Inter-IC Sound Bus (I2S)

Features

• Master only
• Single- and multi-channel (up to 10 channels) I2S support
• 8 to 32 data bits per sample
• 16-, 32-, 48-, or 64-bit word select period
• Data rate up to 96 kHz with 64-bit word select period
• Audio clip detection in I2S Rx mode
• Byte swap audio samples to match USB audio class endianness requirement

General Description

The Integrated Inter-IC Sound Bus (I2S) is a serial bus interface standard used for connecting digital audio devices together. The specification is from Philips® Semiconductor (I2S bus specification; February 1986, revised June 5, 1996).

The I2S component operates in master mode only. It also operates in two directions, as a transmitter (Tx) and a receiver (Rx). The data for Tx and Rx are independent byte streams. The  byte streams are packed with the most significant byte first and the most significant bit in bit 7 of  the first word. The number of bytes used for each sample (a sample for the left or right channel)  is the minimum number of bytes to hold a sample.