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

Define target _blank, TARGET = "_blank" "_blank" opens new document in...

TARGET = "_blank" "_blank" opens new document in a new window. Run the code given in Figure and check how it works. This value doesn't require the use of any frames. "_blank"

What is glitch and what are causes of it, What is glitch? What causes this ...

What is glitch? What causes this (describe with waveform)? How to overcome this? The gated clock‘s corresponding timing diagram demonstrates that it implementation can lead to

What is the difference between awt and swt, SWT (Standard Widget Toolkit) i...

SWT (Standard Widget Toolkit) is a totally independent Graphical User Interface (GUI) toolkit from IBM. They formed it for the creation of Eclipse Integrated Development Environmen

Where arq is transmitted, ARQ is transmitted in the event of: (A)  Los...

ARQ is transmitted in the event of: (A)  Loss of signal                          (B) Error in received data (C)  Improve reliability                  (D) During time out

What is fish bone diagram, What is Fish Bone Diagram? Or Explain Ishikawa D...

What is Fish Bone Diagram? Or Explain Ishikawa Diagram. Fish Bone Diagram is also known as Ishikawa Diagram or Cause and Effect Diagram. It is known as Fish Bone Diagram be

How to execute an instruction, Execution: Now instruction is ready for exec...

Execution: Now instruction is ready for execution. A different opcode will need different sequence of steps for execution. Hence let's discuss a few illustrations of execution of s

Determine maximum possible time of 4-bit synchronous counter, A 4-bit synch...

A 4-bit synchronous counter uses flip-flops with propagation delay times of 15 ns each.  The maximum possible time required for change of state will be ? Ans. 15 ns since in sy

What do you mean by term procedure, What do you mean by term procedure? Dif...

What do you mean by term procedure? Differentiate between far call and near call? PROC: PROC and ENDP directives indicate the start and end of a procedure. These directives for

Explain about encoding technique used in bitmaps indexes, Bitmaps commonly ...

Bitmaps commonly use one bitmap for each single distinct value. Number of bitmaps used can be decreased by opting for a dissimilar type of encoding. Space can be optimized but when

What is rational administrator, Use the Rational Administrator to: * M...

Use the Rational Administrator to: * Make and manage projects. * Make a project under configuration management. * Make a project outside of configuration management.

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