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Don’t cares are not allowed in the "case" statement. Therefore casex or casez are required. Casex will automatically match any x or z with anything in the case statement. Casez will only match z’s -- x’s require an absolute match. Verilog interview Questions 24)Given the following Ver...
Don’t cares are not allowed in the "case" statement. Therefore casex or casez are required. Casex will automatically match any x or z with anything in the case statement. Casez will only match z’s -- x’s require an absolute match. Verilog interview Questions 24)Given the following Ver...
NOTE :As a good coding practice, there should be only one port identifier per line, as shown below Examples : Port Declaration 1inputclk ;// clock input2input[15:0] data_in ;// 16 bit data input bus3output[7:0] count ;// 8 bit counter output4inoutdata_bi ;// Bi-Directional da...
the configuration to be passed to the group must be available in the class constructor only. So user has to get the configuration in class constructor only and OVM phases cannot be exploited much here. It should also be noted here that as per common coding practice, we always set and get...
参考自https://stackoverflow.com/questions/22070608/why-using-zero-timing-0in-verilog-is-not-good-practicea. designer通常使用#0来避免两个过程块之间存在竞争,#0 会使进程暂停,并在其他的block结束后,在Inactive region开始执行,这样带有#0的block就是最后执行的,但如果有多个block都加了#0,那么谁是最后执...
Zynq requires PS7 block PS7 [DRC ZPS7-1] PS7 block required: The PS7 cell must be used in this Zynq design in order to enable correct default configuration. I'm new at Verilog coding, so please let m know what is the problem....
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 ...
在verilog基础上,SV增加了二值逻辑(0、1)变量来简化运算, 包含 bit, byte, shortint, int, longint 变量。 SV中logic与verilog中的reg变量对应,为四值逻辑的无符号数;bit为二值逻辑的无符号数; byte, int, shortint, longint 均为二值逻辑有符号数,注意区分。
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 ...