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USB 2.0 Disk Drives, Technical Challenges to Achieve Ease of Use | Cypress Semiconductor

USB 2.0 Disk Drives, Technical Challenges to Achieve Ease of Use

Last Updated: 
Nov 13, 2008

Analogzone.com (USA)

http://www.analogzone.com/iot_0715.htm

Universal Serial Bus (USB) is an open interface standard that has been included on PC motherboards since late 1997. In 1998, the iMac was introduced, featuring only two i/o interfaces - USB and Ethernet. The first versions of the USB spec (1.0 and 1.1) supported maximum transfer rates of 1 Mbyte/s, with a raw bit rate of 12 Mbit/s. Windows 98 provided the first operating system support for USB with built-in drivers for a range of devices, including mice, keyboards and speakers. In April 2000, the USB Implementers Forum (USB-IF, comprised of Microsoft, Intel, Philips, HP, Compaq, NEC, and Lucent) released version 2.0 of the USB specification. This release added a new "high-speed" transfer rate of 480 Mbit/s, 40 times faster than the fastest rate offered in USB 1.1.