T触发器与T27触发器ppt课件

END basic_tff;
ARCHITECTURE rtl OF basic_tff IS SIGNAL q_temp:std_logic;
BEGIN PROCESS(CP) BEGIN IF(CP'event AND CP ='1')THEN IF(T ='1')THEN q_temp <= NOT q_temp; ELSE q_temp <= q_temp; END IF; END IF; END PROCESS; Q <= q_temp; QB <= NOT q_temp;
END Extended_tff;
ARCHITECTURE rtl OF Extended_tff IS SIGNAL q_temp:std_logic;
BEGIN PROCESS(CP) BEGIN IF(CP'event AND CP ='1') THEN q_temp <= NOT q_temp; ELSE q_temp <= q_temp; END IF; END PROCESS; Q <= q_temp; QB <= NOT q_temp;
END rtl;
4
T’触发器功能概述
CP
CP=0时，处于维持状态 CP=1时，次态与现态相反：触发器翻转
5
T’触发器实验编码
LIBRARY IEEE; USE IEEE.std_logic_1164.ALL;
ENTITY Extended_tff IS PORT( CP :IN std_logic; Q :OUT std_logic; QB:OUT std_logic);
END rtl;
6
演示完毕，谢谢
• 制作人：仝珂
7
T
Qn+1
0
Qn
1
NOT(Qn)
T触发器激励表
Qn Qn+1
T
0
0
0
0
1
1
1
0
1
1
1

0
3
T触发器实验编码
LIBRARY IEEE; USE IEEE.std_logic_1164.ALL;
ENTITY basic_tff IS PORT( T : IN std_logic; CP: IN std_logic; Q : OUT std_logic; QB: OUT std_logic );
VHDL实验之
T触发器与T’触发器
实验环境：Windows XP 仿真软件：Quartus II v5.0 设计方法：行为描述法
1
T触发器功能概述
• CP=0时，触发器不工作，处于维持状态 • CP=1时，触发器的功能如下：
• T=0时，次态=现态; • T=1时，次态与现态相反：触发器翻转
2
T触发器状态转移真值表