AD1885
Headphones Volume Registers (Index 04h)
Reg
Name
D15 D14 D13 D12 D11 D10 D9
D8
D7 D6 D5
D4
D3
D2
D1
D0
Default
Num
04h
Headphones Volume HPM X
LHV5 LHV4 LHV3 LHV2 LHV1 LHV0
X
X
RHV5 RHV4 RHV3 RHV2 RHV1 RHV0 8000h
RHV[5:0]
LHV[5:0]
HPM
Right Headphone Volume Control. The least significant bit represents 1.5 dB. This register controls the out-
put from +6 dB to a maximum attenuation of –88.5 dB.
Left Headphone Volume Control. The least significant bit represents 1.5 dB. This register controls the output
from +6 dB to a maximum attenuation of –88.5 dB.
Headphone Volume Mute. When this bit is set to “1,” the channel is muted.
HPM
xHV5 . . . xHV0
Function
0
0
0
1
00 0000
01 1111
11 1111
xx xxxx
6 dB Gain
–40.5 dB Attenuation
–88.5 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.
PC Beep Register (Index 0Ah)
Reg
Name
D15
D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D0 Default
D3
D2
D1
Num
0Ah
PC_BEEP Volume PCM
X
X
X
X
X
X
X
X
X
X
PCV3 PCV2 PCV1 PCV0 X 8000h
PCV[3:0]
PC Beep Volume Control. The least significant bit represents 3 dB attenuation. This register controls the output
from 0 dB to a maximum attenuation of –45 dB. The PC Beep is routed to Left and Right Line outputs even when
AD1885 is in a RESET state. This is so that Power-On Self-Test (POST) codes can be heard by the user in case
of a hardware problem with the PC.
PCM
PC Beep Mute. When this bit is set to “1,” the channel is muted.
PCM
PCV3 . . . PCV0
Function
0
0
1
0000
1111
xxxx
0 dB Attenuation
–45 dB Attenuation
∞ dB Attenuation
REV. 0
–13–
ADI [ ADI ]
