dou.vhd

来自「智能化微机测量和控制技术的迅速发展和广泛应用己经渗透到国民经济的各个部门。不但国」· VHDL 代码 · 共 23 行

------同步消除抖动模块 
library ieee; 
use ieee.std_logic_1164.all; 
-------------------------------
entity dou is 
port(din,clk:in std_logic; 
dout:out std_logic); 
end dou; 
----------------------------------
architecture dou_arc of dou is 
signal x,y:std_logic; 
begin 
process(clk) 
begin 
if clk'event and clk='1'then 
x<=din; 
y<=x; 
end if; 
dout<=x and(not y); ----din=‘1’超过一个时钟周期，x=1，y=1，dout=1
end process; 
end dou_arc;