TPS65987D: Interface and communication

Hi David,

Answers to your questions are as follows:

1.       How to communication between DFP and UFP through one CC pin?  Is there need a configured bps inside both of DFP and UFP?

Yes, communication between DFP and UFP happens through one CC pin and this communication is governed by the USB Type-C and PD specification. There's no need to configure bps as it's fixed to 300KHz with max of 10% of tolerance.

2.       Is there integrated PD protocol inside of TPS65987D？ Or the TPS65987 is only a physical interface, and we need flash or MCU to storage the PD protocol and control the behavior of TPS65987D？

TPS65987D is full-function PD controller, which doesn't need any external microcontroller to make it work. However, depending on your need you might have to add an external SPI flash to store the custom configuration data, but thats pretty much it.

3.       To realize a full function of Power Delivery,  is there need other interface IC besides TPS65987D？

Generally there's no need of any other interface, however, if you're implementing a complex system where settings might change dynamically, then you will need an external microcontroller to control the TPS65987D over it's I2C bus. You will also need external USB AM Muxes and power regulator to generate various voltages as required to support the PDOs.

Please click "This resolves my issue" if this answers your query.

Thanks,

Rahul