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參數(shù)資料
| 型號： | WM8756EFT |
| 廠商： | Wolfson Microelectronics |
| 英文描述： | 192KHZ SIX CHANNEL SACD COMPATIBLE AUDIO DAC |
| 中文描述： | 192kHz的六聲道SACD的兼容的音頻數(shù)模轉(zhuǎn)換器 |
| 文件頁數(shù)： | 25/39頁 |
| 文件大?。?/td> | 330K |
| 代理商： | WM8756EFT |
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WM8756
Advance Information
AI Rev 1.3 October 2001
25
HARDWARE CONTROL MODES
When the MODE pin is held high, and DSDB pin is high, the following hardware modes of operation are
available.
MUTE AND AUTOMUTE OPERATION
In both hardware and software modes pin 12 (MUTE) controls selection of MUTE directly, and can be
used to enable and disable the automute function, or as an output of the automuted signal.
AUTOMUTED (Internal
Signal)
10k
SOFTMUTE
(Internal
Signal)
MUTE
PIN
Figure 14 Mute Circuit Operation
The MUTE pin behaves as a bi-directional function, that is, as an input to select MUTE or NOT-MUTE, or
as an output indication of automute operation. MUTE is active high; taking the pin high causes the filters
to soft mute, ramping down the audio signal over a few milliseconds. Taking MUTE low again allows data
into the filter.
The automute function detects a series of zero value audio samples of 1024 samples long being applied
to all 6 channels. After such an event, a latch is set whose output (AUTOMUTED) is wire OR’ed through a
10kohm resistor to the MUTE pin. Thus if the MUTE pin is not being driven, the automute function will
assert MUTE.
If MUTE is tied low, AUTOMUTED is overridden and will not mute. If MUTE is driven from a source
follower, or diode, then both MUTE and automute functions are available. If MUTE is not driven,
AUTOMUTED appears as a weak output (10k source impedance) so can be used to drive external mute
circuits.
INPUT FORMAT SELECTION
In hardware mode, pins 16 and 17 become input controls for selection of input data format type and input
data word length (see Table 16). I
S mode is designed to support any word length provided enough bit
clocks are sent.
ML/I2S
0
0
1
1
MC/IWL
0
1
0
1
INPUT DATA MODE
16-bit right justified
20-bit right justified
24-bit right justified
I
2
S mode
Table 16 Control of Input Data Format Type and Input Data Word Length
MD/DM DE-EMPHASIS
In hardware mode, pin 18 becomes an input control for selection of de-emphasis filtering to be applied
(see Table 17).
MD/DM
0
1
DE-EMPHASIS MODE
De-emphasis off
De-emphasis on
Table 17 De-emphasis Control
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| WM-875-899-PK | 制造商:Brady Corporation 功能描述:CONSECUTIVE NOS. - LEGEND: 875-899 |
| WM8758B | 制造商:WOLFSON 制造商全稱:WOLFSON 功能描述:Stereo CODEC with Headphone Driver and Line Out |
| WM8758BGEFL/RV | 功能描述:接口—CODEC Stereo CODEC plus PCM CODEC 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 安裝風格:SMD/SMT 封裝 / 箱體:DSBGA-81 封裝:Reel |
| WM8758BGEFL/V | 功能描述:接口—CODEC Stereo CODEC plus PCM CODEC 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 安裝風格:SMD/SMT 封裝 / 箱體:DSBGA-81 封裝:Reel |
| WM8758BLGEFL/RV | 功能描述:接口—CODEC Stereo CODEC Plus PCM CODEC 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 安裝風格:SMD/SMT 封裝 / 箱體:DSBGA-81 封裝:Reel |
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