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4-CHANNEL HD AUDIO CODEC WITH QUAD DIGITAL MICROPHONE INTERFACE Description
The STAC9204/9205 are high fidelity, 4-channel HD Audio CODECs that enable 2.0 Audio with simultaneous Real-Time Communication such as VoIP, conferencing, voice command and control, etc. Up to four digital microphones are supported, enabling high quality voice input for increased usability of voice applications.
STAC9204/9205
• Optimized and flexible power management • 48-pin LQFP and 48-pad QFN environmental package
Software Support
• SKPI (Kernel Processing Interface)
• Enables plug-ins that can operate globally on all audio streams of the system
Features
• High performance SD technology
• 103dB DAC SNR • 90dB ADC SNR
• 12 band 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
• Two stereo DACs and two stereo ADCs
• Supports 2.0 Audio with simultaneous Real-Time Communication (RTC) channel such as VoIP or separate stereo audio stream • Provides mono output for laptop sub-woofer
• Dynamics Processing SKPI plug-in
• Enables improved voice articulation • Compressor/limiter allows higher average noise level without resonances
• 24-bit resolution with up to 192 KHz sample rates • Supports advanced chipsets with flexible 1.5 V to 3.3 V •
signaling Digital microphone interface
• Direct interface to up to four digital microphones
Third Party Partners
• Dolby PC Entertainment Experience Logo Program
• Dolby Home Theater™ (HT) • Dolby Sound Room™ (SR)
• Analog stereo microphone
• Microphone Boost 0, 10, 20, 30, 40dB • Five adjustable Vref outputs for microphone bias
• Dolby Technologies
• Dolby Headphone™, Dolby Virtual Speaker™ • Dolby ProLogic II™, Dolby ProLogic IIx™ • Dolby Digital Live™ (DDL)
• • • • •
Universal Jacks™ functionality for jack retasking S/PDIF In and Out Two-pin volume up/down control Digital PC Beep to all outputs +3.3 V, +4 V, +4.5 V and +5 V analog power supply options
• Intel Audio Studio™ from Sonic Focus • Maxx Player™ from Waves • Microphone Beam Forming, Acoustic Echo Cancellation,
and Noise Suppression from Knowles™
Block Diagram
High Definition Interface
DSP
SPDIF
Ports
X
Port A Port B Port C Port D Port E Port F SPDIF In/Out
IDT™
1
STAC9204/9205
V 1.0 12/06
4-CHANNEL HD AUDIO CODEC WITH QUAD DIGITAL MICROPHONE INTERFACE
STAC9204/9205 4-CHANNEL HD AUDIO CODEC WITH QUAD DIGITAL MICROPHONE INTERFACE
PC AUDIO
TABLE OF CONTENTS
1. DESCRIPTION ......................................................................................................................... 13
1.1. Overview ......................................................................................................................................... 13 1.2. Block Diagram ................................................................................................................................. 14 1.3. Detailed Description ........................................................................................................................ 15 1.3.1. Low-voltage High Definition Audio Link Signaling ............................................................. 15 1.3.2. Digital Microphone Support ............................................................................................... 15 1.3.3. Volume/Digital Microphone/GPIO Selection ...................................................................... 20 1.3.4. VRefOut/GPIO Selection ................................................................................................... 20 1.3.5. SPDIF Input ....................................................................................................................... 20 1.3.6. SPDIF Output .................................................................................................................... 20 1.3.7. Mono Output ...................................................................................................................... 21 1.3.8. Universal Jacks™ .............................................................................................................. 21 1.3.9. Power Management .......................................................................................................... 23 1.3.10. Analog PC-Beep .............................................................................................................. 23 1.3.11. Headphone Drivers .......................................................................................................... 23 1.3.12. Device IDs ....................................................................................................................... 24
2. CHARACTERISTICS ..................................................................................................