AD1881A
Reset (Index 00h)
Reg
Name
Num
D15 D14 D13 D12 D11 D10 D9
SE4 SE3 SE2 SE1 SE0 ID9
D8
D7
D6
D5
D4
D3
D2
D1
D0
Default
0410h
00h
Reset
X
ID8
ID7
ID6
ID5
ID4
ID3
ID2
ID1
ID0
Note: Writing any value to this register performs a register reset, which causes all registers to revert to their default values (except
74h, which forces the serial configuration). Reading this register returns the ID code of the part and a code for the type of 3D Stereo
Enhancement.
ID[9:0] Identify Capability. The ID decodes the capabilities of AD1881A based on the following:
Bit = 1
Function
AD1881A
ID0
ID1
ID2
ID3
ID4
ID5
ID6
ID7
ID8
ID9
Dedicated MIC PCM In Channel
Modem Line Codec Support
Bass and Treble Control
Simulated Stereo (Mono to Stereo)
Headphone Out/True Line-Level Out
Loudness (Bass Boost) Support
18-Bit DAC Resolution
20-Bit DAC Resolution
18-Bit ADC Resolution
20-Bit ADC Resolution
0
0
0
0
1
0
0
0
0
0
SE[4:0] Stereo Enhancement. The 3D stereo enhancement identifies the Analog Devices 3D stereo enhancement.
Master Volume Registers (Index 02h)
Reg
Num
Name
D15
MM
D14
X
D13
D12
D11
D10
D9
D8
D7
X
D6
X
D5
D4
D3
D2
D1
D0
Default
Master
Volume
02h
LMV5 LMV4 LMV3 LMV2 LMV1 LMV0
RMV5 RMV4 RMV3 RMV2 RMV1 RMV0 8000h
RMV[5:0]
LMV[5:0]
MM
Right Master Volume Control. The least significant bit represents 1.5 dB. This register controls the output from
0 dB to a maximum attenuation of –94.5 dB.
Left Master Volume Control. The least significant bit represents 1.5 dB. This register controls the output from 0 dB to
a maximum attenuation of –94.5 dB.
Master Volume Mute. When this bit is set to “1,” the channel is muted.
MM
xMV5 . . . xMV0
Function
0
0
0
1
00 0000
01 1111
11 1111
xx xxxx
0 dB Attenuation
–46.5 dB Attenuation
–94.5 dB Attenuation
–
∞
dB Attenuation
Master Volume Mono (Index 06h)
Reg
Name
D15
D14 D13 D12 D11 D10 D9
D8
X
D7
X
D6
X
D5
X
D4
D3
D2
D1
D0
Default
Num
Master Volume
Mono
06h
MMM X
X
X
X
X
X
MMV4 MMV3 MMV2 MMV1 MMV0 8000h
MMV[4:0]
MMM
Mono Master Volume Control. The least significant bit represents 1.5 dB. This register controls the output from
0 dB to a maximum attenuation of –46.5 dB.
Mono Master Volume Mute. When this bit is set to “1,” the channel is muted.
REV. 0
–12–
ADI [ ADI ]
