TUSB320LAI: Working principle of USB CC Controller

Hi John,

We have some documents that cover USB type-C and some of the working parts of it, like the CC lines, you can find them on the base TUSB320 page:

• https://www.ti.com/product/TUSB320
• https://www.ti.com/lit/wp/slyy109b/slyy109b.pdf?ts=1750876839053&ref_url=https%253A%252F%252Fwww.ti.com%252Fproduct%252FTUSB320

Essentially, our CC controllers are used to determine the orientation of the Type-C plug, set the role of the board its attached to as a Host(DFP), a Device(UFP), or a DRP, where it can be a Host or Device. It will also help ensure USB3 connections over the type-C cable are routed properly due to the nature of a type-C connector, and it can help with setting higher power draws, I.E 5V/900mA, 5V/1.5A, or 5V/3A.

Ke Quan Tok said:

Besides that, my customer would like to know if there is a requirement for host and slave? 

In a type-C to type-C connection, yes, typically there is a Host(DFP) and a Device(UFP). A DFP would typically be where the SOC is, like a Laptop, and a device would be something like smartphone. Though in both cases, these may be set as DRP's as well, where a DRP essentially allows a device to either source or draw power from whatever it is connected to, depending on whether it's connected to a Host or a Device. The documents above should help detail this.

Thanks,

Ryan