203 * Channel length (number of bits per audio channel)
204 * 0: 16-bit wide
205 * 1: 32-bit wide
206 * The bit write operation has a meaning only if DATLEN = 00 otherwise the channel length is fixed to 32-bit by hardware whatever the value filled in.
207 * Note: For correct operation, this bit should be configured when the I2S is disabled.