TUSB3410 datasheet(11/92 Pages) TI

11 / 92 page

1–1

1 Introduction

1.1

Controller Description

The TUSB3410 provides bridging between a USB port and an enhanced UART serial port. The TUSB3410 contains

all the necessary logic to communicate with the host computer using the USB bus. It contains an 8052 microcontroller

unit (MCU) with 16K bytes of RAM that can be loaded from the host or from external on-board memory via an I2C

bus. It also contains 10K bytes of ROM that allow the MCU to configure the USB port at boot time. The ROM code

also contains an I2C boot loader. All the device functions such as the USB command decoding, UART setup, and error

reporting are managed by the internal MCU firmware under the auspices of the PC host.

The TUSB3410 can be used to build an interface between a legacy serial peripheral device and a PC with USB ports,

such as a legacy-free PC. Once configured, data flows from the host to the TUSB3410 via USB OUT commands and

then out from the TUSB3410 on the SOUT line. Conversely, data flows into the TUSB3410 on the SIN line and then

into the host via USB IN commands.

Host

(PC or OTG DRD)

USB

Out

TUSB3410

SOUT

SIN

Legacy

Serial

Peripheral

Figure 1–1. Data Flow

TUSB3410 Datasheet(PDF) 11 Page - Texas Instruments