CC1

CC2

SDA/OUT1

SCL/OUT2

ADDR

EN_N

GND

Connection and cable

detection

CSR

I2C

Digital Controller

DIR

DIR Logic

DIR_CTRL

900K ±1%

VDD

VCONN

TUSB322I

SLLSEO5 – OCTOBER 2015

www.ti.com

7 Detailed Description

7.1 Overview

The USB Type-C ecosystem operates around a small form factor connector and cable that is flippable and

reversible. Due to the nature of the connector, a scheme is required to determine the connector orientation.

Additional schemes are required to determine when a USB port is attached and the acting role of the USB port

(DFP, UFP, DRP), as well as to communicate Type-C current capabilities. These schemes are implemented over

the CC pins according to the USB Type-C specifications. The TUSB322I device provides Configuration Channel

(CC) logic for determining USB port attach and detach, role detection, cable orientation, and Type-C current

mode. The TUSB322I device also contains several features such as VCONN sourcing, USB3.1 mux direction

control, mode configuration, and low standby current, all of which make the TUSB322I device ideal for source or

sinks in USB2.0 or USB3.1 applications.

7.2 Functional Block Diagram

8

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