AT43311

1

Features

•

Self-Powered Hub with Bus Power Controller

•

Full Compliance with USB Spec Rev 1.0

•

Full Speed USB Host Interface

•

Four Downstream Ports

•

Downstream Support for Full Speed and Low Speed Transfer Rates

•

Continual Monitoring of Port by System Host

•

Individual Port Power Control

•

USB Connection Status Indicators

•

6 MHz Oscillator with On-Chip PLL

Description

The AT43311 is a fully compliant USB hub chip with 5 ports, one upstream port and

four full/low-speed downstream ports. The AT43311 can be used as a stand alone or

can provide a simple and quick method of adding USB ports to an existing device.

As a repeater, the AT43311 provides upstream connectivity between the selected

function and the host. Connectivity involves setting up and tearing down connections,

handling bus faults, recovering from bus faults and detecting downstream device con-

nections and disconnections.

The AT43311 may also act as a hub controller managing the hub operations and

recording the status of the hub, bus transactions, and downstream ports. In this mode,

the AT43311 tracks and generates the bus enumeration, provides configuration infor-

mation to the host, provides individual port status to the host, and controls the port

operation based on host commands.

0738A-A

USB Hub

AT43311

Preliminary

Pin Configurations

SOIC/DIP/Cerdip

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

32

31

30

29

28

27

26

25

24

23

22

21

20

19

18

17

PWR2

PWR3

PWR4

VCC5

VSS

OSC1

OSC2

LFT

VCCA

OVL4

OVL3

OVL2

OVL1

VREF

GND

STAT4

PWR1

DP4

DM4

DP3

DM3

GND

DP2

DM2

VCC3

DP1

XDM1

DP0

DM0

STAT1

STAT2

STAT3