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WM8962B Datasheet(PDF) 89 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) 89 Page - Wolfson Microelectronics plc

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WM8962
Rev 4.3
89
DRC DYNAMIC CHARACTERISTICS
The dynamic behaviour determines how quickly the DRC responds to changing signal levels. Note
that the DRC responds to the average (RMS) signal amplitude over a period of time.
The DRC_ATK determines how quickly the DRC gain decreases when the signal amplitude is high.
The DRC_DCY determines how quickly the DRC gain increases when the signal amplitude is low.
These register fields are described in Table 16. Note that the register defaults are suitable for general
purpose microphone use.
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
R277 (0115h)
DRC Control 2
12:9
DRC_ATK [3:0]
0100
Gain attack rate (seconds/6dB)
0000 = Reserved
0001 = 181us
0010 = 363us
0011 = 726us
0100 = 1.45ms
0101 = 2.9ms
0110 = 5.8ms
0111 = 11.6ms
1000 = 23.2ms
1001 = 46.4ms
1010 = 92.8ms
1011 = 185.6ms
1100-1111 = Reserved
8:5
DRC_DCY [3:0]
1001
Gain decay rate (seconds/6dB)
0000 = 1.45ms
0001 = 2.9ms
0010 = 5.8ms
0011 = 11.6ms
0100 = 23.25ms
0101 = 46.5ms
0110 = 93ms
0111 = 186ms
1000 = 372ms
1001 = 743ms (default)
1010 = 1.49s
1011 = 2.97s
1100 = 5.94s
1101 = 11.89s
1110 = 23.78s
1111 = 47.56s
Table 42 DRC Time Constants



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