vhdl设计38译码器
时间: 2023-05-18 07:03:43 浏览: 99
这是一个编程类的问题,我可以回答。以下是一个简单的 VHDL 设计 3-to-8 译码器的代码:
```
library ieee;
use ieee.std_logic_1164.all;
entity decoder_3to8 is
port (
input : in std_logic_vector(2 downto 0);
output : out std_logic_vector(7 downto 0)
);
end entity decoder_3to8;
architecture behavioral of decoder_3to8 is
begin
process (input)
begin
case input is
when "000" =>
output <= "00000001";
when "001" =>
output <= "00000010";
when "010" =>
output <= "00000100";
when "011" =>
output <= "00001000";
when "100" =>
output <= "00010000";
when "101" =>
output <= "00100000";
when "110" =>
output <= "01000000";
when "111" =>
output <= "10000000";
when others =>
output <= "00000000";
end case;
end process;
end architecture behavioral;
```
这个代码实现了一个 3-to-8 译码器,它将 3 位输入转换为 8 位输出。输入和输出都是 std_logic_vector 类型的信号。在 process 中,使用 case 语句对输入进行匹配,并将相应的输出赋值给 output 信号。如果输入不匹配任何一个 case,则输出全为 0。