ad1881a Analog Devices, Inc., ad1881a Datasheet - Page 14

• Manufacturer Part Number: ad1881a
• Description: Ac?97 Soundmax Codec
• Manufacturer: Analog Devices, Inc.

AD1881A
CD Volume (Index 12h)
RCV[4:0]
LCV[4:0]
CVM
Video Volume (Index 14h)
RVV[4:0]
LVV[4:0]
VM
AUX Volume (Index 16h)
RAV[4:0]
LAV[4:0]
AM
PCM Out Volume (Index 18h)
ROV[4:0]
LOV[4:0]
OM
R g
R g
R g
R g
R
N m
N m
N m
N m
N
2 1 h
2 1 h
2 1 h
2 1 h
2 1
R g
R g
R g
R g
R
N m
N m
N m
N m
N
4 1 h
4 1 h
4 1 h
4 1 h
4 1
R g
R g
R g
R g
R
N m
N m
N m
N m
N
6 1 h
6 1 h
6 1 h
6 1 h
6 1
R g
R g
R g
R g
R
N m
N m
N m
N m
N
8 1 h
8 1 h
8 1 h
8 1 h
8 1
e
e
e
e
e
e
e
e
e
e
e
e
e
e
u
u
u
u
u
e
e
u
u
u
u
u
e
e
u
u
u
u
u
e
e
u
u
u
u
u
h
h
h
h
g
g
g
g
m
m
m
m
N
N
N
N
N
C
C
C
C
C
N
N
N
N
N
V
V
V
V
V
N
N
N
N
N
A
A
A
A
A
N
N
N
N
N
P
P
P
P
P
V
V
V
V
V
a
a
a
a
a
a
d i
d i
d i
d i
d i
a
a
a
u
u
u
u
u
a
a
a
C
C
C
C
C
o
o
o
o
o
a
a
D
D
D
D
D
a
a
a
a
a
a
m
m
m
m
m
m
m
m
m
m
m
m
m
m
m
m
m
m
m
m
u l
u l
u l
u l
u l
x
x
x
x
x
M
M
M
M
M
e
e
e
e
e
V
V
V
V
V
o
o
o
o
o
V
V
V
m
m
m
m
m
e
e
e
e
e
e
e
e
e
e
e
e
e
e
e
V
V
e
e
e
e
e
o
o
o
o
o
O
O
O
O
O
o
o
o
o
o
V
V
V
V
V
e
e
e
e
e
u l
u l
u l
u l
u l
u l
u l
u l
u l
u l
t u
t u
t u
t u
t u
o
o
o
o
o
m
m
m
m
m
u l
u l
u l
u l
u l
m
m
m
m
m
e
e
e
e
e
m
m
m
m
m
e
e
e
e
e
Right CD Volume. Allows setting the CD right channel attenuator in 32 steps. The LSB represents 1.5 dB, and
the range is +12 dB to –34.5 dB. The default value is 0 dB, mute enabled.
Left CD Volume. Allows setting the CD left channel attenuator in 32 steps. The LSB represents 1.5 dB, and the
range is +12 dB to –34.5 dB. The default value is 0 dB, mute enabled.
CD Volume Mute. When this bit is set to “1,” the channel is muted.
Right Video Volume. Allows setting the Video right channel attenuator in 32 steps. The LSB represents 1.5 dB,
and the range is +12 dB to –34.5 dB. The default value is 0 dB, mute enabled.
Left Video Volume. Allows setting the Video left channel attenuator in 32 steps. The LSB represents 1.5 dB, and
the range is +12 dB to –34.5 dB. The default value is 0 dB, mute enabled.
Video Mute. When this bit is set to “1,” the channel is muted.
Right Aux. Volume. Allows setting the Aux right channel attenuator in 32 steps. The LSB represents 1.5 dB, and
the range is +12 dB to –34.5 dB. The default value is 0 dB, mute enabled.
Left Aux. Volume. Allows setting the Aux left channel attenuator in 32 steps. The LSB represents 1.5 dB, and the
range is +12 dB to –34.5 dB. The default value is 0 dB, mute enabled.
Aux. Mute. When this bit is set to “1,” the channel is muted.
Right PCM Out Volume. Allows setting the PCM right channel attenuator in 32 steps. The LSB represents 1.5 dB,
and the range is +12 dB to –34.5 dB. The default value is 0 dB, mute enabled.
Left PCM Out Volume. Allows setting the PCM left channel attenuator in 32 steps. The LSB represents 1.5 dB,
and the range is +12 dB to –34.5 dB. The default value is 0 dB, mute enabled.
PCM Out Volume Mute. When this bit is set to “1,” the channel is muted.
e
e
e
e
e
D 5 1
D 5 1
D 5 1
D 5 1
D
C M
C M
C M
C M
C
D 5 1
D 5 1
D 5 1
D 5 1
D
AM
AM
AM
A
AM
D 5 1
D 5 1
D 5 1
D 5 1
D
OM
OM
OM
OM
O
V
V
V
V
V
5 1
D 5 1
D 5 1
D 5 1
D 5 1
D
VM
VM
VM
VM
V
M
5 1
5 1
M
M
M
5 1
D 4 1
D 4 1
D 4 1
D 4 1
D
X X X X X
D 4 1
D 4 1
D 4 1
D 4 1
D
X X X X X
D 4 1
D 4 1
D 4 1
D 4 1
D
X X X X X
D 4 1
D 4 1
D 4 1
X X X X X
4 1
D 4 1
D
4 1
4 1
4 1
D 3 1
D 3 1
D 3 1
D 3 1
D
X X X X X
D 3 1
D 3 1
D 3 1
D 3 1
D
X X X X X
D 3 1
D 3 1
D 3 1
D 3 1
D
X X X X X
D 3 1
D 3 1
D 3 1
D 3 1
D
X X X X X
3 1
3 1
3 1
3 1
D 2 1
D 2 1
D 2 1
D 2 1
D
L
L
L
L
L
D 2 1
D 2 1
D 2 1
D 2 1
D
L
L
L
L
L
D 2 1
D 2 1
D 2 1
D 2 1
D
L
L
L
L
L
C
C
C
C
C
D 2 1
D 2 1
D 2 1
D 2 1
D
L
L
L
L
L
A
A
A
A
A
O
O
O
O
O
2 1
2 1
2 1
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
2 1
V
V
V
V
V
4
4
4
4
4
V
V
V
V
V
4
4
4
4
4
4
4
4
4
4
MM
0
0
0
1
4
4
4
4
4
D 1 1
D 1 1
D 1 1
L
L
L
D 1 1
D
L
L
D 1 1
D 1 1
D 1 1
L
L
L
D 1 1
D 1 1
D 1 1
L
L
L
D 1 1
D
L
L
D 1 1
D
L
L
C
C
C
C
C
D 1 1
D 1 1
D 1 1
L
L
L
D 1 1
D
L
L
1 1
A
A
A
A
A
O
O
O
O
O
1 1
1 1
V
V
V
V
V
V
V
V
V
V
1 1
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
Volume Table (Index 0Ch to 18h)
3
3
3
3
3
D 0 1
D 0 1
D 0 1
D 0 1
D
L
L
L
L
L
D 0 1
D 0 1
D 0 1
D 0 1
D
L
L
L
L
L
D 0 1
D 0 1
D 0 1
D 0 1
D
L
L
L
L
L
C
C
C
D 0 1
D 0 1
D 0 1
D 0 1
D
L
L
L
L
L
C
C
0 1
A
A
A
O
O
O
A
A
O
O
0 1
0 1
V
V
V
V
V
V
V
V
V
V
0 1
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
2
2
2
2
2
x4 . . . x0
00000
01000
11111
xxxxx
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
D9
D9
D9
D9
D
L
L
L
L
L
D9
D9
D9
D9
D
L
L
L
L
L
D9
D9
D9
D9
D
L
L
L
L
L
D9
D9
D9
D
D9
L
L
L
L
L
C
C
C
C
C
9
A
A
A
A
A
O
O
O
O
O
V
V
V
V
V
9
9
V
V
V
V
V
9
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
D8
D8
D8
D8
D
L
L
L
L
L
D8
D8
D8
D
D8
L
L
L
L
L
D8
D8
D8
D8
D
L
L
L
L
L
D8
D8
D8
D8
D
L
L
L
L
L
C
C
C
C
C
8
V
V
V
V
V
A
A
A
A
A
O
O
O
O
O
8
8
8
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
D7
D7
D7
D7
D
X X X X X
D7
D7
D7
D
D7
D7
D7
D7
D7
D
D7
D7
D7
D7
D
X X X X X
X X X X X
X X X X X
7
7
7
7
Function
+12 dB Gain
0 dB Gain
–34.5 dB Gain
–∞ dB Gain
D6
D6
D6
X X X X X
D6
D
D6
D6
D6
X X X X X
D6
D
D6
D6
D6
X X X X X
D6
D6
D6
X X X X X
D6
D
D6
D
6
6
6
6
D5
D5
D5
D5
D
X X X X X
D5
D5
D5
D
D5
X X X X X
D5
D5
D5
D5
D
X X X X X
D5
D5
D5
D5
D
X X X X X
5
5
5
5
D4
D4
D4
D
D4
R
R
R
R
R
D4
D4
D4
D4
D
R
R
R
R
R
D4
D4
D4
D4
D
R
R
R
R
R
D4
D4
D4
D4
D
R
R
R
R
R
V
V
V
V
V
C
C
C
C
C
4
A
A
A
A
A
O
O
O
O
O
4
4
4
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
D3
D3
D3
R
R
R
D3
D3
D3
R
R
R
D3
D
R
R
D3
D
R
R
D3
D3
D3
R
R
R
D3
D3
D3
R
R
R
D3
D
R
R
D3
D
R
R
V
V
V
V
V
C
C
C
C
C
3
3
A
A
A
A
A
O
O
O
O
O
3
3
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
D2
D2
D2
D
D2
R
R
R
R
R
D2
D2
D2
D2
D
R
R
R
R
R
D2
D2
D2
D2
D
R
R
R
R
R
D2
D2
D2
D2
D
R
R
R
R
R
V
V
V
C
C
C
V
V
C
C
2
A
A
A
O
O
O
2
A
A
O
O
2
2
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
D1
D1
D1
R
R
R
D1
D1
D1
D
D1
R
R
R
R
R
D1
D
R
R
D1
D1
D1
R
R
R
D1
D1
D1
R
R
R
D1
D
R
R
D1
D
R
R
V
V
V
V
V
C
C
C
C
C
1
1
A
A
A
A
A
O
O
O
O
O
1
1
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
D0
D0
D0
D
D0
R
R
R
R
R
D0
D0
D0
D0
D
R
R
R
R
R
D0
D0
D0
D0
D
R
R
R
R
R
D0
D0
D0
D0
D
R
R
R
R
R
C
C
C
V
V
V
V
V
C
C
0
A
A
A
O
O
O
0
A
A
O
O
0
0
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
D
D
D
D
D
8 8 h
8 8 h
8 8 h
8 8
8 8
D
D
D
D
D
8 8 h
8 8 h
8 8 h
8 8
8 8
D
D
D
D
D
8 8 h
8 8 h
8 8 h
8 8
8 8
D
D
D
D
D
8 8 h
8 8 h
8 8 h
8 8
8 8
e
e
e
e
e
e
e
e
e
e
8 0
8 0
8 0
e
e
e
e
e
e
8 0
8 0
8 0
8 0
8 0
e
e
e
e
8 0
8 0
8 0
8 0
8 0
8 0
8 0
8 0
8 0
8 0
8 0
8 0
a f
a f
a f
a f
a f
a f
a f
a f
a f
a f
a f
a f
a f
a f
a f
a f
a f
a f
a f
a f
h
h
h
h
h
h
h
h
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
u
t l
t l
t l
t l
t l
t l
t l
t l
t l
t l
t l
t l
t l
t l
t l
t l
t l
t l
t l
t l