What is input - output interface, Computer Engineering

Assignment Help:

The I/O interface provides a technique for transferring information between external I/O devices and internal storage. Peripherals linked to a computer require special communication links for interfacing them with CPU. Objective of communication link is to resolve differences which exist between central computer and every peripheral. The key differences are:

  • Peripherals are electromechanical and electromagnetic devices as well as their operations are different from operation of CPU and memory which are electronic devices.
  • Data transfer rate of peripherals is generally slower than transfer rate of CPU and thus a synchronization mechanism may be required.
  • Data codes and formats in peripherals differ from word format in CPU and memory.
  • Operating modes of peripherals are dissimilar from one another and each one should be controlled so as not to disturb operation of other peripherals associated to CPU.

To resolve these differences, computer systems include special hardware component between the CPU and peripherals to supervise and synchronize all input and output transfers. These components are called interface units because they interface between the processor bus and the peripheral device.


Related Discussions:- What is input - output interface

Vector processing, Vector Processing  A vector is an ordered set of the...

Vector Processing  A vector is an ordered set of the similar type of scalar data items. The scalar item can be a floating point number, a logical value or an integer. Vector pr

Advantages of using clusters, Q. Advantages of using clusters? Para...

Q. Advantages of using clusters? Parallel and distributed applications Decreased turnaround time Balanced loads Utilization of more powerful hosts Access to

What is rom, What is ROM? Read only memory [ROM] is used for storing pr...

What is ROM? Read only memory [ROM] is used for storing programs that are permanently resident in the computer and for tables of constants that do not change in value as the pr

Mobile cameras, Mobile cameras are characteristically low-resolution Digita...

Mobile cameras are characteristically low-resolution Digital cameras integrated in mobile set. Photographs are characteristically only good enough to show on low resolution mobile

Explain virtual address, What is virtual address? The binary address th...

What is virtual address? The binary address that the processor used for either instruction or data known as virtual address.

Define instruction code, Define Instruction Code. An Instruction code i...

Define Instruction Code. An Instruction code is a group of bits that instructs the computer to perform an exact operation. It is usually separated into parts, each having its o

Define resolution versus accuracy in mouse, Q. Define Resolution versus Acc...

Q. Define Resolution versus Accuracy in mouse? Resolution of mouse is known in CPI (Counts per Inch) it implies that number of signals per inch of travel.  This implies the mou

Information gain, Information Gain: Now next here instantly return to ...

Information Gain: Now next here instantly return to the problem of trying to determine the best attribute to choose for a particular node in a tree. As in the following measur

What is a diagonalization language ld, What is a Diagonalization language L...

What is a Diagonalization language LD?  The  diagonalization  language  having  of  all  strings  w  such  that  the  TM  whose  code is w does not accept when w is given as in

Explain the synchronous-transmission, A control character is sent at the be...

A control character is sent at the beginning as well as at the end of every block in the synchronous-transmission in order to  (A) Synchronize the clock of transmitter and rece

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd