Production Data
WM8912
Figure 35 DSP Mode Audio Interface (mode A, AIF_LRCLK_INV=0, Slave)
Figure 36 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 WM8912 will
be treated as Left Channel data. This data may be routed to the Left/Right DACs as described in the
“Digital Mixing” section.
AUDIO DATA FORMATS (TDM MODE)
TDM is supported in master and slave mode and is enabled by the AIFDAC_TDM register bit. 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 the AIFDAC_TDM_CHAN register bit.
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 37 to Figure 41.
Figure 37 TDM in Right-Justified Mode
PD, Rev 4.0, September 2010
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WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
