WM8980CGEFL/RV WOLFSON [Wolfson Microelectronics plc], WM8980CGEFL/RV Datasheet - Page 105

• Manufacturer Part Number: WM8980CGEFL/RV
• Description: Stereo CODEC with Speaker Driver and Video Buffer
• Manufacturer: WOLFSON [Wolfson Microelectronics plc]

Pre-Production
w
34 (22h)
35 (23h)
REGISTER
ADDRESS
3:0
8
7:4
3:0
8:4
BIT
ALCLVL
ALCMODE
ALCDCY
[3:0]
ALCATK
LABEL
1011
0
0011
0011
0010
0010
00000
DEFAULT
ALC target – sets signal level at ADC input
1111 : -1.5dBFS
1110 : -1.5dBFS
1101 : -3dBFS
1100 : -4.5dBFS
...... (-1.5dB steps)
0001 : -21dBFS
0000 : -22.5dBFS
Determines the ALC mode of operation:
0=ALC mode
1=Limiter mode
Decay (gain ramp-up) time
(ALCMODE ==0)
0000
0001
0010
… (time doubles with every step)
1010 or
higher
Decay (gain ramp-up) time
(ALCMODE ==1)
0000
0001
0010
… (time doubles with every step)
1010
ALC attack (gain ramp-down) time
(ALCMODE == 0)
0000
0001
0010
… (time doubles with every step)
1010 or
higher
ALC attack (gain ramp-down) time
(ALCMODE == 1)
0000
0001
0010
… (time doubles with every step)
1010
Reserved
Per step
410us
820us
1.64ms
420ms
Per step
90.8us
182us
363us
93ms
Per step
104us
208us
416us
106ms
Per step
22.7us
45.4us
90.8us
23.2ms
DESCRIPTION
Per 6dB
3.28ms
6.56ms
13.1ms
3.36s
Per 6dB
726us
1.45ms
2.91ms
744ms
Per 6dB
832us
1.66ms
3.33ms
852ms
Per 6dB
182us
363us
726us
186ms
90% of
range
23.6ms
47.2ms
94.5ms
24.2s
90% of
range
5.23ms
10.5ms
20.9ms
5.39s
90% of
range
6ms
12ms
24ms
6.13s
90% of
range
1.31ms
2.62ms
5.23ms
1.34s
PP, Rev 3.8, May 2012
Input Limiter/
Automatic
Level Control
(ALC)
Input Limiter/
Automatic
Level Control
(ALC)
Input Limiter/
Automatic
Level Control
(ALC)
Input Limiter/
Automatic
Level Control
(ALC)
REFER TO
WM8980
105