How does multiplexer know which line to select, Computer Engineering

Assignment Help:

How does multiplexer know which line to select?

This is managed by select lines. The select lines provide communication among different components of a computer. Now let's see how multiplexer also called as MUX. For simplicity we will take illustration of 4 ×1 MUX it implies that there are 4 input lines associated to 1 output line. For the sake of consistency we would call input line as I and output line as O and control line a selection line S or enable as E.

Please notice the way in that S0 and S1 are associated in circuit. To 'a' AND gate S0 and S1 are inputted in complement form which means 'a' gate will output I0 when both selection lines have a value 0 that means S¯0  = 1 and S¯1   = 1, which implies that S0= 0 and S1=0 and therefore first entry in truth table. Please note that at S0 = 0 and S1 = 0 AND gate 'b', 'c', 'd' will provide 0 output and when all these outputs will pass OR gate 'e' they will provide I0 as output for this case. Which is for S0=0 and S1=0 output becomes I0 which in another words can be called as 'For S0 = 0 and S1 = 0, I0 input line is triggered by MUX'. In the same way other entries in truth table are respective to logical nature of figure. Thus by having two control lines we can have a 4×1 MUX. To have 8×1 MUX we should have 3 control lines or with 3 control lines we can make 23 = 8 it implies that 8×1 MUX. In the same way with 'n' control lines we could have 2n×1 MUX. Another parameter that is principal in MUX design is a number of inputs to AND gate. These inputs are decided by voltage of gate that generally supports a maximum of 8 inputs to a gate. 

Where can these devices used in computer? Multiplexers are used in digital circuits for data and organized signal routing.  We have seen a theory where out of 'n' input lines 1 can be triggered so we have a reverse concept it implies that if we have one input line and data is passed to one of the possible 2n lines where 'n' denotes number of selection lines. This operation is known as Demultiplexing.


Related Discussions:- How does multiplexer know which line to select

Explain the modularity of object oriented analysis, Explain the Modularity ...

Explain the Modularity of Object oriented analysis Modularity is closely attached to encapsulation; you may think of it as a way of mapping encapsulated abstractions into phys

Write an interrupt routine to handle division by zero, Q. Write an interrup...

Q. Write an interrupt routine to handle 'division by zero'? This file can be loaded just like a COM file though makes itself permanently resident until the system is running.

An example of load-store optimization using expression trees, Give LOAD-STO...

Give LOAD-STORE optimization based on expression trees for the expression (A+B)/(C-D). LOAD-STORE optimization based on expression trees for the expression (A+B)/(C-D) is given

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(); //

Html, discuss hypertext mark up language

discuss hypertext mark up language

What is status control and registers, Q. What is Status Control and Registe...

Q. What is Status Control and Registers? Status Control and Registers: These registers can't be used by programmers though are used to control CPU or execution of a program.

Create a sliding puzzle, As demonstrated in a simple manner in my Animated ...

As demonstrated in a simple manner in my Animated Tiles example, the purpose of this assignment is to use jQuery animations to develop a simple puzzle using DIV tags and styles. C

What are the types of assemblies, What are the Types of Assemblies? One...

What are the Types of Assemblies? One of the drawback of using Visual Studio.NET and the .NET framework to develop applications has been the lack of cross-platform support. As

What is cyclomatic complexity, What is cyclomatic complexity? Cyclomati...

What is cyclomatic complexity? Cyclomatic complexity is a computer science metric (measurement) developed by Thomas McCabe used to generally calculate the complexity of a progr

State about agp, State about AGP The latest addition to many computer s...

State about AGP The latest addition to many computer systems is the inclusion of accelerated graphics port (AGP). AGP operates at the bus clock frequency of the microprocessor.

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