Cirrus Logic CS4391 - Manual (Page 31)

CS4391
DS335PP4 31
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 6 5 4 3 2 1 0 9 8 7 15 14 1 3 1 2 11 10 1 0 6 5 4 3 2 1 0 9 8 7 1 5 1 4 1 3 1 2 1 1 1 0 17 16 1 7 1 6
3 2 cloc ks
1 9 1 8 1 9 1 8
Figure 11. Format 4, Right Justified 20-Bit Data. (Available in Control Port Mode only)
L R C K
S C L K
L eft C h a nn e l
R ig h t C h a n ne l
S D A T A 6 5 4 3 2 1 0 9 8 7 15 14 13 12 11 10 1 0 6 5 4 3 2 1 0 9 8 7 15 14 13 12 11 10 17 16 17 16
32 clocks
Figure 12. Format 5, Right Justified 18-Bit Data. (Available in Control Port Mode only)
Gain
dB
-10dB
0dB
Frequency
T2 = 15 µs
T1=50 µs
F1 F2
3.183 kHz 10.61 kHz
Figure 13. De-Emphasis Curve
Σ Σ
A Channel
Volume
Control
AoutA
AoutB
Left Channel
Audio Data
Right Channel
Audio Data
B Channel
Volume
Control
MUTE
MUTE
Figure 14. ATAPI Block Diagram