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. Because of the nature of the connector, a scheme is needed to determine the connector orientation.

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

(DFP, UFP, and 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 TUSB320 device provides Configuration

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

current mode. The TUSB320 device also contains several features such as mode configuration and low standby

current which make this device ideal for source or sinks in USB 2.0 applications.

7.2 Functional Block Diagram

900 K ±1%

CC1

CC2

SDA/OUT1

SCL/OUT2

ADDR

PORT

Connection and

cable detection

CSR

I2C

Digital Controller

3-State Buffer

EN_N

EN_N Logic

CTRL_EN

Open Drain

Output

VBUS Detection

SYS_VBUS

Copyright © 2016, Texas Instruments Incorporated

Figure 7-1. Functional Block Diagram of TUSB320

7.2.1 Cables, Adapters, and Direct Connect Devices

Type-C Specification 1.1 defines several cables, plugs and receptacles to be used to attach ports. The TUSB320

device supports all cables, receptacles, and plugs. The TUSB320 device does not support e-marking.

7.2.1.1 USB Type-C Receptacles and Plugs

Below is list of Type-C receptacles and plugs supported by the TUSB320 device:

• USB Type-C receptacle for USB 2.0 platforms and devices

• USB full-featured Type-C plug

• USB 2.0 Type-C plug

www.ti.com

TUSB320, TUSB320I

SLLSEN9F – MAY 2015 – REVISED MARCH 2022

Copyright © 2022 Texas Instruments Incorporated

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Product Folder Links: TUSB320 TUSB320I