Implementation of BUS, Computer Engineering

Assignment Help:

Q. Implementation of BUS

Construction of a bus system for four registers employing 4×1 multiplexers is displayed below. Every register has four bits which are numbered 0 through 3. Every multiplexer has 4 data inputs, numbered 0 through 3 and two control or selection lines which are  C0 and C1. The data inputs of 0th MUX are associated to the respective 0th input of each register to form four lines of the bus. The 0th multiplexer multiplexes the four 0th bits of the registers and in the same way for the three other multiplexers. 

Because the same selection lines C0 and C1 are connected to all multiplexers so they choose the four bits of one register and transfer them in four-line common bus.

 

1517_Implementation of BUS.png

Figure: Implementation of BUS

When C1C0 = 00 the 0th data input of all multiplexers are selected and this causes bus lines to receive content of register A because the outputs of register A are associated to the 0th data inputs of the multiplexers which is then applied to output which forms the bus. In the same way when C1C0 = 01, register B is selected and so on. The subsequent table displays the register which is selected for every of the four possible values of selection lines: 

267_Implementation of BUS1.png

Figure: Bus Line Selection

To create a bus for 8 registers of 16 bits each you would need 16 multiplexers one for every line in the bus. Number of multiplexers required to construct the bus is equal to number of bits in every register. Every multiplexer should have eight data input lines as well as three selection lines (23 = 8) to multiplex one bit in eight registers.


Related Discussions:- Implementation of BUS

Explain an expression tree with a suitable example, What is an expression t...

What is an expression tree? How an expression is evaluated using an expression tree? Algebraic expressions is as given here a/b+(c-d)e That has an inherent tree-like structure

Explain the hamiltonian path, What is Hamiltonian path?  A Hamiltonian ...

What is Hamiltonian path?  A Hamiltonian path in a directed graph G is a directed path that goes by each node exactly once. We consider a special case of this difficulty where

Briefly explain register-to-register architecture, Register-to-Register Arc...

Register-to-Register Architecture In this organization results and operands are not accessed straight from main memory by scalar or vector registers. The vectors that are neede

How many input ANDand OR gates are required, How many two input AND gates a...

How many two input AND gates and two input OR gates are required to realize Y = BD+CE+AB ? Ans. Here three product terms, therefore three AND gates of two inputs are needed.

Example of calculate maximum access time & cost of switch, Calculate the ma...

Calculate the maximum access time that can be permitted for the data and control memories in a TSI switch with a single input and single output trunk multiplexing 2500 channels. Al

Show independent loops in fortran program, Q. Show Independent loops in for...

Q. Show Independent loops in fortran program? In the subsequent code portion the directives point to the outer two loops are independent. The inner loop allocates elements of A

How the information should be retrieved from the database, In a report with...

In a report with an LDB attribute, you do not have to explain how the information should be retrieved from the database tables, but only how the data should be shown on the screen.

Define the terms- action semantics and argouml, Define the terms- Action Se...

Define the terms- Action Semantics and  ArgoUML Action Semantics : Action semantics is a group of firms that have responded to the OMG's RFP to define the action semantics fo

Define secondary memory, Define secondary memory. This memory holds tho...

Define secondary memory. This memory holds those pages that are not present in main memory. The secondary memory is usually a high speed disk. It is known as the swap evice, an

Problems.., what are the different types of tablets?

what are the different types of tablets?

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