This information is derived from the TAA5212 datasheet:
By using the PASI_FORMAT[1:0] (P0_R26_D[7:6]) register bits, the bus protocol TDM, I2S, or Left Balanced (LJ) format can be selected for the primary ASI. As shown in Tables 6-2 and 6-3, these modes are all Pulse Code Modulation (PCM) data formats with the most significant byte (MSB) taking precedence. The output channel data word length can be programmed to 16, 20, 24, or 32 bits by configuring the PASI_WLEN[1:0] (P0_R26_D[5:4]) register bits.