Datasheet

11.5. I2S/PCM Interface
There are one I2S/PCM interface which can be configured as master mode or slave mode in AC101. In the
general case, the digital audio interface uses four pins as below:
 BCLK: Bit clock for data synchronization
 LRCK: Left/Right data alignment clock
 SDOUT: output data for ADC data
 SDIN: input data for DAC data
I2S audio interface support four different data formats as below. On the I2S interface, TDM is available for
all four formats and AC101 can use it to transmit or receive up to four channel data on timeslot0 and
timeslot1 simultaneously.

I2S mode

Left justified mode

Right justified mode

PCM short mode
Figure 15 I2S Justified mode