SystemVerilog

Constrained randomization is a methodology used in SystemVerilog verification to generate randomized test stimuli that are both realistic and comprehensive. Constrained randomization is based on the idea of generating random input values that are constrained by specific rules or constraints, ensuring that the generated stimuli are realistic and meaningful. Constrained randomization is typically used in … Read more

In SystemVerilog, user-defined data types can be defined using typedef or struct statements. User-defined data types are useful for creating custom data types that can be used in a hardware design or verification environment. Here is an example of a typedef statement: typedef logic [7:0] byte_t; In this example, a new data type “byte_t” is … Read more

In SystemVerilog, a virtual interface is a construct that is used to model the communication between two modules or components in a hardware system. A virtual interface provides a way to connect two modules or components that are physically or logically separated, allowing them to communicate as if they were directly connected. A virtual interface … Read more

In SystemVerilog, initial blocks and always blocks are used to specify the behavior of a module or a hardware system. Both initial and always blocks are procedural blocks that are executed sequentially, but there are some key differences between the two. Initial blocks are used to specify the initial values of signals and variables when … Read more

In SystemVerilog, there are four types of delays that can be used to model the timing behavior of a hardware system: inertial, transport, pure, and delay control. Each type of delay is used under different circumstances and has its own characteristics. 1. Inertial delay: An inertial delay is used to model the behavior of a … Read more

In SystemVerilog, a module is a hardware component that can be instantiated and connected to other modules or components to form a larger system. Here is an example of a module definition: module my_module(input a, output b); // module implementation endmodule To instantiate a module in SystemVerilog, you use the module name followed by the … Read more

There are several methodologies used for SystemVerilog verification, including constrained-random verification, assertion-based verification, and coverage-driven verification. Each methodology has its own strengths and weaknesses and is suited for different types of designs and verification goals. One popular methodology used for SystemVerilog verification is the Universal Verification Methodology (UVM). UVM is a standardized methodology that provides … Read more

Functional coverage is a methodology used in SystemVerilog to measure the completeness of the verification process by tracking how much of the design functionality has been exercised during simulation. Functional coverage is used to ensure that all possible scenarios and use cases of a design have been tested, and to identify any areas of the … Read more

Assertion-based verification (ABV) is a methodology used in SystemVerilog to verify the functional correctness of a design by writing assertions. Assertions are statements that express a design property or behavior that must be true at a certain point in time during simulation. If the assertion is violated, the simulation will stop and report an error, … Read more

In SystemVerilog, a clocking block is a construct that is used to model clock signals in a hardware system. Clocking blocks provide a way to model the behavior of clock signals, including their timing and synchronization, and to specify the clock domains in a design. A clocking block is defined using the “clocking” keyword, followed … Read more