WM8980 datasheet(21/81 Pages) WOLFSON

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WM8980

PP Rev 1.6 January 2005

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

R47

Left Input

BOOST

control

PGABOOSTL

Boost enable for left channel input

PGA:

0 = PGA output has +0dB gain

through input BOOST stage.

1 = PGA output has +20dB gain

through input BOOST stage.

R48

Right Input

BOOST

control

PGABOOSTR

Boost enable for right channel input

PGA:

0 = PGA output has +0dB gain

through input BOOST stage.

1 = PGA output has +20dB gain

through input BOOST stage.

Table 5 Input BOOST Stage Control

The Auxilliary amplifier path to the BOOST stages is controlled by the AUXL2BOOSTVOL[2:0] and

AUXR2BOOSTVOL[2:0] register bits.

When AUXL2BOOSTVOL/AUXR2BOOSTVOL=000 this path

is completely disconnected from the BOOST stage. Settings 001 through to 111 control the gain in

3dB steps from -12dB to +6dB.

The L2/R2 path to the BOOST stage is controlled by the LIP2BOOSTVOL[2:0] and the

RIP2BOOSTVOL[2:0] register bits. When L2_2BOOSTVOL/R2_2BOOSTVOL=000 the L2/R2 input

pin is completely disconnected from the BOOST stage. Settings 001 through to 111 control the gain

in 3dB steps from -12dB to +6dB.

WM8980 Datasheet(PDF) 21 Page - Wolfson Microelectronics plc