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

Logic gates required to build a half adder, What are the gates required to ...

What are the gates required to build a half adder ? Ans. The gates needed to build a half adder are EX-OR gate and AND gate as shown below the logic diagram of half adder:

Software architecture of microprocessor, The 68HC11 series is based on the ...

The 68HC11 series is based on the Motorola 6800/1 programming instruction set and hence is a fairly simple 8 bit microprocessor. The internal structure of the 6800/1 is shown below

What is c++ reference and java final, What is C++ reference and JAVA final?...

What is C++ reference and JAVA final? Association ends must be bound at initialization and cannot be altered. C++ references can fully enforce these semantics, and the JAVA fin

What are latches and flipflops, What are latches and flipflops? There a...

What are latches and flipflops? There are two types of circuits as follows: a. Combinational b. Sequential Flipflops and latches both come into the category of "sequen

Find the minimum sop and pos expression, Find the minimum SOP and POS expre...

Find the minimum SOP and POS expression for the following functions using Karnaugh Map and realize the expression using appropriate gates. Also realize SOP form using NAND-to-NAND

Explain the concept of overriding, What is overriding? Overriding is an...

What is overriding? Overriding is an inherent part of association. It can show an ordered set of objects by writing {ordered} next to the appropriate association end. In 200

What is code segment, Q. What is CODE SEGMENT? The logical program segm...

Q. What is CODE SEGMENT? The logical program segment is termed as code segment. When linker links a program it makes a note in header section of program's executable file defin

Describe about sole access protocol, Q. Describe about Sole Access Protocol...

Q. Describe about Sole Access Protocol? The atomic operations that have conflicts are handled with the help of sole access protocol. The method used for synchronization in this

What is flash memory, Q. What is Flash Memory? This memory is other fo...

Q. What is Flash Memory? This memory is other form of semiconductor memory that was first introduced in mid-1980.  These memories can be reprogrammed at high speed and therefo

Versions of small computer systems interface, Q. Versions of small computer...

Q. Versions of small computer systems interface? SCSI-1 calls for a cable with 8 data wires plus one for parity. SCSI-2 allows use of multiple cables to support 16- or

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