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

Difference among msgbox statement and msgboxq function, MsgBox is a built i...

MsgBox is a built in VB function which shows a Message Box and MsgBoxQ is a function definite by the user.

Determine maximum possible time of 4-bit synchronous counter, A 4-bit synch...

A 4-bit synchronous counter uses flip-flops with propagation delay times of 15 ns each.  The maximum possible time required for change of state will be ? Ans. 15 ns since in sy

Nix commands, reate a directory "Unix" under your home directory. Command(...

reate a directory "Unix" under your home directory. Command(s): ………………………………………….

What is port, What is port? What are the types of port available? An I/...

What is port? What are the types of port available? An I/O interface having of circuitry needed to connect an I/O device to computer bus. One side consists of a data path with

Ifstream on the input file, Write a main function that opens an ifstream on...

Write a main function that opens an ifstream on the input file, "person.dat".  If the stream cannot be  opened, output an error message and exit.       The file format is as foll

Arduino Bingo Project., Hello everybody I have a project that is a bingo bo...

Hello everybody I have a project that is a bingo board run by laser pointers, light sensors, and leds. Basically I''m creating a 5 by 5 grid (bingo board) in which each row and col

Determine the process of kernel, What are the events done by the Kernel aft...

What are the events done by the Kernel after a process is being swapped out from the main memory? When Kernel changes the process out of the primary memory, it performs the fol

Simplify the Boolean expression, The Boolean expression A‾.B + A.B‾ + A.B i...

The Boolean expression A‾.B + A.B‾ + A.B is equivalent to ? Ans. The Boolean expression A‾ .B + A. B‾+ A.B is equivalent to A + B (A‾ .B + A. B‾+ A.B = B( A‾ + A) + A. B‾ =

Drawback of indirect addressing, Q. Drawback of indirect addressing? • ...

Q. Drawback of indirect addressing? • Drawback of this scheme is that it needs two memory references to fetch actual operand. First memory reference is to fetch the actual addr

Detrmine pure paging, Which is not a key piece of information, stored in si...

Which is not a key piece of information, stored in single page table entry, assuming pure paging and virtual memory Ans. A reference for the disk block which stores the page is

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