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| 型号： | TLV320AIC22PT |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 消费家电 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP48 |
| 封装： | ROHS COMPLIANT, PLASTIC, LQFP-48 |
| 文件页数： | 47/55页 |
| 文件大小： | 782K |
| 代理商： | TLV320AIC22PT |
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TLV320AIC22
DUAL VOIP CODEC
SLAS281B – JULY 2000 – REVISED JUNE 2002
51
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
suggested configuration sequence (continued)
Other default settings include:
D Handset and headset input amplifier gains are set to 14 dB.
D Microphone input amplifier gain is set to 32 dB.
D Speaker output is powered down (muted).
D FSYNC is 8 kHz, MCLK = 24.576 MHz.
D LCD DAC output voltage is 1.5 V.
D Handset output is enabled, with echo gain set to –12 dB.
D Headset output is enabled, with echo gain set to –12 dB.
D Data-valid flag is enabled in ADC data.
D Line input, output and VCOM are enabled.
D Analog circuitry is powered up.
D Line amplifier has a filter pole at 64 kHz.
D Control information sent every frame
D Data-valid flag enabled for output data
If the default settings are not adequate, the user can reconfigure the registers settings. An example
configuration sequence after power has been applied to the TLV320AIC22 is:
1.
Wait 10
s after the RESET has been deasserted.
2.
Disable the analog outputs by programming the appropriate bits in registers 11, 13, and 14.
3.
Program control register 12 for the desired MCLK and FSYNC frequencies.
4.
Program control registers 1, 2, 6, and 7 to configure the I, N, and D values.
5.
Select the desired codec analog input and output paths by programming control registers 3 and 5 for codec
1 and registers 8 and 10 for codec 2. This configures the analog crosspoint.
6.
Program control registers 15 (for codec 1) and 16 (for codec 2) to select the conversion mode (A-law/
-law/linear), the number of LSBs for the zero crossing (if enabled), and the ADC IIR filter enable/bypass.
7.
Program the analog input and output gains in registers 3 and 4 for codec 1, and registers 8 and 9 for codec 2.
8.
Program the handset, headset, and microphone gains (if required) in registers 11, 13, and 14.
9.
Change the LCD DAC voltage (if required) by programming register 12.
10. Program how often the control information is sent via the serial interface in control register 17, if control
words are not required every frame.
11. Enable the analog outputs by programming registers 11, 13, and 14.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TLV320AIC22PTR | 功能描述:接口—CODEC DUAL VOIP CODEC RoHS:否 制造商:Texas Instruments 类型: 分辨率: 转换速率:48 kSPs 接口类型:I2C ADC 数量:2 DAC 数量:4 工作电源电压:1.8 V, 2.1 V, 2.3 V to 5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:DSBGA-81 封装:Reel |
| TLV320AIC23 | 制造商:TI 制造商全称:Texas Instruments 功能描述:STereo Audio CODEC, 8- to 96kHz, With Integrated Headphone Amplifier |
| TLV320AIC23_06 | 制造商:TI 制造商全称:Texas Instruments 功能描述:Stereo Audio CODEC, 8-to 96-kHz, With Integrated Headphone Amplifier |
| TLV320AIC23B | 制造商:TI 制造商全称:Texas Instruments 功能描述:Stereo Audio CODEC, 8-to 96-kHz, With Integrated Headphone Amplifier |
| TLV320AIC23B_06 | 制造商:TI 制造商全称:Texas Instruments 功能描述:Stereo Audio CODEC, 8-to 96-kHz, With Integrated Headphone Amplifier |
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