CC1

CC2

PORT

VDD

SYS_VBUS

GND

VBUS

Detection

Open Drain Output

CURRENT_MODE

Tri-State

Buffer

Digital

Controller

Connection

and

Cable

Detection

VBUS_ON

CRTL_INT

CRTL_ID

CRTL_EN_N

CTRL

CRTL_ID

CRTL_EN_N

VBUS_DET

OUT2

OUT1

VCONN_FAULT

ID

900

NŸ “1%

CTRL

DIR

Logic

DIR

DIR_CTRL

VBUS_ON

TUSB321AI

SLLSER2 – OCTOBER 2015

www.ti.com

7.2 Functional Block Diagram

7.3 Feature Description

7.3.1 Port Role Configuration

The TUSB321AI device can be configured as a downstream facing port (DFP), upstream facing port (UFP), or

resistance, low to GND or left as floated on the PCB to achieve the desired mode. This flexibility allows the

TUSB321AI device to be used in a variety of applications. The TUSB321AI device samples the PORT pin after

reset and maintains the desired mode until the TUSB321AI device is reset again. Table 1 lists the supported

features in each mode:

8

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