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WM8772SEDS/RV Fiches technique(PDF) 31 Page - Wolfson Microelectronics plc

No de pièce WM8772SEDS/RV
Description  24-bit, 192kHz 6-Channel Codec with Volume Control
PDF  73 Pages
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Fabricant  WOLFSON [Wolfson Microelectronics plc]
Site Internet  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8772SEDS/RV Fiches technique(HTML) 31 Page - Wolfson Microelectronics plc

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Production Data
WM8772EDS – 28 LEAD SSOP
w
PD Rev 4.2 October 2005
31
CONTROL INTERFACE REGISTERS
ATTENUATOR CONTROL MODE
Setting the ATC register bit causes the left channel attenuation settings to be applied to both left and
right channel DACs from the next audio input sample. No update to the attenuation registers is
required for ATC to take effect.
REGISTER ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
0000010
DAC Channel Control
3
ATC
0
Attenuator Control Mode:
0: Right channels use right
attenuations
1: Right channels use left
attenuations
INFINITE ZERO DETECT ENABLE
Setting the IZD register bit will enable the internal infinite zero detect function:
REGISTER ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
0000010
DAC Channel Control
4
IZD
0
Infinite Zero Mute Enable
0 : Disable inifinite zero mute
1: Enable infinite zero mute
With IZD enabled, applying 1024 consecutive zero input samples each stereo channel will cause that
stereo channel outputs to be muted to VMID. Mute will be removed as soon as that stereo channel
receives a non-zero input.
DAC OUTPUT CONTROL
The DAC output control word determines how the left and right inputs to the audio Interface are
applied to the left and right DACs:
REGISTER ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
PL[3:0]
Left
Output
Right
Output
0000
Mute
Mute
0001
Left
Mute
0010
Right
Mute
0011
(L+R)/2
Mute
0100
Mute
Left
0101
Left
Left
0110
Right
Left
0111
(L+R)/2
Left
1000
Mute
Right
1001
Left
Right
1010
Right
Right
1011
(L+R)/2
Right
1100
Mute
(L+R)/2
1101
Left
(L+R)/2
1110
Right
(L+R)/2
0000010
DAC Control
8:5
PL[3:0]
1001
1111
(L+R)/2
(L+R)/2



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