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WM8904ECS/R Datasheet(PDF) 153 Page - Wolfson Microelectronics plc

Part # WM8904ECS/R
Description  Ultra Low Power CODEC for Portable Audio Applications
PDF  188 Pages
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Manufacturer  WOLFSON [Wolfson Microelectronics plc]
Direct Link  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8904ECS/R Datasheet(HTML) 153 Page - Wolfson Microelectronics plc

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Pre-Production
WM8904
w
PP, Rev 3.3, September 2012
153
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
REFER TO
R41 (29h)
DRC 1
15:12
DRC_ATK [3:0]
0011
Gain attack rate (seconds/6dB)
0000 = Reserved
0001 = 182µs
0010 = 363µs
0011 = 726µs (default)
0100 = 1.45ms
0101 = 2.9ms
0110 = 5.8ms
0111 = 11.6ms
1000 = 23.2ms
1001 = 46.4ms
1010 = 92.8ms
1011-1111 = Reserved
Dynamic Range
Control (DRC)
11:8
DRC_DCY [3:0]
0010
Gain decay rate (seconds/6dB)
0000 = 186ms
0001 = 372ms
0010 = 743ms (default)
0011 = 1.49s
0100 = 2.97s
0101 = 5.94s
0110 = 11.89s
0111 = 23.78s
1000 = 47.56s
1001-1111 = Reserved
Dynamic Range
Control (DRC)
7:6
DRC_QR_THR
[1:0]
01
Quick release crest factor threshold
00 = 12dB
01 = 18dB (default)
10 = 24dB
11 = 30dB
Dynamic Range
Control (DRC)
5:4
DRC_QR_DCY
[1:0]
00
Quick release decay rate (seconds/6dB)
00 = 0.725ms (default)
01 = 1.45ms
10 = 5.8ms
11 = Reserved
Dynamic Range
Control (DRC)
3:2
DRC_MINGAIN
[1:0]
10
Minimum gain the DRC can use to attenuate audio
signals
00 = 0dB (default)
01 = -6dB
10 = -12dB
11 = -18dB
Dynamic Range
Control (DRC)
1:0
DRC_MAXGAIN
[1:0]
00
Maximum gain the DRC can use to boost audio
signals
00 = 12dB
01 = 18dB (default)
10 = 24dB
11 = 36dB
Dynamic Range
Control (DRC)
Register 29h DRC 1



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