WM8918 Datasheet, PDF (143/176 Pages) Cirrus Logic – Ultra Low Power DAC for Portable Audio Applications

Production Data
WM8918
REGISTER
ADDRESS
R41 (29h)
DRC 1
BIT
LABEL
DEFAULT
DESCRIPTION
15:12 DRC_ATK[3:0]
11:8 DRC_DCY[3:0]
7:6 DRC_QR_THR
[1:0]
5:4 DRC_QR_DCY
[1:0]
3:2 DRC_MINGAIN
[1:0]
1:0 DRC_MAXGAI
N[1:0]
0011
0010
01
00
10
00
Gain attack rate (seconds/6dB)
0000 = instantaneous
0001 = 363us
0010 = 726us
0011 = 1.45ms (default)
0100 = 2.9ms
0101 = 5.8ms
0110 = 11.6ms
0111 = 23.2ms
1000 = 46.4ms
1001 = 92.8ms
1010 = 185.6ms
1011-1111 = Reserved
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
Quick release crest factor threshold
00 = 12dB
01 = 18dB (default)
10 = 24dB
11 = 30dB
Quick release decay rate (seconds/6dB)
00 = 0.725ms (default)
01 = 1.45ms
10 = 5.8ms
11 = Reserved
Minimum gain the DRC can use to attenuate audio
signals
00 = 0dB (default)
01 = -6dB
10 = -12dB
11 = -18dB
Maximum gain the DRC can use to boost audio signals
00 = 12dB
01 = 18dB (default)
10 = 24dB
11 = 36dB
Register 29h DRC 1
REFER TO
w
PD, Rev 4.1, January 2012
143