Can delay be synthesised in Verilog?

Can delay be synthesised in Verilog?

But delays have to be multiples of the clock of that element. Usually you find things such as “after 10 ns” theses are propagation delays. When doing an ideal simulation on a Verilog simulator, outputs happen exactly when the inputs change. This is not realistic and does not describe the way real hardware work.

Can delays be synthesized?

I have always read that delays declared in a RTL code can never be synthesized. They are meant only for simulation purpose and modern synthesis tools will just ignore delays declarations in the code. For example: x = #10 y; will be considered as x = y; by the synthesis tool.

How to create delay in Verilog?

Verilog gate delays specify how values propagate through nets or gates….The output looks like:

1. ncsim> run.
2. T=0 a=0 b=0 and=x bufif0=x.
3. T=4 a=0 b=0 and=0 bufif0=x.
4. T=7 a=0 b=0 and=0 bufif0=0.
5. T=10 a=1 b=0 and=0 bufif0=0.
6. T=16 a=1 b=0 and=0 bufif0=1.
7. T=20 a=1 b=1 and=0 bufif0=1.
8. T=23 a=1 b=1 and=1 bufif0=1.

Which delay is also called as a blocking delay?

Intra assignment delay indicates that the statement itself is executed after the delay expires, and it is the most commonly used form of delay control. They can be used with blocking and non-blocking assignments. Then, the statement’s execution will be suspended until the time specified by the delay control expires.

Why are delay declarations cannot be synthesized in Verilog?

They are meant only for simulation purpose and modern synthesis tools will just ignore delays declarations in the code. For example: x = #10 y; will be considered as x = y; by the synthesis tool. What are the reasons delay declarations in any hardware description language (for example, VHDL, Verilog or Sytem-Verilog) cannot be synthesized?

Why do you not see Clock toggle in Verilog?

The reason you don’t see the clock toggle is because you remove the time delay you are changing prior assignments to intermediate assignments. Intermediate assignments are only visible within the procedural block that assigns it. All other concurrent logic will only see the final assignments.

Can a delay declaration in VHDL be synthesized?

Can someone please explain the reasons, as to why delay declarations in any hardware description language (i.e. VHDL, Verilog or Sytem-Verilog) cannot be synthesized? There is no such thing as code that can never be synthesized. If you can write code that can be compiled and executed on a piece of hardware, it can be synthesized into hardware.

Can a synthesis tool ignore delays in code?

They are meant only for simulation purpose and modern synthesis tools will just ignore delays declarations in the code. For example: x = #10 y; will be considered as x = y; by the synthesis tool.