SWCU194 March 2023 CC1314R10 , CC1354P10 , CC1354R10 , CC2674P10 , CC2674R10
The sample word length in memory (16 or 24 bits) is configured independently of sample word length on the serial interface (8 to 24 bits). Sample words are truncated when the destination is shorter than the source and zero-padded when the destination is longer than the source.
The I2S:AIFFMTCFG.MEM_LEN_24 field configures whether sample words in memory are 16 bit or 24 bit: