What is SystemVerilog used for?

What is SystemVerilog used for?

SystemVerilog, standardized as IEEE 1800, is a hardware description and hardware verification language used to model, design, simulate, test and implement electronic systems.

What is the use of interface in SystemVerilog?

Interfaces are a major new construct in SystemVerilog, created specifically to encapsulate the communication between blocks, allowing a smooth refinement from abstract system-level through successive steps down to lower RTL and structural levels of the design.

Why SV is better than Verilog?

Verilog is a Hardware Description Language (HDL).
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Difference between Verilog and SystemVerilog :

S.No.	VERILOG	SYSTEMVERILOG
06.	Verilog is influenced by C language and Fortran programming language.	SystemVerilog is based on Verilog, VHDL and c++ programming language.
07.	It has file extension .v or .vh	It has file extension .sv or .svh

What are the data types in Verilog?

Verilog supports only predefined data types. These include bits, bit-vectors, memories, integers, reals, events, and strength types. These define the domain of description in Verilog.

What is difference between interface and virtual interface in SV?

An interface is a bundle of signals or nets through which a testbench communicates with a design. A virtual interface is a variable that represents an interface instance.

What is polymorphism in SV?

Polymorphism in SystemVerilog is the ability for the same code to behave differently depending on the kind of Object with which it is dealing. This is a fundamental concept in every Object Oriented Programming language. Polymorphism in SystemVerilog is another important aspect of any OOPs in system Verilog.

Is Verilog an RTL?

RTL is an acronym for register transfer level. This implies that your Verilog code describes how data is transformed as it is passed from register to register. The transforming of the data is performed by the combinational logic that exists between the registers. Don’t worry!

What are 4-state data types?

Verilog’s variable types are four-state: each bit is 0,1,X or Z.
Integer and Real Types.

TYPE	Description	Example
byte	8 bits, signed	byte a, b;
shortint	16 bits, signed	shortint c, d;
int	32 bits, signed	int i,j;

Why time is 4-state data types?

The time datatype is 4-state because Verilog only had 4-state integers. In Verilog, time and integer were similar types except that their size were platform dependent. SystemVerilog fixed time as a 64-bit unsigned integer, and integer as 32-bits.

Why interface is static in SV?

SystemVerilog module, interface, and package all comes under category of modules with more or less advantages of ‘module’ construct. And that’s why interface is static.

What is the difference between Always_comb () and always@ *?

always_comb is sensitive to changes within the contents of a function, whereas always @* is only sensitive to changes to the arguments of a function.

What is callback in SV?

A callback is a way to inject a new code in a file (in most of the cases it’s a driver) from testcase, without modifying the original file. The one application of callback is to inject an error.

What are the types of polymorphism in SystemVerilog?

SystemVerilog enables polymorphism in two different ways: statically, at compile time, using parameterized classes and dynamically, at run-time, using virtual methods.

What does RTL mean?

In digital circuit design, register-transfer level (RTL) is a design abstraction which models a synchronous digital circuit in terms of the flow of digital signals (data) between hardware registers, and the logical operations performed on those signals.

What is RTL and HDL?

rtl means register transfer logic. hdl means hardware discription language. basicallly rtl is the representation of a hardware in higher level of abstraction in text format interms of high level language llike if else statemant etc. the hdl is one of the way to write rtl code.

What is the difference between == and === in SV?

== tests logical equality (tests for 1 and 0, all other will result in x) === tests 4-state logical equality (tests for 1, 0, z and x)

What is the size of real in SV?

64-bit

The real variables are stored as 64-bit quantities, and store the real values. Real numbers can be specified in either decimal notation (for example, 14.72) or in scientific notation (for example, 39e8).

What is mailbox in SV?

A SystemVerilog mailbox is a way to allow different processes to exchange data between each other. It is similar to a real postbox where letters can be put into the box and a person can retrieve those letters later on. SystemVerilog mailboxes are created as having either a bounded or unbounded queue size.

What is always (*) in Verilog?

In Verilog, the always block is one of the procedural blocks. Statements inside an always block are executed sequentially. An always block always executes, unlike initial blocks that execute only once at the beginning of the simulation. The always block should have a sensitive list or a delay associated with it.

Why callbacks are used in UVM?

A callback in UVM is a mechanism for changing the behavior of a verification component (such as a driver or monitor) without actually changing the code of the component.

What is coverage and what are different types in SV?

Coverage is used to measure tested and untested portions of the design. Coverage is defined as the percentage of verification objectives that have been met. There are two types of coverage metrics, Code Coverage. Functional Coverage.

Why do we use polymorphism in SV?

Polymorphism allows the use of a variable of the base class type to hold subclass objects and to reference the methods of those subclasses directly from the superclass variable. It also allows a child class method to have a different definition than its parent class if the parent class method is virtual in nature.

What is difference between polymorphism and inheritance?

Inheritance is a property pertaining to just classes whereas, polymorphism extends itself into any method and/or function. Inheritance allows the derived class to use all the functions and variables declared in the base class without explicitly defining them again.

What is RTL example?

The most popular example of RTL Design is that of a Processor, which is nothing but a very sophisticated Finite State Machine with a very large number of states. In RTL Design the basic building blocks are registers, Multiplexers, Adders.

What is RTL and LTR?

The main difference between left-to-right (LTR) and right-to-left (RTL) language scripts is the direction in which content is displayed: LTR languages display content from left to right. RTL languages display content from right to left.