STA32813TR View Datasheet(PDF) - STMicroelectronics
Part Name
Description
Manufacturer
STA32813TR Datasheet PDF : 57 Pages
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STA328
Register description
6.7
6.7.1
Note:
6.7.2
6.7.3
Volume control
Master controls
Master mute register (addr 0x06)
D7
Reserved
0
D6
Reserved
0
D5
Reserved
0
D4
Reserved
0
D3
Reserved
0
D2
Reserved
0
D1
Reserved
0
D0
MMUTE
0
Master volume register (addr 0x07)
D7
MV7
1
D6
MV6
1
D5
MV5
1
D4
MV4
1
D3
MV3
1
D2
MV2
1
D1
MV1
1
D0
MV0
1
Value of volume derived from MVOL is dependent on AMV AutoMode volume settings.
Channel controls
Channel 1 volume (addr 0x08)
D7
C1V7
0
D6
C1V6
1
D5
C1V5
1
D4
C1V4
0
Channel 2 volume (addr 0x09)
D7
C2V7
0
D6
C2V6
1
D5
C2V5
1
D4
C2V4
0
Channel 3 volume (addr 0x0A)
D7
C3V7
0
D6
C3V6
1
D5
C3V5
1
D4
C3V4
0
D3
C1V3
0
D3
C2V3
0
D3
C3V3
0
D2
C1V2
0
D2
C2V2
0
D2
C3V2
0
D1
C1V1
0
D1
C2V1
0
D1
C3V1
0
D0
C1V0
0
D0
C2V0
0
D0
C3V0
0
Volume description
The volume structure of the STA328 consists of individual volume registers for each of the
three channels and a master volume register, and individual channel volume trim registers.
The channel volume settings are normally used to set the maximum allowable digital gain
and to hard-set gain differences between certain channels. These values are normally set at
the initialization of the IC and not changed. The individual channel volumes are adjustable in
0.5-dB steps from +48 dB to -80 dB. The master volume control is normally mapped to the
master volume of the system. The values of these two settings are summed to find the
actual gain/volume value for any given channel.
When set to 1, the master mute will mute all channels, whereas the individual channel
mutes (CxM) will mute only that channel. Both the master mute and the channel mutes
provide a “soft mute” with the volume ramping down to mute in 4096 samples from the
maximum volume setting at the internal processing rate (approximately 96 kHz). A “hard
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