Configuring I2S to Generate BC

ABSTRACT
This application note describes a method for interfacing the multichannel buffered serial
port (McBSP) to the I2S™ interface of the TLV320AIC32/33/31, the
TLV320AIC3101/3104/3105/3106/3204/3254 and DAC32 devices such that the bit
clock (BCLK) is generated by the audio data converter device and the word clock
(WCLK) is generated by the McBSP.
This type of interface is useful in applications where the host processor (with a McBSP
interface) can synchronize the audio (with video, for example) by controlling the WCLK,
whereas the data converter device can generate the BCLK depending on the I2S
configuration. The McBSP interface is supported in a variety of processors from Texas
Instruments, such as the TMS320C5000/C6000™ digital signal processors (DSPs), the
DaVinci™ digital media processors, and OMAP applications processors.