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

State the data flow diagramming conpects, State the data flow diagramming c...

State the data flow diagramming conpects The approach to data flow diagramming is as follows: Create a data flow diagram for each of major outputs of system Work ba

Number square, Ask question #MinimYour professor wants you to fill a two-di...

Ask question #MinimYour professor wants you to fill a two-dimensional N by N matrix with some numbers by following a specific pattern. According to his explanation as in the figure

Clocked sr flip flop, Clocked SR flip flop A clock pulse is a...

Clocked SR flip flop A clock pulse is a sequence of logic 0, logic 1, and logic 0 occuring on the CLK input. Time t n occurs before the clock pulse and time t n+1

Example of time division multiplexing, Two computers using TDM take up turn...

Two computers using TDM take up turns to send 100-bytes packet over a shared channel that operates at 64000 bits per second. The hardware takes 100 microseconds after one computer

What makes a circuit ''digital''?, All digital devices are made from circui...

All digital devices are made from circuits whichcan be switched between two possible states.These two states are represented by a voltagelevel at the output of the circuit e.g. 0V

Software engineering, what is modular system ? list important properties of...

what is modular system ? list important properties of modular system

Bi polar junction transistor, draw input and output charectoristics of BJT ...

draw input and output charectoristics of BJT and justify CE configuration provides large current amplification

What are conditional chain statement, What are conditional chain statement?...

What are conditional chain statement? ON CHAIN-INPUT similar to ON INPUT. The ABAP/4 module is called if any one of the fields in the chain having a value other than its in

What are the uses of interrupts, What are the uses of interrupts?  ...

What are the uses of interrupts?  Recovery from errors Debugging Communication among programs Use of interrupts in operating system

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