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

Challenges in changing information technology, Q: Challenges and Prospects ...

Q: Challenges and Prospects in Changing Information Technology? There is no doubt that information technology has made significant progress during the past two decades. Modern

Why do we call motherboard a motherboard, Motherboard is called as motherbo...

Motherboard is called as motherboard because in the world all borned creature is directly attached to her mother & after it all the relations makes due to her mother so in the simi

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

Queue, A Queue is a FIFO ( rst in, rst out) data structure. Given the foll...

A Queue is a FIFO ( rst in, rst out) data structure. Given the following queue interface: public interface Queue { int size(); // current queue size boolean isEmpty(); //

Define technique of improving priority of process wait queue, is a techniqu...

is a technique of improving the priority of process waiting in Queue for CPU allocation? Ageing is a technique of enhancing the priority of process waiting in Queue for CPU all

How do you find out the flaw, How do you find out the flaw, which of the ad...

How do you find out the flaw, which of the address getting written wrongly. Fill the full memory once with either random data or sequential data then after filling totally rea

What do you mean by software poll, Q. What do you mean by Software Poll? ...

Q. What do you mean by Software Poll? In this scheme on occurrence of an interrupt, processor jumps to an interrupt service program or routine whose job is to poll (roll call

Find farthest distance from exchange where subscriber locate, An exchange u...

An exchange uses a -40 V battery to drive subscriber lines. A resistance of 250 ohms is placed in series with the battery to protect it from short circuits. The subscribers are req

How to use activex control in .net, How to use ActiveX Control in .Net ? ...

How to use ActiveX Control in .Net ? ActiveX control is a special type of COM component that handles a User Interface. Using ActiveX Control in your .Net Project is even simple

Environments -artificial intelligence, Environments: We have seen that...

Environments: We have seen that an agents intelligent should take into account certain information when it choose a rational action, including information from its sensors, in

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