Cooling for d325 Models | HP D315 guide

Technical Reference Guide

4.7.4.2Cooling for d325 Models

The fan control logic on the d325 model differs from the D315 system in that fans are controlled by the system board logic. The fans are driven by a constant positive 12 volts on one side and a negative voltage that is variable through the Fan Cntrl logic. A Hardware Monitor ASIC monitors the temperature of the processor and changes the duty cycle of the Fan PWM to increase or decrease fan speed based on the processor temperature. The Fan Clamp signal is initiated by the BIOS and produced by the GPIO at boot time to ensure that the fans start at boot time.

NOTE: A protection mechanism is provided where the processor threshold temperature programmed into the Hardware Monitor ASIC is temporarily set by the BIOS to a lower than normal level during the initial start up to protect against the possibility of an incorrectly installed heat sink. If during the boot period the processor’s temperature reaches 100° C the hardware Monitor will assert the Therm signal causing the I/O Controller to de-assert the PS On signal, which will shut down the power supply. If the processor does not reach 100° C during the boot sequence the BIOS then re-sets the thermal threshold to the run-time level of 125° C

LPC47B367

I/O

Controller

Therm

Hardware

Monitor

ASIC

	+12 VDC		CPU Fan		+12 VDC	Chassis Fan
			Header P70			Header P8
			(-)	1		(-)	1
			(+)	1		(+)	1
CPU			(+)	2		(+)	2
CPU			Sense	2		Sense	2
Fan Tach	Tach Logic		Sense	3	Tach Logic	Sense	3
Chassis	Tach Logic			3	Tach Logic		3
Chassis
Fan Tach
PS On
				Header	Power Supply Assembly
				P16	Power Supply Assembly
Fan				P16	Fan Sink
Fan				1	Fan Sink		PS Fan
Clamp				1
Clamp	Fan	Fan			Speed
	Fan	Fan		2	Speed		(-)
Fan PWM	Cntrl	C		2	Control
			ATX Power			+5 VDC (+)
			ATX Power
				P1	PS On	PS
				14	PS On	PS
				14	Circuits
Processor

Figure 4-13.d325 Model Fan Control Functional Block Diagram

Compaq D315 and hp d325 Personal Computers4-29

Featuring the AMD Athlon XP Processor

Second Edition - April 2003

Image 79

HP D315 manual Cooling for d325 Models, 13.d325 Model Fan Control Functional Block Diagram

Contents

Compaq D315 and hp d325 Personal Computers Technical reference guidePage Compaq D315 and hp d325 Personal Computers Page Featuring the AMD Athlon XP Processor Second Edition -- April Table of Contents PROCESSOR/MEMORY Subsystem INPUT/OUTPUT Interfaces Intregrated Graphics Subsystem Appendix B Ascii Character SET Technical Reference Guide List of Figures Figure C-1. Keystroke Processing ELEMENTS, Block Diagram List of Tables Technical Reference Guide Online Viewing About this GuideHardcopy XXX/XNN/NN/N/NNNx Additional Information SourcesModel Numbering Convention Compaq Model Numbering Convention DNNNsm/A2.06/NNNb+nyr/NNNX/XX1tNL Hp Model Numbering ConventionSerial Number Notational Conventions BIT Notation and Byte Values ValuesRanges Register Notation and Usage Acronyms and Abbreviations Common Acronyms and AbbreviationsAcronym/Abbreviation Description DDR DACDCH DDC ISA INTIPL IRQ Post PFCPIN PIO TFT TADTafi TCP This page is intentionally blank Compaq D315 Hp d325 Introduction Feature Compaq D315 Hp d325 Features and OptionsStandard Features Feature Difference Matrix Options Cabinet Layouts Mechanical DesignFront Views Shows the rear view of the Compaq D315 and HP d325 systems Rear Views Back Chassis LayoutFront D315 D325 Board Layouts Architectural Difference Matrix System Architecture DDR Sdram Bios ROMFSB AGP I/F Heat Sink, Processor, and Socket Assemblies AMD Athlon XP Processor Support Component Functions ChipsetSupport Components NVidia Chipset Comparison Universal Serial BUS Interface System MemoryMass Storage Serial and Parallel Interfaces D315 D325 Network Interface ControllerGraphics Subsystem Standard Graphics Support Comparison Audio Subsystem SpecificationsEnvironmental Specifications Factory Configuration Electrical Specifications Parameter Physical SpecificationsDiskette Drive Specifications Compaq SP# CD-R, CD-RW Optical Drive SpecificationsHard Drive Specifications Parameter 48x CD-ROM 16/10/40x CD-RW Drive AGP HT I/F FSB I/F GPUXMM1 XMM2 Dimm Processor Overview Athlon XP Processor CPU FPU Athlon XP Type Core Speed Voltage Max. Current Max. PowerFPU FSB Processor Upgrading D315 Memory Subsystem Byte Description SPD Address Map Sdram DimmDimm ID Shows the system memory map This page is intentionally blank System Support PCI Bus Devices and Functions PCI BUS Overview PCI BUS Transactions Configuration Cycles1.1 I/O and Memory Cycles PCI Component Function PCI Component Configuration AccessDevice # Function # Bist PCI Configuration Space Type PCI Bus Mastering Devices PCI BUS Master ArbitrationREQ/GNT Line Device PCI SUB-BUSSES PCI Power Management SupportOption ROM Mapping PCI Interrupts PCI Bus Connector Pinout PCI ConnectorPin Signal BUS Transactions AGP BUS Overview Data Transfers Data RequestCLK D1A D1B D2A D2B GNT Trdy GNT Trdy CLK D1A D1B D2A D2B D3A D3B D4A D4B CLK D1A D1B D2A D2B D3A D3B D4A D4B Adstbs Adstbf Trdy AGP 8X Transfers VDD AGP ConnectorAGP Bus Connector Pinout Ovrcnt GND VDD3 Intr System ResourcesInterrupts Maskable Interrupts Maskable Interrupt Priorities and Assignments Apic ModePriority Signal Label Source Typical Mode Port Register Non-Maskable InterruptsNMI- Generation Maskable Interrupt Control Registers IOCHK- NMI SMI- Generation Default DMA Channel Assignments Direct Memory AccessDMA Channel Device ID DMA Page Register Addresses DMA Page RegistersDMA Channel Register I/O Port DMA Controller Registers DMA Controller RegistersRegister Controller Clock Generation and Distribution System Clock DistributionFrequncy Source Destination or Function Clearing Cmos REAL-TIME Clock and Configuration Memory Location Function Cmos Archive and RestoreConfiguration Memory Cmos Map Standard Cmos Locations Security Functions Power-On PasswordSetup Password System Management 1.4 I/O Interface Security Cable Lock Provision Acpi Wake-Up Event System Wakes From Power ManagementSystem Boot/ROM Flash Status LED Indications System Status System Operational Status LED Indications Thermal Sensing and CoolingD315 D325 System Status Pwrfan Cooling for D315 ModelsTach FANSEL1 FANSEL2 Cooling for d325 Models 13.d325 Model Fan Control Functional Block Diagram Port Function Register MAP and Miscellaneous FunctionsSystem I/O MAP System I/O Map 2 LPC47B367 I/O Controller Functions Index Function Reset ValueLPC47B367 I/O Controller Control Registers Beeps System Status Power LED IDE Programming Enhanced IDE Interface IDE Bus Master Control Registers IDE Configuration RegistersIDE PCI Configuration Registers MCP, Device 9/Function IDE Bus Master Control Registers Pin Primary IDE Connector Pinout IDE ConnectorPin Signal Description Diskette Drive Interface Diskette Drive Programming Diskette Drive Interface ConfigurationDiskette Drive Interface Configuration Registers Index Reset Pri Diskette Drive Interface Control Registers Pin Diskette Drive Connector Pinout Diskette Drive Connector DB-9 Serial Connector Pinout Serial ConnectorSerial Interface Serial Interface Configuration Registers Serial Interface ConfigurationSerial Interface Programming Serial Interface Control Registers Serial Interface ControlAddr Register Parallel Interface Standard Parallel Port Mode Extended Capabilities Port Mode Enhanced Parallel Port Mode Parallel Interface Configuration Registers Parallel Interface ConfigurationParallel Interface Programming Parallel Interface Control Registers Parallel Interface ControlAddress Register DB-25 Parallel Connector Pinout Parallel Interface ConnectorPin Signal Function Keyboard Interface Operation KEYBOARD/POINTING Device Interface Command To-Keyboard Commands KEYBOARD/POINTING Device Interface Programming 3.1 8042 ConfigurationKeyboard Interface Configuration Registers Pointing Device Interface Operation Port 60h 3.2 8042 Control Value Command Description CPU Commands To Keyboard/Pointing Device Connector Pinout KEYBOARD/POINTING Device Interface ConnectorData MCP USB D315Difference Matrix CRC USB Data Formats USB Control USB ConfigurationUSB Interface Configuration Registers USB Programming USB Cable Length Data USB ConnectorUSB Connector Pinout USB Cable Data Functional Analysis TDA Front Panel AssemblyCD ROM SD OUT 2 AC97 Audio Controller3 AC97 Link BUS Sync Audio Programming Audio Codec Audio Control Audio ConfigurationAC’97 Audio Codec Control Registers AC97 Audio Subsystem Specifications Audio Specifications TX/RX LAN PHY I/F Event Description Wake on LAN SupportAlert on LAN Support AOL Events APM Environment Power Management SupportAcpi Environment NIC Control Registers ConfigurationNIC Programming Control MS-DOS NIC ConnectorNIC Specifications NIC Specifications Integrated Graphics Subsystem Functional Description DAC a Feature D315 D325Difference Matrix RGB IGP Display Modes Resolution Bits per pixel Color DepthGPU Graphics Display Modes Addr Register Value Config ResetProgramming Upgrading IGP-BASED Graphics SDA VGA Monitor ConnectorDB-15 Monitor Connector Pinout PWR AUX Power Supply ASSEMBLY/CONTROL Watt Power Supply Assembly Specifications Power Supply AssemblyRange Min. Current Max Surge Power Button Power ControlSystem State Pressed Power Button Results Wake-On-LAN Wake Up Events Power Transition OS Restart State System Condition System Power States RTN POK Power Distribution1 3.3/5/12 VDC Distribution Conn Pin Shows the power supply cabling for the d325 model VID LOW Voltage PRODUCTION/DISTRIBUTION System Signal DistributionBoard CD ROM Audio CD1Header Power Button/LED FP HeaderFront Panel Audio Audio 1 Header Front Panel USB USB 4/5 Header System Bios Meaning Boot Block CodesROM FLASHING/UPGRADING Num Lock Cap Lock Scroll Lock Boot Device Order Boot FunctionsNetwork Boot F12 Support Visual Audible Meaning Memory Detection and ConfigurationBoot Error Codes Boot Error Codes Setup Utility Functions Setup UtilityHeading Option Description Multisector Transfers IDE ATA devices on ly Translation Mode IDE disks onlyRemovable Media Boot Translation Parameters IDE Disks only CTRL+ALT+DEL Heading Option Description Setup Utility Functions Setup Utility Functions Setup Utility Functions Client Management Functions Function ModeClient Management Functions INT15 ECX Input EAXOutput EBX Edid Retrieve System ID and ROM TypeSystem System ID ROM Family PnP ID Independent PM Support D315 only Temperature StatusDrive Fault Prediction Power Management Functions System Standby System TimerIDE Hard Drive Timer Going to Sleep in Independent PM Acpi Support SuspendSystem OFF Waking Up in Independent PM Table A-1 BEEP/KEYBOARD LED CodesBeep/Keyboard LED Codes Power-On Self Test Post Messages POWER-ON Self Test Post MessagesTable A-2 System Error Messages System Error MessagesTable A-3 Table A-5 Memory Error MessagesKeyboard Error Messages Table A-4 Table A-7 Printer Error MessagesVideo Graphics Error Messages Table A-6 Table A-9 Diskette Drive Error MessagesSerial Interface Error Messages Table A-8 Table A-10 Modem Communications Error Messages Table A-12 System Status Error MessagesHard Drive Error Messages Table A-11 Table A-14 Table A-13 17 DVD/CD-ROM Error Messages Audio Error MessagesNetwork Interface Error Messages Table A-19 Scsi Interface Error Messages 65xx-xx, 66xx-xxPointing Device Interface Error Messages Table A-18 12hp/Compaq Personal Computers Ascii Character Set Table B-1 Table B-1.ASCII Code Set Dec Hex Symbol Keyboard Keystroke Processing Parameter 1 PS/2-TYPE Keyboard Transmissions USB-TYPE Keyboard Transmissions Standard Enhanced Keyboards Keyboard Layouts Figure C-6.National Windows 102W-Key Keyboard Key Positions Windows Enhanced Keyboards Figure C-8.8-Button Easy Access Keyboard Layout Easy Access Keyboards Special Single-Keystroke Functions Keys Windows Keystrokes Multi-Keystroke Functions Button Easy Access Keyboard Easy Access Keystrokes Table C-1 Keyboard CommandsKeyboard-to-System Commands Scan Codes Keyboard Scan Codes Table C-2 Table C-2. Keyboard Scan Codes 14hp/Compaq Personal Computers Table C-2. Keyboard Scan Codes Figure C-9.PS/2 Keyboard Cable Connector Male Connectors Network Interface Controller Adapters Controller Type Featured on Wake UP Functions AOL Function Ipsec Function Acpi Environment APM Environment Table D-1 ConfigurationAdapter Programming Control Table D-3 Network ConnectorAdapter Specifications Adapter Specifications 8hp/Compaq Personal Computers Dimm support Index Physical SpecificationsDiskette Drive