Figure 7: Timing in Auxiliary Mode
Clock and mode can be configured by AT command, and the default configuration is master mode using
short frame synchronization data format with 2048kHz PCM_CLK and 8kHz PCM_SYNC. In addition, the
module’s firmware has integrated the configuration on some PCM codec’s application with I2C interface.
The following figure shows a reference design of PCM interface with an external codec IC.
Figure 8: Reference Circuit of PCM Application with Audio Codec
3.7. Control Signals
The following table shows the pin definition of control signals.
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