WM8595 datasheet(31/82 Pages) WOLFSON

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Production Data

WM8595

PD, Rev 4.2, January 2011

DIGITAL MONOMIX CONTROL

Each DAC can be independently set to output a range of mono and stereo options. Each DAC output

channel can output left channel data, right channel data or a mix of left and right channel data.

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

DAC1_CTRL1

02h

11:10

DAC1_OP

_MUX[1:0]

DAC1 Digital Monomix

00 = Stereo (Normal Operation)

01 = Mono (Left data to DAC1R)

10 = Mono (Right data to DAC1L)

11 = Digital Monomix, (L+R)/2

DAC2_CTRL1

07h

11:10

DAC2_OP

_MUX[1:0]

DAC2 Digital Monomix

00 = Stereo (Normal Operation)

01 = Mono (Left data to DAC2R)

10 = Mono (Right data to DAC2L)

11 = Digital Monomix, (L+R)/2

Table 19 Digital Monomix Control

DE-EMPHASIS

A digital de-emphasis filter may be applied to the DAC outputs when the sampling frequency is

44.1kHz. The de-emphasis filter for each DAC can be applied independently. The de-emphasis filter

responses and error can be seen in Figure 60 De-Emphasis Frequency Response (32kHz) and

Figure 61 De-Emphasis Error (32kHz).

Note: De-emphasis is not available when MCLK=192fs.

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

DAC1_CTRL1

02h

DAC1

_DEEMPH

DAC1 De-emphasis

0 = No de-emphasis

1 = Apply 44.1kHz de-emphasis

DAC2_CTRL1

07h

DAC2

_DEEMPH

DAC2 De-emphasis

0 = No de-emphasis

1 = Apply 44.1kHz de-emphasis

Table 20 De-emphasis Control

SIMULATANEOUS DAC1 AND DAC2 CONTROL

If the same settings are required to both DAC1 and DAC2, it is possible to have the register settings

of DAC2 copy the register settings made to DAC1. To use this feature, the user must ensure that

DAC2_COPY_DAC1 is set before writes are made to DAC1. Any writes then made to R2-6 are

automatically made to R7-11.

Example (When DAC2_COPY_DAC1=1):

ACTUAL REGISTER SETTING

R2 = 0x0001

R2 = 0x0001 & R7 = 0x0001

R3 = 0x0023

R3 = 0x0023 & R8 = 0x0023

R4 = 0x0045

R4 = 0x0045 & R9 = 0x0045

R5 = 0x0067

R5 = 0x0067 & R10 = 0x0067

R6 = 0x0089

R6 = 0x0089 & R11 = 0x0089

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

R12

ENABLE

0Bh

DAC2_

COPY_

DAC1

DAC2 Configuration Control

0 = DAC2 settings independent of DAC1

1 = DAC2 settings are the same as DAC1

Table 21 DAC2 Configuration Control

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