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PCM1795DB Datasheet(PDF) 29 Page - Texas Instruments

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Part # PCM1795DB
Description  32-Bit, 192-kHz Sampling, Advanced Segment, Stereo Audio Digital-to-Analog Converter
PDF  58 Pages
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

PCM1795DB Datasheet(HTML) 29 Page - Texas Instruments

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Register 18
R/W
0
0
1
0
0
1
0
ATLD
FMT2
FMT1
FMT0
DMF1
DMF0
DME
MUTE
B15
B14
B13
B12
B11
B10
B9
B8
B7
B6
B5
B4
B3
B2
B1
B0
PCM1795
www.ti.com ........................................................................................................................................................................................................ SLES248 – MAY 2009
Table 10. Attenuation Levels
ATx[7:0]
DECIMAL VALUE
ATTENUATION LEVEL SETTING
1111 1111b
255
0 dB, no attenuation (default)
1111 1110b
254
–0.5 dB
1111 1101b
253
–1.0 dB
—
—
—
0001 0000b
16
–119.5 dB
0000 1111b
15
–120.0 dB
0000 1110b
14
Mute
—
—
—
0000 0000b
0
Mute
R/W: Read/Write Mode Select
When R/W = 0, a write operation is performed.
When R/W = 1, a read operation is performed.
Default value: 0
ATLD: Attenuation Load Control
This bit is available for read and write.
Default value: 0
ATLD
Attenuation Control Setting
ATLD = 0
Attenuation control disabled (default)
ATLD = 1
Attenuation control enabled
The ATLD bit is used to enable loading of the attenuation data contained in registers 16 and 17. When ATLD =
0, the attenuation settings remain at the previously programmed levels, ignoring new data loaded from registers
16 and 17. When ATLD = 1, attenuation data written to registers 16 and 17 is loaded normally.
FMT[2:0]: Audio Interface Data Format
These bits are available for read and write.
Default value: 101
FMT[2:0]
Audio Data Format Selection
000
16-bit standard format, right-justified data, BCK
≥ x32 fS
001
32-bit standard format, right-justified data, BCK
≥ x64 fS
010
24-bit standard format, right-justified data, BCK
≥ x48 fS
011
24-bit MSB-first, left-justified format data, BCK
≥ x48 fS
100
32-bit I2S format data, BCK
≥ x64 fS
101
24-bit I2S format data (default), BCK
≥ x48 fS
110
Reserved
111
Reserved
Copyright © 2009, Texas Instruments Incorporated
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Product Folder Link(s): PCM1795



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