c<='0';
end if;
end if;
end process;
end Behavioral;
(
2)6 进制计数器仿真
3.
6 进制计数器设计与仿真
(
1)24 进制计数器 VHDL 程序
--文件名:counter24.vhd。
--功能:24 进制计数器。
--最后修改日期:2004.3.20
library IEEE;
use IEEE.STD_LOGIC_1164.ALL;
use IEEE.STD_LOGIC_ARITH.ALL;
use IEEE.STD_LOGIC_UNSIGNED.ALL;
entity counter24 is
Port ( clk : in std_logic;
reset : in std_logic;
din : in std_logic_vector(5 downto 0);
dout : out std_logic_vector(5 downto 0));
end counter24;
architecture Behavioral of counter24 is
signal count : std_logic_vector(5 downto 0);
begin
dout <= count;
process(clk,reset,din)
begin
if reset= '0' then
count <= din;
elsif rising_edge(clk) then
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