Case x and z difference which is preferable and why, Computer Engineering

Assignment Help:

Case x, z difference, which is preferable, why?

CASEZ :

Special version of case statement that uses a Z logic value to signify don't-care bits.

CASEX :

Special version of case statement that uses Z or X logic values to represent don't-care bits.

CASEZ  must be  used  for  case  statements  with  wildcard  don't  cares,  or else  use  of  CASE  is required; CASEX must never be used.

This is because:

Don't cares aren't allowed in the "case" statement. Hence casex or casez are required. Casex would automatically match any x or z with anything in the case statement. Casez would only match z's --x's require an absolute match.

Case

case Complete bitwise match between expression and case item expression casez enables for z values to be treated as don't cares.

casex allows for both x and z to be treated as don't cares.

 

2434_casex,y.png


Related Discussions:- Case x and z difference which is preferable and why

Microprocesser, explain the bock and pin diagram of 8259 micropocesser

explain the bock and pin diagram of 8259 micropocesser

Explain scientific applications and image processing, Scientific Applicatio...

Scientific Applications/Image processing Major of concurrent processing applications from science and other academic disciplines, are mostly have based on numerical simulations

Initial thought process, Initial thought process: Design a script which...

Initial thought process: Design a script which was simple and user friendly.  Integrate procedures/functions to extract data under the hood.  I focused on giving the user the o

Inherent addressing, Inherent addressing   Here the address is already b...

Inherent addressing   Here the address is already built in to the instruction i.e. inherent to the code     ABA  ; Add A to B and store the answer in A  Simple programs using

What do you mean by ssi chips, Q. What do you mean by SSI chips? The 3 ...

Q. What do you mean by SSI chips? The 3 rd generation computers mostly used SSI chips. One of the key concepts that were brought forward for the duration of this time was conc

What is non-repudiation, What is non-repudiation? Non Repudiation: Assu...

What is non-repudiation? Non Repudiation: Assurance that the sender is given with proof of delivery and that the recipient is provided with proof of the sender's identity so th

Example of asymptotic notations, Q. Example of asymptotic notations? Th...

Q. Example of asymptotic notations? The function f (n) belongs to the set  (g(n)) if there exists positive constants c such that for satisfactorily large values of n we have 0

Illustrate 16-bit isa, Illustrate 16-bit ISA?  Compare it with 8-bit ISA bu...

Illustrate 16-bit ISA?  Compare it with 8-bit ISA bus.  The only difference between 8 and 16-bit ISA bus is that an extra connector is attached behind the 8-bit connector. 16-b

List the major components of the keyboard, List the major components of the...

List the major components of the keyboard/Display interface. a. Keyboard section b. CPU interface section c. Display section d. Scan section

Define exception, Define exception. The term exception is used to trans...

Define exception. The term exception is used to transfer to any event that causes an interruption

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