ad1881a Analog Devices, Inc., ad1881a Datasheet - Page 15

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

Record Select Control Register (Index 1Ah)
RS[2:0]
LS[2:0]
Used to select the record source independently for right and left. See table for legend.
The default value is 0000h, which corresponds to MIC in.
Record Gain (Index 1Ch)
RIM[3:0]
LIM[3:0]
IM
R g
R g
R g
R g
R
N m
N m
N m
N m
N
1 h
1 h
1 h
1 h
1
R g
R g
R g
R g
R
N m
N m
N m
N m
N
1 h
1 h
1 h
1 h
1
A
A
A
A
A
C
C
C
C
C
e
e
e
e
e
u
u
u
e
e
e
e
e
u
u
u
u
u
u
u
g
h
g
h
m
m
N
N
N
N
N
R
R
R
R
R
N
N
N
N
N
R
R
R
R
R
a
a
a
a
a
c e
c e
c e
c e
c e
a
a
a
a
a
c e
c e
c e
c e
c e
m
m
m
m
m
m
m
m
m
m
o
o
o
o
o
o
o
o
o
o
e
e
e
e
e
r
r
r
r
r
e
e
e
e
e
r
r
r
r
r
d
d
d
d
d
d
d
d
d
d
S
S
S
S
S
G
G
G
G
G
e
e
e
e
e
a
a
a
a
a
e l
e l
e l
e l
e l
n i
n i
n i
n i
n i
t c
t c
t c
t c
t c
Right Record Select
Left Record Select.
Right Input Mixer Gain Control. Each LSB represents 1.5 dB, 0000 = 0 dB and the range is 0 dB to +22.5 dB.
Left Input Mixer Gain Control. Each LSB represents 1.5 dB, 0000 = 0 dB and the range is 0 dB to +22.5 dB.
Input Mute.
0 = Unmuted,
1 = Muted or –
D 5 1
D 5 1
D 5 1
D 5 1
D
X X X X X
D 5 1
D 5 1
D 5 1
D 5 1
D
IM
IM
IM
IM
I
M
5 1
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
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
3 1
3 1
∞
D 2 1
D 2 1
D 2 1
X X X X X
D 2 1
D 2 1
D 2 1
X X X X X
dB gain.
D 2 1
D
D 2 1
D
2 1
2 1
D 1 1
D 1 1
D 1 1
D 1 1
D
X X X X X
D 1 1
D 1 1
D 1 1
D 1 1
D
L
L
L
L
L
RS2 . . . RS0
0
1
2
3
4
5
6
7
LS2 . . . LS0
0
1
2
3
4
5
6
7
IM
0
0
1
I
I
I
I
I
1 1
1 1
M
M
M
M
M
3
3
3
3
3
D 0 1
D 0 1
D 0 1
D 0 1
D
L 2
L 2
L 2
L 2
L
D 0 1
D 0 1
D 0 1
D 0 1
D
L
L
L
L
L
xIM3 . . . xIM0 Function
1111
0000
xxxxx
S
S
S
S
S
I
I
I
I
I
0 1
0 1
M
M
M
M
M
2
2
2
2
2
2
D9
D9
D9
L 1
L 1
L 1
D9
D9
D9
L
L
L
D9
D
L 1
L
D9
D
L
L
S
S
S
S
S
I
I
I
I
I
9
9
M
M
M
M
M
1
1
1
1
1
1
Right Record Source
MIC
CD_R
VIDEO_R
AUX_R
LINE_IN_R
Stereo Mix (R)
Mono Mix
PHONE_IN
Left Record Source
MIC
CD_L
VIDEO_L
AUX_L
LINE_IN_L
Stereo Mix (L)
Mono Mix
PHONE_IN
D8
D8
D8
D8
D
L 0
L 0
L 0
L 0
L
D8
D8
D8
D
D8
L
L
L
L
L
S
S
S
I
I
I
S
S
I
I
8
8
M
M
M
M
M
0
0
0
0
0
0
+22.5 dB Gain
0 dB Gain
–
∞
D7
D7
D7
D7
D
D7
D7
D7
D
D7
X X X X X
X X X X X
7
7
dB Gain
D6
D6
D6
D6
D
X X X X X
D6
D6
D6
D
D6
X X X X X
6
6
D5
D5
D5
D5
D
X X X X X
D5
D5
D5
D
D5
X X X X X
5
5
D4
D4
D4
D4
D
X X X X X
D4
D4
D4
D
D4
X X X X X
4
4
D3
D3
D3
D3
D
X X X X X
D3
D3
D3
D
D3
R
R
R
R
R
I
I
I
I
I
3
3
M
M
M
M
M
3
3
3
3
3
D2
D2
D2
D2
D
R 2
R 2
R 2
R 2
R
D2
D2
D2
D
D2
R
R
R
R
R
S
S
S
S
S
I
I
I
I
I
2
2
M
M
M
M
M
2
2
2
2
2
2
D1
D1
D1
R 1
R 1
R 1
D1
D1
D1
R
R
R
D1
D
R 1
R
D1
D
R
R
S
S
S
S
S
I
I
I
I
I
1
1
M
M
M
M
M
1
AD1881A
1
1
1
1
1
D0
D0
D0
D0
D
R 0
R 0
R 0
R 0
R
D0
D0
D0
D
D0
R
R
R
R
R
S
S
S
I
I
I
S
S
I
I
0
0
M
M
M
M
M
0
0
0
0
0
0
D
D
D
D
D
0 0 h
0 0 h
0 0 h
0 0
0 0
D
D
D
D
D
0 8 h
0 8 h
0 8 h
0 8
0 8
e
e
e
e
e
e
e
e
e
e
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
a f
a f
a f
a f
a f
a f
a f
a f
a f
a f
h
h
h
h
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