AD1986A Datasheet, PDF (22/56 Pages) Analog Devices – AC ’97 and HD Audio SoundMAX Codec

AD1986A
Table 74.
Register
L/RV [4:0]
(Left/Right
Volume)
L/RM
(Left/right mute)
x
Function
Left/right volume controls the left/right channel output gains from 0 dB to –46.5 dB.
The least significant bit represents –1.5 dB.
L/RM
L/RV [4:0]
Function
0
0 0000
0 dB
0
0 1111
−22.5 dB attenuation
0
1 1111
−46.5 dB attenuation
1
x xxxx
Muted
Mutes the left/right channels independently.
Reserved.
Default
Default
Default: muted (0x1)
Default: 0
HEADPHONE VOLUME (REGISTER 0x04)
This register controls the HP_OUT mute and volume controls. Each volume subregister contains five bits, generating 32 volume steps of
−1.5 dB each for a range of 0 dB to −46.5 dB.
Reg Name
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 Default
0x04 Headphones LM x x LV4 LV3 LV2 LV1 LV0 RM x x RV4 RV3 RV2 RV1 RV0 0x8080
Volume
Table 75.
Register
L/RV [4:0]
(Left/Right
Volume)
L/RM
(Left/Right Mute)
x
Function
Left/right volume controls the left/right channel output gains from 0 dB to –46.5 dB.
The least significant bit represents –1.5 dB.
L/RM
L/RV [4:0]
Function
0
0 0000
0 dB
0
0 1111
−22.5 dB attenuation
0
1 1111
−46.5 dB attenuation
1
x xxxx
Muted
Mutes the left/right channels independently.
Reserved.
Default
Default
Default: muted (0x1)
Default: 0
MONO VOLUME (REGISTER 0x06)
This register controls the MONO_OUT mute and volume control. The volume register contains five bits, generating 32 volume steps of
−1.5 dB each for a range of 0 dB to −46.5 dB.
Reg Name
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 Default
0x06 Mono Volume M x
x
x
x
x
x x x x x V4 V3 V2 V1 V0 0x8000
Table 76.
Register
V [4:0]
(Volume)
M (Mute)
x
Function
Volume controls the output gain from 0 dB to –46.5 dB. The least significant bit represents –1.5 dB.
M
V [4:0]
Function
Default
0
0 0000
0 dB
Default
0
0 1111
−22.5 dB attenuation
0
1 1111
−46.5 dB attenuation
1
x xxxx
Muted
Mutes the output.
Default: muted (0x1)
Reserved.
Default: 0
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