STAC9202D3TAEYY IDT [Integrated Device Technology], STAC9202D3TAEYY Datasheet - Page 16

• Manufacturer Part Number: STAC9202D3TAEYY
• Description: 2-CHANNEL HIGH DEFINITION AUDIO CODEC WITH
• Manufacturer: IDT [Integrated Device Technology]

3. DETAILED DESCRIPTION
IDT™
STAC9202
2-CHANNEL HIGH DEFINITION AUDIO CODEC WITH DUAL DIGITAL MICROPHONE INTERFACES
3.1.
3.2.
3.3.
3.4.
3.5.
2-CHANNEL HIGH DEFINITION AUDIO CODEC WITH DUAL DIGITAL MICROPHONE INTERFACES
SPDIF Input
SPDIF Output
Digital Microphone Support
Mono Out
Headphone Drivers Restrictions
SPDIF_IN can operate at 44.1 KHz, 48 KHz or 96 KHz and implements internal Jack Sensing. A
sophisticated digital PLL allows automatic rate detection and accurate data recovery. The ability to
accept consumer SPDIF voltage levels directly eliminates the need for costly external receiver ICs.
Advanced features such as record slot select and SPDIF_IN routing to the DAC allows for simulta-
neous record and play.
SPDIF_OUT can operate at 44.1 KHz, 48 KHz, 88.2 KHz and 96 KHz as defined in the Intel High
Definition Audio Specification with resolutions up to 24 bits. This insures compatibility with all con-
sumer audio gear and allows for convenient integration into home theater systems and media center
PCs.
The STAC9202 has a three-pin digital microphone interface that accepts high-rate, single-bit data
streams from two digital microphones. Each microphone requires only one data line, and both micro-
phones share a single clock line. This robust digital interface gives designers the flexibility to place
the microphones in the optimum physical location on a system (such as along the top of the screen
bezel) and use a simple, 3-wire ribbon cable to directly connect the microphones to the STAC9202
CODEC.
The MONO Output is connected to pin 37 and has independent volume and mute control (see the
Widget listing for details). The MONO Output derives its input from the output of the summing node
that drives PORT A and PORT D. The following analog signals feed the summing amplifier that
feeds the MONO Out summing amplifier:
•
•
•
The signals of the stereo channels from the DAC are combined into a single analog signal with a
-6dB degradation in signal strength.
It is not recommended that users operate both Port A and Port D as headphone drivers simulta-
neously. The operation of the two ports as headphone drivers degrades the signal quality of both
outputs.
Note: 1) Headphone capabilities are on Port A (pins 39/41) and Port D (pins 35/36). Do NOT put
headphone loads on both sets of pins at the same time.
DAC Output: When enabled, both DAC Outputs are summed together.
Analog PC BEEP: Source from Pin 12
ADC Input: Stereo analog feed into the stereo ADC input.
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IDT CONFIDENTIAL
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STAC9202
PC AUDIO
V 1.1 102606