Datasheet
PCM1741
13
SBAS175
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
OUT
L (x = 1) or V
OUT
R (x = 2).
Default Value: 0
DACx = 0 DAC Operation Enabled (default)
DACx = 1 DAC Operation Disabled
The DAC operation controls are used to enable and disable the DAC outputs, V
OUT
L and V
OUT
R. When
DACx = 0, the corresponding output will generate the audio waveform dictated by the data present on the
DATA pin. When DACx = 1, the corresponding output will be set to the bipolar zero level, or
V
CC
/2.
DM12 Digital De-Emphasis Function Control
Default Value: 0
DM12 = 0 De-Emphasis Disabled (default)
DM12 = 1 De-Emphasis Enabled
The DM12 bit is used to enable or disable the Digital De-Emphasis function. Refer to the Typical Performance
Curves of this data sheet for more information.
DMF[1:0] Sampling Frequency Selection for the De-Emphasis Function
Default Value: 00
DMF[1:0] De-Emphasis Same Rate Selection
00 44.1kHz (default)
01 48kHz
10 32kHz
11 Reserved
The DMF[1:0] bits are used to select the sampling frequency used for the Digital De-Emphasis function when
it is enabled.
B15 B14 B13 B12 B11 B10 B9 B8 B7 B6 B5 B4 B3 B2 B1 B0
REGISTER 20 0 IDX6 IDX5 IDX4 IDX3 IDX2 IDX1 IDX0 RSV RSV FLT RSV RSV FMT2 FMT1 FMT0
FMT[2:0] Audio Interface Data Format
Default Value: 101
The FMT[2:0] bits are used to select the data format for the serial audio interface. The following table shows
the available format options.
FMT[2:0] Audio Data Format Selection
000 24-Bit Standard Format, Right-Justified Data
001 20-Bit Standard Format, Right-Justified Data
010 18-Bit Standard Format, Right-Justified Data
011 16-Bit Standard Format, Right-Justified Data
100 I
2
S Format, 16- to 24-bits
101 Left-Justified Format, 16- to 24-Bits (default)
110 Reserved
111 Reserved