45.6.3 Host, Controller and Client Modes

In Host and Controller modes, the I2SMCC provides the host clock, the serial clock and the word select. I2SMCC_MCK, I2SMCC_CK, and I2SMCC_WS pins are outputs.

In Controller mode, the I2SMCC receiver and transmitter are disabled. Only the clocks are enabled and used by an external receiver and/or transmitter.

In Client mode, the I2SMCC receives the serial clock and the word select from an external host. I2SMCC_CK and I2SMCC_WS pins are inputs.

The mode is selected by writing I2SMCC_MRA.MODE. Since the MODE field changes the direction of the I2SMCC_WS and I2SMCC_CK pins, the I2SMCC_MRA must only be written when the I2SMCC is stopped in order to avoid unwanted glitches on the I2SMCC_WS and I2SMCC_CK pins.

Note: When the Client mode is configured and TDM format is selected, the high level duration of the WS input signal can be one-slot (1 sample duration), half-slot or one-bit. The duration must be configured in I2SMCC_MRA.TDMFS (See I2SMCC_MRA ).