WM8753LEBSLASHRV datasheet(44/87 Pages) WOLFSON

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Advanced Information

WM8753L

AI Rev 3.1 June 2004

MONO1 OUTPUT

The MONO1 pin can drive a mono line output. The signal volume on MONO1 can be adjusted under

software control by writing to MONO1VOL.

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

6:0

MONO1VOL

[6:0]

1111001

(0dB)

MONO1 Volume

1111111 = +6dB

… (1.0 dB steps)

0110000 = -73dB

0101111

0000000

Analogue

MUTE

R44 (2Ch)

MONOOUT

Volume

MOZC

MONO1 zero cross enable

1 = Change gain on zero cross only

0 = Change gain immediately

Table 37 MONO1 Volume Control

MONO2

The MONO2 pin can drive a mono line output and may be configured to output either an inverted

MONO1 output, the output from the left or right mixer or a mono mix of the left and right mixer

outputs.

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

R45 (2Dh)

Output

Control

8:7

MONO2SW[1:0]

MONO2 Output Select

00 = inverted MONO1

01 = Left Mix / 2

10 = Right Mix / 2

11 = (Left Mix + Right Mix ) / 2

Table 38 MONO2 Output Select

OUT3 OUTPUT

The OUT3 pin can drive a 16

Ω or 32Ω headphone or a line output or be used as a DC reference for a

headphone output (see Headphone Output section). It can be selected to either drive out an inverted

ROUT2 or mono mix of the left and right mixers for e.g. an earpiece drive between OUT3 and LOUT1

or differential output between OUT3 and MONOOUT. This output is enabled by setting bit OUT3.

OUT3SW[1:0] selects the mode of operation required.

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

R45 (2Dh)

Output

Control

1:0

OUT3SW

[1:0]

OUT3 select

00 = VREF

01 = ROUT2 signal

(volume controlled by ROUT2VOL)

10 = (Left Mixer + Right Mixer) / 2

11 = unused

Table 39 OUT3 Select

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