EVB-USB3280 User Manual
Revision 2.0 (12-18-06)
SMSC EVB-USB3280
2
1 Overview
The EVB-USB3280 is a T&MT Daughter Card that may be attached to a USB link layer system to
create a USB device. The board edge connector meets the UTMI specification requirements for the
T&MT connector. The EVB-USB3280 supports the 8-bit bidirectional UTMI digital interface. A link to
both the UTMI specification and the T&MT specification is located in the SPECIFICATIONS section of
the USB3280 web page on the SMSC web site.
1.1
3.3 Volt Power Supply
The EVB-USB3280 requires a 3.3 volt supply capable of providing 80mA of current to be present at
the T&MT connector.
1.2
Edge Connector for Digital I/O
The T&MT edge connector is compliant to the UTMI specification. The 100 pin edge connector on the
EVB-USB3280 is an AMP 2-557101-5, and it mates with the AMP 2-557100-5.
1.3
Crystal Oscillator
The 24 MHz crystal is connected to the internal oscillator of the USB3280. A PLL circuit in the
USB3280 generates the 60MHz CLKOUT signal used by the link layer.
1.4
USB Connector
A standard type-B connector is provided to attach to the bus.
Figure 1 Top View of the EVB-USB3280
100-Pin
T&MT
Connector
USB
Type B
Connector
USB3280
J2 - J6
Test Points
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