STMicroelectronics STM32F405

Serial audio interface (SAI) RM0090
936/1731 DocID018909 Rev 11
Figure 292. Tristate strategy on SD output line on an inactive slot
When the selected audio protocol uses the FS signal as a start of frame and a channel side
identification (bit FSDEF = 1 in the SAI_xFRCR register), the tristate mode is managed
according to Figure 293 (where bit TRIS in the SAI_xCR1 register = 1, and FSDEF=1, and
half frame length > number of slots/2, and NBSLOT=6).
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