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

What is the difference among conventional and HD T.V, a. Write down the sal...

a. Write down the salient difference among conventional T.V. and High Definition TV (HDTV) and also highlight the various benefits of digital representation for video. b. Video

Image matching using cross correlation, I am confuse how i start my coding ...

I am confuse how i start my coding in this topic please help me to start my coding.

Problem solving in parallel-, Problem Solving In Parallel Introduction ...

Problem Solving In Parallel Introduction to Parallel Computing This section examines how a particular task can be broken into minor subtasks and how subtasks can be answer i

Define about the objects, Define about the Objects The object notation...

Define about the Objects The object notation is the same in basic form as that for a class. There are three differences among the notations, these are given below: With

Salient points about addressing mode, Salient points about addressing mode ...

Salient points about addressing mode are:  This addressing mode is employed to initialise value of a variable. Benefit of this mode is that no extra memory accesses are

State about the object oriented analysis design, State about the Object ori...

State about the Object oriented analysis design Object oriented analysis design (OOAD) is a bottom up approach which supports viewing system as a set of components (objects) w

Name the approaches used for generating the control signals, What are the t...

What are the two approaches used for generating the control signals in proper sequence? Hardwired control Micro programmed control

Determine the operations from functions, Operations from Functions As ...

Operations from Functions As we know, function is actually operations on object. These   functions could be simple and summarized on object model. Organise functions into oper

Mingw32 compiler, Although there are no compulsory "c" compiler for this su...

Although there are no compulsory "c" compiler for this subject, but the compiler we are going to use for this example is the Mingw32 compiler. Download the source code files fro

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