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WM8941 Datasheet(PDF) 32 Page - Wolfson Microelectronics plc

Part # WM8941
Description  Mono CODEC with Speaker Driver and Video Buffer
PDF  96 Pages
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Manufacturer  WOLFSON [Wolfson Microelectronics plc]
Direct Link  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8941 Datasheet(HTML) 32 Page - Wolfson Microelectronics plc

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WM8941
Pre Production
w
PP, Rev 3.3, December 2007
32
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
R42 (2Ah)
ALC Control 4
1
ALCZC
0 (zero cross
off)
ALC uses zero cross detection circuit.
0 = Disabled (recommended)
1 = Enabled
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 12 ALC Normal Mode Operation



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