Register description
STA333BWQS
6.7
6.7.1
6.7.2
6.7.3
6.7.4
6.7.5
Volume control registers (0x06 to 0x0A)
Mute/line output configuration register
D7
D6
D5
LOC1
LOC0
0
0
D4
D3
D2
D1
C3M
C2M
C1M
0
0
0
Table 52. Line output configuration
LOC[1:0]
Line output configuration
00
Line output fixed, no volume, no EQ
01
Line output variable, CH3 volume effects line output, no EQ
10
Line output variable with EQ, CH3 volume effects line output
D0
MMUTE
0
Line output is only active when OCFG = 00. In this case LOC determines the line output
configuration. The source of the line output is always the channel 1 and 2 inputs.
Master volume register
D7
MV7
1
D6
MV6
1
D5
MV5
1
D4
MV4
1
D3
MV3
1
D2
MV2
1
D1
MV1
1
D0
MV0
1
Channel 1 volume
D7
C1V7
0
D6
C1V6
1
D5
C1V5
1
Channel 2 volume
D4
C1V4
0
D3
C1V3
0
D2
C1V2
0
D1
C1V1
0
D0
C1V0
0
D7
C2V7
0
D6
C2V6
1
D5
C2V5
1
D4
C2V4
0
Channel 3 / line output volume
D3
C2V3
0
D2
C2V2
0
D1
C2V1
0
D0
C2V0
0
D7
C3V7
0
D6
C3V6
1
D5
C3V5
1
D4
C3V4
0
D3
C3V3
0
D2
C3V2
0
D1
C3V1
0
D0
C3V0
0
The volume structure of the STA333BWQS consists of individual volume registers for each
channel and a master volume register that provides an offset to each channels volume
setting. The individual channel volumes are adjustable in 0.5 dB steps from +48 dB to
-80 dB.
As an example if C3V = 0x00 or +48 dB and MV = 0x18 or –12 dB, then the total gain for
channel 3 = +36 dB.
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