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WM8993 датащи(PDF) 53 Page - Wolfson Microelectronics plc

номер детали WM8993
подробное описание детали  Audio Hub CODEC for Multimedia Phones
PDF  229 Pages
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производитель  WOLFSON [Wolfson Microelectronics plc]
домашняя страница  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8993 датащи(HTML) 53 Page - Wolfson Microelectronics plc

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Production Data
WM8993
w
PD, November 2010, Rev 4.0
53
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
R124 (7Ch)
DRC Control 2
7:2
DRC_THRESH_
COMP [5:0]
000000
Compressor threshold T (dB)
000000 = 0dB
000001 = -0.75dB
000010 = -1.5dB
… (-0.75dB steps)
111100 = -45dB
111101 = Reserved
11111X = Reserved
R125 (7Dh)
DRC Control 3
15:11
DRC_AMP_CO
MP [4:0]
00000
Compressor amplitude at threshold
YT (dB)
00000 = 0dB
00001 = -0.75dB
00010 = -1.5dB
… (-0.75dB steps)
11110 = -22.5dB
11111 = Reserved
10:8
DRC_R0_SLOP
E_COMP [2:0]
100
Compressor slope R0
000 = 1 (no compression)
001 = 1/2
010 = 1/4
011 = 1/8
100 = 1/16
101 = 0
110 = Reserved
111 = Reserved
R126 (7Eh)
DRC Control 4
15:13
DRC_R1_SLOP
E_COMP [2:0]
000
Compressor slope R1
000 = 1 (no compression)
001 = 1/2
010 = 1/4
011 = 1/8
100 = 0
101 = Reserved
11X = Reserved
Table 20 DRC Compression Control
GAIN LIMITS
The minimum and maximum gain applied by the DRC is set by register fields DRC_MINGAIN and
DRC_MAXGAIN. These limits can be used to alter the DRC response from that illustrated in Figure
15. If the range between maximum and minimum gain is reduced, then the extent of the dynamic
range control is reduced. The maximum gain prevents quiet signals (or silence) from being
excessively amplified.



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