esTc 设计中 简单门电路设计 三输入与门 方法一:布尔表达式 方法二:逻辑真值描述
设计中心 简单门电路设计 • 三输入与门 方法一：布尔表达式 方法二：逻辑真值描述
esTc 设计中 方法一:布尔表达式 IBRARY EEE. USE EEE STD LOG1C 1164.ALLI ENTITY and3 Is PORT(a, b, C: IN STD_ LOGIC; y: OUT STD LOGIC); END and3 ARCHITECTURE and3 oF and3 s BEGIN y <=(a AND b AND C); END and3 1
设计中心 方法一：布尔表达式 LIBRARY IEEE; USE IEEE.STD_LOG1C_1164.ALL; ENTITY and3 IS PORT (a, b, c : IN STD_LOGIC; y : OUT STD_LOGIC); END and3; ARCHITECTURE and3_1 OF and3 IS BEGIN y <= (a AND b AND c) ; END and3_1;
esTc 设计中 方法二:逻辑真值描述 LIBRARY EEE. USE EEE STD LOGIC 1164ALL ENTITY and3 S PORT (a, b, C: IN STD LOGIC; y: OUT STD_ LOGIC) END and3. ARCHITECTURE and3 2 oF and3 s BEGIN t4: PROCESS (a, b, c) VARIABLE comb: STD_ LOGIC_ VECTOR(2 DOWNTO 0); BEGIN comb=a&b&CI
设计中心 方法二：逻辑真值描述 LIBRARY IEEE; USE IEEE STD_LOGIC_1164.ALL; ENTITY and3 IS PORT (a，b，c : IN STD_LOGIC; y : OUT STD_LOGIC); END and3; ARCHITECTURE and3_2 OF and3 IS BEGIN t4: PROCESS (a，b，c) VARIABLE comb:STD_LOGIC_VECTOR(2 DOWNTO 0); BEGIN comb := a & b & c;
esTc 设计中 方法二:逻辑真值描述线) CASE comb Is WHEN“000”=>y<=0 WHEN“001”=>y<=0; WHEN“010”=>y≤=0 WHEN“011”=>y<=03 WHEN“100”=>y≤=0 WHEN“101”=>y≤=0 WHEN“110”=>y≤=0; WHEN“111”=>y<= WHEN OTHERS>y <=X END CASE END PROCESS END and3 2
设计中心 方法二：逻辑真值描述(续) CASE comb IS WHEN “000” => y <=‘0’; WHEN “001” => y <=‘0’; WHEN “010” => y <=‘0’; WHEN “011” => y <=‘0’; WHEN “100” => y <=‘0’; WHEN “101” => y <=‘0’; WHEN “110” => y <=‘0’; WHEN “111” => y <=‘1’; WHEN OTHERS=> y <=‘X’; END CASE; END PROCESS; END and3_2;
esTc 设计中 编码译码器设计 三八译码器 优先级编码器
设计中心 编码译码器设计 • 三八译码器 • 优先级编码器