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Altera_Forum
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16 years ago

Confusion on signal attribute HIGH

Hello, I have a probleb understanding the attribute HIGH. I googled and I can understand what it means and how it applies to certain cases. But I am trying to figured out an IP and it is essen...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
16 years ago

the 'high attribute returns either the highest value of a type, or the highest index in an array type:

signal slv0 : std_logic_vector(10 downto 0);

signal slv1 : std_logic_vector(3 to 99);

subtype myint0 is integer range -10 to 17;

subtype myint1 is natural range 18 to 66;

type sometype is (A, B, C, D, E);

slv0'high = 10

slv1'high = 99

myint0'high = 17

myint1'high = 66

sometype'high = E