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Can we instantiate module inside always block?
Hardware modules may not be instantiated inside an always block. Likewise, modules are considered to be separate hardware blocks that operate in parallel. Functions, however, can be instantiated in an always block.
How will you instantiate a module?
A module can be instantiated in another module thus creating hierarchy. Module instantiation consists of module_name followed by instance_name and port_association_list. Need of instance_name is, we can have multiple instance of same module in the same program.
What are the different ways of association of ports in module instantiation?
Port mapping in module instantiation can be done in two different ways:
- Port mapping by order.
- Port mapping by name.
Can initial block be synthesized?
Initial blocks can be used in either synthesizable or non-synthesizable blocks. They are commonly used in test benches. However, initial blocks cannot be synthesized in ASICs or CPLDs. Initial and always block describe independent processes, which means the statements in one process execute autonomously.
What is difference between initial and always block?
The always block indicates a free-running process, but the initial block indicates a process executes exactly once. Both constructs begin execution at simulator time 0, and both execute until the end of the block. Initial blocks can be used in either synthesizable or non-synthesizable blocks.
Is there any way to instantiate a module inside the always blocks in..?
In both such cases, generate block comes handy. You can use parameters and localparams for conditions and iterations in a generate block. I have tried instantiating a module inside the always block , but when compiled using iverilog it gives an error.
Do you need Quartus to generate a block?
This has always been an optional feature for generate blocks, though it is highly recommended. Quartus should not be giving an error. This is equivalent to the generate block above assuming that a, b, and out being passed are declared as [9:0].
How are bits passed from a module to an instance?
For example if a, b, and out are declared [19:0], then every 2 bits will be passed to each instance, and it is assumed they are declared as [1:0] within the module status. Thanks for contributing an answer to Stack Overflow!