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參數(shù)資料
| 型號(hào)： | LM4550 |
| 廠商： | National Semiconductor Corporation |
| 元件分類： | Codec |
| 英文描述： | AC ’97 Rev 2.1 Multi-Channel Audio Codec with Stereo Headphone Amplifier, Sample Rate Conversion and National 3D Sound |
| 中文描述： | 交流\u0026#39;97活2.1多聲道音頻編解碼器的立體聲耳機(jī)放大器，采樣率轉(zhuǎn)換和國家3D聲音 |
| 文件頁數(shù)： | 16/25頁 |
| 文件大?。?/td> | 507K |
| 代理商： | LM4550 |
Application Information
AC Link Serial Interface Protocol
AC Link Output Frame: SDATA_OUT (output from
controller, input to LM4550)
The audio output frame (output from AC ’97 Controller)
contains control and PCM data targeted for the LM4550
control registers and stereo DAC. The Tag slot, slot 0, con-
tains 16 bits that tell the AC Link interface circuitry on the
LM4550 the validity of the following data slots.
A new audio output frame is signaled with a low to high
transition of SYNC. SYNC is synchronous to the rising edge
of BIT_CLK. On the next rising edge of BIT_CLK, the AC ’97
Controller drives SDATA_OUT with the first bit of slot 0. The
LM4550 samples SDATA_OUT on the falling edge of BIT-
_CLK. The AC ’97 Controller will continue outputting the
SDATA_OUT stream on each successive rising edge of
BIT_CLK.
SDATA_OUT Slot 0: Tag Phase
The first bit of slot 0 is designated the "Valid Frame" bit. If this
bit is 1, it indicates that the current data frame contains at
least one slot of valid data and the LM4550 will further
sample the next four bits and slots 7 & 8 and 6 & 9 to
determine which frames do in fact have valid data. Valid slots
are signified by a 1 in their respective slot bit position.
10097204
FIGURE 3. AC 97 Bidirectional Audio Frame
10097206
FIGURE 4. AC Link Audio Output Frame
10097205
FIGURE 5. Start of Audio Output Frame
L
www.national.com
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM4550B | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:AC 97 Rev 2.1 Multi-Channel Audio Codec with Stereo Headphone Amplifier, Sample Rate Conversion and National 3D Sound |
| LM4550BVH | 功能描述:接口—CODEC RoHS:否 制造商:Texas Instruments 類型: 分辨率: 轉(zhuǎn)換速率:48 kSPs 接口類型:I2C ADC 數(shù)量:2 DAC 數(shù)量:4 工作電源電壓:1.8 V, 2.1 V, 2.3 V to 5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:DSBGA-81 封裝:Reel |
| LM4550BVH/NOPB | 功能描述:接口—CODEC RoHS:否 制造商:Texas Instruments 類型: 分辨率: 轉(zhuǎn)換速率:48 kSPs 接口類型:I2C ADC 數(shù)量:2 DAC 數(shù)量:4 工作電源電壓:1.8 V, 2.1 V, 2.3 V to 5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:DSBGA-81 封裝:Reel |
| LM4550BVH/NOPB | 制造商:Texas Instruments 功能描述:Audio Codec IC |
| LM4550BVHX | 功能描述:接口—CODEC RoHS:否 制造商:Texas Instruments 類型: 分辨率: 轉(zhuǎn)換速率:48 kSPs 接口類型:I2C ADC 數(shù)量:2 DAC 數(shù)量:4 工作電源電壓:1.8 V, 2.1 V, 2.3 V to 5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:DSBGA-81 封裝:Reel |
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