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PCM1774 датащи(PDF) 26 Page - Texas Instruments

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номер детали PCM1774
подробное описание детали  16-Bit, Low-Power Stereo Audio DAC With Analog Mixing, Line and Headphone Outputs
PDF  49 Pages
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производитель  TI [Texas Instruments]
домашняя страница  http://www.ti.com
Logo TI - Texas Instruments

PCM1774 датащи(HTML) 26 Page - Texas Instruments

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PCM1774
SLAS551 – JULY 2007
Register 70
B15
B14
B13
B12
B11
B10
B9
B8
B7
B6
B5
B4
B3
B2
B1
B0
Register 70
0
IDX6
IDX5
IDX4
IDX3
IDX2
IDX1
IDX0
DEM1
DEM0
PFM1
PFM0
SPX1
SPX0
RSV
OVER
IDX[6:0]: 100 0110b (46h): Register 70
DEM[1:0]: De-Emphasis Filter Selection
Default value: 00
A digital de-emphasis filter is in front of the interpolation filter. One of three de-emphasis filters can be selected
corresponding to the sampling rate, 32 kHz, 44.1 kHz, or 48 kHz.
DEM[1:0]
De-Emphasis Filter Selection
00
OFF (default)
01
32 kHz
10
44.1 kHz
11
48 kHz
PFM[1:0]: Audio Interface Selection for DAC (Digital Input)
Default value: 00
The audio interface for the DAC digital input has I2S, right-justified, left-justified, and DSP formats.
PFM[1:0]
Audio Interface Selection for DAC Digital Input
00
I2S format (default)
01
Right-justified format
10
Left-justified format
11
DSP format
SPX[1:0]: Digital Gain Control for DAC Input
Default value: 00
These bits are used to gain up the digital input data.
SPX[1:0]
Digital Gain Control for DAC input
00
0 dB (default)
01
6 dB
10
12 dB
11
18 dB
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 PCM1774 operates at low
sampling rates (less than 24 kHz) and the SCKI frequency is less than 12.5 MHz, OVER = 1 is recommended.
OVER = 0
128 fS (default)
OVER = 1
192 fS, 256 fS, 384 fS
26
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