User Manual

Table Of Contents
22 DS619F1
CS4364
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 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
MSB
LSB LSB
Figure 9. Format 1 - I²S up to 24-bit Data
LRCK
SCLK
Left Channel
Right Channel
SDINx
6543210987
15 14 13 12 11 10
6543210987
15 14 13 12 11 10
32 clocks
Figure 10. Format 2 - Right-Justified 16-bit Data
LRCK
SCLK
Left Channel
SDINx
65432107
23 22 21 20 19 18
65432107
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
6543210987
15 14 13 12 11 10
10
6543210987
15 14 13 12 11 10
17 16 17 16
32 clocks
19 18 19 18
Figure 12. Format 4 - Right-Justified 20-bit Data