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參數(shù)資料
| 型號(hào)： | PCM1796DBR |
| 元件分類： | DAC |
| 英文描述： | 24BIT 192 KHZ SAMPLING ADVANCED SEGMENT AUDIO STEREO DIGITAL TO ANALOG CONVERTER |
| 中文描述： | 24位192千赫采樣高級(jí)分段音頻立體聲數(shù)模轉(zhuǎn)換器 |
| 文件頁數(shù)： | 47/57頁 |
| 文件大?。?/td> | 512K |
| 代理商： | PCM1796DBR |
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SLES100 DECEMBER 2003
www.ti.com
47
Device ID Determination
The TDMCA mode also supports a multichip implementation in one system. This means a host controller (DSP) can
simultaneously support several TDMCA devices, which can be of the same type or different types, including PCM
devices. The PCM devices are categorized as IN device, OUT device, IN/OUT device, and NO device. The IN device
has an input port to receive audio data, the OUT device has an output port to supply audio data, the IN/OUT device
has both input and output ports for audio data, and the NO device has no port for audio data but needs command
data from the host. A DAC is an IN device, an ADC is an OUT device, a codec is an IN/OUT device, and a PLL is
a NO device. The PCM1796 is an IN device. For the host controller to distinguish the devices, each device is assigned
its own device ID by the daisy chain. The devices obtain their own device IDs automatically by connecting their DCI
to the DCO of the preceding device and their DCO to the DCI of the following device in the daisy chain. The daisy
chains are categorized as the IN chain and the OUT chain, which are completely independent and equivalent.
Figure 54 shows an example daisy chain connection. If a system needs to chain the PCM1796 and a NO device in
the same IN or OUT chain, the NO device must be chained at the back end of the chain because it does not require
any audio data. Figure 55 shows an example of TDMCA system including an IN chain and an OUT chain with a TI
DSP. For a device to get its own device ID, the DID signal must be set to 1 (see the
Command Field
section for details),
and LRCK and BCK must be driven in the TDMCA mode for all PCM devices that are chained. The device at the top
of the chain knows its device ID is 1 because its DCI is fixed HIGH. Other devices count the BCK pulses and observe
their own DCI signal to determine their position and ID. Figure 56 shows the initialization of each device ID.
IN Device
D
D
OUT Device
D
D
IN
OUT
IN/OUT
Device
IN Chain
OUT Chain
IN Device
OUT Device
D
D
D
D
D
D
D
D
IN
OUT
D
D
D
D
NO Device
D
D
NO Device
D
D
NO Device
NO Device
D
D
D
D
IN/OUT
Device
Figure 54. Daisy Chain Connection
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PCM1796DBRG4 | 功能描述:音頻數(shù)/模轉(zhuǎn)換器 IC 24 bit 192kHz Stereo Audio DAC RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換器數(shù)量: 分辨率:16 bit 接口類型:I2S, UBS 轉(zhuǎn)換速率: 信噪比:98 dB 工作電源電壓:5 V DAC 輸出端數(shù)量:2 工作溫度范圍:- 25 C to + 85 C 電源電流:23 mA 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-32 封裝:Reel |
| PCM1798 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:24-BIT, 192-KHZ SAMPLING ADVANCED SEGMENT, AUDIO STEREO DIGITAL TO ANALOG CONVERTER |
| PCM1798DB | 功能描述:音頻數(shù)/模轉(zhuǎn)換器 IC PCM1798 24-Bit 192kHz Audio DAC RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換器數(shù)量: 分辨率:16 bit 接口類型:I2S, UBS 轉(zhuǎn)換速率: 信噪比:98 dB 工作電源電壓:5 V DAC 輸出端數(shù)量:2 工作溫度范圍:- 25 C to + 85 C 電源電流:23 mA 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-32 封裝:Reel |
| PCM1798DB | 制造商:Texas Instruments 功能描述:D/A CONVERTER (D-A) IC |
| PCM1798DBG4 | 功能描述:音頻數(shù)/模轉(zhuǎn)換器 IC PCM1798 24-Bit 192kHz Audio DAC RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換器數(shù)量: 分辨率:16 bit 接口類型:I2S, UBS 轉(zhuǎn)換速率: 信噪比:98 dB 工作電源電壓:5 V DAC 輸出端數(shù)量:2 工作溫度范圍:- 25 C to + 85 C 電源電流:23 mA 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-32 封裝:Reel |
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