WM8742GEDSSLASHV datasheet(34/66 Pages) CIRRUS

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WM8742

Rev 4.4

DSD PLUS GAIN CONTROL

The gain in the DSD Plus data path can be adjusted.

The default setting provides a 1.4Vrms

differential output level.

BIT

LABEL

DEFAULT

DESCRIPTION

Mode Control 2

08h

DSD_

GAIN

DSD Plus gain control:

0 = Low gain, 1.4Vrms differential

output level

1 = High gain, 2.0Vrms differential

output level

Table 30 DSD Plus Gain Control

MUTE MODES

0.000

0.020

0.040

0.060

0.080

0.100

0.120

0.140

Time (s)

Figure 24 Application and Release of Soft Mute

Figure 24 shows the application and release of SOFTMUTE for a full amplitude sinusoid being played

at 48kHz sampling rate. When SOFTMUTE (lower trace) is asserted, the WM8742 output (upper

trace) begins to decay exponentially from the DC level of the last input sample. The output decays

towards VMID in 1022x4/fs seconds. When SOFTMUTE is de-asserted, the signal gain will return to its

previous value.

BIT

LABEL

DEFAULT

DESCRIPTION

PCM Control

04h

SOFTMUTE

Soft mute select

0 = Normal operation

1 = Soft mute both channels

Table 31 Soft Mute Control

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