Digital Equipment Corporation AlphaPC 164SX Specifications

Digital Equipment CorporationMaynard, Massachusettshttp://www.digital.com/semiconductorDIGITAL SemiconductorAlphaPC 164SX MotherboardTechnical Referen

x26 November 1997 – Subject To Change• Chapter 1, Introduction, is an overview of the AlphaPC 164SX motherboard, including its components, features, a

26 November 1997 – Subject To Changexi• Binary MultiplesThe abbreviations K, M, and G (kilo, mega, and giga) represent binary multiples and have the f

xii26 November 1997 – Subject To ChangeNoteNotes emphasize particularly important information.NumberingAll numbers are decimal or hexadecimal unless o

26 November 1997 – Subject To ChangexiiiSignal NamesAll signal names are printed in boldface type. Signal names that originate in an industry-standard

xiv26 November 1997 – Subject To Change– An occurrence specified as UNPREDICTABLE may or may not hap-pen based on an arbitrary choice function. The c

26 November 1997 – Subject To ChangeIntroduction 1–1 1IntroductionThis chapter provides an overview of DIGITAL Semiconductor’s AlphaPC 164SX motherboa

1–2 Introduction26 November 1997 – Subject To ChangeSystem Components and FeaturesFigure 1–1 AlphaPC 164SX Functional Block DiagramAlpha 21164PC Micro

26 November 1997 – Subject To ChangeIntroduction 1–3System Components and Features1.1.1 DIGITAL Semiconductor 21174 Core Logic ChipThe Alpha 21164PC m

1–4 Introduction26 November 1997 – Subject To ChangeSystem Components and Features1.1.3 L2 Bcache Subsystem OverviewThe AlphaPC 164SX board-level L2 b

26 November 1997 – Subject To ChangeIntroduction 1–5Software Support– A 14.318-MHz crystal and frequency generator provide a clock source for the comb

November 1997While DIGITAL believes the information included in this publication is correct as of the date of publication, it is subject to change wit

1–6 Introduction26 November 1997 – Subject To ChangeHardware Design Support1.2.3 Motherboard Software Developer’s Kit (SDK)The SDK and Firmware Update

26 November 1997 – Subject To ChangeSystem Configuration and Connectors 2–1 2System Configuration and ConnectorsThis chapter describes the AlphaPC 164

2–2 System Configuration and Connectors26 November 1997 – Subject To ChangeFigure 2–1 AlphaPC 164SX Switch/Connector/Component LocationXU59Q8J1J2J3J4J

26 November 1997 – Subject To ChangeSystem Configuration and Connectors 2–3Table 2–1 AlphaPC 164SX Switch/Connector/Component ListItem No. Description

2–4 System Configuration and Connectors26 November 1997 – Subject To ChangeAlphaPC 164SX Configuration Switches2.1 AlphaPC 164SX Configuration Switche

26 November 1997 – Subject To ChangeSystem Configuration and Connectors 2–5Bcache Size Switches (CF0 and CF1)2.3 Bcache Size Switches (CF0 and CF1)The

2–6 System Configuration and Connectors26 November 1997 – Subject To ChangeMini-Debugger (CF3)2.6 Mini-Debugger (CF3)The Alpha SROM Mini-Debugger is s

26 November 1997 – Subject To ChangeSystem Configuration and Connectors 2–7AlphaPC 164SX Connector PinoutsB15 Gnd B16 CLK B17 Gnd B18 REQ#B19 Vdd B20

2–8 System Configuration and Connectors26 November 1997 – Subject To ChangeAlphaPC 164SX Connector Pinouts2.7.2 ISA Expansion Bus Connector PinoutsTab

26 November 1997 – Subject To ChangeSystem Configuration and Connectors 2–9AlphaPC 164SX Connector Pinouts2.7.3 SDRAM DIMM Connector PinoutsTable 2–4

26 November 1997 – Subject to Changeiii ContentsPreface1 Introduction1.1 System Components and Features . . . . . . . . . . . . . . . . . . . . . . .

2–10 System Configuration and Connectors26 November 1997 – Subject To ChangeAlphaPC 164SX Connector Pinouts2.7.4 EIDE Drive Bus Connector PinoutsTable

26 November 1997 – Subject To ChangeSystem Configuration and Connectors 2–11AlphaPC 164SX Connector Pinouts2.7.5 Diskette (Floppy) Drive Bus Connector

2–12 System Configuration and Connectors26 November 1997 – Subject To ChangeAlphaPC 164SX Connector Pinouts2.7.7 COM1/COM2 Serial Line Connector Pinou

26 November 1997 – Subject To ChangeSystem Configuration and Connectors 2–13AlphaPC 164SX Connector Pinouts2.7.9 SROM Test Data Input Connector Pinout

2–14 System Configuration and Connectors26 November 1997 – Subject To ChangeAlphaPC 164SX Connector Pinouts2.7.12 Microprocessor Fan Power Connector P

26 November 1997 – Subject To ChangeSystem Configuration and Connectors 2–15AlphaPC 164SX Connector PinoutsFigure 2–3 Multipurpose Connector Pinouts1T

26 November 1997 – Subject To ChangePower and Environmental Requirements 3–1 3Power and Environmental RequirementsThis chapter describes the AlphaPC 1

3–2 Power and Environmental Requirements26 November 1997 – Subject To ChangeEnvironmental Requirements3.2 Environmental RequirementsThe 21164PC microp

26 November 1997 – Subject To ChangePower and Environmental Requirements 3–3Board Dimensions3.3.1 ATX Hole SpecificationFigure 3–1 shows the ATX hole

iv26 November 1997 – Subject to Change2.7.7 COM1/COM2 Serial Line Connector Pinouts. . . . . . . . . . . . . . . . . . . . . . . . . 2-122.7.8 Keyboar

3–4 Power and Environmental Requirements26 November 1997 – Subject To ChangeBoard Dimensions3.3.2 ATX I/O Shield RequirementsFigure 3–2 shows the ATX

26 November 1997 – Subject To ChangeFunctional Description 4–1 4Functional DescriptionThis chapter describes the functional operation of the AlphaPC 1

4–2 Functional Description26 November 1997 – Subject To ChangeAlphaPC 164SX Bcache Interface4.1 AlphaPC 164SX Bcache InterfaceThe 21164PC microprocess

26 November 1997 – Subject To ChangeFunctional Description 4–3DIGITAL Semiconductor 21174 Core Logic Chip4.2 DIGITAL Semiconductor 21174 Core Logic Ch

4–4 Functional Description26 November 1997 – Subject To ChangeDIGITAL Semiconductor 21174 Core Logic ChipThe 21174 chip provides the following functio

26 November 1997 – Subject To ChangeFunctional Description 4–5DIGITAL Semiconductor 21174 Core Logic Chip4.2.3 PCI DevicesThe AlphaPC 164SX uses the P

4–6 Functional Description26 November 1997 – Subject To ChangeISA Bus DevicesThe bridge from the 21164PC system bus to the 64-bit PCI bus is provided

26 November 1997 – Subject To ChangeFunctional Description 4–7ISA Bus Devices4.3.1 Combination Controller ChipThe AlphaPC 164SX uses the Standard Micr

4–8 Functional Description26 November 1997 – Subject To ChangeISA Bus DevicesFigure 4–4 AlphaPC 164SX ISA Bus Devices4.3.2 ISA Expansion SlotsTwo ISA

26 November 1997 – Subject To ChangeFunctional Description 4–9Interrupts4.3.4 Flash ROM Address MapAfter reset, the flash ROM is set to location 0. Th

26 November 1997 – Subject to Changev5.3.2 Required Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4–10 Functional Description26 November 1997 – Subject To ChangeInterruptsregister. Interrupts latched in the interrupt request register can be reset i

26 November 1997 – Subject To ChangeFunctional Description 4–11Interrupts 1The # symbol indicates an active low signal.Table 4–3 ISA InterruptsInterru

4–12 Functional Description26 November 1997 – Subject To ChangeSystem Clocks4.5 System ClocksFigure 4–6 shows the AlphaPC 164SX clock generation and d

26 November 1997 – Subject To ChangeFunctional Description 4–13System ClocksFigure 4–6 AlphaPC 164SX System ClocksAt system reset, the clock synthesiz

4–14 Functional Description26 November 1997 – Subject To ChangeReset and InitializationThe 21164PC microprocessor produces the divided clock output si

26 November 1997 – Subject To ChangeFunctional Description 4–15DC Power Distribution4.7 DC Power DistributionThe AlphaPC 164SX derives its system powe

4–16 Functional Description26 November 1997 – Subject To ChangeSerial ROM and Debug Port Support4.8 Serial ROM and Debug Port SupportThough it is not

26 November 1997 – Subject To ChangeUpgrading the AlphaPC 164SX 5–1 5Upgrading the AlphaPC 164SXFor higher system speed or greater throughput, SDRAM m

5–2 Upgrading the AlphaPC 164SX26 November 1997 – Subject To ChangeUpgrading SDRAM Memory5.2 Upgrading SDRAM MemoryYou can upgrade memory in the Alpha

26 November 1997 – Subject To ChangeUpgrading the AlphaPC 164SX 5–3Increasing Microprocessor Speed5.3 Increasing Microprocessor SpeedThis section desc

vi26 November 1997 – Subject to ChangeFigures1–1 AlphaPC 164SX Functional Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

5–4 Upgrading the AlphaPC 164SX26 November 1997 – Subject To ChangeIncreasing Microprocessor Speed5.3.3 Removing the 21164PC MicroprocessorRemove the

26 November 1997 – Subject To ChangeUpgrading the AlphaPC 164SX 5–5Increasing Microprocessor SpeedFigure 5–1 Fan/Heat-Sink Assemblya. Put the GRAFOIL

5–6 Upgrading the AlphaPC 164SX26 November 1997 – Subject To ChangeIncreasing Microprocessor Speedb. Attach the microprocessor heat sink. The heat-sin

26 November 1997 – Subject To ChangeSupporting Products A–1 ASupporting ProductsThis appendix lists sources for components and accessories that are no

A–2 Supporting Products26 November 1997 – Subject To ChangeMemoryViking Componentsattn: Carl Johnson, OEM Development Executive30200 Avenida de la Ban

26 November 1997 – Subject To ChangeSupporting Products A–3Thermal ProductsKingston Technology Company17600 Newhope StreetFountain Valley, CA 92708Pho

A–4 Supporting Products26 November 1997 – Subject To ChangePower SupplyA.4 Power SupplyAn ATX form-factor power supply, suitable for use with the Alph

26 November 1997 – Subject to ChangeSupport, Products, and Documentation B–1 BSupport, Products, and DocumentationIf you need technical support, a DIG

B–2 Support, Products, and Documentation26 November 1997 – Subject to ChangeDIGITAL Semiconductor ProductsTo order the AlphaPC 164SX motherboard, cont

26 November 1997 – Subject to ChangeSupport, Products, and Documentation B–3DIGITAL Semiconductor DocumentationThe following table lists some of the a

26 November 1997 – Subject to ChangeviiTables1–1 AlphaPC 164SX SDRAM Memory Configurations . . . . . . . . . . . . . . . . . . . . . . . . 1-32–1 Alph

26 November 1997 – Subject to ChangeIndex–1Index Numerics21164 microprocessor. See Microprocessor.21174 Core logic chip. See Core logic chip.37C669. S

Index–226 November 1997 – Subject to ChangeEEnvironmental requirements, 3-2Extents and ranges, xiiFFDC37C669. See Combination controller.Flash ROMAlph

26 November 1997 – Subject to ChangeIndex–3Power supplydc ampere requirements, 3-1wattage requirements, 3-1Processor. See Microprocessor.PTE, 4-4RRang

26 November 1997 – Subject to Changeix PrefaceOverviewThis manual describes the DIGITAL AlphaPC 164SX motherboard, a board for computing systems based