Interface; Outline Of Usb Standard; Benefits Of Usb Scanner - Canon CANOSCAN D1230 series Service Manual

V. INTERFACE
A. Outline of USB Standard
Since early 1997, the Universal Serial Bus (USB) has been the standard on most PCs. The
USB standard was developed by Compaq, IBM, Intel, Microsoft, NEC, and Northern Telecom. It
resulted from an industry-wide initiative to standardize peripheral attachments to PCs, and to
improve the speed, performance and ease of use of PC peripherals.
B. Benefits of USB Scanner
1. True Plug & Play
Unlike the previous generation of SCSI scanners, no add-in cards are required to setup the
USB scanners. This eliminates complex procedures, such as opening the box to install a card,
or reconfiguring the system (setting DMA, IRQ, jumper cables, etc.) The USB scanners are
simply plugged in and unplugged at any time.
2. Higher Speed
USB scanner is nearly 10 times faster than a standard parallel-port scanner at bandwidth 12
Mbits/sec. for data transfer.
3. Multiple Devices Support
USB specification can support up to 127 devices simultaneously on a computer by using
"hub" terminals as additional plug-in ports.
©
COPYRIGHT 2001 CANON INC. CANOSCAN D1230U/D2400U REV.0 MAR. 2001 PRINTED IN JAPAN (IMPRIME AU JAPON)
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