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WM8994ECS/R Datenblatt(PDF) 111 Page - Cirrus Logic

Teilenummer WM8994ECS/R
Bauteilbeschribung  Multi-channel Audio Hub CODEC for Smartphones
PDF  363 Pages
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Hersteller  CIRRUS [Cirrus Logic]
Direct Link  http://www.cirrus.com
Logo CIRRUS - Cirrus Logic

WM8994ECS/R Datenblatt(HTML) 111 Page - Cirrus Logic

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WM8994
Rev 4.6
111
The DAC Soft Mute register controls are defined in Table 52.
The volume ramp rate during soft mute and un-mute is controlled by the DAC_MUTERATE bit. Ramp
rates of fs/32 and fs/2 are selectable. The ramp rate determines the rate at which the volume will be
increased or decreased. Note that the actual ramp time depends on the extent of the difference
between the muted and un-muted volume settings.
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
R1556 (0614h)
DAC Softmute
1
DAC_SOFT
MUTEMODE
0
DAC Unmute Ramp select
0 = Disabling soft-mute
(DAC[1/2][L/R]_MUTE=0) will cause
the DAC volume to change
immediately to DAC[1/2][L/R]_VOL
settings
1 = Disabling soft-mute
(DAC[1/2][L/R]_MUTE=0) will cause
the DAC volume to ramp up gradually
to the DAC[1/2][L/R]_VOL settings
0
DAC_MUTE
RATE
0
DAC Soft Mute Ramp Rate
0 = Fast ramp (fs/2, maximum ramp
time is 10.7ms at fs=48k)
1 = Slow ramp (fs/32, maximum ramp
time is 171ms at fs=48k)
(Note: ramp rate scales with sample
rate.)
Table 52 DAC Soft-Mute Control



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