CS42L55 Datasheet, PDF (57/73 Pages) Cirrus Logic – Ultra Low Power, Stereo CODEC w/Class H Headphone Amp

6.20 Master Volume Control:
MSTA (Address 18h) & MSTB (Address 19h)
7
MSTxVOL7
6
MSTxVOL6
5
MSTxVOL5
4
MSTxVOL4
3
MSTxVOL3
6.20.1 Master Volume Control
Sets the volume of the signal out the DSP.
MSTxVOL[7:0]
0001 1000
···
0000 0000
1111 1111
1111 1110
···
0011 0100
···
0001 1001
Step Size:
Master Volume
+12.0 dB
···
0 dB
-0.5 dB
-1.0 dB
···
-102 dB
···
-102 dB
0.5 dB
2
MSTxVOL2
CS42L55
1
MSTxVOL1
0
MSTxVOL0
6.21 Headphone Volume Control:
HPA (Address 1Ah) & HPB (Address 1Bh)
7
HPxMUTE
6
HPxVOL6
5
HPxVOL5
4
HPxVOL4
3
HPxVOL3
6.21.1 Headphone Channel x Mute
Configures an analog mute on the headphone amplifier.
HPxMUTE
0
1
HP Amp Mute
Disabled
Enabled
2
HPxVOL2
1
HPxVOL1
0
HPxVOL0
6.21.2 Headphone Volume Control
Sets the volume of the signal out of the headphone amplifier.
HPxVOL[6:0]
0111111
...
0001100
...
0000001
0000000
1111111
...
1000100
...
1000000
Step Size:
Heaphone Volume
12 dB
...
12 dB
...
+1.0 dB
0 dB
-1.0 dB
...
-60.0 dB (Actual volume is approximately -58 dB. (Note 1))
...
-60.0 dB (Actual volume is approximately -58 dB. (Note 1))
1.0 dB
Note:
1. The step size may deviate from 1.0 dB. Refer to Figure 25 and Figure 26 on page 69.
DS773F1
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