1/fs
LRCIN/
LRCOUT
BCLK
Left Channel
Right Channel
DIN/
n
n−1
1
0
n
n−1
1
0
n
DOUT
MSB
LSB
Figure 3−6. Left-Justified Mode Timing
2
3.3.1.3 I S Mode
2
In I S mode, the MSB is available on the second rising edge of BCLK, after the falling edge on LRCIN or LRCOUT
(see Figure 3-7).
1/fs
LRCIN/
LRCOUT
BCLK
1BCLK
Left Channel
Right Channel
DIN/
n
n−1
1
0
n
n−1
1
0
DOUT
MSB
LSB
2
Figure 3−7. I S Mode Timing
3.3.1.4 DSP Mode
The DSP mode is compatible with the McBSP ports of TI DSPs. LRCIN and LRCOUT must be connected to the Frame
Sync signal of the McBSP. A falling edge on LRCIN or LRCOUT starts the data transfer. The left-channel data consists
of the first data word, which is immediately followed by the right channel data word (see Figure 3-8). Input word length
is defined by the IWL register. Figure 3−8 shows LRP = 1 (default LRP = 0).
LRCIN/
LRCOUT
BCLK
Left Channel
n−1
Right Channel
n−1
DIN/
n
1
0
n
1
0
DOUT
MSB
LSB MSB
LSB
Figure 3−8. DSP Mode Timing
3−8
TI [ TEXAS INSTRUMENTS ]
