Generic Map

• Used to define the values of generics.

• Usually given in an Instance, but may also appear in a configuration.

Syntax

generic map ([Formal =>] Actual, ...)

Formal = {either} Name FunctionCall
Actual = Expression

Where :

Label : ComponentName port map (…);
for - use - port map (…)
block – generic (…); ;port – begin - end

Rules :

The two forms of syntax (ordered list or explicitly named choices) can be mixed, but the ordered list must come before the named choices.

NOTE: A generic map does not end with a semicolon!

Example:

architecture Structure of Ent is component NAND2
generic (TPLH, TPHL: TIME := 0 NS);
port (A, B: in STD_LOGIC;
F : out STD_LOGIC);
end component;
begin
G1: NAND2 generic map (1.9 NS, 2.8 NS)
port map (N1, N2, N3);
G2: NAND2 generic map (TPLH => 2 NS, TPHL => 3 NS)
port map (N4, N5, N6);
end
Structure;

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