Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.
Can you explain in your own words what combinational logic is, and how it is different from any other type of logic you can think of? That should get you in the right direction of an answer.
1- Combination logic is better to avoid in cases because it will cause the delay between the sequential components to increase, if place between the sequential components, hence reducing the optimum frequency for the design
2- Combinational feedback loop are difficult to tackle with than sequential feedback, hence wherever possible avoid combination feedback loop(coz of issues like race etc.)
But it is only when you can choose between selecting sequential and combinational logic, not always...Of course things vary case to case....: )
Come on, You cannot avoid Combinational logic!!!.
Without combinational logics, there is no single device on earth could work.....I think you did not understand it fully. Combo logics are always there...It is the user how to properly route it.
In synchronous design, what's important is the propagation delay from one flop to the next flop through combinatorial logics and routes. That is because it determines how fast the circuit can run.
For example, if we have a design and if there is a long combinatorial path between two flops, that path will be the critical path of the design. In other words, that will limit the max clock frequency the design can run.
Breaking a combinatorial design and inserting flops in between is called pipelining. You can find more reference on it by searching online.
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.
