library IEEE;
use IEEE.STD_LOGIC_1164.ALL;
use IEEE.STD_LOGIC_ARITH.ALL;
use IEEE.STD_LOGIC_UNSIGNED.ALL;
-- Uncomment the following lines to use the declarations that are
-- provided for instantiating Xilinx primitive components.
--library UNISIM;
--use UNISIM.VComponents.all;
entity exprience1 is
Port ( cs : in std_logic;
wr : in std_logic;
rd : in std_logic;
data : inout std_logic_vector(3 downto 0)
--signal tmp: inout std_logic_vector(3 downto 0));
);
end exprience1;
architecture Behavioral of exprience1 is
signal tmp: std_logic_vector(3 downto 0);
begin
reg:process(cs, wr, rd)
begin
if(cs = '1' and wr = '1') then
tmp <= data;
elsif(cs = '1' and rd = '1') then
data <= tmp;
else data <= "ZZZZ";
end if;
end process reg;
end Behavioral;
用vhdl语言实现寄存器
最新推荐文章于 2025-10-03 04:28:14 发布
这篇博客介绍如何利用VHDL语言实现一个寄存器。代码中展示了实体exprience1的定义,包括输入输出端口以及行为架构。在行为架构中,通过进程process实现了当片选cs和写使能wr为高时的数据存储,以及当片选cs和读使能rd为高时的数据读取功能。

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