USB3300_07 datasheet(50/55 Pages) SMSC

50 / 55 page

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

Datasheet

Revision 1.08 (11-07-07)

SMSC USB3300

DATASHEET

7.2

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.

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.

7.3

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.

7.4

ESD Performance

The USB3300 is protected from ESD strikes. By eliminating the requirement for external ESD

protection devices, board space is conserved, and the board manufacturer is enabled to reduce cost.

The advanced ESD structures integrated into the USB3300 protect the device whether or not it is

powered up. When the USB3300 is not powered, the digital I/O pins are loaded by the ESD structures,

and must not be driven by external signals.

Figure 7.4 Expanding Downstream Ports for USB3300 Host Applications

USB3300

CPEN

USBDP0

USBDM0

VBUS_DET

SOC w/

ULPI Link

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

USB Port 2

USBDP2

USBDN2

USB Port 3

USBDP3

USBDN3

USB Port 4

USBDP4

USBDN4

USB Ports 5-7

USBDP5-7

USBDN5-7

USB2507

USB2503

USB2504

USB3300 Datasheet(PDF) 50 Page - SMSC Corporation

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