PCM1753
PCM1754
PCM1755
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SLES092A – OCTOBER 2003 – REVISED AUGUST 2004
By setting MUTx = 0, the attenuator is increased one step for every 8/f seconds to the previously programmed
S
attenuation level.
OVER: Oversampling Rate Control
Default value: 0
System clock rate = 256 f , 384 f , 512 f , 768 f or 1152 f :
S
S
S
S,
S
OVER = 0
OVER = 1
64× oversampling (default)
128× oversampling
System clock rate = 128 f or 192 f :
S
S
OVER = 0
OVER = 1
32× oversampling (default)
64× oversampling
The OVER bit is used to control the oversampling rate of the delta-sigma D/A converters. The OVER = 1 setting
is recommended when the sampling rate is 192 kHz (system clock rate is 128 f or 192 f ).
S
S
SRST: Reset
Default value: 0
SRST = 0
SRST = 1
Reset disabled (default)
Reset enabled
The SRST bit is used to enable or disable the soft reset function. The operation is the same as power-on reset.
All registers are initialized.
B15
B14
B13
B12
B11
B10
B9
B8
B7
B6
B5
B4
B3
B2
B1
B0
Register 19
0
IDX6 IDX5 IDX4 IDX3 IDX2 IDX1 IDX0
RSV
DMF1 DMF0 DM12 RSV
RSV
DAC2 DAC1
DACx: DAC Operation Control
Where x = 1 or 2, corresponding to the DAC output V
Default value: 0
L (x = 1) or V R (x = 2).
OUT OUT
DACx = 0
DACx = 1
DAC operation enabled (default)
DAC operation disabled
The DAC operation controls are used to enable and disable the DAC outputs, V
L and V
OUT
R. When
OUT
DACx = 0, the corresponding output generates the audio waveform dictated by the data present on the DATA
pin. When DACx = 1, the corresponding output is set to the bipolar zero level, or 0.5 V
DM12: Digital De-Emphasis Function Control
Default value: 0
.
CC
DM12 = 0
DM12 = 1
De-emphasis disabled (default)
De-emphasis enabled
The DM12 bit is used to enable or disable the digital de-emphasis function. See the plots shown in the Typical
Performance Curves section of this data sheet.
21
BB [ BURR-BROWN CORPORATION ]
