AD1819A Analog Devices, AD1819A Datasheet - Page 16

• Manufacturer Part Number: AD1819A
• Description: ac '97 Soundport(r) Codec
• Manufacturer: Analog Devices

AD1819A
MIX
3D
POP
3D Control (Index 22h)
DP [2:0]
Power-Down Control/Status (Index 26h)
ADC
DAC
ANL
REF
PR [5:0]
R
N
2
R
N
2
2
e
u
6
e
h
u
g
h
m
g
*
m
N
3
N
P
D
a
o
a
m
w
C
m
e
e
o
e
- r
n
D
r t
o
l o
w
n
Mono Output Select.
0 = Mix.
1 = Mic.
Phat Stereo Enhancement.
0 = Phat Stereo is off.
1 = Phat Stereo is on.
PCM Output Path. The POP bit controls the optional PCM out 3D bypass path (the pre- and post-
3D PCM outpaths are mutually exclusive).
0 = Pre-3D.
1 = Post-3D.
The register should be read before writing to generate a mask for only the bit(s) that need to be changed. The
default value is 0000h.
Depth Control. Sets 3D “Depth” Phat Stereo enhancement according to table below.
Ready Bits: The ready bits are read only, writing to REF, ANL, DAC, ADC will have no effect. These bits indi-
cate the status for the AD1819A subsections. If the bit is a one then that subsection is “ready.” Ready is defined as
the subsection able to perform in its nominal state.
ADC section ready to transmit data.
DAC section ready to accept data.
Analog gainuators, attenuators, and mixers ready.
Voltage References, V
Power-Down Bits. Bits 0 and 1 are to be used individually rather than in combination with each other. The last bit
PR3 can be used in combination with PR2 or by itself.
C
t n
/ l r
t S
t a
Power-Down State
ADCs and Input Mux Power-Down
DACs Power-Down
Analog Mixer Power-Down (V
Analog Mixer Power-Down (V
AC-Link Interface Power-Down
Internal Clocks Disabled
ADC and DAC Power-Down
V
Total Power-Down
D
REF
X
5 1
D
X
5 1
Standby Mode
D
X
4 1
D
X
4 1
D
X
3 1
REF
D
P
R
3 1
5
and V
D
X
D
P
2 1
R
2 1
DP3 . . . DP0
0
1
14
15
4
REFOUT
D
D
P
X
1 1
R
1 1
3
REF
REF
D
D
P
up to nominal level.
X
R
0 1
0 1
2
and V
and V
P
D
R
D
–16–
X
9
1
9
REFOUT
REFOUT
P
D
Depth
0%
6.67%
93.33%
100%
R
D
8
X
0
8
Off)
On)
D
X
7
D
X
7
D
Set Bits
PR0
PR1
PR1, PR2
PR0, PR1, PR3
PR4
PR0, PR1, PR4, PR5
PR0, PR1
PR0, PR1, PR2, PR4, PR5
PR0, PR1, PR2, PR3, PR4, PR5
X
6
D
X
6
D
X
5
D
X
5
D
X
4
D
X
4
R
D
E
D
3
D
F
P
3
3
A
D
N
D
D
2
L
P
2
2
D
D
D
A
D
1
P
C
1
1
A
D
D
D
D
P
0
C
0
0
D
0
D
0
0
0
e
e
0
0
a f
a f
0
REV. 0
0
h
u
h
u
t l
t l