WM8599SEFTSLASHV datasheet(27/74 Pages) WOLFSON

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WM8599

PP Rev 1.0 January 2007

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 15 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.

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 16 De-emphasis Control

CLOCK SWITCHING

The input clocks to the DAC (DACMCLK, DACBCLK, DACLRCLK) can be switched if the DACs are

required to source data from multiple DSPs or application processors. Uncontrolled switching of

clocks is not recommended.

The WM8599 can be configured to ignore the clock inputs so that the clocks can be switched

externally. This means that the WM8599 is not affected by any glitches that arise as a result of

switching clocks. The DAC should be configured to ignore the input clocks for the duration of the

period taken to switch the clocks.

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

R38

DAC_CLK

26h

DAC_

SAFE_SW

DAC Clock Input Safe Switching

0 = Ignore DAC clock inputs

1 = Use DAC clock inputs

Table 17 DAC Clock Switching Control

ADC FEATURES

The WM8599 features a stereo 24-bit sigma-delta ADC with digital volume control with zero cross, a

selectable high pass filter to remove DC offsets, and support for both master and slave clocking

modes.

WM8599SEFT/V Datasheet(PDF) 27 Page - Wolfson Microelectronics plc

WM8599SEFT/V Datasheet(HTML) 27 Page - Wolfson Microelectronics plc

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