- verilog - What does always block @ (*) means? - Stack Overflow
The (*) means "build the sensitivity list for me" For example, if you had a statement a = b + c; then you'd want a to change every time either b or c changes In other words, a is "sensitive" to b c So to set this up: always @( b or c ) begin a = b + c; end But imagine you had a large always block that was sensitive to loads of signals Writing the sensitivity list would take ages In fact
- Whats included in a Verilog always @* sensitivity list?
So, always use "always @*" or better yet "always_comb" and forget about the concept of sensitivity lists If the item in the code is evaluated it will trigger the process Simple as that It an item is in an if else, a case, assigned to a variable, or anything else, it will be "evaluated" and thus cause the process to be triggered
- Verilog Always block using (*) symbol - Stack Overflow
The always @(*) syntax was added to the IEEE Verilog Std in 2001 All modern Verilog tools (simulators, synthesis, etc ) support this syntax Here is a quote from the LRM (1800-2009): An incomplete event_expression list of an event control is a common source of bugs in register transfer level (RTL) simulations The implicit event_expression, @*, is a convenient shorthand that eliminates these
- Verilog: Difference between `always` and `always - Stack Overflow
Is there a difference between an always block, and an always @* block?
- Difference among always_ff, always_comb, always_latch and always
I am totally confused among these 4 terms: always_ff, always_comb, always_latch and always How and for what purpose can these be used?
- Always vs forever in Verilog HDL - Stack Overflow
The always construct can be used at the module level to create a procedural block that is always triggered Typically it is followed by an event control, e g , you might write, within a module, something like: always @(posedge clk) <do stuff> always @(en or d) <do stuff> always @* <do stuff>, can also use @(*) This is the typical way to write latches, flops, etc The forever construct, in
- verilog - Use of forever and always statements - Stack Overflow
The difference between forever and always is that always can exist as a "module item", which is the name that the Verilog spec gives to constructs that may be written directly within a module, not contained within some other construct initial is also a module item always blocks are repeated, whereas initial blocks are run once at the start of
- Verilog (assign in always) - Stack Overflow
Always use blocking assignments for combinatorial or level-sensitive code, as well a clock assignments Always use non-blocking assignments for variables that are written on a clock edge, and read on the same clock edge in another process
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