CS4365
3.3
Digital Interface Formats
The serial port operates as a slave and supports the I²S, Left-Justified, Right-Justified, One-Line Mode
(OLM) and TDM digital interface formats with varying bit depths from 16 to 32 as shown in Figures 9-17.
Data is clocked into the DAC on the rising edge. OLM and TDM configurations are only supported in soft-
ware mode.
Left Channel
Right Channel
LRCK
SCLK
SDINx
MSB
LSB
MSB
LSB
+5 +4 +3 +2 +1
+5 +4 +3 +2 +1
-1 -2 -3 -4 -5
-1 -2 -3 -4
Figure 9. Format 0 - Left-Justified up to 24-bit Data
Left Channel
Right Channel
LRCK
SCLK
SDINx
MSB
+5 +4 +3 +2 +1
LSB
MSB
-1 -2 -3 -4
LSB
+5 +4 +3 +2 +1
-1 -2 -3 -4 -5
Figure 10. Format 1 - I2S up to 24-bit Data
Right Channel
LRCK
SCLK
Left Channel
SDINx
9 8 7
6
5 4
3
2 1
0
9 8 7 6 5 4 3 2 1 0
15 14 13 12 11 10
32 clocks
15 14 13 12 11 10
Figure 11. Format 2 - Right-Justified 16-bit Data
Right Channel
LRCK
SCLK
Left Channel
SDINx
7
6
5 4
3
2 1
0
7 6 5 4 3 2 1 0
0
23 22 21 20 19 18
32 clocks
23 22 21 20 19 18
Figure 12. Format 3 - Right-Justified 24-bit Data
22
DS670PP1
CIRRUS [ CIRRUS LOGIC ]
