Cirrus Logic CS4392 - Manual (Page 11)

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
0 0 Left Justified, up to 24-bit data 0 4
0 1 I 2 S, up to 24-bit data 1 5
1 0 Right Justified, 16-bit Data 2 6
1 1 Right Justified, 24-bit Data 3 6
Table 5. Digital Interface Format, Stand-Alone Mode Options
Figure 4. Format 0, Left Justified up to 24-Bit Data
L R C K
S C L K
L e ft C h a n n e l R ig h t C h a n n e l
S D A T A +3 +2 +1 LS B +5 +4 M SB -1 -2 -3 -4 -5 +3 +2 +1 LS B +5 +4 M S B -1 -2 -3 -4
Figure 5. Format 1, I
2
S up to 24-Bit Data
L R C K
S C L K
L e ft C h a n n e l R ig h t C h a n n e l
S D A T A +3 +2 +1 LSB +5 +4 MSB -1 -2 -3 -4 -5 +3 +2 +1 LSB +5 +4 M SB -1 -2 -3 -4
LR C K
S C LK
L e ft C h a n ne l
S D A TA +5 +4 +3 +2 +1 LSB MSB -1 -2 -3 -4 -5
3 2 c lo ck s
R ig h t C h a n n e l
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)