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SMSC EVB-USB3320 USER MANUAL Revision 1.0 (02-09-10)
Copyright © 2010 SMSC or its subsidiaries. All rights reserved.
Circuit diagrams and other information relating to SMSC products are included as a means of illustrating typical applications. Consequently, complete information
sufficient for construction purposes is not necessarily given. Although the information has been checked and is believed to be accurate, no responsibility is assumed
for inaccuracies. SMSC reserves the right to make changes to specifications and product descriptions at any time without notice. Contact your local SMSC sales office
to obtain the latest specifications before placing your product order. The provision of this information does not convey to the purchaser of the described semiconductor
devices any licenses under any patent rights or other intellectual property rights of SMSC or others. All sales are expressly conditional on your agreement to the terms
and conditions of the most recently dated version of SMSC's standard Terms of Sale Agreement dated before the date of your order (the "Terms of Sale Agreement").
The product may contain design defects or errors known as anomalies which may cause the product's functions to deviate from published specifications. Anomaly
sheets are available upon request. SMSC products are not designed, intended, authorized or warranted for use in any life support or other application where product
failure could cause or contribute to personal injury or severe property damage. Any and all such uses without prior written approval of an Officer of SMSC and further
testing and/or modification will be fully at the risk of the customer. Copies of this document or other SMSC literature, as well as the Terms of Sale Agreement, may be
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EVB-USB3320 USB Transceiver
Evaluation Board User Manual
EVB-USB3320 USB Transceiver Evaluation Board User Manual
Revision 1.0 (02-09-10) 2 SMSC EVB-USB3320
USER MANUAL
1 Introduction
This user manual is for the USB3320 USB Transceiver Evaluation Board (EVB) for use with USB3320
products with the integrated USB switch.
The USB3320 features a ULPI interface to support systems with USB Host, Device, or On-the-Go
(OTG) capability. The integrated switch can be used to multiplex a Full Speed USB signal or audio
signals over the HS USB DP/DM pins. SMSC supplies a complete family of transceiver products to
meet the needs of many applications.
2 Overview
The EVB-USB3320 is a Daughter Card designed to plug into a user's test system using a T&MT
connector. The card attaches to a USB link layer to create a USB Host, Device, or On-the-Go (OTG)
system. The board edge connector meets the UTMI+ Low Pin Interface (ULPI) Standard requirements
for the T&MT connector.
A link to the ULPI Working Group Page is available at www.smsc.com or may be obtained from your
local FAE. The EVB-USB3320 includes USB3320 packaged silicon and all external components
required for the USB transceiver function.
This manual describes PCB assembly PCB-7163AZ.
2.1 Supplying VBUS Voltage
In Host or OTG operation, the EVB-USB3320 must provide 5 Volts on V
BUS at the USB connector. The
EVB-USB3320 includes a switch that can drive VBUS using the 5 Volt supply that comes from pin 28
of the T&MT connector.
The VBUS switch is controlled by the CPEN signal from the USB3320. The USB controller dictates
the state of CPEN by programming the ULPI register in the USB3320. The 5 Volt switch is backdrive
protected when in the off state. The switch does not provide protection from reverse currents when it
is on. See Section 2.9 and Section 2.10 for more information on configuring the EVB-USB3320 for
OTG and Host operation.
2.2 1.8 Volt Power Supply
The EVB-USB3320 EVB has a Low Drop-Out (LDO) Regulator that drives the USB3320 VDD18 pins.
This LDO requires a nominal 3.3 Volt supply capable of providing 80mA of current to be present at the
T&MT connector (pins 8, 16, 57, or 69).
2.3 ULPI I/O Voltage
The USB3320 supports variable ULPI I/O voltage signaling. The ULPI I/O voltage is supplied in one
of two ways. By default, the EVB is shipped with VDDIO supplied by the on-board LDO.
Resistor R18 is used to set VDDIO, the digital logic high voltage. To change the value of VDDIO,
calculate a new value for R18 (ohms) as follows.
R18 = (VDDIO/1.225-1) x 169000
VDDIO must be in the range of 1.8 Volts - 3.3 Volts nominal.
VDDIO can also be supplied to the USB3320 from the T&MT connector instead of using the LDO. To
do this, the LDO (U10) must be removed.
The VDDIO voltage level that has been configured on the EVB-USB3320 must be the same as the
ULPI I/O voltage level that the link is using.
EVB-USB3320 USB Transceiver Evaluation Board User Manual
SMSC EVB-USB3320 3 Revision 1.0 (02-09-10)
USER MANUAL
2.4 Edge Connector for Digital I/O
The T&MT edge connector is compliant to the ULPI specification. Part numbers and manufacturers for
this connector and it’s mate are given in Table 2.1.
2.5 REFCLK Frequency Selection
The EVB-USB3320 offers a user selectable reference clock frequency. R25 - R30 are used to configure
the REFCLK[2:0] signals which will select the reference clock frequency desired on the EVB-USB3320.
Ensure that the frequency of the reference clock or reference crystal being used matches the desired
operation frequency configured based on Table 2.2 below. By default, the EVB-USB3320 is configured
for 26MHz REFCLK operation.
2.6 USB Connector
A standard Mini-AB connector is provided to attach a USB cable or connector. Provision is made on
the PCB to accept a Micro-AB connector. See the bill of materials in Section 6 for connector part
numbers. Do not substitute a different part number for the Mini-AB receptacle or a short circuit of the
USB signals may result at the micro-AB connector PCB footprint.
2.7 VBUS Present Detection
The USB controller must detect VBUS when a USB cable is attached in device mode or when the USB
controller turns on VBUS in host or OTG mode. The USB connector VBUS signal is connected to the
VBUS pin of the USB3320. The USB3320 includes all of the comparators required to detect VBUS and
report the state of VBUS to the USB controller via the ULPI bus.
Table 2.1 Edge Connector on the EVB-USB3320
PART NUMBER DESCRIPTION MANUFACTURER
2-557101-5 100 pin edge connector on EVB-USB3320 AMP
2-557-101-5 Mating connector to the EVB-USB3320 AMP
1-1734037-0 Alternate 100 pin edge connector for EVB-USB3320 TYCO
1-1734099-0 Alternate mating connector to the EVB-USB3320 TYCO
Table 2.2 Reference Frequency Selection Resistor Configurations
R25 R26 R27 R28 R29 R30 REFCLK FREQUENCY
INSTALL EMPTY INSTALL EMPTY EMPTY INSTALL 26.0 MHz (Default)
EMPTY INSTALL INSTALL EMPTY EMPTY INSTALL 12.0 MHz
EMPTY INSTALL EMPTY INSTALL EMPTY INSTALL 52.0 MHz
INSTALL EMPTY INSTALL EMPTY INSTALL EMPTY 24.0 MHz
INSTALL EMPTY EMPTY INSTALL INSTALL EMPTY 19.2 MHz
EMPTY INSTALL INSTALL EMPTY INSTALL EMPTY 27.0 MHz
EMPTY INSTALL EMPTY INSTALL INSTALL EMPTY 38.4 MHz
INSTALL EMPTY EMPTY INSTALL EMPTY INSTALL 13.0 MHz

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Marka: Microchip
Kategoria: nieskategoryzowany
Model: USB3320

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