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參數(shù)資料
| 型號： | WM8768 |
| 廠商： | Wolfson Microelectronics |
| 英文描述： | 24-bit, 192kHz 8-Channel DAC |
| 中文描述： | 24位，192kHz的8通道DAC |
| 文件頁數(shù)： | 28/38頁 |
| 文件大?。?/td> | 393K |
| 代理商： | WM8768 |
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WM8768
Production Data
w
PD Rev 4.1 March 2005
28
INFINITE ZERO DETECT
When it is set, the IZD register causes an analogue mute of the DAC channel output amplifier both
when there are 1024 zeros on that channel’s DIN pin or when it is manually muted by DMUTE or
MUTEALL.
REGISTER ADDRESS
0000010
DAC Channel Control
BIT
4
LABEL
IZD
DEFAULT
0
DESCRIPTION
IZD Enable
0 : Disable infinite zero mute
1: Enable infinite zero mute
This operation is only available in software mode and can sometimes create a very small click at the
output of the device.
DE-EMPHASIS MODE
Each stereo DAC channel has an individual de-emphasis control bit:
REGISTER ADDRESS
0001001
DAC De-emphahsis
Control
0001111
DAC4 Control
BIT
[8:6]
LABEL
DEEMPH
[2:0]
DEFAULT
000
DESCRIPTION
DAC 3, 2 and 1 De-emphasis
channel selection select:
4
DEEMPH4
0
DAC 4 De-emphasis channel
selection select:
{DEEMPH4,DEEMPH
[2:0]}
0000
0001
0010
0011
0100
0101
0110
0111
1000
1001
1010
1011
1100
1101
1110
1111
DAC
CHANNEL 4
DAC
CHANNEL 3
DAC
CHANNEL 2
DAC
CHANNEL 1
Not-DEEMPH
Not-DEEMPH
Not-DEEMPH
Not-DEEMPH
Not-DEEMPH
Not-DEEMPH
Not-DEEMPH
Not-DEEMPH
DEEMPH
DEEMPH
DEEMPH
DEEMPH
DEEMPH
DEEMPH
DEEMPH
DEEMPH
Not-DEEMPH
Not-DEEMPH
Not-DEEMPH
Not-DEEMPH
DEEMPH
DEEMPH
DEEMPH
DEEMPH
Not-DEEMPH
Not-DEEMPH
Not-DEEMPH
Not-DEEMPH
DEEMPH
DEEMPH
DEEMPH
DEEMPH
Not-DEEMPH
Not-DEEMPH
DEEMPH
DEEMPH
Not-DEEMPH
Not-DEEMPH
DEEMPH
DEEMPH
Not-DEEMPH
Not-DEEMPH
DEEMPH
DEEMPH
Not-DEEMPH
Not-DEEMPH
DEEMPH
DEEMPH
Not-DEEMPH
DEEMPH
Not-DEEMPH
DEEMPH
Not-DEEMPH
DEEMPH
Not-DEEMPH
DEEMPH
Not-DEEMPH
DEEMPH
Not-DEEMPH
DEEMPH
Not-DEEMPH
DEEMPH
DEEMPH
DEEMPH
Table 14 De-emphasis Control
Refer to Figure 25, Figure 26, Figure 27, Figure 28, Figure 29 and Figure 30 for details of the De-
Emphasis performance at different sample rates.
REGISTER ADDRESS
0000010
DAC DEEMPH
BIT
1
LABEL
DEEMP
ALL
DEFAULT
0
DESCRIPTION
DEEMPH Select:
0 : Normal Operation
1: De-emphasis all channels
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