Table 7. analog mixer input gain values, Table 8. analog mixer input gain register index, Cs4205 – Cirrus Logic CS4205 User Manual
Page 31

CS4205
DS489PP4
31
5.8
Analog Mixer Input Gain Registers (Index 10h - 18h)
Mute
Stereo Input Mute. Setting this bit mutes the respective input signal, both right and left inputs.
GL[4:0]
Left Volume Control. The GL[4:0] bits are used to control the gain level of the left analog input
source to the Input Mixer. Each step corresponds to 1.5 dB gain adjustment, with
01000 = 0 dB. The total range is +12 dB to -34.5 dB gain. See Table 7 for further details.
GR[4:0]
Right Volume Control. The GR[4:0] bits are used to control the gain level of the right analog
input source to the Input Mixer. Each step corresponds to 1.5 dB gain adjustment, with
01000 = 0 dB. The total range is +12 dB to -34.5 dB gain. See Table 7 for further details.
Default
8808h. This value corresponds to 0 dB gain and Mute ‘set’.
The Analog Mixer Input Gain Registers are listed in Table 8.
D15
D14
D13
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
Mute
0
0
GL4
GL3
GL2
GL1
GL0
0
0
0
GR4
GR3
GR2
GR1
GR0
Gx4 - Gx0 Gain Level
00000
+12.0 dB
00001
+10.5 dB
…
…
00111
+1.5 dB
01000
0.0 dB
01001
-1.5 dB
…
…
11111
-34.5 dB
Table 7. Analog Mixer Input Gain Values
Register Index
Function
10h
Line In Volume
12h
CD Volume
14h
Video Volume
16h
Aux Volume
18h
PCM Out Volume
Table 8. Analog Mixer Input Gain Register Index