WM8777
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L/RDAX[7:0]
ATTENUATION LEVEL
00(hex)
-∞ dB (mute)
01(hex)
-127.5dB
:
:
:
:
:
:
FE(hex)
FF(hex)
-0.5dB
0dB
Table 63 Digital Volume Control Attenuation Levels
The Digital volume control also incorporates a zero cross detect circuit which detects a transition
through the zero point before updating the digital volume control with the new volume. This is
enabled by control bit DZCEN.
REGISTER ADDRESS
(15h)
BIT
LABEL
DEFAULT
DESCRIPTION
0
DZCEN
0
DAC Digital Volume Zero Cross
Enable:
DAC Attenuation Control
0 = Zero Cross detect disabled
1 = Zero Cross detect enabled
Table 64 Digital Zero Cross Register
DAC OUTPUT PHASE
The DAC Phase control word determines whether the output of each DAC is non-inverted or inverted
REGISTER ADDRESS
(14h)
BIT
LABEL
DEFAULT
DESCRIPTION
7:0
PHASE
[7:0]
00000000
Controls phase of DAC outputs
DAC Output Phase
PHASE[0] = 1 inverts phase of
DAC1L output
PHASE[1] = 1 inverts phase of
DAC1R output
PHASE[2] = 1 inverts phase of
DAC2L output
PHASE[3] = 1 inverts phase of
DAC2R output
PHASE[4] = 1 inverts phase of
DAC3L output
PHASE[5] = 1 inverts phase of
DAC3R output
PHASE[6] = 1 inverts phase of
DAC4L output
PHASE[7] = 1 inverts phase of
DAC4R output
Table 65 DAC Output Phase Register
PP Rev 1.94 November 2004
64
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