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CS4298 데이터시트(PDF) 35 Page - Cirrus Logic

부품명 CS4298
상세설명  SoundFusion Audio/Modem Codec 97 (AMC 97)
PDF  52 Pages
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제조업체  CIRRUS [Cirrus Logic]
홈페이지  http://www.cirrus.com
Logo CIRRUS - Cirrus Logic

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CS4298
DS315PP2
35
6.1.35 AC Mode Control (Index 5Eh)
DDM
DAC Direct Mode. This bit controls the source to the line and alternate line output drivers. When set, the
Left and Right DAC directly drive the line and alternate line outputs by bypassing the audio mixer. When
clear, the audio mixer is the source for the line and alternate line outputs.
EAM
Extended Audio Mode. When set the output of MDAC2 and MDAC1 are mapped to the ALT_LINE OUT-
PUT. The MDAC volumes are set by the
Alternate Line Volume (Index 04h) register when in this mode.
EDM
Extended Docking Mode. When set the output of the analog input mixer is routed to the MADC1 and
MADC2 inputs. This allows any analog input mix to be digitized and routed to a second AC ‘97 codec
or allows the host controller to add effects processing to analog sources.
MD[1:0]
Mode. Sets basic operating mode for the codec. This effects the mapping of the ADCs and DACs to AC-
LINK Slot locations. See the Mode of Operation subsection for additional detail. Table XXX below details
the Slot mapping.
Default
0000h
6.1.36 S/PDIF Control (Index 68h)
SPEN
S/PDIF Enable. When set, Slot 6 and Slot 9 are mapped to the SPDIF_OUT pin. When in Mode 3 and
SPEN set, data is not passed to Modem DAC1 and Modem DAC2.
V
Validity Bit. When set, this bit notifies the S/PDIF receiver that the subframe data is not suitable for con-
version.
L
Generation Level.
CC[6:0]
Category Code.
Pre
Premphasis. If set, filter premphasis is 50/15
µs. If clear, premphasis is none.
Copy
Copyright. When clear, copyright is asserted. If clear, copyright is not asserted.
#Audio
#Audio valid. When clear, the data routed to the S/PDIF transmitter contains valid PCM data. For trans-
mitting all other compressed data formats, the #Audio bit must be set.
Default
0000h.
D15
D14
D13
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
EDM
EAM
DDM
MD1
MD0
Mode
Definition
Audio
DAC1
Audio
DAC2
Audio
ADC1
Audio
ADC2
Modem
DAC1
Modem
DAC2
Modem
ADC1
Modem
ADC2
GPIO
0
Basic
Left
Right
Left
Right
Line 1
Handset
Line 1
Handset
3434
5
11
5
11
12
1
2 Line
Left
Right
Left
Right
Line 1
Line 2
Line 1
Line 2
3434
5
10
5
10
12
2
Speakerphone
Left
Right
Left
Right
Line 1
Handset
Line 1
Mic
3434
5
11
5
6
12
3
Extended 4
Channel
Surrnd
Left
Surrnd
Right
Left
Right
Center
LFE
Line 1
Handset
7834
6
9
5
11
12
Table 9. Slot Assignments
D15
D14
D13
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
SPEN
V
0
0
L
CC6
CC5
CC4
CC3
CC2
CC1
CC0
Pre
Copy #Audio
0



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