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

What is exact and approximation algorithm, What is Exact and Approximation ...

What is Exact and Approximation algorithm? The principal decision to choose solving the problem exactly is called exact algorithm. The   principal decision to choose solving th

What are the input devices, What are the Input devices Various devices ...

What are the Input devices Various devices are available for data input on graphics workstations. Most systems have a keyboard and one or more additional devices specially desi

State the basic properties of this analytical engine, State the basic prope...

State the basic properties of this analytical engine The basic properties of this analytical engine are: It was a common purpose programmable machine. It had provisi

Describes the phases of sdlc, Software Development Life Cycle (SDLC):- SDLC...

Software Development Life Cycle (SDLC):- SDLC (System Development Life Cycle) is a well-defined process by which a system is conceived developed and implemented. In other sense a S

What are the techniques of data collection, What are the techniques of Data...

What are the techniques of Data Collection It can be either automatic or manual. Manual techniques can include: -  Keypads/Keyboards to type in data -  touch screens to s

Define interrupt processing, Q. Define Interrupt Processing? On complet...

Q. Define Interrupt Processing? On completion of execution of an instruction machine checks whether there is any pending interrupt request for interrupts which are enabled. If

Memory system considerations - computer architecture, Synchronized with a c...

Synchronized with a clock signal Memory system considerations Speed Cost Size of chip Power dissipation Memory controller Refresh Overhead

Why does dma have priority over the cpu, Why does DMA have priority over th...

Why does DMA have priority over the CPU when both request a memory transfer? The data transfer monitored by DMA controller which is called as DMA channel. The CPU is included o

What are two reasons for using layered protocol, What are two reasons for u...

What are two reasons for using layered protocol? Layered protocol implies protocols used into each layer are the layer's own business that is they don't influence protocol of a

What is the difference among thread and process, Thread is a least unit of ...

Thread is a least unit of process. In process have one or more thread.

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