wm8903 Wolfson Microelectronics plc, wm8903 Datasheet - Page 129

• Manufacturer Part Number: wm8903
• Description: Ultra Low Power Codec For Portable Audio Applications
• Manufacturer: Wolfson Microelectronics plc

Pre-Production
R40 (28h)
DRC 0
Register 28h DRC 0
w
REGISTER
ADDRESS
12:11
10:6
BIT
15
5
3
2
1
0
DRC_STARTUP_GAIN[4:0]
DRC_THRESH_HYST[1:0]
DRC_ANTICLIP_ENA
DRC_SMOOTH_ENA
DRC_HYST_ENA
DRC_FF_DELAY
DRC_QR_ENA
DRC_ENA
LABEL
DEFAULT
0_0110
01
0
1
1
1
1
1
DRC enable
1 = enabled
0 = disabled
Gain smoothing hysteresis threshold
00 = Low
01 = Medium (recommended)
10 = High
11 = Reserved
Initial gain at DRC startup
00000 = -18dB
00001 = -15dB
00010 = -12dB
00011 = -9dB
00100 = -6dB
00101 = -3dB
00110 = 0dB (default)
00111 = 3dB
01000 = 6dB
01001 = 9dB
01010 = 12dB
01011 = 15dB
01100 = 18dB
01101 = 21dB
01110 = 24dB
01111 = 27dB
10000 = 30dB
10001 = 33dB
10010 = 36dB
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
PP, Rev 3.1, August 2009
WM8903
129