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

Non-repudiation achieved in designing e-cash based system, How can non-repu...

How can non-repudiation be achieved into designing e-cash based system? E-cash is fundamentally an online solution. The buyer should validate the coins by the issuer so as to g

Group cells in a layout table, Now you will put navigation button cells you...

Now you will put navigation button cells you just created into a single table. Grouping cells into a table enables you to control cell spacing and to easily move the cells as a gro

Differentiate b/w wml-script & web-based scripting language, Differentiate ...

Differentiate between WML-Script and Web-based scripting languages. WML Script is a lightweight procedural scripting language, optimized for small-memory, low-power CPU wireles

Er diagrams, how can I draw er diagram for sell & storage section of a drug...

how can I draw er diagram for sell & storage section of a drugstore?

Target_parent, TARGET = "_parent" "_parent" is used in a situation whe...

TARGET = "_parent" "_parent" is used in a situation where a frameset file is nested inside another frameset file. A link in one of the inner frameset documents that uses "_par

Smli firewalls are different from the conventional, SMLI firewalls are diff...

SMLI firewalls are different from the conventional The SMLI firewalls are different from the conventional "stand in" proxies in a way that the stand-in proxies are used for th

Explain procedure level of parallel processing, Procedure Level Here, p...

Procedure Level Here, parallelism is obtainable in the form of parallel executable procedures. In that case, design of algorithm plays a key role. E.g. every thread in Java is

Handling multiple devices - computer architecture, Handling Multiple Device...

Handling Multiple Devices Interrupt Priority   Continue to accept interrupt requests from higher priority components   Disable interrupts from component at the sa

Breif on loosely coupled systems, Loosely Coupled Systems These s...

Loosely Coupled Systems These systems don't share global memory since shared memory concept increases the problem of memory conflicts, which consecutively slows down the

Speed up - metrics for performance evaluation, Q. Speed Up - metrics for pe...

Q. Speed Up - metrics for performance evaluation? Speed up is ratio of time needed to execute a given program employing a specific algorithm on a machine with single processor

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