43.6.3 Host, Controller and Client Modes

In Host and Controller modes, the I2SC provides the main system bus clock, the serial clock and the word select. I2SC_MCK, I2SC_CK, and I2SC_WS pins are outputs.

In Controller mode, the I2SC receiver and transmitter are disabled. Only the clocks are enabled and used by an external receiver and/or transmitter.

In Client mode, the I2SC receives the serial clock and the word select from an external host. I2SC_CK and I2SC_WS pins are inputs.

The mode is selected by writing I2SC_MR.MODE. Since this field changes the direction of the I2SC_WS and I2SC_SCK pins, the I2SC_MR must be written when the I2SC is stopped.