Cirrus Logic CS42L55 - Manual (Page 57)

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 Figure 25 and Figure 26 on page 69 .
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. (Note 1) )
... ...
1000000 -60.0 dB (Actual volume is approximately -58 dB. (Note 1) )
Step Size: 1.0 dB