Note that the latest datasheet which describes I2S support is here: http://www.cypress.com/file/414181/download
Note that the PCM interface shares HW with the I2S interface and only one can be used at any time. In addition, I2S/PCM in our device can be accessed only by the stack and not by the application.
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Michael Fortneris right in the above response. As of now, there are no drivers to access the I2S interface from application.
The I2S interface is used for routing audio samples while using audio profiles such as the A2DP and the selected data path is I2S. The I2S block is configured automatically by the Bluetooth firmware.
In other words, developers cannot access the I2S block from application, it can be only be used to transfer audio samples for A2DP profile and the firmware will take care of configuring the interface when used.
Thank you. That explains why I can't find it in WICED.
I am working with the CYW20719 and I was planning to use the i2s interface for a custom audio application, I am disappointed to read that it is not possible ... Do you have other modules that allows using the i2s from the applications ?