SLASF36A January 2024 – December 2024 TAC5311-Q1
PRODUCTION DATA
In TDM mode, also known as DSP mode, the rising edge of FSYNC starts the data transfer with the slot 0 data first. Immediately after the slot 0 data transmission, the remaining slot data are transmitted in order. FSYNC and each data bit (except the MSB of slot 0 when TX_OFFSET equals 0) is transmitted on the rising edge of BCLK. Figure 6-2 to Figure 6-5 illustrate the protocol timing for TDM operation with various configurations for transmit DOUT line. The same protocol timing is applicable for recieve DIN line as well.
For proper operation of the audio bus in TDM mode, the number of bit clocks per frame must be greater than or equal to the number of active output channels times the programmed word length of the output channel data. The device supports FSYNC as a pulse with a 1-cycle-wide bit clock, but also supports multiples as well. For a higher BCLK frequency operation, using TDM mode with a PASI_TX_OFFSET value higher than 0 is recommended.