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WM8940CGEFL/RV 数据表(PDF) 78 Page - Wolfson Microelectronics plc

部件名 WM8940CGEFL/RV
功能描述  Mono CODEC with Speaker Driver
PDF  91 Pages
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制造商  WOLFSON [Wolfson Microelectronics plc]
网页  http://www.wolfsonmicro.com
标志 WOLFSON - Wolfson Microelectronics plc

WM8940CGEFL/RV 数据表(HTML) 78 Page - Wolfson Microelectronics plc

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WM8940
Production Data
w
PD, Rev 4.3, November 2011
78
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
REFER TO
3:0
LIMBOOST
0000
DAC Limiter volume boost (can be used as a stand
alone volume boost when LIMEN=0):
0000=0dB
0001=+1dB
0010=+2dB
… (1dB steps)
1011=+11dB
1100=+12dB
1101 to 1111=reserved
Output Signal
Path
26 (1Ah)
15:0
0000h
Reserved
27 (1Bh)
15:0
0000h
Reserved
28 (1Ch)
15:0
0000h
Reserved
29 (1Dh)
15:0
0000h
Reserved
30 (1Eh)
15:0
0000h
Reserved
31(1Fh)
15:0
0000h
Reserved
32 (20h)
15:10 ALCGAIN [5:0]
000000
Readback from this register will return the ALC gain in
this position
Input Limiter /
Automatic Level
Control (ALC)
9
0
Reserved
8
ALCSEL
0
ALC function select
0=ALC disabled
1=ALC enabled
Input Limiter /
Automatic Level
Control (ALC)
7:6
00
Reserved
5:3
ALCMAX
111
Set Maximum Gain of PGA
Input Limiter /
Automatic Level
Control (ALC)
2:0
ALCMIN
000
Set minimum gain of PGA
Input Limiter /
Automatic Level
Control (ALC)
33 (21h)
15:8
000h
Reserved
7:4
ALCHLD
000
ALC hold time before gain is increased.
Input Limiter /
Automatic Level
Control (ALC)
3:0
ALCLVL
1011
ALC threshold level. Sets the desired signal level.
Input Limiter /
Automatic Level
Control (ALC)
34 (22h)
15:9
00h
Reserved
8
ALCMODE
0
Determines the ALC mode of operation:
0=Normal mode
1=Limiter mode.
Input Limiter /
Automatic Level
Control (ALC)
7:4
ALCDCY
0011
Decay (gain ramp-up) time
Input Limiter /
Automatic Level
Control (ALC)
3:0
ALCATK
0010
ALC attack (gain ramp-down) time
Input Limiter /
Automatic Level
Control (ALC)
35 (23h)
15:4
000h
Reserved
3
NGEN
0
Noise gate function enable
1 = enable
0 = disable
Input Limiter /
Automatic Level
Control (ALC)
2:0
NGTH
000
Noise gate threshold
Input Limiter /
Automatic Level
Control (ALC)
36 (24h)
15:8
00h
Reserved



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