WM8976 Ver la hoja de datos (PDF) - Wolfson Microelectronics plc

Número de pieza

componentes Descripción

Fabricante

WM8976

Stereo CODEC With Speaker Driver

Wolfson Microelectronics plc 

Pre-Production

REGISTER BIT

ADDRESS

LABEL

DEFAULT

WM8976

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 17 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 11 ALC Normal Mode Operation

w

PP Rev 3.0 April 2006

31

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