Production Data
WM8945
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
DRC_KNEE2_OP Enable
REFER TO
R33 (21h)
DRC Control
5
13
DRC_KNEE2_
OP_ENA
0
0 = Disabled
1 = Enabled
Output signal at the Noise Gate threshold ‘Knee2’.
00000 = -30dB
12:8
DRC_KNEE2_
OP[4:0]
0_0000
00001 = -31.5dB
00010 = -33dB
… (-1.5dB steps)
11110 = -75dB
11111 = -76.5dB
Only applicable when DRC_KNEE2_OP_ENA = 1.
Output signal at the Compressor ‘Knee1’.
00000 = 0dB
7:3
DRC_KNEE_O
P[4:0]
0_0000
00001 = -0.75dB
00010 = -1.5dB
… (-0.75dB steps)
11110 = -22.5dB
11111 = Reserved
Compressor slope (upper region)
000 = 1 (no compression)
001 = 1/2
2:0
DRC_HI_COM
P[2:0]
011
010 = 1/4
011 = 1/8
100 = 1/16
101 = 0
110 = Reserved
111 = Reserved
Register 21h DRC Control 5
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
REFER TO
DRC Quick-release threshold (crest factor in dB)
R34 (22h)
DRC Control
6
3:2
DRC_QR_THR
[1:0]
00
00 = 12dB
01 = 18dB
10 = 24dB
11 = 30dB
DRC Quick-release decay rate (seconds/6dB)
1:0
DRC_QR_DCY
[1:0]
00
00 = 0.725ms
01 = 1.45ms
10 = 5.8ms
11 = reserved
Register 22h DRC Control 6
PD, May 2011, Rev 4.1
131
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WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
