Design compiler virtual clock

What is Synopsys Fusion compiler?
The elaborate command translate the design into a technology-independent design (GTECH) from the intermediate files produced during analysis.
Optimization Constraints You define this explicit constraints ..
What is the difference between virtual and real clock?
A general clock defines as a clock signal that synchronizes the state transitions by keeping all the state elements in synchronization.
While virtual clocks define as Input and output delays are used to relate the arrivals at input and output ports with regard to a virtual clock in order to restrict the interface pins..
What is the difference between virtual clock and real clock?
A general clock defines as a clock signal that synchronizes the state transitions by keeping all the state elements in synchronization.
While virtual clocks define as Input and output delays are used to relate the arrivals at input and output ports with regard to a virtual clock in order to restrict the interface pins..
What is the use of virtual clock in synthesis?
A virtual clock is used as a reference to constrain the interface pins by relating the arrivals at input/output ports with respect to it with the help of input and output delays..
What is virtual clock in SDC?
Stating more clearly, a virtual clock is a clock that has been defined, but has not been associated with any pin/port.
A virtual clock is used as a reference to constrain the interface pins by relating the arrivals at input/output ports with respect to it with the help of input and output delays..
Why do we create virtual clock?
Virtual clock help in understanding the delays & time taken by different aspects of your design.
If also help in minimizing the delays in your design..
Why do we need virtual clocks?
Virtual clock help in understanding the delays & time taken by different aspects of your design.
If also help in minimizing the delays in your design.
In VLSI, what is static timing analysis? There are basically three types of constraints within an IC which are Timing,Power and Area..
Clocks are an essential part of VLSI (Very Large Scale Integration) design because they provide a time reference for the digital circuits that make up an electronic system.

Jun 24, 2023Virtual clocks are not synthesised and are not real clocks. When there is a feedthrough. passing through two blocks, the feedthrough path needs Missing: compiler | Show results with:compiler

We need to create what is known as a 'virtual' clock. The virtual clock would be analagous to a system clock that all of the signals in your design would be '

How do I create a virtual clock in design compiler?

In the design_vision command window:

This creates a virtual clock with a 40 ns period

50% duty cycle = 25MHz clock.
This clock will be used to constraint the data paths between flip flops in your design.
By default, Design Compiler assumes that clock networks have no delay (ideal clocks).

How to define a virtual clock using SDC command?

How to define a virtual clock:

The most simple sdc command syntax to define a virtual clock is as follows:

The above SDC command will define a virtual clock “VCLK” with period 10 ns.
Purpose of defining a virtual clock:The advantage of defining a virtual clock is that we can specify desired latency for virtual clock.

What if a design doesn't have a clock?

If you're design doesn't have a clock at all, then it is purely 'combinational' logic.
We need to create what is known as a 'virtual' clock.
The virtual clock would be analagous to a system clock that all of the signals in your design would be 'measured' against. b) if your design DOES have a clock pin, follow this step.

Why do we define a virtual clock?

Similarly for output ports, the tool needs to know the frequency of the flop capturing the signal.
This is why we define a virtual clock.
To give a clock relationship to paths going through IO ports.
Thanks for you precise answer to my question.
Also I have posted one more question regarding timing.

Design compiler virtual clock

What is Synopsys Fusion compiler?

What is the difference between virtual and real clock?

What is the difference between virtual clock and real clock?

What is the use of virtual clock in synthesis?

What is virtual clock in SDC?

Why do we create virtual clock?

Why do we need virtual clocks?

How do I create a virtual clock in design compiler?

How to define a virtual clock using SDC command?

What if a design doesn't have a clock?

Why do we define a virtual clock?