WM8980CGEFL/RV WOLFSON [Wolfson Microelectronics plc], WM8980CGEFL/RV Datasheet - Page 37

• Manufacturer Part Number: WM8980CGEFL/RV
• Description: Stereo CODEC with Speaker Driver and Video Buffer
• Manufacturer: WOLFSON [Wolfson Microelectronics plc]

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Table 18 ALC Control Registers
NORMAL MODE
Figure 17 ALC Normal Mode Operation
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.
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
0000
0001
0010
… (time doubles with every step)
1010
or
higher
Per
step
22.7us
45.4us
90.8us
23.2ms
DESCRIPTION
PP, Rev 3.8, May 2012
Per
6dB
182us
363us
726us
186ms
WM8980
90% of
range
1.31ms
2.62ms
5.23ms
1.34s
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