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2.2.2 I
2
S Serial-Interface Format
The normal output mode for the I
2
S serial-interface format is for 16, 18, 20, or 24 bits.
Figure 2−2 shows the following characteristics of this protocol:
• Left channel is transmitted when LRCLK is low.
• SDIN is sampled with the rising edge of SCLK.
• SDOUT is transmitted on the falling edge of SCLK.
• If the LRCLK phase changes by more than 10 cycles ofMCLK, the codec automatically resets.
SCLK
LRCLK = f
S
X LSB
SDIN
X LSB
Left Channel Right Channel
SDOUT
……
……
…
…
MSB
MSB
X LSB
X LSB
……
……
…
…
MSB
MSB
Figure 2−2. I
2
S Serial-Interface Format