USB3500 datasheet(7/46 Pages) SMSC

7 / 46 page

Hi-Speed USB Host, Device or OTG PHY With UTMI+ Interface

Datasheet

SMSC USB3500

Revision 1.0 (04-04-05)

DATASHEET

Chapter 1 General Description

The USB3500 is a stand-alone Hi-Speed USB Physical Layer Transceiver (PHY). The USB3500 uses

a UTMI+ interface to connect to an SOC or FPGA or custom ASIC. The USB3500 provides a flexible

alternative to integrating the analog PHY block for new designs.

The USB3500 provides a fully compliant USB2.0 interface, and supports High-Speed (HS), Full-Speed

(FS), and Low-Speed (LS) USB. The USB3500 supports all levels of the UTMI+ specification as shown

in Figure 1.2.

The USB3500 can also, as an option, fully support the On-the-Go (OTG) protocol defined in the On-

The-Go Supplement to the USB2.0 Specification. On-the-Go allows the Link to dynamically configure

the USB3500 as host or peripheral configured dynamically by software. For example, a cell phone may

connect to a computer as a peripheral to exchange address information or connect to a printer as a

host to print pictures. Finally the OTG enabled device can connect to another OTG enabled device to

exchange information. All this is supported using a single low profile Mini-AB USB connector.

Designs not needing OTG can ignore the OTG feature set.

Figure 1.1 Basic UTMI+ USB Device Block Diagram

SOC/FPGA/ASIC

Including Device Controller

USB3500

USB 2.0

Analog

w/ OTG

USB

Connector

(Standard

or Mini)

BUS

Hi-Speed

USB App.

UTMI+

Interface

UTMI+

Digital

Logic

UTMI+

Link

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