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Philips Semiconductors
UM10011_4
ISP1521 Hi-Speed USB Hub Demo Board
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
User manual Rev. 04.00 — 17 June 2004 5 of 20
1. Introduction
The ISP1521 is a Hi-Speed Universal Serial Bus (USB) hub IC, with seven downstream facing
ports. The ISP1521 Hub Demo Board is designed to demonstrate the features and functionality
of the ISP1521.
This document describes the ISP1521 Hub Demo Board. It also contains the related schematics,
the PCB layout, and the Bill of Material (BoM).
Figure 1-1: ISP1521 Hub Demo Board
2. ISP1521 Hub Demo Board Features
• Complies with Universal Serial Bus Specification Rev. 2.0
• Supports self-powered operation
• Configurable number of downstream facing ports (from two to seven)
• Customizable Vendor ID, Product ID and Serial Number (by using an external EEPROM or
an external microcontroller)
• Individual power switching and individual overcurrent protection
• USB traffic indication (GoodLink
TM
LED) on the upstream facing port
• Port status indicators.