1 master volume control, 1 headphone channel x mute, 2 headphone volume control – Cirrus Logic CS42L55 User Manual
Page 57: P 57, Cs42l55
DS773F1
57
CS42L55
6.20
Master Volume Control:
MSTA (Address 18h) & MSTB (Address 19h)
6.20.1
Master Volume Control
Sets the volume of the signal out the DSP.
6.21
Headphone Volume Control:
HPA (Address 1Ah) & HPB (Address 1Bh)
6.21.1
Headphone Channel x Mute
Configures an analog mute on the headphone amplifier.
6.21.2
Headphone Volume Control
Sets the volume of the signal out of the headphone amplifier.
Note:
1.
The step size may deviate from 1.0 dB. Refer to
and
7
6
5
4
3
2
1
0
MSTxVOL7
MSTxVOL6
MSTxVOL5
MSTxVOL4
MSTxVOL3
MSTxVOL2
MSTxVOL1
MSTxVOL0
MSTxVOL[7:0]
Master Volume
0001 1000
+12.0 dB
···
···
0000 0000
0 dB
1111 1111
-0.5 dB
1111 1110
-1.0 dB
···
···
0011 0100
-102 dB
···
···
0001 1001
-102 dB
Step Size:
0.5 dB
7
6
5
4
3
2
1
0
HPxMUTE
HPxVOL6
HPxVOL5
HPxVOL4
HPxVOL3
HPxVOL2
HPxVOL1
HPxVOL0
HPxMUTE
HP Amp Mute
0
Disabled
1
Enabled
HPxVOL[6:0]
Heaphone Volume
0111111
12 dB
...
...
0001100
12 dB
...
...
0000001
+1.0 dB
0000000
0 dB
1111111
-1.0 dB
...
...
1000100
-60.0 dB (Actual volume is approximately -58 dB.
)
...
...
1000000
-60.0 dB (Actual volume is approximately -58 dB.
)
Step Size:
1.0 dB