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1、第一题:普通触发器LIBRARYIEEE;USEIEEE.STD_LOGIC_1164.ALL;ENTITYDchuISPORT(CLK,D:INSTD_LOGIC;Q:OUTSTD_LOGIC);END;ARCHITECTUREFFQOFDchuISSIGNALQ1:STD_LOGIC;BEGINPROCESS(CLK,Q1)BEGINIFCLK'EVENTANDCLK='1'THENQ1<=D;ENDIF;ENDPROCESS;Q<=Q1;ENDFFQ;第二题：异步清零触发器LIBRARYIE
2、EE;USEIEEE.STD_LOGIC_1164.ALL;ENTITYDchuISPORT(CLK,D:INSTD_LOGIC;Q:OUTSTD_LOGIC;ACLK:INSTD_LOGIC);END;ARCHITECTUREFFQOFDchuISSIGNALQ1:STD_LOGIC;BEGINPROCESS(ACLK,CLK,Q1)BEGINIFACLK='1'THENQ1<='0';ELSIFCLK'EVENTANDCLK='1'THENQ1<=D;ENDIF;ENDPROCESS;Q<=Q
3、1;ENDFFQ;第三题：同步清零触发器LIBRARYIEEE;USEIEEE.STD_LOGIC_1164.ALL;ENTITYDchuISPORT(CLK,D:INSTD_LOGIC;Q:OUTSTD_LOGIC;SCLK:INSTD_LOGIC);END;ARCHITECTUREFFQOFDchuISSIGNALQ1:STD_LOGIC;BEGINPROCESS(SCLK,CLK,Q1)BEGINIFCLK'EVENTANDCLK='1'THENIFSCLK='1'THENQ1<='0';E
4、LSEQ1<=D;ENDIF;ENDIF;ENDPROCESS;Q<=Q1;ENDFFQ;第四题：异步置位apreLIBRARYIEEE;USEIEEE.STD_LOGIC_1164.ALL;ENTITYDchuISPORT(CLK:INSTD_LOGIC;D:INSTD_LOGIC;Q:OUTSTD_LOGIC;APRE:INSTD_LOGIC);END;ARCHITECTUREFFQOFDchuISSIGNALQ1:STD_LOGIC;BEGINPROCESS(APRE,CLK,Q1)BEGI
5、NIFAPRE='1'THENQ1<='1';ELSIFCLK'EVENTANDCLK='1'THENQ1<=D;ENDIF;ENDPROCESS;Q<=Q1;ENDFFQ;第五题：同步置位spreLIBRARYIEEE;USEIEEE.STD_LOGIC_1164.ALL;ENTITYDchuISPORT(CLK:INSTD_LOGIC;D:INSTD_LOGIC;Q:OUTSTD_LOGIC;SPRE:INSTD_LOGIC);END;ARCHITECTUREFFQOFDchuISSIGNAL
6、Q1:STD_LOGIC;BEGINPROCESS(SPRE,CLK,Q1)BEGINIFCLK'EVENTANDCLK='1'THENIFSPRE='1'THENQ1<='1';ELSEQ1<=D;ENDIF;ENDIF;ENDPROCESS;Q<=Q1;ENDFFQ;第六题：异步清零，异步置位LIBRARYIEEE;USEIEEE.STD_LOGIC_1164.ALL;ENTITYDchuISPORT(CLK:INSTD_LOGIC;ACLR:INSTD_LOGIC;APRE:INSTD_LO
7、GIC;D:INSTD_LOGIC;Q:OUTSTD_LOGIC);END;ARCHITECTUREFFQOFDchuISSIGNALQ1:STD_LOGIC;BEGINPROCESS(APRE,ACLR,CLK,Q1)BEGINIFACLR='1'THENQ1<='0';ELSIFAPRE='1'THENQ1<='1';ELSIFCLK'EVENTANDCLK='1'THENQ1<=D;ENDIF;ENDPROCESS;Q<=Q1;ENDFFQ;第七题：同步使能LIBRARYIEEE;USEIE
8、EE.STD_LOGIC_1164.ALL;ENTITYDchuISPORT(CLK:INSTD_LOGIC;D:INSTD_LOGIC;Q:OUTSTD_LOGIC;EN:INSTD_LOGIC);END;ARCHITECTUREFFQOFDchuISSIGNALQ1:STD_LOGIC;BEGINPROCESS(EN,CLK,Q1)BEGINIFCLK'EVENTANDCLK='1'THENIFEN='1'THENQ1<=D;ENDIF;ENDIF;ENDPROCESS;Q<=
