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

How does output caching work in asp.net, How does output caching work in AS...

How does output caching work in ASP.NET?    Output caching is a powerful method that enhances request/response throughput by caching the content generated from dynamic pages. O

Write SOP& POS form of a combinational circuit, A combinational circuit has...

A combinational circuit has 3 inputs A, B, C and output F.  F is true for following input combinations A is False, B is True A is False, C is True A, B, C are

What data structure is used by an operating system, What data structure is ...

What data structure is used by an operating system to keep track of process information? Explain A data structure termed as process control block (PCB ) is used by an operat

Programming, DADA Electronics makes CD players in 3 processes: programming,...

DADA Electronics makes CD players in 3 processes: programming, and packaging. Direct materials are added at the starting of the assembly process. Conversion costs are incurred even

What do you meant by hosts, Q. What do you meant by Hosts? Hosts are in...

Q. What do you meant by Hosts? Hosts are in general, individual machines at a specific location. Resources of a host machine is generally shared and can be utilized by any user

Application to calculate weekly payment of a company, Problem: A compa...

Problem: A company requires a software application to calculate the weekly payment for its employees. The information about the employees (employees' data) is kept in a file.

Explain what is data mining, What is data mining? Data Mining: It...

What is data mining? Data Mining: It is an analytic process designed to explore data and after that to validate the findings through applying the detected patterns to lat

Drawback of these electromechanical and mechanical computers, Drawback of t...

Drawback of these electromechanical and mechanical computers The basic drawback was: Inertia/friction of moving components had limited speed. The data movement usin

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