USB3300-EZK(2005) データシートの表示（PDF） - SMSC -> Microchip

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USB3300-EZK
(Rev.:2005)

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

SMSC -> Microchip 

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

General Description

The USB3300 is a stand-alone Hi-Speed USB Physical Layer Transceiver (PHY). The USB3300 uses

a low pin count interface (ULPI) to connect to a ULPI compliant Link layer. The ULPI interface reduces

the UTMI+ interface from 54 pins to 12 pins using a method of in-band signaling and status byte

transfers between the Link and PHY.

This PHY was designed from the start with the ULPI interface. No UTMI to ULPI wrappers are used

in this design which provides a seamless ULPI to Link interface. The result is a PHY with a low latency

transmit and receive time. SMSC’s low latency high speed and full speed receiver provide the option

of re-using existing UTMI Links with a simple wrapper to convert UTMI to ULPI.

The ULPI interface allows the USB3300 PHY to operate as a device, host, or an On-The-Go (OTG)

device. Designs using the USB3300 PHY as a device, can add host and OTG capability at a later date

with no additional pins.

The ULPI interface, combined with SMSC’s proprietary technology, makes the USB3300 the ideal

method of adding Hi-Speed USB to new designs. The USB3300 features an industry leading small

footprint package (5mm by 5mm) with sub 1mm height. In addition the USB3300 integrates all DP and

DM termination resistances and requires a minimal number of external components.

ULPI

LINK

CLK

STP

DIR

NXT

DATA[7:0]

USB3300

ULPI

Digital

Logic

USB 2.0

Analog

w/ OTG

32 Pin QFN

VBUS

ID

USB

Connector

DM

(Standard

DP

or Mini)

Figure 1 Basic ULPI USB Device Block Diagram

The ULPI interface consists of 12 interface pins; 8 bi-directional data pins, 3 control pins, and a 60

MHz clock. By using the 12 pin ULPI interface the USB3300 is able to provide support for the full range

of UTMI+ Level 3 through Level 0, as shown in Figure 2, "ULPI Interface Features as Related to

UTMI+". This allows USB3300 to work as a HS and FS peripheral and as a HS, FS, and LS Host.

The USB3300 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 USB3300 to function like a

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.

In addition to the advantages of the leading edge ULPI interface, the use of SMSC’s advanced analog

technology enables the USB3300 to consume a minimum amount of power which results in maximized

battery life for portable applications.

SMSC USB3300

3

PRODUCT PREVIEW

Revision 1.02 (02-16-05)

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