SNLS543 August 2018 DS90UH949A-Q1
In addition to the I2S audio interface, the DS90UH949A-Q1 serializer also supports TDM format. A number of specifications for TDM format are in common use, so the DS90UH949A-Q1 offers flexible support for word length, bit clock, number of channels to be multiplexed, and so forth. For example, assume that the word clock signal (I2S_WC) period = 256 × bit clock (I2S_CLK) time period. In this case, the DS90UH949A-Q1 can multiplex 4 channels with maximum word length of 64 bits each, or 8 channels with a maximum word length of 32 bits each. Figure 17 shows the multiplexing of 8 channels with 24-bit word length in a format similar to I2S.