Specifications Comparision:

Connection Type Speed Max. Devices per IRQ Plug 'N' Play
USB 2.0 480 Mbps 127 Yes
FireWire 400 Mbps 63 Yes
USB 12 Mbps 127 Yes
Parallel 1.15 Mbps 1 No
Serial 1.15 Mbps 1 No

Q: What is USB 2.0?
  • USB 2.0 is an evolution of the USB standard. USB 2.0 handles up to 480 Mbps that creates opportunities for a new class of high performance outside-the-box peripherals. USB 2.0 provides a straightforward performance enhancement to USB 1.1 and offers forward and backward compatibility with USB 1.1 devices. USB 2.0 preserves USB 1.1 in the plug and play model, driver auto installation, and power management features. With use of the same cables and connectors, USB 2.0 is fully backward compatible with USB 1.1. For developer’s, no changes are required for applications and device drivers. USB 2.0 offers a compelling opportunity to migrate their USB peripherals to higher performance into the huge installed base of USB-capable PCs.

    Q: What are the advantages of USB 2.0 over USB 1.1?
  • USB 2.0 offers 480Mbps of bandwidth, which are 40 times more bandwidth over USB 1.1 of 12Mbps for Full Speed devices or 1.5Mbps for Low Speed devices. Unlike in USB 1.1 and other buses, low and full speed devices will run at high speed rate of USB 2.0. This allows other devices on the bus to share the bus.

    Q: What is meant by the slogan "USB 2.0 Ready"
  • The USB 2.0 Hi-Speed board will operate out of the box as a fully compliant USB 1.1 host controller under Windows 98, Windows 98 Second Edition, Windows 2000 and Windows Me. You can connect USB 1.1 and USB 2.0 Hi-Speed peripherals to a USB 2.0 Hi-Speed port and get a data transfer rate of up to 480 Mbits/s (Hi-Speed). Current USB 1.1 peripherals will continue to have a data transfer rate of 12Mb/s (Full-Speed) and 1.5Mb/s (Low-Speed).

    Q: Will the USB 2 Hard Drive work with my Windows based system?
  • Windows 2000, Windows 98SE, Windows 98 and Windows XP is supported by USB 2.0 drivers. Windows NT, Windows 95 do not have native support USB. Therefore will not be supported under USB 2.0.

    Q: Can I use the USB 1.1 devices with others in USB 2.0 devices?
  • Yes. USB 2.0 is forward and backward compatible with USB 1.1. All USB 1.1 devices can be used interchangeably with USB 2.0 devices without affecting performance of either.

    Q: Can I use the USB 2.0 devices with USB 1.1 host controller?
  • Yes. USB 2.0 is backward compatible with USB 1.1. You can use the USB 1.1 host controller with USB 2.0 devices. But you will not enjoy the 480Mbps benefit of the USB 2.0.

    Q: Can I use the USB 1.1 cables in USB 2.0 environment?
  • Yes. USB 2.0 is backward compatible with USB 1.1 even down to cable and connectors. All cables and connectors in USB 2.0 and USB 1.1 are created equal. You can use the existing certified USB 1.1 cables to enjoy the full benefit of USB 2.0.

    Q: Will USB 1.1 devices run faster in USB 2.0 environments?
  • No. USB 1.1 devices will not run at 480Mbps in USB 2.0 environment. But USB 1.1 devices will maintain better performance running through USB 2 card. This is due to brilliant architecture of multiple host controllers inside the host controller chip. Users will be more productive with multiple USB 1.1 devices running together thru the USB 2 board.

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