CM6206 Datasheet, PDF (24/35 Pages) C-Media Electronics – High Integrated USB Audio I/O Controller

CM6206
High Integrated USB Audio I/O Controller
7 Volume Control
7.1 DAC Volume Control
VOL_*_
<5:0>
Scale
(linear)
Scale
VOL_*_<5:0>
(linear)
Scale
Scale
VOL_*_<5:0>
VOL_*_<5:0>
(linear)
(linear)
00
1.000
10
0.724
20
0.448
30
0.171
01
0.973
11
0.696
21
0.420
31
0.144
02
0.944
12
0.669
22
0.392
32
0.116
03
0.917
13
0.641
23
0.365
33
0.088
04
0.890
14
0.613
24
0.337
34
0.061
05
0.862
15
0.586
25
0.309
35
0.033
06
0.834
16
0.558
26
0.282
36
0.006
07
0.807
17
0.530
27
0.254
37
mute
08
0.779
18
0.503
28
0.227
09
0.751
19
0.475
29
0.199
Note: VOL_*_ stands for VOL_FL_, VOL_FR_, VOL_CF_, VOL_LFE_, VOL_LS_, VOL_RS_, VOL_SL_, VOL_SR_. The volume control
is in
linear scale.
7.2 ADC Volume Control
Note: VOL_*_ stands for VOL_REC_L_ and VOL_REC_R_. The volume control is in log scale.
USB Request Data
VOL_*_<4:0>
(Hex)
0B7F~0B00
0AFF~0A80
0A7F~0A00
09FF~0980
097F~0900
08FF~0880
087F~0800
07FF~0780
077F~0700
06FF~0680
067F~0600
05FF~0580
057F~0500
04FF~0480
11111
11110
11101
11100
11011
11010
11001
11000
10111
10110
10101
10100
10011
10010
Scale (log)
+33dB
+31.5dB
+30dB
+28.5dB
+27dB
+25.5dB
+24dB
+22.5dB
+21dB
+19.5dB
+18dB
+16.5dB
+15dB
+13.5dB
USB Request Data
(Hex)
047F~0400
03FF~0380
037F~0300
02FF~0280
027F~0200
01FF~0180
017F~0100
00FF~0080
007F~0000
FFFF~FC00
FBFF~F800
F7FF~F400
F3FF~F000 / 8000
EFFF~EC00
VOL_*_<4:0> Scale (log)
10001
10000
01111
01110
01101
01100
01011
01010
01001
01000
00111
00110
00101
00100
+12dB
+10.5dB
+9dB
+7.5dB
+6dB
+4.5dB
+3dB
+1.5dB
0dB
-1.5dB
-3dB
-4.5dB
-6dB
-6dB
Note: VOL_*_ stands for VOL_REC_L_ and VOL_REC_R_. The volume control is in log scale.
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