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Philips Semiconductors
ISP1521
Hi-Speed USB hub controller
Product data Rev. 03 — 24 November 2004 2 of 53
9397 750 13702
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
2. Features
■ Complies with:
◆ Universal Serial Bus Specification Rev. 2.0
◆ Advanced Configuration and Power Interface (ACPI™), OnNow™ and USB
power management requirements
■ Supports data transfer at high-speed (480 Mbit/s), full-speed (12 Mbit/s) and
low-speed (1.5 Mbit/s)
■ Self-powered capability
■ USB suspend mode support
■ Configurable number of ports
■ Internal power-on reset and low voltage reset circuit
■ Port status indicators
■ Integrates high performance USB interface device with hub handler, Philips Serial
Interface Engine (SIE) and transceivers
■ Built-in overcurrent detection circuit
■ Individual or ganged power switching, individual or global overcurrent protection,
and non-removable port support by I/O pins configuration
■ Simple I
2
C-bus (master/slave) interface to read device descriptor parameters,
language ID, manufacturer ID, product ID, serial number ID and string descriptors
from a dedicated external EEPROM, or to allow the microcontroller to set up hub
descriptors
■ Visual USB traffic monitoring (GoodLink™) for the upstream facing port
■ Uses 12 MHz crystal oscillator with on-chip Phase-Locked Loop (PLL) for low
ElectroMagnetic Interference (EMI)
■ Supports temperature range from −40 °C to +70 °C
■ Available in LQFP80 package.
3. Applications
■ Monitor hubs
■ Docking stations for notebooks
■ Internal hub for USB motherboards
■ Hub for extending Easy PCs
■ Hub boxes.