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

And-introduction rule, And-Introduction: In generally English says tha...

And-Introduction: In generally English says that "if we know that a lot of things are true, so we know that the conjunction of all of them is true", then we can introduce conj

Why we need parallel programming languages, Q. Why we need parallel program...

Q. Why we need parallel programming languages? The parallel programming languages are created for parallel computer environments.  These are developed either by creating new la

Write an applet that display the directory holding html file, Write an appl...

Write an applet that display the directory holding the HTML file that started the applet and the directory from which, applet class file was loaded. An applet is here given bel

Why is c standard library needed, Why is C standard library needed?  C ...

Why is C standard library needed?  C Standard Library: C would have been a tough programming language in absence of the standard library. The standard library in C contains

Write a verilog code for synchronous and asynchronous reset, Write a Verilo...

Write a Verilog code for synchronous and asynchronous reset? Synchronous  reset, synchronous means clock dependent so reset must not be present in sensitivity disk eg: alway

Dbms, aggregation in dbms?

aggregation in dbms?

Research methods, Building on their knowledge of research methods and their...

Building on their knowledge of research methods and their interest in a particular aspect of information technology this assessment enables students to put this knowledge into prac

Draw layout cells in a table, Now add layout cells into which you will add ...

Now add layout cells into which you will add text about travel locations. 1.  In Objects panel, click the Draw Layout Cell icon and move the pointer to layout table you just dre

Cryptarithmetic problem in artificial intelligence, Solve the following cry...

Solve the following cryptarithmetic problem using Prolog: P I N G P O N G + F U N --------- I G N I P Each of the 7 different letters stands for a different digit. The

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