WM8961
Pre-Production
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
ALC Function Select
00 : ALC off (PGA gain set by register)
01 : Right channel only
R17 (11h)
ALC1
8:7
ALCSEL[1:0]
00
10: Left channel only
11 : Stereo (PGA registers unused). Note: ensure that LINVOL and
RINVOL settings are the same before entering this mode.
6:4
MAXGAIN[2:0]
111
ALC Max Gain
000 : -18dB
001 : -12dB
010 : -6dB
011 : 0dB
100 : 6dB
101 : 12dB
110 : 18dB
111 : 24dB
ALC Target Level (dB FS)
0000 : -28.5
3:0
ALCL[3:0]
1011
0001 : -27
…1.5dB steps…
1111 : -6
Register 11h ALC1
REGISTER
ADDRESS
BIT
6:4
LABEL
DEFAULT
DESCRIPTION
Min gain setting
000 : -23.25dB
001 : -17.25dB
010 : -11.25dB
011 : -5.25dB
100 : +0.75dB
101 : +6.75dB
110 : +12.75dB
111 : +18.75dB
R18 (12h)
ALC2
MINGAIN[2:0]
000
3:0
HLD[3:0]
0000
ALC Hold time
0000 : 0ms
0001 : 2.67ms
0010 : 5.33ms
Doubling with each step up to…
1111 : 43.691s
Register 12h ALC2
PP, August 2009, Rev 3.1
w
89
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
