Hi-Speed USB Host or Device PHY with ULPI Low Pin Interface

Revision 1.02 (02-16-05)

10

SMSC USB3300

PRODUCT PREVIEW

Multi-Port Applications

To support multiple ports a single USB3300 host can be combined with one of SMSC’s many hub

products to expand the number of ports. SMSC has 2-port, 3-port, 4-port, and 7-port hub designs which

can be used to expand the number of ports in a design.

Figure 6 Expanding Downstream Ports for USB3300 Host Applications

Using a SMSC hub to expand the number of ports allows a single Link to run several USB devices

without a separate Link to support each USB port. Another advantage of using a SMSC hub is on

products where the main board is not located near the USB ports. The USB3300 can be placed on

the main board with the Link ASIC and the hub can be placed on a separate board next to the USB

ports. The only data connection required between the boards is DP and DM.

The CPEN output of the USB3300 is optional and can be used to turn the Hub on or off to lower current

when the USB connection isn’t needed.

Evaluation Board

An evaluation board, EVB-USB3300, is available for building a prototype system with the USB3300.

The evaluation board provides an industry standard T&MT connector to interface a ULPI Link controller

and a Mini-AB connector for the USB cable. A 500mA fault protected 5V Vbus switch that is controlled

by the USB3300 is also included.

Supporting Documentation

■

Universal Serial Bus Specification, Revision 2.0, April 27, 2000

■

On-The-Go Supplement to the USB 2.0 Specification, Revision 1.0a, June 24, 2003

■

USB 2.0 Transceiver Macrocell Interface (UTMI) Specification, Version 1.02, May 27, 2000

■

UTMI+ Specification, Revision 1.0, February 2, 2004

■

UTMI+ Low Pin Interface (ULPI) Specification, Revision 1.1

USB3300

DP

DM

CPEN

USBDP0

USBDM0

VBUS_DET

SOC w/

ULPI Link

DP

DM

USB Port 1

USBDP1

USBDN1

DIR

NXT

STP

DATA[7]

DATA[6]

DATA[5]

DATA[4]

DATA[3]

DATA[2]

DATA[1]

DATA[0]

CLOCK

DIR

NXT

STP

DATA[7]

DATA[6]

DATA[5]

DATA[4]

DATA[3]

DATA[2]

DATA[1]

DATA[0]

CLOCK

USB2502

DP

DM

USB Port 2

USBDP2

USBDN2

DP

DM

USB Port 3

USBDP3

USBDN3

DP

DM

USB Port 4

USBDP4

USBDN4

DP

DM

USB Ports 5-7

USBDP5-7

USBDN5-7

USB2507

USB2503

USB2504