USB3500

DS00002103A-page 4

 2005 - 2016 Microchip Technology Inc.

1.0

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 USB 2.0 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 USB 2.0 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 con-

nector.

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)

DM

V

BUS

DP

ID

Hi-Speed

USB App.

UTMI+

Interface

UTMI+

Digital

Logic

UTMI+

Link