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PCM1792 Datasheet(数据表) 45 Page - Texas Instruments

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部件型号  PCM1792
说明  AUDIO STEREO DIGITAL-TO-ANALOG CONVERTER
下载  61 Pages
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制造商  TI1 [Texas Instruments]
网页  http://www.ti.com
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PCM1792 Datasheet(HTML) 45 Page - Texas Instruments

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PCM1792
SLES069B − MARCH 2003 − REVISED NOVEMBER 2006
www.ti.com
45
DSD MODE CONFIGURATION AND FUNCTION CONTROLS
Configuration for the DSD Interface Mode
DSD = 1 (Register 20, B5)
B15
B14
B13
B12
B11
B10
B9
B8
B7
B6
B5
B4
B3
B2
B1
B0
Register 16
R/W
0
0
1
0
0
0
0
Register 17
R/W
0
0
1
0
0
0
1
Register 18
R/W
0
0
1
0
0
1
0
DMF1
DMF0
Register 19
R/W
0
0
1
0
0
1
1
REV
OPE
Register 20
R/W
0
0
1
0
1
0
0
SRST
1
MONO
CHSL
OS1
OS0
Register 21
R
0
0
1
0
1
0
1
DZ1
DZ0
Register 22
R
0
0
1
0
1
1
0
ZFGR
ZFGL
NOTE:
−: Function is disabled. No operation even if data bit is set
DMF[1:0]: Analog FIR Performance Selection
Default value: 00
DMF[1:0]
Analog-FIR Performance Select
00
FIR-1 (default)
01
FIR-2
10
FIR-3
11
FIR-4
Plots for the four analog FIR filter responses are shown in the TYPICAL PERFORMANCE CURVES section of this
data sheet.
OS[1:0]: Analog-FIR Operation-Speed Selection
Default value: 00
OS[1:0]
Operation Speed Select
00
fDBCK (default)
01
fDBCK /2
10
Reserved
11
fDBCK/4
The OS bit in the DSD mode is used to select the operating rate of the analog FIR. The OS bits must be set before
setting the DSD bit to1.
TDMCA Format
The PCM1792 supports the time-division-multiplexed command and audio (TDMCA) data format to simplify the host
control serial interface. The TDMCA format is designed not only for the McBSP of TI DSPs but also for any
programmable devices. The TDMCA format can transfer not only audio data but also command data, so that it can
be used together with any kind of device that supports the TDMCA format. The TDMCA frame consists of command
field, extended command field, and some audio data fields. Those audio data are transported to IN devices (such
as a DAC) and/or from OUT devices (such as an ADC). The PCM1792 is an IN device. LRCK and BCK are used
with both IN and OUT devices so that the sample frequency of all devices in a system must be the same. The TDMCA
mode supports a maximum of 30 device IDs. The maximum number of audio channels depends on the BCK
frequency.




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