22
DS619F1
CS4364
4.3
Digital Interface Formats
The serial port operates as a slave and supports the IS, Left-Justified, Right-Justified, and One-Line Mode
(OLM) digital interface formats with varying bit depths from 16 to 32 as shown in Figures 8-15. Data is
clocked into the DAC on the rising edge. OLM configurations are only supported in Software Mode.
LRCK
SCLK
Left Channel
Right Channel
SDINx
+3 +2 +1
+5 +4
-1 -2 -3 -4 -5
+3 +2 +1
+5 +4
-1 -2 -3 -4
MSB
LSB
MSB
LSB
Figure 8. Format 0 - Left-Justified up to 24-bit Data
LRCK
SCLK
Left Channel
Right Channel
SDINx
+3 +2 +1
+5 +4
-1 -2 -3 -4 -5
+3 +2 +1
+5 +4
-1 -2 -3 -4
MSB
LSB
Figure 9. Format 1 - IS up to 24-bit Data
LRCK
SCLK
Left Channel
Right Channel
SDINx
65
432
1
0
98
7
15 14 13 12 11 10
6
543
2
1
0
98
7
15 14 13 12 11 10
32 clocks
Figure 10. Format 2 - Right-Justified 16-bit Data
LRCK
SCLK
Left Channel
SDINx
65
432
1
0
7
23 22 21 20 19 18
6
543
2
1
0
7
23 22 21 20 19 18
32 clocks
0
Right Channel
Figure 11. Format 3 - Right-Justified 24-bit Data
LRCK
SCLK
Left Channel
Right Channel
SDINx
654
3210
987
15 14 13 12 11 10
10
654321
0
987
15 14 13 12 11 10
17 16
32 clocks
19 18
Figure 12. Format 4 - Right-Justified 20-bit Data
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