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WM8962B Datasheet(PDF) 218 Page - Wolfson Microelectronics plc

Part # WM8962B
Description  Ultra-Low Power Stereo CODEC with Audio Enhancement DSP, 1W Stereo Class D Speaker Drivers and Ground Referenced Headphone Drivers
PDF  295 Pages
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Manufacturer  WOLFSON [Wolfson Microelectronics plc]
Direct Link  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8962B Datasheet(HTML) 218 Page - Wolfson Microelectronics plc

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WM8962
218
Rev 4.3
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
R19 (13h)
ALC3
12:10
ALC_NGATE_G
AIN [2:0]
111
Noise Gate Gain level. This is the PGA gain level used
within the ALC Noise Gate function.
000 = -23.25dB
001 = -18dB
010 = -12dB
011 = -6dB
100 = 0dB
101 = +6dB
110 = +12dB
111 = +18dB
8
ALC_MODE
0
ALC Mode
0 = Normal ALC Mode
1 = Limiter Mode
Note that ALCL_ENA and ALCR_ENA must both be set to
0 before changing ALC_MODE, otherwise unexpected
behaviour may result.
7:4
ALC_DCY [3:0]
0011
Sets the Gain Decay Rate (measured in time per 1.5dB
step).
If ALC_MODE = 0
0000 = 0.41ms / step
0001 = 0.82ms / step
…doubling with each step to…
1010 = 420ms / step
1011 = 840ms / step
1100 to 1111 = Reserved
If ALC_MODE = 1
0000 = 0.082ms / step
0001 = 0.164ms / step
…doubling with each step to…
1010 = 83.9ms / step
1011 = 168ms / step
1100 to 1111 = Reserved
Note that when 88.2kHz or 96kHz sample rate is selected,
the Gain Decay time is defined as for the ALC_MODE=0
case above.
3:0
ALC_ATK [3:0]
0010
Sets the Gain Attack Rate (measured in time per 1.5dB
step).
If ALC_MODE = 0
0000 = 0.104ms / step
0001 = 0.208ms / step
…doubling with each step to…
1010 = 106ms / step
1011 to 1111 = Reserved
If ALC_MODE = 1
0000 = 0.020ms / step
0001 = 0.041ms / step
…doubling with each step to…
1010 = 21.0ms / step
1011 to 1111 = Reserved
Note that when 88.2kHz or 96kHz sample rate is selected,
the Gain Attack time is defined as for the ALC_MODE=0
case above.
Register 13h ALC3



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