wm8918 Wolfson Microelectronics plc, wm8918 Datasheet - Page 142

• Manufacturer Part Number: wm8918
• Description: Ultra Low Power Dac For Portable Audio Applications
• Manufacturer: Wolfson Microelectronics plc

WM8918
Register 28h DRC 0
w
REGISTER
ADDRESS
R40 (28h)
DRC 0
12:11
10:6
BIT
15
14
5
3
2
1
0
DRC_DAC_PA
DRC_GS_HYS
DRC_STARTU
DRC_GS_ENA
DRC_GS_HYS
DRC_ANTICLI
DRC_FF_DEL
P_GAIN[4:0]
T_LVL[1:0]
DRC_ENA
DRC_QR
LABEL
TH
AY
P
T
DEFAULT
0_0110
00
0
0
1
1
1
1
1
DRC enable
1 = enabled
0 = disabled
DRC path select
0 = Digital Microphone path
1 = DAC path
Gain smoothing hysteresis threshold
00 = Low
01 = Medium (recommended)
10 = High
11 = Reserved
Initial gain at DRC startup
00000 = -3dB
00001 = -2.5dB
00010 = -2dB
00011 = -1.5dB
00100 = -1dB
00101 = -0.5dB
00110 = 0dB (default)
00111 = 0.5dB
01000 = 1dB
01001 = 1.5dB
01010 = 2dB
01011 = 2.5dB
01100 = 3dB
01101 = 3.5dB
01110 = 4dB
01111 = 4.5dB
10000 = 5dB
10001 = 5.5dB
10010 = 6dB
10011 to 11111 = Reserved
Feed-forward delay for anti-clip feature
0 = 5 samples
1 = 9 samples
Time delay can be calculated as 5/fs or 9/ fs, where fs
is the sample rate.
Gain smoothing enable
0 = disabled
1 = enabled
Quick release enable
0 = disabled
1 = enabled
Anti-clip enable
0 = disabled
1 = enabled
Gain smoothing hysteresis enable
0 = disabled
1 = enabled
DESCRIPTION
PD, Rev 4.0, September 2010
REFER TO
Production Data
142