PCM3793RHB BURR-BROWN [Burr-Brown Corporation], PCM3793RHB Datasheet - Page 33

• Manufacturer Part Number: PCM3793RHB
• Description: 16-Bit, Low-Power Stereo Audio CODEC With Microphone Bias, Headphone, and Digital Speaker Amplifier
• Manufacturer: BURR-BROWN [Burr-Brown Corporation]

IDX[6:0]: 100 0110b (46h): Register 70
DEM[1:0]: De-Emphasis Filter Selection
Default value: 00
The digital de-emphasis filter is in front of the interpolation filter. One of three de-emphasis filters can be
selected, corresponding to sampling rate, 32 kHz, 44.1 kHz, or 48 kHz.
PFM[1:0]: Audio Interface Selection for DAC (Digital Input)
Default value: 00
The audio interface for the DAC digital input has I
OVER: Oversampling Control for Delta-Sigma DAC
Default value: 0
This bit is used to control the oversampling rate of delta-sigma DAC. When the PCM3793/94 operates at low
sampling rates, less than 24 kHz with SCKI frequency less than 12.5 MHz, using this function with OVER = 1 is
recommended.
Register 70
DEM[1:0]
00
01
10
11
PFM[1:0]
00
01
10
11
OVER = 0
OVER = 1
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B15
0
IDX6
B14
De-Emphasis Filter Selection
OFF (default)
32 kHz
44.1 kHz
48 kHz
Audio Interface Selection for DAC Digital Input
I
Right-justified format
Left-justified format
DSP format
128 f
192 f
IDX5
2
B13
S format (default)
S
S
, 256 f
(default)
IDX4
B12
S
, 384 f
IDX3
B11
S
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IDX2
B10
2
IDX1
S, right-justified, left-justified, and DSP formats.
B9
IDX0
B8
DEM1
B7
DEM0
B6
SLES193A – AUGUST 2006 – REVISED SEPTEMBER 2006
PFM1
B5
PFM0
B4
RSV
B3
RSV
B2
PCM3793
PCM3794
RSV
B1
OVER
B0
33