I2S connector 4pin 5pin is power.
4pin is GND
5pin is I2S IO Voltage input 1.8 to 3.3v
Normally CON12 1pin and 17pin is IO 3.3v output
Pull up ICC-IO 18 pin then Disable VCC-IO
It case 1pin and 17pin is IO 3.3v input
If differential clock input use the put 100 ohm RD resistor on I2S module (after R3