Understanding the Difference Between an Always Block and a Procedural Block in SystemVerilog

In SystemVerilog, an always block and a procedural block are commonly used constructs in hardware description languages. The focus keyword for this question is "SystemVerilog."

Always Block

An always block is used to model sequential logic in SystemVerilog. It executes continuously, triggering whenever its sensitive event occurs. The code inside the always block is executed whenever the event (posedge, negedge, level-sensitive, or combination) happens.

Procedural Block

A procedural block, on the other hand, is used to model combinational logic in SystemVerilog. It executes in a procedural order, with the code inside the block executed sequentially. Procedural blocks can be conditional (if-else statements), loops (for, while), or sequential statements (assign, case).

Understanding the difference between an always block and a procedural block is crucial in designing efficient and accurate hardware description models in SystemVerilog.