SMSC USB3503 Manual
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USB3503 Evaluation Board Manual
Copyright © 2011 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
obtained by visiting SMSC's website at http://www.smsc.com. SMSC is a registered trademark of Standard Microsystems Corporation ("SMSC"). Product names and
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USER MANUAL
SMSC USB3503 EVB
Revision 1.0 (08-22-11)

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Summary of Contents for SMSC USB3503

  • Page 1 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 obtained by visiting SMSC’s website at http://www.smsc.com.
  • Page 2: Operation

    Initial Bring Up The USB3503 EVB has a default configuration that allows it to operate as a stand alone hub. To begin, connect the U.FL connectors to the HSIC host. Then, plug the evaluation board into the 5V power supply.
  • Page 3 Figure 3.2 Upstream and Downstream Ports Test Points, Switches and LEDs There are multiple test points to confirm that the USB3503 EVB is powered properly. TP1 and TP6 connect to GND, TP2 connects to the VBAT pin, and TP3 connects to the VDD_CORE_REG pin.
  • Page 4: Configuration Resistors

    (Red) and switches (Yellow). The USB3503 SCL, SDA, RESET_N, HUB_CONNECT and INT_B pins are also exposed on the J1 header. These pins are compatible with the Total Phase Aardvark pinout, where pin 1 of the Aardvark connector connects to pin 1 of header J1 (Refer to Figure 4.1...
  • Page 5 To provide external power to the VDD_CORE_REG pin remove R8 and supply the power through TP3. The USB3503 can function with a single power supply; to do this remove R8 and place a 0Ohm resistor on R9. This connects the VDD_CORE_REG pin to the VDD33_BYP pin allowing the USB3503’s internal 3.3V regulator to supply the VDD_CORE_REG voltage.
  • Page 6 USB3503 Evaluation Board Manual Table 3.2 VBAT and VDD_CORE_REG source control VDD_CORE_REG VBAT SOURCE SOURCE INSTALL EMPTY INSTALL Onboard Regulator VDD33_BYP EMPTY EMPTY INSTALL External (TP2) VDD33_BYP Below are the locations of the resistors on the back side of the board: Figure 3.5 Regulator resistors...
  • Page 7 USB3503 Evaluation Board Manual 4 Software The USB3503 EVB comes with a CD that contains evaluation software that can be used with the Total Phase Aardvark USB-I C adaptor (not included with the Evaluation Kit). To install the software, run Setup.exe, found on the CD.
  • Page 8: Digital Control

    Set the RESET_N pin low to reset the part and place it into the lowest power state. If the CONNECT pin is low when the RESET pin transitions from low to high, the USB3503 will remain in a state that allows the serial interface registers to be manipulated.
  • Page 9 The USB3503 can enumerate as a Self Powered or Bus Powered Hub with 1, 2 or 3 downstream ports. The VID, PID, DID and enumeration strings can also be customized to allow the USB3503 to enumerate with whatever identification is desired.
  • Page 10 USB3503 Evaluation Board Manual 5 USB3503 EVB Schematic Figure 5.1 USB3503 EVB Schematic SMSC USB3503 EVB Revision 1.0 (08-22-11) USER MANUAL...
  • Page 11 USB3503 Evaluation Board Manual 6 USB3503 EVB Bill of Materials Figure 6.1 USB3503 EVB Bill of Materials SMSC USB3503 EVB Revision 1.0 (08-22-11) USER MANUAL...
  • Page 12: Revision History

    USB3503 Evaluation Board Manual 7 Revision History Table 7.1 Customer Revision History REVISION LEVEL & DATE SECTION/FIGURE/ENTRY CORRECTION Rev 1.0 Initial Release (7-13-11) SMSC USB3503 EVB Revision 1.0 (08-22-11) USER MANUAL...

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