?? bcdtob3.vhd
字號(hào):
LIBRARY IEEE;
USE IEEE.STD_LOGIC_1164.ALL;
ENTITY BCDTOB3 IS
PORT
(
NUM :IN STD_LOGIC_VECTOR(3 DOWNTO 0);
CO :OUT STD_LOGIC_VECTOR(15 DOWNTO 0));
END;
ARCHITECTURE A OF BCDTOB3 IS
BEGIN
PROCESS
BEGIN
CASE NUM IS
WHEN"0000"=>CO<="0000000000000000";
WHEN"0001"=>CO<="0000000001100100";
WHEN"0010"=>CO<="0000000011001000";
WHEN"0011"=>CO<="0000000100101100";
WHEN"0100"=>CO<="0000000110010000";
WHEN"0101"=>CO<="0000000111110100";
WHEN"0110"=>CO<="0000001001011000";
WHEN"0111"=>CO<="0000001010111100";
WHEN"1000"=>CO<="0000001100100000";
WHEN"1001"=>CO<="0000001110000100";
WHEN OTHERS=>CO<="0000000000000000";
END CASE;
END PROCESS;
END;
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