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WM8980CGEFL/V bảng dữ liệu(PDF) 41 Page - Wolfson Microelectronics plc

tên linh kiện WM8980CGEFL/V
Giải thích chi tiết về linh kiện  Stereo CODEC with Speaker Driver and Video Buffer
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WM8980CGEFL/V bảng dữ liệu(HTML) 41 Page - Wolfson Microelectronics plc

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Pre-Production
WM8980
w
PP, Rev 3.8, May 2012
41
MINIMUM AND MAXIMUM GAIN
The ALCMIN and ALCMAX register bits set the minimum/maximum gain value that the PGA can be
set to whilst under the control of the ALC. This has no effect on the PGA when ALC is not enabled.
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
R32
ALC Control
1
5:3
ALCMAX
111
Set Maximum Gain of PGA
2:0
ALCMIN
000
Set minimum gain of PGA
Table 21 ALC Max/Min Gain
In normal mode, ALCMAX sets the maximum boost which can be applied to the signal. In limiter
mode, ALCMAX will normally have no effect (assuming the starting gain value is less than the
maximum gain specified by ALCMAX) because the maximum gain is set at the starting gain level.
ALCMIN sets the minimum gain value which can be applied to the signal.
Figure 19 ALC Min/Max Gain
ALCMAX
Maximum Gain (dB)
111
35.25
110
29.25
101
23.25
100
17.25
011
11.25
010
5.25
001
-0.75
000
-6.75
Table 22 ALC Max Gain Values



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