WM8510 Datasheet, PDF (25/56 Pages) Wolfson Microelectronics plc – MONO CODEC WITH SPEAKER DRIVER

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R34
8
ALC Control
3
ALCMODE
7:4 ALCDCY
[3:0]
3:0 ALCATK
[3:0]
Table 8 ALC Control Registers
WM8510
0
0011
(13ms/6dB)
0011
(2.9ms/6dB)
0010
(832us/6dB)
0010
(182us/6dB)
Determines the ALC mode of
operation:
0=ALC mode
1=Limiter mode.
Decay (gain ramp-up) time
(ALCMODE =0)
Per
Per
90% of
step
6dB
range
0000 410us 3.3ms 24ms
0001 820us 6.6ms 48ms
0010 1.64ms 13.1ms 192ms
… (time doubles with every step)
1010
or
higher
420ms
3.36s
24.576s
Decay (gain ramp-up) time
(ALCMODE =1)
Per
Per
90% of
step
6dB
range
0000 90.8us 726.4us 5.26ms
0001 181.6us 1.453ms 10.53ms
0010 363.2us 2.905ms 21.06ms
… (time doubles with every step)
1010 93ms 744ms 5.39s
ALC attack (gain ramp-down) time
(ALCMODE = 0)
Per
Per
90% of
step
6dB
range
0000 104us 832us 6ms
0001 208us 1.664ms 12ms
0010 416us 3.328ms 24.1ms
… (time doubles with every step)
1010
or
higher
106ms
852ms
6.18s
ALC attack (gain ramp-down) time
(ALCMODE = 1)
Per
Per
90% of
step
6dB
range
0000 22.7us 182.4us 1.31ms
0001 45.4us 363.2us 2.62ms
0010 90.8us 726.4us 5.26ms
… (time doubles with every step)
1010 23.2ms 186ms 1.348s
w
PP Rev 1.2 December 2004
25