WM8983GEFL/RV Wolfson Microelectronics, WM8983GEFL/RV Datasheet - Page 46

• Manufacturer Part Number: WM8983GEFL/RV
• Description: Audio CODECs Mbl Multimedia CODEC w/ 1W Speaker Driver
• Manufacturer: Wolfson Microelectronics

Specifications of WM8983GEFL/RV

• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: QFN-32
• Minimum Operating Temperature: - 25 C

WM8983
Figure 23 ALC Normal Mode Operation
w
Table 19 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.
REGISTER
ADDRESS
BIT
LABEL
0010
(182us/6dB)
DEFAULT
ALC attack (gain ramp-down) time
(ALCMODE == 1)
0000
0001
0010
… (time doubles with every step)
1010
Per
step
22.7us
45.4us
90.8us
23.2ms
DESCRIPTION
PD Rev 4.0 November 2006
Per
6dB
182.4us
363.2us
726.4us
186ms
Production Data
90% of
range
1.31ms
2.62ms
5.26ms
1.348s
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