参数资料
型号: PCM3794RHBTG4
厂商: TEXAS INSTRUMENTS INC
元件分类: 通信及网络
英文描述: SPECIALTY TELECOM CIRCUIT, PQCC32
封装: 5 X 5 MM, GREEN, PLASTIC, QFN-32
文件页数: 27/67页
文件大小: 1417K
代理商: PCM3794RHBTG4
www.ti.com
SLES193C – AUGUST 2006 – REVISED FEBRUARY 2007
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
RSV
OVER
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.
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
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.
OVER = 0
128 fS (default)
OVER = 1
192 fS, 256 fS, 384 fS
33
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