Datasheet

PCM1789
www.ti.com .............................................................................................................................................. SBAS451A – OCTOBER 2008 – REVISED JANUARY 2009
SRDA[1:0] Sampling mode selection
These bits control the sampling mode of DAC operation. In Auto mode, the sampling mode is
automatically set according to multiples between the system clock and sampling clock: single rate
for 512 f
S
, 768 f
S
, and 1152 f
S
, dual rate for 256 f
S
or 384 f
S
, and quad rate for 128 f
S
and 192 f
S
.
Default value = 00.
SRDA Sampling mode selection
00 Auto (default)
01 Single rate
10 Dual rate
11 Quad rate
DEC HEX B7 B6 B5 B4 B3 B2 B1 B0
17 11 PSMDA RSV RSV RSV RSV FMTDA2 FMTDA1 FMTDA0
PSMDA Power-save mode selection
This bit selects the power-save mode for the OPEDA function. When PSMDA = 0, OPEDA
controls the power-save mode and normal operation. When PSMDA = 1, OPEDA functions
controls the DAC disable (not power-save mode) and normal operation.
Default value: 0.
PSMDA Power-save mode selection
0 Power-save enable mode (default)
1 Power-save disable mode
RSV Reserved
Reserved; do not use.
FMTDA[2:0] Audio interface format selection
These bits control the audio interface format for DAC operation. Details of the format and any
related restrictions with the system clock are described in the Audio Data Interface Formats and
Timing section.
Default value: 0000 (16-/20-/24-/32-bit I
2
S format).
FMTDA Audio interface format selection
000 16-/20-/24-/32-bit I
2
S format (default)
001 16-/20-/24-/32-bit left-justified format
010 24-bit right-justified format
011 16-bit right-justified format
100 24-bit I
2
S mode DSP format
101 24-bit left-justified mode DSP format
110 Reserved
111 Reserved
Copyright © 2008 – 2009, Texas Instruments Incorporated Submit Documentation Feedback 27
Product Folder Link(s): PCM1789