Datasheet
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ADPSV: ADC Power-Save Control (ADC)
DAPSV: DAC Power-Save Control (DAC)
OVR1: Oversampling Rate Control (DAC)
MUTx: Soft-Mute Control (DAC)
PCM3052A
SLES160 – NOVEMBER 2005
SRST = 0 Re-synchronization
SRST = 1 Normal operation (default)
The SRST bit controls system reset. The PCM3052A does not go into power-down state. The mode control
register is not reset by this control. Also pop-noise may be generated.
Default value: 0
ADPSV = 0 Normal operation (default)
ADPSV = 1 Power-save mode
The ADPSV bit controls ADC power-save mode. In power-save mode, ADC goes into power-down state, the
data in ADC are reset, and DOUT is forced into ZERO immediately. I
2
C control is enabled.
Default value: 0
DAPSV = 0 Normal operation (default)
DAPSV = 1 Power-save mode
The DAPSV bit controls the DAC power-save mode. In the power-save mode, the DAC output is faded out and
DAC goes into the power-down state. I
2
C control is enabled. A waiting time of more than 2100/f
S
from
power-save-mode assertion is required for the release of the power-save mode.
DIT function is available if SPDIF bit = 1, even though DAPSV = 1.
B15 B14 B13 B12 B11 B10 B9 B8 B7 B6 B5 B4 B3 B2 B1 B0
REGISTER 68 0 1 0 0 0 1 0 0 RSV OVR1 RSV RSV RSV RSV MUT2 MUT1
Default value: 0
OVR1 = 0 64 × oversampling (default)
OVR1 = 1 128 × oversampling
The OVR1 bit is used to control the oversampling rate of the delta-sigma D/A converters. To write over this
register during normal operation may generate noise.
where, x = 1 or 2, corresponding to the DAC output V
OUT
L (x = 1) and V
OUT
R (x = 2).
Default value: 0
MUTx = 0 Mute disabled (default)
MUTx = 1 Mute enabled
The mute bits, MUT1 and MUT2, are used to enable or disable the soft-mute function for the corresponding DAC
outputs, V
OUT
L and V
OUT
R. The soft-mute function is incorporated into the digital attenuators. When mute is
disabled (MUTx = 0), the attenuator and DAC operate normally. When mute is enabled by setting MUTx = 1, the
digital attenuator for the corresponding output is decreased from the current setting to infinite attenuation, one
attenuator step (0.5 dB) for every 8/f
S
seconds. This provides pop-free muting of the DAC output.
By setting MUTx = 0, the attenuator is increased one step for every 8/f
S
seconds to the previously programmed
attenuation level.
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