Introduction
IOI-4521A complies with USB Revision 2.0 and OHCI (Open Host Controller Interface) specification for full/low-speed signaling, and Intel's EHCI (Enhanced Host Controller Interface) specification for high-speed signaling which can work up to 480Mbps.

Features
  • Compatible with OpenHCI and EHCI
  • Fully compatible with standard Microsoft USB Drivers
  • Support up to 127 devices over an industry-standard USB-compatible 4-wire cable
  • Support all USB-compatible Devices
  • Integrate seamlessly with NEC's device-side ASICs and d USB HUB-based products. Ensure 100% compatibility for today and future.

Technical Specifications
Host Bus:
  • 2-bit PCI Local Bus, Rev. 2.1 & 2.2 Compatible
  • PCI Bus Power Management Interface Release 1.1
Data Transfer Rate:
  • High-Speed at 480Mbps
  • Full-Speed at 12Mbps
  • Low-speed at 1.5Mbps
USB Port:
  • IOI-4521A: Five A-Type Ports (3 External + 2 Internal)
  • IOI-4521Ai: Five Ports (3 External A-Type CONN + 2 Internal Header 4x1 CONN)
PCI Multifunction Device - Controllers :
  • Two OHCI Host Controller cores for full-/low-speed(12/1.5Mbps)
  • One EHCI Host Controller core for high-speed(480Mbps)
Operating Environment :
  • Temperature Operating: -40 to 55XC
  • Temperature Non-operating: -20 to 60XC
  • Relative Humidity: 0-80% (non-condensing)
Computer Platform
  • Computer with PCI slot
Operating System Requirements
  • Windows
    • USB 1.0: Windows 98 SE/ Me/ 2000/ XP
    • USB 2.0: Windows 2000 SP4/ XP SP2
    • Orangeware USB 2.0 Drivers for: Windows 98 SE/ Me
  • Linux
    • USB 1.0: Kernel 2.2.x or higher
    • USB 2.0: Kernel 2.5.
  • Mac
    • USB 1.0: OS 8.6 or higher
    • USB 2.0: OS 10.3 or higher
    • Orangeware USB 2.0 Drivers for: OS 10.1 and 10.2