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參數(shù)資料
| 型號： | WM8773 |
| 廠商： | Wolfson Microelectronics |
| 元件分類： | ADC |
| 英文描述： | 24-bit, 96kHz ADC with 8 Channel I/P Multiplexer |
| 中文描述： | 24位，96kHz的ADC，具有8通道I /頁復(fù)用器 |
| 文件頁數(shù)： | 20/30頁 |
| 文件大?。?/td> | 270K |
| 代理商： | WM8773 |
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WM8773
Product Preview
PP Rev 1.0 June 2002
20
POWERDOWN MODE AND ADC DISABLE
Setting the PDWN register bit immediately powers down the WM8773, including the references,
overriding all other powerdown control bits. All trace of the previous input samples are removed, but
all control register settings are preserved. When PDWN is cleared the digital filters will be
reinitialised. It is recommended that the 8-channel input mux and buffer, and ADC are powered down
before setting PDWN.
REGISTER ADDRESS
11000
Powerdown Control
BIT
0
LABEL
PDWN
DEFAULT
0
DESCRIPTION
Power Down Mode Select:
0 : Normal Mode
1: Power Down Mode
The ADC may also be powered down by setting the ADCD disable bit. Setting ADCD will disable the
ADC and select a low power mode. The ADC digital filters will be reset and will reinitialise when
ADCD is reset.
REGISTER ADDRESS
11000
ADC Powerdown Control
BIT
1
LABEL
ADCD
DEFAULT
1
DESCRIPTION
ADC Disable:
0 : Normal Mode
1: Power Down Mode
ADC GAIN CONTROL
Control bits LAG[4:0] and RAG[4:0] control the ADC input gain, allowing the user to attenuate the
ADC input signal to match the full-scale range of the ADC. The gain is independently adjustable on
left and right inputs. Left and right inputs may also be independently muted. The LRBOTH control bit
allows the user to write the same attenuation value to both left and right volume control registers. The
ADC volume and mute also applies to the bypass signal path.
REGISTER
ADDRESS
11001
Attenuation
ADCL
BIT
LABEL
DEFAULT
DESCRIPTION
4:0
LAG[4:0]
01100
(0dB)
0
Attenuation data for Left channel ADC gain in 1dB steps. See Table
8
5
MUTE
Mute for Left channel ADC:
0: Mute off
1: Mute on
Setting LRBOTH will write the same gain value to LAG[4:0] and
RAG[4:0]
Attenuation data for right channel ADC gain in 1dB steps. See Table
8
6
LRBOTH
0
4:0
RAG[4:0]
01100
(0dB)
0
5
MUTE
Mute for Right channel ADC:
0: Mute off
1: Mute on
Setting LRBOTH will write the same gain value to RAG[4:0] and
LAG[4:0]
11010
Attenuation
ADCR
6
LRBOTH
0
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