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參數(shù)資料
| 型號： | UDA1335H |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 消費(fèi)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(shù)： | 17/44頁 |
| 文件大?。?/td> | 254K |
| 代理商： | UDA1335H |
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1998 Aug 28
17
Philips Semiconductors
Preliminary specification
Universal Serial Bus (USB) Audio
Playback Recording Peripheral (APRP)
UDA1335H
Mute control
Mute is one of the sound features as defined in the “USB
Device Class Definition for Audio Devices” The mute
control request data
bMute
controls the position of the
mute switch. The position can be either on or off. When
bMute
is true the feature unit is muted. When
bMute
is
false the feature unit is not muted.
When the mute is active for the master channel, the value
of the sample is decreased smoothly to zero following a
raised cosine curve. There are 32 coefficients used to step
down the value of the data, each one being used 32 times
before stepping to the next. This amounts to a mute
transition of 23 ms at f
s
= 44.1 kHz. When the mute is
released, the samples are returned to the full level again
following a raised cosine curve with the same coefficients
being used in reversed order.
The mute, on the master channel is synchronized to the
sample clock, so that operation always takes place on
complete samples.
A mute can be given via the host or by pressing a
predefined GP pin.
Treble control
The treble control is available for the master channel of the
UDA1335H. The treble range is from 0 to 6 dB in steps of
2 dB. It should be noted that the negative treble values as
defined in the “USB Device Class Definition for Audio
Devices”are not supported by the UDA1335H; values
below 0 dB are returned as 0 dB. The corner frequency is
1500 Hz. Table 8 gives the mapping of the
bTreble
value
upon the actual treble setting of the USB APRP.
Table 8
Treble control characteristics
bTREBLE
TREBLE USB HOST
(dB)
TREBLE USB APRP
(dB)
B7
B6
B5
B4
B3
B2
B1
B0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0.00
0.25
0.50
0.75
1.00
1.25
1.50
1.75
2.00
2.25
2.50
2.75
3.00
3.25
...
5.25
...
7.25
...
9.25
...
31.75
0
2
4
0
0
0
1
0
1
0
1
6
0
0
0
1
1
1
0
1
6
0
0
1
0
0
1
0
1
6
0
1
1
1
1
1
1
1
6
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)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(chǎn)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(fēng)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(chǎn)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(fēng)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(chǎn)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(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
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