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參數資料
| 型號： | PCM2702E |
| 英文描述： | 16-Bit Stereo DIGITAL-TO-ANALOG CONVERTER with Interface |
| 中文描述： | 16位立體聲數字模擬轉換器的接口 |
| 文件頁數： | 8/11頁 |
| 文件大小： | 117K |
| 代理商： | PCM2702E |
8
PCM2702
THEORY OF OPERATION
USB INTERFACE
The description of the USB interface complies with Univer-
sal Serial Bus specification Rev. 1.0.
Control and audio data are both transferred to the PCM2702
via D+ (pin 6) and D– (pin 7). All data to/from the PCM2702
are transferred at full-speed. V
BUS
(pin 8) and DGNDU (pin
9) are also connected to the USB bus. V
BUS
(pin 8) never
consumes USB bus power, it is used only for detecting the
connection of the USB bus. The following information is
provided in the device descriptor.
The Input Terminal is defined as “USB stream” (terminal
type 0x0101). The Input Terminal can accept 2-channel
audio streams comprised of left and right channel data. The
Output Terminal is defined as a “speaker” (terminal type
0x0301). The Feature Unit supports the following sound
control features.
Volume Control
Mute Control
The built-in digital volume controller can be manipulated by
an audio class specific request from 0.0dB to –64.0dB in
steps of 1.0dB. Each channel can be set independently. The
master volume control is also supported. The built-in digital
mute controller can be manipulated by an audio class spe-
cific request. A master mute-control request is acceptable. A
request to an individual channel will be stalled and ignored.
Interface #1 has three alternative settings. Alternative setting
#0 is the Zero Bandwidth setting. Alternative setting #1 is
the 16-Bit Stereo setting, and is an operational setting.
Alternative setting #2 is the 16-Bit Monaural setting, and is
also an operational setting. The PCM2702 has the following
two endpoints.
Control Endpoint (EP #0)
Isochronous Audio Data Stream Endpoint (EP #2)
The Control Endpoint is a default endpoint and is used to
control all functions of the PCM2702 by the standard USB
request and the USB audio class specific request. The
Isochronous Audio Data Stream Endpoint is an audio sink
endpoint, which receives the PCM audio data, and accepts
the adaptive transfer mode.
USB Revision
Device Class
Device Subclass
Device Protocol
Max Packet Size for Endpoint 0
Vendor ID
Device ID
Release
1.0
0x00 (device defined interface level)
0x00 (not specified)
0x00 (not specified)
8 byte
0x08BB
0x2702
1.0
TABLE I. Device Definition.
DEVICE CONFIGURATION
Figure 1 illustrates USB audio function topology. The
PCM2702 has two interfaces. Each interface is constructed
by some alternative setting. Interface #0 has one alternative
setting. Alternative setting #0 describes the standard audio
control interface. The audio control interface is constructed
by a terminal. The PCM2702 has the following three termi-
nals.
Input Terminal (IT)
Output Terminal (OT)
Feature Unit (FU)
Endpoint #0
PCM2702
Default
Endpoint
Endpoint #2
Audio Streaming Interface
(IF #1)
IT
TID1
OT
TID2
Standard Audio Control Interface (IF #0)
FU
UID3
Analog Out
NOTE: IT = Input Terminal (Terminal ID #1); OT = Output Terminal (Terminal ID #2); FU = Feature Unit (Unit ID #3).
FIGURE 1. USB Audio Function Topology.
相關PDF資料 |
PDF描述 |
|---|---|
| PCM3000 | Stereo Audio CODEC 18-BITS, SERIAL INTERFACE TM |
| PCM3000E | Stereo Audio CODEC 18-BITS, SERIAL INTERFACE TM |
| PCM3001 | Stereo Audio CODEC 18-BITS, SERIAL INTERFACE TM |
| PCM3001E | Stereo Audio CODEC 18-BITS, SERIAL INTERFACE TM |
| PCM3002E | 16-/20-Bit Single-Ended Analog Input/Output STEREO AUDIO CODECs |
相關代理商/技術參數 |
參數描述 |
|---|---|
| PCM2702E | 制造商:Texas Instruments 功能描述:SEMICONDUCTOR ((NW)) |
| PCM2702E/2K | 功能描述:音頻數/模轉換器 IC 16-Bit Stereo DAC w/USB Ifc RoHS:否 制造商:Texas Instruments 轉換器數量: 分辨率:16 bit 接口類型:I2S, UBS 轉換速率: 信噪比:98 dB 工作電源電壓:5 V DAC 輸出端數量:2 工作溫度范圍:- 25 C to + 85 C 電源電流:23 mA 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-32 封裝:Reel |
| PCM2702E/2KG4 | 功能描述:音頻數/模轉換器 IC 16-Bit Stereo DAC w/USB Ifc RoHS:否 制造商:Texas Instruments 轉換器數量: 分辨率:16 bit 接口類型:I2S, UBS 轉換速率: 信噪比:98 dB 工作電源電壓:5 V DAC 輸出端數量:2 工作溫度范圍:- 25 C to + 85 C 電源電流:23 mA 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-32 封裝:Reel |
| PCM2702EG | 功能描述:音頻數/模轉換器 IC 16-Bit Stereo DAC w/USB Ifc RoHS:否 制造商:Texas Instruments 轉換器數量: 分辨率:16 bit 接口類型:I2S, UBS 轉換速率: 信噪比:98 dB 工作電源電壓:5 V DAC 輸出端數量:2 工作溫度范圍:- 25 C to + 85 C 電源電流:23 mA 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-32 封裝:Reel |
| PCM2702EG/2K | 功能描述:音頻數/模轉換器 IC 16-Bit Stereo DAC w/USB Ifc RoHS:否 制造商:Texas Instruments 轉換器數量: 分辨率:16 bit 接口類型:I2S, UBS 轉換速率: 信噪比:98 dB 工作電源電壓:5 V DAC 輸出端數量:2 工作溫度范圍:- 25 C to + 85 C 電源電流:23 mA 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-32 封裝:Reel |
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