To clear an interview for the profile that requires Verilog, one must be thoroughly familiar with the concepts. The following set of questions will enable you to have good knowledge about it. Top Verilog Interview Questions for 2025 1. What are Verilog parallel case and full case statements?
(Verilog interview questions that is most commonly asked) The Verilog language has two forms of the procedural assignment statement: blocking and non-blocking. The two are distinguished by the = and <= assignment operators. The blocking assignment statement (= operator) acts much like in traditiona...
In practice it is the worst thing to do, so please avoid comparing with X and Z. Limit your design to two states, 0 and 1. Use tri-state only at chip IO pads level. We will see this as an example in the next few pages.
NOTE : As a good coding practice, there should be only one port identifier per line, as shown below Examples : Port Declaration 1 input clk ; // clock input 2 input [15:0] data_in ; // 16 bit data input bus 3 output [7:0] count ; // 8 bit counter output 4 inout data_bi...
Verilog generate statement is a powerful construct for writing configurable, synthesizable RTL. It can be used to create multiple instantiations of modules and code, or conditionally instantiate blocks of code. However, many Verilog programmers often have questions about how to use Verilog generate effe...
NEVERput a blocking statement inside of a structural logic block. In other words, NEVER put an "=" inside of an always block. Even if you are only changing one output it is poor practice to use a blocking statement. ALWAYSuse a blocking statement when using the "assign" keyword. These ...
It is a generally good practice to register signals in the source clock domain before sending them across the clock domain crossing (CDC) into synchronizers. This eliminates combinational glitches, which can effectively increase the rate of data crossing the clock boundary, reducing MTBF of the sync...
[DRC PDRC-153] Gated clock check: Net SSG_AN_reg[0]_i_2_n_0 is a gated clock net sourced by a combinational pin SSG_AN_reg[0]_i_2/O, cell SSG_AN_reg[0]_i_2. This is not good design practice and will likely impact performance. ...
First ask yourself the questions: Why are the full_case parallel_case synthesis directives so dangerous? And is there a way to avoid the danger while retaining their positive capabilities? 2.1 The full_case parallel_case dangers The full_case and parallel_case directives are dangerous because ...
within a module and this makes the module have a different set of parameters at compile time. A parameter can be modified with thedefparamstatement or in the module instance statement. It is a common practice to use uppercase letters in names for the parameter to make them instantly ...