?? bcdtob1.vhd
字號:
LIBRARY IEEE;
USE IEEE.STD_LOGIC_1164.ALL;
ENTITY BCDTOB1 IS
PORT
(
NUM :IN STD_LOGIC_VECTOR(3 DOWNTO 0);
CO :OUT STD_LOGIC_VECTOR(15 DOWNTO 0));
END;
ARCHITECTURE A OF BCDTOB1 IS
BEGIN
PROCESS
BEGIN
CASE NUM IS
WHEN"0000"=>CO<="0000000000000000";
WHEN"0001"=>CO<="0000000000000001";
WHEN"0010"=>CO<="0000000000000010";
WHEN"0011"=>CO<="0000000000000011";
WHEN"0100"=>CO<="0000000000000100";
WHEN"0101"=>CO<="0000000000000101";
WHEN"0110"=>CO<="0000000000000110";
WHEN"0111"=>CO<="0000000000000111";
WHEN"1000"=>CO<="0000000000001000";
WHEN"1001"=>CO<="0000000000001001";
WHEN OTHERS=>CO<="0000000000000000";
END CASE;
END PROCESS;
END;
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