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WM8985GEFL/R датащи(PDF) 104 Page - Wolfson Microelectronics plc

номер детали WM8985GEFL/R
подробное описание детали  Multimedia CODEC with Class D Headphone and Line Out
PDF  121 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) 104 Page - Wolfson Microelectronics plc

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WM8985
Production Data
w
PD, Rev 4.6, July 2009
104
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
REFER TO
34 (22h)
8
ALCMODE
0
Determines the ALC mode of operation:
0=ALC mode
1=Limiter mode
Input Limiter/
Automatic
Level Control
(ALC)
7:4
ALCDCY
[3:0]
0011
Decay (gain ramp-up) time
(ALCMODE ==0)
Input Limiter/
Automatic
Level Control
(ALC)
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)
1010
or
higher
420ms
3.36s
24.576s
0011
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
10.53ms
0010
363.2us
2.905ms
21.06ms
… (time doubles with every step)
1010
93ms
744ms
5.39s
3:0
ALCATK
0010
ALC attack (gain ramp-down) time
(ALCMODE == 0)
Input Limiter/
Automatic
Level Control
(ALC)
Per step
Per 6dB
90% of 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
0010
ALC attack (gain ramp-down) time
(ALCMODE == 1)
Per step
Per 6dB
90% of 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
35 (23h)
8:4
00000
Reserved. Initialise to 0
3
NGEN
0
ALC Noise gate function enable
1 = enable
0 = disable
Input Limiter/
Automatic
Level Control
(ALC)
2:0
NGTH
000
ALC Noise gate threshold:
000=-39dB
001=-45dB
010=-51db
… (6dB steps)
111=-81dB
Input Limiter/
Automatic
Level Control
(ALC)
36 (24h)
8:5
0000
Reserved. Initialise to 0



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