WM8994 Datasheet, PDF (78/359 Pages) Wolfson Microelectronics plc – Multi-Channel Audio Hub CODEC for Smartphones

WM8994
REGISTER
ADDRESS
R1106 (0452h)
AIF1 DRC2 (3)
BIT
1:0
15:12
11:10
9:8
7:6
5:3
LABEL
DEFAULT
Production Data
DESCRIPTION
AIF1DRC2_MAX
01
GAIN [1:0]
AIF1DRC2_NG_
MINGAIN [3:0]
0000
AIF1DRC2_NG_
00
EXP [1:0]
AIF1DRC2_QR_
00
THR [1:0]
AIF1DRC2_QR_
00
DCY [1:0]
AIF1DRC2_HI_C
000
OMP [2:0]
AIF1 DRC2 Maximum gain to boost
audio signals (dB)
00 = 12dB
01 = 18dB
10 = 24dB
11 = 36dB
AIF1 DRC2 Minimum gain to
attenuate audio signals when the
noise gate is active.
0000 = -36dB
0001 = -30dB
0010 = -24dB
0011 = -18dB
0100 = -12dB
0101 = -6dB
0110 = 0dB
0111 = 6dB
1000 = 12dB
1001 = 18dB
1010 = 24dB
1011 = 30dB
1100 = 36dB
1101 to 1111 = Reserved
AIF1 DRC2 Noise Gate slope
00 = 1 (no expansion)
01 = 2
10 = 4
11 = 8
AIF1 DRC2 Quick-release threshold
(crest factor in dB)
00 = 12dB
01 = 18dB
10 = 24dB
11 = 30dB
AIF1 DRC2 Quick-release decay
rate (seconds/6dB)
00 = 0.725ms
01 = 1.45ms
10 = 5.8ms
11 = Reserved
AIF1 DRC2 Compressor slope
(upper region)
000 = 1 (no compression)
001 = 1/2
010 = 1/4
011 = 1/8
100 = 1/16
101 = 0
110 = Reserved
111 = Reserved
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PD, April 2012, Rev 4.4
78