serial external bus

Serial external computer buses
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  • USB Universal Serial Bus: Universal Serial Bus (USB) is a serial bus standard to interface devices. USB was designed to allow many peripherals to be connected using a single standardized interface socket and to improve the plug-and-play capabilities by allowing devices to be connected and disconnected without rebooting the computer (hot swapping). Other convenient features include providing power to low consumption devices without the need for an external power supply and allowing many devices to be used without requiring manufacturer specific, individual device drivers to be installed.
  • Serial Attached SCSI: Serial Attached SCSI (SAS) is a data transfer technology designed to move data to and from computer storage devices such as hard drives and tape drives.
  • Serial ATA: Serial Advanced Technology Attachment is a computer bus primarily designed for transfer of data between a computer and mass storage devices such as hard disk drives and optical drives.

The main advantages over the older parallel ATA interface are faster data transfer, ability to remove or add devices while operating (hot swapping), thinner cables that let air cooling work more efficiently and more reliable operation with tighter data integrity checks.

  • Controller Area Network (“CAN bus”): Controller Area Network
    (CAN or CAN- bus) is a computer network protocol and bus standard designed to allow microcontrollers and devices to communicate with each other and without a host computer. It was designed specifically for automotive applications but is now also used in other areas.
  • EIA- 485: EIA-485 (formerly RS-485 or RS485) is an OSI model physical layer electrical specification of a two-wire, half-duplex, multipoint serial connection. The standard specifies a differential form of signaling. The difference between the wires’ voltages is what conveys the data. One polarity of voltage indicates logic 1 level, the reverse polarity indicates logic 0. The difference of potential must be at least 0.2 volts for valid operation, but any applied voltages between +12 V and -7 volts will allow correct operation of the receiver.
  • FireWire: FireWire is Apple Inc.’s brand name for the IEEE 1394 interface. It is also known as i.LINK (Sony’s name) and DV (Panasonic’s name). It is a serial bus interface standard, for high- speed communications and isochronous real-time data transfer. Frequently used in a personal computer (and digital audio and digital video).
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