0.050 V 2-5 Time duration of VCC overshoot above VID 25 s 2-5 Dual-Core Intel(R) Xeon(R) Processor 2.80 GHz Datasheet Min Notes 29 Electrical Specifications Figure 2-5. VCC Overshoot Example Waveform Example Overshoot Waveform VOS Voltage [V] VID + 0.050 VID - 0.000 TOS 0 5 10 15 20 25 Time [us] TOS: Overshoot time above VID VOS: Overshoot above VID NOTES: 1. VOS is measured overshoot voltage. 2. TOS is measured time duration above VID. 2.12.2 Die Voltage Validation Overshoot events from application testing on processor must meet the specifications in Table 2-9 when measured across the VCCSENSE and VSSSENSE pins. Overshoot events that are < 10 ns in duration may be ignored. These measurement of processor die level overshoot should be taken with a 100 MHz bandwidth limited oscilloscope. Table 2-10. BSEL[1:0] and VID[5:0] Signal Group DC Specifications Symbol Parameter Min Typ Max Units Notes1 RON BSEL[1:0] and VID[5:0] Buffer On Resistance N/A 60 2 IOL Maximum Pin Current N/A 8 mA 2 ILO Output Leakage Current N/A 200 A 2,3 RPULL_UP Pull-Up Resistor 4 VTOL Voltage Tolerance V 4 500 0.95 * VTT VTT 1.05 * VTT NOTES: 1. 2. 3. 4. 30 Unless otherwise noted, all specifications in this table apply to all processor frequencies. These parameters are based on design characterization and are not tested. Leakage to VSS with pin held at VTT. Please refer to the appropriate platform design guide for implementation details. Dual-Core Intel(R) Xeon(R) Processor 2.80 GHz Datasheet Electrical Specifications Table 2-11. AGTL+ Signal Group DC Specifications Symbol Parameter Min Max Unit Notes1 VIL Input Low Voltage 0.0 GTLREF - (0.10 * VTT) V 2,3 VIH Input High Voltage GTLREF + (0.10 * VTT) VTT V 2,4,5 VOH Output High Voltage 0.90 * VTT VTT V 2,5 IOL Output Low Current N/A VTT / (0.50 * RTT_MIN + [RON_MIN || RL]) mA 2,6 ILI Input Leakage Current N/A 200 A 7,8 ILO Output Leakage Current N/A 200 A 7,8 RON Buffer On Resistance 4 8 NOTES: 1. 2. 3. 4. 5. Unless otherwise noted, all specifications in this table apply to all processor frequencies. The VTT represented in these specifications refers to instantaneous VTT. VIL is defined as the voltage range at a receiving agent that will be interpreted as a logical low value. VIH is defined as the voltage range at a receiving agent that will be interpreted as a logical high value. VIH and VOH may experience excursions above VTT. However, input signal drivers must comply with the signal quality specifications in Section 3. 6. Refer to Table 2-4 to determine which signals include additional on-die termination resistance (RL). 7. Leakage to VSS with pin held at VTT. 8. Leakage to VTT with pin held at 300 mV. Table 2-12. PWRGOOD Input and TAP Signal Group DC Specifications Symbol Notes Parameter Min Max Unit Input Hysteresis 200 350 mV 3 Vt+ Input Low to High Threshold Voltage 0.5 * (VTT + VHYS_MIN) 0.5 * (VTT + VHYS_MAX) V 4 Vt- Input High to Low Threshold Voltage 0.5 * (VTT - VHYS_MAX) 0.5 * (VTT - VHYS_MIN) V 4 VOH Output High Voltage N/A VTT V 4 IOL Output Low Current 45 mA 6 ILI Input Leakage Current N/A 200 A ILO Output Leakage Current N/A 200 A RON Buffer On Resistance 4 8 VHYS 1,2,5 NOTES: 1. Unless otherwise noted, all specifications in this table apply to all processor frequencies. 2. All outputs are open drain. 3. VHYS represents the amount of hysteresis, nominally centered about 0.5 * VTT for all PWRGOOD and TAP inputs. 4. The VTT represented in these specifications refers to instantaneous VTT. 5. PWRGOOD input and the TAP signal group must meet system signal quality specification in Section 3. 6. The maximum output current is based on maximum current handling capability of the buffer and is not specified into the test load. Dual-Core Intel(R) Xeon(R) Processor 2.80 GHz Datasheet 31 Electrical Specifications Table 2-13. GTL+ Asynchronous and AGTL+ Asynchronous Signal Group DC Specifications Parameter Min Max Unit Notes1 VIL Input Low Voltage 0.0 GTLREF - (0.10 * VTT) V 2,3 VIH Input High Voltage GTLREF + (0.10 * VTT) VTT V 2,4,5 VOH Output High Voltage 0.90 * VTT VTT V 2,5 IOL Output Low Current N/A VTT / (0.50 * RTT_MIN + [RON_MIN || RL]) mA 2,6 ILI Input Leakage Current N/A 200 A 7,8 ILO Output Leakage Current N/A 200 A 7,8 Ron Buffer On Resistance 4 8 Symbol NOTES: 1. 2. 3. 4. 5. Unless otherwise noted, all specifications in this table apply to all processor frequencies. The VTT represented in these specifications refers to instantaneous VTT. VIL is defined as the voltage range at a receiving agent that will be interpreted as a logical low value. VIH is defined as the voltage range at a receiving agent that will be interpreted as a logical high value. VIH and VOH may experience excursions above VTT. However, input signal drivers must comply with the signal quality specifications in Section 3. 6. Refer to Table 2-5 to determine which signals include additional on-die termination resistance (RL). 7. Leakage to VSS with pin held at VTT. 8. Leakage to VTT with pin held at 300 mV. Table 2-14. VIDPWRGD DC Specifications Symbol Parameter Min Max Unit VIL Input Low Voltage 0.0 0.30 V VIH Input High Voltage 0.90 VTT V Notes 32 Dual-Core Intel(R) Xeon(R) Processor 2.80 GHz Datasheet 3 Mechanical Specifications The Dual-Core Intel Xeon processor is packaged in Flip Chip Micro Pin Grid Array (FC-mPGA4) package that interfaces to the baseboard via an mPGA604 socket. The package consists of a processor core mounted on a substrate pin-carrier. An integrated heat spreader (IHS) is attached to the package substrate and core and serves as the mating surface for processor component thermal solutions, such as a heatsink. Figure 3-1 shows a sketch of the processor package components and how they are assembled together. Refer to the mPGA604 Socket Design Guidelines for complete details on the mPGA604 socket. The package components shown in Figure 3-1 include the following: 1. Integrated Heat Spreader (IHS) 2. Processor Die 3. Substrate 4. Pin Side Capacitors 5. Package Pin 6. Die Side Capacitors Figure 3-1. Processor Package Assembly Sketch 1 2 6 3 4 Note: 5 This drawing is not to scale and is for reference only. The mPGA604 socket is not shown. Dual-Core Intel(R) Xeon(R) Processor 2.80 GHz Datasheet 33 Mechanical Specifications 3.1 Package Mechanical Drawings The package mechanical drawings are shown in Figure 3-2 and Figure 3-3. The drawings include dimensions necessary to design a thermal solution for the processor. These dimensions include: 1. Package reference and tolerance dimensions (total height, length, width, etc.) 2. IHS parallelism and tilt 3. Pin dimensions 4. Top-side and back-side component keepout dimensions 5. Reference datums All drawing dimensions are in mm [in.]. 34 Dual-Core Intel(R) Xeon(R) Processor 2.80 GHz Datasheet Mechanical Specifications Figure 3-2. Processor Package Drawing (Sheet 1 of 2) Dual-Core Intel(R) Xeon(R) Processor 2.80 GHz Datasheet 35 Mechanical Specifications Figure 3-3. Processor Package Drawing (Sheet 2 of 2) 36 Dual-Core Intel(R) Xeon(R) Processor 2.80 GHz Datasheet Mechanical Specifications 3.2 Processor Component Keepout Zones The processor may contain components on the substrate that define component keepout zone requirements. A thermal and mechanical solution design must not intrude into the required keepout zones. Decoupling capacitors are typically mounted to either the topside or pin-side of the package substrate. See Figure 3-3 for keepout zones. 3.3 Package Loading Specifications Table 3-1 provides dynamic and static load specifications for the processor package. These mechanical load limits should not be exceeded during heatsink assembly, mechanical stress testing or standard drop and shipping conditions. The heatsink attach solutions must not include continuous stress onto the processor with the exception of a uniform load to maintain the heatsinkto-processor thermal interface. Also, any mechanical system or component testing should not exceed these limits. The processor package substrate should not be used as a mechanical reference or load-bearing surface for thermal or mechanical solutions. Table 3-1. Processor Loading Specifications Parameter Min Max Unit Notes Static Compressive Load 44 10 222 50 N lbf 1,2,3,4 44 10 288 65 N lbf 1,2,3,5 NA NA 222 N + 0.45 kg *100 G 50 lbf (static) + 1 lbm * 100 G N lbf 1,3,4,6,7 NA NA 288 N + 0.45 kg * 100 G 65 lbf (static) + 1 lbm * 100 G N lbf 1,3,5,6,7 NA 445 100 N lbf 1,3,8 Dynamic Compressive Load Transient NOTES: 1. These specifications apply to uniform compressive loading in a direction perpendicular to the IHS top surface. 2. This is the minimum and maximum static force that can be applied by the heatsink and retention solution to maintain the heatsink and processor interface. 3. These specifications are based on limited testing for design characterization. Loading limits are for the package only and do not include the limits of the processor socket. 4. This specification applies for thermal retention solutions that allow baseboard deflection. 5. This specification applies either for thermal retention solutions that prevent baseboard deflection or for the Intel enabled reference solution (CEK). 6. Dynamic loading is defined as an 11 ms duration average load superimposed on the static load requirement. 7. Experimentally validated test condition used a heatsink mass of 1 lbm (~0.45 kg) with 100 G acceleration measured at heat sink mass. The dynamic portion of this specification in the product application can have flexibility in specific values, but the ultimate product of mass times acceleration should not exceed this validated dynamic load (1 lbm x 100 G = 100 lb). Allowable strain in the dynamic compressive load specification is in addition to the strain allowed in static loading. 8. Transient loading is defined as a 2 second duration peak load superimposed on the static load requirement, representative of loads experienced by the package during heatsink installation. Dual-Core Intel(R) Xeon(R) Processor 2.80 GHz Datasheet 37 Mechanical Specifications 3.4 Package Handling Guidelines Table 3-2 includes a list of guidelines on a package handling in terms of recommended maximum loading on the processor IHS relative to a fixed substrate. These package handling loads may be experienced during heatsink removal. Table 3-2. Package Handling Guidelines Parameter Maximum Recommended Notes Shear 356 N 80 lbf 1,4,5 Tensile 156 N 35 lbf 2,4,5 Torque 8 N-m 70 lbf-in 3,4,5 NOTES: 1. A shear load is defined as a load applied to the IHS in a direction parallel to the IHS top surface. 2. A tensile load is defined as a pulling load applied to the IHS in a direction normal to the IHS surface. 3. A torque load is defined as a twisting load applied to the IHS in an axis of rotation normal to the IHS top surface. 4. These guidelines are based on limited testing for design characterization and incidental applications (one time only). 5. Handling guidelines are for the package only and do not include the limits of the processor socket. 3.5 Package Insertion Specifications The Dual-Core Intel Xeon processor can be inserted and removed 15 times from an mPGA604 socket, which meets the criteria outlined in the mPGA604 Socket Design Guidelines. 3.6 Processor Mass Specifications The typical mass of the Dual-Core Intel Xeon processor is approximately 35.750 grams. This mass [weight] includes all components which make up the entire processor product. 3.7 Processor Materials The Dual-Core Intel Xeon processor is assembled from several components. The basic material properties are described in Table 3-3. Table 3-3. Processor Materials Component Integrated Heat Spreader (IHS) Substrate Substrate Pins 38 Material Nickel Plated Copper Fiber-Reinforced Resin Gold Plated Copper Dual-Core Intel(R) Xeon(R) Processor 2.80 GHz Datasheet Mechanical Specifications 3.8 Processor Markings Figure 3-4 shows the topside markings and Figure 3-5 shows the bottom-side markings on the processor. These diagrams are to aid in the identification of the Dual-Core Intel Xeon processor. Figure 3-4. Processor Top-Side Markings (Example) P ro c e s s o r N am e i(m ) (c) '0 4 2 D M a trix In c lu d e s A T P O a n d S e ria l N u m b e r (fro n t e n d m a rk ) ATPO S e ria l N u m b e r P in 1 In d ic a to r NOTES: 1. All characters will be in upper case. 2. Drawing is not to scale. Figure 3-5. Processor Bottom-Side Markings (Example) Pin 1 Indicator Speed / Cache / Bus / Voltage Pin Field Cavity with Components 2800DP/4MB/800/1.350V SL6NY COSTA RICA S-Spec C0096109-0021 Country of Assy FPO - Serial # (13 Characters) Text Line1 Text Line2 Text Line3 NOTES: 1. All characters will be in upper case. 2. Drawing is not to scale. Dual-Core Intel(R) Xeon(R) Processor 2.80 GHz Datasheet 39 Mechanical Specifications 3.9 Processor Pin-Out Coordinates Figure 3-6 and Figure 3-7 show the top and bottom view of the processor pin coordinates, respectively. The coordinates are referred to throughout the document to identify processor pins. Figure 3-6. Processor Pin-out Coordinates, Top View COMMON CLOCK 3 5 7 9 11 13 A B C D E F G H J K L M N P R T 15 17 19 21 23 Async / JTAG 25 27 29 31 A B C D E F G H J K L M N P R T U V W Y AA AB AC Dual-Core Dual Core (R) (R) Xeon Intel Intel(R) XeonTM Processor Processor Top View U V W Y AA AB AC AD AE AD AE 2 4 6 8 10 12 14 CLOCKS 16 18 20 22 24 26 28 30 DATA = Signal = Power = Ground 40 Vcc/Vss Vcc/Vss 1 COMMON CLOCK ADDRESS = VCC_3.3 = GTLREF = Reserved/No Connect Dual-Core Intel(R) Xeon(R) Processor 2.80 GHz Datasheet Mechanical Specifications Figure 3-7. Processor Pin-out Coordinates, Bottom View Async / JTAG 29 27 25 23 21 19 A B C D E F G H J K L M N P R T COMMON CLOCK ADDRESS 17 15 13 11 9 7 5 3 1 A B C D E F G H J K L M N P R T U V W Y AA Dual-Core Dual Core (R) Intel(R) XeonTM Xeon Intel(R) Processor Processor Bottom View U V W Y AA AB AC AD AE Vcc/Vss Vcc/Vss 31 COMMON CLOCK AB AC AD AE 30 28 26 24 22 20 18 16 14 12 10 8 6 2 CLOCKS DATA = Signal = Power = Ground 4 = VCC_VID = GTLREF = Reserved/No Connect Dual-Core Intel(R) Xeon(R) Processor 2.80 GHz Datasheet 41 Mechanical Specifications 42 Dual-Core Intel(R) Xeon(R) Processor 2.80 GHz Datasheet 4 Signal Definitions 4.1 Signal Definitions Table 4-1. Signal Definitions (Sheet 1 of 10) Name A[35:3]# Type Description Notes I/O A[35:3]# (Address) define a 236-byte physical memory address space. In sub-phase 1 of the address phase, these pins transmit the address of a transaction. In sub-phase 2, these pins transmit transaction type information. These signals must connect the appropriate pins of all agents on the front side bus. A[35:3]# are protected by parity signals AP[1:0]#. A[35:3]# are source synchronous signals and are latched into the receiving buffers by ADSTB[1:0]#. 3 On the active-to-inactive transition of RESET#, the processors sample a subset of the A[35:3]# pins to determine their power-on configuration. See Section 7.1. A20M# I If A20M# (Address-20 Mask) 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 1 MB boundary. Assertion of A20M# is only supported in real mode. 2 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. ADS# I/O ADS# (Address Strobe) 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 (800 MHz) front side bus agents. 3 ADSTB[1:0]# I/O Address strobes are used to latch A[35:3]# and REQ[4:0]# on their rising and falling edge. Strobes are associated with signals as shown below. 3 AP[1:0]# I/O Signals Associated Strobes REQ[4:0]#, A[16:3]# ADSTB0# A[35:17]# ADSTB1# AP[1:0]# (Address Parity) are driven by the request initiator along with ADS#, A[35:3]#, and the transaction type on the REQ[4:0]# pins. 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 3 when all the covered signals are high. AP[1:0]# should connect the appropriate pins of all Dual-Core Intel(R) Xeon(R) processor front side bus agents. The following table defines the coverage model of these signals. Request Signals Subphase 1 Subphase 2 A[35:24]# AP0# AP1# A[23:3]# AP1# AP0# REQ[4:0]# AP1# AP0# Dual-Core Intel(R) Xeon(R) Processor 2.80 GHz Datasheet 43 Signal Definitions Table 4-1. Signal Definitions (Sheet 2 of 10) Name BCLK[1:0] Type I Description The differential bus clock pair BCLK[1:0] determines the front side bus frequency. All processor front side bus agents must receive these signals to drive their outputs and latch their inputs. Notes 3 All external timing parameters are specified with respect to the rising edge of BCLK0 crossing VCROSS. BINIT# I/O BINIT# (Bus Initialization) may be observed and driven by all processor front side 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. 3 If BINIT# observation is enabled during power-on configuration (see Figure 7.1) and BINIT# is sampled asserted, symmetric agents reset their bus LOCK# activity and bus request arbitration state machines. The bus agents do not reset their I/O Queue (IOQ) and transaction tracking state machines upon observation of BINIT# assertion. Once the BINIT# assertion has been observed, the bus agents will re-arbitrate for the front side bus and attempt completion of their bus queue and IOQ entries. 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. Since multiple agents may drive this signal at the same time, BINIT# is a wired-OR signal which must connect the appropriate pins of all processor front side bus agents. In order to avoid wired-OR glitches associated with simultaneous edge transitions driven by multiple drivers, BINIT# is activated on specific clock edges and sampled on specific clock edges BNR# I/O BNR# (Block Next Request) 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. 3 Since multiple agents might need to request a bus stall at the same time, BNR# is a wired-OR signal which must connect the appropriate pins of all processor front side bus agents. In order to avoid wired-OR glitches associated with simultaneous edge transitions driven by multiple drivers, BNR# is activated on specific clock edges and sampled on specific clock edges. BOOT_ SELECT BPM[5:0]# I I/O The BOOT_SELECT input informs the processor whether the platform supports the Dual-Core Intel(R) Xeon(R) processor. The processor will not operate if this signal is low. This input has a weak pull-up to VTT. BPM[5:0]# (Breakpoint Monitor) 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. BPM[5:0]# should connect the appropriate pins of all front side bus agents. 2 BPM4# provides PRDY# (Probe Ready) functionality for the TAP port. PRDY# is a processor output used by debug tools to determine processor debug readiness. BPM5# provides PREQ# (Probe Request) functionality for the TAP port. PREQ# is used by debug tools to request debug operation of the processors. BPM[5:4]# must be bussed to all bus agents. Please refer to the appropriate platform design guidelines for more detailed information. These signals do not have on-die termination and must be terminated at the end agent. See the appropriate platform design guideline for additional information. 44 Dual-Core Intel(R) Xeon(R) Processor 2.80 GHz Datasheet Signal Definitions Table 4-1. Signal Definitions (Sheet 3 of 10) Name Type Description Notes BPRI# I BPRI# (Bus Priority Request) is used to arbitrate for ownership of the processor front side bus. It must connect the appropriate pins of all processor front side 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#. 3 BR0# I/O BR[1:0]# (Bus Request) drive the BREQ[1:0]# signals in the system. The BREQ[1:0]# signals are interconnected in a rotating manner to individual processor pins. BR[3:2}# are connected between the two processor sockets and require termination. The tables below give the rotating interconnect between the processor and bus signals for 2-way systems. BR[3:0]# Signals Rotating Interconnect, 2-way system 3 BR[1:3]# I Bus Signal Agent 0 Pins Agent 1 Pins BREQ0# BR0# BR1# BREQ1# BR1# BR0# BR2# BR3# BR3# BR2# During power-on configuration, the central agent must assert the BREQ0# bus signal. All symmetric agents sample their BR[3:0]# pins on the activeto-inactive transition of RESET#. The pin which the agent samples asserted determines its agent ID. These signals do not have on-die termination and must be terminated. BSEL[1:0] O The BCLK[1:0] frequency select signals BSEL[1:0] are used to select the processor input clock frequency. Table 2-1 defines the possible combinations of the signals and the frequency associated with each combination. The required frequency is determined by the processors, chipset, and clock synthesizer. All front side bus agents must operate at the same frequency. The Dual-Core Intel Xeon processor currently operates at a 800 MHz front side bus frequency (200 MHz BCLK[1:0] frequency). For more information about these pins, including termination recommendations, refer to the appropriate platform design guideline. COMP[0] I COMP[0] must be terminated to VSS on the baseboard using precision resistors. These inputs configure the GTL+ drivers of the processor. Refer to the appropriate platform design guidelines for implementation details. Dual-Core Intel(R) Xeon(R) Processor 2.80 GHz Datasheet 45 Signal Definitions Table 4-1. Signal Definitions (Sheet 4 of 10) Name D[63:0]# Type I/O Description D[63:0]# (Data) are the data signals. These signals provide a 64-bit data path between the processor front side bus agents, and must connect the appropriate pins on all such agents. The data driver asserts DRDY# to indicate a valid data transfer. Notes 3 D[63:0]# are quad-pumped signals, and will thus be driven four times in a common clock period. D[63:0]# are latched off the falling edge of both DSTBP[3:0]# and DSTBN[3:0]#. Each group of 16 data signals correspond to a pair of one DSTBP# and one DSTBN#. The following table shows the grouping of data signals to strobes and DBI#. Data Group DSTBN#/ DSTBP# DBI# D[15:0]# 0 0 D[31:16]# 1 1 D[47:32]# 2 2 D[63:48]# 3 3 Furthermore, the DBI# pins determine the polarity of the data signals. Each group of 16 data signals corresponds to one DBI# signal. When the DBI# signal is active, the corresponding data group is inverted and therefore sampled active high. DBI[3:0]# I/O DBI[3:0]# are source synchronous and indicate the polarity of the D[63:0]# signals. The DBI[3:0]# signals are activated when the data on the data bus is inverted. If more than half the data bits, within a 16-bit group, would have been asserted electronically low, the bus agent may invert the data bus signals for that particular sub-phase for that 16-bit group. DBI[3:0] Assignment To Data Bus Bus Signal DBSY# 46 I/O 3 Data Bus Signals DBI0# D[15:0]# DBI1# D[31:16]# DBI2# D[47:32]# DBI3# D[63:48]# DBSY# (Data Bus Busy) is asserted by the agent responsible for driving data on the processor front side 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 front side bus agents. 3 DEFER# I DEFER# 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 front side bus agents. 3 DP[3:0]# I/O DP[3:0]# (Data Parity) provide parity protection for the D[63:0]# signals. They are driven by the agent responsible for driving D[63:0]#, and must connect the appropriate pins of all processor front side bus agents. 3 DRDY# I/O DRDY# (Data Ready) is asserted by the data driver on each data transfer, indicating valid data on the data bus. In a multi-common clock data transfer, DRDY# may be deasserted to insert idle clocks. This signal must connect the appropriate pins of all processor front side bus agents. 3 Dual-Core Intel(R) Xeon(R) Processor 2.80 GHz Datasheet Signal Definitions Table 4-1. Signal Definitions (Sheet 5 of 10) Name Type DSTBN[3:0]# I/O DSTBP[3:0]# FERR#/PBE# I/O O Description Data strobe used to latch in D[63:0]#. Signals Associated Strobes D[15:0]#, DBI0# DSTBN0# D[31:16]#, DBI1# DSTBN1# D[47:32]#, DBI2# DSTBN2# D[63:48]#, DBI3# DSTBN3# Data strobe used to latch in D[63:0]#. Signals Associated Strobes D[15:0]#, DBI0# DSTBP0# D[31:16]#, DBI1# DSTBP1# D[47:32]#, DBI2# DSTBP2# D[63:48]#, DBI3# DSTBP3# FERR#/PBE# (floating-point error/pending break event) is a multiplexed signal and its meaning is qualified by STPCLK#. When STPCLK# is not asserted, FERR#/PBE# indicates a floating-point error and will be asserted when the processor detects an unmasked floating-point error. When STPCLK# is not asserted, FERR#/PBE# 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. When STPCLK# is asserted, an assertion of FERR#/PBE# indicates that the processor has a pending break event waiting for service. The assertion of FERR#/PBE# indicates that the processor should be returned to the Normal state. For additional information on the pending break event functionality, including the identification of support of the feature and enable/disable information, refer to Vol. 3 of the IA-32 Intel(R) Architecture Software Developer's Manual and the AP-485 Intel(R) Processor Identification and the CPUID Instruction application note. Notes 3 3 3 This signal does not have on-die termination and must be terminated at the end agent. See the appropriate platform design guideline for additional information. FORCEPR# I The FORCEPR# input can be used by the platform to force the Dual-Core Intel Xeon processor to activate the Thermal Control Circuit (TCC). The TCC will remain active until the system deasserts FORCEPR#. GTLREF I GTLREF determines the signal reference level for GTL+ input pins. GTLREF is used by the GTL+ receivers to determine if a signal is a logical 0 or a logical 1. HIT# I/O HITM# I/O HIT# (Snoop Hit) and HITM# (Hit Modified) convey transaction snoop operation results. Any front side bus 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. 3 Since multiple agents may deliver snoop results at the same time, HIT# and HITM# are wired-OR signals which must connect the appropriate pins of all processor front side bus agents. In order to avoid wired-OR glitches associated with simultaneous edge transitions driven by multiple drivers, HIT# and HITM# are activated on specific clock edges and sampled on specific clock edges. Dual-Core Intel(R) Xeon(R) Processor 2.80 GHz Datasheet 47 Signal Definitions Table 4-1. Signal Definitions (Sheet 6 of 10) Name IERR# Type Description Notes O IERR# (Internal Error) 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 front side 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#. 2 This signal does not have on-die termination and must be terminated at the end agent. See the appropriate platform design guideline for additional information. IGNNE# I IGNNE# (Ignore Numeric Error) 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 floatingpoint instruction caused an error. IGNNE# has no effect when the NE bit in control register 0 (CR0) is set. 2 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 INIT# (Initialization), when asserted, resets integer registers inside all processors without affecting their internal 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 front side bus agents. 2 If INIT# is sampled active on the active to inactive transition of RESET#, then the processor executes its Built-in Self-Test (BIST). LINT[1:0] I LINT[1:0] (Local APIC Interrupt) must connect the appropriate pins of all front side bus agents. When the APIC functionality is disabled, the LINT0/ INTR signal becomes INTR, a maskable interrupt request signal, and LINT1/NMI becomes NMI, a nonmaskable interrupt. INTR and NMI are backward compatible with the signals of those names on the Pentium(R) processor. Both signals are asynchronous. 2 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. LOCK# I/O LOCK# indicates to the system that a transaction must occur atomically. This signal must connect the appropriate pins of all processor front side bus agents. For a locked sequence of transactions, LOCK# is asserted from the beginning of the first transaction to the end of the last transaction. 3 When the priority agent asserts BPRI# to arbitrate for ownership of the processor front side bus, it will wait until it observes LOCK# deasserted. This enables symmetric agents to retain ownership of the processor front side bus throughout the bus locked operation and ensure the atomicity of lock. 48 Dual-Core Intel(R) Xeon(R) Processor 2.80 GHz Datasheet Signal Definitions Table 4-1. Signal Definitions (Sheet 7 of 10) Name MCERR# Type Description I/O MCERR# (Machine Check Error) is asserted to indicate an unrecoverable error without a bus protocol violation. It may be driven by all processor front side bus agents. Notes MCERR# assertion conditions are configurable at a system level. Assertion options are defined by the following options: * Enabled or disabled. * Asserted, if configured, for internal errors along with IERR#. * Asserted, if configured, 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. For more details regarding machine check architecture, refer to the IA-32 Intel(R) Architecture Software Developer's Manual, Volume 3: System Programming Guide. Since multiple agents may drive this signal at the same time, MCERR# is a wired-OR signal which must connect the appropriate pins of all processor front side bus agents. In order to avoid wired-OR glitches associated with simultaneous edge transitions driven by multiple drivers, MCERR# is activated on specific clock edges and sampled on specific clock edges. ODTEN I ODTEN (On-die termination enable) should be connected to VTT to enable on-die termination for end bus agents. For middle bus agents, pull this signal down via a resistor to ground to disable on-die termination. Whenever ODTEN is high, on-die termination will be active, regardless of other states of the bus. OPTIMIZED/ COMPAT# I This is an input pin to the processor to determine if the processor is in an optimized platform or a compatible platform. This signal does includes a weak on-die pull-up to VTT. PROCHOT# O PROCHOT# (Processor Hot) will go active when the processor temperature monitoring sensor detects that the processor die temperature has reached its factory configured trip point. This indicates that the processor Thermal Control Circuit (TCC) has been activated, if enabled. See Section 6.2.3 for more details. PWRGOOD I PWRGOOD (Power Good) is an input. The processor requires this signal to be a clean indication that all processor clocks and power supplies 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 2-13, and be followed by a 1-10 ms RESET# pulse. 2 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]# I/O REQ[4:0]# (Request Command) must connect the appropriate pins of all processor front side bus agents. They are asserted by the current bus owner to define the currently active transaction type. These signals are source synchronous to ADSTB[1:0]#. Refer to the AP[1:0]# signal description for details on parity checking of these signals. Dual-Core Intel(R) Xeon(R) Processor 2.80 GHz Datasheet 3 49 Signal Definitions Table 4-1. Signal Definitions (Sheet 8 of 10) Name RESET# Type Description Notes I Asserting the RESET# signal resets all processors to known states and invalidates their internal caches without writing back any of their contents. For a power-on Reset, RESET# must stay active for at least 1 ms after VCC and BCLK have reached their proper specifications. On observing active RESET#, all front side bus agents will deassert their outputs within two clocks. RESET# must not be kept asserted for more than 10 ms while PWRGOOD is asserted. 3 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 Section 7.1. This signal does not have on-die termination and must be terminated at the end agent. See the appropriate platform design guideline for additional information. RS[2:0]# I RS[2:0]# (Response Status) are driven by the response agent (the agent responsible for completion of the current transaction), and must connect the appropriate pins of all processor front side bus agents. 3 RSP# I RSP# (Response Parity) 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 to the appropriate pins of all processor front side bus agents. 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. While RS[2:0]# = 000, RSP# is also high, since this indicates it is not being driven by any agent guaranteeing correct parity. SKTOCC# O SKTOCC# (Socket occupied) will be pulled to ground by the processor to indicate that the processor is present. There is no connection to the processor silicon for this signal. SLP# I SLP# (Sleep), 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-Lock Loop (PLL) still operating. Processors in this state will not recognize snoops or interrupts. The processor will only recognize the assertion of the RESET# signal, deassertion of SLP#, and removal of the BCLK input 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 processor core units. SMB_PRT O The SMBus present (SMB_PRT) pin is defined to inform the platform if the installed processor includes SMBus components such as the integrated thermal sensor and the processor information ROM (PIROM). This pin is tied to VSS by the processor if these features are not present. Platforms utilizing this pin should use a pull up resistor to the appropriate voltage level for the logic tied to this pin. Because this pin does not connect to the processor silicon, any platform voltage and termination value is acceptable. SMI# I SMI# (System Management Interrupt) 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. 2 2 If SMI# is asserted during the deassertion of RESET# the processor will tristate its outputs. STPCLK# 50 I STPCLK# (Stop Clock), 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 front side bus and APIC units. The processor continues to snoop bus transactions and service interrupts while in Stop-Grant state. When STPCLK# is deasserted, the processor restarts its internal clock to all units and resumes execution. The assertion of STPCLK# has no effect on the bus clock; STPCLK# is an asynchronous input. 2 Dual-Core Intel(R) Xeon(R) Processor 2.80 GHz Datasheet Signal Definitions Table 4-1. Signal Definitions (Sheet 9 of 10) Name Type Description TCK I TCK (Test Clock) provides the clock input for the processor Test Bus (also known as the Test Access Port). TDI I TDI (Test Data In) transfers serial test data into the processor. TDI provides the serial input needed for JTAG specification support. TDO O TDO (Test Data Out) transfers serial test data out of the processor. TDO provides the serial output needed for JTAG specification support. TEST_BUS I Must be connected to all other processor TEST_BUS signals in the system. See the appropriate platform design guide for termination details. TESTHI[6:0] I All TESTHI inputs should be individually connected to VTT via a pull-up resistor which matches the trace impedance. TESTHI[3:0] and TESTHI[6:5] may all be tied together and pulled up to VTT with a single resistor if desired. However, utilization of boundary scan test will not be functional if these pins are connected together. TESTHI4 must always be pulled up independently from the other TESTHI pins. For optimum noise margin, all pull-up resistor values used for TESTHI[6:0] should have a resistance value within 20% of the impedance of the baseboard transmission line traces. For example, if the trace impedance is 50 , than a value between 40 and 60 should be used. THERMDA Other Thermal Diode Anode. See Section 6.2.7. THERMDC Other Thermal Diode Cathode. See Section 6.2.7. THERMTRIP# O Assertion of THERMTRIP# (Thermal Trip) indicates the processor junction temperature has reached a temperature beyond which permanent silicon damage may occur. Measurement of the temperature is accomplished through an internal thermal sensor. Upon assertion of THERMTRIP#, the processor will shut off its internal clocks (thus halting program execution) in an attempt to reduce the processor junction temperature. To protect the processor its core voltage (VCC) must be removed following the assertion of THERMTRIP#. Notes 1 Driving of the THERMTRIP# signals is enabled within 10 ms of the assertion of PWRGOOD and is disabled on de-assertion of PWRGOOD. Once activated, THERMTRIP# remains latched until PWRGOOD is deasserted. While the de-assertion of the PWRGOOD signal will de-assert THERMTRIP#, if the processor's junction temperature remains at or above the trip level, THERMTRIP# will again be asserted within 10 ms of the assertion of PWRGOOD. TMS I TMS (Test Mode Select) is a JTAG specification support signal used by debug tools. This signal does not have on-die termination and must be terminated at the end agent. TRDY# I TRDY# (Target Ready) 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 front side bus agents. TRST# I TRST# (Test Reset) resets the Test Access Port (TAP) logic. TRST# must be driven low during power on Reset. VCCA I VCCA provides isolated power for the analog portion of the internal processor core PLL's. Refer to the appropriate platform design guidelines for complete implementation details. VCCIOPLL I VCCIOPLL provides isolated power for digital portion of the internal processor core PLL's. Refer to the appropriate platform design guidelines for complete implementation details. VCCPLL I The on-die PLL filter solution will not be implemented on this platform. The VCCPLL input should be left unconnected. Dual-Core Intel(R) Xeon(R) Processor 2.80 GHz Datasheet 51 Signal Definitions Table 4-1. Signal Definitions (Sheet 10 of 10) Name Type Description O VCCSENSE and VSSSENSE provide an isolated, low impedance connection to the processor core power and ground. They can be used to sense or measure power near the silicon with little noise. VID[5:0] O VID[5:0] (Voltage ID) pins are used to support automatic selection of power supply voltages (VCC). These are open drain signals that are driven by the processor and must be pulled up through a resistor. Conversely, the VR output must be disabled prior to the voltage supply for these pins becomes invalid. The VID pins are needed to support processor voltage specification variations. See Table 2-2 for definitions of these pins. The VR must supply the voltage that is requested by these pins, or disable itself. VIDPWRGD I The processor requires this input to determine that the supply voltage for BSEL[1:0] and VID[5:0] is stable and within specification. VSSA I VSSA provides an isolated, internal ground for internal PLL's. Do not connect directly to ground. This pin is to be connected to VCCA and VCCIOPLL through a discrete filter circuit. VTT P The front side bus termination voltage input pins. Refer to Table 2-7 for further details. VTTEN O The VTTEN can be used as an output enable for the VTT regulator in the event an incompatible processor is inserted into the platform. There is no connection to the processor silicon for this signal and it must be pulled up through a resistor. Refer to the appropriate platform design guidelines for implementation details. VCCSENSE VSSSENSE Notes NOTES: 1. For this pin on Dual-Core Intel Xeon processor, the maximum number of symmetric agents is one. Maximum number of central agents is zero. 2. For this pin on Dual-Core Intel Xeon processor, the maximum number of symmetric agents is two. Maximum number of central agents is zero. 3. For this pin on Dual-Core Intel Xeon processor, the maximum number of symmetric agents is two. Maximum number of central agents is one. 52 Dual-Core Intel(R) Xeon(R) Processor 2.80 GHz Datasheet 5 Pin Listing 5.1 Dual-Core Intel(R) Xeon(R) Processor Pin Assignments This section provides sorted pin lists in Table 5-1 and Table 5-2. Table 5-1 is a listing of all processor pins ordered alphabetically by pin name. Table 5-2 is a listing of all processor pins ordered by pin number. 5.1.1 Pin Listing by Pin Name Table 5-1. Pin Listing by Pin Name (Cont'd) Table 5-1. Pin Listing by Pin Name Pin Name Pin No. Signal Buffer Type Direction Pin Name Pin No. Signal Buffer Type Direction A3# A22 Source Sync Input/Output A30# C11 Source Sync Input/Output A4# A20 Source Sync Input/Output A31# B7 Source Sync Input/Output A5# B18 Source Sync Input/Output A32# A6 Source Sync Input/Output A7 Source Sync Input/Output A6# C18 Source Sync Input/Output A33# A7# A19 Source Sync Input/Output A34# C9 Source Sync Input/Output A8# C17 Source Sync Input/Output A35# C8 Source Sync Input/Output A9# D17 Source Sync Input/Output A20M# F27 Async GTL+ Input D19 Common Clk Input/Output A10# A13 Source Sync Input/Output ADS# A11# B16 Source Sync Input/Output ADSTB0# F17 Source Sync Input/Output A12# B14 Source Sync Input/Output ADSTB1# F14 Source Sync Input/Output Input/Output AP0# E10 Common Clk Input/Output D9 Common Clk Input/Output A13# B13 Source Sync A14# A12 Source Sync Input/Output AP1# A15# C15 Source Sync Input/Output BCLK0 Y4 Sys Bus Clk Input A16# C14 Source Sync Input/Output BCLK1 W5 Sys Bus Clk Input Input/Output BINIT# F11 Common Clk Input/Output F20 Common Clk Input/Output A17# D16 Source Sync A18# D15 Source Sync Input/Output BNR# A19# F15 Source Sync Input/Output BOOT_SELECT G7 Power/Other Input A20# A10 Source Sync Input/Output BPM0# F6 Common Clk Input/Output Input/Output BPM1# F8 Common Clk Input/Output E7 Common Clk Input/Output A21# B10 Source Sync A22# B11 Source Sync Input/Output BPM2# A23# C12 Source Sync Input/Output BPM3# F5 Common Clk Input/Output A24# E14 Source Sync Input/Output BPM4# E8 Common Clk Input/Output Input/Output BPM5# E4 Common Clk Input/Output D23 Common Clk Input A25# D13 Source Sync A26# A9 Source Sync Input/Output BPRI# A27# B8 Source Sync Input/Output BR0# D20 Common Clk Input/Output A28# E13 Source Sync Input/Output BR1# F12 Common Clk Input Input/Output BR2# E11 Common Clk Input A29# D12 Source Sync Dual-Core Intel(R) Xeon(R) Processor 2.80 GHz Datasheet 53 Pin Listing Table 5-1. Pin Listing by Pin Name (Cont'd) 54 Table 5-1. Pin Listing by Pin Name (Cont'd) Pin Name Pin No. Signal Buffer Type Direction Pin Name Pin No. Signal Buffer Type Direction BR3# D10 Common Clk Input D34# AC17 Source Sync Input/Output BSEL0 AA3 Power/Other Output D35# AE13 Source Sync Input/Output BSEL1 AB3 Power/Other Output D36# AD18 Source Sync Input/Output COMP0 AD16 Power/Other Input D37# AB15 Source Sync Input/Output D0# Y26 Source Sync Input/Output D38# AD13 Source Sync Input/Output D1# AA27 Source Sync Input/Output D39# AD14 Source Sync Input/Output D2# Y24 Source Sync Input/Output D40# AD11 Source Sync Input/Output D3# AA25 Source Sync Input/Output D41# AC12 Source Sync Input/Output D4# AD27 Source Sync Input/Output D42# AE10 Source Sync Input/Output D5# Y23 Source Sync Input/Output D43# AC11 Source Sync Input/Output D6# AA24 Source Sync Input/Output D44# AE9 Source Sync Input/Output D7# AB26 Source Sync Input/Output D45# AD10 Source Sync Input/Output D8# AB25 Source Sync Input/Output D46# AD8 Source Sync Input/Output D9# AB23 Source Sync Input/Output D47# AC9 Source Sync Input/Output D10# AA22 Source Sync Input/Output D48# AA13 Source Sync Input/Output D11# AA21 Source Sync Input/Output D49# AA14 Source Sync Input/Output D12# AB20 Source Sync Input/Output D50# AC14 Source Sync Input/Output D13# AB22 Source Sync Input/Output D51# AB12 Source Sync Input/Output D14# AB19 Source Sync Input/Output D52# AB13 Source Sync Input/Output D15# AA19 Source Sync Input/Output D53# AA11 Source Sync Input/Output D16# AE26 Source Sync Input/Output D54# AA10 Source Sync Input/Output D17# AC26 Source Sync Input/Output D55# AB10 Source Sync Input/Output D18# AD25 Source Sync Input/Output D56# AC8 Source Sync Input/Output D19# AE25 Source Sync Input/Output D57# AD7 Source Sync Input/Output D20# AC24 Source Sync Input/Output D58# AE7 Source Sync Input/Output D21# AD24 Source Sync Input/Output D59# AC6 Source Sync Input/Output D22# AE23 Source Sync Input/Output D60# AC5 Source Sync Input/Output D23# AC23 Source Sync Input/Output D61# AA8 Source Sync Input/Output D24# AA18 Source Sync Input/Output D62# Y9 Source Sync Input/Output D25# AC20 Source Sync Input/Output D63# AB6 Source Sync Input/Output D26# AC21 Source Sync Input/Output DBSY# F18 Common Clk Input/Output D27# AE22 Source Sync Input/Output DEFER# C23 Common Clk Input D28# AE20 Source Sync Input/Output DBI0# AC27 Source Sync Input/Output D29# AD21 Source Sync Input/Output DBI1# AD22 Source Sync Input/Output D30# AD19 Source Sync Input/Output DBI2# AE12 Source Sync Input/Output D31# AB17 Source Sync Input/Output DBI3# AB9 Source Sync Input/Output D32# AB16 Source Sync Input/Output DP0# AC18 Common Clk Input/Output D33# AA16 Source Sync Input/Output DP1# AE19 Common Clk Input/Output Dual-Core Intel(R) Xeon(R) Processor 2.80 GHz Datasheet Pin Listing Table 5-1. Pin Listing by Pin Name (Cont'd) Table 5-1. Pin Listing by Pin Name (Cont'd) Pin Name Pin No. Signal Buffer Type Direction Pin Name Pin No. Signal Buffer Type Direction DP2# AC15 Common Clk Input/Output C1 Power/Other Input Input/Output OPTIMIZED/ COMPAT# PROCHOT# B25 Async GTL+ Output PWRGOOD AB7 Async GTL+ Input REQ0# B19 Source Sync Input/Output REQ1# B21 Source Sync Input/Output REQ2# C21 Source Sync Input/Output REQ3# C20 Source Sync Input/Output REQ4# B22 Source Sync Input/Output Reserved A26 Reserved Reserved Reserved D25 Reserved Reserved Reserved W3 Reserved Reserved Reserved Y3 Reserved Reserved Reserved AC1 Reserved Reserved Reserved AE15 Reserved Reserved Reserved AE16 Reserved Reserved Reserved AE28 Reserved Reserved Reserved AE29 Reserved Reserved RESET# Y8 Common Clk Input RS0# E21 Common Clk Input RS1# D22 Common Clk Input RS2# F21 Common Clk Input RSP# C6 Common Clk Input SKTOCC# A3 Power/Other Output SLP# AE6 Async GTL+ Input SMB_PRT AE4 Power/Other Output SMI# C27 Async GTL+ Input STPCLK# D4 Async GTL+ Input TCK E24 TAP Input TDI C24 TAP Input TDO E25 TAP Output TEST_BUS A16 Power/Other Input TESTHI0 W6 Power/Other Input TESTHI1 W7 Power/Other Input TESTHI2 W8 Power/Other Input DP3# AE17 Common Clk DRDY# E18 Common Clk Input/Output DSTBN0# Y21 Source Sync Input/Output DSTBN1# Y18 Source Sync Input/Output DSTBN2# Y15 Source Sync Input/Output DSTBN3# Y12 Source Sync Input/Output DSTBP0# Y20 Source Sync Input/Output DSTBP1# Y17 Source Sync Input/Output DSTBP2# Y14 Source Sync Input/Output DSTBP3# Y11 Source Sync Input/Output FERR#/PBE# E27 Async GTL+ Output FORCEPR# A15 Async GTL+ Input GTLREF W23 Power/Other Input GTLREF W9 Power/Other Input GTLREF F23 Power/Other Input GTLREF F9 Power/Other Input HIT# E22 Common Clk Input/Output HITM# A23 Common Clk Input/Output IERR# E5 Async GTL+ Output IGNNE# C26 Async GTL+ Input INIT# D6 Async GTL+ Input LINT0/INTR B24 Async GTL+ Input LINT1/NMI G23 Async GTL+ Input LOCK# A17 Common Clk Input/Output MCERR# D7 Common Clk Input/Output N/C Y29 N/C N/C N/C AA28 N/C N/C N/C AA29 N/C N/C N/C AB28 N/C N/C N/C AB29 N/C N/C N/C AC28 N/C N/C N/C AC29 N/C N/C N/C AD28 N/C N/C N/C AD29 N/C N/C N/C AE30 N/C N/C ODTEN B5 Power/Other Input Dual-Core Intel(R) Xeon(R) Processor 2.80 GHz Datasheet TESTHI3 Y6 Power/Other Input TESTHI4 AA7 Power/Other Input TESTHI5 AD5 Power/Other Input 55 Pin Listing Table 5-1. Pin Listing by Pin Name (Cont'd) Table 5-1. Pin Listing by Pin Name (Cont'd) Pin Name Pin No. Signal Buffer Type Direction Pin Name Pin No. Signal Buffer Type TESTHI6 AE5 Power/Other Input VCC F1 Power/Other THERMDA Y27 Power/Other Output VCC F4 Power/Other THERMDC Y28 Power/Other Output VCC F16 Power/Other THERMTRIP# F26 Async GTL+ Output VCC F22 Power/Other TMS A25 TAP Input VCC F29 Power/Other TRDY# E19 Common Clk Input VCC F31 Power/Other TRST# F24 TAP Input VCC G2 Power/Other VCC A2 Power/Other VCC G4 Power/Other VCC A8 Power/Other VCC G6 Power/Other VCC A14 Power/Other VCC G8 Power/Other VCC A18 Power/Other VCC G24 Power/Other VCC A24 Power/Other VCC G26 Power/Other VCC A28 Power/Other VCC G28 Power/Other VCC A30 Power/Other VCC G30 Power/Other VCC B6 Power/Other VCC H1 Power/Other VCC B20 Power/Other VCC H3 Power/Other VCC B26 Power/Other VCC H5 Power/Other VCC B29 Power/Other VCC H7 Power/Other VCC B31 Power/Other VCC H9 Power/Other VCC C2 Power/Other VCC H23 Power/Other VCC C4 Power/Other VCC H25 Power/Other VCC C16 Power/Other VCC H27 Power/Other VCC C22 Power/Other VCC H29 Power/Other VCC C28 Power/Other VCC H31 Power/Other VCC C30 Power/Other VCC J2 Power/Other VCC D1 Power/Other VCC J4 Power/Other VCC D8 Power/Other VCC J6 Power/Other VCC D14 Power/Other VCC J8 Power/Other VCC D18 Power/Other VCC J24 Power/Other VCC D24 Power/Other VCC J26 Power/Other VCC D29 Power/Other VCC J28 Power/Other VCC D31 Power/Other VCC J30 Power/Other VCC E2 Power/Other VCC K1 Power/Other 56 VCC E6 Power/Other VCC K3 Power/Other VCC E20 Power/Other VCC K5 Power/Other VCC E26 Power/Other VCC K7 Power/Other VCC E28 Power/Other VCC K9 Power/Other VCC E30 Power/Other VCC K23 Power/Other Direction Dual-Core Intel(R) Xeon(R) Processor 2.80 GHz Datasheet Pin Listing Table 5-1. Pin Listing by Pin Name (Cont'd) Pin Name Pin No. Signal Buffer Type VCC K25 VCC VCC Table 5-1. Pin Listing by Pin Name (Cont'd) Pin Name Pin No. Signal Buffer Type Power/Other VCC P28 Power/Other K27 Power/Other VCC P30 Power/Other K29 Power/Other VCC R1 Power/Other VCC K31 Power/Other VCC R3 Power/Other VCC L2 Power/Other VCC R5 Power/Other VCC L4 Power/Other VCC R7 Power/Other VCC L6 Power/Other VCC R9 Power/Other VCC L8 Power/Other VCC R23 Power/Other VCC L24 Power/Other VCC R25 Power/Other VCC L26 Power/Other VCC R27 Power/Other VCC L28 Power/Other VCC R29 Power/Other VCC L30 Power/Other VCC R31 Power/Other VCC M1 Power/Other VCC T2 Power/Other VCC M3 Power/Other VCC T4 Power/Other VCC M5 Power/Other VCC T6 Power/Other VCC M7 Power/Other VCC T8 Power/Other VCC M9 Power/Other VCC T24 Power/Other VCC M23 Power/Other VCC T26 Power/Other VCC M25 Power/Other VCC T28 Power/Other VCC M27 Power/Other VCC T30 Power/Other VCC M29 Power/Other VCC U1 Power/Other VCC M31 Power/Other VCC U3 Power/Other VCC N1 Power/Other VCC U5 Power/Other VCC N3 Power/Other VCC U7 Power/Other VCC N5 Power/Other VCC U9 Power/Other VCC N7 Power/Other VCC U23 Power/Other VCC N9 Power/Other VCC U25 Power/Other VCC N23 Power/Other VCC U27 Power/Other VCC N25 Power/Other VCC U29 Power/Other VCC N27 Power/Other VCC U31 Power/Other VCC N29 Power/Other VCC V2 Power/Other VCC N31 Power/Other VCC V4 Power/Other VCC P2 Power/Other VCC V6 Power/Other VCC P4 Power/Other VCC V8 Power/Other VCC P6 Power/Other VCC V24 Power/Other VCC P8 Power/Other VCC V26 Power/Other VCC P24 Power/Other VCC V28 Power/Other VCC P26 Power/Other VCC V30 Power/Other Direction Dual-Core Intel(R) Xeon(R) Processor 2.80 GHz Datasheet Direction 57 Pin Listing Table 5-1. Pin Listing by Pin Name (Cont'd) 58 Pin Name Pin No. Signal Buffer Type VCC W1 VCC VCC Table 5-1. Pin Listing by Pin Name (Cont'd) Pin Name Pin No. Signal Buffer Type Direction Power/Other VCCPLL AD1 Power/Other Input W25 Power/Other VCCSENSE B27 Power/Other Output W27 Power/Other VID0 F3 Power/Other Output VCC W29 Power/Other VID1 E3 Power/Other Output VCC W31 Power/Other VID2 D3 Power/Other Output Direction VCC Y2 Power/Other VID3 C3 Power/Other Output VCC Y16 Power/Other VID4 B3 Power/Other Output VCC Y22 Power/Other VID5 A1 Power/Other Output VCC Y30 Power/Other VIDPWRGD B1 Power/Other Input VCC AA1 Power/Other VSS A5 Power/Other VCC AA4 Power/Other VSS A11 Power/Other VCC AA6 Power/Other VSS A21 Power/Other VCC AA20 Power/Other VSS A27 Power/Other VCC AA26 Power/Other VSS A29 Power/Other VCC AA31 Power/Other VSS A31 Power/Other VCC AB2 Power/Other VSS B2 Power/Other VCC AB8 Power/Other VSS B9 Power/Other VCC AB14 Power/Other VSS B15 Power/Other VCC AB18 Power/Other VSS B17 Power/Other VCC AB24 Power/Other VSS B23 Power/Other VCC AB30 Power/Other VSS B28 Power/Other VCC AC3 Power/Other VSS B30 Power/Other VCC AC4 Power/Other VSS C7 Power/Other VCC AC16 Power/Other VSS C13 Power/Other VCC AC22 Power/Other VSS C19 Power/Other VCC AC31 Power/Other VSS C25 Power/Other VCC AD2 Power/Other VSS C29 Power/Other VCC AD6 Power/Other VSS C31 Power/Other VCC AD20 Power/Other VSS D2 Power/Other VCC AD26 Power/Other VSS D5 Power/Other VCC AD30 Power/Other VSS D11 Power/Other VCC AE3 Power/Other VSS D21 Power/Other VCC AE8 Power/Other VSS D27 Power/Other VCC AE14 Power/Other VSS D28 Power/Other VCC AE18 Power/Other VSS D30 Power/Other VCC AE24 Power/Other VSS E9 Power/Other VCCA AB4 Power/Other Input VSS E15 Power/Other VCCIOPLL AD4 Power/Other Input VSS E17 Power/Other Dual-Core Intel(R) Xeon(R) Processor 2.80 GHz Datasheet Pin Listing Table 5-1. Pin Listing by Pin Name (Cont'd) Pin Name Pin No. Signal Buffer Type VSS E23 VSS VSS Table 5-1. Pin Listing by Pin Name (Cont'd) Pin Name Pin No. Signal Buffer Type Power/Other VSS K6 Power/Other E29 Power/Other VSS K8 Power/Other E31 Power/Other VSS K24 Power/Other VSS F2 Power/Other VSS K26 Power/Other VSS F7 Power/Other VSS K28 Power/Other VSS F13 Power/Other VSS K30 Power/Other VSS F19 Power/Other VSS L1 Power/Other VSS F25 Power/Other VSS L3 Power/Other VSS F28 Power/Other VSS L5 Power/Other VSS F30 Power/Other VSS L7 Power/Other VSS G1 Power/Other VSS L9 Power/Other VSS G3 Power/Other VSS L23 Power/Other VSS G5 Power/Other VSS L25 Power/Other VSS G9 Power/Other VSS L27 Power/Other VSS G25 Power/Other VSS L29 Power/Other VSS G27 Power/Other VSS L31 Power/Other VSS G29 Power/Other VSS M2 Power/Other VSS G31 Power/Other VSS M4 Power/Other VSS H2 Power/Other VSS M6 Power/Other VSS H4 Power/Other VSS M8 Power/Other VSS H6 Power/Other VSS M24 Power/Other VSS H8 Power/Other VSS M26 Power/Other VSS H24 Power/Other VSS M28 Power/Other VSS H26 Power/Other VSS M30 Power/Other VSS H28 Power/Other VSS N2 Power/Other VSS H30 Power/Other VSS N4 Power/Other VSS J1 Power/Other VSS N6 Power/Other VSS J3 Power/Other VSS N8 Power/Other VSS J5 Power/Other VSS N24 Power/Other VSS J7 Power/Other VSS N26 Power/Other VSS J9 Power/Other VSS N28 Power/Other VSS J23 Power/Other VSS N30 Power/Other VSS J25 Power/Other VSS P1 Power/Other VSS J27 Power/Other VSS P3 Power/Other VSS J29 Power/Other VSS P5 Power/Other VSS J31 Power/Other VSS P7 Power/Other VSS K2 Power/Other VSS P9 Power/Other VSS K4 Power/Other VSS P23 Power/Other Direction Dual-Core Intel(R) Xeon(R) Processor 2.80 GHz Datasheet Direction 59 Pin Listing Table 5-1. Pin Listing by Pin Name (Cont'd) 60 Pin Name Pin No. Signal Buffer Type VSS P25 VSS VSS Table 5-1. Pin Listing by Pin Name (Cont'd) Pin Name Pin No. Signal Buffer Type Power/Other VSS V29 Power/Other P27 Power/Other VSS V31 Power/Other P29 Power/Other VSS W2 Power/Other VSS P31 Power/Other VSS W4 Power/Other VSS R2 Power/Other VSS W24 Power/Other VSS R4 Power/Other VSS W26 Power/Other VSS R6 Power/Other VSS W28 Power/Other VSS R8 Power/Other VSS W30 Power/Other VSS R24 Power/Other VSS Y1 Power/Other VSS R26 Power/Other VSS Y5 Power/Other VSS R28 Power/Other VSS Y7 Power/Other VSS R30 Power/Other VSS Y13 Power/Other VSS T1 Power/Other VSS Y19 Power/Other VSS T3 Power/Other VSS Y25 Power/Other VSS T5 Power/Other VSS Y31 Power/Other VSS T7 Power/Other VSS AA2 Power/Other VSS T9 Power/Other VSS AA9 Power/Other VSS T23 Power/Other VSS AA15 Power/Other VSS T25 Power/Other VSS AA17 Power/Other VSS T27 Power/Other VSS AA23 Power/Other VSS T29 Power/Other VSS AA30 Power/Other VSS T31 Power/Other VSS AB1 Power/Other VSS U2 Power/Other VSS AB5 Power/Other VSS U4 Power/Other VSS AB11 Power/Other VSS U6 Power/Other VSS AB21 Power/Other Direction VSS U8 Power/Other VSS AB27 Power/Other VSS U24 Power/Other VSS AB31 Power/Other VSS U26 Power/Other VSS AC2 Power/Other VSS U28 Power/Other VSS AC7 Power/Other VSS U30 Power/Other VSS AC13 Power/Other VSS V1 Power/Other VSS AC19 Power/Other VSS V3 Power/Other VSS AC25 Power/Other VSS V5 Power/Other VSS AD3 Power/Other VSS V7 Power/Other VSS AD9 Power/Other VSS V9 Power/Other VSS AD15 Power/Other VSS V23 Power/Other VSS AD17 Power/Other VSS V25 Power/Other VSS AD23 Power/Other VSS V27 Power/Other VSS AD31 Power/Other Direction Dual-Core Intel(R) Xeon(R) Processor 2.80 GHz Datasheet Pin Listing Table 5-1. Pin Listing by Pin Name (Cont'd) Pin Name Pin No. Signal Buffer Type VSS AE2 VSS VSS VSS Table 5-1. Pin Listing by Pin Name (Cont'd) Pin Name Pin No. Signal Buffer Type Power/Other VTT B12 Power/Other AE11 Power/Other VTT C10 Power/Other AE21 Power/Other VTT E12 Power/Other AE27 Power/Other VTT F10 Power/Other VSSA AA5 Power/Other Input VTT Y10 Power/Other VSSSENSE D26 Power/Other Output VTT AA12 Power/Other VTT A4 Power/Other VTT AC10 Power/Other VTT B4 Power/Other VTT AD12 Power/Other VTT C5 Power/Other VTTEN E1 Power/Other Direction Dual-Core Intel(R) Xeon(R) Processor 2.80 GHz Datasheet Direction Output 61 Pin Listing 5.1.2 Pin Listing by Pin Number Table 5-2. Pin Listing by Pin Number (Cont'd) Table 5-2. Pin Listing by Pin Number Pin No. Pin Name Signal Buffer Type Direction Pin No. Pin Name Signal Buffer Type A1 VID5 Power/Other Output B6 VCC Power/Other A2 VCC Power/Other B7 A31# Source Sync Input/Output A3 SKTOCC# Power/Other B8 A27# Source Sync Input/Output A4 VTT Power/Other B9 VSS Power/Other B10 A21# Source Sync Input/Output Input/Output 62 Output Direction A5 VSS Power/Other A6 A32# Source Sync Input/Output B11 A22# Source Sync A7 A33# Source Sync Input/Output B12 VTT Power/Other A8 VCC Power/Other B13 A13# Source Sync Input/Output A12# Source Sync Input/Output A9 A26# Source Sync Input/Output B14 A10 A20# Source Sync Input/Output B15 VSS Power/Other A11 VSS Power/Other B16 A11# Source Sync A12 A14# Source Sync Input/Output B17 VSS Power/Other Input/Output B18 A5# Source Sync Input/Output B19 REQ0# Source Sync Input/Output Input/Output A13 A10# Source Sync A14 VCC Power/Other A15 FORCEPR# Async GTL+ Input B20 VCC Power/Other A16 TEST_BUS Power/Other Input B21 REQ1# Source Sync Input/Output Input/Output B22 REQ4# Source Sync Input/Output B23 VSS Power/Other A17 LOCK# Common Clk A18 VCC Power/Other A19 A7# Source Sync Input/Output B24 LINT0/INTR Async GTL+ Input A20 A4# Source Sync Input/Output B25 PROCHOT# Power/Other Output B26 VCC Power/Other A21 VSS Power/Other A22 A3# Source Sync Input/Output B27 VCCSENSE Power/Other A23 HITM# Common Clk Input/Output B28 VSS Power/Other A24 VCC Power/Other B29 VCC Power/Other VSS Power/Other A25 TMS TAP Input B30 A26 Reserved Reserved Reserved B31 VCC Power/Other A27 VSS Power/Other C1 OPTIMIZED/ COMPAT# Power/Other A28 VCC Power/Other C2 VCC Power/Other A29 VSS Power/Other C3 VID3 Power/Other A30 VCC Power/Other C4 VCC Power/Other A31 VSS Power/Other C5 VTT Power/Other B1 VIDPWRGD Power/Other C6 RSP# Common Clk B2 VSS Power/Other B3 VID4 Power/Other B4 VTT Power/Other B5 ODTEN Power/Other Input Output Input Output Input Output Input C7 VSS Power/Other C8 A35# Source Sync Input/Output C9 A34# Source Sync Input/Output C10 VTT Power/Other Dual-Core Intel(R) Xeon(R) Processor 2.80 GHz Datasheet Pin Listing Table 5-2. Pin Listing by Pin Number (Cont'd) Table 5-2. Pin Listing by Pin Number (Cont'd) Pin No. Pin Name Signal Buffer Type Direction Pin No. Pin Name Signal Buffer Type C11 A30# Source Sync Input/Output D18 VCC Power/Other C12 A23# Source Sync Input/Output D19 ADS# Common Clk Input/Output C13 VSS Power/Other D20 BR0# Common Clk Input/Output C14 A16# Source Sync Input/Output D21 VSS Power/Other C15 A15# Source Sync Input/Output D22 RS1# Common Clk Input C16 VCC Power/Other D23 BPRI# Common Clk Input C17 A8# Source Sync Input/Output D24 VCC Power/Other C18 A6# Source Sync Input/Output D25 Reserved Reserved Reserved C19 VSS Power/Other D26 VSSSENSE Power/Other Output C20 REQ3# Source Sync Input/Output D27 VSS Power/Other C21 REQ2# Source Sync Input/Output D28 VSS Power/Other C22 VCC Power/Other D29 VCC Power/Other C23 DEFER# Common Clk Input D30 VSS Power/Other Input D31 VCC Power/Other E1 VTTEN Power/Other Direction C24 TDI TAP C25 VSS Power/Other C26 IGNNE# Async GTL+ Input E2 VCC Power/Other C27 SMI# Async GTL+ Input E3 VID1 Power/Other Output C28 VCC Power/Other E4 BPM5# Common Clk Input/Output C29 VSS Power/Other E5 IERR# Async GTL+ Output C30 VCC Power/Other E6 VCC Power/Other C31 VSS Power/Other E7 BPM2# Common Clk Input/Output D1 VCC Power/Other E8 BPM4# Common Clk Input/Output D2 VSS Power/Other E9 VSS Power/Other D3 VID2 Power/Other Output E10 AP0# Common Clk Input/Output D4 STPCLK# Async GTL+ Input E11 BR2# Common Clk Input D5 VSS Power/Other E12 VTT Power/Other D6 INIT# Async GTL+ Input E13 A28# Source Sync Input/Output D7 MCERR# Common Clk Input/Output E14 A24# Source Sync Input/Output D8 VCC Power/Other E15 VSS Power/Other Input/Output E17 VSS Power/Other Input E18 DRDY# Common Clk Input/Output E19 TRDY# Common Clk Input Output D9 AP1# Common Clk D10 BR3# Common Clk D11 VSS Power/Other D12 A29# Source Sync Input/Output E20 VCC Power/Other D13 A25# Source Sync Input/Output E21 RS0# Common Clk Input D14 VCC Power/Other E22 HIT# Common Clk Input/Output D15 A18# Source Sync Input/Output E23 VSS Power/Other D16 A17# Source Sync Input/Output E24 TCK TAP Input D17 A9# Source Sync Input/Output E25 TDO TAP Output Dual-Core Intel(R) Xeon(R) Processor 2.80 GHz Datasheet 63 Pin Listing Table 5-2. Pin Listing by Pin Number (Cont'd) Table 5-2. Pin Listing by Pin Number (Cont'd) Pin No. Pin Name Signal Buffer Type E26 VCC Power/Other E27 FERR#/PBE# Async GTL+ G3 VSS Power/Other E28 VCC Power/Other G4 VCC Power/Other E29 VSS Power/Other G5 VSS Power/Other E30 VCC Power/Other G6 VCC Power/Other 64 Direction Output Pin No. Pin Name Signal Buffer Type G2 VCC Power/Other E31 VSS Power/Other G7 BOOT_SELECT Power/Other F1 VCC Power/Other G8 VCC Power/Other F2 VSS Power/Other G9 VSS Power/Other F3 VID0 Power/Other G23 LINT1/NMI Async GTL+ F4 VCC Power/Other G24 VCC Power/Other F5 BPM3# Common Clk Input/Output G25 VSS Power/Other F6 BPM0# Common Clk Input/Output G26 VCC Power/Other F7 VSS Power/Other G27 VSS Power/Other F8 BPM1# Common Clk Input/Output G28 VCC Power/Other F9 GTLREF Power/Other Input G29 VSS Power/Other F10 VTT Power/Other G30 VCC Power/Other F11 BINIT# Common Clk Input/Output G31 VSS Power/Other Input H1 VCC Power/Other H2 VSS Power/Other Output F12 BR1# Common Clk F13 VSS Power/Other F14 ADSTB1# Source Sync Input/Output H3 VCC Power/Other F15 A19# Source Sync Input/Output H4 VSS Power/Other F16 VCC Power/Other H5 VCC Power/Other F17 ADSTB0# Source Sync Input/Output H6 VSS Power/Other F18 DBSY# Common Clk Input/Output H7 VCC Power/Other F19 VSS Power/Other H8 VSS Power/Other F20 BNR# Common Clk Input/Output H9 VCC Power/Other F21 RS2# Common Clk Input H23 VCC Power/Other F22 VCC Power/Other H24 VSS Power/Other F23 GTLREF Power/Other Input H25 VCC Power/Other F24 TRST# TAP Input H26 VSS Power/Other F25 VSS Power/Other H27 VCC Power/Other F26 THERMTRIP# Async GTL+ Output H28 VSS Power/Other F27 A20M# Async GTL+ Input H29 VCC Power/Other F28 VSS Power/Other H30 VSS Power/Other F29 VCC Power/Other H31 VCC Power/Other F30 VSS Power/Other J1 VSS Power/Other F31 VCC Power/Other J2 VCC Power/Other G1 VSS Power/Other J3 VSS Power/Other Direction Input Input Dual-Core Intel(R) Xeon(R) Processor 2.80 GHz Datasheet Pin Listing Table 5-2. Pin Listing by Pin Number (Cont'd) Pin No. Pin Name Signal Buffer Type J4 VCC Table 5-2. Pin Listing by Pin Number (Cont'd) Pin No. Pin Name Signal Buffer Type Power/Other L6 VCC Power/Other Direction J5 VSS Power/Other L7 VSS Power/Other J6 VCC Power/Other L8 VCC Power/Other J7 VSS Power/Other L9 VSS Power/Other J8 VCC Power/Other L23 VSS Power/Other J9 VSS Power/Other L24 VCC Power/Other J23 VSS Power/Other L25 VSS Power/Other J24 VCC Power/Other L26 VCC Power/Other J25 VSS Power/Other L27 VSS Power/Other J26 VCC Power/Other L28 VCC Power/Other J27 VSS Power/Other L29 VSS Power/Other J28 VCC Power/Other L30 VCC Power/Other J29 VSS Power/Other L31 VSS Power/Other J30 VCC Power/Other M1 VCC Power/Other J31 VSS Power/Other M2 VSS Power/Other K1 VCC Power/Other M3 VCC Power/Other K2 VSS Power/Other M4 VSS Power/Other K3 VCC Power/Other M5 VCC Power/Other K4 VSS Power/Other M6 VSS Power/Other K5 VCC Power/Other M7 VCC Power/Other K6 VSS Power/Other M8 VSS Power/Other K7 VCC Power/Other M9 VCC Power/Other K8 VSS Power/Other M23 VCC Power/Other K9 VCC Power/Other M24 VSS Power/Other K23 VCC Power/Other M25 VCC Power/Other K24 VSS Power/Other M26 VSS Power/Other K25 VCC Power/Other M27 VCC Power/Other K26 VSS Power/Other M28 VSS Power/Other K27 VCC Power/Other M29 VCC Power/Other K28 VSS Power/Other M30 VSS Power/Other K29 VCC Power/Other M31 VCC Power/Other K30 VSS Power/Other N1 VCC Power/Other K31 VCC Power/Other N2 VSS Power/Other L1 VSS Power/Other N3 VCC Power/Other L2 VCC Power/Other N4 VSS Power/Other L3 VSS Power/Other N5 VCC Power/Other L4 VCC Power/Other N6 VSS Power/Other L5 VSS Power/Other N7 VCC Power/Other Dual-Core Intel(R) Xeon(R) Processor 2.80 GHz Datasheet Direction 65 Pin Listing Table 5-2. Pin Listing by Pin Number (Cont'd) Pin No. Pin Name Signal Buffer Type N8 VSS 66 Table 5-2. Pin Listing by Pin Number (Cont'd) Pin No. Pin Name Signal Buffer Type Power/Other R23 VCC Power/Other Direction N9 VCC Power/Other R24 VSS Power/Other N23 VCC Power/Other R25 VCC Power/Other N24 VSS Power/Other R26 VSS Power/Other N25 VCC Power/Other R27 VCC Power/Other N26 VSS Power/Other R28 VSS Power/Other N27 VCC Power/Other R29 VCC Power/Other N28 VSS Power/Other R30 VSS Power/Other N29 VCC Power/Other R31 VCC Power/Other N30 VSS Power/Other T1 VSS Power/Other N31 VCC Power/Other T2 VCC Power/Other P1 VSS Power/Other T3 VSS Power/Other P2 VCC Power/Other T4 VCC Power/Other P3 VSS Power/Other T5 VSS Power/Other P4 VCC Power/Other T6 VCC Power/Other P5 VSS Power/Other T7 VSS Power/Other P6 VCC Power/Other T8 VCC Power/Other P7 VSS Power/Other T9 VSS Power/Other P8 VCC Power/Other T23 VSS Power/Other P9 VSS Power/Other T24 VCC Power/Other P23 VSS Power/Other T25 VSS Power/Other P24 VCC Power/Other T26 VCC Power/Other P25 VSS Power/Other T27 VSS Power/Other P26 VCC Power/Other T28 VCC Power/Other P27 VSS Power/Other T29 VSS Power/Other P28 VCC Power/Other T30 VCC Power/Other P29 VSS Power/Other T31 VSS Power/Other P30 VCC Power/Other U1 VCC Power/Other P31 VSS Power/Other U2 VSS Power/Other R1 VCC Power/Other U3 VCC Power/Other R2 VSS Power/Other U4 VSS Power/Other R3 VCC Power/Other U5 VCC Power/Other R4 VSS Power/Other U6 VSS Power/Other R5 VCC Power/Other U7 VCC Power/Other R6 VSS Power/Other U8 VSS Power/Other R7 VCC Power/Other U9 VCC Power/Other R8 VSS Power/Other U23 VCC Power/Other R9 VCC Power/Other U24 VSS Power/Other Direction Dual-Core Intel(R) Xeon(R) Processor 2.80 GHz Datasheet Pin Listing Table 5-2. Pin Listing by Pin Number (Cont'd) Pin No. Pin Name Signal Buffer Type U25 VCC U26 U27 U28 U29 Table 5-2. Pin Listing by Pin Number (Cont'd) Pin No. Pin Name Signal Buffer Type Power/Other W27 VCC Power/Other VSS Power/Other W28 VSS Power/Other VCC Power/Other W29 VCC Power/Other VSS Power/Other W30 VSS Power/Other VCC Power/Other W31 VCC Power/Other U30 VSS Power/Other Y1 VSS Power/Other U31 VCC Power/Other Y2 VCC Power/Other V1 VSS Power/Other Y3 Reserved Reserved Reserved V2 VCC Power/Other Y4 BCLK0 Sys Bus Clk Input Direction Direction V3 VSS Power/Other Y5 VSS Power/Other V4 VCC Power/Other Y6 TESTHI3 Power/Other V5 VSS Power/Other Y7 VSS Power/Other V6 VCC Power/Other Y8 RESET# Common Clk Input Input/Output Input V7 VSS Power/Other Y9 D62# Source Sync V8 VCC Power/Other Y10 VTT Power/Other V9 VSS Power/Other Y11 DSTBP3# Source Sync Input/Output V23 VSS Power/Other Y12 DSTBN3# Source Sync Input/Output V24 VCC Power/Other Y13 VSS Power/Other V25 VSS Power/Other Y14 DSTBP2# Source Sync Input/Output V26 VCC Power/Other Y15 DSTBN2# Source Sync Input/Output V27 VSS Power/Other Y16 VCC Power/Other V28 VCC Power/Other Y17 DSTBP1# Source Sync Input/Output V29 VSS Power/Other Y18 DSTBN1# Source Sync Input/Output V30 VCC Power/Other Y19 VSS Power/Other V31 VSS Power/Other Y20 DSTBP0# Source Sync Input/Output W1 VCC Power/Other Y21 DSTBN0# Source Sync Input/Output W2 VSS Power/Other Y22 VCC Power/Other W3 Reserved Reserved Y23 D5# Source Sync Input/Output W4 VSS Power/Other Y24 D2# Source Sync Input/Output Reserved W5 BCLK1 Sys Bus Clk Input Y25 VSS Power/Other W6 TESTHI0 Power/Other Input Y26 D0# Source Sync Input/Output W7 TESTHI1 Power/Other Input Y27 THERMDA Power/Other Output W8 TESTHI2 Power/Other Input Y28 THERMDC Power/Other Output N/C W9 GTLREF Power/Other Input Y29 N/C N/C W23 GTLREF Power/Other Input Y30 VCC Power/Other W24 VSS Power/Other Y31 VSS Power/Other W25 VCC Power/Other AA1 VCC Power/Other W26 VSS Power/Other AA2 VSS Power/Other Dual-Core Intel(R) Xeon(R) Processor 2.80 GHz Datasheet 67 Pin Listing Table 5-2. Pin Listing by Pin Number (Cont'd) Table 5-2. Pin Listing by Pin Number (Cont'd) Pin No. Pin Name Signal Buffer Type Direction Pin No. Pin Name Signal Buffer Type Direction AA3 BSEL0 Power/Other Output AB10 D55# Source Sync Input/Output AB11 VSS Power/Other Input AB12 D51# Source Sync Input/Output AB13 D52# Source Sync Input/Output 68 AA4 VCC Power/Other AA5 VSSA Power/Other AA6 VCC Power/Other AA7 TESTHI4 Power/Other Input AB14 VCC Power/Other AA8 D61# Source Sync Input/Output AB15 D37# Source Sync Input/Output AA9 VSS Power/Other AB16 D32# Source Sync Input/Output AA10 D54# Source Sync Input/Output AB17 D31# Source Sync Input/Output AA11 D53# Source Sync Input/Output AB18 VCC Power/Other AA12 VTT Power/Other AB19 D14# Source Sync Input/Output AA13 D48# Source Sync Input/Output AB20 D12# Source Sync Input/Output AA14 D49# Source Sync Input/Output AB21 VSS Power/Other AA15 VSS Power/Other AB22 D13# Source Sync Input/Output AA16 D33# Source Sync AB23 D9# Source Sync Input/Output AA17 VSS Power/Other AB24 VCC Power/Other AA18 D24# Source Sync Input/Output AB25 D8# Source Sync Input/Output AA19 D15# Source Sync Input/Output AB26 D7# Source Sync Input/Output Input/Output AA20 VCC Power/Other AB27 VSS Power/Other AA21 D11# Source Sync Input/Output AB28 N/C N/C N/C AA22 D10# Source Sync Input/Output AB29 N/C N/C N/C AA23 VSS Power/Other AB30 VCC Power/Other AA24 D6# Source Sync Input/Output AB31 VSS Power/Other AA25 D3# Source Sync Input/Output AC1 Reserved Reserved AA26 VCC Power/Other AC2 VSS Power/Other AA27 D1# Source Sync Input/Output AC3 VCC Power/Other AA28 N/C N/C N/C AC4 VCC Power/Other AA29 N/C N/C N/C AC5 D60# Source Sync Input/Output AA30 VSS Power/Other AC6 D59# Source Sync Input/Output AA31 VCC Power/Other AC7 VSS Power/Other Reserved AB1 VSS Power/Other AC8 D56# Source Sync Input/Output AB2 VCC Power/Other AC9 D47# Source Sync Input/Output AB3 BSEL1 Power/Other Output AC10 VTT Power/Other AB4 VCCA Power/Other Input AC11 D43# Source Sync Input/Output Input/Output AB5 VSS Power/Other AC12 D41# Source Sync AB6 D63# Source Sync Input/Output AC13 VSS Power/Other AB7 PWRGOOD Async GTL+ Input AC14 D50# Source Sync Input/Output AB8 VCC Power/Other AC15 DP2# Common Clk Input/Output AB9 DBI3# Source Sync AC16 VCC Power/Other Input/Output Dual-Core Intel(R) Xeon(R) Processor 2.80 GHz Datasheet Pin Listing Table 5-2. Pin Listing by Pin Number (Cont'd) Table 5-2. Pin Listing by Pin Number (Cont'd) Pin No. Pin Name Signal Buffer Type Direction Pin No. Pin Name Signal Buffer Type Direction AC17 D34# Source Sync Input/Output AD24 D21# Source Sync Input/Output AC18 DP0# Common Clk Input/Output AD25 D18# Source Sync Input/Output AC19 VSS Power/Other AD26 VCC Power/Other AC20 D25# Source Sync Input/Output AD27 D4# Source Sync Input/Output AC21 D26# Source Sync Input/Output AD28 N/C N/C N/C N/C AC22 VCC Power/Other AD29 N/C N/C AC23 D23# Source Sync Input/Output AD30 VCC Power/Other AC24 D20# Source Sync Input/Output AD31 VSS Power/Other AC25 VSS Power/Other AE2 VSS Power/Other AC26 D17# Source Sync Input/Output AE3 VCC Power/Other AC27 DBI0# Source Sync Input/Output AE4 SMB_PRT Power/Other Output AC28 N/C N/C N/C AE5 TESTHI6 Power/Other Input AC29 N/C N/C N/C AE6 SLP# Async GTL+ Input AC30 SLEW_CTRL Power/Other Input AE7 D58# Source Sync Input/Output AC31 VCC Power/Other AE8 VCC Power/Other AD1 VCCPLL Power/Other AE9 D44# Source Sync Input/Output AD2 VCC Power/Other AE10 D42# Source Sync Input/Output Input AD3 VSS Power/Other AE11 VSS Power/Other AD4 VCCIOPLL Power/Other Input AE12 DBI2# Source Sync Input/Output AD5 TESTHI5 Power/Other Input AE13 D35# Source Sync Input/Output AD6 VCC Power/Other AE14 VCC Power/Other AD7 D57# Source Sync Input/Output AE15 Reserved Reserved Reserved AD8 D46# Source Sync Input/Output AE16 Reserved Reserved Reserved AD9 VSS Power/Other AE17 DP3# Common Clk Input/Output AD10 D45# Source Sync Input/Output AE18 VCC Power/Other AD11 D40# Source Sync Input/Output AE19 DP1# Common Clk Input/Output AD12 VTT Power/Other AE20 D28# Source Sync Input/Output AD13 D38# Source Sync Input/Output AE21 VSS Power/Other AD14 D39# Source Sync Input/Output AE22 D27# Source Sync Input/Output AE23 D22# Source Sync Input/Output AE24 VCC Power/Other AE25 D19# Source Sync Input/Output D16# Source Sync Input/Output AD15 VSS Power/Other AD16 COMP0 Power/Other AD17 VSS Power/Other AD18 D36# Source Sync Input/Output AE26 AD19 D30# Source Sync Input/Output AE27 VSS Power/Other AD20 VCC Power/Other AE28 Reserved Reserved Reserved AD21 D29# Source Sync Input/Output AE29 Reserved Reserved Reserved AD22 DBI1# Source Sync Input/Output AE30 N/C N/C N/C AD23 VSS Power/Other Input Dual-Core Intel(R) Xeon(R) Processor 2.80 GHz Datasheet 69 Pin Listing 70 Dual-Core Intel(R) Xeon(R) Processor 2.80 GHz Datasheet 6 Thermal Specifications 6.1 Package Thermal Specifications The Dual-Core Intel Xeon processor requires a thermal solution to maintain temperatures within operating limits. Any attempt to operate the processor outside these operating limits may result in permanent damage to the processor and potentially other components within the system. As processor technology changes, thermal management becomes increasingly crucial when building computer systems. Maintaining the proper thermal environment is key to reliable, long-term system operation. A complete solution includes both component and system level thermal management features. Component level thermal solutions can include active or passive heatsinks attached to the processor Integrated Heat Spreader (IHS). Typical system level thermal solutions may consist of system fans combined with ducting and venting. For more information on designing a component level thermal solution, refer to the Dual-Core Intel(R) Xeon(R) Processor 2.80 GHz Thermal/Mechanical Design Guidelines. Note: 6.1.1 The boxed processor will ship with a component thermal solution. Thermal Specifications To allow the optimal operation and long-term reliability of Intel processor-based systems, the processor must remain within the minimum and maximum case temperature (TCASE) specifications as defined by the applicable thermal profile (see Figure 6-1, Table 6-2 and Table 6-3). Thermal solutions not designed to provide this level of thermal capability may affect the long-term reliability of the processor and system. For more details on thermal solution design, please refer to the appropriate processor thermal/mechanical design guideline. The Dual-Core Intel Xeon processor utilizes a methodology for managing processor temperatures which is intended to support acoustic noise reduction through fan speed control and assure processor reliability. Selection of the appropriate fan speed will be based on the temperature reported by the processor's Thermal Diode. If the diode temperature is greater than or equal to Tcontrol (see Section 6.2.6), then the processor case temperature must remain at or below the temperature as specified by the thermal profile (see Figure 6-1). If the diode temperature is less than Tcontrol, then the case temperature is permitted to exceed the thermal profile, but the diode temperature must remain at or below Tcontrol. Systems that implement fan speed control must be designed to take these conditions into account. Systems that do not alter the fan speed only need to guarantee the case temperature meets the thermal profile specifications. Intel has developed two thermal profiles, either of which can be implemented with the Dual-Core Intel Xeon processor. Both ensure adherence to Intel reliability requirements. Thermal Profile A is representative of a volumetrically unconstrained thermal solution (i.e. industry enabled 2U heat sink). In this scenario, it is expected that the Thermal Control Circuit (TCC) would only be activated for very brief periods of time when running the most power intensive applications. Thermal Profile B is indicative of a constrained thermal environment (i.e. 1U). Because of the reduced cooling capability represented by this thermal solution, the probability of TCC activation and performance loss is increased. Additionally, utilization of a thermal solution that does not meet Thermal Profile B will violate the thermal specifications and may result in permanent damage to Dual-Core Intel(R) Xeon(R) Processor 2.80 GHz Datasheet 71 Thermal Specifications the processor. Intel has developed these thermal profiles to allow OEMs to choose the thermal solution and environmental parameters that best suit their platform implementation. Refer to the appropriate thermal/mechanical design guide for details on system thermal solution design, thermal profiles, and environmental considerations. The upper point of the thermal profile consists of the Thermal Design Power (TDP) defined in Table 6-1 and the associated TCASE value. It should be noted that the upper point associated with Thermal Profile B (x = TDP and y = TCASE_MAX_B @ TDP) represents a thermal solution design point. In actuality the processor case temperature will never reach this value due to TCC activation (see Figure 6-1). The lower point of the thermal profile consists of x = PCONTROL_BASE and y = TCASE_MAX @ PCONTROL_BASE. Pcontrol is defined as the processor power at which TCASE, calculated from the thermal profile, corresponds to the lowest possible value of Tcontrol. This point is associated with the Tcontrol value (see Section 6.2.6) However, because Tcontrol represents a diode temperature, it is necessary to define the associated case temperature. This is TCASE_MAX @ PCONTROL_BASE. Please see Section 6.2.6 and the appropriate thermal/mechanical design guide for proper usage of the Tcontrol specification. The case temperature is defined at the geometric top center of the processor IHS. Analysis indicates that real applications are unlikely to cause the processor to consume maximum power dissipation for sustained time periods. Intel recommends that complete thermal solution designs target the Thermal Design Power (TDP) indicated in Table 6-1, instead of the maximum processor power consumption. The Thermal Monitor feature is intended to help protect the processor in the event that an application exceeds the TDP recommendation for a sustained time period. For more details on this feature, refer to Section 6.2. Thermal Monitor feature must be enabled for the processor to remain within specification. Table 6-1. Dual-Core Intel(R) Xeon(R) Processor Thermal Specifications Core Frequency (GHz) Maximum Power (W) Thermal Design Power (W) Minimum TCASE (C) Maximum TCASE (C) Notes 2.80 GHz 150 135 5 See Figure 6-1; Table 6-2 or Table 6-3 1, 2, 3, 4, 5, 6 NOTES: 1. These values are specified at VCC_MAX for all processor frequencies. Systems must be designed to ensure the processor is not to be subjected to any static VCC and ICC combination wherein VCC exceeds VCC_MAX at specified ICC. Please refer to the VCC static and transient tolerance specifications in Section 2. 2. Listed frequencies are not necessarily committed production frequencies. 3. Maximum Power is the maximum thermal power that can be dissipated by the processor through the integrated heat spreader (IHS). Maximum Power is measured at maximum TCASE. 4. Thermal Design Power (TDP) should be used for processor/chipset thermal solution design targets. TDP is not the maximum power that the processor can dissipate. TDP is measured at maximum TCASE. 5. These specifications are based on final silicon characterization. 6. Power specifications are defined at all VIDs found in Table 2-7. The Dual-Core Intel Xeon processor may be shipped under multiple VIDs listed for each frequency. 72 Dual-Core Intel(R) Xeon(R) Processor 2.80 GHz Datasheet Thermal Specifications Figure 6-1. Dual-Core Intel(R) Xeon(R) Processor Thermal Profiles A and B 90 TCASE_MAX_B @ TDP TCASE_MAX_A @ TDP 80 70 Tcase [C] 60 TCASE_MAX @ Pcontrol_base 50 40 30 20 10 0 0 10 20 30 40 PCONTROL_BASE_B 50 60 70 80 90 100 110 120 Pow er [W] 130 140 TDP PCONTROL_BASE_A Thermal Profile A: PCONTROL_BASE = 31 W; TCASE @ PCONTROL_BASE = 50 C Thermal Profile B: PCONTROL_BASE = 22 W; TCASE @ PCONTROL_BASE = 50 C NOTES: 1. Thermal Profile A is representative of a volumetrically unconstrained platform. Please refer to Table 6-2 for discrete points that constitute the thermal profile. 2. Implementation of Thermal Profile A should result in virtually no TCC activation. Furthermore, utilization of thermal solutions that do not meet processor Thermal Profile A will result in increased probability of TCC activation and may incur measurable performance loss. (See Section 6.2 for details on TCC activation). 3. Thermal Profile B is representative of a volumetrically constrained platform. Please refer to Table 6-2 for discrete points that constitute the thermal profile. 4. Implementation of Thermal Profile B will result in increased probability of TCC activation and may incur measurable performance loss. Furthermore, utilization of thermal solutions that do not meet Thermal Profile B do not meet the processor's thermal specifications and may result in permanent damage to the processor. 5. Refer to the Dual-Core Intel(R) Xeon(R) Processor 2.80 GHz Thermal/Mechanical Design Guidelines for system and environmental implementation details. Dual-Core Intel(R) Xeon(R) Processor 2.80 GHz Datasheet 73 Thermal Specifications Table 6-2. Dual-Core Intel(R) Xeon(R) Processor Thermal Profile A Power [W] PCONTROL_BASE_A 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 64 66 68 70 72 74 76 78 80 74 TCASE_MAX [deg C] = 31 43 50 50 51 51 52 52 52 53 53 54 54 54 55 55 56 56 57 57 57 57 57 58 58 59 59 60 60 Power [W] 82 84 86 88 90 92 94 96 98 100 102 104 106 108 110 112 114 116 118 120 122 124 126 128 130 132 134 135 TCASE_MAX [deg C] 60 61 61 62 62 63 63 63 64 64 65 65 65 66 66 67 67 68 68 68 69 69 70 70 71 71 71 72 Dual-Core Intel(R) Xeon(R) Processor 2.80 GHz Datasheet Thermal Specifications Table 6-3. Dual-Core Intel(R) Xeon(R) Processor Thermal Profile B Pow er [W ] P CONTROL_BASE_B = 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72 74 76 78 6.1.2 T CASE_MAX [deg C] 44 50 51 51 52 52 53 53 54 54 55 55 56 57 57 58 58 59 59 60 60 61 61 62 62 63 63 64 64 Pow er [W ] 80 82 84 86 88 90 92 94 96 98 100 102 104 106 108 110 112 114 116 118 120 122 124 126 128 130 132 134 135 T CASE_MAX [deg C] 65 65 66 66 67 67 68 69 69 70 70 71 71 72 72 73 73 74 74 75 75 76 76 77 77 78 78 79 79 Thermal Metrology The maximum case temperatures (TCASE) are specified in Table 6-2 and Table 6-3 measured at the geometric top center of the processor integrated heat spreader (IHS). Figure 6-2 illustrates the location where TCASE temperature measurements should be made. For detailed guidelines on temperature measurement methodology, refer to the appropriate thermal/mechanical design guide. Dual-Core Intel(R) Xeon(R) Processor 2.80 GHz Datasheet 75 Thermal Specifications Figure 6-2. Case Temperature (TCASE) Measurement Location Measure from edge of processor 15.5 mm [0.61 in] Measure T CASE at this point. 15.5 mm [0.61 in] 53.34 mm FC-mPG A4 Package Note: Figure is not to scale and is for reference only. 6.2 Processor Thermal Features 6.2.1 Thermal Monitor The Thermal Monitor feature helps control the processor temperature by activating the Thermal Control Circuit (TCC) when the processor silicon reaches its maximum operating temperature. The TCC reduces processor power consumption as needed by modulating (starting and stopping) the internal processor core clocks. The Thermal Monitor feature must be enabled for the processor to be operating within specifications. The temperature at which Thermal Monitor activates the thermal control circuit is not user configurable and is not software visible. Bus traffic is snooped in the normal manner, and interrupt requests are latched (and serviced during the time that the clocks are on) while the TCC is active. When the Thermal Monitor is enabled, and a high temperature situation exists (i.e. TCC is active), the clocks will be modulated by alternately turning the clocks off and on at a duty cycle specific to the processor (typically 30 -50%). Clocks will not be off for more than 3 microseconds when the TCC is active. Cycle times are processor speed dependent and will decrease as processor core frequencies increase. A small amount of hysteresis has been included to prevent rapid active/ inactive transitions of the TCC when the processor temperature is near its maximum operating temperature. Once the temperature has dropped below the maximum operating temperature, and the hysteresis timer has expired, the TCC goes inactive and clock modulation ceases. With a thermal solution designed to meet Thermal Profile A, it is anticipated that the TCC would only be activated for very short periods of time when running the most power intensive applications. The processor performance impact due to these brief periods of TCC activation is expected to be so minor that it would be immeasurable. A thermal solution that is designed to Thermal Profile B may cause a noticeable performance loss due to increased TCC activation. Thermal Solutions that exceed Thermal Profile B will exceed the maximum temperature specification and affect the long-term reliability of the processor. In addition, a thermal solution 76 Dual-Core Intel(R) Xeon(R) Processor 2.80 GHz Datasheet Thermal Specifications that is significantly under designed may not be capable of cooling the processor even when the TCC is active continuously. Refer to the appropriate thermal/mechanical design guide for information on designing a thermal solution. The duty cycle for the TCC, when activated by the Thermal Monitor, is factory configured and cannot be modified. The Thermal Monitor does not require any additional hardware, software drivers, or interrupt handling routines. 6.2.2 On-Demand Mode The processor provides an auxiliary mechanism that allows system software to force the processor to reduce its power consumption. This mechanism is referred to as "On-Demand" mode and is distinct from the Thermal Monitor feature. On-Demand mode is intended as a means to reduce system level power consumption. Systems utilizing the Dual-Core Intel Xeon processor must not rely on software usage of this mechanism to limit the processor temperature. If bit 4 of the IA32_CLOCK_MODULATION MSR is written to a `1', the processor will immediately reduce its power consumption via modulation (starting and stopping) of the internal core clock, independent of the processor temperature. When using On-Demand mode, the duty cycle of the clock modulation is programmable via bits 3:1 of the same IA32_CLOCK_MODULATION MSR. In On-Demand mode, the duty cycle can be programmed from 12.5% on/ 87.5% off to 87.5% on/12.5% off in 12.5% increments. On-Demand mode may be used in conjunction with the Thermal Monitor. If the system tries to enable On-Demand mode at the same time the TCC is engaged, the factory configured duty cycle of the TCC will override the duty cycle selected by the On-Demand mode. 6.2.3 PROCHOT# Signal Pin An external signal, PROCHOT# (processor hot) is asserted when the processor die temperature has reached its factory configured trip point. If Thermal Monitor is enabled (note that Thermal Monitor must be enabled for the processor to be operating within specification), the TCC will be active when PROCHOT# is asserted. The processor can be configured to generate an interrupt upon the assertion or de-assertion of PROCHOT#. Refer to the IA-32 Intel(R) Architecture Software Developer's Manual, Volume 3: System Programmer's Guide for specific register and programming details. PROCHOT# is designed to assert at or a few degrees higher than maximum TCASE (as specified by Thermal Profile A) when dissipating TDP power, and cannot be interpreted as an indication of processor case temperature. This temperature delta accounts for processor package, lifetime and manufacturing variations and attempts to ensure the Thermal Control Circuit is not activated below maximum TCASE when dissipating TDP power. There is no defined or fixed correlation between the PROCHOT# trip temperature, the case temperature or the thermal diode temperature. Thermal solutions must be designed to the processor specifications and cannot be adjusted based on experimental measurements of TCASE, PROCHOT#, or Tdiode on random processor samples. 6.2.4 FORCEPR# Signal Pin The FORCEPR# (force power reduction) input can be used by the platform to cause the Dual-Core Intel Xeon processor to activate the TCC of each core. If the Thermal Monitor is enabled, the TCC will be activated upon the assertion of the FORCEPR# signal. The TCC will remain active until the system deasserts FORCEPR#. FORCEPR# is an asynchronous input. FORCEPR# can be used to Dual-Core Intel(R) Xeon(R) Processor 2.80 GHz Datasheet 77 Thermal Specifications thermally protect other system components. To use the VR as an example, when the FORCEPR# pin is asserted, the TCC circuit of each core within the processor will activate, reducing the current consumption of the processor and the corresponding temperature of the VR. If should be noted that assertion of the FORCEPR# does not automatically assert PROCHOT#. As mentioned previously, the PROCHOT# signal is asserted when a high temperature situation is detected. A minimum pulse width of 500 s is recommend when the FORCEPR# is asserted by the system. Sustained activation of the FORCEPR# pin may cause noticeable platform performance degradation. Refer to the appropriate platform design guidelines for details on implementing the FORCEPR# signal feature. 6.2.5 THERMTRIP# Signal Pin Regardless of whether or not Thermal Monitor is enabled, in the event of a catastrophic cooling failure, the processor will automatically shut down when the silicon has reached an elevated temperature (refer to the THERMTRIP# definition in Table 4-1). At this point, the system bus signal THERMTRIP# will go active and stay active as described in Table 4-1. THERMTRIP# activation is independent of processor activity and does not generate any bus cycles. 6.2.6 TCONTROL and Fan Speed Reduction Tcontrol is a temperature specification based on a temperature reading from the thermal diode. The value for Tcontrol will be calibrated in manufacturing and configured for each processor. The Tcontrol temperature for a given processor can be obtained by reading the IA32_TEMPERATURE_TARGET MSR in the processor. Each core within the processor will have an IA32_TEMPERATURE_TARGET MSR that will be programmed to the same value. The Tcontrol value that is read from the IA32_TEMPERATURE_TARGET MSR must be converted from Hexadecimal to Decimal and added to a base value. The base value is 50 C for the Dual-Core Intel Xeon processor. The value of Tcontrol may vary from 0x00h to 0x1Eh. Refer to the IA-32 Intel(R) Architecture Software Developer's Manual, Volume 3: System Programmer's Guide for specific register and implementation details. When Tdiode is above Tcontrol, then TCASE must be at or below TCASE_MAX as defined by the thermal profile. (See Figure 6-1; Table 6-2 and Table 6-3). Otherwise, the processor temperature can be maintained at Tcontrol. 6.2.7 Thermal Diode The processor incorporates an on-die thermal diode. A thermal sensor located on the system board may monitor the die temperature of the processor for thermal management/long term die temperature change purposes. This thermal diode is separate from the Thermal Monitor's thermal sensor and cannot be used to predict the behavior of the Thermal Monitor. 78 Dual-Core Intel(R) Xeon(R) Processor 2.80 GHz Datasheet 7 Features 7.1 Power-On Configuration Options Several configuration options can be configured by hardware. The Dual-Core Intel Xeon processor samples its hardware configuration at reset, on the active-to-inactive transition of RESET#. For specifics on these options, please refer to Table 7-1. The sampled information configures the processor for subsequent operation. These configuration options cannot be changed except by another reset. All resets reconfigure the processor, for reset purposes, the processor does not distinguish between a "warm" reset and a "power-on" reset. Table 7-1. Power-On Configuration Option Pins Configuration Option Pin Notes Output tri state SMI# 1,2,4 Execute BIST (Built-In Self Test) INIT# 1,2,4 In Order Queue de-pipelining (set IOQ depth to 1) A7# 1,2,4 Disable MCERR# observation A9# 1,2,4 Disable BINIT# observation A10# 1,2,4 Disable bus parking A15# 1,2,4 BR[3:0]# 1,2,3,4 A31# 1,2,5 Symmetric agent arbitration ID Enable Single Logical Processor Mode NOTES: 1. Asserting this signal during RESET# will select the corresponding option. 2. Address pins not identified in this table as configuration options should not be asserted during RESET#. 3. The Dual-Core Intel Xeon processor utilizes all four BR0#, BR1#, BR2# and BR3# signals. Please refer to the appropriate platform design guide for further details 4. All power-on configuration settings affect both cores of the processor. 5. This mode not tested. 7.2 Clock Control and Low Power States The processor allows the use of HALT, Stop-Grant and Sleep states to reduce power consumption by stopping the clock to internal sections of the processor, depending on each particular state. See Figure 7-1 for a visual representation of the processor low power states. The Dual-Core Intel Xeon processor adds supports for the Enhanced HALT state. Refer to Figure 7-1 and the following sections. For more configuration details also refer to the IA-32 Intel(R) Architecture Software Developer's Manual, Volume 3: System Programmer's Guide. The Stop Grant state requires chipset and BIOS support on multiprocessor systems. In a multiprocessor system, all the STPCLK# signals are bussed together, thus all processors are affected in unison. The Hyper-Threading Technology feature adds the conditions that all logical processors share the same STPCLK# signal internally. When the STPCLK# signal is asserted, the processor enters the Stop Grant state, issuing a Stop Grant Special Bus Cycle (SBC) for each processor or logical processor. The chipset needs to account for a variable number of processors asserting the Stop Grant SBC on the bus before allowing the processor to be transitioned into one Dual-Core Intel(R) Xeon(R) Processor 2.80 GHz Datasheet 79 Features of the lower processor power states. Refer to the applicable chipset specification and the IA-32 Intel(R) Architecture Software Developer's Manual, Volume 3: System Programmer's Guide for more information. Due to the inability of processors to recognize bus transactions during the Sleep state, multiprocessor systems are not allowed to simultaneously have one processor in Sleep state and the other processors in Normal or Stop-Grant state. 7.2.1 Normal State This is the normal operating state for the processor. 7.2.2 HALT or Enhanced HALT States The Enhanced HALT power down state is enabled by default in the Dual-Core Intel Xeon processor. The Enhanced HALT power down state must remain enabled via the BIOS. Refer to the IA-32 Intel(R) Architecture Software Developer's Manual, Volume 3: System Programmer's Guide. The Enhanced HALT state requires support for dynamic VID transitions in the platform. 7.2.2.1 HALT Powerdown State HALT is a low power state entered when the processor executes the HALT or MWAIT instruction. When one of the logical processors executes the HALT or MWAIT instruction, that logical processor is halted; however, the other processor continues normal operation. The processor will transition to the Normal state upon the occurrence of SMI#, BINIT#, INIT#, LINT[1:0] (NMI, INTR), or an interrupt delivered over the front side bus. RESET# will cause the processor to immediately initialize itself. The return from a System Management Interrupt (SMI) handler can be to either Normal Mode or the HALT Power Down state. See the IA-32 Intel(R) Architecture Software Developer's Manual, Volume 3: System Programmer's Guide for more information. The system can generate a STPCLK# while the processor is in the HALT Power Down state. When the system deasserts the STPCLK# interrupt, the processor will return execution to the HALT state. While in HALT Power Down state, the processor will process front side bus snoops and interrupts. 7.2.2.2 Enhanced HALT Powerdown State Enhanced HALT state is a low power state entered when all logical processors have executed the HALT or MWAIT instruction and Enhanced HALT state has been enabled via the BIOS. When one of the logical processors executes the HALT instruction, that logical processor is halted; however, the other processor continues normal operation. The Enhanced HALT state is generally a lower power state than the Stop Grant state. The processor will automatically transition to a lower core frequency and voltage operating point before entering the Enhanced HALT state. Note that the processor FSB frequency is not altered; only the internal core frequency is changed. When entering the low power state, the processor will first switch to the lower bus ratio and then transition to the lower VID. While in the Enhanced HALT state, the processor will process bus snoops. 80 Dual-Core Intel(R) Xeon(R) Processor 2.80 GHz Datasheet Features The processor exits the Enhanced HALT state when a break event occurs. When the processor exists the Enhanced HALT state, it will first transition the VID to the original value and then change the bus ratio back to the original value. Figure 7-1. Stop Clock State Machine HALT or MWAIT Instruction and HALT Bus Cycle Generated Normal State Normal execution STPCLK# Asserted INIT#, BINIT#, INTR, NMI, SMI#, RESET#, FSB interrupts STPCLK# De-asserted # LK C ted P r ST sse A # d LK te C ser P s ST e-a D Enhanced HALT or HALT State BCLK running Snoops and interrupts allowed Snoop Event Occurs Snoop Event Serviced Enhanced HALT Snoop or HALT Snoop State BCLK running Service snoops to caches Stop Grant State BCLK running Snoops and interrupts allowed SLP# Asserted Snoop Event Occurs Snoop Event Serviced Stop Grant Snoop State BCLK running Service snoops to caches SLP# De-asserted Sleep State BCLK running No snoops or interrupts allowed 7.2.3 Stop-Grant State When the STPCLK# pin is asserted, the Stop-Grant state of the processor is entered 20 bus clocks after the response phase of the processor-issued Stop Grant Acknowledge special bus cycle. Once the STPCLK# pin has been asserted, it may only be deasserted once the processor is in the Stop Grant state. For the Dual-Core Intel Xeon processor, all logical processors must be in the Stop Grant state before the deassertion of STPCLK#. Since the AGTL+ signal pins receive power from the front side 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 front side bus should be driven to the inactive state. BINIT# will not be serviced while the processor is in Stop-Grant state. The event will be latched and can be serviced by software upon exit from the Stop Grant state. Dual-Core Intel(R) Xeon(R) Processor 2.80 GHz Datasheet 81 Features RESET# will cause the processor to immediately initialize itself, but the processor will stay in Stop-Grant state. A transition back to the Normal state will occur with the de-assertion of the STPCLK# signal. When re-entering the Stop-Grant state from the Sleep state, STPCLK# should only be deasserted one or more bus clocks after the deassertion of SLP#. A transition to the Grant Snoop state will occur when the processor detects a snoop on the front side bus (see Section 7.2.4). A transition to the Sleep state (see Section 7.2.5) will occur with the assertion of the SLP# signal. While in the Stop-Grant state, SMI#, INIT#, BINIT# and LINT[1:0] will be latched by the processor, and only serviced when the processor returns to the Normal state. Only one occurrence of each event will be recognized upon return to the Normal state. While in Stop-Grant state, the processor will process snoops on the front side bus and it will latch interrupts delivered on the front side bus. The PBE# signal can be driven when the processor is in Stop-Grant state. PBE# will be asserted if there is any pending interrupt latched within the processor. Pending interrupts that are blocked by the EFLAGS.IF bit being clear will still cause assertion of PBE#. Assertion of PBE# indicates to system logic that it should return the processor to the Normal state. 7.2.4 Enhanced HALT Snoop or HALT Snoop State, Stop Grant Snoop State The Enhanced HALT Snoop state is used in conjunction with the Enhanced HALT state. If Enhanced HALT state is not enabled in the BIOS, the default Snoop state entered will be the HALT Snoop state. Refer to the sections below for details on HALT Snoop state, Grant Snoop state and Enhanced HALT Snoop state. 7.2.4.1 HALT Snoop State, Stop Grant Snoop State The processor will respond to snoop or interrupt transactions on the front side bus while in StopGrant state or in HALT Power Down state. During a snoop or interrupt transaction, the processor enters the HALT/Grant Snoop state. The processor will stay in this state until the snoop on the front side bus has been serviced (whether by the processor or another agent on the front side bus) or the interrupt has been latched. After the snoop is serviced or the interrupt is latched, the processor will return to the Stop-Grant state or HALT Power Down state, as appropriate. 7.2.4.2 Enhanced HALT Snoop State The Enhanced HALT Snoop state is the default Snoop state when the Enhanced HALT state is enabled via the BIOS. The processor will remain in the lower bus ratio and VID operating point of the Enhanced HALT state. While in the Enhanced HALT Snoop state, snoops and interrupt transactions are handled the same way as in the HALT Snoop state. After the snoop is serviced or the interrupt is latched, the processor will return to the Enhanced HALT state. 7.2.5 Sleep State The Sleep state is a very low power state in which each processor maintains its context, maintains the phase-locked loop (PLL), and has stopped most of internal clocks. The Sleep state can only be entered from Stop-Grant state. Once in the Stop-Grant state, the processor will enter the Sleep state 82 Dual-Core Intel(R) Xeon(R) Processor 2.80 GHz Datasheet Features upon the assertion of the SLP# signal. The SLP# pin has a minimum assertion of one BCLK period. The SLP# pin should only be asserted when the processor is in the Stop Grant state. For Dual-Core Intel(R) Xeon(R) processors, the SLP# pin may only be asserted when all logical processors are in the Stop-Grant state. SLP# assertions while the processors are not in the StopGrant state are out of specification and may results in illegal operation. 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 front side 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. When the processor is in Sleep state, it will not respond to interrupts or snoop transactions. 7.3 Enhanced Intel SpeedStep(R) Technology Enhanced Intel SpeedStep Technology enables the processor to switch between multiple frequency and voltage points, which may result in platform power savings. In order to support this technology, the system must support dynamic VID transitions. Switching between voltage / frequency states is software controlled. For more configuration details also refer to the IA-32 Intel(R) Architecture Software Developer's Manual, Volume 3: System Programmer's Guide. Note: Not all processors are capable of supporting Enhanced Intel SpeedStep Technology. Details on which processor frequencies support this feature are provided in the Dual-Core Intel(R) Xeon(R) Processor 2.80 GHz Specification Update. Enhanced Intel SpeedStep Technology is a technology that creates processor performance states (P-states). P-states are power consumption and capability states within the Normal state. Enhanced Intel SpeedStep Technology enables real-time dynamic switching between frequency and voltage points. It alters the performance of the processor by changing the bus to core frequency ratio and voltage. This allows the processor to run at different core frequencies and voltages to best serve the performance and power requirements of the processor and system. Note that the front side bus is not altered; only the internal core frequency is changed. In order to run at reduced power consumption, the voltage is altered in step with the bus ratio. The Dual-Core Intel Xeon processor includes hardware logic that coordinates the requested processor voltage between the cores. The highest voltage that is requested for either of the processor cores is selected for that processor. The following are key features of Enhanced Intel SpeedStep Technology: 1. Multiple voltage / frequency operating points provide optimal performance at reduced power consumption. 2. Voltage / Frequency selection is software controlled by writing to processor MSR's (Model Specific Registers), thus eliminating chipset dependency. If the target frequency is higher than the current frequency, VCC is incremented in steps (+12.5 mV) by placing a new value on the VID signals. The Phase Lock Loop (PLL) then locks to the new frequency. Note that the top frequency for the processor can not be exceeded. Dual-Core Intel(R) Xeon(R) Processor 2.80 GHz Datasheet 83 Features If the target frequency is lower than the current frequency, the PLL locks to the new frequency. The VCC is then decremented in step (-12.5 mV) by changing the target VID through the VID signals. Refer to the IA-32 Intel(R) Architecture Software Developer's Manual, Volume 3: System Programmer's Guide for specific information to enable and configure Enhanced Intel SpeedStep Technology in BIOS. 84 Dual-Core Intel(R) Xeon(R) Processor 2.80 GHz Datasheet 8 Boxed Processor Specifications 8.1 Introduction Intel boxed processors are intended for system integrators who build systems from components available through distribution channels. The Dual-Core Intel Xeon processor is offered as an Intel boxed processor. Intel offers boxed processors with three product configurations available for each processor frequency: 1U passive, 2U passive and 2U+ Active. Although the active thermal solution mechanically fits into a 2U keepout, additional design considerations may need to be addressed to provide sufficient airflow to the fan inlet. The active thermal solution is primarily designed to be used in a pedestal chassis where sufficient air inlet space is present and side directional airflow is not an issue. The 1U and 2U passive thermal solutions require the use of chassis ducting and are targeted for use in rack mount servers. The retention solution used for these products is called the Common Enabling Kit, or CEK. The CEK base is compatible with all three thermal solutions. The active heat sink solution for the boxed processor will be a 4-pin pulse width modulated (PWM) T-diode controlled solution. Use of a 4-pin PWM T-diode controlled active thermal solution helps customers meet acoustic targets in pedestal platforms through the platform's ability to directly control the active thermal solution. It may be necessary to modify existing baseboard designs with 4-pin CPU fan headers and other required circuitry for PWM operation. If a 4-pin PWM T-diode controlled active thermal solution is connected to an older 3-pin CPU fan header, the thermal solution will revert back to a thermistor controlled mode. Please see the Section 8.3, "Electrical Requirements" on page 8-95 for more details. Figure 8-1 through Figure 8-3 are representations of the three heat sink solutions that will be offered as part of a boxed processor. Figure 8-4 shows an exploded view of the boxed processor thermal solution and the other CEK retention components. Figure 8-1. 1U Passive CEK Heat Sink Dual-Core Intel(R) Xeon(R) Processor 2.80 GHz Datasheet 85 Boxed Processor Specifications Figure 8-2. 2U Passive CEK Heat Sink Figure 8-3. Active CEK Heat Sink (Representation Only) 86 Dual-Core Intel(R) Xeon(R) Processor 2.80 GHz Datasheet Boxed Processor Specifications Figure 8-4. Passive Thermal Solution (2U and larger) Heat sink screws Heat sink screw springs Heat sink Heat sink standoffs Thermal Interface Material Motherboard and processor Protective Tape CEK spring Chassis pan NOTE: 1. The heat sink in this image is for reference only, and may not represent any of the actual boxed processor heat sinks. 2. The screws, springs, and standoffs will be captive to the heat sink. This image shows all of the components in an exploded view. 3. It is intended that the CEK spring will ship with the base board and be pre-attached prior to shipping. 8.2 Mechanical Specifications This section documents the mechanical specifications of the boxed processor. 8.2.1 Boxed Processor Heat Sink Dimensions (CEK) The boxed processor will be shipped with an unattached thermal solution. Clearance is required around the thermal solution to ensure unimpeded airflow for proper cooling. The physical space requirements and dimensions for the boxed processor and assembled heat sink are shown in Figure 8-5 through Figure 8-9. Figure 8-10 through Figure 8-11 are the mechanical drawings for the 4-pin server board fan header and 4-pin connector used for the active CEK fan heat sink solution. Dual-Core Intel(R) Xeon(R) Processor 2.80 GHz Datasheet 87 Boxed Processor Specifications Figure 8-5. Top Side Board Keep-Out Zones (Part 1) 88 Dual-Core Intel(R) Xeon(R) Processor 2.80 GHz Datasheet Boxed Processor Specifications Figure 8-6. Top Side Board Keep-Out Zones (Part 2) Dual-Core Intel(R) Xeon(R) Processor 2.80 GHz Datasheet 89 Boxed Processor Specifications Figure 8-7. Bottom Side Board Keep-Out Zones 90 Dual-Core Intel(R) Xeon(R) Processor 2.80 GHz Datasheet Boxed Processor Specifications Figure 8-8. Board Mounting Hole Keep-Out Zones Dual-Core Intel(R) Xeon(R) Processor 2.80 GHz Datasheet 91 Boxed Processor Specifications Figure 8-9. Volumetric Height Keep-Ins 92 Dual-Core Intel(R) Xeon(R) Processor 2.80 GHz Datasheet Boxed Processor Specifications Figure 8-10. 4-Pin Fan Cable Connector (For Active CEK Heat Sink) Dual-Core Intel(R) Xeon(R) Processor 2.80 GHz Datasheet 93 Boxed Processor Specifications Figure 8-11. 4-Pin Base Board Fan Header (For Active CEK Heat Sink) 94 Dual-Core Intel(R) Xeon(R) Processor 2.80 GHz Datasheet Boxed Processor Specifications 8.2.2 Boxed Processor Heat Sink Weight 8.2.2.1 Thermal Solution Weight The 2U passive and 2U+ active heat sink solutions will not exceed a mass of 1050 grams. Note that this is per processor, therefore a dual processor system will likely have up to 2100 grams of total mass for the heat sinks alone. The 1U CEK heat sink will not exceed a mass of 700 grams, for a total of 1400 grams of heat sink mass in a dual processor system. This large mass requires that minimum chassis stiffness be met in order to withstand reasonable shock and vibration forces. Please refer to Section 3.6 for details on the weight of the processor. 8.2.3 Boxed Processor Retention Mechanism and Heat Sink Support (CEK) Baseboards and chassis designed for use by a system integrator should include holes that are in proper alignment with each other to support the boxed processor. Refer to the Server System Infrastructure Specification (SSI-EEB 3.51) or see http://www.ssiforum.org for details on the hole locations. Figure 8-4 illustrates the new Common Enabling Kit (CEK) retention solution. The CEK is designed to extend air-cooling capability through the use of larger heat sinks with minimal airflow blockage and bypass. CEK retention mechanisms can allow the use of much heavier heat sink masses compared to legacy limits by using a load path directly attached to the chassis pan. The CEK spring on the secondary side of the baseboard provides the necessary compressive load for the thermal interface material. The baseboard is intended to be isolated such that the dynamic loads from the heat sink are transferred to the chassis pan via the stiff screws and standoffs. The retention scheme reduces the risk of package pullout and solder joint failures. The baseboard mounting holes for the CEK solution are the same location as the legacy server processor hole locations, as specified by the SSI EEB 3.5. However, the CEK assembly requires larger diameter holes to compensate for the CEK spring embosses. The holes now need to be 10.2 mm [0.402 in.] in diameter. All components of the CEK heat sink solution will be captive to the heat sink and will only require a Phillips screwdriver to attach to the chassis pan. When installing the CEK, the CEK screws should be tightened until they will no longer turn easily. This should represent approximately 8 inch-pounds of torque. Avoid applying more than 10 inch-pounds of torque; otherwise, damage may occur to retention mechanism components. For further details on the CEK thermal solution, refer to the Dual-Core Intel(R) Xeon(R) Processor 2.80 GHz Thermal/Mechanical Design Guidelines (see Section 1.2). 8.3 Electrical Requirements 8.3.1 Power Supply Requirements Due to the design differences between the Dual-Core Intel Xeon processor and the 64-bit Intel(R) Xeon(R) processor with 2MB L2 cache, the Dual-Core Intel Xeon processor has slightly greater +12V rail current requirements. Systems using Dual-Core Intel Xeon processors require power supply designs with split +12V rails capable of supplying a minimum of 15 amps of continuous Dual-Core Intel(R) Xeon(R) Processor 2.80 GHz Datasheet 95 Boxed Processor Specifications current while also being able to supply up to 17.5 amps at peak load times. Power supplies not meeting these criteria should not be used in systems using the Dual-Core Intel Xeon processor as these systems may exhibit unstable behavior, particularly during peak load times. 8.3.2 Fan Power Supply (Active CEK) The 4-pin PWM/T-diode controlled active thermal solution is being offered to help provide better control over pedestal chassis acoustics. This is achieved though more accurate measurement of processor die temperature through the processor's temperature diode (T-diode). Fan RPM is modulated through the use of an ASIC located on the baseboard, that sends out a PWM control signal to the 4th pin of the connector labeled as Control. This thermal solution requires a constant +12 V supplied to pin 2 of the active thermal solution and does not support variable voltage control or 3-pin PWM control. See Table 8-2 for details on the 3- and 4-pin active heat sink solution connectors. If the new 4-pin active fan heat sink solution is connected to an older 3-pin baseboard CPU fan header it will default back to a thermistor controlled mode, allowing compatibility with existing designs. When operating in thermistor controlled mode, fan RPM is automatically varied based on the TINLET temperature measured by a thermistor located at the fan inlet. It may be necessary to change existing baseboard designs to support the new 4-pin active heat sink solution if PWM/ T-diode control is desired. It may also be necessary to verify that the larger 4-pin fan connector will not interfere with other components installed on the baseboard. The fan power header on the baseboard must be positioned to allow the fan heat sink power cable to reach it. The fan power header identification and location must be documented in the suppliers platform documentation, or on the baseboard itself. The baseboard fan power header should be positioned within 177.8 mm [7 in.] from the center of the processor socket. Table 8-1. PWM Fan Frequency Specifications for 4-Pin Active CEK Thermal Solution Description Min Frequency Nominal Frequency Max Frequency Unit PWM Control Frequency Range 21,000 25,000 28,000 Hz Table 8-2. Fan Specifications for 4-pin Active CEK Thermal Solution Min Typ Steady Max Steady Max Startup Unit +12 V: 12 volt fan power supply 10.8 12 12 13.2 V IC: Fan Current Draw N/A 1 1.25 1.5 A 2 2 2 2 Pulses per fan revolution Description SENSE: SENSE frequency 96 Dual-Core Intel(R) Xeon(R) Processor 2.80 GHz Datasheet Boxed Processor Specifications Figure 8-12. Fan Cable Connector Pin Out for 4-Pin Active CEK Thermal Solution Table 8-3. Fan Cable Connector Pin Out for 4-Pin Active CEK Thermal Solution Pin Number Signal Color 1 Ground Black 2 Power: (+12 V) Yellow 3 Sense: 2 pulses per revolution Green 4 Control: 21 KHz-28 KHz Blue Table 8-4. Fan Cable Connector Supplier & Part Number Vendor 3-Pin Connector Part Number 4-Pin Connector Part Number AMP Fan Connector: 643815-3 N/A Header: 640456-3 Walden Fan Connector: 22-01-3037 Fan Connector: 47054-1000 Molex Header: 22-23-2031 Header: 47053-1000 Wieson N/A Fan Connector: 2510C888-001 Header: 2366C888-007 Foxconn N/A Fan Connector: N/A Header: HF27040-M1 This section describes the cooling requirements of the heat sink solution utilized by the boxed processor. 8.3.3 Boxed Processor Cooling Requirements As previously stated the boxed processor will be available in three product configurations. Each configuration will require unique design considerations. Meeting the processor's temperature specifications is also the function of the thermal design of the entire system, and ultimately the responsibility of the system integrator. The processor temperature specifications are found in Section 6 of this document. 8.3.3.1 1U Passive CEK Heat Sink (1U form factor) In the 1U configuration it is assumed that a chassis duct will be implemented to provide 15 CFM [x m3/hr] of airflow to pass through the heat sink fins. The duct should be designed as precisely as possible and should not allow any air to bypass the heat sink (0" bypass) and a back pressure of 0.375 in. H2O [y dP] (25.5m3/hr @ 93.3Pa). It is assumed that a 40 C TLA is met. This requires a Dual-Core Intel(R) Xeon(R) Processor 2.80 GHz Datasheet 97 Boxed Processor Specifications superior chassis design to limit the TRISE at or below 5 C with an external ambient temperature of 35 C. Following these guidelines will allow the designer to meet Thermal Profile B and conform to the thermal requirements of the processor. 8.3.3.2 2U Passive CEK Heat Sink (2U and above form factor) Once again a chassis duct is required for the 2U passive heat sink. In this configuration Thermal Profile A (see Section 6) should be followed by supplying 22 CFM [x m3/hr] of airflow through the fins of the heat sink with a 0" or no duct bypass and a back pressure of 0.142 in. H2O [y dP] (37.4m3/hr @ 35.5 Pa). The TLA temperature of 40 C should be met. This may require the use of superior design techniques to keep TRISE at or below 5 C based on an ambient external temperature of 35 C. 8.3.3.3 2U+ Active CEK Thermal Solution (2U+ and above pedestal) This thermal solution was designed to help pedestal chassis users to meet the thermal processor requirements without the use of chassis ducting. It may be necessary to implement some form of chassis air guide or air duct to meet the TLA temperature of 40 C depending on the pedestal chassis layout. Also, while the active thermal solution is designed to mechanically fit into a 2U chassis, it may require additional space at the top of the thermal solution to allow sufficient airflow into the heat sink fan. Therefore, additional design criteria may need to be considered if this thermal solution is used in a 2U rack mount chassis, or in a chassis that has drive bay obstructions above the inlet to the fan heat sink. Thermal Profile A should be used to help determine the thermal performance of the platform. Once again it is recommended that the ambient air temperature outside of the chassis be kept at or below 35 C. The air passing directly over the processor thermal solution should not be preheated by other system components. Meeting the processor's temperature specification is the responsibility of the system integrator. 8.4 Boxed Processor Contents A direct chassis attach method must be used to avoid problems related to shock and vibration, due to the weight of the thermal solution required to cool the processor. The board must not bend beyond specification in order to avoid damage. The boxed processor contains the components necessary to solve both issues. The boxed processor will include the following items: * * * * * * Dual-Core Intel Xeon processor Unattached (Active or Passive) Thermal Solution 4 screws, 4 springs, and 4 heat sink standoffs (all captive to the heat sink) Thermal Interface Material (pre-applied on heat sink) Installation Manual Intel Inside(R) Logo The other items listed in Figure 8-4 that are required to compete this solution will be shipped with either the chassis or boards. They are as follows: * Heat sink standoffs (supplied by chassis vendors) 98 Dual-Core Intel(R) Xeon(R) Processor 2.80 GHz Datasheet 9 Debug Tools Specifications Please refer to the ITP700 Debug Port Design Guide for information regarding debug tool specifications. Section 1.2 provides collateral details. 9.1 Debug Port System Requirements The Dual-Core Intel Xeon processor debug port is the command and control interface for the InTarget Probe (ITP) debugger. The ITP enables run-time control of the processors for system debug. The debug port, which is connected to the front side bus, is a combination of the system, JTAG and execution signals. There are several mechanical, electrical and functional constraints on the debug port that must be followed. The mechanical constraint requires the debug port connector to be installed in the system with adequate physical clearance. Electrical constraints exist due to the mixed high and low speed signals of the debug port for the processor. While the JTAG signals operate at a maximum of 75 MHz, the execution signals operate at the common clock front side bus frequency (200 MHz). The functional constraint requires the debug port to use the JTAG system via a handshake and multiplexing scheme. In general, the information in this chapter may be used as a basis for including all run-control tools in Dual-Core Intel Xeon processor-based system designs, including tools from vendors other than Intel. Note: The debug port and JTAG signal chain must be designed into the processor board to utilize the ITP for debug purposes. 9.2 Target System Implementation 9.2.1 System Implementation Specific connectivity and layout guidelines for the Debug Port are provided in the ITP700 Debug Port Design Guide. 9.3 Logic Analyzer Interface (LAI) Intel is working with two logic analyzer vendors to provide logic analyzer interfaces (LAIs) for use in debugging Dual-Core Intel Xeon processor systems. Tektronix and Agilent should be contacted to obtain specific information about their logic analyzer interfaces. The following information is general in nature. Specific information must be obtained from the logic analyzer vendor. Due to the complexity of Dual-Core Intel Xeon processor-based multiprocessor systems, the LAI is critical in providing the ability to probe and capture front side bus signals. There are two sets of considerations to keep in mind when designing a Dual-Core Intel Xeon processor-based system that can make use of an LAI: mechanical and electrical. Dual-Core Intel(R) Xeon(R) Processor 2.80 GHz Datasheet 99 Debug Tools Specifications 9.3.1 Mechanical Considerations The LAI is installed between the processor socket and the processor. The LAI pins plug into the socket, while the processor pins plug into a socket on the LAI. Cabling that is part of the LAI egresses the system to allow an electrical connection between the processor and a logic analyzer. The maximum volume occupied by the LAI, known as the keepout volume, as well as the cable egress restrictions, should be obtained from the logic analyzer vendor. System designers must make sure that the keepout volume remains unobstructed inside the system. Note that it is possible that the keepout volume reserved for the LAI may include differerent requirements from the space normally occupied by the heat sink. If this is the case, the logic analyzer vendor will provide a cooling solution as part of the LAI. 9.3.2 Electrical Considerations The LAI will also affect the electrical performance of the front side bus, therefore it is critical to obtain electrical load models from each of the logic analyzer vendors to be able to run system level simulations to prove that their tool will work in the system. Contact the logic analyzer vendor for electrical specifications and load models for the LAI solution they provide. 100 Dual-Core Intel(R) Xeon(R) Processor 2.80 GHz Datasheet