WM8581SEFT Wolfson Microelectronics Ltd., WM8581SEFT Datasheet - Page 34

• Manufacturer Part Number: WM8581SEFT
• Description: Multichannel Codec with S/pdif Transceiver
• Manufacturer: Wolfson Microelectronics Ltd.

WM8581
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Table 24 Digital Zero Cross Register
MUTE MODES
The WM8581 has individual mutes for each of the four DAC channels. Setting DMUTE for a channel
will apply a ‘soft-mute’ to the input of the digital filters for that channel. DMUTE[0] mutes DAC1
channel, DMUTE[1] mutes DAC2 channel, DMUTE[2] mutes DAC3 channel and DMUTE[3] mutes
DAC4 channel. Setting the MUTEALL register bit will apply a 'soft-mute’ to the input of all the DAC
digital filters.
The MUTE pin can also be used to apply soft-mute to the DAC selected by the DZFM register bits.
However, if the MPDENB register bit is set, the MUTE pin will activate a soft-mute for all DACs.
Table 25 Mute Registers
REGISTER ADDRESS
REGISTER ADDRESS
DAC CONTROL 5
DAC CONTROL 5
R19
13h
R19
13h
BIT
BIT
3:0
5
4
7
DZCEN
LABEL
DMUTE[3:0]
MUTEALL
MPDENB
LABEL
DEFAULT
0
DEFAULT
0000
0
0
DAC Digital Volume Zero Cross
Enable
0 = Zero Cross detect disabled
1 = Zero Cross detect enabled
DAC channel soft mute
enables:
DMUTE[0] = 1, enable soft-
mute on DAC1.
DMUTE[1] = 1, enable soft-
mute on DAC2.
DMUTE[2] = 1, enable soft-
mute on DAC3.
DMUTE[3] = 1, enable soft-
mute on DAC4.
DAC channel master soft mute.
Mutes all DAC channels:
0 = disable soft-mute on all
DACs.
1 = enable soft-mute on all
DACs.
MUTE pin decode enable:
0 = MUTE activates soft-mute
on DAC selected by DZFM
1 = MUTE activates softmute
on all DACs
DESCRIPTION
DESCRIPTION
PP Rev 1.0 March 2006
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