
SLAS428 AUGUST 2004
www.ti.com
15
I
2
S MODE
In I
2
S mode, the MSB of the left channel is valid on the second rising edge of the BCLK after the falling edge of ADWS or
LRCK. Similarly the MSB of the right channel is valid on the second rising edge of the BCLK after the rising edge of
LRCK.
BCLK
LRCK
DIN
n
n1
1
0
n
n1
1
0
LSB
MSB
n
1 clock before MSB
n2
2
n2
2
1/fs
Left Channel
Right Channel
Figure 11. Timing Diagram for I
2
S Mode
DSP MODE
In DSP mode, the falling edge of LRCK starts the data transfer with the left channel data first and immediately followed
by the right channel data. Each data bit is valid on the falling edge of BCLK.
BCLK
LRCK
DIN/
n
n1
1
0
n
n1
1
0
LSB
MSB
n
n1
1
0
MSB
LSB
n2
2
n2
2
n2
MSB
LSB
1/fs
Left Channel
Right Channel
Figure 12. Timing Diagram for DSP Mode