WM8985
Pre-Production
REGISTER
ADDRESS
BIT
LABEL
LIMATK
DEFAULT
DESCRIPTION
R24 (18h)
3:0
0010
Limiter Attack time (per 6dB gain
change) for 44.1kHz sampling. Note
that these are proportionally related to
sample rate.
DAC digital
limiter control
1
0000 = 94us
0001 = 188s
0010 = 375us
0011 = 750us
0100 = 1.5ms
0101 = 3ms
0110 = 6ms
0111 = 12ms
1000 = 24ms
1001 = 48ms
1010 = 96ms
1011 to 1111 = 192ms
7:4
LIMDCY
0011
Limiter Decay time (per 6dB gain
change) for 44.1kHz sampling. Note
that these are proportionally related to
sample rate:
0000 = 750us
0001 = 1.5ms
0010 = 3ms
0011 = 6ms
0100 = 12ms
0101 = 24ms
0110 = 48ms
0111 = 96ms
1000 = 192ms
1001 = 384ms
1010 = 768ms
1011 to 1111 = 1.536s
Enable the DAC digital limiter:
0=disabled
8
LIMEN
0
1=enabled
R25 (19h)
3:0
LIMBOOST
0000
Limiter volume boost (can be used as a
stand alone volume boost when
LIMEN=0):
DAC digital
limiter control
2
0000 = 0dB
0001 = +1dB
0010 = +2dB
0011 = +3dB
0100 = +4dB
0101 = +5dB
0110 = +6dB
0111 = +7dB
1000 = +8dB
1001 = +9dB
1010 = +10dB
1011 = +11dB
1100 = +12dB
1101 to 1111 = reserved
PP, Rev 3.4, October 2006
58
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WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
