47.1 Description

The Inter-IC Sound Controller (I2SMCC) provides a 5-wire, bidirectional, synchronous, digital audio link to external audio devices: I2SMCC_DIN, I2SMCC_DOUT, I2SMCC_WS, I2SMCC_CK, and I2SMCC_MCK pins.

The I2SMCC complies with the Inter-IC Sound (I2S) bus specification and supports a Time Division Multiplexed (TDM) interface with external multi-channel audio codecs.

The I2SMCC consists of a receiver, a transmitter and a common clock generator that can be enabled separately to provide Host, Client or Controller modes with receiver and/or transmitter active.

DMA Controller channels, separate for the receiver and for the transmitter, allow a continuous high bit rate data transfer without processor intervention to the following:

  • Audio CODECs in Host, Client, or Controller mode
  • Stereo DAC or ADC through a dedicated I2S serial interface
  • Multi-channel or multiple stereo DACs or ADCs, using the TDM format

The I2SMCC uses a single DMA Controller channel for all audio channels.

The 8- and 16-bit compact stereo formats reduce the required DMA Controller bandwidth by transferring the left and right samples within the same data word.

In Host mode, the I2SMCC can produce a 16 fs to 1024 fs host clock that provides an over-sampling clock to an external audio codec or digital signal processor (DSP).