8.4.3.3.1 Phase Synchronization With I2S Clock In Startup Phase
Step 1, Halt I2S clock.
Step 2, Configure each device phase selection and enable the phase synchronization. For example: Register 0x6A=0x03 for device 0; Register 0x6A=0x07 for device 1; Register 0x6A=0x0B for device 2; Register 0x6A=0x0F for device 3.
Step 3, Configure each device into HIZ mode.
Step 4, Provide I2S to each device. Phase synchronization for all 4 devices is automatically done by internal sequence.
Step 5, Initialize the DSP code (This step can be skipped if only need to do the Phase Synchronization).
Step 6, Device to Device PWM phase shift should be fixed with 45 degree.