- 您現在的位置：買賣IC網 > PDF目錄382720 > UDA1335H (NXP SEMICONDUCTORS) Universal Serial Bus USB Audio Playback Recording Peripheral APRP PDF資料下載
參數資料
| 型號： | UDA1335H |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 消費家電 |
| 英文描述： | Universal Serial Bus USB Audio Playback Recording Peripheral APRP |
| 中文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP64 |
| 封裝： | 14 X 20 MM, 2.80 MM HEIGHT, PLASTIC, SOT-319-2, QFP-64 |
| 文件頁數： | 14/44頁 |
| 文件大小： | 254K |
| 代理商： | UDA1335H |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁當前第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁
1998 Aug 28
14
Philips Semiconductors
Preliminary specification
Universal Serial Bus (USB) Audio
Playback Recording Peripheral (APRP)
UDA1335H
G
ENERAL DESCRIPTORS
The UDA1335H supports one configuration containing a
control interface, two audio interfaces and a HID interface.
The descriptor map that describes this configuration is
partly fixed and partly programmable.
The programmable part can be retrieved from one of four
configuration maps located in the firmware or from an
I
2
C-bus EEPROM. At start-up time one of four internal
configuration maps can be selected depending on the
logical combination of GP3 and GP4. It is possible to
overwrite this configuration map with a configuration map
loaded from an I
2
C-bus EEPROM.
A
UDIO DEVICE CLASS SPECIFIC DESCRIPTORS
The audio device class is partly specified with standard
descriptors and partly with specific audio device class
descriptors. The standard descriptors specify the number
and the type of the interface or endpoint. The UDA1335H
supports 7 different audio modes:
8-bit PCM mono or stereo audio data
16-bit PCM mono or stereo audio data
24-bit PCM mono or stereo audio data
Zero bandwidth mode.
Each mode is defined as an alternate setting of the audio
interface, selectable with the standard audio streaming
interface descriptor
bAlternateSetting
field.
The seven alternate settings are described in more detail
by the specific audio device class descriptors.
The UDA1335H supports the input terminal, output
terminal and the feature unit descriptors.
The input and output terminals are not controllable via the
USB. The feature unit provides the basic manipulation of
the incoming logical channels.
The supported sound features are:
Volume control
Mute control
Treble control
Bass control
Bass Boost control.
The maximum number of audio data samples within a USB
packet arriving on the isochronous sink endpoint is
restricted by the buffer capacity of this isochronous
endpoint. The maximum buffer capacity is 336 bytes/ms.
The input terminals can be defined by means of
wTerminalType.
T
HE STANDARD AUDIO STREAMING INTERFACE DESCRIPTOR
FOR THE ISOCHRONOUS DATA SINK ENDPOINT
In this section the descriptors are given for interface 1
which is used for receiving isochronous audio data from
the host.
Although in this specific UDA1335H application no
endpoint control properties can be used on the
isochronous adaptive sink endpoint, the descriptors are
still necessary to inform the host about the definition of this
endpoint: isochronous, adaptive, sink, continuous
sampling frequency (at input side of this endpoint) with a
lower boundary of 5 kHz and an upper boundary of
55 kHz.
The audio class specific descriptors can be requested with
the ‘Get Descriptor: configuration request’, which returns
all the descriptors, except the device descriptor.
For each alternate setting with audio, a maximum
bandwidth is claimed as indicated in the standard
isochronous audio data endpoint descriptor
wMaxPacketSize
field. To allow a small overshoot in the
number of audio samples per packet, the top sample
frequency of 55 kHz is taken in the calculation of the
bandwidth for each alternate setting. For each alternate
setting, with its own isochronous audio data endpoint
descriptor,
wMaxPacketSize
field is then defined as
described in Table 6.
Table 6
Audio bandwidth at each audio mode
T
HE STANDARD AUDIO STREAMING INTERFACE DESCRIPTOR
FOR THE ISOCHRONOUS DATA SOURCE ENDPOINT
Interface 2 is used for sending isochronous audio data to
the host. It has the same alternate settings as interface 1.
ALTERNATE
SETTING
AUDIO MODE
wMaxPacketSize
(HEX)
1
2
3
4
5
6
8-bit PCM, mono
8-bit PCM, stereo
16-bit PCM, mono
16-bit PCM, stereo
24-bit PCM, mono
24-bit PCM, stereo
3800
7000
7000
E000
A800
5001
相關PDF資料 |
PDF描述 |
|---|---|
| UDA1340 | Low-voltage low-power stereo audio CODEC with DSP features |
| UDA1340M | Low-voltage low-power stereo audio CODEC with DSP features |
| UDA1342 | Audio CODEC |
| UDA1344 | Low-voltage low-power stereo audio CODEC with DSP features |
| UDA1345 | Economy audio CODEC |
相關代理商/技術參數 |
參數描述 |
|---|---|
| UDA1338H | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Multichannel audio coder-decoder |
| UDA1338H/N1 | 制造商:NXP Semiconductors 功能描述:IC CODEC AUDIO 44QFP |
| UDA1338H/N1,518 | 功能描述:音頻放大器 MULTICHANNEL CODEC RoHS:否 制造商:STMicroelectronics 產品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| UDA1338H/N1,557 | 功能描述:音頻放大器 MULTICHANNEL CODEC RoHS:否 制造商:STMicroelectronics 產品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| UDA1338HB | 功能描述:音頻放大器 MULTICHANNEL CODEC RoHS:否 制造商:STMicroelectronics 產品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
發布緊急采購，3分鐘左右您將得到回復。