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參數(shù)資料
| 型號(hào)： | PCM2904 |
| 元件分類： | Codec |
| 英文描述： | STEREO AUDIO CODEC WITH USB INTERFACE SINGLE ENEDE ANALOG INPUT/OUTPUT AND S/PDIF |
| 中文描述： | 立體聲音頻編解碼器帶USB接口的單ENEDE模擬輸入/輸出和S / PDIF |
| 文件頁數(shù)： | 24/32頁 |
| 文件大?。?/td> | 299K |
| 代理商： | PCM2904 |
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SLES042A JUNE 2002 REVISED JUNE 2004
www.ti.com
24
INTERFACE SEQUENCE
Power-On, Attach, and Playback Sequence
The PCM2904/2906 is ready for setup when the reset sequence has finished and the USB device is attached.
After a connection has been established by setup, the PCM2904/PCM2906 is ready to accept USB audio data.
While waiting for the audio data (idle state), the analog output is set to bipolar zero (BPZ).
When receiving the audio data, the PCM2904/2906 stores the first audio packet, which contained 1-ms audio
data, into the internal storage buffer. The PCM2904/2906 starts playing the audio data when detecting the
following start-of-frame (SOF) packet.
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D+/D
2.5 V (Typ)
0 V
Internal Reset
Ready for Setup
óó
óó
óó
óó
óó
óó
SOF
ó
ó
ó
óóó
óóó
óóó
óó
óó
óó
Ready for Playback
óó
óó
óó
óó
óó
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Bus Reset
Set Configuration
SOF
óóóó
óóóó
óóóó
BPZ
Bus Idle
5.0 V
(Typ)
1st Audio Data
2nd Audio Data
VBUS (Pin 3)
SSPND
VOUTL
VOUTR
700
μ
s
Device Setup
1 ms
Figure 32. Initial Sequence
Play, Stop, and Detach Sequence
When the host finishes or aborts the playback, the PCM2904/2906 stops playing after the last audio data has
played.
Record Sequence
The PCM2904/2906 starts audio capture into the internal memory after receiving the SET_INTERFACE
command.
Suspend and Resume Sequence
The PCM2904/2906 enters the suspend state after a constant idle state on the USB bus, approximately 5 ms.
While the PCM2904/2906 enters the suspend state, the SSPND flag (pin 28) is asserted. The PCM2904/2906
wakes up immediately on detecting a non-idle state on the USB.
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PDF描述 |
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| PCM2904DB | STEREO AUDIO CODEC WITH USB INTERFACE SINGLE ENEDE ANALOG INPUT/OUTPUT AND S/PDIF |
| PCM2904DBR | STEREO AUDIO CODEC WITH USB INTERFACE SINGLE ENEDE ANALOG INPUT/OUTPUT AND S/PDIF |
| PCM2906 | STEREO AUDIO CODEC WITH USB INTERFACE SINGLE ENEDE ANALOG INPUT/OUTPUT AND S/PDIF |
| PCM2906DB | STEREO AUDIO CODEC WITH USB INTERFACE SINGLE ENEDE ANALOG INPUT/OUTPUT AND S/PDIF |
| PCM2906DBR | STEREO AUDIO CODEC WITH USB INTERFACE SINGLE ENEDE ANALOG INPUT/OUTPUT AND S/PDIF |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PCM2904A1DB | 制造商:Texas Instruments 功能描述: |
| PCM2904A1DBR | 制造商:Texas Instruments 功能描述: |
| PCM2904DB | 功能描述:接口—CODEC Ster Codec w/USB Ifc Sngl-end I/O 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 |
| PCM2904DBG4 | 功能描述:接口—CODEC Ster Codec w/USB Ifc Sngl-end I/O 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 |
| PCM2904DBR | 功能描述:接口—CODEC Ster Codec w/USB Ifc Sngl-end I/O 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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