AT43312A-AC(2004) データシートの表示（PDF） - Atmel Corporation

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AT43312A-AC
(Rev.:2004)

Self- and Bus- powered USB Hub Controller

Atmel Corporation 

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/de-serialization

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

Figure 1. Block Diagram

UPSTREAM PORT

PORT 0

HUB

CONTROLLER

SERIAL

INTERFACE

ENGINE

HUB

REPEATER

ENDPOINT 0

ENDPOINT 1

PORT 1

PORT 2

PORT 3

PORT 4

TO DOWNSTREAM DEVICES

Note:

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

therefore only describes the unique features of the AT43312A chip. For detailed informa-

tion about the USB and its operation, the reader should refer to the Universal Serial Bus

Specification Version 1.1, September 23, 1998.

2 AT43312A

1255F–USB–3/04

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