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CS4365
4.3
Digital Interface Formats
The serial port operates as a slave and supports the I2S, 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 configuration is only supported in Software Mode.
LRCK
SCLK
Left Channel
Right Channel
SDINx
MSB
-1 -2 -3 -4 -5
+5 +4 +3 +2 +1
LSB
MSB
-1 -2 -3 -4
+5 +4 +3 +2 +1
LSB
Figure 8. Format 0 - Left-Justified up to 24-bit Data
LRCK
SCLK
Left Channel
Right Channel
SDINx
MSB
-1 -2 -3 -4 -5
+5 +4 +3 +2 +1
LSB
MSB
-1 -2 -3 -4
+5 +4 +3 +2 +1 LSB
Figure 9. Format 1 - I2S up to 24-bit Data
LRCK
SCLK
SDINx
Left Channel
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Right Channel
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
32 clocks
Figure 10. Format 2 - Right-Justified 16-bit Data
LRCK
SCLK
Left Channel
Right Channel
SDINx
0
23 22 21 20 19 18
7 6 5 4 3 2 1 0
23 22 21 20 19 18
7 6 5 4 3 2 1 0
32 clocks
Figure 11. Format 3 - Right-Justified 24-bit Data
LRCK
SCLK
Left Channel
Right Channel
SDINx
1 0
19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
32 clocks
Figure 12. Format 4 - Right-Justified 20-bit Data
DS670F2
23
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