verilog - Can we have an array of custom modules?

Question

Can we have an array of instances for a custom module?

For example: we can have input [15:0] a; - this creates a bus. Can we do same thing for custom modules, i.e. DFF [15:0] d;, where DFF is a custom module? Here I intend to create 16 instances of the DFF module.

Answer 1

Verilog arrays of instances were added in Verilog-1995 (IEEE 1364-1995). They can be used with gates, user-defined primitives, and modules. Generates, which are more powerful but also more complex, were added in Verilog-2001.

Here is an example array of module instances:

DFF d[15:0] (clk, DFF_i, DFF_o);

For each port connection, if the size matches that of the formal parameter then it is connected to every instance. Otherwise each instance is connected to a part-select (or bit-select) of the expression.