( 2) Parallel interface A“ parallel interface” is an interface that transfers data in groups of multiple bits. Since it bundles signal lines and sends data in parallel, it is prone to signal variation. This makes it unsuitable for long-distance transmission. The standards for parallel interfaces are summarized below.
Standard IEEE1284
SCSI( pronounced
“ scuzzy”)
IEEE1284
SCSI
Characteristics
An interface mainly used to connect a computer unit to a printer. In addition to printers, it is also used to connect image scanners and MO devices.
An interface used to connect a computer unit to peripherals. It is mainly used when connecting external peripherals. Up to seven peripherals can be connected in a daisy chain method in which each piece of equipment is connected in series.( The daisy chain can comprise up to eight pieces of equipment including the SCSI board of the computer unit.) Depending on the SCSI standard, up to 15 pieces of equipment( or 16 including the SCSI board of the computer unit) can be connected.
D-sub 25-pin
Amphenol 50-pin
Amphenol 36-pin
D-sub 25-pin
Reference
PCMCIA“ PCMCIA” is a U. S. standardization organization that develops standards and specification for items such as PC cards. There are various types of PC cards including SCSI cards and LAN cards. PC cards transmit data using a parallel transfer method. Abbreviation for“ Personal Computer Memory Card International Association.”
Chapter 8 Computer system
Amphenol half pitch 50-pin Comb-shaped Amphenol half-pitch 50-pin
SCSI connection example
Computer unit Hard disk
Hard disk
Terminator( integrated on the SCSI board)
Other SCSI equipment
CD-ROM drive
Terminator
MO drive
Printer Scanner
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