2

1137J–USB–01/06

AT43301

The AT43301 consists of a Serial Interface Engine, a Hub Repeater, and a Hub Controller.

The Serial Interface Engine’s tasks are:

• Manage the USB communication protocol

• USB signaling detection/generation

• Clock/data separation, data encoding/decoding, CRC generation/checking

• Data serialization/deserialization

The Hub Repeater is responsible for:

• Providing upstream connectivity between the selected device and the host

• Managing connectivity setup and tear-down

• Handling bus fault detection and recovery

• Detecting connect/disconnect on each port

The Hub Controller is responsible for:

• Hub enumeration

• Providing configuration information to the Host

• Providing status of each port to the Host

• Controlling each port per host command

• Managing port power supply

1.1

Block Diagram

Figure 1-2.

AT43301 Block Diagram

Note:

This document assumes that the reader is familiar with the Universal Serial Bus and therefore only

describes the unique features of the AT43301 controller. For detailed information about the USB

and its operation, the reader should refer to the Universal Serial Bus Specification Version 1.1,

September 23, 1998.

HUB

CONTROLLER

SERIAL

INTERFACE

ENGINE

HUB

REPEATER

ENDPOINT 0

ENDPOINT 1

PORT 1

PORT 2

PORT 3

PORT 4

TO DOWNSTREAM DEVICES

UPSTREAM PORT

PORT 0