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STA350BW датащи(PDF) 77 Page - STMicroelectronics

номер детали STA350BW
подробное описание детали  Sound Terminal® 2.1-channel high-efficiency digital audio system
PDF  86 Pages
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производитель  STMICROELECTRONICS [STMicroelectronics]
домашняя страница  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STA350BW датащи(HTML) 77 Page - STMicroelectronics

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STA350BW
Register description
Doc ID 018572 Rev 3
77/86
7.21
Extra volume resolution configuration registers (address
0x3F)
The extra volume resolution allows fine volume tuning by steps of 0.125dB.
The feature is enabled when VRESEN=1 , as depicted in Figure 31. The overall channel
volume in this case will be CxVol+CxVR (in dB). On top of the total volume range from
-80 dB to +48 dB, this extra volume resolution works in a volume range from -80 dB to +42
dB. For volumes greater than +42 dB, this function must not be selected.
Figure 31.
Extra resolution volume scheme
If VRESEN = 0 the channel volume will be defined only by the CxVol registers.
Fine-tuning steps can be set according to the following table for channels 1, 2, 3:
D7
D6
D5
D4
D3
D2
D1
D0
VRESEN
VRESTG
C3VR[1]
C3VR[0]
C2VR[1]
C2VR[0]
C1VR[1]
C1VR[0]
00
0
0
0
0
0
0
CxVR
Mode
00
0 dB
01
-0.125dB
10
-0.25dB
11
-0.375dB
Audio Data Out
CxVOL
Soft
Volume
X
X
Audio Data In
VRESEN
VRESTG
CxVR
MVOL or CxVOL’event
1
0
0
1
Audio Data Out
CxVOL
Soft
Volume
X
X
Audio Data In
VRESEN
VRESTG
CxVR
MVOL or CxVOL’event
1
0
0
1
AM045196v1



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