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WM8985GEFL/R датащи(PDF) 43 Page - Wolfson Microelectronics plc

номер детали WM8985GEFL/R
подробное описание детали  Multimedia CODEC With Class D Headphone and Line Out
PDF  118 Pages
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производитель  WOLFSON [Wolfson Microelectronics plc]
домашняя страница  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8985GEFL/R датащи(HTML) 43 Page - Wolfson Microelectronics plc

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Pre-Production
WM8985
w
PP, Rev 3.4, October 2006
43
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
0000 = -22.5dBFS
7:4
ALCHLD
[3:0]
0000
(0ms)
ALC hold time before gain is
increased.
0000 = 0ms
0001 = 2.67ms
0010 = 5.33ms
0011 = 10.66ms
0100 = 21.32ms
0101 = 42.64ms
0110 = 85.28ms
0111 = 0.17s
1000 = 0.34s
1001 = 0.68s
1010 or higher = 1.36s
8
ALCMODE
0
Determines the ALC mode of
operation:
0 = ALC mode (Normal Operation)
1 = Limiter mode.
Decay (gain ramp-up) time
(ALCMODE ==0)
Per
step
Per
6dB
90% of
range
0000
410us
3.3ms
24ms
0001
820us
6.6ms
48ms
0010
1.64ms
13.1ms
192ms
… (time doubles with every step)
0011
(13ms/6dB)
1010
or
higher
420ms
3.36s
24.576s
Decay (gain ramp-up) time
(ALCMODE ==1)
Per
step
Per
6dB
90% of
range
0000
90.8us
726.4us
5.26ms
0001
181.6us
1.453ms
10.53
ms
0010
363.2us
2.905ms
21.06
ms
… (time doubles with every step)
7:4
ALCDCY
[3:0]
0011
(2.9ms/6dB)
1010
93ms
744ms
5.39s
ALC attack (gain ramp-down) time
(ALCMODE == 0)
Per
step
Per
6dB
90% of
range
0000
104us
832us
6ms
0001
208us
1.66ms
12ms
0010
416us
3.32ms
24.1ms
… (time doubles with every step)
0010
(832us/6dB)
1010
or
higher
106ms
852ms
6.18s
ALC attack (gain ramp-down) time
(ALCMODE == 1)
Per
step
Per
6dB
90% of
range
R34 (22h)
ALC Control
3
3:0
ALCATK
[3:0]
0010
(182us/6dB)
0000
22.7us
182.4us
1.31ms



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