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WM8978GEFL/V Fiches technique(PDF) 42 Page - Wolfson Microelectronics plc

No de pièce WM8978GEFL/V
Description  Stereo CODEC With Speaker Driver
PDF  119 Pages
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Fabricant  WOLFSON [Wolfson Microelectronics plc]
Site Internet  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8978GEFL/V Fiches technique(HTML) 42 Page - Wolfson Microelectronics plc

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WM8978
Pre-Production
w
PP Rev 3.0 May 2006
42
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
0000
22.7us
182.4us
1.31ms
0001
45.4us
363us
2.62ms
0010
90.8us
726us
5.23ms
… (time doubles with every step)
1010
or
higher
23.2ms
186ms
1.34s
Table 20 ALC Control Registers
When the ALC is disabled, the input PGA remains at the last controlled value of the ALC. An input
gain update must be made by writing to the INPPGAVOLL/R register bits.
NORMAL MODE
In normal mode, the ALC will attempt to maintain a constant signal level by increasing or decreasing
the gain of the PGA. The following diagram shows an example of this.
Figure 19 ALC Normal Mode Operation



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