PCM1753
PCM1754
PCM1755
SLES092A – OCTOBER 2003 – REVISED AUGUST 2004
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DMF[1:0]: Sampling Frequency Selection for the De-Emphasis Function
Default value: 00
The DMF[1:0] bits are used to select the sampling frequency used for the digital de-emphasis function when
it is enabled.
DMF[1:0]
De-Emphasis Sample Rate Selection
00
01
10
11
44.1 kHz (default)
48 kHz
32 kHz
Reserved
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]
000
Audio Data Format Selection
24-bit standard format, right-justified data
20-bit standard format, right-justified data
18-bit standard format, right-justified data
16-bit standard format, right-justified data
001
010
011
2
100
16- to 24-bit I S format
101
16- to 24-bit left-justified format (default)
110
Reserved
Reserved
111
FLT: Digital Filter Rolloff Control
Default value: 0
FLT = 0
FLT = 1
Sharp rolloff (default)
Slow rolloff
The FLT bit allows the user to select the digital filter rolloff that is best suited to the application. Two filter rolloff
selections are available, sharp and slow. The filter responses for these selections are shown in the Typical
Performance Curves section of this data sheet.
B15
B14
B13
B12
B11
B10
B9
B8
B7
B6
B5
B4
B3
B2
B1
B0
Register 22
0
IDX6 IDX5 IDX4 IDX3 IDX2 IDX1 IDX0 RSV
RSV
RSV
RSV
RSV AZRO ZREV DREV
DREV: Output Phase Select
Default value: 0
DREV = 0
DREV = 1
Normal output (default)
Inverted output
The DREV bit is the output analog signal phase control.
22
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