Pre-Production
WM8959
Figure 69 DSP Mode Audio Interface (mode B, AIF_LRCLK_INV=1, Slave)
PCM operation is supported in DSP interface mode. Mono PCM data received by the WM8959 will
be treated as Left Channel data. This data may be routed to the Left/Right DACs as described in the
“Digital Input Path” section.
AUDIO DATA FORMATS (TDM MODE)
TDM is supported in master and slave mode and is enabled by register bit AIF_DAC_TDM. All audio
interface data formats support time division multiplexing (TDM) for DAC data.
Two time slots are available (Slot 0 and Slot 1), selected by register bit AIFDAC_TDM_CHAN which
selects the time slot for the DAC data.
When TDM is enabled, BCLK frequency must be high enough to allow data from both time slots to
be transferred. The relative timing of Slot 0 and Slot 1 depends upon the selected data format as
shown in Figure 70 to Figure 74.
Figure 70 TDM in Right-Justified Mode
PP, May 2008, Rev 3.1
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WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
