HP 8000 manual Power Control, Power Button Actions, Pressed Power Button Results, System State

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Power and Signal Distribution

The +12Vsb (auxilary) voltage is always produced by the power supply unit as long as the system is connected to a live AC source. When the PS On signal is asserted, the power supply unit produces the +12 Vmain, +12 Vcpu, and -12 V outputs.

The standard 240-watt and 320-watt power suppies have a 70% minimum efficiency rating at 100% of the rated load, measured while operating from 100 VAC @60 Hz and 230 VAC @ 50 Hz.

The optional high-efficiency 240-watt and 320-watt power supplies operate at the following efficiencies while operating from 100 VAC @60 Hz and 230 VAC @ 50 Hz :

100% of rated load: 85% efficient

50% of rated load: 89% efficient

20% of rated load: 87% efficient

7.4Power Control

System power is controlled through the power button and though external events.

7.4.1 Power Button

Pressing and releasing the power button applies a negative (grounding) pulse to the power control logic on the system board. The resultant action of pressing the power button depends on the state and mode of the system at that time and is described as follows:

 

 

Table 7-4.

 

 

 

Power Button Actions

 

 

 

 

 

 

System State

Pressed Power Button Results In:

 

 

Off

Negative pulse, of which the falling edge results in power control logic

 

 

 

asserting PS On signal to Power Supply Assembly, which then initializes. ACPI

 

 

 

four-second counter is not active.

 

 

 

 

 

 

On, ACPI Disabled

Negative pulse, of which the falling edge causes power control logic to

 

 

 

de-assert the PS On signal. ACPI four-second counter is not active.

 

 

 

 

 

 

On, ACPI Enabled

Pressed and Released Under Four Seconds:

 

 

 

Negative pulse, of which the falling edge causes power control logic to

 

 

 

generate SMI-, set a bit in the SMI source register, set a bit for button status,

 

 

 

and start four-second counter. Software should clear the button status bit within

 

 

 

four seconds and the Suspend state is entered. If the status bit is not cleared by

 

 

 

software in four seconds PS On is de-asserted and the power supply assembly

 

 

 

shuts down (this operation is meant as a guard if the OS is hung).

 

 

 

Pressed and Held At least Four Seconds Before Release:

 

 

 

If the button is held in for at least four seconds and then released, PS On is

 

 

 

negated, de-activating the power supply.

 

 

 

 

 

 

7-4

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Technical Reference Guide

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Contents Technical Reference Guide DecemberTechnical Reference Guide Contents Processor/Memory Subsystem System SupportInput/Output Interfaces Power and Signal Distribution Integrated Graphics SubsystemSystem Bios Error Messages and Codes IndexAdditional Information Sources IntroductionAbout this Guide Online ViewingSpecial Notices Serial NumberNotational Conventions ValuesCommon Acronyms and Abbreviations Acronyms and AbbreviationsAcronym or Abbreviation Description CMC CDSCGA CmosEide EisaEPP EscdISA IPLIRQ LANPAL NvramODD PataSEC SdramSdvo SecamUdimm UartUdma URLIntroduction System Overview IntroductionFeatures Feature Differences by Form Factor 1ODDSystem Architecture Architectural Differences by Form FactorFunction HP Compaq 8000 Elite Business PC Architecture, Block diagram Chipset Components and Functionality Intel Processor SupportChipset Components FunctionSupport Component Functions Support ComponentsSystem Memory Component Name FunctionUniversal Serial Bus Interface Mass StorageSerial Interface Network Interface ControllerIntegrated Graphics Subsystem Statistics Graphics SubsystemAudio Subsystem Integrated Graphics ControllerHP ProtectTools Embedded Security SpecificationsEnvironmental Specifications Factory Configuration Parameter Operating Non-operatingParameter Value Power Supply Electrical SpecificationsPhysical Specifications Parameter Usdt SFF CMTSystem Overview Processor/Memory Subsystem Processor/Memory Subsystem ArchitectureIntel Processors Intel Processor OverviewHighest Clock Processor Changing/UpgradingSupported Processors partial listing FormMemory Subsystem Memory Socket Loading Memory UpgradingMemory Mapping and Pre-allocation Channel a Channel B Socket Socket 2 Socket 4 TotalSystem Memory Map for maximum of 8 gigabytes System Support PCI Bus OverviewPCI 2.3 Bus Operation PCI Component Configuration Access PCI Bus PCI Component Function # Device # Wired toTransaction Protocol Layer PCI Express Bus OperationSoftware/Driver Layer PCI Bus Mastering DevicesPCI Interrupts PCI Power Management SupportOption ROM Mapping Link LayerPCI Connectors PCI 2.3 ConnectorPCI 2.3 Bus Connector Pinout PCIe Connectors PCIe Bus Connector PinoutInterrupts Apic ModeSystem Resources ModeDirect Memory Access PCI Interrupt DistributionReal-Time Clock and Configuration Memory Clearing CmosStandard Cmos Locations Configuration Memory Cmos MapSystem Management Security FunctionsCable Lock Provision Power-On / Setup PasswordSetup Password Interface SecurityAcpi Wake-Up Events Power ManagementSmart Cover Lock Optional Acpi Wake-Up Event System Wakes FromThermal Sensing and Cooling System Status PowerLED Beeps Action RequiredSystem Status System Operational Status LED IndicationsRegister Map and Miscellaneous Functions System I/O MapSystem I/O Map Port FunctionGpio Functions ICH10 FunctionsSIO Controller Functions Input/Output Interfaces Sata interface Pin Sata Connector PinoutSATA/eSATA Interfaces Pin DescriptionOptional eSATA Bracket/Cable Assembly ESATA interfaceDB-9 Serial Connector Pinout Pin Signal DescriptionSerial Interface Extended Capabilities Port Mode Standard Parallel Port ModeEnhanced Parallel Port Mode Parallel Interface SupportParallel Interface Connector DB-25 Parallel Connector PinoutPin Signal Function Keyboard/Pointing Device Interface Keyboard Interface OperationPointing Device Interface Operation Keyboard/Pointing Device Interface ConnectorKeyboard/Pointing Device Connector Pinout DataUniversal Serial Bus Interface USB ConnectorController Signals USB Connector Location all form factors ICH10 USB Port MappingUSB Cable Length Data USB Connector PinoutUSB Cable Data USB Color CodeAudio Subsystem Functional Block Diagram Audio SubsystemHD Audio Controller HD Audio Link BusAudio Multistreaming Parameter Measurement Audio SpecificationsHD Audio Subsystem Specifications ADC/DACNetwork Interface Controller 10. LAN LED IndicationsFunction Activity LED Speed LED Power Management Support Wake-On-LAN SupportAlert Standard Format Support 11. NIC Specifications NIC ConnectorNIC Specifications Parameter Compatibility standard orprotocolIntegrated Graphics Subsystem Functional Description RGBSdram Installed Maximum Memory Allocation GMA 4500 Memory AllocationResolution Maximum Refresh Rate Analog Digital Monitor Display ModesIGC Standard 2D Display Modes Upgrading Monitor Connectors Analog Monitor ConnectorDB-15 Monitor Connector Pinout DisplayPort Connector Pin SignalIntegrated Graphics Subsystem Power and Signal Distribution Usdt Power DistributionSFF/CMT Power Distribution Usdt 135-Watt Power Supply Unit SpecificationsParameter SFF 240-Watt Power Supply Unit Specifications CMT 320-Watt Power Supply Unit SpecificationsPower Button Actions Power ControlPower Button Pressed Power Button ResultsPower LED Indications Condition Power Management Wake Up EventsState System Condition System Power StatesPower Transition OS Restart Consumption To S0 by RequiredSignal Distribution CR1 +5 VDC LEDSystem Board Connector, Indicator, and Switch Designations Power and Signal Distribution System Bios ROM Flashing UpgradingChangeable Splash Screen Network Boot F12 Support Boot FunctionsBoot Device Order Memory Detection and ConfigurationBoot Error Codes Boot Error CodesVisual power LED Audible speaker Meaning Function Mode Client Management FunctionsClient Management Functions INT15 System ID Numbers Temperature StatusSystem ID and ROM Type System Form Factor System IDSmbios Functions Type DataUSB Legacy Support Management Engine FunctionsTable A-1 Beep/Power LED Codes Error Messages and CodesBeep/Power LED Codes Beeps Power LED Probable CausePower-On Self Test Post Messages Table A-2 Error Message Probable Cause Table A-2System Error Messages Table A-3 System Error Messages Probable CauseTable A-4 Memory Error MessagesMemory Error Messages Message Probable CauseKeyboard Error Messages Table A-5 Keyboard Error Messages Probable CauseTable A-6 Printer Error Messages Probable Cause Printer Error MessagesVideo Graphics Error Messages Table A-7 Video Graphics Error Messages Probable CauseDiskette Drive Error Messages Table A-8 Diskette Drive Error Messages Probable CauseSerial Interface Error Messages Table A-9 Serial Interface Error Messages Probable CauseModem Communications Error Messages System Status Error Messages System Status Error MessagesTable A-11 Hard Drive Error Messages Table A-12 Hard Drive Error Messages Probable CauseXx = 03, Hard drive read/write compare test Table A-13 Hard Drive Error Messages Probable Cause Audio Error Messages Table A-14 Video Graphics Error Messages Probable CauseTable A-15 Audio Error Messages Probable Cause DVD/CD-ROM Error Messages 17 DVD/CD-ROM Error MessagesNetwork Interface Error Messages Table A-17 Network Interface Error Messages Probable CauseScsi Interface Error Messages 65xx-xx, 66xx-xx Table A-18 Scsi Interface Error MessagesPointing Device Interface Error Messages 8601-xx Error Messages and Codes Index NumericsIndex
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