SPRUI30H November 2015 – May 2024 DRA745 , DRA746 , DRA750 , DRA756
The McASP supports a wide variety of protocols:
The transmit and receive sections of the module may be individually programmed to support the following options on the basic serial protocol:
In I2S mode, the transmit and receive sections can support simultaneous transfers on up to all serial data pins operating as 192 kHz stereo channels.
In DIT mode for McASP, additional features of the transmitters are:
In DIT mode, the transmitter can support a 192 kHz frame rate (stereo) on up to all serial data pins simultaneously (note that the internal bit clock for DIT runs two times faster than the equivalent bit clock for I2S mode, due to the need to generate Biphase Mark Encoded Data).
The McASP does NOT natively support DIR-mode reception (i.e. receiving in the S/PDIF format). To allow this, the McASP can use a DIR-input to I2S-output converter implemented by an external device (i.e. external DIR component). To facilitate reception in this case, the TDM mode of McASP receivers logic is extended to support a non-standard 384-slot TDM stream.
An external transceiver must be connected to the McASP port in the device to translate the electrical signals delivered by the McASP (1.2 V or 1.8 V LVCMOS levels) to the electrical levels of the S/PDIF standard.