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CS4392
DS459PP3
11
3.6
Digital Interface Format
The device will accept audio samples in several digital interface formats as illustrated in Tables 5 and 8.
The desired format is selected via the M0 and M1 pins for stand alone mode, and through the DIF2:0 bits
in the control port. For an illustration of the required relationship between the Left/Right Clock, Serial
Clock and Serial Audio Data, see Figures 4-6.
M1
M0
DESCRIPTION
FORMAT
FIGURE
00
Left Justified, up to 24-bit data
04
01
I2S, up to 24-bit data
15
10
Right Justified, 16-bit Data
26
11
Right Justified, 24-bit Data
36
Table 5. Digital Interface Format, Stand-Alone Mode Options
Figure 4. Format 0, Left Justified up to 24-Bit Data
LR C K
SC L K
Left C h a n n e l
R igh t C h ann e l
SD A T A
+3 +2 +1 LS B
+5 +4
MSB -1 -2 -3 -4 -5
+3 +2 +1 LS B
+5 +4
MS B -1 -2 -3 -4
Figure 5. Format 1, I2S up to 24-Bit Data
LR C K
SC L K
Le ft C h a n nel
Rig h t Ch a n n e l
SD A T A
+3 +2 +1 LSB
+5 +4
MSB -1 -2 -3 -4 -5
+3 +2 +1 LSB
+5 +4
MSB -1 -2 -3 -4
LRCK
SC LK
Left C hannel
SD ATA
+5 +4 +3 +2 +1 LSB
MSB-1 -2 -3 -4 -5
32 c lo ck s
R ight C h a nnel
LSB
+5 +4 +3 +2 +1 LSB
MSB -1 -2 -3 -4 -5
+6
-6
+6
-6
Figure 6. Format 2, Right Justified 16-Bit Data
Format 3, Right Justified 24-Bit Data
Format 4, Right Justified 20-Bit Data. (Available in Control Port Mode only)
Format 5, Right Justified 18-Bit Data. (Available in Control Port Mode only)
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