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參數(shù)資料
| 型號： | TLC320AD90C |
| 廠商： | Texas Instruments, Inc. |
| 元件分類： | Codec |
| 英文描述： | Stereo Audio Codec(立體聲音頻編碼譯碼器) |
| 中文描述： | 立體聲音頻編解碼器（立體聲音頻編碼譯碼器） |
| 文件頁數(shù)： | 47/51頁 |
| 文件大?。?/td> | 219K |
| 代理商： | TLC320AD90C |
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5–1
5 Application Information/System Usage
The system diagram in Figure 5–1 shows the essential components in the design of a system using the
TLC320AD90C. In this scenario, the TLC320AD90C operates at the fixed sample rate of 48 kHz and
performs digital-to-analog conversion, analog-to-digital conversion, analog input, mixing, and allows for the
insertion of analog and digital signal processing (3D sound, stereo enhancement, etc).
Digital Controller
Sample Rate Conversion
Sound Blaster Registers
Synthesis
AC-3
DirectX
etc.
PCI
BUS
AC-Link
AD90 Codec
Analog I/O
ADC
DAC
Analog Mixer
Digital Interface
Analog Output
Game Port
Volume Up/Down
Mute
Analog Inputs
Figure 5–1. System Diagram
The digital controller, generally connected to the PCI bus, performs the following functions:
Sample rate conversion to and from 48 kHz
Sound Blaster compatibility
FM synthesis
Wave table synthesis
Direct Sound acceleration (optional)
AC-3 decode
The digital link is an AC‘97 compatible bidirectional, 5-wire, serial TDM format interface designed for a
dedicated point-to-point interconnect on a circuit board.
5.1
Software Driver Support for the Texas Instruments TLC320AD90C Stereo
Codec
The TLC320AD90C codec is compatible with software drivers developed to conform to the AC‘97 audio
codec specification.
With the use of an AC‘97 compliant digital controller, the TLC320AD90C can perform high quality (90-dB
SNR) sample rate conversions on a minimum of four simultaneous channels (stereo in and stereo out) and
between a variety of sample rates. With the input sample rate at 48 kHz, data conversion to 8, 11.025, 16,
22.05, 32, and 44.1 kHz are possible.
Mono PCM always translates to two mono channels (L and R) on the AC‘97 AC-Link.
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