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DATASHEET
4-CHANNEL HD AUDIO CODEC OPTIMIZED FOR
LOW POWER
92HD71B8
Description
The 92HD71B8 codec is a low power optimized, high
fidelity, 4-channel audio codec compatible with Intel’s High
Definition (HD) Audio Interface. The 92HD71B8 codec
provides stereo 24-bit resolution with sample rates up to
192kHz. Dual SPDIF provides connectivity to consumer
electronic equipment that is WLP complaint. The
92HD71B8 provides high quality, HD Audio capability to
notebook and business desktop PC applications.
Features
• 4 Channels (2 stereo DACs and 2 stereo ADCs) with
24-bit resolution
• Supports full-duplex stereo audio and simultaneous VoIP
• Provides a mono output for laptop sub-woofer
• Microsoft WLP 3/4 premium logo compliant, as
defined in WLP 3.09
• Optimized and flexible power management with
pop/click mitigation
• 2 independent S/PDIF Output converters for WLP
compliant HDMI/SPDIF support.
• Support for 1.5V and 3.3V HDA signaling with
runtime selection
• Digital microphone input (mono, stereo, or quad
array)
• 3 Adjustable VREF Out pins for microphone bias
• High performance analog mixer option
• 6 analog ports
• Supports to 3 stereo microphone inputs
• Two-pin volume up/down control
• Digital PC Beep to all outputs
• Integrated headphone amp
• Jack insertion detection
• Sample rates up to 192kHz
• +3.3 V, +4 V, +4.75 V and +5 V analog power supply
options
• 48-pin QFP and 48-pad QFN RoHS packages
Preliminary Datasheet
Block Diagram
X
DUAL SPDIF
Port A
Port B
Port C
Port D
Port E
Port F
SPDIF Out 1
SPDIF Out 2
IDT™ CONFIDENTIAL AND PROPRIETARY
4-CHANNEL HD AUDIO CODEC OPTIMIZED FOR LOW POWER
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92HD71B8
V 0.91 09/07

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92HD71B8
4-CHANNEL HD AUDIO CODEC OPTIMIZED FOR LOW POWER
PC AUDIO
Software Support
• Intuitive graphical user interface that allows configurability and preference settings
• SKPI (Kernel Processing Interface)
• Enables plug-ins that can operate globally on all audio streams of the system
• 12 band fully parametric equalizer (SKPI plug-in)
• Constant, system-level effects tuned to optimize a particular platform can be combined with
user-mode “presets” tailored for specific acoustical environments and applications
• System-level effects automatically disabled when external audio connections made
• Dynamics Processing (SKPI plug-in)
• Enables improved voice articulation
• Compressor/limiter allows higher average noise level without resonances
• IDT Vista APO wrapper
• Enables multiple APOs to be used with the IDT Driver
• Microphone Beam Forming, Acoustic Echo Cancellation, and Noise Suppression
• Dynamic Stream Switching
• Improved multi-streaming user experience with less support calls
• Dolby PC Entertainment Experience Logo Program
• Dolby Home Theater™ (HT)
• Dolby Sound Room™ (SR)
• Dolby Technologies
• Dolby Headphone™, Dolby Virtual Speaker™
• Dolby ProLogic II™, Dolby ProLogic IIx™
• Dolby Digital Live™ (DDL)
• Maxx Player™ from Waves
• WOWTM and Tru SurroundTM from SRS
IDT™ CONFIDENTIAL AND PROPRIETARY
4-CHANNEL HD AUDIO CODEC OPTIMIZED FOR LOW POWER
2
92HD71B8
V 0.91 09/07

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92HD71B8
4-CHANNEL HD AUDIO CODEC OPTIMIZED FOR LOW POWER
PC AUDIO
TABLE OF CONTENTS
1. DESCRIPTION ........................................................................................................................ 10
1.1. Overview ..........................................................................................................................................10
1.2. Orderable Part numbers ..................................................................................................................11
1.3. Block Diagram .................................................................................................................................11
1.4. Detailed Description .........................................................................................................................12
1.4.1. Low-voltage High Definition Audio Link Signaling ..............................................................12
1.4.2. Port Functionality ...............................................................................................................12
1.4.3. Port Characteristics ............................................................................................................12
1.4.4. Jack Detect ........................................................................................................................13
1.4.5. SPDIF Output .....................................................................................................................13
1.4.6. Mono Output ......................................................................................................................14
1.4.7. Analog Mixer ......................................................................................................................15
1.4.8. Input Multiplexers ...............................................................................................................15
1.4.9. ADC Multiplexers ...............................................................................................................15
1.4.10. Power Management .........................................................................................................15
1.4.11. Multi-channel capture .......................................................................................................16
1.4.12. EAPD ...............................................................................................................................17
1.4.13. Digital Microphone Support ..............................................................................................18
1.4.14. Analog PC-Beep ..............................................................................................................23
1.4.15. Headphone Drivers ..........................................................................................................23
1.4.16. GPIO ................................................................................................................................23
1.4.17. External Volume Control ..................................................................................................24
2. CHARACTERISTICS ............................................................................................................... 26
2.1. Electrical Specifications ...................................................................................................................26
2.1.1. Absolute Maximum Ratings ...............................................................................................26
2.1.2. Recommended Operating Conditions ................................................................................26
2.2. 92HD71B8 5V, 4.75V, and 3.3V Analog Performance Characteristics (PRELIMINARY) ...............27
3. PORT CONFIGURATIONS ..................................................................................................... 32
4. FUNCTIONAL BLOCK DIAGRAM .......................................................................................... 33
5. WIDGET INFORMATION AND SUPPORTED COMMAND VERBS ....................................... 34
5.1. Widget List 92HD71B .....................................................................................................................35
6. PIN CONFIGURATION DEFAULT REGISTER SETTINGS .................................................... 36
7. WIDGET INFORMATION ........................................................................................................ 37
8. SUPPORTED VERBS AND COMMANDS .............................................................................. 38
8.1. Root Node (NID = 00) ......................................................................................................................38
8.1.1. Root VendorID ...................................................................................................................38
8.1.2. Root RevID ........................................................................................................................38
8.2. AFG Node (NID = 01 .......................................................................................................................39
8.2.1. AFG Reset .........................................................................................................................39
8.2.2. AFG NodeInfo ....................................................................................................................39
8.2.4. AFG AFGCap .....................................................................................................................40
8.2.3. AFG FGType ......................................................................................................................40
8.2.5. AFG PCMCap ....................................................................................................................41
8.2.6. AFG StreamCap ................................................................................................................42
8.2.7. AFG InAmpCap ..................................................................................................................43
8.2.8. AFG PwrStateCap .............................................................................................................43
8.2.10. AFG OutAmpCap .............................................................................................................44
8.2.9. AFG GPIOCnt ....................................................................................................................44
8.2.12. AFG UnsolResp ...............................................................................................................45
8.2.11. AFG PwrState ..................................................................................................................45
8.2.13. AFG GPIO ........................................................................................................................46
8.2.14. AFG GPIOEn ...................................................................................................................47
8.2.15. AFG GPIODir ...................................................................................................................48
IDT™ CONFIDENTIAL AND PROPRIETARY
4-CHANNEL HD AUDIO CODEC OPTIMIZED FOR LOW POWER
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92HD71B8
V 0.91 09/07