decoder3to8.vbe

来自「i need of vhdl code for 32-bit risc proc」· VBE 代码 · 共 21 行

ENTITY decoder3to8 IS
PORT (
input : IN bit_vector ( 2 downto 0 );
output : OUT bit_vector ( 7 downto 0 )
);
END decoder3to8;


ARCHITECTURE decoder3to8_arch OF decoder3to8 IS

BEGIN

output(0) <= ( (NOT (input(2)) ) AND (NOT (input(1))) AND (NOT(input(0))) );
output(1) <= ( (NOT (input(2)) ) AND (NOT (input(1))) AND input(0) );
output(2) <= ( (NOT (input(2)) ) AND input(1) AND (NOT(input(0))) );
output(3) <= ( (NOT (input(2)) ) AND input(1) AND input(0) );
output(4) <= ( input(2) AND (NOT (input(1))) AND (NOT(input(0))) );
output(5) <= ( input(2) AND (NOT (input(1))) AND input(0) );
output(6) <= ( input(2) AND input(1) AND (NOT(input(0))) );
output(7) <= ( input(2) AND input(1) AND input(0) );
END;