上升沿D触发器描述 方法一:使用信号属性函数 LIBRARY IEEE: USE IEEE STD LOGIC 1164ALL: ENTITY D reg Is PORTO, CP: IN STD LOGIC; Q: OUTSTD LOGIC); END D reg ARCHITECTURE test OFD reg Is BEGIN PROCESS(CP) BEGIN IF(CPEVENT AND CP=D)THEN Q<=D; END PROCESS END test:上升沿D触发器描述 方法一：使用信号属性函数 LIBRARY IEEE; USE IEEE.STD_LOGIC_1164.ALL; ENTITY D_reg IS PORT(D,CP:IN STD_LOGIC; Q:OUT STD_LOGIC); END D_reg; ARCHITECTURE test OF D_reg IS BEGIN PROCESS(CP) BEGIN IF (CP’EVENT AND CP=‘1’) THEN Q<=D; END PROCESS; END test;