WM8941GEFL WOLFSON [Wolfson Microelectronics plc], WM8941GEFL Datasheet - Page 32
WM8941GEFL
Manufacturer Part Number
WM8941GEFL
Description
Mono CODEC with Speaker Driver and Video Buffer
Manufacturer
WOLFSON [Wolfson Microelectronics plc]
Datasheet
1.WM8941GEFL.pdf
(96 pages)
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Figure 12 ALC Normal Mode Operation
Table 20 ALC Control Registers
NORMAL MODE
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.
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.
R42 (2Ah)
ALC Control 4
REGISTER
ADDRESS
1
BIT
ALCZC
LABEL
0 (zero cross
off)
DEFAULT
ALC uses zero cross detection circuit.
0 = Disabled (recommended)
1 = Enabled
DESCRIPTION
PP, Rev 3.3, December 2007
Pre Production
32
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