Following are the points of concern
1) Schematic of our POE device is attached below Figure 1 , The IC which we are using in the design is TPS23841.
2) Kindly Share the application diagram for using 4 ports in the IC .
3) Kindly Validate our schematic and give inputs if needs any correction.
4) Device Driver for reading POE registers is in AutoMode.
5) Probelms we are facing in our design : We are able to deliver power to PD with all the four ports.But when we access device registers , for example like enable and disbale poe ports port 1,2 and 4 is working fine with Grand stream phone (PN:962-00080-21C, model: GXP1625) but the 3rd port though the register addresses and values is fed correctly but functionally not working. We are
not able to solve this issue. We are using same I2C bus(POE1_SDO,POE1_SCL) for accessing all four ports as shown below.
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