何时 PROCESS被执行? 进程敏感量 PROCESS( CLK) 2. BEGIN IF CLK'EVENKAND CLK=1 THEN 3456 Q1<=D END F Q<=Q1 CLK信号发生变化时 7. END PROCESS PROCESS被执行
何时 PROCESS 被执行？ 进程敏感量 1. PROCESS ( CLK ) 2. BEGIN 3. IF CLK'EVENT AND CLK = '1' THEN 4. Q1 <= D; 5. END IF; 6. Q<=Q1; 7. END PROCESS; CLK 信号 发生变化时 PROCESS 被执行
看看此 PROCESS的电路? 1. LIBARY正EE 2. USE IEEE STD LOGIC 1164ALL ENTITY and2 IS PORT a STD LOGIC b N STD LOGIC OUT STD LOGIC 8. END ENTITY and2 9. ARCHIEC TURE bhy OF and2 10. SIGNAL Q1 STD LOGIC 11. BEGIN 12.P0 rocess(a begin q <= a and b end process pO 17. END ARCHITEC TURE bhv
看看此PROCESS的电路？ 1. LIBARY IEEE; 2. USE IEEE.STD_LOGIC_1164.ALL; 3. ENTITY and2 IS 4. PORT ( a : IN STD_LOGIC; 5. b : IN STD_LOGIC; 6. q : OUT STD_LOGIC 7. ); 8. END ENTITY and2; 9. ARCHITECTURE bhv OF and2 IS 10. SIGNAL Q1 : STD_LOGIC; 11. BEGIN 12. P0: 13. process(a) 14. begin 15. q <= a and b; 16. end process p0; 17. END ARCHITECTURE bhv;
可以有多个进程出现吗 2. ARCHITECTURE BEHAV OF 3. SIGNAL temp BIT 4. BEGIN 56 PROCESS(a, b, seIx BEGIN IF( sex =0)THEN 8911 ELSE END IF 参见: END PROCESS p-a p138e×520mu 14.p_b PROCESS(temp, c, sely BEGIN F( sely =0) THEN data out<= temp ELSE data out<= C 21. END IF ND PROCESS p b EN
可以有多个进程出现吗？ 1. …… 2. ARCHITECTURE BEHAV OF mul IS 3. SIGNAL temp : BIT 4. BEGIN 5. p_a: 6. PROCESS ( a, b, selx ) 7. BEGIN 8. IF ( selx ='0' ) THEN 9. temp <= a; 10. ELSE 11. temp <= b; 12. END IF; 13. END PROCESS p_a; 14. p_b: 15. PROCESS ( temp, c, sely ) 16. BEGIN 17. IF ( sely ='0' ) THEN 18. data_out<= temp; 19. ELSE 20. data_out<= c; 21. END IF; 22. END PROCESS p_b; 23. END ARCHITECTURE BEHAV; 参见： p138_ex5_20_mul
多个进程之间如何通信? 产生于进程:P_a .2tolmuxd SIGNAL temp data 1)pU1 data b temp sel x MBOT VCC SEL 2tolmux data c HPUT OuTPUT. data out el_y MSS VCC SEL 产生于进程:pb
多个进程之间如何通信？
端口:Port PORT 在电路上的含义 s ENTITY DFF1 S PORT( CLK STD LOGIC. D IN STD LOGIC Q OUT STD LOGIC END entity DFF1;
端口: Port PORT 在电路上的含义？ ENTITY DFF1 IS PORT ( CLK : IN STD_LOGIC; D : IN STD_LOGIC; Q : OUT STD_LOGIC ); END entity DFF1;