TUSB8042AI datasheet(15/64 Pages) TI2

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7 Detailed Description

7.1 Overview

The TUSB8042A is a four-port USB 3.2 x1 Gen1-compliant hub. The device provides simultaneous SuperSpeed

USB, high-speed, or full-speed connections on the upstream port. The device also provides SuperSpeed

USB, high-speed, full-speed, or low-speed connections on the downstream port. When the upstream port is

connected to an electrical environment that only supports high-speed, full-speed, or low-speed connections,

SuperSpeed USB connectivity is disabled on the downstream ports. When the upstream port is connected to an

electrical environment that only supports full-speed or low-speed connections, SuperSpeed USB and high-speed

connectivity are disabled on the downstream ports.

7.2 Functional Block Diagram

VBUS

Detect

SuperSpeed Hub

USB 2.0 Hub

Oscilator

Clock

and

Reset

Distribution

Control

Registers

GPIO

I2C

SMBUS

Power

Distribution

VDD33

VSS

GRSTz

SCL/SMBCLK

SDA/SMBDAT

SMBUSz/SS_SUSPEND

PWRCTL1/BATEN1

OVERCUR1z

PWRCTL2/BATEN2

OVERCUR2z

PWRCTL_POL

GANGED/SMBA2/HS_UP

FULLPWRMGMTz/SMBA1/SS_UP

VDD

TEST

OTP

ROM

PWRCTL3/BATEN3

OVERCUR3z

PWRCTL4/BATEN4

OVERCUR4z

AUTOENz/HS_SUSPEND

www.ti.com

TUSB8042A

SLLSF93A – JUNE 2019 – REVISED JANUARY 2025

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