Explain about programmable logic array, Computer Engineering

Assignment Help:

Q. Explain about Programmable Logic Array?

Until now individual gates are considered as fundamental building blocks from that different logic functions can be derived. With the advancement of technology integration achieved by integrated circuit technology has raised resulting in production of one to 10 gates on a single chip (in small scale integration). The gate level designs are created at gate level only however  if design is to be done employing these SSI chips design consideration required to be changed as some of such SSI chips may be used for creating a logic circuit. With VLSI and MSI we can put still more gates on a chip and can make gate interconnections on a chip also. This connection and integration brings benefits of reduced cost and size as well as increased speed. However main drawback faced in these kinds of VLSI & MSI chip is that for every logic function layout of gate and interconnection requires to be designed. Cost involved in making these custom designs is quite high. So came the concept of Programmable Logic Array which is a general purpose chip that can be readily accepted for any particular purpose.

PLA are designed for SOP form of Boolean function and comprises regular arrangements of AND, NOT and OR gate on chip. Every input to chip is passed through a NOT gate so input and its complement are available to every AND gate. Output of every AND gate is made available for every OR gate and output of every OR gate is considered as chip output. By making suitable connections any logic function can be realized in these Programmable Logic Arrays. 

2493_Explain about Programmable Logic Array.png

Figure: Programmable Logic Array

The figure (a) presents a PLA of 3 inputs and 2 outputs. Please consider connectivity points, all these points can be linked if desired. Figure (b) presents an implementation of logic function:

O0 = I0. I1. I2 + I¯0. I¯1. I¯2 and O1 = I¯0. I¯1. I¯2 + I¯0. I¯1 through PLA.


Related Discussions:- Explain about programmable logic array

Two "next screen "attributes, Of the two "next screen "attributes the attri...

Of the two "next screen "attributes the attributes that has more priority is?? Dynamic.

Input, what is an input?

what is an input?

The extra key inserted at the end of the array, The extra key inserted at t...

The extra key inserted at the end of the array is called a Sentinel is the extra key inserted at the end of the array

Generic techniques developed - artificial intelligence, Generic Techniques ...

Generic Techniques Developed: In the pursuit of solutions to various problems in the above categories, various individual fundamental techniques have sprung up which have been

State of the register, What is the state of the register in Figure  after e...

What is the state of the register in Figure  after every clock pulse if it begins in the 101001111000 state?

Combinational logic circuits, A circuit can be designed to perform manydiff...

A circuit can be designed to perform manydifferent functions e.g.a circuit has 3 inputs A, B and C and 3 outputs:Output X is logic level 1 (or 'high') if one or moreinputs are at l

Define apple mobileme calendar, Define Apple MobileMe Calendar The Mobi...

Define Apple MobileMe Calendar The MobileMe Calendar is a web-based calendar that can be accessed from any computer linked to the Internet, Mac or Windows. What makes it more u

Explain different parameter passing mechanisms to a function, What are the ...

What are the different parameter passing mechanisms to a function? The different parameter-passing mechanisms are given below: 1.   Call by value 2.   Call by value-resu

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