2 AC97 Audio Controller, 3 AC97 Link BUS, Sync, Sd Out | HP D315

Chapter 5 Input/Output Interfaces

5.8.2 AC97 AUDIO CONTROLLER

The AC97 Audio Controller is a PCI device (device 6/function 0) that is integrated into the MCP component and supports the following functions:

♦Read/write access to audio codec registers

♦16-bit stereo PCM output @ up to 48 KHz sampling

♦16-bit stereo PCM input @ up to 48 KHz sampling

♦Acoustic echo correction for microphone

♦AC’97 Link Bus

♦ACPI power management

5.8.3AC97 LINK BUS

The audio controller and the audio codec communicate over a five-signal AC97 Link Bus (Figure 5-11). The AC97 Link Bus includes two serial data lines (SD OUT/SD IN) that transfer control and PCM audio data serially to and from the audio codec using a time-division multiplexed (TDM) protocol. The data lines are qualified by a 12.288 MHz BIT_CLK signal driven by the audio codec. Data is transferred in frames synchronized by the 48-KHz SYNC signal, which is derived from the clock signal and driven by the audio controller. The SYNC signal is high during the frame’s tag phase then falls during T17 and remains low during the data phase. A frame consists of one 16-bit tag slot followed by twelve 20-bit data slots. When asserted (typically during a power cycle), the RESET- signal (not shown) will reset all audio registers to their default values.

T1

T2

T18

T19

T38

T39

T58

BIT_CLK (12.288 MHz)

SYNC
(48 KHz)
SD OUT	Codec	Bit 15 Bit 14	Bit 0	Bit 19 Bit 18	Bit 0	Bit 19 Bit 18	Bit 0 Bit 19
or SD IN	Ready
		Slot 0 (Tag)		Slot 1 (Data)		Slot 2 (Data)
Slot	Description

0Bit 15: Frame valid bit

Bits 14-3: Slots 1-12 valid bits

Bits 2-0: Codec ID

1Command address: Bit 19, R/W; Bits 18..12, reg. Index; Bits 11..0, reserved.

2Command data

3Bits 19-4: PCM audio data, left channel (SD OUT, playback; SD IN, record) Bits 3-0 all zeros

4Bits 19-4: PCM audio data, right channel (SD OUT, playback; SD IN, record) Bits 3-0 all zeros

5Modem codec data (not used in this system)

6-11	Reserved
12	I/O control

Figure 5-11.AC’97 Link Bus Protocol

5-28Compaq D315 and hp d325 Personal Computers Featuring the AMD Athlon XP Processor

Second Edition – April 2003

Image 110

HP D315 manual 2 AC97 Audio Controller, 3 AC97 Link BUS, Sync, Sd Out, Slot Description

Contents

Technical reference guide Compaq D315 and hp d325 Personal ComputersPage 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 Hardcopy About this GuideOnline Viewing Compaq Model Numbering Convention Additional Information SourcesModel Numbering Convention XXX/XNN/NN/N/NNNx Notational Conventions Hp Model Numbering ConventionSerial Number DNNNsm/A2.06/NNNb+nyr/NNNX/XX1tNL Register Notation and Usage ValuesRanges BIT Notation and Byte Values Acronym/Abbreviation Description Common Acronyms and AbbreviationsAcronyms and Abbreviations DDC DACDCH DDR IRQ INTIPL ISA PIO PFCPIN Post TCP TADTafi TFT This page is intentionally blank Introduction Compaq D315 Hp d325 Feature Difference Matrix Features and OptionsStandard Features Feature Compaq D315 Hp d325 Options Front Views Mechanical DesignCabinet Layouts Rear Views Shows the rear view of the Compaq D315 and HP d325 systems Front Chassis LayoutBack Board Layouts D315 D325 System Architecture Architectural Difference Matrix AGP I/F Bios ROMFSB DDR Sdram AMD Athlon XP Processor Heat Sink, Processor, and Socket Assemblies NVidia Chipset Comparison ChipsetSupport Components Support Component Functions Serial and Parallel Interfaces System MemoryMass Storage Universal Serial BUS Interface Standard Graphics Support Comparison Network Interface ControllerGraphics Subsystem D315 D325 Electrical Specifications SpecificationsEnvironmental Specifications Factory Configuration Audio Subsystem Compaq SP# Physical SpecificationsDiskette Drive Specifications Parameter Parameter 48x CD-ROM 16/10/40x CD-RW Drive Optical Drive SpecificationsHard Drive Specifications CD-R, CD-RW XMM1 XMM2 Dimm FSB I/F GPUAGP HT I/F Athlon XP Processor Processor Overview FPU FSB Athlon XP Type Core Speed Voltage Max. Current Max. PowerCPU FPU Processor Upgrading Memory Subsystem D315 Dimm ID SPD Address Map Sdram DimmByte Description Shows the system memory map This page is intentionally blank System Support PCI BUS Overview PCI Bus Devices and Functions 1.1 I/O and Memory Cycles Configuration CyclesPCI BUS Transactions Device # Function # PCI Component Configuration AccessPCI Component Function PCI Configuration Space Type Bist REQ/GNT Line Device PCI BUS Master ArbitrationPCI Bus Mastering Devices PCI Interrupts PCI Power Management SupportOption ROM Mapping PCI SUB-BUSSES Pin Signal PCI ConnectorPCI Bus Connector Pinout AGP BUS Overview BUS Transactions CLK D1A D1B D2A D2B GNT Trdy Data RequestData Transfers CLK D1A D1B D2A D2B D3A D3B D4A D4B GNT Trdy AGP 8X Transfers CLK D1A D1B D2A D2B D3A D3B D4A D4B Adstbs Adstbf Trdy Ovrcnt GND VDD3 AGP ConnectorAGP Bus Connector Pinout VDD Maskable Interrupts System ResourcesInterrupts Intr Mode Apic ModePriority Signal Label Source Typical Maskable Interrupt Priorities and Assignments Maskable Interrupt Control Registers Non-Maskable InterruptsNMI- Generation Port Register SMI- Generation IOCHK- NMI DMA Channel Device ID Direct Memory AccessDefault DMA Channel Assignments DMA Channel Register I/O Port DMA Page RegistersDMA Page Register Addresses Register Controller DMA Controller RegistersDMA Controller Registers Frequncy Source Destination or Function System Clock DistributionClock Generation and Distribution REAL-TIME Clock and Configuration Memory Clearing Cmos Standard Cmos Locations Cmos Archive and RestoreConfiguration Memory Cmos Map Location Function System Management Power-On PasswordSetup Password Security Functions Cable Lock Provision 1.4 I/O Interface Security System Status Power ManagementSystem Boot/ROM Flash Status LED Indications Acpi Wake-Up Event System Wakes From D315 D325 System Status Thermal Sensing and CoolingSystem Operational Status LED Indications FANSEL1 FANSEL2 Cooling for D315 ModelsTach Pwrfan 13.d325 Model Fan Control Functional Block Diagram Cooling for d325 Models System I/O Map Register MAP and Miscellaneous FunctionsSystem I/O MAP Port Function LPC47B367 I/O Controller Control Registers Index Function Reset Value2 LPC47B367 I/O Controller Functions System Status Power LED Beeps Enhanced IDE Interface IDE Programming IDE Bus Master Control Registers IDE Configuration RegistersIDE PCI Configuration Registers MCP, Device 9/Function IDE Bus Master Control Registers Pin Signal Description IDE ConnectorPin Primary IDE Connector Pinout Diskette Drive Interface Index Reset Diskette Drive Interface ConfigurationDiskette Drive Interface Configuration Registers Diskette Drive Programming Diskette Drive Interface Control Registers Pri Diskette Drive Connector Pin Diskette Drive Connector Pinout Serial Interface Serial ConnectorDB-9 Serial Connector Pinout Serial Interface Programming Serial Interface ConfigurationSerial Interface Configuration Registers Addr Register Serial Interface ControlSerial Interface Control Registers Standard Parallel Port Mode Parallel Interface Enhanced Parallel Port Mode Extended Capabilities Port Mode Parallel Interface Programming Parallel Interface ConfigurationParallel Interface Configuration Registers Address Register Parallel Interface ControlParallel Interface Control Registers Pin Signal Function Parallel Interface ConnectorDB-25 Parallel Connector Pinout KEYBOARD/POINTING Device Interface Keyboard Interface Operation To-Keyboard Commands Command Pointing Device Interface Operation 3.1 8042 ConfigurationKeyboard Interface Configuration Registers KEYBOARD/POINTING Device Interface Programming 3.2 8042 Control Port 60h CPU Commands To Value Command Description Data KEYBOARD/POINTING Device Interface ConnectorKeyboard/Pointing Device Connector Pinout Difference Matrix D315MCP USB USB Data Formats CRC USB Programming USB ConfigurationUSB Interface Configuration Registers USB Control USB Cable Data USB ConnectorUSB Connector Pinout USB Cable Length Data Functional Analysis CD ROM Front Panel AssemblyTDA Sync 2 AC97 Audio Controller3 AC97 Link BUS SD OUT Audio Codec Audio Programming AC’97 Audio Codec Control Registers Audio ConfigurationAudio Control Audio Specifications AC97 Audio Subsystem Specifications TX/RX LAN PHY I/F AOL Events Wake on LAN SupportAlert on LAN Support Event Description Acpi Environment Power Management SupportAPM Environment Control ConfigurationNIC Programming NIC Control Registers NIC Specifications NIC ConnectorNIC Specifications MS-DOS Integrated Graphics Subsystem Functional Description RGB IGP Feature D315 D325Difference Matrix DAC a GPU Graphics Display Modes Resolution Bits per pixel Color DepthDisplay Modes Upgrading IGP-BASED Graphics Config ResetProgramming Addr Register Value PWR VGA Monitor ConnectorDB-15 Monitor Connector Pinout SDA Power Supply ASSEMBLY/CONTROL AUX Range Min. Current Max Surge Power Supply AssemblyWatt Power Supply Assembly Specifications System State Pressed Power Button Results Power ControlPower Button Wake Up Events Wake-On-LAN System Power States Power Transition OS Restart State System Condition Conn Pin Power Distribution1 3.3/5/12 VDC Distribution RTN POK Shows the power supply cabling for the d325 model LOW Voltage PRODUCTION/DISTRIBUTION VID Board Signal DistributionSystem Front Panel USB USB 4/5 Header Power Button/LED FP HeaderFront Panel Audio Audio 1 Header CD ROM Audio CD1Header System Bios Num Lock Cap Lock Scroll Lock Boot Block CodesROM FLASHING/UPGRADING Meaning Network Boot F12 Support Boot FunctionsBoot Device Order Boot Error Codes Memory Detection and ConfigurationBoot Error Codes Visual Audible Meaning Heading Option Description Setup UtilitySetup Utility Functions Translation Parameters IDE Disks only Translation Mode IDE disks onlyRemovable Media Boot Multisector Transfers IDE ATA devices on ly Heading Option Description CTRL+ALT+DEL Setup Utility Functions Setup Utility Functions Setup Utility Functions Client Management Functions INT15 Function ModeClient Management Functions EBX Input EAXOutput ECX System System ID ROM Family PnP ID System ID and ROM TypeEdid Retrieve Power Management Functions Temperature StatusDrive Fault Prediction Independent PM Support D315 only Going to Sleep in Independent PM System TimerIDE Hard Drive Timer System Standby Waking Up in Independent PM SuspendSystem OFF Acpi Support Beep/Keyboard LED Codes BEEP/KEYBOARD LED CodesTable A-1 Table A-2 POWER-ON Self Test Post MessagesPower-On Self Test Post Messages Table A-3 System Error MessagesSystem Error Messages Table A-4 Memory Error MessagesKeyboard Error Messages Table A-5 Table A-6 Printer Error MessagesVideo Graphics Error Messages Table A-7 Table A-8 Diskette Drive Error MessagesSerial Interface Error Messages Table A-9 Modem Communications Error Messages Table A-10 Table A-11 System Status Error MessagesHard Drive Error Messages Table A-12 Table A-13 Table A-14 Network Interface Error Messages Audio Error Messages17 DVD/CD-ROM Error Messages Table A-18 Scsi Interface Error Messages 65xx-xx, 66xx-xxPointing Device Interface Error Messages Table A-19 12hp/Compaq Personal Computers Table B-1 Ascii Character Set Dec Hex Symbol Table B-1.ASCII Code Set Keyboard Keystroke Processing 1 PS/2-TYPE Keyboard Transmissions Parameter USB-TYPE Keyboard Transmissions Keyboard Layouts Standard Enhanced Keyboards Windows Enhanced Keyboards Figure C-6.National Windows 102W-Key Keyboard Key Positions Easy Access Keyboards Figure C-8.8-Button Easy Access Keyboard Layout Keys Special Single-Keystroke Functions Multi-Keystroke Functions Windows Keystrokes Easy Access Keystrokes Button Easy Access Keyboard Scan Codes Keyboard CommandsKeyboard-to-System Commands Table C-1 Table C-2 Keyboard Scan Codes Table C-2. Keyboard Scan Codes 14hp/Compaq Personal Computers Table C-2. Keyboard Scan Codes Connectors Figure C-9.PS/2 Keyboard Cable Connector Male Network Interface Controller Adapters Controller Type Featured on AOL Function Wake UP Functions Ipsec Function APM Environment Acpi Environment Control ConfigurationAdapter Programming Table D-1 Adapter Specifications Network ConnectorAdapter Specifications Table D-3 8hp/Compaq Personal Computers Index Dimm support Diskette Drive SpecificationsPhysical