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WM8777
DAC DIGITAL VOLUME CONTROL
The DAC volume may also be adjusted in the digital domain using independent digital attenuation
control registers
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
(0Bh)
7:0
LDA1[7:0]
11111111
(0dB)
Digital Attenuation control for DAC1 Left Channel (LSUMOP) in
0.5dB steps. See Table 63
Digital
Attenuation
DACL1
8
UPDATE
Not latched
Controls simultaneous update of all Attenuation Latches
0 = Store LDA1 in intermediate latch (no change to output)
1 = Store LDA1 and update attenuation on all channels
(0Ch)
7:0
8
RDA1[6:0]
UPDATE
11111111
(0dB)
Digital Attenuation control for DAC1 Right Channel (RSUMOP) in
0.5dB steps. See Table 63
Digital
Attenuation
DACR1
Not latched
Controls simultaneous update of all Attenuation Latches
0 = Store RDA1 in intermediate latch (no change to output)
1 = Store RDA1 and update attenuation on all channels.
(0Dh)
7:0
8
LDA2[7:0]
UPDATE
11111111
(0dB)
Digital Attenuation control for DAC2 Left Channel (CNTSOP) in
0.5dB steps. See Table 63
Digital
Attenuation
DACL2
Not latched
Controls simultaneous update of all Attenuation Latches
0 = Store LDA2 in intermediate latch (no change to output)
1 = Store LDA2 and update attenuation on all channels.
(0Eh)
7:0
8
RDA2[7:0]
UPDATE
11111111
(0dB)
Digital Attenuation control for DAC2 Right Channel (LFESOP) in
0.5dB steps. See Table 63
Digital
Attenuation
DACR2
Not latched
Controls simultaneous update of all Attenuation Latches
0 = Store RDA2 in intermediate latch (no change to output)
1 = Store RDA2 and update attenuation on all channels.
(0Fh)
7:0
8
LDA3[7:0]
UPDATE
11111111
(0dB)
Digital Attenuation control for DAC3 Left Channel (LSURSOP) in
0.5dB steps. See Table 63
Digital
Attenuation
DACL3
Not latched
Controls simultaneous update of all Attenuation Latches
0 = Store LDA3 in intermediate latch (no change to output)
1 = Store LDA3 and update attenuation on all channels.
(10h)
7:0
8
RDA3[7:0]
UPDATE
11111111
(0dB)
Digital Attenuation control for DAC3 Right Channel (RSURSOP) in
0.5dB steps. See Table 63
Digital
Attenuation
DACR3
Not latched
Controls simultaneous update of all Attenuation Latches
0 = Store RDA3 in intermediate latch (no change to output)
1 = Store RDA3 and update attenuation on all channels.
(11h)
7:0
8
LDA4[7:0]
UPDATE
11111111
(0dB)
Digital Attenuation control for DAC4 Left Channel (LAUXSOP) in
0.5dB steps. See Table 63
Digital
Attenuation
DACL4
Not latched
Controls simultaneous update of all Attenuation Latches
0 = Store LDA4 in intermediate latch (no change to output)
1 = Store LDA4 and update attenuation on all channels.
(12h)
7:0
8
RDA4[7:0]
UPDATE
11111111
(0dB)
Digital Attenuation control for DAC4 Right Channel (RAUXSOP) in
0.5dB steps. See Table 63
Digital
Attenuation
DACR4
Not latched
Controls simultaneous update of all Attenuation Latches
0 = Store RDA4 in intermediate latch (no change to output)
1 = Store RDA4 and update attenuation on all channels.
(13h)
7:0
8
MASTDA[7:0]
UPDATE
11111111
(0dB)
Digital Attenuation control for all DAC channels in 0.5dB steps. See
Table 63
Digital
Attenuation
Not latched
Controls simultaneous update of all Attenuation Latches
0 = Store gain in intermediate latch (no change to output)
1 = Store gain and update attenuation on all channels.
Master
(all channels)
Table 62 Digital Attenuation Registers
PP Rev 1.94 November 2004
63
w
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
